Subjects -> ENGINEERING (Total: 2688 journals)
    - CHEMICAL ENGINEERING (229 journals)
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CHEMICAL ENGINEERING (229 journals)                  1 2 | Last

Showing 1 - 200 of 234 Journals sorted alphabetically
ACS Applied Nano Materials     Hybrid Journal   (Followers: 9)
ACS Applied Polymer Materials     Hybrid Journal   (Followers: 8)
ACS Engineering Au     Open Access   (Followers: 6)
ACS Environmental Au     Open Access   (Followers: 8)
ACS ES&T Engineering     Hybrid Journal   (Followers: 1)
ACS ES&T Water     Hybrid Journal  
ACS Sustainable Chemistry & Engineering     Hybrid Journal   (Followers: 10)
Acta Chemica Malaysia     Open Access  
Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials     Hybrid Journal   (Followers: 6)
Acta Polymerica     Hybrid Journal   (Followers: 9)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 10)
Advanced Chemical Engineering Research     Open Access   (Followers: 52)
Advanced Membranes     Open Access   (Followers: 3)
Advanced Powder Technology     Hybrid Journal   (Followers: 15)
Advances in Applied Ceramics     Hybrid Journal   (Followers: 4)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 24)
Advances in Chemical Engineering and Science     Open Access   (Followers: 109)
Advances in Polymer Technology     Open Access   (Followers: 14)
Aerosol Science and Engineering     Hybrid Journal  
Aerosol Science and Technology     Hybrid Journal   (Followers: 13)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 6)
All Life     Open Access  
American Journal of Polymer Science & Engineering     Open Access   (Followers: 2)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 12)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Anti-Corrosion Methods and Materials     Hybrid Journal   (Followers: 11)
Applied Petrochemical Research     Open Access   (Followers: 2)
ASEAN Journal of Chemical Engineering     Open Access  
Asia-Pacific Journal of Chemical Engineering     Hybrid Journal   (Followers: 6)
Asian Journal of Applied Chemistry Research     Open Access   (Followers: 1)
Biochemical Engineering Journal     Hybrid Journal   (Followers: 13)
Biofuel Research Journal     Open Access   (Followers: 1)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Bulletin of Chemical Reaction Engineering & Catalysis     Open Access   (Followers: 3)
Bulletin of Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 1)
C&EN Global Enterprise     Full-text available via subscription  
Carbohydrate Polymers     Hybrid Journal   (Followers: 9)
Carbon Capture Science & Technology     Open Access  
Case Studies in Chemical and Environmental Engineering     Open Access  
Catalysts     Open Access   (Followers: 11)
Chem Catalysis     Hybrid Journal  
ChemBioEng Reviews     Full-text available via subscription   (Followers: 3)
ChemEngineering     Open Access  
Chemical and Engineering News     Free   (Followers: 22)
Chemical and Materials Engineering     Open Access   (Followers: 54)
Chemical and Petroleum Engineering     Hybrid Journal   (Followers: 8)
Chemical and Process Engineering     Open Access   (Followers: 67)
Chemical and Process Engineering Research     Open Access   (Followers: 64)
Chemical Engineer, The     Partially Free  
Chemical Engineering & Technology     Hybrid Journal   (Followers: 28)
Chemical Engineering and Processing: Process Intensification     Hybrid Journal   (Followers: 15)
Chemical Engineering and Science     Open Access   (Followers: 58)
Chemical Engineering Communications     Hybrid Journal   (Followers: 14)
Chemical Engineering Education     Full-text available via subscription   (Followers: 2)
Chemical Engineering Journal     Hybrid Journal   (Followers: 71)
Chemical Engineering Journal Advances     Open Access   (Followers: 1)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 26)
Chemical Engineering Research Bulletin     Open Access   (Followers: 44)
Chemical Engineering Science     Hybrid Journal   (Followers: 28)
Chemical Geology     Hybrid Journal   (Followers: 31)
Chemical Papers     Hybrid Journal   (Followers: 4)
Chemical Reviews     Hybrid Journal   (Followers: 168)
Chemical Science International Journal     Open Access  
Chemical Society Reviews     Hybrid Journal   (Followers: 44)
Chemical Technology     Open Access   (Followers: 75)
ChemInform     Hybrid Journal   (Followers: 5)
Chemistry & Industry     Full-text available via subscription   (Followers: 6)
Chemistry Africa : A Journal of the Tunisian Chemical Society     Hybrid Journal  
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry of Materials     Hybrid Journal   (Followers: 161)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 13)
Chempublish Journal     Open Access  
ChemSusChem     Hybrid Journal   (Followers: 7)
Chinese Chemical Letters     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemical Engineering     Full-text available via subscription   (Followers: 3)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
Cleaner Chemical Engineering     Open Access   (Followers: 2)
Coke and Chemistry     Hybrid Journal   (Followers: 1)
Coloration Technology     Hybrid Journal  
Computational Biology and Chemistry     Hybrid Journal   (Followers: 13)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 12)
CORROSION     Full-text available via subscription   (Followers: 20)
Corrosion Engineering, Science and Technology     Hybrid Journal   (Followers: 35)
Crystal Research and Technology     Hybrid Journal   (Followers: 7)
Current Opinion in Chemical Engineering     Open Access   (Followers: 5)
Current Research in Food Science     Open Access  
Designed Monomers and Polymers     Open Access   (Followers: 1)
Digital Chemical Engineering     Open Access  
Discover Chemical Engineering     Open Access  
Education for Chemical Engineers     Hybrid Journal   (Followers: 5)
Eksergi     Open Access  
Emerging Trends in Chemical Engineering     Full-text available via subscription   (Followers: 3)
EnergyChem     Hybrid Journal   (Followers: 1)
Equilibrium : Journal of Chemical Engineering     Open Access  
Eurasian Chemico-Technological Journal     Open Access  
European Polymer Journal     Hybrid Journal   (Followers: 42)
Fibers and Polymers     Full-text available via subscription   (Followers: 4)
Focusing on Modern Food Industry     Open Access   (Followers: 2)
Food and Environment Safety     Open Access   (Followers: 3)
Food Chemistry     Hybrid Journal   (Followers: 18)
Food Chemistry : Molecular Sciences     Open Access   (Followers: 1)
Food Chemistry : X     Open Access   (Followers: 1)
