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  Subjects -> CHEMISTRY (Total: 831 journals)
    - ANALYTICAL CHEMISTRY (47 journals)
    - CHEMISTRY (584 journals)
    - CRYSTALLOGRAPHY (22 journals)
    - ELECTROCHEMISTRY (26 journals)
    - INORGANIC CHEMISTRY (41 journals)
    - ORGANIC CHEMISTRY (45 journals)
    - PHYSICAL CHEMISTRY (66 journals)

CHEMISTRY (584 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: 31)
ACS Catalysis     Full-text available via subscription   (Followers: 27)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 16)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 17)
ACS Macro Letters     Full-text available via subscription   (Followers: 20)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 24)
ACS Nano     Full-text available via subscription   (Followers: 196)
ACS Photonics     Full-text available via subscription   (Followers: 5)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 12)
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: 6)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 5)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 11)
Advanced Functional Materials     Hybrid Journal   (Followers: 41)
Advanced Science Focus     Free   (Followers: 1)
Advances in Chemical Engineering and Science     Open Access   (Followers: 24)
Advances in Chemical Science     Open Access   (Followers: 9)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 14)
Advances in Drug Research     Full-text available via subscription   (Followers: 17)
Advances in Enzyme Research     Open Access  
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: 14)
Advances in Nanoparticles     Open Access   (Followers: 11)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 9)
Advances in Polymer Science     Hybrid Journal   (Followers: 37)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 10)
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: 30)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 85)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 11)
American Journal of Chemistry     Open Access   (Followers: 20)
American Journal of Plant Physiology     Open Access   (Followers: 10)
American Mineralogist     Full-text available via subscription   (Followers: 8)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 20)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 136)
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: 2)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 6)
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: 12)
Anti-Infective Agents     Hybrid Journal   (Followers: 1)
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: 4)
Autophagy     Full-text available via subscription   (Followers: 2)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 6)
Biochemistry     Full-text available via subscription   (Followers: 156)
Biochemistry Insights     Open Access   (Followers: 4)
Biochemistry Research International     Open Access   (Followers: 4)
BioChip Journal     Hybrid Journal   (Followers: 1)
Bioinorganic Chemistry and Applications     Open Access   (Followers: 5)
Bioinspired Materials     Open Access  
Biointerface Research in Applied Chemistry     Open Access   (Followers: 1)
Biointerphases     Open Access  
Biomacromolecules     Full-text available via subscription   (Followers: 18)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 6)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 2)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 30)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 23)
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: 2)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 13)
C - Journal of Carbon Research     Open Access  
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 3)
Canadian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
Canadian Mineralogist     Full-text available via subscription   (Followers: 2)
Carbohydrate Research     Hybrid Journal   (Followers: 11)
Carbon     Hybrid Journal   (Followers: 74)
Catalysis for Sustainable Energy     Open Access   (Followers: 3)

        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  [1598 journals]
  • Contents: C&B 8/2015
    • PubDate: 2015-08-12T04:33:39.740831-05:
      DOI: 10.1002/cbdv.201590009
       
  • Phytochemical Constituents and Biological Activities of Plants from the
           Genus Dryopteris
    • First page: 1131
      PubDate: 2015-08-12T04:33:39.295648-05:
      DOI: 10.1002/cbdv.201400157
       
