Subjects -> BIOLOGY (Total: 3174 journals)
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BIOLOGY (1491 journals)            First | 1 2 3 4 5 6 7 8 | Last

Showing 401 - 600 of 1720 Journals sorted alphabetically
Cryoletters     Full-text available via subscription   (Followers: 4)
Cuadernos de Neuropsicología     Open Access   (Followers: 1)
Current Applied Science and Technology     Open Access  
Current Bioinformatics     Hybrid Journal   (Followers: 13)
Current Biology     Full-text available via subscription   (Followers: 236)
Current Genomics     Hybrid Journal   (Followers: 8)
Current Landscape Ecology Reports     Hybrid Journal   (Followers: 2)
Current Medical Science     Hybrid Journal   (Followers: 1)
Current Molecular Medicine     Hybrid Journal   (Followers: 2)
Current Opinion in Cell Biology     Hybrid Journal   (Followers: 51)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 8)
Current Opinion in Neurobiology     Hybrid Journal   (Followers: 32)
Current Opinion in Structural Biology     Hybrid Journal   (Followers: 26)
Current Opinion in Systems Biology     Hybrid Journal   (Followers: 2)
Current Pharmacogenomics and Personalized Medicine     Hybrid Journal   (Followers: 3)
Current Protein and Peptide Science     Hybrid Journal   (Followers: 8)
Current Proteomics     Hybrid Journal   (Followers: 4)
Current Protocols in Bioinformatics     Hybrid Journal   (Followers: 1)
Current Protocols in Cell Biology     Hybrid Journal  
Current Protocols in Molecular Biology     Hybrid Journal  
Current Protocols in Mouse Biology     Hybrid Journal  
Current Protocols in Neuroscience     Hybrid Journal  
Current Protocols in Plant Biology     Hybrid Journal   (Followers: 2)
Current Protocols in Protein Science     Hybrid Journal   (Followers: 1)
Current Protocols in Stem Cell Biology     Hybrid Journal  
Current Research in Bacteriology     Open Access   (Followers: 3)
Current Research in Biostatistics     Open Access   (Followers: 8)
Current Research in Chemical Biology     Open Access  
Current Research in Neurobiology     Open Access  
Current Research in Parasitology & Vector-Borne Diseases     Open Access  
Current Research in Structural Biology     Open Access   (Followers: 2)
Current Research in Translational Medicine     Full-text available via subscription   (Followers: 1)
Current Research in Virological Science     Open Access   (Followers: 2)
Current Science     Open Access   (Followers: 117)
Current Stem Cell Reports     Hybrid Journal   (Followers: 4)
Current Stem Cell Research & Therapy     Hybrid Journal   (Followers: 8)
Current Topics in Developmental Biology     Full-text available via subscription   (Followers: 3)
Current Topics in Membranes     Full-text available via subscription   (Followers: 1)
Cytotechnology     Hybrid Journal   (Followers: 10)
Database : The Journal of Biological Databases and Curation     Open Access   (Followers: 10)
Dendrochronologia     Hybrid Journal   (Followers: 1)
Developing World Bioethics     Hybrid Journal   (Followers: 6)
Developmental & Comparative Immunology     Hybrid Journal   (Followers: 5)
Developmental Biology     Hybrid Journal   (Followers: 26)
Developmental Cell     Full-text available via subscription   (Followers: 46)
Developmental Dynamics     Hybrid Journal   (Followers: 4)
Developmental Neurobiology     Hybrid Journal   (Followers: 6)
Dhaka University Journal of Biological Sciences     Open Access  
Diatom Research     Hybrid Journal   (Followers: 3)
Differentiation     Hybrid Journal  
Digital Biomarkers     Open Access   (Followers: 1)
Disease Models and Mechanisms     Open Access   (Followers: 1)
Diseases of Aquatic Organisms     Hybrid Journal  
DNA and Cell Biology     Hybrid Journal   (Followers: 9)
DNA Repair     Hybrid Journal   (Followers: 3)
DNA Research     Open Access   (Followers: 4)
Doklady Physics     Hybrid Journal   (Followers: 1)
Drug Discovery Today: Technologies     Full-text available via subscription   (Followers: 12)
Drug Resistance Updates     Hybrid Journal   (Followers: 3)
e-Jurnal Rekayasa dan Teknologi Budidaya Perairan     Open Access  
Ecocycles     Open Access   (Followers: 4)