Food Frontiers     Open Access   (Followers: 1)
Frontiers in Chemical Engineering     Open Access  
Frontiers in Sensors     Open Access   (Followers: 6)
Frontiers in Sustainable Food Systems     Open Access   (Followers: 2)
Frontiers of Chemical Science and Engineering     Hybrid Journal   (Followers: 5)
Gases     Open Access   (Followers: 1)
Gels     Open Access  
Geochemistry International     Hybrid Journal   (Followers: 1)
Graphene Technology     Hybrid Journal  
Green Chemical Engineering     Open Access  
High Performance Polymers     Hybrid Journal   (Followers: 1)
Indian Chemical Engineer     Hybrid Journal   (Followers: 4)
Indian Journal of Chemical Technology (IJCT)     Open Access   (Followers: 9)
Indonesian Journal of Chemical Science     Open Access  
Industrial & Engineering Chemistry     Full-text available via subscription   (Followers: 10)
Industrial & Engineering Chemistry Research     Hybrid Journal   (Followers: 20)
Industrial Gases     Open Access  
Info Chimie Magazine     Full-text available via subscription   (Followers: 1)
International Journal of Ceramic Engineering & Science     Open Access  
International Journal of Chemical Engineering     Open Access   (Followers: 7)
International Journal of Chemical Technology     Open Access   (Followers: 7)
International Journal of Chemistry and Technology     Open Access   (Followers: 1)
International Journal of Chemoinformatics and Chemical Engineering     Full-text available via subscription   (Followers: 2)
International Journal of Food Science     Open Access   (Followers: 3)
International Journal of Industrial Chemistry     Open Access  
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
International Journal of Polymeric Materials     Hybrid Journal   (Followers: 6)
International Journal of Waste Resources     Open Access   (Followers: 5)
International Research Journal of Pure and Applied Chemistry     Open Access  
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)     Open Access   (Followers: 1)
Iranian Journal of Polymer Science and Technology     Open Access   (Followers: 1)
Journal of Advanced Manufacturing and Processing     Hybrid Journal  
Journal of Aerosol Science     Hybrid Journal   (Followers: 7)
Journal of Applied Crystallography     Hybrid Journal   (Followers: 7)
Journal of Applied Electrochemistry     Hybrid Journal   (Followers: 12)
Journal of Applied Polymer Science     Hybrid Journal   (Followers: 107)
Journal of Applied Science & Process Engineering     Open Access  
Journal of Biomaterials Science, Polymer Edition     Hybrid Journal   (Followers: 9)
Journal of Biopharmaceutics Sciences     Open Access   (Followers: 3)
Journal of Chemical & Engineering Data     Hybrid Journal   (Followers: 10)
Journal of Chemical and Petroleum Engineering     Open Access   (Followers: 1)
Journal of Chemical Ecology     Hybrid Journal   (Followers: 4)
Journal of Chemical Engineering     Open Access   (Followers: 63)
Journal of Chemical Engineering and Materials Science     Open Access   (Followers: 5)
Journal of Chemical Sciences     Partially Free   (Followers: 22)
Journal of Chemical Technology & Biotechnology     Hybrid Journal   (Followers: 11)
Journal of Chemical Theory and Computation     Hybrid Journal   (Followers: 21)
Journal of CO2 Utilization     Hybrid Journal   (Followers: 1)
Journal of Coating Science and Technology     Hybrid Journal  
Journal of Coatings     Open Access   (Followers: 3)
Journal of Engineered Fibers and Fabrics     Open Access  
Journal of Engineering & Processing Management     Open Access  
Journal of Environmental Chemical Engineering     Hybrid Journal   (Followers: 5)
Journal of Food Chemistry & Nanotechnology     Open Access   (Followers: 1)
Journal of Food Measurement and Characterization     Hybrid Journal  
Journal of Food Processing & Technology     Open Access   (Followers: 1)
Journal of Fuel Chemistry and Technology     Full-text available via subscription   (Followers: 1)
Journal of Geochemical Exploration     Hybrid Journal   (Followers: 4)
Journal of Industrial and Engineering Chemistry     Hybrid Journal   (Followers: 2)
Journal of Information Display     Open Access   (Followers: 1)
Journal of Inorganic and Organometallic Polymers and Materials     Hybrid Journal   (Followers: 8)
Journal of Leather Science and Engineering     Open Access  
Journal of Materials Science and Chemical Engineering     Open Access   (Followers: 1)
Journal of Modern Chemistry & Chemical Technology     Open Access   (Followers: 2)
Journal of Non-Crystalline Solids     Hybrid Journal   (Followers: 7)
Journal of Non-Crystalline Solids : X     Open Access  
Journal of Organic Semiconductors     Open Access   (Followers: 6)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 3)
Journal of Polymer and Biopolymer Physics Chemistry     Open Access   (Followers: 7)
Journal of Polymer Research     Hybrid Journal   (Followers: 7)
Journal of Polymer Science Part C : Polymer Letters     Hybrid Journal   (Followers: 5)
Journal of Polymers     Open Access   (Followers: 7)
Journal of Polymers and the Environment     Hybrid Journal   (Followers: 1)
Journal of Powder Technology     Open Access   (Followers: 4)
Journal of Pure and Applied Chemistry Research     Open Access   (Followers: 3)
Journal of the American Chemical Society     Hybrid Journal   (Followers: 321)
Journal of The Institution of Engineers (India) : Series E     Hybrid Journal   (Followers: 2)
Journal of the Taiwan Institute of Chemical Engineers     Hybrid Journal   (Followers: 1)
Journal of the Turkish Chemical Society, Section B : Chemical Engineering     Open Access  
Journal of Water Chemistry and Technology     Hybrid Journal   (Followers: 8)
Journal on Today's Ideas - Tomorrow's Technologies     Open Access   (Followers: 1)
JSFA reports     Full-text available via subscription  
Jurnal Bahan Alam Terbarukan     Open Access  
Jurnal Inovasi Pendidikan Kimia     Open Access  
Jurnal Rekayasa Kimia & Lingkungan     Open Access  
Jurnal Teknologi Dan Industri Pangan     Open Access  
Korean Journal of Chemical Engineering     Hybrid Journal   (Followers: 5)
Kvasný Průmysl     Open Access  
Materials Advances     Open Access   (Followers: 2)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 15)
Materials Science for Energy Technologies     Open Access  
Materials Sciences and Applied Chemistry     Full-text available via subscription  
Modern Chemistry & Applications     Open Access   (Followers: 1)
Molecular Catalysis     Hybrid Journal   (Followers: 6)
Nanochemistry Research     Open Access   (Followers: 1)
Natural Volatiles & Essential Oils     Open Access  

