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CHEMISTRY (597 journals)                  1 2 3 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 7)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26)
ACS Catalysis     Full-text available via subscription   (Followers: 31)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 17)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 23)
ACS Macro Letters     Full-text available via subscription   (Followers: 22)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 39)
ACS Nano     Full-text available via subscription   (Followers: 217)
ACS Photonics     Full-text available via subscription   (Followers: 10)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 20)
Acta Chemica Iasi     Open Access   (Followers: 2)
Acta Chimica Sinica     Full-text available via subscription  
Acta Chimica Slovaca     Open Access   (Followers: 1)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 7)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 5)
Advanced Functional Materials     Hybrid Journal   (Followers: 48)
Advanced Science Focus     Free   (Followers: 3)
Advances in Chemical Engineering and Science     Open Access   (Followers: 53)
Advances in Chemical Science     Open Access   (Followers: 12)
Advances in Chemistry     Open Access   (Followers: 12)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 18)
Advances in Drug Research     Full-text available via subscription   (Followers: 22)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 14)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 18)
Advances in Nanoparticles     Open Access   (Followers: 12)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15)
Advances in Polymer Science     Hybrid Journal   (Followers: 40)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 18)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Science and Technology     Full-text available via subscription   (Followers: 10)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 2)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 7)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 65)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 14)
American Journal of Chemistry     Open Access   (Followers: 25)
American Journal of Plant Physiology     Open Access   (Followers: 13)
American Mineralogist     Full-text available via subscription   (Followers: 12)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 153)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 203)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 1)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 3)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 7)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 12)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 14)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Hybrid Journal  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 6)
Applied Spectroscopy     Full-text available via subscription   (Followers: 22)
Applied Surface Science     Hybrid Journal   (Followers: 26)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 2)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Atomization and Sprays     Full-text available via subscription   (Followers: 3)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 9)
Biochemistry     Full-text available via subscription   (Followers: 277)
Biochemistry Insights     Open Access   (Followers: 5)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 9)
Bioinspired Materials     Open Access   (Followers: 3)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 2)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access  
Biomacromolecules     Full-text available via subscription   (Followers: 18)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 10)
Biomedical Chromatography     Hybrid Journal   (Followers: 6)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 107)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 99)
Bioorganic Chemistry     Hybrid Journal   (Followers: 10)
Biopolymers     Hybrid Journal   (Followers: 18)
Biosensors     Open Access   (Followers: 2)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 1)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal   (Followers: 1)
C - Journal of Carbon Research     Open Access   (Followers: 2)
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Canadian Journal of Chemistry     Full-text available via subscription   (Followers: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 3)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 67)
Catalysis for Sustainable Energy     Open Access   (Followers: 6)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 7)
Cellulose     Hybrid Journal   (Followers: 7)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription   (Followers: 1)
ChemCatChem     Hybrid Journal   (Followers: 8)
Chemical and Engineering News     Free   (Followers: 12)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 69)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 23)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 19)
Chemical Reviews     Full-text available via subscription   (Followers: 165)
Chemical Science     Open Access   (Followers: 21)
Chemical Technology     Open Access   (Followers: 15)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 4)
