Question 11An organic compound is known to contain only carbon, hydrogen and oxygen. The compound contains, by mass, 39.1% of carbon and 8.7% of hydrogen.The number of carbon atoms in the empirical formula is C A. I B. 2 C. 3 D. 4 ...
Organic compounds always contain carbon and a limited number of other elements, such as hydrogen, oxygen, and nitrogen. Compounds containing sulfur, phosphorus, and halogens are known but are less prevalent. Most organic compounds contain many more atoms per structural unit than inorganic compounds a...
All organic compounds contain carbon, and organic chemicals are the basic chemicals found in all living things. Many organic compounds in our air today do not occur naturally, but are instead human-made, formed during industrial processes or combustion. VOCs include a variety of chemicals, some ...
the container the ant was classified as dead. To ensure replicability of the survival experiments a negative (sterile PBS solution) and positive control (using a sterile PBS solution with 0.1 optical density (OD) ofPseudomonas aeruginosa(PSE)) were always included during each survival experiment. T...
Apart from the solvent (water, or organic) and drying agents (if used), all paint formulations contain a range of additives to improve performance. These include additives to improve the ‘in-can’ performance and application performance of the coating system (e.g. anti-skinning agents, anti-...
Considering that PECs contain a phenylethyl moiety, 4-hydroxyphenylpropionyl-CoA, rather than p-coumaroyl-CoA, was deliberately selected as the starter substrate for the reaction with malonyl-CoA, a canonical chain extender for PKSs, and the recombinant PECPS. The reaction specifically generated a ...
Isoelectric focusing in 0.3 mm thick gels which have been prepared by the technique of Radola (B. J. Radola, Elektrophoresis 1 (1980) 43-46) and contain ampholytes for the pH range 2-9 and 6M urea shows a similar pattern. The isoelectric point of the polypeptide according to the ...
Spectral complexity of a compound sometimes leads to confusion on its purity. Biflavonoids, for instance, always show substantial spectral complexity at the dimeric level due to hindered rotation between the flavanone and the flavanonol moieties around the C-3/C-8" axis. GB1 (3",4',4"',5...
Glycerophosphate is an organic compound naturally found in the body which is usually used as a source of phosphate in the treatment of unbalance of phosphate metabolism. In this review, the recent advances in the development of chitosan thermosensitive hydrogels based on different glycerophosphate are ...
Cellulose is an organic compound (C6H10O5)n is not soluble in dilute acid/alkali solutions and water at room temperatures. Cellulose establishes 30–50% of the total lignocellulosic biomass with a worldwide production evaluated to be 120–140 billion tons per year [166]. Cellulose is ...