HBr (1–0) R2 2605.8/6.2 cm−1, the strongest line of the strongest band of HBr, was observed when searching for this species on Venus. The observation was conducted using the NASA IRTF and a high-resolution long-slit spectrograph CSHELL with resolving power of 4 × 104. 101 spectra of Venus were...

Features of plasma chemistry as well as peculiarities of etching mechanisms for Si and SiO2 in the HBr + Cl2 + O2 gas mixture with variable HBr/O2 mixing ratio were investigated using a combination of experimental and theoretical approaches. Plasma diagnostics by Langmuir probe and 0-dimensional...

The kinetics of CHClBr + HBr ⇄ CH2ClBr + Br (1, -1), CCl2Br + HBr ⇄ CHCl2Br + Br (2, -2) and CClBr2 + HBr ⇄ CHClBr2 + Br (3, -3) reactions at 293–787 K has been studied by using the canonical transition state theory with molecular information provided by different quantum chemical methods. The ...

Growing concern and interest in glucosinolates have given inspiration to the rapid development of the analytical field. In spite of the importance of the quantification of total and individual glucosinolates to the edible oil industry, to animal feed compounders, and to plant breeders and nutrit...

Glucosinolates (β-thioglucoside-N-hydroxysulfates), the precursors of isothiocyanates, are present in sixteen families of dicotyledonous angiosperms including a large number of edible species. At least 120 different glucosinolates have been identified in these plants, although closely related t...

(E)-2-[2,3-2H2]propenyl glucosinolate was synthesised starting from (E)-[3,4-2H2]but-3-en-1-ol, which was produced by reduction of but-3-yn-1-ol with deuterium gas in the presence of Lindlar’s catalyst. The synthesis of (E)-2-[2,3-2H2]propenyl glucosinolate was completed via the nitro intermedi...

Glucosinolate (GSL) and antioxidant activity in 62 varieties of Chinese cabbage (Brassica rapa L. ssp. pekinensis) were determined by HPLC and DPPH, HRSA, and FRAP assays. Five aliphatic GSLs: progoitrin, sinigrin, glucoalyssin, gluconapin, and glucobrassicanapin; four indolyl GSLs: 4-hydroxyglu...

Dietary glucosinolates are under intensive investigation as precursors of cancer-preventive isothiocyanates. Quantitation of the dose and bioavailability of glucosinolates and isothiocyanates requires a comprehensive analysis of the major dietary glucosinolates, isothiocyanates, and related meta...

Some of the health-promoting properties of cruciferous vegetables are thought to be partly attributed to isothiocyanates. These phytochemicals can upregulate the expression of certain cytoprotective stress genes, but it is unknown if a particular nutrient is involved. Herein, the objective was t...

Epidemiological studies have shown that consumption of Brassica vegetables decrease the risk of cancer. These associations are linked to dietary intake of glucosinolates and their metabolism to cancer preventive isothiocyanates. Bioavailability of glucosinolates and related isothiocyanates are i...

Plant samples of Hornungia petraea were analyzed for glucosinolate (GLS) autolysis metabolites for the first time. GC–MS analysis of the autolysate and the synthesis of a series (12 compounds) of possible glucosinolate breakdown products revealed/corroborated the presence of glucoaubrietin, glu...

Broccoli (Brassica oleracea L. var. italica) sprouts contain glucosinolates (GLs) that when hydrolysed yield health promoting isothiocyanates such as sulforaphane (SF). SF content can be increased by salt (NaCl) stress, although high salt concentrations negatively impact plant growth. Salicylic ...

Brassicoraphanus ‘BB1’ is an inter-generic hybrid vegetable between Chinese cabbage (Brassica rapa L. ‘Bulam 3’) and radish (Raphanus sativus L. ‘Taebaek’), maintaining high glucosinolates during their development. Postharvest changes in glucosinolate content and their corresponding hydrol...

The results of the characterization of a polymer electrolyte system based on the poly(trimethylene carbonate) host matrix, with lithium hexafluoroantimonate as guest salt, are described in this study. Electrolytes with lithium salt compositions with values of n between 5 and 100 (where n represe...

(8S,8′R,9S)-, (8R,8′R,9R)-, and (8R,8′R,9S)-cubebins, together with (8R,8′R,8″R,8‴R,9R,9″S)-bicubebin, were isolated from Aristolochia lagesiana and Aristolochia pubescens. Their structures were determined by spectroscopic methods, including 1H and 13C NMR spectroscopy at low temperatures,...

Five (−)-cubebin derivative compounds, (−)-O-acetyl cubebin (3), (−)-O-benzyl cubebin (4), (−)-O-(N,N-dimethylaminoethyl)-cubebin (5), (−)-hinokinin (6) and (−)-6,6′-dinitrohinokinin (7), previously synthesised by our research group, were evaluated on in vitro assay against free amastigote form...

(−)-Cubebin showed a melanogenesis stimulation activity in a concentration-dependent manner in murine B16 melanoma cells without any significant effects on cell proliferation. Tyrosinase activity was increased at 24–72 h after addition of cubebin to B16 cells, and then intracellular melanin amo...

The anti-inflammatory and antinociceptive effects of the acetylated (2), methylated (3) and aminated (4) derivatives of cubebin (1), obtained by its reaction with acetic anhydride, methyl iodide and dimethylethylamine chloride, respectively, were investigated, using different animal models. The ...

Recent publications have highlighted the numerous biological activities attributed to the lignan (−)-cubebin (1), Piper cubeba L. f., Piperaceae, and ongoing studies have focused on its structural optimization, in order to obtain derivatives with greater pharmacological potential. The aim of thi...

A catalytic system consisting of iron tetraphenylporphyrin supported on an alumina matrix for oxidation of (−)-cubebin with iodosylbenzene or hydrogen peroxide is reported. Conversion of (−)-cubebin is very efficient (100%) with 100% selectivity producing only (−)-hinokinin when iodosylbenzene i...