Chemical Week     Full-text available via subscription   (Followers: 7)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 55)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 25)
ChemInform     Hybrid Journal   (Followers: 7)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 6)
Chemistry & Biology     Full-text available via subscription   (Followers: 30)
Chemistry & Industry     Hybrid Journal   (Followers: 5)
Chemistry - A European Journal     Hybrid Journal   (Followers: 136)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 15)
Chemistry and Materials Research     Open Access   (Followers: 17)
Chemistry Central Journal     Open Access   (Followers: 4)
Chemistry Education Research and Practice     Free   (Followers: 5)
Chemistry in Education     Open Access   (Followers: 9)
Chemistry International     Hybrid Journal   (Followers: 2)
Chemistry Letters     Full-text available via subscription   (Followers: 43)
Chemistry of Materials     Full-text available via subscription   (Followers: 189)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry-Didactics-Ecology-Metrology     Open Access  
ChemistryOpen     Open Access   (Followers: 2)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 2)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 8)
ChemPlusChem     Hybrid Journal   (Followers: 2)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 2)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 10)
Chromatographia     Hybrid Journal   (Followers: 23)
Chromatography Research International     Open Access   (Followers: 7)
Clay Minerals     Full-text available via subscription   (Followers: 9)
Cogent Chemistry     Open Access  
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 10)
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 8)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 3)
Combustion Science and Technology     Hybrid Journal   (Followers: 18)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 2)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 2)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 9)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 12)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 9)
Coordination Chemistry Reviews     Full-text available via subscription   (Followers: 2)
Copernican Letters     Open Access  
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 5)
Crystal Structure Theory and Applications     Open Access   (Followers: 3)
CrystEngComm     Full-text available via subscription   (Followers: 10)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Metabolomics     Hybrid Journal   (Followers: 4)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Research in Chemistry     Open Access   (Followers: 8)
Current Science     Open Access   (Followers: 48)
Dalton Transactions     Full-text available via subscription   (Followers: 18)
Detection     Open Access   (Followers: 2)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)
Diamond and Related Materials     Hybrid Journal   (Followers: 11)
Dislocations in Solids     Full-text available via subscription  
Doklady Chemistry     Hybrid Journal  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 3)
Eclética Química     Open Access   (Followers: 1)
Ecological Chemistry and Engineering S     Open Access   (Followers: 4)
Ecotoxicology and Environmental Contamination     Open Access  
Educación Química     Open Access   (Followers: 1)
Education for Chemical Engineers     Hybrid Journal   (Followers: 5)
EJNMMI Radiopharmacy and Chemistry     Open Access  
Elements     Full-text available via subscription   (Followers: 2)
Environmental Chemistry     Hybrid Journal   (Followers: 8)
Environmental Chemistry Letters     Hybrid Journal   (Followers: 4)
Environmental Science & Technology Letters     Full-text available via subscription   (Followers: 5)
Environmental Science : Nano     Partially Free   (Followers: 1)
Environmental Toxicology & Chemistry     Hybrid Journal   (Followers: 19)

        1 2 3 | Last

Journal Cover Chemical Research in Chinese Universities
  [SJR: 0.255]   [H-I: 17]   [3 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1005-9040 - ISSN (Online) 2210-3171
   Published by Springer-Verlag Homepage  [2329 journals]
  • Polymer solar cells with improved power conversion efficiency using
           solvent mixtures
    • Abstract: Abstract In this paper, the effects of solvent mixtures on the morphology, charge transport, and light trapping of poly[N-900-hepta-decanyl-2,7-carbazole-alt-5,5-(40,70-di-2-thienyl-20,10,30-benzothiadiazole)](PCDTBT) and [6,6]- phenyl C71-butyric acid methyl ester(PC71BM) based solar cells were investigated. As a good solvent for PCDTBT, o-dichlorobenzene(ODCB) was selected to mix with chloroform(CF), chlorobenzene(CB), and 1,2,4-Trichlorobenzene(TCB) for optimizing the morphology of the PCDTBT:PC71BM active layer. It can be found that the device performance of polymer solar cells(PSCs) has been greatly improved when using a optimal blend ratio. Especially, the PSCs fabricated via ODCB(90%)/CF(10%, volume fraction) mixture exhibit a remarkable enhancement of photon-to-current efficiency(PCE) from 5.16% to 7.47%. The enhanced performance of the PSCs can be attributed to the higher absorption, the lower resistance, and the optimized surface morphology of the active layers modified by the solvent mixtures.