Ecohydrology & Hydrobiology     Full-text available via subscription   (Followers: 4)
Ecología en Bolivia     Open Access  
Ecological Engineering     Hybrid Journal   (Followers: 4)
Ecological Questions     Open Access   (Followers: 5)
Ecological Solutions and Evidence     Open Access  
Ecology and Society     Open Access   (Followers: 51)
Ecology Letters     Hybrid Journal   (Followers: 256)
Economics & Human Biology     Hybrid Journal   (Followers: 1)
Ecoprint : An International Journal of Ecology     Open Access   (Followers: 4)
Ecoscience     Hybrid Journal   (Followers: 2)
Ecosystem Health and Sustainability     Open Access   (Followers: 1)
Ecosystems and People     Open Access   (Followers: 4)
Educational Technology Research and Development     Partially Free   (Followers: 45)
EDUSAINS     Open Access  
EFB Bioeconomy Journal     Open Access  
Egyptian Journal of Basic and Applied Sciences     Open Access  
Egyptian Journal of Biology     Open Access  
Egyptian Journal of Natural History     Open Access   (Followers: 1)
EJNMMI Research     Open Access  
Ekologia     Open Access  
el-Hayah     Open Access  
Electromagnetic Biology and Medicine     Hybrid Journal  
eLife     Open Access   (Followers: 97)
Embo Molecular Medicine     Open Access   (Followers: 9)
EMBO reports     Full-text available via subscription   (Followers: 23)
Emotion Review     Hybrid Journal   (Followers: 20)
Endangered Species Research     Open Access   (Followers: 6)
Endocrine Connections     Open Access   (Followers: 4)
Endothelium: Journal of Endothelial Cell Research     Full-text available via subscription   (Followers: 4)
Engineering & Technology     Hybrid Journal   (Followers: 23)
Engineering Economist, The     Hybrid Journal   (Followers: 4)
Engineering in Life Sciences     Hybrid Journal   (Followers: 3)
Engineering Optimization     Hybrid Journal   (Followers: 19)
Ensaios e Ciência : Ciências Biológicas, Agrárias e da Saúde     Open Access  
Environmental Biology of Fishes     Hybrid Journal   (Followers: 4)
Environmental DNA     Open Access   (Followers: 1)
Environmental Dynamics and Global Climate Change     Open Access   (Followers: 22)
Environmental Epigenetics     Open Access   (Followers: 2)
Environmental Microbiology     Hybrid Journal   (Followers: 27)
Environmental Microbiome     Open Access  
Environmental Science & Technology     Hybrid Journal   (Followers: 195)
Enzyme and Microbial Technology     Hybrid Journal   (Followers: 12)
Enzyme Research     Open Access   (Followers: 4)
Epidemiology & Infection     Open Access   (Followers: 23)
Epigenomes     Open Access  
EPMA Journal     Open Access  
Ethiopian Journal of Biological Sciences     Open Access   (Followers: 3)
Ethnobiology and Conservation     Open Access   (Followers: 3)
Ethnobiology Letters     Open Access  
Ethnobotany Research & Applications : a journal of plants, people and applied research     Open Access   (Followers: 2)
Ethnoscientia : Brazilian Journal of Ethnobiology and Ethnoecology     Open Access  
Ethology     Hybrid Journal   (Followers: 11)
Ethology Ecology & Evolution     Hybrid Journal   (Followers: 17)
EuPA Open Proteomics     Open Access   (Followers: 2)
EUREKA : Life Sciences     Open Access  
European Journal of Biological Research     Open Access   (Followers: 1)
European Journal of Biology     Open Access   (Followers: 1)
European Journal of Cell Biology     Hybrid Journal   (Followers: 6)
European Journal of Ecology     Open Access   (Followers: 1)
European Journal of Neuroscience     Hybrid Journal   (Followers: 36)
European Journal of Obstetrics & Gynecology and Reproductive Biology     Hybrid Journal   (Followers: 18)
European Journal of Obstetrics & Gynecology and Reproductive Biology : X     Open Access  
European Journal of Phycology     Hybrid Journal   (Followers: 4)
European Journal of Protistology     Hybrid Journal   (Followers: 5)
European Journal of Soil Biology     Hybrid Journal   (Followers: 3)
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 4)
European Scientific Journal     Open Access   (Followers: 1)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
EvoDevo     Open Access   (Followers: 4)
Evolution     Partially Free   (Followers: 142)
