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CHEMISTRY (590 journals)                  1 2 3 4 5 6 | Last

2D Materials     Hybrid Journal   (Followers: 5)
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: 28)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 16)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 18)
ACS Macro Letters     Full-text available via subscription   (Followers: 20)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 25)
ACS Nano     Full-text available via subscription   (Followers: 245)
ACS Photonics     Full-text available via subscription   (Followers: 5)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 16)
Acta Chemica Iasi     Open Access  
Acta Chimica Sinica     Full-text available via subscription  
Acta Chimica Slovaca     Open Access   (Followers: 5)
Acta Chromatographica     Full-text available via subscription   (Followers: 9)
Acta Facultatis Medicae Naissensis     Open Access   (Followers: 1)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 5)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 10)
Advanced Functional Materials     Hybrid Journal   (Followers: 43)
Advanced Science Focus     Free   (Followers: 2)
Advances in Chemical Engineering and Science     Open Access   (Followers: 26)
Advances in Chemical Science     Open Access   (Followers: 10)
Advances in Chemistry     Open Access  
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 14)
Advances in Drug Research     Full-text available via subscription   (Followers: 19)
Advances in Environmental Chemistry     Open Access  
Advances in Enzyme Research     Open Access   (Followers: 1)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 7)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 13)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 15)
Advances in Nanoparticles     Open Access   (Followers: 12)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 10)
Advances in Polymer Science     Hybrid Journal   (Followers: 37)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 7)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 11)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 6)
African Journal of Chemical Education     Open Access   (Followers: 1)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 5)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 1)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 1)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 4)
AMB Express     Open Access  
Ambix     Hybrid Journal   (Followers: 2)
American Journal of Applied Sciences     Open Access   (Followers: 32)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 118)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 11)
American Journal of Chemistry     Open Access   (Followers: 23)
American Journal of Plant Physiology     Open Access   (Followers: 11)
American Mineralogist     Full-text available via subscription   (Followers: 7)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 21)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 181)
Annales UMCS, Chemia     Open Access   (Followers: 2)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 1)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 1)
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: 10)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Anti-Infective Agents     Hybrid Journal   (Followers: 2)
Antiviral Chemistry and Chemotherapy     Full-text available via subscription  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 4)
Applied Spectroscopy     Full-text available via subscription   (Followers: 16)
Applied Surface Science     Hybrid Journal   (Followers: 22)
Arabian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 5)
Autophagy     Hybrid Journal   (Followers: 3)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 6)
Biochemistry     Full-text available via subscription   (Followers: 196)
Biochemistry Insights     Open Access   (Followers: 4)
Biochemistry Research International     Open Access   (Followers: 5)
BioChip Journal     Hybrid Journal   (Followers: 1)
Bioinorganic Chemistry and Applications     Open Access   (Followers: 5)
Bioinspired Materials     Open Access   (Followers: 1)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access  
Biomacromolecules     Full-text available via subscription   (Followers: 19)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 7)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 2)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 31)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 25)
Bioorganic Chemistry     Hybrid Journal   (Followers: 5)
Biopolymers     Hybrid Journal   (Followers: 16)
Biosensors     Open Access   (Followers: 3)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 3)
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 3)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 14)
C - Journal of Carbon Research     Open Access  
Cakra Kimia (Indonesian E-Journal of Applied Chemistry)     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 4)
Canadian Journal of Chemistry     Full-text available via subscription   (Followers: 5)

        1 2 3 4 5 6 | Last

Journal Cover   Chemistry & Biodiversity
  [SJR: 0.723]   [H-I: 40]   [5 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1612-1872 - ISSN (Online) 1612-1880
   Published by John Wiley and Sons Homepage  [1597 journals]
  • Contents: C&B 11/2015
    • PubDate: 2015-11-16T05:59:01.682452-05:
      DOI: 10.1002/cbdv.201580913
  • Chemistry and Biology of the Genus Flourensia (Asteraceae)
    • Pages: 1595 - 1634
      Abstract: Flourensia species are dominant plants that are adapted to semidesertic and desertic regions. It is believed that they are successful plants because they employ several protection mechanisms, including the formation of a waxy film on their aerial parts to protect them from dehydration. This waxy film contains chemical compounds that are capable of inhibiting the growth of other plants and of acting as allelopathic and herbicidal agents and as germination inhibitors. These plants also limit herbivory, and they exhibit insecticidal, insect antifeedant, antibacterial, antifungal, antialgal, and antitermite activities. Sesquiterpenes, flavonoids, benzofurans, chromenes, coumarins, lupan triterpenes, aliphatic lactones, and aromatic and acetilenic compounds have all been isolated from the organic extracts of Flourensia species. Monoterpenes, sesquiterpenes, and aliphatic hydrocarbons are the main constituents found in their essential oils. This review is an overview of the chemical constituents and of the biological activities of Flourensia species.