      PubDate: 2017-06-01
  • Surface modification of polyamide66 fabric by grafting with
    • Abstract: Abstract Melt-dripping is always a big chanllenge in flame retardant finishing of synthetic fabrics. In this work, vinyltrimethoxysilane(VTMS) was introduced onto the polyamide66(PA66) surface by microwave grafting to improve the fire performance. The chemical structure of the grafted fabric was characterized by attenuated total reflection Fourier transformation infrared spectroscopy(ATR-FTIR) and X-ray photoelectron spectroscopy(XPS). The thermal stability analysis and flammability evaluation of the grafted samples by thermogravimetric analysis(TGA), cone calorimetry, vertical burning tests and limiting oxygen index(LOI) demonstrate that the presence of grafting chains significantly reduces the dripping tendency and decreases the heat release rate of polyamide66(PA66) fabric. The surface morphology observed by scanning electron microscope(SEM) indicates that VTMS can not only promote the formation of protective layers, which prevent the substrate from further thermal degradation, but also promote the char formation of PA66 substrate during combustion.
      PubDate: 2017-06-01
  • A new inorganic 2D framework based on Bi-bismuth-capping Keggin
           polyoxometalate with photodegradation and selective absorption of organic
    • Abstract: Abstract A new purely inorganic 2D framework, {PMo12O40Bi2(H2O)2}·4H2O(1), was synthesized under solvothermal condition and characterized by infrared(IR) spectroscopy, thermal gravimetric analysis, UV-Vis spectroscopy, powder X-ray diffraction and single-crystal X-ray diffraction. Structural analysis reveals that compound 1 consists of Keggin unit {PMo12O40} with two bismuth atoms capping two opposite pits, leading to the bi-bismuth-capping Keggin polyoxometalate. Compound 1 not only displays excellent photodegradation activity for methyl orange(MO), but also has a high absorption capacity for rhodamine B(RhB) and methylene blue(MB). Moreover, compound 1 is extremely stable and easily separated from the reaction system for reuse.
      PubDate: 2017-06-01
  • Preparation and tribological properties of Cu-doped muscovite composite
           particles as lubricant additive
    • Abstract: Abstract Cu-doped muscovite(Mu) composite particles, abbreviated as Mu/Cu, were prepared via liquid phase reduction method. The morphologies, phase composition and elementary distribution of the as-prepared Mu/Cu and raw muscovite particles were characterized by means of scanning electron microscope(SEM), X-ray diffraction(XRD) and energy dispersive spectrometry(EDS). The tirbological properties of Mu/Cu and Mu as lubricant additives in lithium grease were evaluated on a block-ring tribomachine. The roughness, 2D and 3D morphologies and elementary distribution of block worn surface were analyzed to explore the tribogical mechanism. The results show that muscovite are evenly coated by the cubic Cu nanoparticles in composite particles. Both Mu/Cu and Mu can effectively improve the tirbological properties of lithium grease and Mu/Cu exhibits better tribological performance than Mu. The friction coefficient of Mu/Cu is decreased by 69.2% as compared to that of lithium grease. The layer structure of muscovite is synergistic with Cu nanoparticles in contribution to the formation of lubricant film mainly consisting of O, Si, Fe, Cu as well as Al elements on the block worn surface thereby further reducing the friction and wear.
      PubDate: 2017-06-01
  • Preparation and characterization of two wood vinegars obtained from hull
           of spina date seed and shell of peanut
    • Abstract: Abstract Two new kind of wood vinegars(WVs) from the hull of spina date seed(HSDS) and the shell of peanut(PS) were prepared. 32 Major components in the two kind of WVs were identified and determined by gas chromatograph-mass spectrometery. The total phenolic content was determined and the antioxidant activity of the WV was measured. The total phenolic contents of PSWV and HSDSWV were 75.9 and 98.1 mg/L, respectively, when they were expressed as catechol equivalents. In 1,1-diphenyl-2-picrylhydrazyl assay, free radical scavenging activity of HSDSWV was also superior than that of PSWV. In addition, the antioxidant activities of the two kind of WVs exhibited a good positive correlation with total phenolic content, and the linear correlation coefficients ranged from 0.9594 to 0.9970. The two kind of WVs could be used in the fields of food and medicine due to their powerful antioxidant activities.