Evolution and Human Behavior     Hybrid Journal   (Followers: 23)
Evolution Letters     Open Access   (Followers: 8)
Evolutionary Applications     Open Access   (Followers: 6)
Evolutionary Bioinformatics     Open Access   (Followers: 12)
Evolutionary Biology     Hybrid Journal   (Followers: 25)
Evolutionary Computation     Hybrid Journal   (Followers: 11)
Evolutionary Systematics     Open Access   (Followers: 2)
EXCLI Journal : Experimental and Clinical Sciences     Open Access  
Experimental & Molecular Medicine     Open Access  
Experimental and Applied Acarology     Hybrid Journal   (Followers: 1)
Experimental Parasitology     Hybrid Journal   (Followers: 1)
Expert Opinion on Biological Therapy     Hybrid Journal   (Followers: 4)
Expert Opinion on Environmental Biology     Hybrid Journal  
Expert Review of Proteomics     Hybrid Journal   (Followers: 4)
ExRNA     Open Access  
Extreme Life, Biospeology & Astrobiology - International Journal of the Bioflux Society     Full-text available via subscription   (Followers: 5)
Extremophiles     Hybrid Journal   (Followers: 1)
F&S Science : Official journal of the American Society for Reproductive Medicine     Open Access  
Facta Universitatis, Series : Medicine and Biology     Open Access  
Familial Cancer     Hybrid Journal   (Followers: 2)
FASEB BioAdvances     Open Access  
Fauna Norvegica     Open Access  
Fauna of New Zealand     Open Access  
Febs Journal     Hybrid Journal   (Followers: 26)
Feddes Repertorium     Hybrid Journal  
Fems Yeast Research     Hybrid Journal   (Followers: 11)
FIGEMPA : Investigación y Desarrollo     Open Access   (Followers: 1)
Fire Ecology     Open Access   (Followers: 2)
Fish & Shellfish Immunology     Hybrid Journal   (Followers: 10)
Fish and Shellfish Immunology Reports     Open Access   (Followers: 1)
Fishes     Open Access  
Fitoterapia     Hybrid Journal   (Followers: 4)
Florea : Jurnal Biologi dan Pembelajarannya     Open Access  
Fly     Full-text available via subscription  
Folia Biologica     Free   (Followers: 1)
Folia Histochemica et Cytobiologica     Open Access  
Folia Microbiologica     Hybrid Journal   (Followers: 2)
Folia Primatologica     Full-text available via subscription   (Followers: 4)
Food and Bioproducts Processing     Hybrid Journal   (Followers: 3)
Food and Ecological Systems Modelling Journal     Open Access  
Food and Waterborne Parasitology     Open Access  
Food Webs     Hybrid Journal   (Followers: 1)
Forensic Genomics     Full-text available via subscription   (Followers: 6)
Forest Pathology     Hybrid Journal   (Followers: 1)
Forschung     Hybrid Journal   (Followers: 1)
Foundations of Physics     Hybrid Journal   (Followers: 41)
Free Radical Biology and Medicine     Hybrid Journal   (Followers: 6)
Free Radical Research     Hybrid Journal   (Followers: 2)
Freshwater Science     Full-text available via subscription   (Followers: 14)
Frontiers in Ecology and Evolution     Open Access   (Followers: 45)
Frontiers in Evolutionary Neuroscience     Open Access   (Followers: 7)
Frontiers in Life Science     Hybrid Journal   (Followers: 1)
Frontiers in Marine Science     Open Access   (Followers: 14)
Frontiers in Network Physiology     Open Access   (Followers: 2)
Frontiers in Neurogenesis     Open Access   (Followers: 2)
Frontiers in Neuroprosthetics     Open Access   (Followers: 6)
Frontiers of Biogeography     Open Access   (Followers: 4)
Frontiers of Biology     Hybrid Journal   (Followers: 2)
Frontiers of Environmental Science & Engineering     Hybrid Journal   (Followers: 3)
Frontiers of Medical and Biological Engineering     Hybrid Journal  
Functional & Integrative Genomics     Hybrid Journal   (Followers: 7)
Fundamental and Applied Limnology / Archiv für Hydrobiologie     Full-text available via subscription   (Followers: 3)
Fundamental Research     Open Access  
Fungal Biology     Hybrid Journal   (Followers: 6)
Fungal Biology and Biotechnology     Open Access   (Followers: 2)
Fungal Biology Reviews     Full-text available via subscription   (Followers: 9)
Fungal Diversity     Hybrid Journal   (Followers: 2)
Fungal Ecology     Hybrid Journal   (Followers: 6)
Fungal Genetics Reports     Open Access  

