chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter azote - an obsolete name for nitrogen air - a mixture of gases (especially oxygen) requir...
The leaves usually are pinnately compound (feather formed), sometimes trifoliate (with three leaflets), or palmate (the leaflets radiating from a common point). The leaves of a few species are simple or reduced to scales. The fruit is typically a legume, or pod, which splits open as it ...
The element nitrogen was discovered by Scottish physician Daniel Rutherford in 1772. Nitrogen occurs in all living organisms. It is a constituent element of amino acids and thus of proteins, and of nucleic acids (DNA and RNA). It resides in the chemical structure of almost all neurotransmitters...
nitrogen (N), nonmetallic element of Group 15 [Va] of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth’s atmosphere and is a constituent of all living matter. Element Properties atomic number 7 atomic weight 14.0067 melting point ...
A composition for agricultural and other actives, comprising a finely-divided particulate combination of microcrystalline cellulose, at least one nitrogen compound such as urea, an ammonium sulfate or phosphate and, optionally, a suspending agent for the micro-crystalline cellulose. The composition can ...
This, the only known compound of hydrogen with nitro-gen, is a gas of the molecular formula NH3. The most convenient process for the preparation of the pure gas is to mix powdered sal-ammoniac with powdered quicklime in a flask and to heat the mixture in a sand-bath. Torrents of ammon...
and Lavoisier also obtained nitrogen independently more or less around the same time. Nitrogen was recognized first as an element by Lavoisier, who named it “azote”, meaning “without life.” The element was named nitrogen in 1790 by Chaptal. The name derived from the Greek name ‘nitre’ ...
First the density of the color was checked against a standard to verify that the test compound was not interfering with the basic color forming reaction. Then the density of color formed in the block exposed first to visible light and then to UV was compared to assess the effectiveness of ...
[38]. An ideal inducible promoter should be easy to induce by an altering environmental parameter, such as addition or depletion of a preferably cheap chemical compound or by changing a physiochemical parameter (temperature, pH, aeration, etc.); likewise, it should ideally be just as easy to ...
File failed to load: https://cdn.jsdelivr.net/npm/mathjax@2.7.5/jax/element/mml/optable/BasicLatin.js Your privacy, your choice We use essential cookies to make sure the site can function. We also use optional cookies for advertising, personalisation of content, usage analysis, and social...