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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
Showing 1 - 200 of 265 Journals sorted alphabetically
Accountability in Research: Policies and Quality Assurance     Hybrid Journal   (Followers: 19)
Acta Nova     Open Access   (Followers: 2)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
Acta Scientifica Naturalis     Open Access   (Followers: 4)
Adıyaman University Journal of Science     Open Access  
Advanced Science     Open Access   (Followers: 16)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 8)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 4)
Advances in Research     Open Access  
Advances in Science and Technology     Full-text available via subscription   (Followers: 18)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 8)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 1)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 3)
Alfarama Journal of Basic & Applied Sciences     Open Access   (Followers: 12)
American Academic & Scholarly Research Journal     Open Access   (Followers: 4)
American Journal of Applied Sciences     Open Access   (Followers: 22)
American Journal of Humanities and Social Sciences     Open Access   (Followers: 14)
Anales del Instituto de la Patagonia     Open Access  
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 2)
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 1)
Archives Internationales d'Histoire des Sciences     Partially Free   (Followers: 5)
Archives of Current Research International     Open Access  
ARPHA Conference Abstracts     Open Access   (Followers: 1)
ARPHA Proceedings     Open Access  
Asian Journal of Advanced Research and Reports     Open Access  
Asian Journal of Scientific Research     Open Access   (Followers: 2)
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 5)
Australian Field Ornithology     Full-text available via subscription   (Followers: 1)
Australian Journal of Social Issues     Hybrid Journal   (Followers: 6)
Bangladesh Journal of Scientific Research     Open Access  
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 1)
Berichte Zur Wissenschaftsgeschichte     Hybrid Journal   (Followers: 11)
Bilge International Journal of Science and Technology Research     Open Access  
Bioethics Research Notes     Full-text available via subscription   (Followers: 15)
BJHS Themes     Open Access   (Followers: 5)
Bulletin de la Société Royale des Sciences de Liège     Open Access  
Bulletin of the National Research Centre     Open Access  
Chain Reaction     Full-text available via subscription  
Ciencia Amazónica (Iquitos)     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia Ergo Sum     Open Access  
Ciência ET Praxis     Open Access  
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Comunicata Scientiae     Open Access  
Conference Papers in Science     Open Access  
Configurations     Full-text available via subscription   (Followers: 11)
COSMOS     Hybrid Journal   (Followers: 1)
Crea Ciencia Revista Científica     Open Access  
Current Issues in Criminal Justice     Hybrid Journal   (Followers: 14)
Current Research in Geoscience     Open Access   (Followers: 6)
Data     Open Access   (Followers: 4)
Dhaka University Journal of Science     Open Access  
Discover Sustainability     Open Access   (Followers: 4)
Einstein (São Paulo)     Open Access  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Emergent Scientist     Open Access  
Enhancing Learning in the Social Sciences     Open Access   (Followers: 8)
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Entramado     Open Access  
Entre Ciencia e Ingeniería     Open Access  
Epiphany     Open Access   (Followers: 1)
Ethiopian Journal of Education and Sciences     Open Access   (Followers: 5)
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 4)
European Scientific Journal     Open Access   (Followers: 11)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Exchanges : the Warwick Research Journal     Open Access   (Followers: 1)
Experimental Results     Open Access   (Followers: 2)
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access  
Fontanus     Open Access   (Followers: 1)
Forensic Science Policy & Management: An International Journal     Hybrid Journal   (Followers: 292)
Frontiers in Climate     Open Access   (Followers: 5)
Frontiers in Science     Open Access   (Followers: 1)
Fundamental Research     Open Access  
Futures & Foresight Science     Hybrid Journal   (Followers: 1)
Gaudium Sciendi     Open Access  
Ghana Studies     Full-text available via subscription   (Followers: 15)
Global Journal of Pure and Applied Sciences     Full-text available via subscription  
Globe, The     Full-text available via subscription   (Followers: 4)
HardwareX     Open Access  
Heidelberger Jahrbücher Online     Open Access  
Heliyon     Open Access   (Followers: 1)
History of Science and Technology     Open Access   (Followers: 5)
Hoosier Science Teacher     Open Access  
Indian Journal of History of Science     Hybrid Journal   (Followers: 2)
Instruments     Open Access  
Interciencia     Open Access  
International Annals of Science     Open Access  
International Journal of Advanced Multidisciplinary Research and Review     Open Access  
International Journal of Applied Science     Open Access  
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Network Science     Hybrid Journal   (Followers: 3)
International Journal of Social Sciences and Management     Open Access   (Followers: 3)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 10)
International Science and Technology Journal of Namibia     Open Access   (Followers: 2)
International Scientific and Vocational Studies Journal     Open Access  
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Investigacion y Ciencia     Open Access   (Followers: 1)
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
iScience     Open Access   (Followers: 2)
Issues in Science & Technology     Free   (Followers: 9)
Ithaca : Viaggio nella Scienza     Open Access  
J : Multidisciplinary Scientific Journal     Open Access  
Jaunujų mokslininkų darbai     Open Access   (Followers: 3)
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription  
Journal of Chromatography & Separation Techniques     Open Access   (Followers: 9)
Journal of Advanced Research     Open Access   (Followers: 2)
Journal of Analytical Science & Technology     Open Access   (Followers: 5)
Journal of Applied Science and Technology     Full-text available via subscription   (Followers: 1)
Journal of Applied Sciences and Environmental Management     Open Access   (Followers: 1)
Journal of Big History     Open Access   (Followers: 4)
Journal of Composites Science     Open Access   (Followers: 4)
Journal of Diversity Management     Open Access   (Followers: 4)
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Institute of Science and Technology     Open Access  
Journal of King Saud University - Science     Open Access  
Journal of Mathematical and Fundamental Sciences     Open Access  
Journal of Negative and No Positive Results     Open Access  
Journal of Responsible Technology     Open Access  
Journal of Science and Technology     Open Access   (Followers: 2)
Journal of Science and Technology     Open Access   (Followers: 1)
Journal of Science and Technology (Ghana)     Open Access   (Followers: 3)
Journal of Science and Technology Policy Management     Hybrid Journal   (Followers: 1)
Journal of Science Foundation     Open Access   (Followers: 1)
Journal of Scientific Research and Reports     Open Access   (Followers: 1)
Journal of Shanghai Jiaotong University (Science)     Hybrid Journal  
Journal of Social Science Research     Open Access   (Followers: 2)
Journal of Taibah University for Science     Open Access  
Journal of the Ghana Science Association     Full-text available via subscription   (Followers: 3)
Journal of the History of Ideas     Full-text available via subscription   (Followers: 199)
Journal of the Indian Institute of Science     Hybrid Journal   (Followers: 4)
Journal of the Royal Society of New Zealand     Hybrid Journal   (Followers: 49)
Journal of the South Carolina Academy of Science     Open Access  
Journal of Unsolved Questions     Open Access  
Jurnal Sains Dasar     Open Access  
Jurnal Teknosains     Open Access  
Karaelmas Science and Engineering Journal     Open Access  
Karbala International Journal of Modern Science     Open Access  
Kennedy Institute of Ethics Journal     Full-text available via subscription   (Followers: 10)
Logo STI Science, Technology and Innovation     Open Access   (Followers: 14)
Malawi Journal of Science and Technology     Open Access   (Followers: 6)
Maskana     Open Access  
MethodsX     Open Access  
Mètode Science Studies Journal : Annual Review     Open Access  
Modern Applied Science     Open Access   (Followers: 1)
Momona Ethiopian Journal of Science     Open Access   (Followers: 5)
National Academy Science Letters     Hybrid Journal   (Followers: 3)
National Science Review     Hybrid Journal   (Followers: 1)
Natural Sciences     Open Access  
Natural Sciences Education     Hybrid Journal   (Followers: 1)
Naturen     Full-text available via subscription  
Nepal Journal of Science and Technology     Open Access  
Network Science     Hybrid Journal   (Followers: 4)
Nordic Journal of Science and Technology     Open Access   (Followers: 2)
Nordic Studies in Science Education     Open Access   (Followers: 4)
Nova     Open Access  
Open Conference Proceedings Journal     Open Access  
Open Journal of Applied Sciences     Open Access  
Orbis Cógnita : Revista Científica     Open Access   (Followers: 1)
Patterns     Open Access   (Followers: 9)
People and Nature     Open Access   (Followers: 4)
Población y Desarrollo - Argonautas y caminantes     Open Access  
Politique et Sociétés     Full-text available via subscription   (Followers: 1)
Portal de la Ciencia     Open Access  
Proceedings of the Indian National Science Academy     Full-text available via subscription   (Followers: 4)
Proceedings of the Linnean Society of New South Wales     Full-text available via subscription   (Followers: 2)
Proceedings of the Royal Society of Queensland, The     Full-text available via subscription  
QScience Connect     Open Access  
Quantum Science and Technology     Hybrid Journal   (Followers: 15)
Rafidain Journal of Science     Open Access  
Rehabilitation Research, Policy, and Education     Hybrid Journal   (Followers: 2)
Reportes Científicos de la FaCEN     Open Access  
Reports in Advances of Physical Sciences     Open Access  
Research Ideas and Outcomes     Open Access  
Research Integrity and Peer Review     Open Access   (Followers: 1)
Research Policy : X     Open Access   (Followers: 3)
Respuestas     Open Access  
Revista Bases de la Ciencia     Open Access  
Revista Cientifica Guillermo de Ockham     Open Access  
Revista Conhecimento Online     Open Access  
Revista Crítica de Ciências Sociais     Open Access  
Revista de Ciencia y Tecnología     Open Access  
Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales     Open Access  
Revista de la Universidad del Zulia     Open Access  
Revista Politécnica     Open Access  
Revista Tecnológica     Open Access  
Revista UniVap     Open Access  
Revista Vivências em Ensino de Ciências     Open Access   (Followers: 1)
SAINSTIS     Open Access  
Sainteknol : Jurnal Sains dan Teknologi     Open Access  
Sci     Open Access  
Science     Full-text available via subscription   (Followers: 5422)
Science & Diplomacy     Free   (Followers: 3)
Science Advances     Free   (Followers: 45)
Science and Technology     Open Access   (Followers: 2)
Science Heritage Journal     Open Access  
Science World Journal     Open Access  
Science, Technology and Arts Research Journal     Open Access   (Followers: 1)
ScienceRise     Open Access  