      PubDate: 2015-11-16T05:59:01.742566-05:
      DOI: 10.1002/cbdv.201400220
  • A Comparative Analysis of the ‘Green’ Techniques Applied for
           Polyphenols Extraction from Bioresources
    • Authors: Adina Iulia Talmaciu; Irina Volf, Valentin I. Popa
      Pages: 1635 - 1651
      Abstract: From all the valuable biomass extractives, polyphenols are a widespread group of secondary metabolites found in all plants, representing the most desirable phytochemicals due to their potential to be used as additives in food industry, cosmetics, medicine, and others fields. At present, there is an increased interest to recover them from plant of spontaneous flora, cultivated plant, and wastes resulted in agricultural and food industry. That is why many efforts have been made to provide a highly sensitive, efficiently, and eco‐friendly methods, for the extraction of polyphenols, according to the green chemistry and sustainable development concepts. Many extraction procedures are known with advantages and disadvantages. From these reasons, the aim of this article is to provide a comparative analysis regarding technical and economical aspects related to the most innovative extraction techniques studied in the last time: microwave‐assisted extraction (MAE), supercritical fluid extraction (SFE), and ultrasound‐assisted extraction (UAE).
      PubDate: 2015-11-16T05:59:01.037727-05:
      DOI: 10.1002/cbdv.201400415
  • The Gastrointestinal Tract Metabolism and Pharmacological Activities of
           Grosvenorine, a Major and Characteristic Flavonoid in the Fruits of
           Siraitia grosvenorii
    • Authors: Mengyue Wang; Shihua Xing, Thithanhthuy Luu, Min Fan, Xiaobo Li
      Pages: 1652 - 1664
      Abstract: Grosvenorine is the major flavonoid compound of the fruits of Siraitia grosvenorii (Swingle) C. Jeffrey, a medical plant endemic to China. In the present study, for the first time, the grosvenorine metabolism in an in vitro simulated human gastrointestinal tract (including artificial gastric juice, artificial intestinal juice and intestinal flora), as well as its pharmacological activities (including anti‐complement, antibacterial and antioxidant activities), was investigated. The results showed that grosvenorine was metabolized by human intestinal flora; its four metabolites were isolated by semi‐preparative HPLC and identified by NMR as kaempferitrin, afzelin, α‐rhamnoisorobin, and kaempferol. Further pharmacological evaluation showed that grosvenorine exhibited good antibacterial and antioxidant activities, with its metabolites possessing more potent activities. Although grosvenorine did not present obvious anticomplement activity, its metabolites showed interesting activities. This study revealed that intestinal bacteria play an important role in the gastrointestinal metabolism of grosvenorine and significantly affect its pharmacological activities.
      PubDate: 2015-11-16T05:59:01.169495-05:
      DOI: 10.1002/cbdv.201400397
  • 4α‐Acetoxyamijidictyol – A New Antifeeding Dolastane
           Diterpene from the Brazilian Brown Alga Canistrocarpus cervicornis
    • Pages: 1665 - 1677
      Abstract: Chemical investigation of the CH2Cl2 crude extract from the brown alga Canistrocarpus cervicornis (Dictyotaceae) led to isolation of one new (1) and four previously reported dolastane diterpenes (2–5). Their structures were characterized by 1D‐ and 2D‐NMR spectroscopic techniques, including a full single crystal X‐ray diffraction analysis for 1, 2, and 4. In addition, the new structure 1 was assayed as chemical defense inhibiting the feeding by the sea urchin Lytechinus variegatus. This study constitutes an additional report broadening the known spectrum of action and defensive roles of secondary metabolites of the C. cervicornis and Dictyotales species.
      PubDate: 2015-11-16T05:59:01.560581-05:
      DOI: 10.1002/cbdv.201400410
  • Antioxidants, Enzyme Inhibitors, and Biogenic Compounds in Grain Extracts
           of Barleys
    • Pages: 1678 - 1695
      Abstract: The content of biogenic compounds and the biological activities of barley (Hordeum vulgare L.)‐grain extracts was evaluated. The sufficiently large and heterogeneous set of barley genotypes (100 accessions) enabled the selection of special genotypes interesting for potential industrial, pharmaceutical, and medicinal applications. Barley genotypes with the highest contents of phenols, phenolic acids, flavonoids, biogenic thiols, and amines, radical‐scavenging activity, as well as inhibitory activities of trypsin, thrombin, collagenase, urokinase, and cyclooxygenase were identified.
