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  Subjects -> CHEMISTRY (Total: 845 journals)
    - ANALYTICAL CHEMISTRY (51 journals)
    - CHEMISTRY (595 journals)
    - CRYSTALLOGRAPHY (21 journals)
    - ELECTROCHEMISTRY (25 journals)
    - INORGANIC CHEMISTRY (41 journals)
    - ORGANIC CHEMISTRY (45 journals)
    - PHYSICAL CHEMISTRY (67 journals)

CHEMISTRY (595 journals)                  1 2 3 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 8)
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: 34)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 18)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 23)
ACS Macro Letters     Full-text available via subscription   (Followers: 24)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 39)
ACS Nano     Full-text available via subscription   (Followers: 245)
ACS Photonics     Full-text available via subscription   (Followers: 11)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 21)
Acta Chemica Iasi     Open Access   (Followers: 2)
Acta Chimica Sinica     Full-text available via subscription   (Followers: 1)
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: 8)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 5)
Advanced Functional Materials     Hybrid Journal   (Followers: 51)
Advanced Science Focus     Free   (Followers: 3)
Advances in Chemical Engineering and Science     Open Access   (Followers: 56)
Advances in Chemical Science     Open Access   (Followers: 13)
Advances in Chemistry     Open Access   (Followers: 15)
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: 9)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 16)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 9)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 21)
Advances in Nanoparticles     Open Access   (Followers: 15)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15)
Advances in Polymer Science     Hybrid Journal   (Followers: 41)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 17)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 20)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Science and Technology     Full-text available via subscription   (Followers: 12)
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: 67)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 14)
American Journal of Chemistry     Open Access   (Followers: 27)
American Journal of Plant Physiology     Open Access   (Followers: 14)
American Mineralogist     Hybrid Journal   (Followers: 14)
Analyst     Full-text available via subscription   (Followers: 40)
Angewandte Chemie     Hybrid Journal   (Followers: 193)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 218)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 4)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 3)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 4)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 8)
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: 15)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Hybrid Journal  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 7)
Applied Spectroscopy     Full-text available via subscription   (Followers: 23)
Applied Surface Science     Hybrid Journal   (Followers: 28)
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: 4)
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: 10)
Biochemistry     Full-text available via subscription   (Followers: 309)
Biochemistry Insights     Open Access   (Followers: 6)
Biochemistry Research International     Open Access   (Followers: 6)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 9)
Bioinspired Materials     Open Access   (Followers: 5)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 2)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 1)
Biomacromolecules     Full-text available via subscription   (Followers: 19)
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: 5)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 117)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 91)
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: 3)
Cakra Kimia (Indonesian E-Journal of Applied Chemistry)     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 3)
Canadian Journal of Chemistry     Hybrid Journal   (Followers: 10)
Canadian Mineralogist     Full-text available via subscription   (Followers: 4)
Carbohydrate Research     Hybrid Journal   (Followers: 26)
Carbon     Hybrid Journal   (Followers: 66)
Catalysis for Sustainable Energy     Open Access   (Followers: 7)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 7)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 8)
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: 14)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 72)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 24)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 20)
Chemical Reviews     Full-text available via subscription   (Followers: 182)
Chemical Science     Open Access   (Followers: 22)
Chemical Technology     Open Access   (Followers: 16)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 5)
Chemical Week     Full-text available via subscription   (Followers: 8)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 58)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 26)
ChemInform     Hybrid Journal   (Followers: 8)
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: 147)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 15)
Chemistry and Materials Research     Open Access   (Followers: 20)
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: 44)
Chemistry of Materials     Full-text available via subscription   (Followers: 251)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 9)
Chemistry World     Full-text available via subscription   (Followers: 22)
Chemistry-Didactics-Ecology-Metrology     Open Access   (Followers: 1)
ChemistryOpen     Open Access   (Followers: 2)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 4)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 9)
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: 24)
Clay Minerals     Full-text available via subscription   (Followers: 10)
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: 7)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
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: 3)
Copernican Letters     Open Access   (Followers: 1)
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 5)
Crystal Structure Theory and Applications     Open Access   (Followers: 4)
CrystEngComm     Full-text available via subscription   (Followers: 13)
Current Catalysis     Hybrid Journal   (Followers: 2)
Current Metabolomics     Hybrid Journal   (Followers: 5)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 9)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 17)
Current Research in Chemistry     Open Access   (Followers: 8)
Current Science     Open Access   (Followers: 61)
Dalton Transactions     Full-text available via subscription   (Followers: 23)
Detection     Open Access   (Followers: 2)
Developments in Geochemistry     Full-text available via subscription   (Followers: 2)
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Dislocations in Solids     Full-text available via subscription  
Doklady Chemistry     Hybrid Journal  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 4)
Eclética Química     Open Access   (Followers: 1)
Ecological Chemistry and Engineering S     Open Access   (Followers: 3)
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: 3)
Environmental Chemistry     Hybrid Journal   (Followers: 7)
Environmental Chemistry Letters     Hybrid Journal   (Followers: 4)
Environmental Science & Technology Letters     Full-text available via subscription   (Followers: 5)