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Nepal Journal of Science and Technology
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1994-1412
Published by Nepal Journals Online Homepage  [155 journals]
  • Immature Production of Dengue Virus Vectors in Residential and
           Non-residential Areas of Lalitpur Municipality, Nepal

    • Authors: Aradhana KC, Manchita Kumari Aryal, Ishan Gautam, Hans Jorgen Overgaard
      Pages: 1 - 14
      Abstract: Global incidence of dengue has grown over recent decades, with half of the population now at risk. Vector control is the main way to control dengue disease, as many dengue vaccines are still under research. Aedes aegypti and Aedes albopictus are the vector species, responsible for dengue transmission in the world. The repeated larvae and pupae sampling of eight times in dry and wet seasons (May to September) was conducted within 100 houses including residential and non-residential. Dipping method using standard dippers were used for immature mosquito collection. This study foundthat non- residential areas are preferred breeding sites for dengue mosquitoes compared to residential premises. The Stegomyia indices, House Index (HI), Container Index (CI) and Breteau Index (BI) were found higher in non-residential houses than that of residential houses.The statistical analysisshows strong significant differences, p<0.05 when compared between two seasons (dry and wet). Seven different types of containers classified by shape, use and materials contribute 72-74% of immature dengue mosquitoes. This study concludes that for dengue mosquitoes’ production, dark coloured containers found in both residential and non-residential sites are highly productive. Thus, further studies covering all seasons and households are highly recommended in the study sites leading to effective vector control actions targeting all types of productive wet containers available in the study area and elsewhere.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67154
      Issue No: Vol. 22, No. 1 (2023)
       
  • Factors Associated with the use of Institutional Delivery Services by
           Mothers in a Community of Gorkha, Nepal

    • Authors: Archana Bagale, Shristi Lamichhane
      Pages: 15 - 21
      Abstract: Institutional delivery is a delivery that takes place at any medical facility staffed by skilled delivery assistance. A descriptive cross-sectional study design was adopted to find out the factors associated with institutional delivery service utilization among mothers. The study was done in wards 6 and 11 of Gorkha Municipality in Gorkha district. The sample size was 80. The data were analysed using SPSS 16. The majority of the respondents, i.e., 97.5%, were literate, and 60% of the respondents were homemakers. 38.5% of the respondent’s husband was involved in foreign employment. Obstetric factors for institutional delivery depict nearly three-fourths of the total respondents, i.e., 72.5% of mothers marry at the age of 15-20 years; nearly half, i.e., 48.8% of mothers deliver babies at the age of 21–25; and the majority of the respondents, i.e., 97.5%, visited for an ANC checkup more than four times. Only 18.8% had complications during pregnancy. The majority of the respondents, i.e., 97.5%, thought health institutions were the best place for delivery, of which 60.3% chose health institutions for quality services. The majority of the respondents, 93.8%, delivered babies at health institutions. Enabling factors for institutional delivery depict nearly two-thirds of the respondents, i.e., 62.5%, making their own decisions. The majority of the respondents, i.e., 85.7%, received delivery services by a nurse; nearly half of the respondents, i.e., 47.5%, travelled 30–60 minutes. More than half of the respondents (55.0%) went to health institutions by vehicle. Similarly, 57.1% of the respondents received health care within 15 minutes. The present study concluded that, in spite of the higher proportion of institutional delivery, no significant association was found among the selected socio-demographic variables, i.e., educational status, spouse educational status, ethnicity, religion level, and monthly income.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67157
      Issue No: Vol. 22, No. 1 (2023)
       
  • Molecular identification of Chinese citrus fly, Bactrocera minax (Diptera:
           Tephritidae) in Nepal

    • Authors: Debraj Adhikari, Resham B Thapa, Samudra L Joshi, Jason J Du, Roji Raut, Prajwal Manandhar, Pragun Rajbhandari, Dibesh Karmacharya
      Pages: 22 - 28
      Abstract: An accurate identification at the species level is often the first step in successfully controlling, mitigating and managing of insect pests. Species identification utilizing molecular approaches can complement morphological identification, often resulting more accurate result. Tephritid fruit fly insects can be identified quickly using DNA barcoding technology. In this study, Chinese fruit fly (Bactrocera minax), a destructive citrus pest collected in Nepal, was identified using barcoding method with the sequence of mitochondrial cytochrome c oxidase I (COI) gene.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67158
      Issue No: Vol. 22, No. 1 (2023)
       
  • Enhancement of secondary radiation flux energy 3.63 % during appearance of
           Full Moon on October 13, 2022 at Udaipur (Rajasthan), India

    • Authors: Devendra Pareek, Deepali Baregama
      Pages: 29 - 37
      Abstract: We observed variation of secondary radiation flux energy (SRFE) at Udaipur (27o 43’ 12.00” N, 75o 28’ 48.01” E), Rajasthan, India during Full Moon in month of October, 2022. In this experimental study ground based NaI (Tl) Scintillation detector used. The data files were stored in computer for half hour duration around time 21.00 IST to 21.30 IST on October 6, 9, 10, 11, 12, 13, 14 and 15. The objective in this study is to observe secondary radiation flux energy during Full Moon. Analyzed data reveal significant enhancement of secondary radiation flux energy about 3.63 % on date of full Moon. We interpret such variation of SRFE on the basis of more reflection of solar radiation form surface of Full Moon.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67159
      Issue No: Vol. 22, No. 1 (2023)
       
  • Multi-drug Resistant Staphylococcus aureus and Escherichia coli in
           Marketed Raw Meat in Kathmandu Valley

