Subjects -> ENGINEERING (Total: 2844 journals)
    - CHEMICAL ENGINEERING (259 journals)
    - CIVIL ENGINEERING (255 journals)
    - ELECTRICAL ENGINEERING (182 journals)
    - ENGINEERING (1420 journals)
    - ENGINEERING MECHANICS AND MATERIALS (454 journals)
    - HYDRAULIC ENGINEERING (60 journals)
    - INDUSTRIAL ENGINEERING (101 journals)
    - MECHANICAL ENGINEERING (113 journals)

ENGINEERING (1420 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 9)
3D Research     Hybrid Journal   (Followers: 22)
AAPG Bulletin     Hybrid Journal   (Followers: 11)
Abstract and Applied Analysis     Open Access   (Followers: 4)
Aceh International Journal of Science and Technology     Open Access   (Followers: 9)
ACS Nano     Hybrid Journal   (Followers: 448)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 10)
Acta Nova     Open Access   (Followers: 1)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 4)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access   (Followers: 1)
Active and Passive Electronic Components     Open Access   (Followers: 8)
Adaptive Behavior     Hybrid Journal   (Followers: 9)
Adsorption     Hybrid Journal   (Followers: 5)
Advanced Energy and Sustainability Research     Open Access   (Followers: 7)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 14)
Advanced Engineering Research     Open Access  
Advanced Journal of Graduate Research     Open Access   (Followers: 4)
Advanced Quantum Technologies     Hybrid Journal   (Followers: 1)
Advanced Science     Open Access   (Followers: 13)
Advanced Science Focus     Free   (Followers: 7)
Advanced Science Letters     Full-text available via subscription   (Followers: 13)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 11)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 20)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advances in Catalysis     Full-text available via subscription   (Followers: 8)
Advances in Complex Systems     Hybrid Journal   (Followers: 12)
Advances in Engineering Software     Hybrid Journal   (Followers: 31)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 20)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 22)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 30)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 27)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 10)
Advances in Natural Sciences : Nanoscience and Nanotechnology     Open Access   (Followers: 36)
Advances in Operations Research     Open Access   (Followers: 14)
Advances in OptoElectronics     Open Access   (Followers: 6)
Advances in Physics Theories and Applications     Open Access   (Followers: 21)
Advances in Polymer Science     Hybrid Journal   (Followers: 53)
Advances in Porous Media     Full-text available via subscription   (Followers: 6)
Advances in Remote Sensing     Open Access   (Followers: 58)
Advances in Science and Research (ASR)     Open Access   (Followers: 8)
Aerobiologia     Hybrid Journal   (Followers: 4)
Aerospace Systems     Hybrid Journal   (Followers: 10)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 8)
AIChE Journal     Hybrid Journal   (Followers: 38)
Ain Shams Engineering Journal     Open Access   (Followers: 7)
Al-Nahrain Journal for Engineering Sciences     Open Access  
Al-Qadisiya Journal for Engineering Sciences     Open Access   (Followers: 2)
AL-Rafdain Engineering Journal     Open Access   (Followers: 3)
Alexandria Engineering Journal     Open Access   (Followers: 3)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 12)
American Journal of Engineering Education     Open Access   (Followers: 20)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 31)
Annals of Civil and Environmental Engineering     Open Access   (Followers: 3)
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 6)
Annals of Regional Science     Hybrid Journal   (Followers: 10)
Annals of Science     Hybrid Journal   (Followers: 10)
Annual Journal of Technical University of Varna     Open Access   (Followers: 1)
Antarctic Science     Hybrid Journal   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 3)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 2)
Applications in Energy and Combustion Science     Open Access   (Followers: 2)
Applications in Engineering Science     Open Access   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 8)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 22)
Applied Clay Science     Hybrid Journal   (Followers: 6)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 16)
Applied Engineering Letters     Open Access   (Followers: 4)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 11)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 6)
Applied Physics Research     Open Access   (Followers: 7)
Applied Sciences     Open Access   (Followers: 6)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 6)
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 6)
Archives of Thermodynamics     Open Access   (Followers: 13)
Arctic     Open Access   (Followers: 7)