        1 2 | Last

Similar Journals
Journal Cover
Chemistry Africa : A Journal of the Tunisian Chemical Society
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2522-5758 - ISSN (Online) 2522-5766
Published by Springer-Verlag Homepage  [2469 journals]
  • Thermochemical Characterization of African Oil Bean Husk for Potential
           Biofuel Production

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      Abstract: Abstract The environmental hazard posed by fossil fuels has continued to be a major global concern, arousing more research interests towards biofuel production from energy crops and agricultural residues. In this study, biomass residue from African oil bean (Pentaclethra macrophyla Benth) seed husk (AOBSH) was characterized for potential application as a feedstock for the production of bio-oil via pyrolysis. The proximate, ultimate and thermogravimetric analyses were determined for AOBSH according to standard methods. The proximate analysis shows low ash content (0.71%) and volatile content of 76.2% of the husk favorable to high bio-oil yield, while the TGA analysis result indicates that only 19.502% of the weight was left at a temperature of 457.64˚C. The ultimate analysis revealed relatively high carbon content (47.65%), desirable heating value (19.5 MJ/kg), low nitrogen (< 1%) and sulphur (< 0.1) contents. The cellulose, hemicellulose, lignin and extractive contents were determined as 42.34, 19.2, 14.47 and 23.99% respectively. Based on the favorable results, African oil bean seed husk is recommended as a suitable potential biomass feedstock for bio-oil production.
      PubDate: 2022-05-15
       
  • A Comprehensive Review on Application of Lignocellulose Derived
           Nanomaterial in Heavy Metals Removal from Wastewater

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      Abstract: In the present scenario, heavy metals in wastewater are among the most severe environmental problems. Wastewater treatments remain a critical issue to date despite advancements in technologies. Global transition for greener and sustainable materials focused on lignocellulosic derived nanomaterials for wastewater treatment and investigated as one of the suitable solutions in industrial scale for environmental remediation. This review provides detailed information about the production of lignocellulosic-based nanomaterial, their adsorption kinetics, applications of reactors, and membranes methods for large-scale remediation of heavy metals from wastewater. The nanosized lignin and cellulose show superior adsorption behavior for the adsorption of heavy metals. Nanocellulose based membranes and filters have been developed to decrease the concentration of heavy metals from wastewater. Several reactors such as batch, continuous, fixed bed, and fluidized bed have been studied to remove heavy metals based on the adsorption phenomenon. The different thermodynamic and kinetic models of lignocellulose-based nanomaterials in context with heavy metal removal have been summarized. The future perspective and challenges linked to lignocellulosic-based nanomaterials and their viability and commercialization have been highlighted in the present review. Graphical
      PubDate: 2022-05-14
       