    • Authors: Deepa Neupane, Joshna Thapa, Sushil Neupane, Namrata Dulal, Sushma Kathet, Sudeep K.C., Santosh Khanal, Janak Raj Dhungana
      Pages: 38 - 43
      Abstract: Antimicrobial resistance is a critical worldwide issue that affects both humans and animals. Antimicrobial resistance in microorganisms has been associated to the indiscriminate use of antibiotics in livestock and poultry. Bacterial antimicrobial resistance is witnessing a rapid rise in both human and animal health sector. Still antimicrobial resistance patterns in Nepal are poorly documented, with only a few studies on bacterial prevalence and antimicrobial resistance pattern have been done. This study characterized and provided antimicrobial resistance status of bacteria from raw meat sold in Kathmandu valley. This study was conducted with an objective to find the prevalence and antibiotic susceptibility pattern of Staphylococcus aureus and Escherichia coli from raw meat sold in Kathmandu valley. The cross-sectional study was conducted from February to April 2022 at Nepalese Farming Institute, Dillibazar, Kathmandu. A total of 100 raw meat samples, chicken (n= 60), pork (n=20) and buff (n=20) were collected from different retail shops. The meat samples were minced and enriched in M-Staph broth and MacConkey broth at 37°C for 24 h. The suspension was sub-cultured on Mannitol salt agar and MacConkey agar. The bacterial isolates were identified on the basis of colony morphology, Gram’s staining reaction and biochemical tests. Antibiotic susceptibility pattern of bacterial isolates were determined by modified Kirby-Bauer disc diffusion method according to Clinical & Laboratory Standards Institute (CLSI) guidelines. Out of 100 meat samples, 162 bacterial isolates were detected, where E. coli 51.85% (n=84) was the most prevalent bacteria followed by S. aureus 48.15% (n=78). Majority of E. coli isolates (63.09%) were resistant to tetracycline and most of S. aureus isolates (37.1%) were resistant to gentamicin. Multi-drug resistance was higher in E. coli (51.1%) than S. aureus (23.07%). Therefore controlled use of antibiotics in all sectors should be implemented and proper policy and regulations should be formulated on meat handling.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67160
      Issue No: Vol. 22, No. 1 (2023)
       
  • The Preliminary Online Survey on E-waste Literacy in Nepal

    • Authors: Jyoti Giri, Hemraj Joshi, Geeta Aryal, Cynthiya Shrestha, Rameshwar Adhikari
      Pages: 44 - 55
      Abstract: Electrical and electronic wastes (E-wastes) are complex waste and a new to the community. They are boon of new advanced technology serving the sophisticated society on the Earth; however, they are disaster from environmental point of view. E-waste is complex in its composition with small quantities of expensive metals such as Gold, Silver, Platinum, and Copper and even toxic metals such as Lead, Cadmium, and rare earth metals (including Yttrium, Indium and many more). Knowing the value of these metals and their recyclability as well as the toxicity of some constituents, it has become important to develop proper regulations as well as appropriate strategies and technologies to extract and detoxify all the elements present in them. Moreover, that one should know the type of waste he or she is producing and be responsible for its proper management. With these concerns, from September 6 - Oct 6, 2020 during Covid-19 lockdown period, an online survey was conducted by creating a Google form in which 453 participants submitted their opinion responding to the queries prepared in the form. The survey was requested by sending group E-mails and the virtual platform of Facebook, messenger with tagging many people in academia, waste management, stakeholders of science waste workers and many other people in community for wide dissemination of survey. During the pandemic lockdown the whole world was subjected to virtual platform. Education sector came first in the virtual platform during lockdown and the data response show that women from education background are in majority due to their free time waiting for virtual class. The survey showed ratio of women respondents higher than men, (with women to men ratio of 1.6:1 and 76 % were students). The higher numbers of replier were from the age group of 17-40. The replies indicated that 63% of reporters were aware of the E-wastes. However, 83% of people know the health hazard of E-waste. The interesting part of the survey was that 73.7% of respondents were segregating E-waste from other wastes due to their economic value. As 75% reported their knowledge about precious metal contents in it and 80.6% knew their recyclability. The survey revealed that a significant fraction of the population, especially comprising the students, was literate on E-wastes knowing about their economic values and possible hazards to health and the environment.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67161
      Issue No: Vol. 22, No. 1 (2023)
       
  • Hepatoprotective Potential of Selected Medicinal Plants: Evaluating their
           Antioxidant and Antibacterial Activities

    • Authors: Khem Raj Joshi, Sabina Parajuli
      Pages: 56 - 63
      Abstract: From the survey, a total of 41 plant species belonging to 30 families were found to be useful in the treatment of hepatic disorders. The mostly used were the whole plant of Cuscuta reflexa (85%) and fruits of Carica papaya (50%), Saccharum officinarum (46.5%) and Cucurbita pepo (44.5%). Herbal remedies were mostly prepared from freshly collected plants and used alone or with water. Among the documented species, six plant parts, that were least studied previously, were selected for the study of antioxidant and antibacterial activities. The extracts of Diplazium stoliczkae, rhizomes and leaves both, with IC50 value, 5.54 and 5.49 µg/ml respectively, close to that of standard, ascorbic acid (4.80 µg/ml) showed potent antioxidant activity against 1,1-diphenyl-2-picryl hydrazyl (DPPH) free radical. Also, the extracts of rhizomes and leaves of D. stoliczkae and bark of Bombax Ceiba showed antibacterial activity comparable to that of standard drugs at a concentration of 1 mg/ml.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67162
      Issue No: Vol. 22, No. 1 (2023)
       
  • Effects of In-Situ Clay-Induced Formation Damage on Oil Recovery during
           Low-Salinity-Based Enhanced Oil Recovery Method in a Sandstone Reservoir
           of Upper Assam Basin, India

    • Authors: Nayan Medhi
      Pages: 64 - 75
      Abstract: Clay-Induced formation damage is a worldwide problem in the petroleum industry, which is caused by the swelling and migration of clays and subsequent plugging of the pore throats. The In-Situ formation damage by clay minerals in sandstone reservoirs is governed by the physicochemical factors that control the stability and transport of the clays. The study presented here focuses on the effects of In-Situ Clay-Induced Formation Damage on oil recovery during Low Salinity Waterflooding (LSW) in the Tipam Reservoir Sandstone of Upper Assam Basin, India. Analysis of reservoir rock, formation brine, and crude oil shows the feasibility of LSW in the study area. The paper describes the alteration of rock permeability and porosity in a series of core flooding experiments using low-salinity brine. It is observed that the permeability and porosity of the flooded core plugs decrease during LSW. The SEM analysis of the fines migrated along with the effluent water during core flooding shows the presence of Kaolinite, Illite, and Mixed-layer. The study shows that the permeability reduction occurs during LSW through the plugging of pore throats which may be due to some mechanical and chemical processes like migration and swelling of clays. This plugging can increase the oil recovery by enhancing the Sweep Efficiency. Also, the migrated clay minerals can enhance the oil recovery by wettability modification and reduction of oil-water Interfacial Tension (IFT). Further, the permeability decline in the Swept Zone may improve the LSW performance by increasing the water breakthrough time and reducing the water cut.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67163
      Issue No: Vol. 22, No. 1 (2023)
       