Arid Zone Journal of Engineering, Technology and Environment     Open Access   (Followers: 2)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access   (Followers: 1)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 2)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 9)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 7)
Assembly Automation     Hybrid Journal   (Followers: 2)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
AURUM : Mühendislik Sistemleri ve Mimarlık Dergisi = Aurum Journal of Engineering Systems and Architecture     Open Access   (Followers: 1)
Australasian Journal of Engineering Education     Hybrid Journal   (Followers: 3)
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Hybrid Journal   (Followers: 2)
Autocracy : Jurnal Otomasi, Kendali, dan Aplikasi Industri     Open Access  
Automotive and Engine Technology     Hybrid Journal  
Automotive Experiences     Open Access  
Automotive Innovation     Hybrid Journal   (Followers: 1)
Avances en Ciencias e Ingenierías     Open Access  
Avances: Investigación en Ingeniería     Open Access   (Followers: 6)
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 2)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 6)
Batteries     Open Access   (Followers: 11)
Batteries & Supercaps     Hybrid Journal   (Followers: 7)
Bautechnik     Hybrid Journal   (Followers: 3)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 29)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
Beyond : Undergraduate Research Journal     Open Access  
Bhakti Persada : Jurnal Aplikasi IPTEKS     Open Access  
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 14)
Biomedical Engineering     Hybrid Journal   (Followers: 15)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 7)
Biomicrofluidics     Open Access   (Followers: 7)
Biotechnology Progress     Hybrid Journal   (Followers: 44)
Black Sea Journal of Engineering and Science     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 13)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 15)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers Droit, Sciences & Technologies     Open Access   (Followers: 1)
Calphad     Hybrid Journal   (Followers: 2)
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 30)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 50)
Carbon Resources Conversion     Open Access   (Followers: 3)
Carpathian Journal of Electronic and Computer Engineering     Open Access  
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Thermal Engineering     Open Access   (Followers: 8)
Catalysis Communications     Hybrid Journal   (Followers: 7)
Catalysis Letters     Hybrid Journal   (Followers: 3)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 9)
Catalysis Science and Technology     Hybrid Journal   (Followers: 13)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysis Today     Hybrid Journal   (Followers: 8)
CEAS Space Journal     Hybrid Journal   (Followers: 6)
Cell Reports Physical Science     Open Access  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 2)
Central European Journal of Engineering     Hybrid Journal  
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 3)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chaos, Solitons & Fractals : X     Open Access   (Followers: 1)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 3)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Journal of Population, Resources and Environment     Open Access  
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 2)
CienciaUAT     Open Access   (Followers: 1)
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Hybrid Journal   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Hybrid Journal   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 27)
Clay Minerals     Hybrid Journal   (Followers: 9)
Coal Science and Technology     Full-text available via subscription   (Followers: 4)
Coastal Engineering     Hybrid Journal   (Followers: 14)
Coastal Engineering Journal     Hybrid Journal   (Followers: 9)
Coastal Engineering Proceedings : Proceedings of the International Conference on Coastal Engineering     Open Access   (Followers: 2)
Coastal Management     Hybrid Journal   (Followers: 30)
Coatings     Open Access   (Followers: 4)
Cogent Engineering     Open Access   (Followers: 3)
Cognitive Computation     Hybrid Journal   (Followers: 3)
Color Research & Application     Hybrid Journal   (Followers: 4)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 17)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 20)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 28)
Composite Interfaces     Hybrid Journal   (Followers: 10)
Composite Structures     Hybrid Journal   (Followers: 334)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 276)
Composites Part B : Engineering     Hybrid Journal   (Followers: 311)
Composites Part C : Open Access     Open Access   (Followers: 3)
Composites Science and Technology     Hybrid Journal   (Followers: 245)
Comptes Rendus : Mécanique     Open Access   (Followers: 2)
Computation     Open Access   (Followers: 1)
Computational Geosciences     Hybrid Journal   (Followers: 20)
Computational Optimization and Applications     Hybrid Journal   (Followers: 11)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 20)