        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  [2352 journals]
  • Analysis and identification of chemical constituents of fenugreek by
           UPLC-IT-MS n and UPLC-Q-TOF-MS
    • Authors: Jiaqi Wang; Wenyue Jiang; Zhongying Liu; Junhua Wang; Tianyue Fu; Yongsheng Wang
      Pages: 721 - 730
      Abstract: Fenugreek, a traditional Chinese medical plant, has been widely used as food ingredients because of its outstanding medicinal qualities. The hypoglycemic activity of fenugreek is one of its important pharmacological properties. Both of saponin and flavonoid components have the hypoglycemic activity and their contents in fenugreek are 4%—8% and 1%—2%, respectively. This paper focused on these two types of components to carry out purification research and chemical analysis. The heating reflux extraction method and macroporous resin purification method were designed to prepare the saponins and the flavonoids components from defatted fenugreek seeds. Petroleum ether ultrasonic skim and 70% ethanol refluxing were used for the extraction of saponins and flavonoid from fenugreek. The column of DM130 macroporous resin and D101 macroporous resin were respectively used to prepare fenugreek saponin and flavonoid components, and the total contents of them were 78.56% and 62.28%, respectively. The saponin and flavonoids were subsequently analyzed by an ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS) along with an ultra-performance liquid chromatography and ion-trap tandem mass spectrometry(UPLC-IT-MS n ). As a result, 57 saponins and 19 flavonoid compounds were characterized. The obtained results will provide a theory basis for further research on fenugreek, as well as research and development of hypoglycemic new drugs.
      PubDate: 2017-10-01
      DOI: 10.1007/s40242-017-7136-4
      Issue No: Vol. 33, No. 5 (2017)
       
  • Total synthesis and biological evaluation of Wewakazole
    • Authors: Bohua Long; Jingzhao Zhang; Xueyan Wang; Xudong Tang; Zhengzhi Wu
      Abstract: The total synthesis of Wewakazole was achieved on a gram scale, unambiguously confirming its structure. Three different substituted oxazoles present in this natural product were prepared efficiently. Biological evaluation indicated that Wewakazole significantly inhibited cancer cell proliferation in a dose-dependent manner.
      PubDate: 2017-11-08
      DOI: 10.1007/s40242-017-7129-3
       
  • Double-lipase catalyzed synthesis of kojic dipalmitate in organic solvents
    • Authors: Zhiyuan Wang; Wen Luo; Junying Fu; Zhibing Li; Zhongming Wang; Pengmei Lü
      Abstract: Kojic dipalmitate(KDP) was synthesized by the way of esterification of palmitic and kojic acids in organic solvent, with double-lipase as the biocatalyst. Four commercially available lipases(Amano PS, Novozym 435, Lipozyme TL IM and Lipozyme RM IM) were used to group six double-lipase combinations. These combinations were studied and Amano PS-Novozym 435 was found to have the best efficiency and was selected for optimizing the reaction conditions. The optimal reaction conditions were that the mass ratio of Amano PS to Novozyme 435 1:1.5, stirring speed of 500 r/min, substrates molar ratio of 1:2, 50 °C, 5%(mass fraction) catalyst dosage of kojic acid quantity and using acetone as co-solvent. Under these conditions, the diesterification of C5 and C7 hydroxyl groups of kojic acid molecule could be well catalyzed by double-lipase and realize a high KDP yield of 85%.
      PubDate: 2017-11-08
      DOI: 10.1007/s40242-017-7048-3
       