  • Effect of Various Organic Priming Treatments on the Performance of
           Bittergourd (Momordica Charantia L)

    • Authors: Nisha Karki, Rekha Bhattarai, Eliza Ghimire, Kapil Khanal
      Pages: 76 - 84
      Abstract: A field experiment was carried out in Godak-10, Ilam, during the cropping season of February to July 2021, to investigate the effect of organic seed priming treatments on bitter gourd growth performance. Hard seed coat of bitter gourd puts mechanical restriction on embryo development and it is the reason for poor seedling problems. Seed priming is the method not only to improve germinations, vigour and uniform emergence of seedlings in field conditions but also to improve crop establishment and ultimately enhance the yield. The experiment was done in a double-factor randomized complete block design with 3 replications and 8 treatments. Three varieties of bittergourd viz. Palee, Asmita (Syngenta), and local, were assigned as the first factor. Whereas, priming treatments with cow milk and water 1:1, cow urine and water 1:1, cow dung slurry and water 1:2, water and control (no priming) were assigned as second factor. Parameters such as seed germination percentage (83.66%), day to emergence (9 days), seedling’s stem diameter (3.12 mm), shoot weight (1.8 gm), shoot length (11.5 cm), root length (14.4 cm), plant height 20 days after transplanting (67.4 cm) and 40 days after transplanting (125 cm), number of leaves 20 days after transplanting (21) and tendrils 20 days after transplanting (14), day to first flowering (33 days), day to first fruit set (39 days) and yield (3.02 kg/plant) were significantly higher in the variety Palee. Seed germination percentage (71.55%), seedling stem diameter (3.05 mm) were significantly higher with the priming treatment of cow urine and water 1:1, but other parameters, the priming treatment was significantly at par with all treatments except control. The study indicated that presoaking of bittergourd seeds in organic priming treatment, i.e., cow urine and water 1:1, could render better growth performance.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67164
      Issue No: Vol. 22, No. 1 (2023)
       
  • A Comparative Study of the Seismic Behavior of Composite (Steel-Concrete)
           and Reinforced Concrete Structure

    • Authors: Rajan Suwal, Pasang Chhiring Sherpa, Nitesh Bhandari
      Pages: 85 - 97
      Abstract: The low weight, high strength, and durability of steel-concrete composite construction have made it quite popular worldwide. However, it is not commonly used in Nepal. For the country, avoiding composite construction when it is economically viable is a great loss. Using composite materials is of particular interest due to their potential to improve performance through rather small changes in manufacturing and construction technologies. Steel concrete composite construction means the concrete slab is connected to the composite beam with the help of shear connectors so that they act as a single unit. In this paper we intend to compare the parameters like storey drift, time period, deflections, etc. between composite and RC structures for 6, 10 and 15 stories regular and irregular buildings situated in earthquake zone V. ETABS software was used for the analysis and linear static method, linear time history method and static pushover method were performed. The results are compared and we found out that composite constructions are more suitable in multi- storied buildings compared to RC structures.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67166
      Issue No: Vol. 22, No. 1 (2023)
       
  • Science Communication and Role of Media in Nepal

    • Authors: Raju Adhikari, Suresh Kumar Dhungel, Bharat R Poudel
      Pages: 98 - 114
      Abstract: The importance of communicating scientific knowledge was realized very early in the developed countries. Today most universities and educational institutions have devised science and journalism courses and use innovative approaches to increase the understanding and application of science knowledge for access to a general audience. The exponential growth of information technology and growing interests >90% seeking science related information in social, news and print media has helped science communication flourish in developed countries. On the other hand, in the developing countries science communication is still not a priority. Of various S&T institutions, National Academy of Science and Technology (NAST) stands out for taking major initiative. The advancement of communication technology and changing dynamics of social media due to internet, Facebook and google access has helped Nepal to raise social awareness but providing evidenced based information remains a low priority. The chapter attempts to review the history of science education and communication in Nepal and the role of Nepalese media and global media trends. The information presented is based on published and unpublished literature and feedback from S&T institutions and schools, policymakers, school teachers, students, parents and community leaders. A list of Key performance indicators (KPIs) such as funding source, teachers’ availability, students’ enrolments, resource availability and development trends of the science education and community science awareness program in regional and remote areas are discussed.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67167
      Issue No: Vol. 22, No. 1 (2023)
       
  • Electronic Properties of Semiconducting Nanowires: A Comparative Study

    • Authors: Sanjay Prakash Kaushik, Manoj Kaushik, Satyendra Singh, Ram-Krishna Thakur, Vivek Kumar Shukla, Vijay Kaushik
      Pages: 115 - 120
      Abstract: The presented work has explored the comparative study of electronic properties of semi conducting nanowires of different materials. These nanowires have critical role in photovoltaic and it shapes the future of new and renewable energy. The study has been performed for different shapes of nanowires. The various shapes under consideration are 2-atom Linear Nanowire, 2-atom Zigzag Nanowire, 4-atom Square Nanowire and 6-atom Hexagonal Nanowire. The findings for electronic properties reveal that 2-atom linear wire can be conducting as well semi conducting, 2-atom zigzag wire is conducting for almost all materials, 4-atom square wire is insulating for most of the materials while 6-atom hexagonal wire has come out to be insulating for all materials. Hence a semiconducting material shows conducting, semiconducting and insulating behavior depending on the proposed shape for various materials.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67168
      Issue No: Vol. 22, No. 1 (2023)
       