      PubDate: 2017-06-01
  • Direct quantitative determination of rare earth elements in REE-rich
           mineral powders by LA-ICP-MS
    • Abstract: Abstract For direct quantitative determination of rare earth elements(REE) in REE-rich minerals, a most acceptable reference material NIST 610 might be an alternative external calibration standard due to the lack of matrix-matched reference materials. Here, we aimed to develop an analytical method for direct quantitative determination of REE concentrations in REE-rich minerals via laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS). The results show that the REE concentrations measured via LA-ICP-MS using NIST 610 as an external standard are in good agreement with reference values with relative percentage difference(D r) mainly less than 15%. Overall, these results demonstrate that our proposed analytical method is robust and accurate for direct quantitative determination of REE concentrations in REE-rich minerals.
      PubDate: 2017-06-01
  • Simultaneous electrochemical determination of ascorbic acid, dopamine and
           uric acid based on reduced graphene oxide-Ag/PANI modified glassy carbon
    • Authors: Zhuo Guo; Xianke Luo; Yahui Li; Dongdi Li; Qinai Zhao; Mengmeng Li; Chi Ma; Yanting Zhao
      Abstract: Abstract An electrochemical method for simultaneous determination of ascorbic acid(AA), dopamine(DA) and uric acid(UA) was developed based on RGO-Ag/PANI modified glassy carbon electrode(RGO-Ag/PANI/GCE, RGO= reduced graphene oxide, PANI=polyaniline). Owing to the synergetic effect among RGO, Ag and PANI, the RGO-Ag/PANI based sensor not only improved the electrochemically catalytic oxidation of AA, DA and UA, but also resolved the overlapping anodic peaks. Under the optimized conditions, the calibration curves were obtained in the concentration ranges of 50—1000, 5—200 and 20—350 μmol/L, and the detection limits(S/N=3) of 0.5, 0.2 and 0.2 μmol/L were obtained for AA, DA, and UA, respectively, in neutral phosphate buffer solutions(PBS). The RGO-Ag/PANI/GCE sensor was successfully applied to the determination of AA, DA, and UA in bovine serum sam-ples and showed high selectivity, sensitivity, and reproducibility.
      PubDate: 2017-05-17
      DOI: 10.1007/s40242-017-6473-7
  • In vivo inhibitory effect of lentivirus-mediated RNA interference
           targeting RhoC on growth of SKOV3 cells
    • Authors: Ying Pan; Ke Wang; Yichen Liu; Rui Qin; Lu Cao; Jia Wang; Guanghong Zhou; Aichen Zhang
      Abstract: Abstract To investigate the inhibitory effect of lentivirus-mendiated RNA interference targeting RhoC on the growth of SKOV3 cells(ovarian cancer SKOV3 cells) in vivo, the vector expressing RNA interference targeting RhoC gene(LV-shRhoC) was constructed and the virus particles were packaged. The infection effiency of SKOV3 cells by the virus was estimated by green fluorescent protein expression on a fluorescence microscope and the expression of RhoC gene in the SKOV3 cells was detected by reverse transcription real time polymerase chain reaction(PCR). Fur-thermore, human ovarian cancer SKOV3 cells, empty vector infected SKOV3 cells and interfered-vector infected SKOV3 cells were respectively seeded into nude mice, and the shape, mass, volume and histophathological changes of the transplanted tumors were observed 20 d later the mice were sacrified. The results show that lentivirus packag-ing particles can effectively infect SKOV3 cells and the lentivirus-mediated RNA interference can significantly inhi-bit the expression of RhoC gene in SKOV3 cells, the mass and volume of the transplanted tumor in the mice of the specific-control group(Lv-shRhoC) are all lower than the corresponding ones in the mice of negative- and blank-control groups(Lv-NC and SKOV3). Moreover, the histopathlosical secion investigation shows that the nuclear Karyotype and histopathologic mitotic figure of SKOV3 cells in mice of the specific-control group are clearly lower than those in the mice of the negative-control group.Thus it is concluded that silencing RhoC gene by means of lenti-virus-mediated RNA interference targeting RhoC can obviously inhibit the growth of ovarian cancer cells(SKOV3) in vivo, which is a new strategy for the gene therapy of ovarian cancers.
