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相关概念视频

Filtration00:53

Filtration

836
Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
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Molecules and Compounds02:38

Molecules and Compounds

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Atoms and Molecules
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Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

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In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
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Ions, Molecules, and Compounds01:23

Ions, Molecules, and Compounds

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Ions - When an atom participates in a chemical reaction that results in the donation or acceptance of one or more electrons, the atom becomes positively or negatively charged. This frequently happens for most atoms to have a full valence shell. This can happen either by gaining electrons to fill a shell that is more than half-full or by giving away electrons to empty a shell that is less than half-full, thereby leaving the next smaller electron shell as the new, full valence shell. An atom with...
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Positive Regulator Molecules01:45

Positive Regulator Molecules

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To consistently produce healthy cells, the cell cycle—the process that generates daughter cells—must be precisely regulated.
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相关实验视频

Updated: Jul 13, 2025

Concentration of Metabolites from Low-density Planktonic Communities for Environmental Metabolomics using Nuclear Magnetic Resonance Spectroscopy
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Concentration of Metabolites from Low-density Planktonic Communities for Environmental Metabolomics using Nuclear Magnetic Resonance Spectroscopy

Published on: April 7, 2012

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对于分子的花波器.

Jorge Medina1, Andrew D White2

  • 1Department of Chemical Engineering, University of Rochester, Rochester, NY, USA.

Journal of cheminformatics
|October 12, 2023
PubMed
概括
此摘要是机器生成的。

布鲁姆过器提供高效,低内存的解决方案,用于检查超大化学库中的分子存在. 使用FNV散列的正规SMILES字符串提供快速,准确的会员测试,不到1%的错误阳性.

关键词:
布鲁姆过器 布鲁姆过器他们的指纹是指纹.哈希希 (Hashing) 是一个叫做哈希希 (Hashing) 的语言.斯米莱斯 (SMILES) 是一个有趣的小孩.

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科学领域:

  • 计算化学计算化学
  • 化学信息学 化学信息学
  • 数据结构 数据结构

背景情况:

  • 超大型的化学图书馆包含数十亿个分子.
  • 有效地搜索这些库的特定分子是一个重大挑战.

研究的目的:

  • 为了研究在大型化学图书馆中使用Bloom过器进行会员测试.
  • 用串和指纹分子表示来评估Bloom过器.

主要方法:

  • 布鲁姆过器被研究用于分子的会员测试.
  • 规范的SMILES字符串和分子指纹被用作表示.
  • 福勒-诺尔-沃尔 (FNV) 哈希函数被使用了正规的SMILES.

主要成果:

  • 布鲁姆过器可以存储数十亿个分子在千兆字节的内存中,在毫秒内检查会员资格.
  • 字符串表示,特别是正规的SMILES,实现了低于1%的错误阳性率.
  • 与指纹表示相比,字符串表示需要更少的存储空间.

结论:

  • 布鲁姆过器,特别是具有正规的SMILES和FNV散列,为测试分子存在提供了快速,准确和内存高效的方法.
  • 这种方法适用于管理和查询超大化学数据集.
  • 有可用于检查分子可购买性,专利状态和天然产品分类的实现.