  • Effect of Starch Coating on Shelf-Life and Biochemical Properties of
           Daucus carota

    • Authors: Shanta Pokhrel, Bibisha Basnet, Dhruba Raj Bhattarai, Anjali Shrestha, Anand Kumar Yadav, Ishwori P Gautam
      Pages: 121 - 128
      Abstract: A simple root vegetable (Daucus carota), often called as carrot, is usually conical or cylindrical in shape. It has a great medicinal value and different health benefits. The main objective of the study is to evaluate the effect of starch coating on shelf-life and biochemical properties of carrot. Total soluble solid (TSS) and titrable acidity (TA) was measured by hand refractometer method. The carrot treated with calcium chloride was more acidic 0.72 (±0.075) than distilled water 0.46 (±0.086) and starch 0.48 (±0.074) at 10 days after storage. Total soluble solid was found maximum at 10 days after storage (11.9 °Brix). As measured by spectrophotometer, carrot coated with starch had considerably high β-carotene content (21.78 mg/100 g) as compared to calcium chloride (17.39 mg/100 g) and distilled water (17.19 mg/100 g). Highest physiological weight loss was exhibited by calcium chloride as compared to distilled water and starch. Shelf-life of carrot was shorter in calcium chloride as compared to distilled water and starch; longest shelf-life was exhibited by starch coated carrot.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67169
      Issue No: Vol. 22, No. 1 (2023)
       
  • Assessing the Climate Change Vulnerability of the Communities Residing in
           Doda River Basin, Far-Western Nepal

    • Authors: Tark Raj Joshi, Satyam Kumar Chaudhari, Prakriti Koirala, Mahesh Prasad Awasthi, Sudeep Thakuri, Ramesh Raj Pant, Kumari Tulshi Bhatta, Pawan Kumar Neupane
      Pages: 129 - 143
      Abstract: The study evaluates the vulnerability and climate change (CC) impacts on livelihood-related services aiming to identify strategies for enhancing resilience and adaptation. Key aspects of the study include the analysis of hydro-meteorological data, examination of climatic variability evidence, and vulnerability assessments related to CC. Vulnerability to CC varies based on exposure, sensitivity, and adaptation capacity, especially within a small spatial scale. Employing a bottom-up approach, the study applied trend analysis, Mann-Kendall statistical trend, IPCC vulnerability equation, and the Capacity Building and Vulnerability Assessment (CBCA) framework as fundamental methodologies. Meteorological and household data validate climatic trends and vulnerability. Significant changes in climatic parameters are observed, mirroring previous studies. Local communities experience decreased rainfall frequency, frequent floods, extended dry seasons, delayed monsoons, and intense late summer rainfall, verified by data from the nearest meteorological station. The exposure index ranges from 2.35 to 3.87, with wards 1 and 6 of Laljhadi Rural Municipality (RM) having the least exposure while ward 3 the highest, according to respondent perceptions. Sensitivity is highest in wards near the Doda River, with ward 4 having the highest sensitivity index. Adaptive capacity indices range from 2.01 to 3.68, with the least in wards 1 and 6. The highest vulnerability is observed in wards 3, 4, and 2 with vulnerability scores of 16.8, 13.6, and 11.1, respectively. Overall, the vulnerability calibration index indicated low adaptive capacity across all wards, emphasizing the need to enhance adaptive capabilities as a key recommendation for reducing CC vulnerability.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67170
      Issue No: Vol. 22, No. 1 (2023)
       
  • Isolation of Peroxidase enzyme from various vegetables and coupling to IgG

    • Authors: P. Hemalatha, K. Shivani, M. Godavari, T. Sri Vidhya, S. Manju Devi, A. Sai Padma
      Pages: 144 - 153
      Abstract: Coupling of IgG with peroxidase enzyme finds various applications in determining the antigen-antibody interactions, in diagnostics or for research purpose. In the present study, Peroxidase enzyme was isolated from various vegetables like tomato (Solanum lycopersicum), cabbage (Brassica oleracea) and Radish (Raphanus sativus) and partial purification of enzymes was done with ammonium sulphate fractionation to 80% saturation. The active peroxidase enzyme was coupled to Goat anti-human IgG and the efficiency of coupling procedure was tested against Protein A sepharose purified human IgG. The coupling procedure was done by using sodium periodate and coupling was confirmed by dot blot and ELISA procedures. The present study provides an indigenous method to isolate an active peroxidase enzyme and couple to various IgG and use in immuno detection methods at very cost effective manner.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.67171
      Issue No: Vol. 22, No. 1 (2023)
       
  • Study of the Properties of Coconut Fiber to explore Suitability to be used
           in Reinforced Concrete