        1 2 3 4 5 6 7 8 | Last

Similar Journals
Journal Cover
Applied Nanoscience
Number of Followers: 11  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2190-5509 - ISSN (Online) 2190-5517
Published by SpringerOpen Homepage  [260 journals]
  • Novel ethanol sensing via clad modified fiber with SnO2:CuO with wireless
           adaptability

    • Abstract: Indoor pollution has of late risen considerably which leads to several adverse health effects. To combat this gradual rise in indoor pollution, there has been various developments. Accordingly, the present work throws light on the development of a novel sensor with the capacity for precise detection of volatile gas. The sensor comprises of clad modified optical fiber with SnO2:Cuo. With a limit of detection (LOD) of 10 ppm, the current sensor outperforms other sensors already reported in literatures. Ensuring a suitable tweaking with Arduino, the sensor gets laced with the provision of wireless adaptability so that readout can be obtained in remote conditions too.
      PubDate: 2021-10-13
       
  • Preparation of silver chloride nanoparticles using human urine

    • Abstract: This work presents a new methodology for preparing silver chloride nanoparticles (AgCl NPs) using human urine. The XRD and EDS results confirmed the formation of AgCl NPs without any other impurities. The FESEM results displayed the formation of clusters of spherical AgCl NPs with multiple Nano-diameters. The study of optical properties corresponds to the behavior of AgCl NPs in the visible region. The results showed that the sample has an energy gap of (Eg) 3.25 eV. Therefore, the author suggests that the results of the current work open a broad horizon for the employment of human urine in various applications.
      PubDate: 2021-10-11
       
  • Enhancement of road pavement material using conventional and nano-crude
           oil fly ash

    • Abstract: This paper presents the use of crude oil ash in asphalt flexible pavement and concrete rigid pavement. Conventional micro-size fly ash produced from burning crude oil in Jizan electrical power plant in Saudi Arabia was used in this study. The size of conventional crude oil ash waste reduced from micro-scale to nano-scale using ball-milling techniques. The first series of testing investigate the development of flexible pavement using asphalt bituminous AC60/70 incorporated conventional and nano-crude oil fly ash waste. The percentage of conventional and nano-ash used in asphalt mixes was varied from 0 to 15% of asphalt binder. The use of nano-fly ash increases the rutting factor by 0%, 33%, 61% and 38% at 0%, 5%, 10% and 15% nano-fly ash content, respectively. The nano-fly ash improves the rutting factors and bearing load capacity of flexible pavement mixes more than the control mix and mixes containing conventional micro-fly ash. The second series of testing investigates the use of nano-fly ash in rigid pavement asphalt concrete. Conventional and nano-fly ash replaced cement content in concrete material at 0%, 5%, 10%, and 15%. Concrete material incorporated nano-fly ash shows higher compressive strength and lower absorption compared to concrete control sample and concrete containing conventional micro-fly ash. The strength of concrete incorporated nano-fly ash increases by 14.8%, while absorption of concrete improves by 20.1% at 10% nano-fly ash content. The optimum nano-fly ash content was 10% to achieve the highest performance of both pavement materials. The use of nano-crude oil fly ash improves the performance of both pavement materials and helps in reducing the cost of repair in road and highway construction. Moreover, the use of nano-fly ash in paving materials can help in the recycling of this toxic waste to produce sustainable and environmentally friendly road construction materials.
      PubDate: 2021-10-11
       
  • Synthesis of novel lanthanum-doped zinc oxide nanoparticles and their
           application for wastewater treatment

    • Abstract: Wastewater treatment via photocatalytic activity is one of the most economical and environment-friendly method. However, obtaining an efficient photocatalyst remains a challenge for researchers in this most emerging field. In this study, pure and lanthnum (La)-(1%,2% and 3%) doped zinc oxide nanoparticles (ZnO-NPs) were synthesized via sol gel chemical technique to investigate their optical, chemical and structural properties. The synthesized NPs were characterized by using UV/VIS, SEM, EDS, XRD, FTIR, PL and Raman spectroscopy. Such nanoparticles (NPs) have been used as a photocatalyst for the degradation of rhodamine B (RhB) dye. Quite interestingly, the La-doped ZnO-NPs show unique results associated with the fact that by varying the concentration of dopant, the particle size is reduced (28.09 ± 0.04 nm to 15.85 ± 0.02 nm), which leads to a decrease in band gap, i.e., shifting toward visible (3.26 eV to 3.06 eV). This attributes to the fact that doping also helps to reduce electron–hole pair recombination rate during photocatalysis, which makes La-doped ZnO-NPs the most potential photocatalyst against RhB dye. We report a maximum degradation efficiency of 84.97% in 150 min observed from La0.02Zn0.98O, which reveals that 2% doping of La is the optimal value whereas further increase in concentration, i.e., at 3% (La) band gap increases whereas degradation efficiency reduces from 84.97 to 73.37%.
      PubDate: 2021-10-11
       
  • Phytochemical profile and larvicidal activity of aqueous extract of Ocimum
           americanum against mosquito vectors

    • Abstract: The primary goal of this research was to evaluate the phytochemicals, including bioactive components of Ocimum americanum extracts and assess their larvicidal potential against 3rd and 4th instar larvae of Aedes aegypti, Anopheles stephensi, and Culex quinquefasciatus. The aqueous extraction process on O. americanum provides higher yield (9.61 ± 0.11%) and a significant volume of phytochemicals (tannins, saponins, terpenoids, flavonoids, alkaloids, protein, and carbohydrate) than other solvents (methanol, ethanol, acetone, petroleum ether, and chloroform) extracts. Fourier-transform infrared spectroscopy and high-performance liquid chromatography analyses revealed about eight predominant phytochemicals/functional groups in O. americanum aqueous extract. Surprisingly, in gas chromatography–mass spectrometry analysis, about 30 bioactive components were found in the aqueous extract of O. americanum, the majority of which had previously been identified as medicinally valuable bioactive components. Furthermore, these bioactive components containing aqueous extract demonstrated significant larvicidal activity against 3rd and 4th instar larvae of A. aegypti, An. stephensi, and C. quinquefasciatus after 24 h of treatment at concentrations ranging from 35 to 50 mg mL−1. Thus, their outstanding larvicidal potential on 3rd and 4th instar larvae, the phytochemicals present in the aqueous extract of O. americanum could be used to control mosquito duplication and vector-borne diseases.
      PubDate: 2021-10-08
       