  • On the Quest of Dioxygen by Monomeric Sarcosine Oxidase. A Molecular
           Dynamics Investigation
    • Authors: Francesco Pietra
      First page: 1163
      Abstract: It is reported here on random acceleration molecular dynamics (RAMD) simulations with the 2GF3 bacterial monomeric sarcosine oxidase (MSOX), O2, and furoic acid in place of sarcosine, solvated by TIP3 H2O in a periodic box. An external tiny force, acting randomly on O2, accelerated its relocation, from the center of activation between residue K265 and the si face of the flavin ring of the flavin adenine dinucleotide cofactor, to the surrounding solvent. Only three of the four O2 gates previously described for this system along a composite method technique were identified, while two more major O2 gates were found. The RAMD simulations also revealed that the same gate can be reached by O2 along different pathways, often involving traps for O2. Both the residence time of O2 in the traps, and the total trajectory time for O2 getting to the solvent, could be evaluated. The new quick pathways discovered here suggest that O2 exploits all nearby interstices created by the thermal fluctuations of the protein, not having necessarily to look for the permanent large channel used for uptake of the FADH cofactor. To this regard, MSOX resembles closely KijD3 N‐oxygenase. These observations solicit experimental substantiation, in a long term aim at discovering whether gates and pathways for the small gaseous ligands inside the proteins are under Darwinian functional evolution or merely stochastic control operates.
      PubDate: 2015-08-12T04:33:41.567898-05:
      DOI: 10.1002/cbdv.201400362
       
  • Phytochemical Analysis, Biological Activity, and Secretory Structures of
           Stachys annua (L.) L. subsp. annua (Lamiaceae) from Central Italy
    • First page: 1172
      Abstract: Stachys annua subsp. annua, well‐known in central Italy as ‘stregona annuale’, is an annual, small, slightly‐scented herb, commonly found in fields and uncultivated areas in almost all regions of Italy. In folk medicine, its aerial parts were used as anti‐catarrhal, febrifuge, tonic, and vulnerary. In the present work, the chemical composition of the flowering aerial parts was studied. The hydrodistilled volatile oil, analysed by GC/MS, showed sesquiterpenoids as the major fraction (42.5%); phytol (9.8%), germacrene D (9.2%), and spathulenol (8.5%) were the most abundant constituents. The volatile oil was assayed for antioxidant and cytotoxic activity by DPPH, ABTS, FRAP, and MTT methods. The cytotoxicity results against HCT116, A375, and MDA‐MB 231 human tumor cell lines were significant, with IC50 values of 23.5, 37.2, and 41.5 μg/ml, respectively, whereas the antioxidant power was negligible. The EtOH extract was composed mainly of three glycosidic flavonoids, namely 7‐{[2‐O‐(6‐O‐acetyl‐β‐D‐allopyranosyl)‐β‐D‐glucopyranosyl]oxy}‐5,8‐dihydroxy‐2‐(4‐methoxyphenyl)‐4H‐1‐benzopyran‐4‐one (1), 7‐{[6‐O‐acetyl‐2‐O‐(6‐O‐acetyl‐β‐D‐allopyranosyl)‐β‐D‐glucopyranosyl]oxy}‐2‐(3,4‐dihydroxyphenyl)‐5,8‐dihydroxy‐4H‐1‐benzopyran‐4‐one (2), and 7‐{[6‐O‐acetyl‐2‐O‐(β‐D‐allopyranosyl)‐β‐D‐glucopyranosyl]oxy}‐2‐(3‐hydroxy‐4‐methoxyphenyl)‐5,8‐dihydroxy‐4H‐1‐benzopyran‐4‐one (3). On the contrary, iridoids, considered chemotaxonomic markers of the genus Stachys, were absent in this species. Finally, the morphological and histochemical survey showed that glandular trichomes were composed of two main types, i.e. peltate type A and capitate types B and C giving positive response for both lipids and polyphenols.
      PubDate: 2015-08-12T04:33:38.201548-05:
      DOI: 10.1002/cbdv.201400275
       