  • Popular Food Colors for Sustainable Corrosion Inhibition of Mild Steel in
           0.5 M H2SO4: Electrochemical and Surface Morphological Investigation

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      Abstract: One of the applications of azo compounds is as food colors in various countries. The azo dyes have interesting chemical structures and hence attract attention to test them for corrosion prevention applications. Three azo dyes namely Amarnyth (AH), Allura red (AD) and Sunset Yellow (SW) are tested for inhibition of mild steel (MS) corrosion in 0.5 M H2SO4. The techniques used for the examination are Fourier Transform Infrared spectroscopy (IRS), UV–Visible spectroscopy (UV–Vis), electrochemical impedance spectroscopy (EIS), linear polarization resistance (Rl), Tafel polarization curves (TC), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The AH provides inhibition of 90%, whereas SW and AD offer inhibition of 80% and 78% respectively. The inhibition was realized because of MS coverage via adsorption of azo dyes of in sulfuric acid solutions, which is evidently visible in SEM and AFM images. The azo dyes adsorb on MS as per Langmuir isotherm. A schematic illustration is also provided based on the findings of this work. Graphical abstract
      PubDate: 2022-05-09
       
  • Computer-Aided Drug Design and ADMET of Novel Potent Dengue Virus NS-5
           Inhibitors

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      Abstract: Abstract In furtherance of our previous study on some dengue virus (DENV) NS-5 protease inhibitors, which provided us with a lead compound exhibiting high potency against DENV NS-5 protease. This study aimed to design more potent derivatives of the lead inhibitor with good pharmacokinetic properties and non-toxic utilizing a computationally based process that is precise and less expensive. By substituting the quinoline of the sulfonamide and the core phenyl ring of the lead compound identified in our previous study, eight more potent derivatives were discovered, which were docked with the DENV NS-5 receptor and then tested for drug-likeness, bioavailability, and toxicity. Quantum chemical calculations were performed on the designed compounds using density function theory (DFT) to obtain their global reactivity parameters. The docking scores of the newly designed DENV NS-5 protease inhibitors obtained using Vina-pyrx software ranged between − 8.40 and − 10.40 kcal/mol, outperforming both the lead and reported referenced inhibitors (Fenretinide and S-adenosyl-l-homocysteine), which had docking scores of − 8.3 and − 6.0 kcal/mol, respectively. Compounds 29J, 29N, and 29P had the best docking scores of − 10.00, − 10.40, and − 10.30 kcal/mol, respectively, with a good drug-likeness, oral bioavailability, and no probable toxicity. The band energy gap obtained for the design compound is in the order of 29i (2.85 eV) < Lead (3.03 eV) < 29O (3.38 eV) < 29P (3.6 eV) < 29G (3.7 eV) < 26i (3.94 eV) (eV) = 29N (3.94 eV) < 29K (3.95 eV) < 29H (3.98 eV) < 29b (4 eV) < (4.05 eV). According to this study, the proposed compounds could be useful in the development of more effective DENV treatments and as a suitable alternative to existing DENV protease inhibitors.
      PubDate: 2022-04-29
       
  • Date Stone Functionalized with 3-Aminopropyltriethoxysilane as a Potential
           Biosorbent for Heavy Metal Ions Removal from Aqueous Solution

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      Abstract: A novel biosorbent based on date stones (DS) and 3-aminopropyltriethoxysilane (APTES) was successfully elaborated by a simple chemical grafting of APTES on the surface of DS. The purpose of the present study was to examin the feasibility of the synthesized biomaterial in removing heavy metal ions from aqueous solutions. The chemical structure and the morphology of the DS@APTES were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy combined with an energy-dispersive X-ray spectroscopy (SEM–EDS). The adsorption parameters, such as pH, adsorbent dose, contact time, initial metal ion concentration and temperature were optimized. It has been found that the increase in contact time and the amount of adsorbent provide an enhancement of the removal capacity, while, the increase in heavy metal concentration, as well as temperature, can lead to a decrease in the adsorption efficiency. Under optimal conditions (temperature of 25 °C, pH 5.5, initial metal concentration of 10 mg L–1, 120 min contact time and adsorbent dosage of 1 g L–1), the synthesized DS@APTES exhibited high removal efficiencies of 95.29%, 72.35%, and 67.64% for Zn (II), Cu (II) and Pb (II) respectively. The Adsorption process follows both Langmuir and Freundlich isotherms models (r2 > 0.96) and was well described by the pseudo-second-order kinetic model which specifies the chemisorption nature. Furthermore, the calculated thermodynamic parameters have suggested that the heavy metals adsorption on DS@APTES is spontaneous and exothermic. This study illustrates that the prepared material is a promising adsorbent for the removal of heavy metal ions from aqueous solutions with the demonstrated high adsorption capacity. Graphical abstract
      PubDate: 2022-04-28
       
  • Insight into the Structural and Physical Properties of Semiorganic KHOOD
           Single Crystal