  • Ag sensitized ZnO/SnO2 heterostructures for photocatalytic decontamination
           of water

    • Abstract: In the present work, ZnO/SnO2 is sensitized using Ag to improve the photocatalytic properties. To uncover the chemical state, phases, and morphology, samples are characterized using the X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM), X-Ray Photoelectron Spectroscopy (XPS), High-Resolution Transmission Electron Microscope (HRTEM), and UV–Visible Diffuse Reflectance Spectroscopy (UV-DRS) techniques. The XRD and HRTEM showed good crystallinity of samples and the presence of the desired component, respectively. The uniform dispersion of Ag nanoparticles is confirmed by the FESEM analysis and the EDX study confirms the presence of Ag, Zn, Sn, and O. The XPS analysis showed that all the components are present in the desired ionic state. The sample containing 7 wt% silver content showed the highest photocatalytic efficiency against both the pollutants and complete degradation of dye and pesticide is achieved in 100 min and 45 min, respectively. The excellent performance of Ag@ZnO/SnO2 nanomaterials is attributed to the surface plasmon effect and charge transfer between the semiconductors. The synthesized materials will be useful in the development of a cost-effective water purification system.
      PubDate: 2021-10-08
       
  • Antioxidant, antiproliferative and antihemolytic properties of
           phytofabricated silver nanoparticles using Simarouba glauca and Celastrus
           paniculatus extracts

    • Abstract: The present research work depicts a cinch and economical synthesis of silver nanoparticles (AgNPs) phytofabricated utilizing leaf extract of Simarouba glauca and aerial extract of Celastrus paniculatus. Fourier transform infrared spectroscopy (FTIR) analysis displayed the synthesized AgNPs capped with bio-constituents existent in these medicinal plants marked by their functional groups. The morphological features of prepared NPs were characterized by employing X-ray Diffraction (XRD), Scanning Electron Microscope with Energy Dispersive spectra (SEM–EDX) and Transmission Electron Microscope (TEM) analysis illustrated their spherical shape and ~ 40 nm particle size. Green synthesized AgNPs were assessed for their antioxidant potential by free radical scavenging assays; and antibacterial efficacy. The phytofabricated AgNPs were found to induce cell growth arrest in MCF-7 and HT-29 cell lines with an IC50 value of 70.84 ± 0.67 and 158.24 ± 0.89 µg/mL for AgNPs prepared using S. glauca (Ag-SG) while 207.19 ± 0.64 and 221.22 ± 0.57 µg/mL for AgNPs synthesized using C. paniculatus (Ag-CP) in dose-proportional relation. The same samples could not effectively prohibit the growth of immortalized normal human breast epithelial cell lines (MCF-10A). The cytotoxicity induced by apoptosis was further confirmed by fluorescent images. The synthesized nanoparticles also demonstrated less hemolysis efficiency and are evidenced by SEM images. The analyses indicate the potent antioxidant and antiproliferative capacity of stable green synthesized AgNPs derived from the mentioned exorbitant curative herbs.
      PubDate: 2021-10-01
       
  • Expression and preliminary characterization of the potential vaccine
           candidate LipL32 of leptospirosis

    • Abstract: Leptospirosis is a globally re-emerging infectious disease mainly for mammals. The infection is caused by the spirochete Gram-negative bacterium Leptospira interrogans, which affects animals and humans worldwide. In our previous studies, recombinant protein production has been obtained from the bacterial expression system. In this study, we have investigated the over expression of LipL32 and hGMCSF genes into yeast expression system for obtaining a high yield of recombinant protein production. Here, we described the yeast expression studies with several applications such as protein folding, fast growth, and post-translational modification. The expression studies were carried out in a novel protein expression system, the methylotrophic yeast Pichia pastoris KM71 strain. The LipL32, Green fluorescent protein (EGFP), and human granulocyte–macrophage colony-stimulating factor (hGMCSF) genes were cloned into pPIC9 yeast expression vector. The recombinant clones of pPIC9-EGFP-LipL32 and pPIC9-EGFP-hGMCSF-LipL32 were transformed into Pichia pastoris KM71 strain by electroporation. Media optimization and other physiological characters were studied for the transformed recombinant protein. The protein was then purified using a Ni–NTA column; meanwhile, the recombinant DNA constructs contain His-tag at the C- terminal end. Finally, the intracellular EGFP expression of pPIC9-EGFP-LipL32, and pPIC9-EGFP-hGMCSF-LipL32 in Pichia pastoris KM71 strain was confirmed by fluorescence microscopic analysis. Protein–protein dockings were done to study LipL32-Adjuvant (hGMCSF, hIgGFC, and hC3d) interactions. Furthermore, this docking analysis was shown better interaction between LipL32, and hGMCSF, which is also used for the enhanced vaccine potential against leptospirosis.
      PubDate: 2021-09-30
       