  First | 1 2 3 4 5 6 7 8 | Last

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Journal Cover
Current Applied Science and Technology
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Online) 2586-9396
Published by King Mongkut's Institute of Technology Ladkrabang Homepage  [1 journal]
  • Seed Nutrient and Leaf Mineral Content of Jack Bean (Canavalia ensiformis
           L) Cultivated with Organic and Bio-fertilizers in Grumusol Soil

    • Authors: Yacobus Sunaryo*, Sri Endah Prasetyowati
      Pages: 8 pages - 8 pages
      Abstract: The aim of this study was to determine the seed nutrient content and leaf mineral status of jack bean cultivated in grumusol soil treated with bio-fertilizers and soil ameliorants. The research was conducted on marginal land in Playen Village, Yogyakarta, Indonesia which is at an altitude of 250 m above sea level. The experimental research was conducted with a 2 x 2 x 2 factorial design. The first factor was the type of bio-fertilizers consisting of mycorrhiza and Rhizobium. The second factor was the kind of ameliorants consisting of chicken manure and green manure. The third factor was the dose of bio-fertilizers consisting of 10 g kg-1 seeds, and 20 g kg-1 seeds. Two treatments which were chicken manure and green manure both without bio-fertilizer were used as controls. The results indicated that a combination of green manure and Rhizobium 20 g kg-1 seeds produced the highest protein seed content (28.68 %). The green manure and Rhizobium 10 g kg-1 seeds resulted in the highest carbohydrate seed content (59.98%), while the combination of chicken manure and Rhizobium 10 g kg-1 seeds produced the highest lipid seed content (2.62 %). Moreover, the results indicated that application of chicken manure and mycorrhiza with a dosage of 20 g kg-1 seeds resulted in the highest leaf N content (4.04%), application of green manure and mycorrhiza 20 g kg-1 seeds resulted in the highest leaf P content (0.79%), whereas application of chicken manure and Rhizobium 10 g kg-1 seeds produced the highest leaf K content (1.41%). The application of chicken manure resulted in fewer nodules than green manure application Keywords: grumusol soil; jack bean; seed nutrient; soil amendment *Corresponding author: Tel.: (+62) 81328006295                                             E-mail: yacobus.sunaryo@ustjogja.ac.id
      PubDate: 2022-05-25
       
  • Exploration of Phenotypic Dissimilarity for Drought Tolerance in Maize
           Inbred Line Collection

    • Authors: Pattama Hannok*, Phongsit Kaewunta, Walailak Khunyota, Anittaya Kaewnut, Phongsathorn Pachimkanthong, Chutiwat Tangthavonkarn
      Pages: 9 pages - 9 pages
      Abstract: Cluster analysis is a type of exploratory analysis that is used for classifying unknown individuals into groups of members that share certain similarity. Grouping breeding materials into different clusters based on their performances under a given condition allows plant breeders to select breeding lines more efficiently. This study aimed to group breeding materials based on their performance under water stress conditions using cluster analysis. The experiment was conducted in RCB design with 3 blocks. Fifty maize inbred lines were grown and exposed to water stress conditions. Twenty-four phenotypic traits were collected and some of them were subjected to cluster analysis. The Partitioning Around Medoid algorithm was used to cluster 50 inbred lines from chosen phenotypes. Cluster validation was then carried out in a subsequent experiment by testing the statistically significant differences between chosen inbred lines and tolerant and susceptible clusters. According to the analysis, 4 clusters with different numbers of inbred lines were obtained. Lines in cluster no. 3 showed the most tolerance compared with the other clusters. In contrast, individuals in cluster no. 1 were the most susceptible. The results of cluster validation in another year also supported this cluster result. Therefore, we concluded that the clustering method was an efficient way to differentiate tolerant and susceptible inbred lines. Furthermore, the results suggested that plant height, tassel size, spikelet density, days to silking, and anthesis-silking interval were secondary traits that could be used in selection for drought tolerance in maize. Keywords: cluster analysis; partitioning around medoid; ordination analysis; inbred line collection; drought tolerance *Corresponding author: Tel.: (+66) 53873630 Fax: (+66) 53498168 E-mail: pattama_h@mju.ac.th
      PubDate: 2022-04-28
       