  • Design, synthesis and insecticidal evaluation of novel N
           -pyridylpyrazolecarboxamide derivatives containing isoxazole, isoxazoline
           and 1, 3, 4-thiadiazole rings
    • Authors: Xuewen Hua; Chen Liu; Sha Zhou; Minggui Chen; Lixia Xiong; Yongqiang Li; Zhengming Li
      Abstract: With the introduction of various heterocyclic rings at the benzene part of anthranilic diamides, a series of N-pyridylpyrazolecarboxamide derivatives containing isoxazole, isoxazoline and 1,3,4-thiadiazole rings was designed, synthesized and evaluated for their insecticidal activities. The structures of the obtained novel target compounds were confirmed by means of 1H NMR, 13C NMR and HRMS. The bioassay results indicated that most of the target com-pounds displayed moderate or good insecticidal activities against oriental armyworm and diamondback moth at the adopted concentrations compared with chlorantraniliprole, especially compounds Ii and Il, of which the LC50 and LC95 values against oriental armyworm were further measured. The structure-activity relationship demonstrated that the introduction of chlorine in benzene ring, bromomethyl and acetoxyl substituents in 4,5-dihydroisoxazole part was more advantageous to improve the corresponding insecticidal activities than the introduction of other substituents and heterocycles.
      PubDate: 2017-11-08
      DOI: 10.1007/s40242-017-7147-1
       
  • Tuning shell thickness of MnO/C core-shell nanowires for optimum
           performance of lithium-ion batteries
    • Authors: Dan Zhang; Guangshe Li; Jianming Fan; Baoyun Li; Liping Li
      Abstract: MnO/C core-shell nanowires with varying carbon shell thickness were synthesized via calcining resorci-nol-formaldehyde resin(RF) with different amounts of hydrothermally synthesized MnO2 nanowires. The relationship between the carbon shell thickness and the anode performance of the MnO/C materials was discussed. With a suitable carbon shell thickness(6.8 nm), the MnO/C core-shell nanowires exhibit better cycling and rate performance than those with a smaller or larger thickness. The TEM results show that after 50 cycles, the core-shell structure with this thickness can be retained, which leads to superior performance. This contribution provides a significant guiding model for optimizing the electrochemical performance of MnO/C core-shell materials by controlling the thickness of carbon shells.
      PubDate: 2017-11-07
      DOI: 10.1007/s40242-017-7223-6
       
  • Preparation of β -cyclodextrin/Fe 3 O 4 /polyvinylpyrrolidone composite
           magnetic microspheres for the adsorption of methyl orange
    • Authors: Qingbo Si; Qian Wen; Qingbiao Yang; Yan Song; Yaoxian Li
      Abstract: Magnetic microspherical β-cyclodextrin(CD)/Fe3O4@polyvinylpyrrolidone(PVP) particles, in which embedded Fe3O4 particles were coated by β-CD/glutaraldehyde crosslinked PVP, were synthesized via electrostatic spray and thermal crosslinking technologies. The magnetic microspheres were characterized by infrared spectroscopy, X-ray diffraction, scanning electron microscopy(SEM) and magnetic measurements, and the adsorption performance of the β-CD/Fe3O4@PVP composite nanoparticles for methyl orange was studied. The results show that the β-CD/Fe3O4@PVP microspheres could be quickly separated from the adsorption system under an external magnetic field within 30 s and that the adsorption capacity of the microspheres for methyl orange reaches greater than 90%, with a maximum adsorption quantity of 47.62 mg/g.
      PubDate: 2017-11-07
      DOI: 10.1007/s40242-017-7083-0
       
  • Physicochemical properties of Bi-containing ionic liquid analogs based on
           choline chloride
    • Authors: Luxia Bu; Daying Liu; Zhen Wei; Zhanlin Ma
      Abstract: The preparation and characterization of homogeneous and colorless ionic liquid analogs(ILAs) containing choline chloride(ChCl), malonic acid and bismuth chloride were investigated. The structure of the above mixture was preliminarily analyzed, and then the physicochemical properties including viscosity, conductivity and density were investigated as functions of temperature and composition. Additionally, the thermal stability of the ILAs and the electrochemical behavior of Bi3+ ions in the medium were studied. Structure analysis reveals that the synthesis of deep eutectic solvents(DESs) is closely related to the formation of hydrogen bonds between malonic acid and ChCl, with their viscosity, conductivity and density being greatly dependent on the temperature and composition. Thermo-gravimetric analysis demonstrates that the ILAs are very stable between room temperature and 398.15 K. And the electrochemical experiments indicate that the bismuth films can be successfully deposited from this ILAs and the deposition mechanism of bismuth is a rather irreversible process. The surface morphology of bismuth films deposited on Cu substrates was very compact and smooth. Thus, ChCl-malonic acid DESs were shown to be a good alternative to aqueous solvents for various deposition-related applications.
      PubDate: 2017-11-07
      DOI: 10.1007/s40242-017-7170-2
       