  • Nigella sativa L. seeds extract assisted synthesis of silver nanoparticles
           and their antibacterial and catalytic performance

    • Abstract: In this research work, a green synthesis method of using a Nigella sativa L. seeds extract as a reductant was adopted for the silver nanoparticles (AgNP) production. The AgNP were produced using a 5 mM silver nitrate mixed with the seeds extract at 25 °C and at 60 °C. It was observed that the AgNP production rate significantly increased at high temperatures. The obtained AgNP were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques. SEM depicted an average particle size (42 ± 15 nm) of synthesized AgNP. XRD results further augmented the SEM data and indicated definite crystallinic peaks for synthesized AgNP. The prepared Nigella sativa L. extract assisted AgNP (N.S./AgNP) were further used in the reduction of the MB and 4-nitroaniline dyes as well as in antibacterial studies. It was found that the AgNP successfully transformed the 4-NA and MB to their reductive compounds with high conversion rates of 0.1021 min−1 and 0.4197 min−1, respectively. The antibacterial results showed that the N.S./AgNP have good killing properties against Staphylococcus aureus, Klebsiella pneumonia and Pseudomonas aeruginosa bacteria.
      PubDate: 2021-09-30
       
  • A numerical comparison of circular and corrugation heat sink for laminar
           CuO–water nano-fluid flow and heat transfer enhancement

    • Abstract: Since the high heat has a bad effect on every electric coolant device performance in small spaces, enhance thermal systems became a challenge to achieve better performance. In the present study, investigate the forced heat transfer and laminar CuO–water nanofluid flow around the sinusoidal cylindrical and cylindrical heat sink, at Reynold number less than 700, and at a constant heat flux. Which is simulated numerically by Galerkin approach finite element methods FEM. The main purpose of the study is to drop the heat spam by enhancing the heat transfer coefficient of laminar flow in different channel types of special shape (corrugate cross-section) using nanofluid. Study the effect of hydraulic diameter of sinusoidal cylindrical to classify the channels depended on (Dh ≤ 3 mm). The new design of heat sink is employed “sinusoidal cylindrical heat sink” varied according to the amplitude values (λ) and the corrugation number (G). A digest of the findings, the best enhance at φ = 0.15%vol of 16.31% and 16.53% for G = 3 and G = 10, respectively. A great drop in wall temperature about 20.47 and 16.58 for λ = 20 of G = 3, and G = 10, respectively, as the volume fraction of CuO–water nanofluid increased at Re = 478 & q″ = 127.3 kW/m2, comparing with water. In conclusion, the sinusoidal heat sink of λ = 20 with CuO–H2O nanofluid of φ = 0.15%vol showed best enhance in heat transfer coefficient. Increased the corrugate number G led to a decrease in the friction factor and thermal resistance. Furthermore, using nanofluid led to reduce the surface wall temperature, the friction factor also the thermal resistance.
      PubDate: 2021-09-30
       
  • Enhancement of fuel properties of Manilkara zapota biodiesel blend by
           doping green-synthesized silver nanoparticles