      PubDate: 2017-05-17
      DOI: 10.1007/s40242-017-7090-1
  • Measurements and calculations of solid-liquid equilibria in the quaternary
           system Li 2 SO 4 -Na 2 SO 4 -K 2 SO 4 -H 2 O at 288 K
    • Authors: Ruizhi Cui; Lei Yang; Wei Wang; Shihua Sang
      Abstract: Abstract The isothermal dissolution equilibrium method has been used to investigate the solid and liquid equilibria of quaternary system Li2SO4-Na2SO4-K2SO4-H2O at 288 K. The phase diagram and water diagram were plotted according to the experiment results. It was found that Li2SO4-Na2SO4-K2SO4-H2O quaternary system contains four double salts at 288 K. There are six invariant points, twelve univariant curves and seven areas of crystallization: Li2SO4 H2O, Na2SO4 10H2O, K2SO4, Li2SO4 3Na2SO4 12H2O, Li2SO4 K2SO4, Na2SO4 3K2SO4, 2Li2SO4 Na2SO4 K2SO4. Using the equilibrium solubility data of the quaternary system at 288 K, the solubility product(lnK sp) of solid phase 2Li2SO4 Na2SO4 K2SO4, which is not reported was acquired. Based on the chemical model of Pitzer’s electrolyte solution theory, the solubilities for the quaternary system Li2SO4-Na2SO4-K2SO4-H2O at 288 K were calculated with corresponding parameters. Compared the results of experimental measurement with those of calculation, it was showed that the calculated values had a good agreement with the experimental ones.
      PubDate: 2017-05-13
      DOI: 10.1007/s40242-017-6275-y
  • Preparation of Cu-MgO catalysts via urea-nitrate combustion method and
           their catalytic performance in vapor phase hydrogenation of furfural
    • Authors: Licheng Wang; Tiantong Bu; Zhenlü Wang
      Abstract: Abstract A series of Cu-MgO catalysts was prepared via a urea-nitrate combustion method, and their catalytic performance was examined in the vapor phase hydrogenation of furfural. Characterization results showed that the amount of urea had important effects on the surface area, Cu dispersion and crystallite size of the catalysts. The Cu-MgO catalyst with a Cu loading of 12.1%(mass fraction) showed higher furfural conversion than the catalyst prepared by coprecipitation. The high activity was attributed to the higher dispersion of Cu on the catalyst surface. These results suggest that the combustion method is an efficient and simple route for the preparation of high activity Cu-MgO catalysts for furfural hydrogenation.
      PubDate: 2017-05-13
      DOI: 10.1007/s40242-017-6315-7
  • Chemiluminescent determination of cyromazine in milk samples using
           copper(III) chelate-Triton X-100 by flow injection analysis
    • Authors: Muhammad Asghar; Mohammad Yaqoob; Abdul Nabi
      Abstract: Abstract Cyromazine(CYR) was determined in milk samples using copper(III) chelate-Triton X-100 chemiluminescence(CL) system associated with flow-injection(FI) in KOH medium. The relative CL intensity for CYR concentration was linear over the range of 5×10–4―10 μg/mL(R 2=0.9990, n=11) with injection rate of 160 h–1 and the relative standard deviation(RSD, n=4) of 1.2%―2.6%. The limit of detection(LOD) for signal-to-noise ratio of 3 was 1.5×10–4 μg/mL. The influences of key chemical and physical parameters, some major fresh water ions at their maximum admissible concentrations and a number of pesticides were examined as potential interferences. The concentrations of CYR in spiked milk samples were successfully determined by the proposed method and the results were in good agreement with the previously reported HPLC method, having recovery range of (92±4)%―(106±2)%. The possible CL reaction mechanism for copper(III) complex-Triton X-100-CYR was also briefly discussed.