      PubDate: 2015-11-16T05:59:00.545648-05:
      DOI: 10.1002/cbdv.201400419
  • Application of NMR Spectroscopy in the Assessment of Radiation Dose in
           Human Primary Cells
    • Pages: 1696 - 1705
      Abstract: We employed the primary cell model system as a first step toward establishing a method to assess the influence of ionizing radiation by using a combination of common and abundant metabolites. We applied X‐ray irradiation amounts of 0, 1, and 5 Gy to the cells that were harvested 24, 48, or 72 h later, and profiled metabolites by 2D‐NMR spectroscopy to sort out candidate molecules that could be used to distinguish the samples under different irradiation conditions. We traced metabolites stemming from the input 13C‐glucose, identified twelve of them from the cell extracts, and applied statistical analysis to find out that all the metabolites, including glycine, alanine, and gluatamic acid, increased upon irradiation. The combinatorial use of the selected metabolites showed promising results where the product of signal intensities of alanine and lactate could differentiate samples according to the dose of X‐ray irradiation. We hope that this work can form a base for treating radiation‐poisoned patients in the future.
      PubDate: 2015-11-16T05:59:01.877006-05:
      DOI: 10.1002/cbdv.201400431
  • Chemical Composition of Juniperus communis L. Cone Essential Oil and Its
           Variability among Wild Populations in Kosovo
    • Authors: Avni Hajdari; Behxhet Mustafa, Dashnor Nebija, Elheme Miftari, Cassandra L. Quave, Johannes Novak
      Pages: 1706 - 1717
      Abstract: Ripe cones of Juniperus communis L. (Cupressaceae) were collected from five wild populations in Kosovo, with the aim of investigating the chemical composition and natural variation of essential oils between and within wild populations. Ripe cones were collected, air dried, crushed, and the essential oils obtained by hydrodistillation. The essential‐oil constituents were identified by GC‐FID and GC/MS analyses. The yield of essential oil differed depending on the population origins and ranged from 0.4 to 3.8% (v/w, based on the dry weight). In total, 42 compounds were identified in the essential oils of all populations. The principal components of the cone‐essential oils were α‐pinene, followed by β‐myrcene, sabinene, and D‐limonene. Taking into consideration the yield and chemical composition, the essential oil originating from various collection sites in Kosovo fulfilled the minimum requirements for J. communis essential oils of the European Pharmacopoeia. Hierarchical cluster analysis (HCA) and principal component analysis (PCA) were used to determine the influence of the geographical variations on the essential‐oil composition. These statistical analyses suggested that the clustering of populations was not related to their geographic location, but rather appeared to be linked to local selective forces acting on the chemotype diversity.
      PubDate: 2015-11-16T05:59:00.756459-05:
      DOI: 10.1002/cbdv.201400439
  • α‐Glucosidase Inhibitors from the Fungus Aspergillus terreus
    • Pages: 1718 - 1724
      Abstract: One new diketopiperazine alkaloid amauromine B (1), along with three known meroterpenoids, austalide B (2), austalides N and O (3 and 4), and two known steroids (5 and 6), was isolated and identified from the culture broth of the fungus Aspergillus terreus 3.05358. Their structures were elucidated by extensive spectroscopic techniques, including 2D‐NMR and MS analysis, the absolute configuration of 1 was unambiguously established by single crystal X‐ray diffraction analysis. All the isolates were evaluated for their inhibitory effects on α‐glucosidase. Amauromine B (1) and austalide N (3) exhibited more potent α‐glucosidase inhibitory activities than the positive control acarbose.
      PubDate: 2015-11-16T05:59:01.36871-05:0
      DOI: 10.1002/cbdv.201500027
  • Netamines O–S, Five New Tricyclic Guanidine Alkaloids from the
           Madagascar Sponge Biemna laboutei, and Their Antimalarial Activities
    • Pages: 1725 - 1733
      Abstract: In our continuing program to isolate new compounds from the Madagascar sponge Biemna laboutei, five new tricyclic guanidine alkaloids, netamines O – S (1–5, resp.), have been identified together with the known compounds netamine E (6) and mirabilin J (7). The structures of all new netamines were assigned on the basis of spectroscopic analyses. Their relative configurations were established by analysis of ROESY data and comparison with literature data. Netamines O, P, and Q, which were isolated in sufficient quantities, were tested for their cytotoxic activities against KB cells and their activities against the malaria parasite Plasmodium falciparum. Netamines O and Q were found to be moderately cytotoxic. Netamines O, P, and Q exhibited antiplasmodial activities with IC50 values of 16.99±4.12, 32.62±3.44, and 8.37±1.35 μM, respectively.