    • Authors: Khem Raj Joshi, Bharat Mandal, Tarumay Ghoshal
      Pages: 154 - 161
      Abstract: Natural fibers have been utilized in construction materials consistent with the concept of sustainability. These fiber sources are abundant in many parts of the world.  It is established that the orientation of coconut fiber used in concrete mix, attempt to obtain the highest possible ductility as opposed to normal brittle nature of concrete. However, alternative binders must also be utilized in an effort to prolong the useful life of these plant fibers in composite to increase the tension capacity of concrete. The use of these fibers   increases tension capacity of that concrete and reduces negative environmental consequences. Coconut fibers are generally economic and present in abundance thus making it a possible choice for use as a concrete reinforcement material. Therefore, in this study, physical as well as mechanical properties of coconut coir have been evaluated to explore the use of it as favorable concrete reinforcing fiber. It is found that coconut fibers have 0.2 to 0.4 times tensile strength of mild steel. Similarly, its elongation property against mild steel is near about 0.3 times before breaking. The other major property, bonding with concrete is also found comparable to bond of reinforcement with concrete. The Non-toxic and environmental friendly properties are particularly additional advantages on the use of such bio composites in concrete.
      PubDate: 2023-12-31
      DOI: 10.3126/njst.v22i1.64634
      Issue No: Vol. 22, No. 1 (2023)
       