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      Abstract: Abstract A metal–organic hybrid compound named potassium hydrogen oxalate oxalic acid dihydrate (KH3(C4O8)·2H2O) single crystal (KHOOD) is synthesized using a facile and different approach. The obtained crystals are thoroughly investigated using single crystal XRD (SCXRD), powder XRD (PXRD), UV–Vis absorption, photoluminescence, TGA-DTA and dielectric measurements. The crystal system is confirmed and the structure of the crystal is solved using single crystal X-ray diffraction (SCXRD) analysis to the R value of 0.024. The PXRD measurements are employed to evaluate the structural properties of the crystal. Absorption measurements are carried out in the UV–visible region, and photoluminescence measurements show strong blue emission at 427 nm. Thermal stability and degradation in the crystal is explored using TGA-DTA analysis. Frequency dependent electrical response of the crystal is investigated and parameters such as frequency dependent complex dielectric constant, complex impedance, loss factor, ac conductivity and Cole–Cole plots are determined. These results demonstrate the feasibility of facile synthesis of KH3(C4O8)·2H2O single crystal used in modern optoelectronic applications.
      PubDate: 2022-04-26
       
  • Optimization in the Aqueous Two Phase Extraction of Solasodine from
           Solanum mauritianum and Analysis via UHPLC-qTOF-MS

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      Abstract: Abstract Aqueous two phase extraction (ATPE) was applied to extract an allelochemical, solasodine, from an invasive plant, Solanum mauritianum. Central composite design was performed which included numerical parameters such as time and mass of plant powder. The categorical factors included the type of salt used in facilitating extraction such as the chaotrope (NaCl) and kosmotrope (Na2CO3). Fitting the central composite design response surface model to the experimental data generated a quadratic model with a good fit (R2 = 0.925). The linear effect of the mass of plant powder was a statistically significant (p < 0.05) parameter for solasodine extraction. The optimized conditions for the extraction of solasodine in the presence of NaCl or Na2CO3 were time: 10 min and mass of plant powder: 1.2 g. Corresponding to these conditions, the maximal mean extraction based on multiple reaction monitoring (MRM) transition of solasodine (m/z 414 → 396) on the ultra-high performance liquid chromatography, time of flight mass spectrometer (UHPLC-qTOF-MS) was 233.65 mg kg−1 and 413.50 mg kg−1 for NaCl and Na2CO3, respectively. The greater extraction by the kosmotrope was due to the higher negative charge density of the carbonate ion during salting-out. Furthermore, the synergistic effect of the mass of plant powder and salting-out was shown to enhance the extraction of solasodine compared to the chaotrope. The promising solasodine extraction performance, particularly in Na2CO3 assisted ATPE, can have positive implications in its application commercially as green and reliable extraction methods to meet the ever-growing demand for nutraceutical compounds from natural products.
      PubDate: 2022-04-25
       
  • Correction to: Topical Anti-Inflammatory Activity of Petiveria alliacea,
           Chemical Profiling and Computational Investigation of Phytoconstituents
           Identified from its Active Fraction

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      PubDate: 2022-04-22
       
  • Anti-inflammatory, Antioxidant and Cytotoxic Activities of Guibourtia ehie
           on Human Prostate (PC-3) and Breast Cancer (MC-7) Cell Lines and in silico
           Studies on Its Metabolite 7,4′-Dihydroxyflavone

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      Abstract: Abstract Guibourtia ehie (A. Chev.).Léonard (leguminosae), is a forest tree of Africa used traditionally for tumours, wound cleansing and diarrhoea. However, some of these ethnomedical uses have not been validated scientifically. The present study aimed at investigating the anti-inflammatory, antioxidant and cytotoxic effects of the plant extract. The study further evaluates the contribution of its metabolite 7,4′-dihydroxyflavone to these effects. Anti-inflammatory activity of the 70% ethanol extract of the stem bark of G. ehie was established using the carrageenan induced foot oedema in 7-day-old chicks at 30–100 mg/kg body weight with diclofenac as reference drug. The DPPH radical scavenging activity was used for the antioxidant test whereas cytotoxic effect was done using prostate cancer (PC-3) and breast cancer (MC-7) cell lines with MTT as a measure of cell viability. In silico analysis of the pharmacokinetics and toxicity of the compound isolated from the plant was also performed. The extract and reference drug diclofenac inhibited foot pad oedema by 28.58% and 61.99% respectively over the 5-hour period. The isolate showed a marginally higher activity than the extract (32.64%). The extract was cytotoxic against breast (MC-7) and prostate (PC-3) cancer cell lines with respective IC50 values of 67.43 and 61.12 µg/mL but showed poor selectivity index (SI < 2). The isolate 7,4′-dihydroxyflavone was non-cytotoxic and this was also confirmed from the in-silico studies. G. ehie and its isolate exhibit anti-inflammatory and antioxidant effect as suggested by folklore medicine. The extract was cytotoxic to breast and prostate cancer cell lines but was nonselective.
      PubDate: 2022-04-17
       
  • Determination of the Chromium (VI) Content in Five Species of Fish from
           Soumbédioune Beach (Dakar/Senegal)