  • Improving Multi-label Classification Using Feature Reconstruction Methods

    • Authors: Worawith Sangkatip, Phatthanaphong Chomphuwiset*
      Pages: 10.55003/c - 10.55003/c
      Abstract: Multi-label classification (MLC) is a supervised classification method that allows for a data instance with more than one class label (or target). Solving MLC is still a challenging task. MLC can potentially generate complex decision boundaries as the method is a non-mutual exclusive classification method. Recently, many techniques have been proposed to cope with the complexity of MLC problems, such as the Problem transform method (PTM), the Adaptation method (AM), and the Ensemble method (EM). These techniques can generally produce good results with certain datasets. However, they have poor classification performance when the number of possible class-labels is larger, even if the dataset is well-presented (high density). The aim of this work was to solve the MLC problems by performing a feature reconstruction process on the original data features. The proposed feature reconstruction method generates a set of compact features from the original data instances. AutoEncoder is deployed to learn and encode the features of the data (as the constructed feature steps) before they are classified by learning algorithms (or classifiers). We conducted experiments using different multi-label classifiers based on and around PTM, AM, and EM, on the set of the standard dataset. The results from the experiments demonstrated that the proposed feature reconstruction technique provides promising classification results, especially with high-density data. Keywords: multi-label classification; multi-label feature transformation; feature engineering; high density data; feature reconstruction *Corresponding author: E-mail: Phatthanaphong.c@msu.ac.th
      PubDate: 2022-06-29
       
  • Energy Distribution Functions of Ions Generated by a Circular-type Anode
           Layer Ion Source

    • Authors: Nopphon Saowiang, Nitisak Pasaja, Phitsanu Poolcharuansin*
      Pages: 11 pages - 11 pages
      Abstract: An anode layer ion source, or an ALIS, is classified as a gridless ion source that produces a high-energy ion beam for either surface etching or thin film deposition. In the present work, the energy distribution functions of the ions generated in a circular ALIS were measured using a retarding field energy analyzer (RFA). Consequently, the average density and energy of the ions arriving at the ground surface were determined for the given range of process parameters. The IEDFs show two different groups of ions, namely, a narrow low energy group and a broad high energy group. The low-energy ions are probably generated in the background plasma and accelerated via the cathode sheath adjacent to the RFA. High-energy ions, on the other hand, are possibly generated in the discharge channel and gain an energy of up to 0.7eVanode through the anode sheath. The variations in average ion energies and densities as a function of process conditions could be due to the potential profile between the source and the ground surface. Keywords: ion energy distribution function; retarding field energy analyzer; anode layer ion source; anode sheath; cathode sheath *Corresponding author: E-mail: phitsanu.p@msu.ac.th
      PubDate: 2022-06-13
       
  • Development of Rat Meat Detection Using Mt-atp6 Rattus norvegicus Gene
           Genetic Marker

    • Authors: Maria Sihotang*, Alfi Sophian, Maria Purba, Yulin Wilasti
      Pages: 12 pages - 12 pages
      Abstract: An empirical test using the real-time PCR method to detect food contamination with rat meat (Rattus norvegicus) was conducted. The aims of this study was to provide information on new genetic markers that can be used to detect rat DNA. Detection of rat DNA in meatballs using the genetic marker of the Mt-atp6 (mitochondrial encoded ATP synthase membrane subunit 6) Rattus norvegicus gene was carried out using meatballs containing rat meat. Primers and probes were designed using Primer3Plus and then analyzed for in silico specificity using Primer-BLAST and Nucleotide-BLAST. Forward primer (5'-ACACCA AAAGGACGAACCTG-3'), reverse primer (5'- AGAATTACGGCTCCT GCTCA-3'), and probe (5'-[VIC]-TTCTAGGGCTTCTTCCCCAT-[QSY]-3') with a target size of 161 bp, were successfully designed. The results of empirical validation with laboratory experiments showed that the primer and probe pair can detect Rattus norvegicus specifically. Keywords: rat; Rattus norvegicus; detection; Mt-atp6; real-time PCR *Corresponding author: Tel.: (+62) 81343090080 E-mail: maria.arieni@pom.go.id
      PubDate: 2022-06-13
       