    • Abstract: One of the best methods to enhance the fuel properties is by doping the green-synthesized nanoparticles. This method has emerged as the cost-effective and eco-friendly one with nano-additive to the diesel engine fuels. In this paper, the process of biodiesel preparation from the Manilkara zapota seed oil by transesterification method with the methanol as a solvent, KOH as a catalyst was discussed and the yield of biodiesel obtained was reported. The Manilkara zapota leaf extracts were used for the preparation of green-synthesized silver nanoparticles. The prepared silver nanoparticles were characterized by UV–visible spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy-dispersive X-ray analysis (EDAX) and Fourier transform infrared spectroscopy (FTIR). UV spectra of synthesized silver nanoparticles showed an absorbance peak of 462 nm. Both SEM and XRD confirmed the presence of silver nanoparticles and the size of particles in the range of 40–50 nm. The EDAX test results revealed the presence of silver nanoparticles at 3 keV. The FTIR result proved the absorption bands of synthesized silver nanoparticles between 3742 and 457 cm−1 and confirmed the presence of different biomolecules in the extracts of Manilkara zapota leaves that acted as capping and reducing agents during the synthesis of silver nanoparticles. In addition to that, the prepared Manilkara zapota biodiesel blended with diesel and doped with synthesized silver nanoparticles of different proportions (50 ppm and 100 ppm). The different test fuel blends such as B25, B50, B25D70 + AgNP50 ppm, B25D65 + AgNP100 ppm, B50D45 + AgNP 50 ppm and B50D40 + AgNP100 ppm were prepared. Finally, the different fuel properties like viscosity, density, calorific value and flashpoint of the test fuel samples were measured as per the American Society for Testing and Materials (ASTM) standard and compared the test results of the fuel blends with and without nanoparticles are presented in this paper. The viscosity of the test fuel blend (B25D65 + AgNP100ppm) significantly reduced by 27.95%, followed by 4.72% reduction in density, 16.36% improvement in calorific value and 64.81% reduction in flash point compared to B100.
      PubDate: 2021-09-30
       
  • Microsoft Azure active directory for next level authentication to provide
           a seamless single sign-on experience

    • Abstract: Authentication is crucial although if system which facilitates secure their networks by limiting access to protected resources such as networks, websites, network-based software, databases, and other computer systems or services to only authenticated users (or processes). In general, modern authentication protocols such as Security Assertion Markup Language 2.0 (SAML), WS-Fed, OAuth, and OpenID discourage apps from handling user credentials. The aim is to keep an app's authentication method and its functionality separate. Azure Active Directory (Azure AD) manages the login process to keep confidential data (such as passwords) out of the hands of websites and apps. This allows identity providers (IdP) like Azure AD to provide seamless single sign-on experiences, allow users to authenticate using factors other than passwords (phone, face, biometrics), and block or elevate authentication attempts if Azure AD detects, for example, that the user's account has been compromised or that the user is attempting to access an app from an untrusted location. The main goal of the work is Converting Visual Studio from ADAL to MSAL has allowed us to better support Conditional Access and Multi-factor Authentication and other new AAD features which benefit our customers. Visual Studio 2019 and the.NET Core SDK can be used to complete this work. The SAML request–response authentication workflow between these providers is checked to ensure that user login information is accurate and safe.
      PubDate: 2021-09-29
       
  • Electrochemical detection of cortisol on graphene quantum dots modified
           electrodes using a rationally truncated high affinity aptamer

    • Abstract: Stress nowadays is one of the major causes of various pathologies in humans. Monitoring of stress associated biomarker levels in biological fluids on demand can help in effective management of stress. Since cortisol has been recognised as a potential biomarker for stress, its detection can help in an appropriate therapeutic intervention or stress management. Various types of biosensors such as immunosensors, aptasensors, molecularly imprinted polymers and enzyme-linked based biosensors have been reported till now for the cortisol sensing. Out of all, aptasensors have shown various advantages over other sensors such as specificity, high room temperature stability, reproducibility, etc. Among various reported aptasensors, full-length aptamer (> 60-mer) has been used. However, only a portion of aptamer interact with its target, therefore, establishing its structure–activity relationship is vital for a biosensor to achieve an optimized performance. In the current work, we have rationally truncated already existing 61-mer aptamer sequence into its smaller variant with only 14 bases. Parent and truncated aptamers were immobilized on the graphene quantum dots modified electrodes for electrochemical biosensing of cortisol. Detection limits and cross-reactivities of both the aptamers were compared and it was found that truncated aptamer showed better results in terms of specificity. Though the limit of detection is same for both parent and truncated aptamers, i.e. 0.1 pg/ml but cross-reactivity from various structural analogues in sensing is reduced drastically in case of truncated variant. In brief, we are reporting a label-free electrochemical aptasensor utilizing the truncated aptamer (14-mer) that has remarkable limit of detection (0.1 pg/ml), high level of selectivity and reproducibility for the direct analysis of the cortisol.
      PubDate: 2021-09-28
       
  • Clinical effect of duloxetine on improving osteoporosis low back pain in
           older adults

