PREs were first discovered in flies, in which they can mediate epigenetic memory of both silent and active states of their associated genes. Epigenetic memory has not yet been tested for mammalian PREs. Silent and activated states are each ensured by several self-reinforcing molecular mechanisms ...
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If the molar mass of the compound is 46.07 g/mol, what is the molecular formula? What is a compound? What compound is this? You have two unknown compounds that are composed of non-metals. Compound X has a melting poin...
Compounds:Chemical compounds are substances formed by the reaction of two or more chemical elements. Compounds usually have characteristics which are very different from those of the elements they are made of.Answer and Explanation: Compounds can be classified as covalent or ionic. Covalent compounds ...
For one thing, they are complex and giant molecules and are different from low molecular weight compounds like, say, common salt. To contrast the difference, the molecular weight of common salt is only 58.5, while that of a polymer can be as high as several hundred thousand thousands. These...
(Read more about this in our article on molecular beam epitaxy.) Photo: Ion implantation being carried out in an ultra-high vacuum chamber at Oak Ridge National Laboratory. Photo courtesy of US Department of Energy (Flickr). Some common alloys and what we use them for There are zillions of...
Higher concentration gels can separate or resolve smaller sized proteins, while lower concentration gels, with larger pore sizes, are better at resolving higher molecular weight proteins. Unlike fixed concentration gels, gradient gels are formulated with a range of polyacrylamide concentrations, where the...
An investigation of the endogenous formation of apparent total N-nitroso compounds in conventional microflora and germ-free rats. Food Chem. Toxicol. 26, 595–600 (1988). Article CAS PubMed Google Scholar FDA. Food additives and ingredients. Food and Drug Agency https://www.fda.gov/Food/...
They are man-made elements. Pure substances composed of two or more elements are called compounds.Because they contain two or more elements,compounds,unlike elements,are capable of being decomposed into simpler substances by chemical changes. The ultimate chemical decomposition of compounds produces the...
What kind of compounds are named using prefixes? Naming with Prefixes: When it comes to chemical compounds, there are certain rules that are used to name specific compounds such as using prefixes. Prefixes are words that come before the chemical element to depict the number of elements. ...