      PubDate: 2017-05-13
      DOI: 10.1007/s40242-017-6402-9
  • Preparation of CdTe nanocrystals doped fluorescent silica spheres by
           sol-gel method and their surface modification via thiol-ene chemistry
    • Authors: Yan Liu; Dongdong Yu; Wei Zhu; Xiao Bai; Qihui Shen; Xiaoyang Liu; Jianguang Zhou
      Abstract: Abstract A facile one-step sol-gel method was used to prepare CdTe nanocrystals(NCs) doped silica microspheres with luxuriant thiol group on their surface using 3-mercaptopropyl trimethoxysilane(MPTMS) as organosilane in the aqueous solution. As the ligand and organosilane, MPTMS ensured the doping efficiency of CdTe NCs by ligand exchange and a large thiol group exposed to the solution to activate the surface of silica microspheres. The remodeled sol-gel process was performed at a lower temperature, which protected the thiol groups from degradation. Meanwhile, the particle size and size distribution can be controlled by varying synthesis conditions, such as the stirring rate and the reaction temperature. This user-friendly method provides a platform for immobilization of chemical groups such as carboxyl for combination of bioactive and diagnostic molecules at the surface of CdTe NCs doped silica microspheres through thiol-ene chemistry for high-throughput microarrays.
      PubDate: 2017-05-13
      DOI: 10.1007/s40242-017-6496-0
  • Novel cinobufagin oxime ether derivatives as potential Na + /K + -ATPase
           inhibitors: Synthesis, biological screening and molecular docking
    • Authors: Guangping Liang; Tseyu Chung; Jinhua Guo; Rongrong Zhang; Wei Xü; Jason T. C. Tzen; Renwang Jiang
      Abstract: Abstract Some cinobufagin oxime ether derivatives as potential Na+/K+-ATPase inhibitors were synthesized by following the side chain of istaroxime. These compounds inhibit Na+/K+-ATPase in a dose-dependent manner. Compound 3c with an oxyethylamine side chain that is the same as that of istaroxime showed the most potent inhibition, which was stronger than compound 3a with only hydroxyoxime moiety at C-3 and compound 3b with a methylated hydroxyoxime moiety. Molecular docking was used to explore the binding modes of the target compounds with Na+/K+-ATPase, which suggested that the longer ethyl amine group at C-3 oxime moiety of compound 3c could make stronger interaction with Na+/K+-ATPase via intermolecular charge-charge and H-bond interaction as compared with other derivatives.
      PubDate: 2017-05-13
      DOI: 10.1007/s40242-017-6487-1
  • Selenium-catalyzed oxidative carbonylation of benzylamines to
    • Authors: Xiaopeng Zhang; Zhengwei Li; Ping Wang; Xuesen Fan; Guisheng Zhang
      Abstract: Abstract A facile, efficient and cost-effective approach to 1,3-dibenzylurea is reported. With cheap and recyclable nonmetal selenium as a catalyst, carbon monoxide instead of phosgene derivatives as a carbonylation agent, oxygen as an oxidant, the selenium-catalyzed oxidative carbonylation reaction of benzylamines can proceed efficiently in one-pot manner in the presence of triethylamine to afford the desired 1, 3-dibenzylureas mostly in moderate to excellent yields. Selenium catalyst can be easily recovered due to its phase-transfer catalytic function and recycled.