  • Personal Re-identification Using Incremental Dynamic Time Warping
           Algorithm and Body Measurement

    • Authors: Wisrut Kwankhoom*, Paisarn Muneesawang
      Pages: 13 pages - 13 pages
      Abstract: Identification of unique individuals is being extensively used in security and surveillance. Gait recognition has caught the attention of computer vision researchers. This interest has been stimulated by the development of systems to automatically identify individuals. This paper presents a gait gesture recognition algorithm, using Incremental Dynamic Time Warping (IDTW) with a body measurement technique that identifies personal gait patterns recorded on video via Microsoft’s Kinect® 3D depth-sensing camera. We used the height of a person to further clarify the recognition and accurate identification of the individual. The initial results demonstrated 81.25% accuracy with our gait and height recognition algorithm. This recognition technique is ideal for high-level security requirements. Keywords: Biometrics; Personal re-identification; Gait recognition; IDTW; Kinect sensor *Corresponding author: Tel.: (+66) 862020656 Fax: (+66) 55964005 E-mail: wisrutk57@nu.ac.th
      PubDate: 2022-06-24
       
  • Evaluation of Coating Ability of TiO2 Nanoparticles onto Aluminum Alloy
           Sheet by Physicochemical Analysis

    • Authors: Khatcharin Wetchakun*, Natda Wetchakun
      Pages: 13 pages - 13 pages
      Abstract: TiO2 nanoparticle films were successively coated onto aluminum (Al) alloy sheet using a coating technique at 150°C for 5 h. This was a chemical sintering method, integrated with Al/TiO2/Al sandwich coupling and used weak acid as a binder. To evaluate the coating ability of the TiO2 nanoparticles on the aluminum alloy sheet, the physicochemical characteristics of the film samples were analyzed by means of SEM-EDS, FT-IR and XRD. The TiO2 films prepared by the coating technique at 150°C for 5 h were compared with TiO2 films prepared by the doctor-blade technique at 500°C for 10 min using two different organics as binders. The results of the physicochemical analysis indicated that the coating technique at 150°C for 5 h provided superior coating ability of TiO2 nanoparticles onto aluminum alloy sheet than the doctor-blade technique. This may have been because of reduction of the thermal gradient at the TiO2 interface, which affected the relaxation of internal and external stresses on the TiO2 film on the aluminum alloy substrate. In this work, the TiO2 film prepared by chemical sintering method, integrated with Al/TiO2/Al sandwich coupling at 150°C for 5 h using weak acid mixed with 5 wt.% ammonia as a binder proved to produce the optimum TiO2 film; however, film thickness control using the coating technique at 150°C for 5 h still needs to be developed Keywords: aluminum; chemical sintering; wet coating; doctor-blade; thin film; titanium dioxide *Corresponding author: Tel.: (+66) 45352000-29 Fax: (+66) 45352070 E-mail: khatcharin.w@ubru.ac.th
      PubDate: 2022-06-13
       
  • Fungal Contamination and Characterization of Aspergillus flavus on Poultry
           Feeds and their Ingredients in North Sumatera

    • Authors: Kiki Nurtjahja*, Yurnaliza, Aditiya Bungsu; , Juwita Esterina Silalahi, Jesica Simanullang, Betriana Novi Lenta Gultom
      Pages: 13 pages - 13 pages
      Abstract: Poultry feeds mainly consist of cereal grains and crops that are vulnerable to fungal infection. Improper handling of the feeds increases spoilage and contamination by aflatoxigenic fungi. The aim of this study was to determine fungal contamination including characterization of toxigenic and non-toxigenic Aspergillus flavus strains in poultry feed and its ingredients. We collected 200 composite samples of compound poultry feeds and their ingredients sold by retailers at traditional markets. The fungal population was enumerated using a dilution followed by the pour plate in dichloran 18% glycerol agar medium. All isolated A. flavus were identified by culture technique and molecular approach. Aflatoxin production was determined in 10% coconut agar medium with thin layer chromatography. Regulatory (aflR) and structural (nor-1, ver-1, omt-1) genes of A. flavus strains were isolated using four sets of primers (aflR, nor-1, ver-1, omt-1). We found that all feeds were infected by fungi. Aspergillus chevalieri was the most found in all feeds, particularl on chick starter. Of the 200 samples of compound and poultry feed ingredients, 57 isolates of A. flavus were examined and 16 of them (28%) were toxigenic, each strain producing aflatoxin B1 from <3.01 to 35.50 ppb. Among feeds, layer finisher, pellet starter and grain corn were the most infected by toxigenic A. flavus, respectively. The contamination occurred on feeds that contained corn as the main compound. Routine analysis of compound poultry feeds and their ingredients for aflatoxigenic fungi particularly A. flavus is compulsory. Keywords: Aspergillus flavus; aflatoxin; fungal population; poultry feeds; non-toxigenic *Corresponding author: Tel.: (+062) 1533178071 Fax 0618214290 E-mail: kiki2@usu.ac.id
      PubDate: 2022-05-18
       