  • HPTLC and GC/MS Study of Amaryllidaceae Alkaloids of Two Narcissus Species
    • First page: 1184
      Abstract: In this article, we report on the alkaloid profile and dynamic of alkaloid content and diversity in two Narcissus plants at different stages of development. The alkaloid profile of the two Narcissus species was investigated by GC/MS and HPTLC. Fifty eight Amaryllidaceae alkaloids were detected, and 25 of them were identified in the different organs of N. tazetta and N. papyraceus. The alkaloid 3‐O‐methyl‐9‐O‐demethylmaritidine is tentatively identified here for the first time from the Amaryllidaceae family, and four alkaloids (tazettamide, sternbergine, 1‐O‐acetyllycorine, 2,11‐didehydro‐2‐dehydroxylycorine) are tentatively identified for the first time in the genus Narcissus. The different organs of the two species analyzed showed remarkable differences in their alkaloid pattern, type of biosynthesis, main alkaloid and number of alkaloids. Lycorine‐type alkaloids dominated the alkaloid, metabolism in N. papyraceus, while alkaloids of narciclasine‐, galanthamine‐ and homolycorine‐types were found only in the species N. tazetta L.
      PubDate: 2015-08-12T04:33:40.802178-05:
      DOI: 10.1002/cbdv.201400309
       
  • Coleifolides A and B, Two New Sesterterpenoids from the Aerial Parts of
           Scutellaria coleifolia H.Lév.
    • First page: 1200
      Abstract: Coleifolides A and B (1 and 2), two new sesterterpenoids with a β‐methyl‐α,β‐unsaturated‐γ‐lactone moiety, were isolated from the aerial parts of Scutellaria coleifolia H.Lév. (Lamiaceae), together with three known compounds. Their structures were elucidated by NMR and MS examinations. Coleifolides A and B were concluded to be partially racemic compounds by the HPLC analysis using a chiral column or introduction of chiral derivatizing agents. The absolute configuration of the major isomer was determined by analyses of the CD spectrum as well as NMR data of (R)‐ and (S)‐2‐NMA derivatives. Coleifolides A and B are structurally similar to manoalide derivatives, previously isolated from marine sponges, and appear to be the first examples of this type of compounds being isolated from higher plants.
      PubDate: 2015-08-12T04:33:38.636359-05:
      DOI: 10.1002/cbdv.201400248
       
  • Volatiles as Chemosystematic Markers for Distinguishing Closely Related
           Species within the Pinus mugo Complex
    • First page: 1208
      Abstract: Headspace solid‐phase microextraction (HS‐SPME) coupled to GC/MS analysis was used to identify the constituents of pine‐needle volatiles differentiating three closely‐related pine species within the Pinus mugo complex, i.e., P. uncinata Ramond ex DC., P. uliginosa G.E.Neumann ex Wimm., and P. mugo Turra. Moreover, chemosystematic markers were proposed for the three analyzed pine species. The major constituents of the pine‐needle volatiles were α‐pinene (28.4%) and bornyl acetate (10.8%) for P. uncinata, δ‐car‐3‐ene (21.5%) and α‐pinene (16.1%) for P. uliginosa, and α‐pinene (20%) and δ‐car‐3‐ene (18.1%) for P. mugo. This study is the first report on the application of the composition of pine‐needle volatiles for the reliable identification of closely‐related pine species within the Pinus mugo complex.
      PubDate: 2015-08-12T04:33:38.91374-05:0
      DOI: 10.1002/cbdv.201400253
       
  • Diterpene Constituents of Euphorbia exigua L. and Multidrug Resistance
           Reversing Activity of the Isolated Diterpenes
    • First page: 1214
      Abstract: Phytochemical investigation of the MeOH extract obtained from the aerial parts of the annual weed Euphorbia exigua L. resulted in the isolation of two novel (1, 2) and one known (3) jatrophane diterpenes. Their structures were established by extensive 1D‐ and 2D‐NMR spectroscopy and HR‐ESI‐MS. The isolated compounds were evaluated for multidrug resistance (MDR) reversing activity on human MDR gene‐transfected L5178 mouse lymphoma cells; and all three compounds were found to modulate the intracellular drug accumulation.
      PubDate: 2015-08-12T04:33:39.803369-05:
      DOI: 10.1002/cbdv.201400260
       