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      Abstract: Abstract Coastal waters can be considered critical habitats for fish species which are considered to be bioindicators of environmental quality. Thus, the evaluation of metal contamination in marine organisms, in particular fish, makes it possible to predict a possible contamination of humans. Soumbédioune beach, a landing place for fishery products, is home to canal IV which drains urban wastewater from part of the Dakar region. Cr can be very hazardous to human health when present in the environment at high concentrations. We evaluated the Cr6+ contents in five species of fish caught in this area by UV–visible spectrophotometry. The results obtained show that the average concentrations for the first campaign vary from 11.06 µg/g with Pagellus bellottii (P.b) to 40.64 µg/g with Lagocephalus laevigatus (L.l). However, the values found are much higher than the standard established by the EEC/R No.466/2001 for Cr (VI) which was 5.5 µg/g.
      PubDate: 2022-04-15
       
  • Comparative Study of Two Acid Digestion Protocols for Evaluating
           Potentially Toxic Elements in Surface Sediments Influenced by Sewage
           Discharge and Sand Mining Activity

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      Abstract: Abstract The study aimed to compare two acid digestion techniques, the partial digestion (total-recoverable) protocol by USEPA 3051 (HNO3) and total digestion (total-total) method by Hossner (Methods of soil analysis: Part 3. Chemical methods, SSSA and ASA, Madison, pp 49–64, 1996), to recommend an efficient method for evaluating ten potentially toxic elements (PTEs) (i.e., As, Pb, Cu, Cd, Mn, Zn, Cr, Ni, Co, and Fe) concentrations in surface sediments influenced by sewage discharge and sand mining activity. Inductively coupled plasma-optical emission spectroscopy (ICP-OES) analyzed the PTEs after sample treatment and extraction. The hot plate Hossner method exhibited high PTEs extractability than the microwave-assisted USEPA 3051 method. Generally, As, Pb, Cu, Cd, Mn, Zn, and Cr extracted by both methods depicted sediment background concentrations. No significant differences in concentrations between the two digestion techniques for Ni, Co, and Fe were observed in all samples. Furthermore, lower negative biases were observed between the two digestion techniques for extracting Ni, Co, and Fe in all sediment samples. Also, positive correlations between the total-recovery protocol and the total-total method were observed for Ni, Co, and Fe concentrations in all study sites. This implied that both total-recoverable and total-total methods were efficiently extracted Ni, Co, and Fe in all sediment samples. In addition, the total-recoverable method partially extracted other PTEs in the sediment samples, unlike the total-total technique. The total-recoverable (USEPA 3051) method can be recommended for extracting PTEs in sediment samples originating from lithogenic sources on the condition of using a strong acid such as HF or strong acids combination. The study revealed that sediment physicochemical characteristics influence the extraction of PTEs in sediment. Therefore, sediment factors should be considered when selecting incomplete acid digestion methods for extracting PTEs.
      PubDate: 2022-04-11
       
  • Century Impact of Macromolecules for Advances of Sensing Sciences

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      Abstract: Impact of macro molecular theory on the progress of sensing sciences and technology has been presented in the light of materials developments, advances in physical and chemical properties. The chronological advances in the properties of macromolecules have significantly improved the sensing performances towards gases, heavy metals, biomolecules, hydrocarbon, and energetic compounds in terms of unexplored sensing parameters, durability, and working lifetime. In this review article, efforts have been made to correlate the advances in structure and interactivity of macro-molecules with their sensing behavior and working performances. The significant findings on the macromolecules towards advancing the sensing sciences are highlighted with the suitable illustration and schemes to establish it as a potential “microanalytical technique” along with existing challenges. Graphical
      PubDate: 2022-04-11
       
  • Sealing of Porous Anodic Film by Cerium-Conversion Coating on AA2024
           Aluminum Alloy: Study on the Anticorrosion Performance

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      Abstract: Abstract In this study, we report investigation on the synergistic effect efficiency between anodizing process and cerium-based conversion deposit (CeEC) on the corrosion behavior of 2024-T4 aluminum alloy substrate. Structural and chemical details were revealed by the X-ray diffraction (XRD) and Raman microscopy. The synergistic effect efficiency against corrosion of 2024 Al-alloy in contact with aerated 3.5 wt.% NaCl solution was clearly evidenced from the potentiodynamic polarization technique and electrochemical impedance spectroscopy (EIS), over a wide frequency domain (1 MHz–1 mHz). The polarization resistance (> 105 kΩ cm2) and the inhibiting efficiency (> 97%) obtained for the Al-alloy specimen undergoing both anodizing and CeEC deposit reveal outstanding anticorrosion properties, in contrast to the CeEC-treated and untreated samples.
      PubDate: 2022-04-05
       
  • Biological Evaluation and Docking Study of Synthesized Derivatives of
           Benzotriazole and Benzimidazole as Antibacterial Agents

