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関連する概念動画

Acidity of 1-Alkynes02:42

Acidity of 1-Alkynes

11.1K

The acidic strength of hydrocarbons follows the order: Alkynes > Alkenes > Alkanes. The strength of an acid is commonly expressed in units of pKa — the lower the pKa, the stronger the acid. Among the hydrocarbons, terminal alkynes have lower pKa values and are, therefore, more acidic. For example, the pKa values for ethane, ethene, and acetylene are 51, 44, and 25, respectively, as shown here.
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Ultrasound Cyclo Plasty in Eyes with Glaucoma05:05

Ultrasound Cyclo Plasty in Eyes with Glaucoma

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Glaucoma is a chronic disease with progressive degeneration of optic nerve fibers resulting in decreased visual field. Elevated intraocular pressure is considered the most important and the only treatable risk factor. This manuscript describes a simple, surgeon-friendly, non-incisional technique, named Ultrasound Cyclo Plasty, for reducing intraocular pressure in glaucoma...
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High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment07:26

High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment

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Here, we describe an innovative method to determine complement receptor 1 (CR1) length polymorphisms for use in several applications, particularly the assessment of susceptibility to diseases such as Alzheimer's disease (AD). This method could be useful to better understand the role of CR1 isoforms in the pathogenesis of...
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Preparation of Hydroxy-PAAm Hydrogels for Decoupling the Effects of Mechanotransduction Cues11:31

Preparation of Hydroxy-PAAm Hydrogels for Decoupling the Effects of Mechanotransduction Cues

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We present a new polyacrylamide hydrogel, called hydroxy-PAAm, that allows a direct binding of ECM proteins with minimal cost or expertise. The combination of hydroxy-PAAm hydrogels with microcontact printing facilitates independent control of many cues of the natural cell microenvironment for studying cellular...
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Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing07:24

Genotyping Single Nucleotide Polymorphisms in the Mitochondrial Genome by Pyrosequencing

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Pyrosequencing assays enable the robust and rapid genotyping of mitochondrial DNA single nucleotide polymorphisms in heteroplasmic cells or tissues.
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Single Nucleotide Polymorphisms-SNPs01:05

Single Nucleotide Polymorphisms-SNPs

17.9K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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関連する実験動画

Updated: Jan 20, 2026

Ultrasound Cyclo Plasty in Eyes with Glaucoma
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Ultrasound Cyclo Plasty in Eyes with Glaucoma

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1-ヒドロキシ-シクロヘキサンカルボン酸の三斜晶系多形

Lubabalo Ndima1, Eric Cyriel Hosten1, Richard Betz1

  • 1Nelson Mandela University, Summerstrand Campus, Department of Chemistry, University Way, Summerstrand, PO Box 77000, Port Elizabeth, 6031, South Africa.

IUCrData
|January 19, 2026
PubMed
まとめ

この研究は、α-ヒドロキシカルボン酸であるC7H12O3を特徴づけるものである。分子解析により、結晶格子内のシート状構造を形成する水素結合が明らかになった。

科学分野:

  • 結晶学
  • 有機化学
  • 材料科学

背景:

  • α-ヒドロキシカルボン酸は、多様な用途を持つ有機化合物である。
  • このような化合物の結晶構造を理解することは、それらの物理的および化学的特性を予測するために重要である。

研究 の 目的:

  • 標題化合物C7H12O3の結晶構造を解明すること。
  • その固相配列を支配する分子間相互作用を調査すること。

主な方法:

  • 単結晶X線回折を用いて、分子および結晶構造を決定した。
  • 水素結合ネットワークの解析を行った。

主要な成果:

  • 非対称単位にはC7H12O3の2つの分子が含まれる。
  • O-H…O水素結合が主要な分子間力として同定された。
  • これらの水素結合は、b軸に垂直なシート状に分子を組織化する。

結論:

  • C7H12O3の結晶構造は、水素結合によって駆動されるシート状配列を特徴とする。
  • この構造的洞察は、材料科学および有機合成における潜在的な応用の基礎となる。
キーワード:
結晶構造多形

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Acidity of Terminal Alkynes: Formation of Acetylide Anions
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関連する実験動画

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High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment
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High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment

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Acidity of Terminal Alkynes: Formation of Acetylide Anions
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Acidity of Terminal Alkynes: Formation of Acetylide Anions

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