  • PVA/PEG hybrid hydrogels prepared by freeze-thawing and high energy
           electron beam irradiation
    • Authors: Chunming Zhao; Xueting Lu; Qianqian Hu; Shuai Liu; Shuang Guan
      Abstract: In this paper, poly(vinyl alcohol)(PVA) and PVA/poly(ethylene glycol)(PEG) hybrid hydrogels were syn-thesized by freeze-thawing or freeze-thawing followed by high energy electron beam irradiation. The influence of PEG molecular weight, mass ratios of PVA to PEG, thawing temperature and number of freeze-thawing(FT) cycles on the mechanical strength of PVA/PEG hydrogel was investigated. Also, the thermal behaviors were examined by dif-ferential scanning calorimetry(DSC) and the microstructures were observed with scanning electron microscopy(SEM). The results suggest that the addition of PEG improves the mechanical strength of PVA hydrogel and the irradiation reduces both the strength of PVA/PEG hydrogel slightly and the degree of crystallinity. The improved properties suggest that PVA/PEG hydrogel can be a good candidate for the application in the biomedical.
      PubDate: 2017-11-07
      DOI: 10.1007/s40242-017-7107-9
       
  • Moisture absorption and mechanical properties of chemically modified
           linen/polypropylene composites
    • Authors: Qiuxue Hu; Li Li; Wenling Yan; Qi Zhao; Niaona Zhang; Yumei Zhang; Jinbiao Dong; Baijun Liu; Wei Hu
      Abstract: To decrease the moisture absorption and improve the mechanical properties of linen/polypropylene(PP) composites, linen was modified with silane N-[3-(trimethoxysilyl) propyl]ethylenediamine(AAPTS), surfactant tri-methyloctadecylammonium bromide(STAB), and both AAPTS and STAB, respectively. Fourier transform infra-red(FTIR) spectra showed that the linen was successfully modified and alkyl chains were attached through different treatments. The linen and PP were compounded by melt compressing. The moisture absorption of linen was decreased after STAB and AAPTS-STAB modifications. The moisture absorption, mechanical property and thermal property of the composites were also characterized. The results show that the moisture absorption of the AAPTS-modified li-nen(F1) reinforced PP(PPF1) is 8.09%, which is higher than that of the unmodified linen reinforced PP(PPF)(7.89%). The moisture absorption of the STAB-AAPTS-modified linen(F3) reinforced PP(PPF3) is 6.58%. The tensile strengths of PPF1 and PPF3 are 33.7 and 35.8 MPa, which are improved by 22.5% and 30% compared with that of PPF(27.5 MPa), respectively. Nevertheless, the moisture absorption of the STAB-modified linen(F2) reinforced PP(PPF2) is decreased by 22.4%, and the tensile strength is improved by 30% compared with those of PPF. Scanning electron microscopy(SEM) analysis of the fractured surface confirms the good interfacial adhesion of PPF2 compared with those of other composites. Furthermore, the 5% mass loss temperatures of the composites are all higher than 290 °C. Thus, linen modified with STAB is a promising reinforcement for biocomposites.
      PubDate: 2017-11-07
      DOI: 10.1007/s40242-017-7097-7
       
  • Preparation of zinc-nickel-cobalt ternary oxide nanosheets as electrodes
           in supercapacitors
    • Authors: Xue Shi; Guowei Zhou
      Abstract: Novel zinc-nickel-cobalt ternary oxide nanosheets were successfully synthesized via an easy solvothermal method followed by calcination and were tailored to have different numbers of wrinkles by controlling the volume ratio of the components in the mixed solvent. Nanosheets with more wrinkles yielded a large specific surface area(111.61 m2/g), which improved their electrochemical properties. The resulting products were characterized using a three-electrode system in 6 mol/L KOH electrolyte solution. With unique structures, the nanosheets with more wrinkles displayed a good capacitive behavior and an excellent specific capacitance retention of 97.18% after 2000 continuous charge-discharge cycles. Considering their high electrochemical performance and simple fabrication, we proposed that these unique zinc-nickel-cobalt oxide nanosheets are promising supercapacitor electrodes for energy storage applications.
      PubDate: 2017-11-07
      DOI: 10.1007/s40242-017-7124-8
       