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      Abstract: Background To tackle the menace of multi-resistant bacteria which pose challenges to scientist, four benzotriazole derivatives and three benzimidazole derivatives were synthesized via two routes due to the importance of heterocyclic compound in medicinal chemistry. Two protein target DNA gyrase with PDB ID 2XCT and PDB ID 3ILW were docked with the synthesized compound and compared with the two standard drugs sparfloxacin and ciprofloxacin. Results For benzotriazole derivatives, the reaction in acetonitrile resulted in lower yields (18–25%) than with dimethylformamide/potassium hydroxide (DMF/KOH), which generated higher yields (68–92%) in shorter reaction time. Those of benzimidazole were comparable. The products were characterized by FTIR, 1H, and 13C NMR, while the association between atoms was shown in 2D NMR. The synthesized compounds were docked against two DNA gyrase with PDB ID 2XCT and PDB ID 3ILW. It was observed that 1-butyl-1H-benzotriazole (− 13.716) and 1-butyl-3-octyl-1H-benzotriazolium (− 12.324) were the most active against PDB ID 2XCT and PDB ID 3ILW, respectively. However, they were both less active than the standard drugs used. Using the agar diffusion technique, the synthesized compounds demonstrated broad-spectrum antibacterial activity against gram-positive and gram-negative pathogenic bacteria strains. Notably, all the compounds were of varying potency; with inhibition zones ranging from 24 to 30 mm and MIC ranging from 25 to 50 μg/mL. Conclusions The benzotriazole and benzimidazole derivatives were synthesized successfully. This research revealed that the synthesized compounds were active against organisms with activity, the docking results revealed that the synthesized compounds have relatively low binding energy when compared with the standard drug used as well as those reported earlier. Thus, it will give better interaction on the binding site of the protein. These synthesized compounds could be a source of new drugs that could be used to treat multi-resistance bacteria.
      PubDate: 2022-04-05
       
  • Sequential Detection of Fe3+ and Ascorbic Acid with Cu Nanosheets as
           Fluorescent Probe and Their Application

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      Abstract: Abstract A novel fluorescent probe of copper nanosheets (Cu NS) with blue emission was synthesized using ascorbic acid (AA) as stabilizer and reductant, which was characterized with TEM, XPS, and FT-IR. Several studies that include optical spectra, FT-IR spectra, and fluorescence lifetime were provided to explore the fluorescence quenching mechanism between Cu NS and Fe3+, negating inner filter effect (IFE) and fluorescence resonance energy transfer (FRET), which was found to be dynamic quenching through electron transfer. Due to the reducing property of AA, the fluorescence of Cu NS was restored. Additionally, the Stern–Volmer equation was established to calculate Kq and Ksv demonstrating the quenching rate. Based on the dynamic quenching via oxidation–reduction reaction, a method was developed for the sequential detection of Fe3+ and AA, which showed brilliant sensitivity and high selectivity. The detection ranges of Fe3+ and AA were 0.06–59.4 μM and 0.06–24.4 μM, with the LOD of 31.0 nM and 7.0 nM, respectively. Furthermore, the proposed method was successfully applied to the detection of real water samples and vitamin C (VC) tablet samples with recovery range 95.03–103.25% and 96.28–101.02%. Cu NS was promising for monitoring the concentration of Fe3+ in the environment and drug analysis of AA.
      PubDate: 2022-04-04
       
  • Study of Photochemical and Sonochemical Processes Efficiency for
           Degradation of Acibenzolar-S-Methyl Fungicide in Aqueous Solution

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      Abstract: Abstract In this study, the catalytic performance of photo-Fenton and sono-Fenton processes were tested on Acibenzolar-S-methyl fungicide. UV light source and ultrasound irradiation source (20 kHz of the frequency with a maximum of 125 W power output) were used for Fenton-based processes. The sono-Fenton process revealed the higher efficiency in ASM degradation with a 100% degradation rate within 20 min compared to photo-Fenton, Fenton, photolysis, and sonolysis processes that achieved only 90%, 52%, 43% and 19%, respectively. The investigation shows that ultrasound irradiation has accelerated the efficiency of the Fenton process by increasing the hydroxyl radicals ∙OH generation. The kinetic study was carried out under different pH conditions, ferrous ions concentration and hydrogen peroxide dosages. The result showed that the optimum condition for acibenzolar-s-methyl degradation was the acidic medium, low concentration of hydrogen peroxide and low concentration of ferrous ions. The contaminant was monitored and analysed in duplicate with high-performance liquid chromatography. A transformation mechanism pathway of the sonochemical oxidation was suggested based on gas chromatography/mass spectra analysis.
      PubDate: 2022-04-04
       
  • Review on Solvents Based Alkyd Resins and Water Borne Alkyd Resins:
           Impacts of Modification on Their Coating Properties