  • Modeling and Forecasting of Sugarcane Production in South Asian Countries

    • Authors: Pradeep Mishra*, Khder Mohammed Alakkari, Achal Lama, Soumik Ray, Monika Singh, Claris Shoko, Mostafa Abotaleb, Abdullah Mohammad Ghazi Al khatib, Kadir Karakaya
      Pages: 15 pages - 15 pages
      Abstract: Sugarcane industry is of crucial importance to the South Asian countries. These countries depend heavily on agriculture and the sugarcane industry has immense potential to contribute towards its economic development. Hence, the precise and timely forecast of sugarcane production is of concern for farmers, policy makers and other stakeholders. In this manuscript, we strived to forecast the production and growth rate of this important commodity using standard statistical approaches. The ARIMA (Auto Regressive Integrated Moving Average) and ETS (Exponential Smoothing) models were applied and compared on the basis of their forecasting efficiency for South Asia countries. This study also investigated the trends in sugarcane production in the region and studies the causes of the decline in production of sugarcane in Sri Lanka and Bangladesh. Furthermore, the expected production for following 7 years was computed using both models. In addition, we also calculated the projected growth rates of sugarcane production of South Asian countries over the years 2020-2027. Keywords: ARIMA; ETS; forecasting; policy; sugarcane production *Corresponding author: Tel.: (+91) 9560073489                                              E-mail: pradeepjnkvv@gmail.com
      PubDate: 2022-04-28
       
  • An Integrated Factor Analysis-Technique for Order Preference by Similarity
           to Ideal Solution for Location Decision in ASEAN Region: A Case Study of
           Thai Fabric Manufacturing Plant

    • Authors: Walailak Atthirawong*, Wariya Panprung, Puntipa Wanitjirattikal
      Pages: 16 pages - 16 pages
      Abstract: In this paper, we propose an integrated model for selecting a suitable location for fabric manufacturing plants in the ASEAN region. In the first phase, Cambodia, Vietnam and Indonesia were determined as candidate locations for evaluation from the screening process. In this regard, key criteria influencing location decisions were derived using factor analysis of responses extracted from questionnaires. In the second phase, criterion weights were calculated using the rank of centroid (ROC) method. Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) was then used to prioritize three location alternatives, and sensitivity analysis was also employed to verify the stability of the method. Based on TOPSIS method, Vietnam was the preferred location, followed by Indonesia while Cambodia was not recommended. Sensitivity analysis also showed that the proposed model was valid. The findings from this study provided references for enterprises engaged in international location decision making. The results can help them better understand the decision-making process and identify key criteria that can influence location decisions internationally. Keywords: exploratory factor analysis; location selection; TOPSIS; fabric manufacturing plant; ROC; sensitivity analysis *Corresponding author: Tel.: (+669)-675-0621, Fax: (+662)-329-8426 E-mail: walailaknoi@gmail.com
      PubDate: 2022-06-24
       
  • Assessment of Hydrocarbon Pollution in Groundwater Using Electrical
           Resistivity Method