 
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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
Showing 1 - 200 of 265 Journals sorted alphabetically
Accountability in Research: Policies and Quality Assurance     Hybrid Journal   (Followers: 19)
Acta Nova     Open Access   (Followers: 2)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
Acta Scientifica Naturalis     Open Access   (Followers: 4)
Adıyaman University Journal of Science     Open Access  
Advanced Science     Open Access   (Followers: 16)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 8)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 4)
Advances in Research     Open Access  
Advances in Science and Technology     Full-text available via subscription   (Followers: 18)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 8)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 1)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 3)
Alfarama Journal of Basic & Applied Sciences     Open Access   (Followers: 12)
American Academic & Scholarly Research Journal     Open Access   (Followers: 4)
American Journal of Applied Sciences     Open Access   (Followers: 22)
American Journal of Humanities and Social Sciences     Open Access   (Followers: 14)
Anales del Instituto de la Patagonia     Open Access  
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 2)
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 1)
Archives Internationales d'Histoire des Sciences     Partially Free   (Followers: 5)
Archives of Current Research International     Open Access  
ARPHA Conference Abstracts     Open Access   (Followers: 1)
ARPHA Proceedings     Open Access  
Asian Journal of Advanced Research and Reports     Open Access  
Asian Journal of Scientific Research     Open Access   (Followers: 2)
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 5)
Australian Field Ornithology     Full-text available via subscription   (Followers: 1)
Australian Journal of Social Issues     Hybrid Journal   (Followers: 6)
Bangladesh Journal of Scientific Research     Open Access  
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 1)
Berichte Zur Wissenschaftsgeschichte     Hybrid Journal   (Followers: 11)
Bilge International Journal of Science and Technology Research     Open Access  
Bioethics Research Notes     Full-text available via subscription   (Followers: 15)
BJHS Themes     Open Access   (Followers: 5)
Bulletin de la Société Royale des Sciences de Liège     Open Access  
Bulletin of the National Research Centre     Open Access  
Chain Reaction     Full-text available via subscription  
Ciencia Amazónica (Iquitos)     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia Ergo Sum     Open Access  
Ciência ET Praxis     Open Access  
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Comunicata Scientiae     Open Access  
Conference Papers in Science     Open Access  
Configurations     Full-text available via subscription   (Followers: 11)
COSMOS     Hybrid Journal   (Followers: 1)
Crea Ciencia Revista Científica     Open Access  
Current Issues in Criminal Justice     Hybrid Journal   (Followers: 14)
Current Research in Geoscience     Open Access   (Followers: 6)
Data     Open Access   (Followers: 4)
Dhaka University Journal of Science     Open Access  
Discover Sustainability     Open Access   (Followers: 4)
Einstein (São Paulo)     Open Access  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Emergent Scientist     Open Access  
Enhancing Learning in the Social Sciences     Open Access   (Followers: 8)
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Entramado     Open Access  
Entre Ciencia e Ingeniería     Open Access  
Epiphany     Open Access   (Followers: 1)
Ethiopian Journal of Education and Sciences     Open Access   (Followers: 5)
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 4)
European Scientific Journal     Open Access   (Followers: 11)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Exchanges : the Warwick Research Journal     Open Access   (Followers: 1)
Experimental Results     Open Access   (Followers: 2)
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access  
Fontanus     Open Access   (Followers: 1)
Forensic Science Policy & Management: An International Journal     Hybrid Journal   (Followers: 292)
Frontiers in Climate     Open Access   (Followers: 5)
Frontiers in Science     Open Access   (Followers: 1)
Fundamental Research     Open Access  
Futures & Foresight Science     Hybrid Journal   (Followers: 1)
Gaudium Sciendi     Open Access  
Ghana Studies     Full-text available via subscription   (Followers: 15)
Global Journal of Pure and Applied Sciences     Full-text available via subscription  
Globe, The     Full-text available via subscription   (Followers: 4)
HardwareX     Open Access  
Heidelberger Jahrbücher Online     Open Access  
Heliyon     Open Access   (Followers: 1)
History of Science and Technology     Open Access   (Followers: 5)
Hoosier Science Teacher     Open Access  
Indian Journal of History of Science     Hybrid Journal   (Followers: 2)
Instruments     Open Access  
Interciencia     Open Access  
International Annals of Science     Open Access  
International Journal of Advanced Multidisciplinary Research and Review     Open Access  
International Journal of Applied Science     Open Access  
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Network Science     Hybrid Journal   (Followers: 3)
International Journal of Social Sciences and Management     Open Access   (Followers: 3)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 10)
International Science and Technology Journal of Namibia     Open Access   (Followers: 2)
International Scientific and Vocational Studies Journal     Open Access  
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Investigacion y Ciencia     Open Access   (Followers: 1)
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
iScience     Open Access   (Followers: 2)
Issues in Science & Technology     Free   (Followers: 9)