    • Abstract: The aim of the study is to evaluate the clinical efficacy of duloxetine on improving osteoporosis low back pain. A total of 300 elderly patients with osteoporosis low back pain were included in the present study, including 98 males and 202 females, with an average age of 69.02 ± 5.58 years. They were randomly divided into the observation group (n = 150) and the control group (n = 150). Both groups were given bone nutritious supplements (vitamin D and calcium carbonate) for 1 year, but the observation group was also given duloxetine for 3 months. Pain, bone density, mechanical pain threshold, muscle strength, physical function, and quality of life of the two groups were followed up and compared. Overall, 97 cases in the observation group and 106 cases in the control group participated in the final follow-up visit. Three months after treatment, the average VAS score of low back pain in the control group was 3.49 ± 1.39 points, and the observation group was 1.70 ± 1.24 points. There was still a statistical difference (p < 0.05) after 1 year of follow-up. In the observation group, the mechanical pain threshold increased to 39.72 ± 3.13 g after 3 months of treatment. The bone mineral density increased by 0.06 g/L compared with the control group for 1 year of follow-up, and the SF-36 score was increased compared with the control group (p < 0.05). The stand-up time was shorter than that of the control group (p < 0.05). There was no statistical difference between the two groups in the test of handgrip strength and simple physical ability (p > 0.05). No more adverse reactions were observed in the observation group than in the control group (p > 0.05). Duloxetine has a proper relief effect on chronic low back pain in older adults with osteoporosis, and it can help improve pain sensitization and improve the quality of life without reducing bone density.
      PubDate: 2021-09-28
       
  • Impact of particulate pollutant emissions from combustion of civil
           briquettes on air quality

    • Abstract: When analyzing the spatial change law of granular pollutants, the traditional analysis methods have a single nature, which leads to deviations in the analysis results. Therefore, the new analysis method was proposed for the impact of particulate pollutant emissions from combustion of civil briquettes on air quality. This method uses spatial interpolation to construct an evaluation model. Based on the spatial correlation of pollutants, the spatial distribution characteristics of pollutants were extracted. The hypothesized pollution space was divided into the initial pollution area, the middle pollution diffusion area, and the end pollution attenuation area. The spatial variation law of granular pollutants after discharge treatment was obtained. According to the activity rate of the residual pollution particles, the adsorption of the pollution particles was calculated to determine the air quality level under the influence of emission control. The test results show that compared with the traditional analysis methods, the proposed analysis method is more comprehensive, and the deviation of the obtained analysis results is very small. It can be seen that the performance of this method is superior.
      PubDate: 2021-09-28
       
  • Synergism or antagonism in tribo-performance of nano-greases using
           combinations of nanoparticles of graphite and PTFE

    • Abstract: Nanoparticles (NPs) of solid lubricants (SLs) as solo particles have proved to be excellent anti-wear additives (AWAs), anti-friction additives (AFAs), and extreme-pressure additives (EPAs) for greases. However, hardly any efforts are made to investigate possible synergism/antagonism in the functioning of NPs when added in combination. Graphite is well known as very efficient AWA and AFA but less effective as EPA, whereas PTFE is more known as very efficient EPA and less efficient as AWA and AFA for greases. Hence, it was thought worthwhile to explore the potential of these two particles together as EPA, AWA, and AFA for possible synergism, using multiple combinations of NPs of PTFE (P) and graphite (G) in various amounts (0, 1, 2, 3, and 4 wt. %) keeping the total amount fixed at 4%. It was observed that combo-particles in typical amounts proved to show synergistic action as EPA and AWA. However, as AFA, they showed antagonistic behaviour. In the case of EP, the highest gain (100%) was recorded for combo-grease (1% G and 3% P). In the case of AW performance, all combo-greases showed synergism and showed almost similar benefits (52–62%, depending on the load). However, a clear antagonism was observed in AF performance, barring one combination (1% G and 3% P). The wear mechanism was discussed using various analytical techniques such as scanning electron microscopy (SEM), Raman spectroscopy, and X-ray photo-electron spectroscopy (XPS).
      PubDate: 2021-09-27
       
  • Synthesis of silver nanoparticles from wild and tissue cultured Ceropegia
           juncea plants and its antibacterial, anti-angiogenesis and cytotoxic
           activities

    • Abstract: In the current study, silver nanoparticles (AgNPs) have been synthesized from aqueous extracts of wild plants (WCJ) and tissue cultured plants (TCCJ) of Ceropegia juncea, which is an endangered medicinal plant. AgNPs were synthesized using this method and validated by UV–visible spectrophotometry, FTIR analysis, XRD measurements, EDX and SEM analysis. Visual observation of the UV/visible spectrum and UV–visible spectra of WCJ and TCCJ after they were treated with Ag precursors revealed the development of yellowish-brown and dark brown colors, respectively. FTIR analysis identified flavonoids and terpenoids as the compounds responsible for capping and stabilizing AgNPs. It is evident from the XRD results that the synthesized AgNPs are crystallized. The optical absorption peaks observed in the EDX samples of WCJ and TCCJ AgNPs were both approximately 3 keV indicating the presence of elemental silver. Furthermore, SEM analysis verified that WCJ and TCCJ AgNPs had sizes of approximately 3–32 μm and 8.28–13.82 μm, respectively. According to the results of anti-bacterial activity, both samples inhibited bacterial growth in a dose-dependent manner. WCJ and TCCJ AgNPs altered the vascular system, suppressing the creation of new blood vessels and causing distortions of existing vessels as detected in the angiogenesis study. AgNPs exhibited noteworthy cytotoxicity against HT-29 cells at 250 g/mL concentration, with 74.4 and 82.95% cell death against WCJ and TCCJ AgNPs with IC50 value of 92. 99 and 97.42 µg/mL, respectively.
      PubDate: 2021-09-27
       
