Even different concentrations of a single compound can be perceived as distinct stimuli93. High species specificity of many sexual chemical signals indicates they often diversify rapidly94. This diversity has made chemical signals an especially useful model of studying the evolution of communication94. ...
Target Fishing for Chemical Compounds Using Target-Ligand Activity Data and Ranking Based Methods In recent years, the development of computational techniques that identify all the likely targets for a given chemical compound, also termed as the problem... N Wale,G Karypis - 《Journal of Chemical...
Epoxy resin compositions for printed circuit board and printed circuit board using the same An epoxy resin composition for a printed circuit board includes an epoxy resin; a multi-functional phenol group; a hardening accelerator; and at least one of a compound having a triazine or isocyanurate rin...
numberofnuclearcharges(.,protons)8atom:thesmallestparticleinchemicalchange,whichcannotbesubdividedinchemicalchangeMolecules:thesmallestparticlesthatretainthechemicalpropertiesofthematerialandcanbesubdividedinchemicalchangesSimplesubstanceconsistingofthesameelementsCompound:posedofvariouselementsOxide:acompoundoftwoelements,...
sealing gaps in rock mass, ground, and artificial constructions, comprising an aqueous solution of alkali silicate, a tertiary amine, surfactant and organic polyisocyanate compound.MAKI HIROHISA牧 宏久MATSUSHITA NOBUAKI松下 伸顕ICHII SUMIMASA市井 純正...
Where a compound only contains nonmetal atoms, a covalent bond is formed by atoms sharing two or more electrons. Nonmetals have four or more electrons in their outer shells (except boron). With these many electrons in the outer shell, it would require more energy to remove the electrons than...
The limiting value for drinking water is 0.01mg/L Se in Germany. 1.3 Calcium(Ca) But even a“common”element such as calcium Ca that is normally the main cation of surface-and shallow groundwater can be harmful.As an element of biologic importance it is an essential compound e.g.in bone...
aFertilizers contain these basic elements either in soluble or readily available chemical compound form and can usually be purchased from commercial sources such as garden centers, nurseries, and the like. 正在翻译,请等待...[translate]
Google Share on Facebook chemical agent Thesaurus Medical Legal Financial Encyclopedia Wikipedia Related to chemical agent:biological agent,Chemical warfare agent Any toxic chemical intended for use in military operations. See also chemical ammunition; chemical defense; chemical dose; chemical environment; ...
Chemical Constituents of the L-Acetate Fraction. The major L-acetate fraction's relative concentra- tions of organic compounds are listed in Table 3, and the features of the GC-MS results for the propolis samples are shown in Fig. 6. The major extractable organic compound primarily ...