  • Structure and enhanced antifungal activity of a divalent cobalt(II)
           complex with hexaconazole
    • Authors: Jinhua Zhou; Jingjing Li; Jie Li; Guoyu Ren; Yinghui Ren; Haixia Ma
      Abstract: A new CoII complex, [CoL4Cl2]·2CH3CH2OH(L=hexaconazole), was synthesized and characterized by means of elemental analysis, infrared spectroscopy and single-crystal X-ray diffraction. The crystal structural analysis shows that the centrosymmetric Co2+ is coordinated by four hexaconazole ligands and two Cl‒ to form a distorted octahedral geometry. The complex forms 1D chains through the intermolecular hydrogen bonds interaction of O―H···O and O―H···Cl. Furthermore, the antifungal activities of the complex against Grape anthracnose(I), Bo-tryosphaeria berengriana(II), Botryosphaeria ribis(III) and Wheat gibberellic(IV) have been investigated and com-pared with those of the corresponding ligand. The results show that the complex has better antifungal activity than the ligand, which indicates that the coordination of the ligand and the metal enhances the antimicrobialactivity.
      PubDate: 2017-11-07
      DOI: 10.1007/s40242-017-7108-8
       
  • Preparation of molecularly imprinted sericin/poly(vinyl alcohol)
           electrospun fibers for selective removal of methylene blue
    • Authors: Rui Zhao; Xiang Li; Bolun Sun; Yumei Li; Yanzi Li; Ce Wang
      Abstract: Sericin(SS), as an abundant and renewable resource in nature, has been proven to be a good adsorbent for metal ions or organic dyes removal. In this study, glutaraldehyde vapor cross-linked sericin-based electrospun fiber adsorbent was developed for the removal of methylene blue(MB) from wastewater. To overcome the problem of decreasing adsorption capacity by excessive functional group cross-linking, MB-imprinted sericin/poly(vinyl alcohol) (PVA) electrospun fiber adsorbent was prepared. Biocompatible PVA was added to the electrospinning solution to improve the spinnability and mechanical property. Scanning electron microscopy(SEM), Fourier transforms infrared spectroscopy(FTIR), and so forth were used to confirm their structures and composition. The adsorption performance toward the template molecule MB, including pH effect, adsorption isotherm, adsorption kinetics, adsorption selectivity, and reusability, was investigated. By comparison with non-imprinted sericin/PVA electrospun fibers, MB-imprinted sericin/PVA electrospun fiber adsorbent showed an enhanced and selective adsorption capacity toward MB with a good regeneration and recycling ability. The adsorption test suggests that the resulting MB-imprinted sericin/PVA electrospun fibers are promising adsorbents for MB removal from aqueous system.
      PubDate: 2017-11-07
      DOI: 10.1007/s40242-017-7115-9
       
  • Ultrasonic-assisted mesoporous silica nanoparticle-mediated exogenous gene
           stable expression in tobacco
    • Authors: Zhongni Wang; Huijing Liu; Luhua Li; Quanliang Li; Xiuran Wang; Yuan Jiang; Yuqin Fu; Changli Lü
      Abstract: Although nanotechnology is considered to be one of the most important technologies to promote social and economic development in the twenty-first century, its application in agriculture is relatively few compared with those in other fields. In this article, plasmid carrying GUS gene was successfully delivered into tobacco(Nicotiana tabacum) by mesoporous silica nanoparticles(MSNs) modified with positively charged poly-L-lysine(PLL) with the assist of ultrasonic method. Stable transformation was confirmed by polymerase chain reaction(PCR) detection and GUS histochemical staining. Meanwhile, we also studied the factors that could enhance the genetic transformation efficiency. The result suggests that the callus receptor and a suitable DNA/MSNs ratio contribute a lot to the transformation efficiency. In a word, our research provides an efficient and cost-effective method for gene delivery to plant.
      PubDate: 2017-11-07
      DOI: 10.1007/s40242-017-7240-5
       