  • Quantitative study of concentration-dependent optical characteristics of
           nanoparticle-embedded tumor

    • Abstract: Plasmonic photothermal therapy involves irradiation of a nanoparticle-embedded tumor, using near-infrared radiation, for its treatment. For a nanoparticle type, the absorption of incident radiation is governed by the nanoparticle dose (concentration of nanoparticles) and the type of tumor embedded with the nanoparticles. In this article, the optical characteristics (spectral absorption cross section, plasmonic wavelength and full-width half maxima) are computed, considering gold nanorod (GNR) doses of 0.02–1.0 mg/ml, for various tumor types i.e., colorectal, breast, brain and ameloblastoma. Also, the spatial distribution of nanoparticles within the tumor is accounted for. The results show that on increasing the GNR dose from 0.02 to 1.0 mg/ml, the peak absorption cross section increases by 26–28 times, whereas the plasmonic wavelength red-shifts by 8–13 nm and full-width half maxima increases by 68–71%. Depending on the spatial distribution of GNRs within the breast tumor, the optical absorption cross section increases by 45% and 94% for GNRs doses of 0.5 mg/ml and 1.0 mg/ml. These discussed results are of clinical significance for the prior estimation of nanoparticle dose-dependent optical characteristics for a tumor type. Based on these, suitable irradiation sources and parameters may be chosen for plasmonic photothermal therapy.
      PubDate: 2021-09-26
       
  • In situ detection of oil leakage by new self-sensing nanocomposite sensor
           containing MWCNTs

    • Abstract: One of the ever-existing concerns for operators in the oilfield industry is the integrity of the equipment used. Thus, in this crucial sector, an essential task involves developing extremely sensitive, reliable, and cost-effective techniques to detect and monitor oil spills. On this basis, the focus of this study is the creation and examination of the electrical resistance differences of novel self-sensing nanocomposite sensors used in distinct contexts to detect oil leaks. The technique integrates electrically conductive multi-walled carbon nanotubes (MWCNTs), with varying concentrations between 0 and 2.0 wt% and thicknesses, into elastomer polymer ethylene-propylene diene rubbers (EPDM). Initially, scanning electron microscopy and XRD test were used for examining dispersions. From the results, good distribution and homogeneity of the MWCNTs are observed. Such results are consistent with the decreased electric resistance that happens when there is an increase in the sensor’s thickness and the MWCNTs concentration. Also, it has been noted that nanocomposites’ piezoresistive characteristics principally rely on the sensor thickness and the concentration of the MWCNTs. For the sample with low thickness and volume fraction, a higher degree of resistance change is noted, resulting in a gauge factor of 13.41. Also, the impact of viscosity and temperature are addressed. When the MWCNTs concentration is lower, the sensors show higher levels of sensitivity to viscosity and temperature. Such observations imply that when oil spills, it tends to move in the direction of the EPDM matrix/filler interfaces. Following the sensor’s swelling, the MWCNTs network is pushed to disintegrate, leading to a dramatic escalation in the sensor’s electrical resistance.
      PubDate: 2021-09-25
       
  • Biogenic production of silver nanoparticles from milk of Capra aegagrus
           hircus and mechanism of antibacterial activity on different bacteria

    • Abstract: In the present study, we report a simple, rapid, cost-effective approach for the white synthesis of silver nanoparticles (AgNPs) using Capra aegagrus hircus milk. The formation of AgNPs was visually examined and further investigated using UV–visible spectrophotometer, transmission electron microscopy, scanning electron microscopy with energy dispersive X-ray, Fourier infrared spectroscopy, and X-ray diffractometer. Crystalline lattice indices of AgNPs were performed using the XRD analysis. The diffraction peaks at 2θ values of 37.7°, 46.1°, 67.4°, and 76.84° corresponding to lattice planes (111), (200), (220), and (311), respectively. The obtained AgNPs were spherical in shape with the size between 5 and 50 nm. The antibacterial activity of AgNPs against Klebsiella sp. (Accession Number: KC899845), and Staphylococcus sp. (Accession Number: KC688883) were evaluated by means of cell growth.
      PubDate: 2021-09-25
       
 
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