      PubDate: 2017-05-13
      DOI: 10.1007/s40242-017-6427-0
  • Activation of persulfate by magnetic MnFe 2 O 4 -bentonite for catalytic
           degradation of 2,4-dichlorophenol in aqueous solutions
    • Authors: Yongsheng Zhao; Qin Li; Hejun Ren; Rui Zhou
      Abstract: Abstract Magnetic MnFe2O4-bentonite was synthesized by chemical co-precipitation method(CCM) and applied as catalyst in heterogeneous activation of persulfate(PS) to oxidize a target pollutant, 2,4-dichlorophenol(2,4-DCP), in aqueous solutions. The surface morphology and structure of MnFe2O4-bentonite were characterized by X-ray diffraction( XRD), scanning electron microscope(SEM), energy dispersive X-ray(EDX) and X-ray photoelectron spectroscopy(XPS) analyses.The catalytic activity of MnFe2O4-bentonite for 2,4-DCP degradation was evaluated considering the effects of various process parameters, such as mass ratio of MnFe2O4 to bentonite, concentration of catalyst, PS concentration, and pH. The MnFe2O4-bentonite hybrid exhibited higher catalytic activity than pure MnFe2O4. Treatment with 5 g/L MnFe2O4-bentonite at 30 °C for 240 min oxidized 92% of 100 mg/L 2,4-DCP(70.2% mineralization), whereas treatment with pure MnFe2O4 under the same condition oxidized only 70% of the pollutant. This result indicate the enhanced performance of the activated PS. Moreover, MnFe2O4-bentonite exhibits stable performance with minimal loss in activity after five successive runs. Thus, MnFe2O4-bentonite could be a promising catalyst in oxidative degradation of 2,4-DCP.
      PubDate: 2017-05-13
      DOI: 10.1007/s40242-017-6485-3
  • Thermodynamic and phase diagram modeling of the CsF-MF 4 (M=U, Th) systems
    • Authors: Xiang Li; Kun Wang; Mengya Xie; Zhu Wu; Leidong Xie
      Abstract: Abstract Phase diagrams for the CsF-UF4 and CsF-ThF4 systems were modeled in the present work through com-putational thermodynamics. The associate solution model with various complex species(CsMF5, Cs2MF6 and Cs3MF7; M=Th, U) was used to thermodynamically describe the binary molten salts. A total of ten intermediate phases were treated as stoichiometric compounds with their Gibbs energies modeled according to the Neumann-Kopp rule. All these model parameters were optimized by the least squares procedure until good coincidence was achieved between the calculated results and most of the experimental data. The derived thermodynamic parameters will be merged into the multicomponent CsF-LiF-BeF2-ThF4-UF4 database for analyzing physicochemical behavior of CsF in the fuel salt of the molten salt breeder reactor.
      PubDate: 2017-05-11
      DOI: 10.1007/s40242-017-6282-z
  • Therapeutic drug monitoring of vancomycin and voriconazole by liquid
           chromatography-tandem mass spectrometric method
    • Authors: Yanyan Li; Lei Yin; Yanhua Li; Zhihui Sun; Xiaojun Zhao; Mingyue Gao; Hongliang Wang
      Abstract: Abstract A reliable liquid chromatography-tandem mass spectrometric(LC-MS/MS) method was developed and validated for the simultaneous determination of vancomycin and voriconazole in human plasma. The analytes and internal standard 10-hydroxycarbazepine were separated at a flow rate of 0.9 mL/min using a Zorbax SB-C18 column (50 mm×4.6 mm, 2.7 μm). Positive ion electrospray ionization was used to detect vancomycin, voriconazole and intrenal standard(IS) 10-hydroxycarbazepine followed by multiple reaction monitoring(MRM) of the transition at m/z 725.5→144.2, 350.3→281.0 and 253.1→208.0, respectively. The total run time for both vancomycin and voriconazole samples was 5 min; 0.30 μg/mL was the lower limit of quantification. The precision of intraday and interday was no more than 12.4%. The method was successfully and resoundingly applied in therapeutic drug monitoring of 156 patients treated with vancomycin and voriconazole.
