Mostrando 981 - 1,000 Resultados de 2,278 Para Buscar '"chemist"', tiempo de consulta: 0.16s Limitar resultados
  1. 981
    “…Stimuli-controlled motion at the molecular level has fascinated chemists already for several decades. Taking inspiration from the myriad of dynamic and machine-like functions in nature, a number of strategies have been developed to control motion in purely synthetic systems. …”
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  2. 982
    por Gao, Han, Li, Gang, Lou, Hong-Xiang
    Publicado 2018
    “…Some novel secondary metabolites with marked biological activities might deserve more attention from chemists and biologists in further studies.…”
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  3. 983
    “…Electron transfer reactions are arguably the simplest chemical reactions but they have not yet ceased to intrigue chemists. Charge-separation and charge-recombination reactions are at the core of life-sustaining processes, molecular electronics and solar cells. …”
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  4. 984
  5. 985
    “…Medicinal chemists continue to be fascinated by chalcone derivatives because of their simple chemistry, ease of hydrogen atom manipulation, straightforward synthesis, and a variety of promising biological activities. …”
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  6. 986
    “…The model predicts the major product correctly over 85% of the time requiring around 100 ms per example, a significantly higher accuracy than achieved by previous machine learning approaches, and performs on par with expert chemists with years of formal training. We gain additional insight into predictions via the design of the neural model, revealing an understanding of chemistry qualitatively consistent with manual approaches.…”
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  7. 987
    “…Recent developments in synthetic pathways as simple reversible-deactivation radical polymerization (RDRP) techniques and quantitative post-polymerization reactions, most notoriously ‘click’ reactions, leading to segmented copolymers, have broadened the molecular architectures accessible to polymer chemists as a matter of routine. Segments can be blocks, grafted chains, branchings, telechelic end-groups, covalently attached nanoparticles, nanodomains in networks, even sequences of random copolymers, and so on. …”
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  8. 988
    por Fessner, Nico D.
    Publicado 2019
    “…These enzymes were proven to extend the synthetic toolbox significantly by adding to the flexibility and efficacy of synthetic strategies of natural product chemists, and scientists of other related disciplines.…”
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  9. 989
    “…This interface can inform target prioritization and drug design, and serves as a navigation tool for medicinal chemists, structural and cell biologists exploring ubiquitination pathways. …”
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  10. 990
    por Wang, Zhonglei
    Publicado 2019
    “…Due to their extensive application of organocatalysis in the total synthesis of bioactive molecules and some of them have been used in the industrial synthesis of drugs have attracted increasing interests from chemists. Among the chiral organocatalysts, chiral secondary amines (MacMillan’s catalyst and Jorgensen’s catalyst) have been especially considered attractive strategies because of their impressive efficiency. …”
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  11. 991
    “…[Image: see text] Control of positional selectivity in C–H activation reactions remains a challenge for synthetic chemists. Noncovalent catalysis has the potential to be a powerful strategy to address this challenge. …”
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  12. 992
    “…The novel or designer metabolites produced by fungal endophytes are increasingly recognized by natural chemists due to their diverse structures and as candidates for drug discovery and development. …”
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  13. 993
    por Lucet, C., Olié, J.P.
    Publicado 2020
    “…The ease of access to multiple synthetic products via the Internet combined with the creativity of chemists are contributing to the emergence of novel practices ranging from chemsex to purple drank. …”
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  14. 994
    “…Here, we present the chemical synthesis of C(2) from a hypervalent alkynyl-λ(3)-iodane in a flask at room temperature or below, providing experimental evidence to support theoretical predictions that C(2) has a singlet biradical character with a quadruple bond, thus settling a long-standing controversy between experimental and theoretical chemists, and that C(2) serves as a molecular element in the bottom-up chemical synthesis of nanocarbons such as graphite, carbon nanotubes, and C(60).…”
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  15. 995
    “…Although induced fit has been widely accepted by supramolecular chemists, conformational selection is rarely studied with synthetic systems. …”
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  16. 996
    “…The aim is to assist in situating structural biochemists, synthetic chemists, and molecular biologists who are new to the field of cannabis research.…”
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  17. 997
    “…Catalytic hydrogenation of amides is of great interest for chemists working in organic synthesis, as the resulting amines are widely featured in natural products, drugs, agrochemicals, dyes, etc. …”
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  18. 998
    por Li, Xuefei, Yu, Yanbo, Tu, Zhude
    Publicado 2021
    “…The remarkable prevalence of pyrazole scaffolds in a versatile array of bioactive molecules ranging from apixaban, an anticoagulant used to treat and prevent blood clots and stroke, to bixafen, a pyrazole-carboxamide fungicide used to control diseases of rapeseed and cereal plants, has encouraged both medicinal and organic chemists to explore new methods in developing pyrazole-containing compounds for different applications. …”
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  19. 999
  20. 1000
    por Pan, Sudip, Frenking, Gernot
    Publicado 2021
    “…Using the concept of resonance that he introduced, he was able to present a consistent description of chemical bonding for molecules, metals, and ionic crystals which was used by many chemists and subsequently found its way into chemistry textbooks. …”
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