    • Authors: Lukumon Adeoti, Geraldine Anukwu*, Saheed Ademoye, Joseph Adegbite, Emmanuel Adigun, Oluwakemi Adeogun
      Pages: 18 pages - 18 pages
      Abstract: Hydrocarbon contamination of the groundwater system is a problem facing residents of Ejigbo, Lagos, Southwestern Nigeria. The area hosts the busiest satellite petroleum depots in Nigeria, and residents have attributed pollution of the groundwater system to hydrocarbon spills from possible pipeline leakages. This study aimed to identify and characterize the source and extent of the groundwater system contamination in the study area. The electrical resistivity method was adopted, comprising 2D Electrical resistivity imaging (ERI) and Vertical Electric Sounding (VES) techniques. Data acquired were processed and analyzed to obtain geoelectric sections, longitudinal conductance map and 2D ERI sections for the study area. Three distinct geoelectric zones were delineated, with the intermediate zone identified as the contaminated shallow aquiferous unit. This unit's resistivity values ranged from about 400 - 5000 ohm-m at a depth of 5 - 35 m. On the 2D ERI sections, possible locations of pipeline leakages were identified. On some ERI sections, a linear feature with resistivity value less than 300 ohm-m was observed from the surface down the depth of the entire section, truncating the horizontal flow of the contaminated unit. Generally, the results indicate that the contamination of the shallow aquifer in the area is widespread and mitigation measures should be urgently undertaken. Keywords: leakages; contamination; geoelectric sections; longitudinal conductance; aquifer; pipeline; groundwater system *Corresponding author: Tel.: (+234) 905 638 6645 E-mail: ganukwu@unilag.edu.ng
      PubDate: 2022-05-17
       
  • Modeling a Simple Single-phase Grid-connected Photovoltaic System Using
           Negative Conductance of Solar Cells

    • Authors: Nuttakrit Somdock*, Chatrpol Pakasiri, Aparpron Sakulkalavek, Wichit Sirichote
      Pages: 22 pages - 22 pages
      Abstract: This paper presents the simulation of a simple single-phase grid-connected photovoltaic (PV) system using the PSPICE model. The modeling system consists of a PV string, a single-phase current source inverter (CSI), load, and a grid voltage source. The system uses the PV string as the current source. The single-phase CSI was controlled by the grid AC voltage. The operation of the system employs the negative conductance characteristics of the PV string. We studied the voltage and current waveform at the inverter output terminal, the current waveform at the load, the AC power with various open-circuit voltages and temperatures of the PV string. The result showed the current waveform at the inverter output terminal follows the I-V characteristics of the PV string. The current waveform at the load depends on its impedance characteristics. The AC power increased with the open circuit voltage. We found that the maximum efficiency of the AC power conversion system was 63.3% at the peak of the AC voltage source, which was equal to the maximum power voltage of the PV string. In addition, the prototype was built for testing and testing verified the simulation results. The experimental results showed the current waveform at the inverter terminal and load were similar to the simulation results. Keywords: grid-connected photovoltaic system; solar cell; negative conductance; simulations *Corresponding author: Tel.: (+66) 972528395 Fax: (+66) 3298412 E-mail: nuttakrit.so@kmitl.ac.th
      PubDate: 2022-06-14
       
  • Chemostratigraphy of Two Wells in Niger Delta Basin: An Integrated
           Approach to Stratigraphic Study

    • Authors: Kiamuke Itiowe*, Frank Adebayo Lucas, Charles Ugwu Ugwueze, Osaki Lawson-Jack
      Pages: 27 pages - 27 pages
      Abstract: Chemostratigraphic characterization and correlation was carried out on two wells in the Niger Delta with the aim to integrate chemostratigraphic data with already existing biostratigraphic information from the Niger Delta. Shale cutting samples taken within the interval of interest from both wells were subjected to inorganic geochemical and mineralogical analysis using energy dispersive x-ray fluorescence spectrometry (ED-XRF) and x-ray diffractometry, respectively. The key elements used for chemostratigraphic characterization and correlation for both wells were Al2O3, K2O, Na2O and Fe2O3. Four geochemical packages and three geochemical boundaries at depths of 8265ft, 9120ft and 10080ft were identified in #3 well, while two geochemical packages and one geochemical boundary at 4500ft were identified in the Sahaiawei-1 well. The primary mineralogical controls on the elemental variations identified in both wells were clay minerals (kaolinite, illite/muscovite, and chlorite), plagioclase, microcline, jarosite and pyrite. In this study, chemostratigraphic data was integrated with already existing biostratigraphic information, enabling the establishment of some informal geochemical markers in the Northern Delta and Greater Ughelli depobelts. Our research results will improve on the inorganic geochemistry and chronostratigraphic charts of the Niger Delta, and it will in future facilitate seismic interpretation and the identification of the Niger Delta petroleum play elements. Keywords: geochemical characterization; elemental chemostratigraphy; geochemical boundaries; inorganic geochemistry; Niger Delta Bain *Corresponding author: E-mail: kiamukeitiowe@yahoo.com
      PubDate: 2022-06-20
       
 
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