  • Lupane‐ and Friedelane‐Type Triterpenoids from Celastrus
           stylosus
    • First page: 1222
      Abstract: Two new triterpenoids, 30‐hydroxylup‐20(29)‐ene 3β‐caffeate (1) and 24‐nor‐friedelan‐6α,10‐dihydroxy‐1,2‐dioxo‐4,7‐dien‐29‐oic acid (2), together with eight known compounds 3–10, were isolated from the roots of Celastrus stylosus. The structures of these compounds were elucidated on the basis of spectroscopic analyses. To the best of our knowledge, this represents the first study on the chemical constituents of C. stylosus. The antiproliferative activities of the triterpenoids against six human cancer cell lines (PANC‐1, A549, PC‐3, HepG2, SGC‐7901, and HCCLM3) were evaluated. Compounds 3, 4, and 10 exhibited comparable activities against PC‐3 and HCCLM3 cell lines as the positive control taxol.
      PubDate: 2015-08-12T04:33:39.110459-05:
      DOI: 10.1002/cbdv.201400269
       
  • New Labdane Diterpenes and Their Glycoside Derivatives from the Roots of
           Isodon adenantha
    • First page: 1229
      Abstract: Two new labdane‐type diterpenes (adenanthic acids A and B; 1 and 2, resp.) and three new labdane diterpene glycosides (adenanthosides A–C; 3–5, resp.) were isolated from the roots of Isodon adenantha, together with 23 known constituents including seven diterpenoids (6–12), eight triterpenoids (13–20), one lignan glycoside (21), six steroids (22–27), and one ceramide (28). Their structures were elucidated by spectroscopic methods including extensive 2D‐NMR techniques. Cytotoxicity and antibacterial activities of the samples were measured by the MTT method and the filter paper disc agar diffusion method. But none of them showed significant activities.
      PubDate: 2015-08-12T04:33:40.58148-05:0
      DOI: 10.1002/cbdv.201400287
       
  • (Chemotaxonomic) Implications of Postharvest/Storage‐Induced Changes
           in Plant Volatile Profiles – the Case of Artemisia absinthium L.
           Essential Oil
    • First page: 1237
      Abstract: The plant volatile profile and the essential‐oil chemical composition change during the storage of plant material. The objective of this study was to develop a mathematical model able to predict, explain, and quantify these changes. Mathematical equations, derived under the assumption that the essential oil contained within plant material could be treated as an ideal solution (Raoult's law), were applied for tracking of postharvest changes in the volatile profile of Artemisia absinthium L. (the essential oils were analyzed by GC‐FID and GC/MS). Starting from a specific chemical composition of an essential‐oil sample obtained from plant material after a short drying period (typically 5–10 d), and by using the equations derived from this model, one could easily predict evaporation‐induced changes in the volatile profile of the plant material. Based on the composition of the essential‐oil sample obtained after a given storage time t, it is possible to identify those components that were involved in chemical reactions, both as reactants and possible products. The established model even allowed the recognition of pairs of transformation, i.e., ‘daughter’ products and their ‘parent’ compounds. The obtained results highlight that the essential‐oil composition is highly dependent on the storage period of any plant material and urges caution in different types of phytochemical studies, especially chemotaxonomic ones, or practical application.
      PubDate: 2015-08-12T04:33:41.788659-05:
      DOI: 10.1002/cbdv.201400288
       
  • Three New Isomeric Indole Alkaloids from Nauclea officinalis
    • First page: 1256
      Abstract: Three new isomeric monoterpene indole alkaloids, naucleofficines I–III (1–3, resp.) were isolated from the stems (with bark) of Nauclea officinalis. Their structures were elucidated on the basis of spectroscopic methods and single‐crystal diffraction analyses. The cytotoxic activities of 1–3 against human colon cancer, human gastric cancer, and human hepatoma cells were also investigated.
      PubDate: 2015-08-12T04:33:42.363917-05:
      DOI: 10.1002/cbdv.201400289
       