      PubDate: 2017-05-11
      DOI: 10.1007/s40242-017-7051-8
  • Synthesis and structure-activity relationships of novel neocryptolepine
    • Authors: Ahmed A. El-Gokha; Nader M. Boshta; Mona K. Abo Hussein; Ibrahim El-T. El Sayed
      Abstract: Abstract Herein we reported the synthesis of a novel series of neocryptolepine(5-methyl-5H-indolo[2,3-b]quinoline) derivatives containing different substituents at C11 using methyl 1H-indole-3-carboxylate and N-methylaniline as starting material. The target 21 compounds were evaluated for their antibacterial activity in vitro against gram-positive bacteria(B. subtilis and S. aureus) and gram-negative bacteria(E.coli and S. typhi). Almost all the tested compounds showed moderate to high activities against the four bacterial strains at the minimum inhibitory concentrations(MICs) of 1—10 μg/mL. The obtained results suggest that part of the novel synthetic neocryptolepine derivatives exhibit significant antibacterial effect against all the tested organisms.
      PubDate: 2017-05-11
      DOI: 10.1007/s40242-017-6502-6
  • Influence of metal cations and cholesterol on the lipid-amphotericin
    • Authors: Juan Wang; Runguang Sun; Changchun Hao; Tuo Li; Yuan Tian; Lei Zhang
      Abstract: Abstract Amphotericin B(AmB) has been widely used in antifungal therapy. AmB molecules combine with cholesterol to form pores that can be toxic to human cells, thus greatly limiting its clinical application. The interaction between AmB and the cell membrane may be influenced by potassium, sodium and calcium ions. In this study, the bilayer in large unilamellar lipid-drug liposomes with or without cholesterol was employed as a model membrane. N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)-1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine(NBD-PE) and 1-palmitoyl-2-[6-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)aminodoclecanoyl]-sn-glysero-3-phosphocholine(6-NBD-PC) are two kinds of fluorescent lipid probes, and the NBD group is attached to the polar lipid headgroup in the former, but to the sn-2 fatty acyl chain in the latter. The effect of these metal cations on the lipid-drug membrane was monitored by red edge excitation shift(REES), fluorescence polarization, and the fluorescence lifetime of lipid probes in hydrophilic and hydrophobic areas of the membrane. These ions have different effects on the lipid-AmB membrane. Cholesterol can strengthen the packing ability of the membrane, which is influenced differently by potassium, sodium and calcium ions. Moreover, the influence of these ions on the membrane may be relative to the method of ion transportation through the membrane. This study is significant to understand the reduction of AmB’s cellular toxicity.
      PubDate: 2017-05-11
      DOI: 10.1007/s40242-017-6303-y
  • Synthesis of CdS/m-TiO 2 mesoporous spheres and their application in
           photocatalytic degradation of rhodamine B under visible light
    • Authors: Shu Cui; Xuesong Li; Yanjuan Li; Haixin Zhao; Yuanyuan Wang; Nan Li; Xiaotian Li; Guodong Li
      Abstract: Abstract CdS/m-TiO2 heteroarchitecture with CdS nanocrystals loaded on mesoporous TiO2(m-TiO2) spheres was successfully synthesized via sol-gel method followed by solvothermal treatment. The material with uniform diameter of ca. 750 nm possesses regular mesoporous structure and large specific surface area of 100.5 m2/g. When used to photodegradate Rhodamine B(RB) under visible light, the CdS/m-TiO2 heteroarchitecture exhibits improved photo-catalytic performance in comparison with pure m-TiO2 or CdS. The excellent photocatalytic activity is closely related to the facilitated separation of electron-hole pairs derived from the CdS/m-TiO2 heterojunction and mesoporous structure with high specific surface area and adequately exposed active sites.
      PubDate: 2017-05-10
      DOI: 10.1007/s40242-017-6377-6
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Heriot-Watt University
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