  • Circular cationic compounds B 3 Rg n + of triangular ion B 3 + trapping
           rare gases
    • Authors: Ruiwen Zhang; Anyong Li; Zhuozhe Li
      Abstract: The circular cationic compounds B3Rg n +(n=1—3, Rg=He—Rn) formed by the electron-deficient aromatic ion B3 + trapping rare gases were studied theoretically. The formed B—Rg bond has large bonding energy in the range of 60—209 kJ/mol, its length is close to the sum of covalent radii of B and Rg, for Ar—Rn. The analyses based on the natural bond orbitals and electron density topology show that the B—Rg bonds for Ar—Rn have strong covalent character. The geometric structures, binding energy, bond nature and thermodynamic stability of the boron-rare gas compounds show that these species for Ar—Rn may be experimentally available. Several different theoretical studies have demonstrated that these triangular cations are aromatic.
      PubDate: 2017-11-02
      DOI: 10.1007/s40242-017-7054-5
       
  • Effects of ZnO nanoparticles on rat glioma C6 cells
    • Authors: Jing Su; Mingyue Yu; Zhen Lin; Hang Zhao; Haiyan Liu
      Abstract: Zinc oxide nanoparticles(ZnO NPs) are among the most commonly utilized nanomaterials. They are used in a wide range of applications, including medicine, sunscreens, cosmetics, paints, catalysis, electronics, as well as biosensors, and hence, it is crucial to illustrate their biological effects and risks. In the present study, the effects and mechanism of ZnO NPs(≤5 nm) were investigated in rat glioma C6 cells in vitro. The results of transmission elec-tron microscopy(TEM) and X-ray diffraction(XRD) show that ZnO NPs are pure with a uniform diameter of ca. 5 nm. 3-(4,5-Dimethylthiazol-2yl)-2,5-diphenyltetrazolium bromide(MTT) assays on C6 cells show that ZnO NPs, at dif-ferent concentrations(0―5 μg/mL), can induce significant cytotoxicity in C6 cells in a dose-dependent manner. An increased level of reactive oxygen species(ROS), a decreased level of glutathione(GSH), and an elevated level of glutathione disulfide(GSSG) and the toxicity mechanism are primarily attributed to the induced cellular oxidative stress. 4′,6-Diamidino-2-phenylindole(DAPI) staining was used to observe the apoptosis. The results show that C6 cells treated with the ZnO NPs at various concentrations(0, 1.25, 2.5 and 5 μg/mL) can induce apoptosis in a dose-dependent manner. These results suggest that ZnO NPs are the killers of the rat glioma C6 cells, and oxidative stress is the underlying mechanism of this process.
      PubDate: 2017-11-02
      DOI: 10.1007/s40242-017-7251-2
       
  • Rational design of Ag nanocubes-reduced graphene oxide nanocomposites for
           high-performance non-enzymatic H 2 O 2 sensing
    • Authors: Ye Ji; Tianyi Han; Yong Zhang; Ziying Wang; Tong Zhang; Jiyan Leng
      Abstract: Ag nanocubes-reduced graphene oxide(AgNCs-rGO) nanocomposite was successfully prepared by an in situ synthesis method, in which AgNCs were loaded onto the surface of rGO during the formation of AgNCs in an ethylene glycol solution. Characterization by X-ray diffraction, UV-Vis spectroscopy, and scanning electron micro-scopy indicated the successful preparation of the AgNCs-rGO nanocomposite. Most importantly, the AgNCs-rGO nanocomposite exhibited excellent electrocatalytic activity for the reduction of H2O2, leading to a high-performance non-enzymatic H2O2 sensor with a linear detection range and detection limit of approximately 0.1 mmol/L to 70 mmol/L(r=0.999) and 0.58 μmol/L, respectively. Our present work provides a new and highly efficient method for fabricating high-performance electrochemical sensors.
      PubDate: 2017-11-02
      DOI: 10.1007/s40242-017-7118-6
       