  • Biphenyl‐Type Neolignan Derivatives from the Twigs of Magnolia
           denudata and Their Anti‐Inflammatory Activity
    • First page: 1263
      Abstract: Two new biphenyl‐type neolignan derivatives, 2‐[2‐(hydroxymethyl)‐1‐benzofuran‐5‐yl]‐4‐(prop‐2‐en‐1‐yl)phenol (1) and 2′‐ethoxy‐5,5′‐di(prop‐2‐en‐1‐yl)biphenyl‐2‐ol (2), were isolated from the twigs of Magnolia denudata, together with six known compounds (3–8). The structures of 1 and 2 were determined through extensive 1D‐ and 2D‐NMR and mass‐spectrometric analyses. Magnolol (6) and honokiol (7) exhibited potent inhibition (IC50 values=4.4±0.2 and 0.71±0.13 μg/ml, resp.) of O$\rm{{_{2}^{{^\cdot} -}}}$ generation by human nutrophils in response to N‐formyl‐L‐methionyl‐L‐leucyl‐L‐phenylalanine/cytochalasin B (fMLP/CB). In addition, 2‐[2‐(hydroxymethyl)‐1‐benzofuran‐5‐yl]‐4‐(prop‐2‐en‐1‐yl)phenol (1), 2′‐ethoxy‐5,5′‐di(prop‐2‐en‐1‐yl)biphenyl‐2‐ol (2), magnolol (6), and vanillic acid (8) inhibited fMLP/CB‐induced elastase release with IC50 values=6.4±1.5, 2.4±0.4, 1.5±0.2, and 4.8±0.5 μg/ml, respectively.
      PubDate: 2015-08-12T04:33:41.164672-05:
      DOI: 10.1002/cbdv.201400297
       
  • Fatty‐Acid Composition of Seeds and Chemotaxonomic Evaluation of
           Sixteen Sapindaceae Species
    • First page: 1271
      Abstract: Circumscriptions for the Sapindaceae family and its infrafamilial relationships have been widely discussed. Certain groups are highly morphologically similar; thus, it is difficult to identify certain taxa. DNA Analyses have also indicated complex phylogenetic relationships, and it is difficult to relate such analyses to morphological data. Given the above concerns, this study aimed to investigate the fatty‐acid profiles of the seed oils of 16 Sapindaceae species belonging to five tribes and to evaluate their potential chemotaxonomic significance. In total, eleven fatty acids were identified, and eicosenoic acid predominated in nine species. Multivariate analyses (principal component and cluster analyses) of the fatty‐acid profiles of the seed oils allowed to separate them in two major clusters. The first cluster, characterized by oils with high eicosenoic acid levels, included all species belonging to the Paullinieae tribe (Cardiospermum, Paullinia, and Serjania species). In the second main cluster, the chemical similarity of the oils was lower, and the species belonged to different tribes. Nevertheless, the tree investigated Allophylus species (Thouinieae tribe) constituted a separate subcluster. Thus, the results showed that the fatty‐acid composition of the seed oils of Sapindaceae species provide chemotaxonomic support for the separation of the Paullinieae tribe from the other tribes studied.
      PubDate: 2015-08-12T04:33:40.240524-05:
      DOI: 10.1002/cbdv.201400325
       
  • Five New Guaiane Sesquiterpenes from the Endophytic Fungus Xylaria sp. YM
           311647 of Azadirachta indica
    • First page: 1281
      Abstract: Five new guaiane sesquiterpenes, 1–5, were isolated from the culture broth of the endophytic fungus Xylaria sp. YM 311647, isolated from Azadirachta indica A. Juss. The structures of these compounds were elucidated on the basis of spectroscopic analyses, and their inhibitory activities against five pathogenic fungi were evaluated. All guaiane sesquiterpenes showed moderate or weak antifungal activities in a broth microdilution assay.
      PubDate: 2015-08-12T04:33:40.062121-05:
      DOI: 10.1002/cbdv.201400405
       
  • Editorial Comment: Jiangxienone, a New Compound with Potent Cytotoxicity
           against Tumor Cells from Traditional Chinese Medicinal Mushroom Cordyceps
           jiangxiensis
    • First page: 1287
      PubDate: 2015-08-12T04:33:40.516718-05:
      DOI: 10.1002/cbdv.201500200
       
 
 
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