Optothermal nanotweezers are an innovative optical design method that has revolutionized classical optical techniques to capture a broad range of nanoparticles. While the optothermal temperature field can be employed for ...
New North Carolina State University research shows progress in gathering information on an important—yet difficult to characterize—human gut bacterium called Bifidobacterium, which is used in many probiotics that help ...
Cell & Microbiology
Jul 18, 2022
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90
Humans, Homo sapiens, have unique features compared with other closely related hominin species and primates, including the shape of the base of the skull. The evolutionary changes underlying these features were significant ...
Evolution
Apr 17, 2024
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57
Curly—or Karelian—birch is a mysterious tree with a patterned wood texture and a bizarre trunk shape. Unlike the elegant white-stemmed traditional birch, the Karelian one may seem unsightly at first glance: It is a low-growing, ...
Plants & Animals
Mar 22, 2024
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9
As life expectancy increases worldwide, age-associated diseases such as osteoporosis are having an increasing impact.
Biochemistry
Jul 19, 2023
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34
Humans contain multitudes. Each person on the planet contains enough DNA to stretch to Pluto—several times.
Molecular & Computational biology
Jun 29, 2023
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15
A team of global experts has discovered new signals of natural selection in humans.
Evolution
Mar 1, 2023
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27
Nearly 10,000 years ago, humans settling in the Fertile Crescent, the areas of the Middle East surrounding the Tigris and Euphrates rivers, made the first switch from hunter-gatherers to farmers. They developed close bonds ...
Evolution
Dec 5, 2022
0
222
Copy number variants (CNVs) are regions of the genome that are duplicated or deleted in some individuals, and are a common type of gene-disabling mutation. The human genome contains hundreds of thousands of CNVs, but typical ...
Cell & Microbiology
Oct 28, 2022
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58
A new study led by Imperial College London finds that drug-resistant mold is spreading from the environment and infecting susceptible people's lungs.
Cell & Microbiology
Apr 25, 2022
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40
A single-nucleotide polymorphism (SNP, pronounced snip) is a DNA sequence variation occurring when a single nucleotide — A, T, C, or G — in the genome (or other shared sequence) differs between members of a species (or between paired chromosomes in an individual). For example, two sequenced DNA fragments from different individuals, AAGCCTA to AAGCTTA, contain a difference in a single nucleotide. In this case we say that there are two alleles : C and T. Almost all common SNPs have only two alleles.
Within a population, SNPs can be assigned a minor allele frequency — the lowest allele frequency at a locus that is observed in a particular population. This is simply the lesser of the two allele frequencies for single-nucleotide polymorphisms[1]. There are variations between human populations, so a SNP allele that is common in one geographical or ethnic group may be much rarer in another.
This text uses material from Wikipedia, licensed under CC BY-SA