Ithaca : Viaggio nella Scienza     Open Access  
J : Multidisciplinary Scientific Journal     Open Access  
Jaunujų mokslininkų darbai     Open Access   (Followers: 3)
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription  
Journal of Chromatography & Separation Techniques     Open Access   (Followers: 9)
Journal of Advanced Research     Open Access   (Followers: 2)
Journal of Analytical Science & Technology     Open Access   (Followers: 5)
Journal of Applied Science and Technology     Full-text available via subscription   (Followers: 1)
Journal of Applied Sciences and Environmental Management     Open Access   (Followers: 1)
Journal of Big History     Open Access   (Followers: 4)
Journal of Composites Science     Open Access   (Followers: 4)
Journal of Diversity Management     Open Access   (Followers: 4)
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Institute of Science and Technology     Open Access  
Journal of King Saud University - Science     Open Access  
Journal of Mathematical and Fundamental Sciences     Open Access  
Journal of Negative and No Positive Results     Open Access  
Journal of Responsible Technology     Open Access  
Journal of Science and Technology     Open Access   (Followers: 2)
Journal of Science and Technology     Open Access   (Followers: 1)
Journal of Science and Technology (Ghana)     Open Access   (Followers: 3)
Journal of Science and Technology Policy Management     Hybrid Journal   (Followers: 1)
Journal of Science Foundation     Open Access   (Followers: 1)
Journal of Scientific Research and Reports     Open Access   (Followers: 1)
Journal of Shanghai Jiaotong University (Science)     Hybrid Journal  
Journal of Social Science Research     Open Access   (Followers: 2)
Journal of Taibah University for Science     Open Access  
Journal of the Ghana Science Association     Full-text available via subscription   (Followers: 3)
Journal of the History of Ideas     Full-text available via subscription   (Followers: 199)
Journal of the Indian Institute of Science     Hybrid Journal   (Followers: 4)
Journal of the Royal Society of New Zealand     Hybrid Journal   (Followers: 49)
Journal of the South Carolina Academy of Science     Open Access  
Journal of Unsolved Questions     Open Access  
Jurnal Sains Dasar     Open Access  
Jurnal Teknosains     Open Access  
Karaelmas Science and Engineering Journal     Open Access  
Karbala International Journal of Modern Science     Open Access  
Kennedy Institute of Ethics Journal     Full-text available via subscription   (Followers: 10)
Logo STI Science, Technology and Innovation     Open Access   (Followers: 14)
Malawi Journal of Science and Technology     Open Access   (Followers: 6)
Maskana     Open Access  
MethodsX     Open Access  
Mètode Science Studies Journal : Annual Review     Open Access  
Modern Applied Science     Open Access   (Followers: 1)
Momona Ethiopian Journal of Science     Open Access   (Followers: 5)
National Academy Science Letters     Hybrid Journal   (Followers: 3)
National Science Review     Hybrid Journal   (Followers: 1)
Natural Sciences     Open Access  
Natural Sciences Education     Hybrid Journal   (Followers: 1)
Naturen     Full-text available via subscription  
Nepal Journal of Science and Technology     Open Access  
Network Science     Hybrid Journal   (Followers: 4)
Nordic Journal of Science and Technology     Open Access   (Followers: 2)
Nordic Studies in Science Education     Open Access   (Followers: 4)
Nova     Open Access  
Open Conference Proceedings Journal     Open Access  
Open Journal of Applied Sciences     Open Access  
Orbis Cógnita : Revista Científica     Open Access   (Followers: 1)
Patterns     Open Access   (Followers: 9)
People and Nature     Open Access   (Followers: 4)
Población y Desarrollo - Argonautas y caminantes     Open Access  
Politique et Sociétés     Full-text available via subscription   (Followers: 1)
Portal de la Ciencia     Open Access  
Proceedings of the Indian National Science Academy     Full-text available via subscription   (Followers: 4)
Proceedings of the Linnean Society of New South Wales     Full-text available via subscription   (Followers: 2)
Proceedings of the Royal Society of Queensland, The     Full-text available via subscription  
QScience Connect     Open Access  
Quantum Science and Technology     Hybrid Journal   (Followers: 15)
Rafidain Journal of Science     Open Access  
Rehabilitation Research, Policy, and Education     Hybrid Journal   (Followers: 2)
Reportes Científicos de la FaCEN     Open Access  
Reports in Advances of Physical Sciences     Open Access  
Research Ideas and Outcomes     Open Access  
Research Integrity and Peer Review     Open Access   (Followers: 1)
Research Policy : X     Open Access   (Followers: 3)
Respuestas     Open Access  
Revista Bases de la Ciencia     Open Access  
Revista Cientifica Guillermo de Ockham     Open Access  
Revista Conhecimento Online     Open Access  
Revista Crítica de Ciências Sociais     Open Access  
Revista de Ciencia y Tecnología     Open Access  
Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales     Open Access  
Revista de la Universidad del Zulia     Open Access  
Revista Politécnica     Open Access  
Revista Tecnológica     Open Access  
Revista UniVap     Open Access  
Revista Vivências em Ensino de Ciências     Open Access   (Followers: 1)
SAINSTIS     Open Access  
Sainteknol : Jurnal Sains dan Teknologi     Open Access  
Sci     Open Access  
Science     Full-text available via subscription   (Followers: 5422)
Science & Diplomacy     Free   (Followers: 3)
Science Advances     Free   (Followers: 45)
Science and Technology     Open Access   (Followers: 2)
Science Heritage Journal     Open Access  
Science World Journal     Open Access  
Science, Technology and Arts Research Journal     Open Access   (Followers: 1)
ScienceRise     Open Access  

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