Many copepods (small, herbivorous crustaceans) and invertebrate larvae pick out selected phytoplankton species from mixed groups, changing the species composition.A growing body of evidence now suggests that all of the factors considered here are operating simultaneously to produce species succession. The...
Which groups of hydrocarbons would lead to condensation polymerisation? Hydrocarbons contain only hydrogen and carbon. Which of the following is not a class of pure hydrocarbons? (a) Alkynes (b) Alcohols (c) Alkenes (d) Alkanes. Name four oxidizing agents that are commonly used in organic chemi...
Most of the rearrangements of boron ‘ate’ complexes reported in the literature involves the transfer of an organic group from the boron to the adjacent carbon. Herein we report formation of four-coordinate boron(III) complexes via an organic group migration between boronic acids in the presence ...
Compounds and are both composed of the bicapped heteropolyoxonibate core surrounded by a shell consisting of twelve [Cu(en)]groups, which represent a promising structural model toward core–shell nanostructures. Compounds and are also composed of a bicapped polyoxoanion [TNbVO](T = Si, Ge) ...
organic synthesis and heterocyclic biochemistry. Herein, we provide a thorough literature review on the microwave-assisted natural synthesis of selected heterocycles. We highlight the employment of microwave irradiation as a fruitful method for constructing a diverse range of particles with a high yield ...
In the crystalline, dimeric dialkylboryl derivatives of 5-amino-1,2,4-triazole the Alk 2 B groups are bonded to the ring N atoms. The crystalline and molecular structure of dipropylboryl[(1,2,4-triazol-5-yl)benzamidinate] (IXa) have been determined by X-ray crystallography....
Experimental/ dielectric properties of liquids and solutionsliquid crystal phase transformationsnematic liquid crystalsorganic compounds/ four unit linking groupsnegative dielectric anisotropy1-n-alkoxy-2,3-difluoro-4-[3-(trans-4-pentylcyclohexyl) propyloxy]-benzenes...
The five compounds are nordazepam (R H), diazepam (R CH 3 ), pinazepam (R CH 2 C CH), halazepam (R CH 2 CF 3 ) and prazepam (R cyclopropylmethyl). Prominent features of the infrared and Raman spectra have been assigned to functional groups of the parent structure and the ...
of four quasi-equivalent C–H bonds in a specially designed nitrogen-containing polycyclic hydrocarbon (N-PH). Density functional theory calculations reveal that the adsorption of N-PH on Ag(100) differentiates the activity of the fourorthoC(sp3) atoms in the N-heterocycles into two groups, ...
similar members of higher taxonomic groups, typically family or above)18,19for pollination by small Diptera20,21,22. Most species are considered to rely on deceptive pollination, trapping flies for a fixed period of time, during which pollen removal and/or deposition occurs. The level of special...