      PubDate: 2015-11-16T05:59:01.285859-05:
      DOI: 10.1002/cbdv.201400350
  • Chemical Composition and Character Impact Odorants in Volatile Oils from
           Edible Mushrooms
    • Authors: Atsushi Usami; Ryota Motooka, Hiroshi Nakahashi, Shinsuke Marumoto, Mitsuo Miyazawa
      Pages: 1734 - 1745
      Abstract: The aim of this study was to investigate the chemical composition and the odor‐active components of volatile oils from three edible mushrooms, Pleurotus ostreatus, Pleurotus eryngii, and Pleurotus abalonus, which are well‐known edible mushrooms. The volatile components in these oils were extracted by hydrodistillation and identified by GC/MS, GC‐olfactometry (GC‐O), and aroma extract dilution analysis (AEDA). The oils contained 40, 20, and 53 components, representing 83.4, 86.0, and 90.8% of the total oils in P. ostreatus, P. eryngii, and P. abalonus, respectively. Odor evaluation of the volatile oils from the three edible mushrooms was also carried out using GC‐O, AEDA, and odor activity values, by which 13, eight, and ten aroma‐active components were identified in P. ostreatus, P. eryngii, and P. abalonus, respectively. The most aroma‐active compounds were C8‐aliphatic compounds (oct‐1‐en‐3‐ol, octan‐3‐one, and octanal) and/or C9‐aliphatic aldehydes (nonanal and (2E)‐non‐2‐enal).
      PubDate: 2015-11-16T05:59:00.869597-05:
      DOI: 10.1002/cbdv.201400395
  • Indole Alkaloids from the Sea Anemone Heteractis aurora and Homarine from
           Octopus cyanea
    • Pages: 1746 - 1755
      Abstract: The two new indole alkaloids 2‐amino‐1,5‐dihydro‐5‐(1H‐indol‐3‐ylmethyl)‐4H‐imidazol‐4‐one (1), 2‐amino‐5‐[(6‐bromo‐1H‐indol‐3‐yl)methyl]‐3,5‐dihydro‐3‐methyl‐4H‐imidazol‐4‐one (2), and auramine (3) have been isolated from the sea anemone Heteractis aurora. Both indole alkaloids were synthesized for the confirmation of the structures. Homarine (4), along with uracil (5), hypoxanthine (6), and inosine (7) have been obtained from Octopus cyanea.
      PubDate: 2015-11-16T05:59:01.462954-05:
      DOI: 10.1002/cbdv.201400406
  • Gastroprotective and Antioxidant Effects of Lobaria pulmonaria and Its
           Metabolite Rhizonyl Alcohol on Indomethacin‐Induced Gastric Ulcer
    • Pages: 1756 - 1767
      Abstract: Two lichen metabolites, rhizonaldehyde (1) and rhizonyl alcohol (2), were isolated from the acetone extract of Lobaria pulmonaria by chromatographic methods, and their chemical structures were determined by UV/VIS, IR, and 1D‐ and 2D‐NMR spectroscopic methods. The gastroprotective and in vivo antioxidant activities of extracts of L. pulmonaria and its metabolites, 1 and 2, were investigated in indomethacin‐induced ulcer models in rats. The gastric lesions were significantly reduced by acetone, hexane, and CHCl3 extracts, with 75.3–41.5% inhibition. Rhizonyl alcohol (2) significantly reduced the gastric lesions with an inhibition rate of 84.6–42.8%, whereas rhizonaldehyde (1) significantly increased the gastric lesions. Antioxidant parameters and myeloperoxidase activities were also evaluated in the gastric tissues of the rats. Indomethacin caused oxidative stress, which resulted in lipid peroxidation in gastric tissues by decreasing the levels of the antioxidants as compared to healthy rat tissues. In contrast to indomethacin, all extracts and rhizonyl alcohol (2) caused a significant decrease in lipid peroxidation levels and an increase in antioxidant parameters, superoxide dismutase, glutathione peroxidase, and glutathione‐S‐transferase, and reduced glutathione in gastric tissues. The administration of rhizonyl alcohol (2) also resulted in a decrease in gastric myeloperoxidase activity increased by indomethacin. The gastroprotective effect of rhizonyl alcohol (2) can be attributed to its antioxidant properties and its suppressing effect on neutrophil infiltration into gastric tissues.
      PubDate: 2015-11-16T05:59:00.395429-05:
      DOI: 10.1002/cbdv.201400432
  • Four New Flavonoids with α‐Glucosidase Inhibitory Activities
           from Morus alba var. tatarica
    • Pages: 1768 - 1776
      Abstract: Four new flavonoids, mortatarins A–D (1–4, resp.), along with eight known flavonoids (5–12) were isolated from the root bark of Morus alba var. tatarica. Their structures were established on the basis of spectroscopic data analysis, and the absolute configuration of 4 was determined by analysis of its CD spectrum. All isolates were tested for inhibitory activities against α‐glucosidase. Compounds 4, 7, and 8 exhibited a significant degree of inhibition with IC50 values of 5.0±0.3, 7.5±0.5, and 5.9±0.2 μM, respectively.
      PubDate: 2015-11-16T05:59:00.139973-05:
      DOI: 10.1002/cbdv.201500005
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