SummaryPotato tuberization is promoted by short days and inhibited by applications of gibberellin (GA). Wildtype Solanum tuberosum ssp. andigena required short days for tuberization, whereas their dwarf siblings tuberized under long days. Nevertheless, shortening the photoperiod also enhanced tu...

Favorskii rearrangement of a chloro-enol-lactone (7), obtained in two steps from the diterpene epicandicandiol (1), afforded 9, which after hydrolysis led to the gibberellin A12 isomer 10 The stereochemistry of the affected centres has been established as 5α-H, 6β-H revising the previously ass...

A cell-free system capable of gibberellin (GA) biosynthesis has been prepared from immature seed of Phaseolus coccineus. This system converted [14C]mevalonic acid (MVA) to ent-kaurene, ent-kaurenoic acid, ent-Kauradienoic acid, ent-7α-hydroxykaurenoic acid, ent-6α,7α-dihydroxykaurenoic acid, ...

SummaryMetabolism of [14C] gibberellin(GA)12-aldehyde and [14C]GA12 in vegetative tissue of potato (Solanum tuberosum ssp. andigena) was studied by supplying solutions of these compounds to the base of isolated shoot tips and analyzing the metabolic products by radiodetection after HPLC. Endogen...

While gibberellin (GA) A12 and GA12-7-aldehyde have been well established as intermediates in GA biosynthesis, their presence in higher plants has not been conclusively demonstrated, with the exception of GA12-aldehyde in mature pea seeds. High specific activity [14C] GA12 and [14C]GA12-aldehyde...

The biochemical synthesis of labeled gibberellin A12-7-aldehyde (GA12ald) and gibberellin A12 (GA12) from labeled R,S-mevalonic acid (MVA) using cell-free extracts from pumpkin (Cucurbita maxima) endosperm has been improved over the previously reported procedure. Three major improvements were (a...

The conformational behavior and structural stability of 3-chloropropanal and 3-fluoropropanal were investigated by ab initio calculations. The 6-311++G∗∗ basis set was employed to include polarization and diffuse functions in the calculations at B3LYP level. The compounds were predicted to exist...

Propanal and 3-chloropropanal have been studied in solid Ar and N2 matrices. A fast IR-induced cis → gauche process was found for propanal, whereas the reverse process occurred in the dark upon warming the matrices. A very fast process was found for 3-chloropropanal in Ar; in N2 it was 60 times...

The rare earth elements (La, Ce, Nd, Sm, Pr, and Gd) modified Pt/Al2O3 catalysts were prepared by the colloidal deposition and chemical reduction methods, respectively. Pt nanoparticles with average size 3 ± 0.5 nm were uniformly dispersed on the surface of Al2O3 for the samples prepared by the...

A pyrethroid-degrading bacterium strain JZ-2 was isolated from activated sludge treating pyrethroid-manufacturing wastewater. Based on the morphological, physiological and biochemical characterization, and phylogenetic analysis of the 16S rRNA gene sequence, the strain was identified as Sphingob...

A novel series of 5-bromo-pyrimidine derivatives (5a-l, 6a-h, 9a-m and 10a-d) were synthesized through multi step reactions starting from 5-bromo-2,4-dichloro pyrimidine. The newly synthesized compounds were characterized using elemental analysis and spectral data (IR, 1H NMR, 13C NMR and LC-MS)...

The readily available 2,3-dibromo-1-(phenylsulfonyl)-1-propene (DBP) undergoes facile reaction with several 1,3-dicarbonyl compounds under basic conditions to give (phenylsulfonyl)methyl substituted cyclopentenones. The pendant sulfonyl group at the C3 position of the cyclopentenone ring offers ...

The Friedel-Crafts alkylation reactions of electron rich aromatic compounds using methyl α-chloro-α-methoxyacetate and Lewis acids leads predominantly to the formation of diarylacetic acid derivatives in which the second stage of the sequence is favoured by the presence of hydrogen chloride ge...

Biotransformations of curcumenol (1) were performed by four fungal strains, Mucor spinosus AS 3.2450, Penicillium urticae IFFI 04015, Cunninghamella echinulata AS 3.3400, Aspergillus carbonarius IFFI 02087. Five metabolites were prepared in the biotransformation process of 1, and their structure...

Endoproteinase lysine-C (Lys-C)/trypsin sequential digestion and trypsin digestion were used in 293T cell proteomics sample preparation and the differences of Lys-C/trypsin sequential digestion and trypsin digestion in proteomics sample preparation were systematically evaluated. It was found tha...

The absorption performance of CO2 in 1-butyl-3-methylimidazolium lysinate ([Bmim][Lys]) promoted N-methyldiethanolamine (MDEA) aqueous solution was investigated at the temperatures ranging from 303.2 K to 323.2 K. The mass fractions of MDEA and [Bmim][Lys] respectively ranged from 0.3 to 0.45 an...

Fermentation is a good way to utilize fish by-products. In this study, the effects of mixed starter cultures and exogenous L-Lys on the physiochemical and sensory properties of fermented longsnout catfish minced meat were investigated. Fish pastes were divided into three groups, including a trea...

A substance has been isolated from extracts of the common carrot, Daucus carota, which is toxic to the bioassay organism Daphnia magna and to mice. Physical and chemical evidence showed this compound, termed carotatoxin, to be trans-1,10-heptadecadiene-5,7-diyn-3-ol (III).

3-Alkyl-5-phenyl-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7(6H)-ones were prepared by nitrosative cyclization of the appropriate 5,6-diamino-2-phenylpyrimidin-4(3H)-ones with nitrous acid and were subjected to regioselective alkylation with several alkylating agents in aprotic solvent at different tem...

Arylalkylamine N-acyltransferase like 2 (AANATL2) catalyzes the formation of N-acylarylalkylamides from the corresponding acyl-CoA and arylalkylamine. The N-acylation of biogenic amines in Drosophila melanogaster is a critical step for the inactivation of neurotransmitters, cuticle sclerotizatio...