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      Abstract: Abstract In recent times, attempts have been made to produce eco-friendly sound exceptional resin compounds from natural renewable resources. Among the diverse renewable available sources, vegetable oils obtained from various seeds are considered the best natural sources, due to their novel characteristics, worldwide abundance and functionalities. However, the alkyd resins synthesized from available vegetable oils are still limited in properties. This review focused on the several modification routes that have been utilized in the synthesis of solvents and water based alkyd resins, the impacts on their coating properties and challenges of using alkyd coatings. Literature analysis reveals that modifications of solvents based alkyd resins and water-borne alkyd resins have immensely improved their potential applications in the field of paints and coatings. Properties like adhesion, drying time, gloss retention, resistance to scratch, chemical resistance capability in various corrosive environments, thermal stability, flexibility, roughness, hardness, abrasion resistance, mechanical properties, etc., were improved by modifying solvent based alkyd resin and water based alkyd resin with gum rosin, acrylate, n-butyl methacrylate, maleican hydride, silicon oxide (SiO2), titanium oxide (TiO2), etc. Also, waterborne coatings have been shown to be a more environmentally friendly coating when compared to solvent based coatings. However, water based alkyd resin is more eco-friendly than the solvent based alkyd resin; as a consequence, they emit little or no contaminant that can be detrimental to the environment.
      PubDate: 2022-04-01
       
  • Dehydrate Sewage Sludge as an Efficient Adsorbent for Malachite Green
           Removal in Textile Wastewater: Experimental and Theoretical Studies

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      Abstract: Abstract We present in this study a simple approach on the application of dried dewatered sewage sludge (D@DSS) generated from a local wastewater treatment plant (WWTP). The D@DSS can be considered as an alternative friendly and cost-effective adsorbent for malachite green (MG) dye removal from an aqueous solution using batch systems. This procedure did not require any modification of the adsorbent characteristics. D@DSS demonstrated an excellent retention capacity for MG at synthetic solutions, and in industrial wastewater. Moreover, the selectivity study of the adsorbent was performed against Methylene Blue and Red Congo shows better capability of this adsorbent towards cationic dyes. The D@DSS adsorbent characterization was carried-out using SEM, FTIR, Zeta potential, XRD and ICP. The results confirmed a rough and charged surface of the adsorbent with the presence of specific functional groups. The adsorption process fits well with the Jovanovic model isotherm and was adhered to the pseudo-second order kinetics. The process conditions were optimized using the response surface methodology, resulting in qe (78.10 mg g−1) for different values of the input variables, including pH (10), ionic strength (0.015 mg g−1), initial concentration (150 mg g−1), temperature (37.29 °C),contact time (58.25 min), adsorbent dose (0.05 g) and particle size (0.203 mm). Hence, the proposed D@DSS can be effectively applied as a low-cost adsorbent for MG elimination from different contaminated water samples and can be easily extended to remove other cationic dyes.
      PubDate: 2022-04-01
       
  • Cubic Gold Nanoparticles Synthesis in the Presence of an Thioether
           Oligomer DDT-Poly(4-Vinylpyridine)

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      Abstract: Abstract In the present research work, we report a facile, in-situ, and seedless-based synthesis method of cubic gold nanoparticles at room temperature by using thioether oligomer ligand DDT-P4VP [dodecanethiol-poly(4-vinylpyridine)] as a functionalization and stabilization agent. Thioether oligomer ligand was synthesized by bulk radical polymerization in the presence of dodecanethiol, while; the synthesis of cubic gold nanoparticles was carried out by a reduction reaction by NaBH4 in the presence of the pre-synthesized thioether oligomer ligand. The effect of stirring condition on the growth of nanoparticles and their final morphology has been investigated. Synthesized thioether oligomer ligand and gold nanoparticles were thoroughly characterized using numerous techniques such as Size Exclusion Chromatography (SEC), Fourier Transform Infrared Spectroscopy (FTIR), Proton Nuclear Magnetic Resonance Spectroscopy (1H NMR), Transmission Electron Microscope (TEM), and UV − visible spectroscopy.
      PubDate: 2022-04-01
       
  • Effect of Collection Time on the Chemical Composition, Antioxidant and
           Antidiabetic Potentials of Leaf Essential Oil of Eucalyptus globulus L.
           Growing in North-Central, Nigeria

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      Abstract: Abstract This study is aimed at monitoring the effect of harvest time on the chemical composition, antidiabetic and antioxidant potentials of leaf essential oil of E. globulus. To achieve this, pulverized fresh leaves (500 g) of E. globulus from various times of harvest were separately hydrodistilled and yielded essential oils in the range of 0.06–0.23%. The oils were characterized using GC and GC–MS techniques. The analyses revealed abundance of γ-terpinene (0.6–14.0%), o-cymene (14.8 and 19.0%), m-cymene (0.4–22.8%), terpinen-4-ol (1.8–21.8%), linalool (0.1–10.3%) and spathulenol (7.7–25.3%) in the oils as well as 1,3,8-p-menthatriene (29.6%) and limonene (18.8%), in the oils of the 1.00 pm and 7.00am harvests respectively. The antioxidant potential of the oils was determined using DPPH radical scavenging, ferric reducing and total antioxidant assays while their antidiabetic potential was evaluated using in vitro α-amylase and α-glucosidase inhibitory assays. The oils scavenged DPPH radical, reduced ferric ion and inhibited the activities of α-amylase and α-glucosidase that were comparable to the activities of ascorbic acid and acarbose. Meanwhile, the oil from 10.00 am harvest showed the highest antidiabetic and antioxidant activities. Thus, the oil could be used to ameliorate oxidative stress and for the management of type 2 diabetes.
      PubDate: 2022-02-11
      DOI: 10.1007/s42250-022-00325-4
       
 
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