  • Thermodynamic Description of the MCl 2 -ThCl 4 (M: Mg, Ca, Sr, Ba) Systems
    • Authors: Mengya Xie; Xiang Li; Yaping Ding; Guoxin Zhang
      Abstract: The phase equilibria for the MCl2-ThCl4(M: Mg, Ca, Sr, Ba) binary systems were critically evaluated and optimized based upon the CALPHAD approach. The substitutional solution model(SSM) was used to describe the liquid phase. All the intermediate compounds were treated as stoichiometric compounds of which Gibbs energies comply with the Neumann-Kopp rule. Thermodynamic model parameters optimization for respective phases was conducted by the least squares minimization procedure with required input data available from experimental mea-surements. Satisfactory agreements between all calculated results and experimental data were achieved which demonstrates that thermodynamic databases for the MCl2-ThCl4(M: Mg, Ca, Sr, Ba) binary systems were ultimately derived in the present work allowing safe extrapolation into multi-component system for guiding relative industrial applications.
      PubDate: 2017-09-13
      DOI: 10.1007/s40242-017-7033-x
       
  • Two new baccharane glycosides from seeds of Impatientis balsamina L. with
           In vitro growth inhibitory activity in human cancer A375 cells
    • Authors: Qian Wu; Yongri Jin; Hua Yao; Ying Liu; Peng Li; Xuwen Li
      Abstract: Two new baccharane-type glycosides (1 and 2), together with seven known baccharane-type glycosides (3―9) hosenkoside A, hosenkoside B, hosenkoside C, hosenkoside F, hosenkoside M, hosenkoside K and hosenko-side G were isolated from the dried seeds of Impatientis balsamina L. The new baccharane-type glycosides were identified as honsenkol A-3-O-β-D-glucopyranosyl-26-O-β-D-glucopyranosyl-28-O-β-D-glucopyranosyl-O-β-D-glucopyranosyl(1) and (3S,4R,17R,20S)-17-hydroxy-3-O-β-D-xylopyranose(12)-β-D-glucopyranosyl-26-O-β-D-glucopyranosyl-28-O-β-D-glucopyranosyl-21,24-epoxybaccharane(2), respectively, by spectroscopic methods, in-cluding NMR(1D and 2D), IR and HR-ESI-MS. Compounds 1 and 2 were evaluated for in vitro inhibitory activity against the cell lines. Compound 2 with a new baccharane skeleton had anti-hepatic fibrosis activity against A375 cells in bioassay results, which means the new compounds have potential value in antitumor applications.
      PubDate: 2017-09-12
      DOI: 10.1007/s40242-017-7061-6
       
  • Development of a novel kilowatt microwave plasma torch source for atomic
           emission spectrometry
    • Authors: Dan Zhu; Wei Jin; Bingwen Yu; Yangwei Ying; Haixiang Yu; Jin Shan; Yuwei Yan; Chen Xu; Baolai Wang; Qinhan Jin
      Abstract: Traditional low power-microwave plasma torch(MPT) excitation source of atomic emission spectrometry was shown to be good for the introduction of dry aerosols, but poor for wet sample aerosols. In this work, some significant modifications have been made to traditional MPT. A new MPT excitation source working at kilowatt microwave power has been developed. The kilowatt MPT source can sustain stable plasmas with double or even more filaments, presenting a “bell” form, where the region around the converging point is the optimum region for analysis. The tolerance to aqueous aerosol of the torch is enhanced significantly compared to the traditional one. Therefore, the desolvation system that the low power MPT source has to be relied on can be gotten rid of. A set of favorable detection results have been obtained with direct wet sample aerosol introduction. The kilowatt MPT source is expected to become a practical excitation source for atomic emission spectrometry that will be widely used.
      PubDate: 2017-09-11
      DOI: 10.1007/s40242-017-7072-3
       
  • FeCl 3 6H 2 O-catalyzed synthesis of β -ketothioesters from chain α -oxo
           ketene dithioactals
    • Authors: Hui Zhao; Quanping Diao; Haifeng Yu; Tiechun Li; Peiqiu Liao; Dongyan Hou
      Abstract: A FeCl3 6H2O-catalyzed synthesis of β-ketothioesters from the hydrolysis reaction of chain α-oxoketene dithioacetals was carried out. Subsequently, we explored the FeCl3 6H2O-catalyzed Friedel-Crafts alkylation of the synthesized β-ketothioesters with alcohols in CH3CN at 25 °C, affording the desired α-alkylated β-ketothioesters in excellent yields. Wide scope of the substrates, use of inexpensive reagents, high yields under mild reaction conditions are notable features of these reactions.
      PubDate: 2017-09-11
      DOI: 10.1007/s40242-017-7082-1
       
 
 
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