n-Butyraldehyde adsorption on mesoporous silicas has been studied by volumetry followed by in situ infrared spectroscopy. Infrared spectra of butyraldehyde adsorbed onto porous silica have been recorded at different relative pressures. It is shown that adsorption occurs through the interaction b...
Butyraldehyde (butanal) is an irritant to skin, mucous membranes, and eyes. It is highly volatile and is quickly destroyed in the environment by photochemical processes.
The chitosan was found to possess an excellent catalytic performance in n-butyraldehyde self-condensation to 2E2H. Under suitable conditions, the conversion of n-butyraldehyde, the yield and selectivity of 2E2H separately attained 96.0%, 86.0% and 89.6%. The chitosan catalyst could be recovered ...
A series of lipophilic diaromatic derivatives of the glia-selective GABA uptake inhibitor (R)-4-amino-4,5,6,7-tetrahydrobenzo[d]isoxazol-3-ol [(R)-exo-THPO, 4] were synthesized via reductive amination of 3-ethoxy-4,5,6,7-tetrahydrobenzo[d]isoxazol-4-one (9) or via N-alkylation of O-alkylatedrace...
A new flexible approach to hexahydropyrrolo[2,3-b]indole system via the [3,3]-sigmatropic rearrangement of 1-(2′-methoxycarbonyl-N-methylvinylamino)skatole, culminating in the synthesis of (±)-desoxyeseroline, is described.
We tested a category approach to predict the hepatotoxic effects of repeated doses of allyl esters using a new database for repeated-dose toxicity. Based on information on hepatotoxic mechanism of allyl acetate, the category was defined as allyl esters that are hydrolyzed to allyl alcohol. Allyl...
In this project, three allyl esters from middle-chain fatty acids (allyl octanoate, allyl heptanoate and allyl hexanoate) and two from aromatic acids (allyl cinnamate and allyl 2-furoate) were investigated against two differential pests. Lethal and sublethal repellent effects by topical and inge...
Beverages and yogurts containing pineapple fruit or juice were analyzed in order to assess the variability of concentration levels of allyl hexanoate, present as added flavoring. Average concentrations in products with pineapple as the main fruit ingredient were in fair agreement with average us...
Free medium-chain fatty acids (MCFAs) can negatively influence the fermentation process and taste quality in alcoholic beverages. Ethyl hexanoate is important in providing a fruit-like flavour to drinks, particularly in Japanese sake. In this study, we developed a direct injection method for a g...
Binary and quaternary solubility of 2-ethyl-hexyl-2-ethyl hexanoate (2E2E) in supercritical carbon dioxide have been measured at flow rate of 250±10 ml/min, and (a) constant temperature of 313 K in the pressure range of 90–253 bar, (b) constant pressure of 170 bar, in the temperature range of ...
The barrier properties of one treated paper packaging and one standard plastic film (bi-oriented polypropylene, biOPP) were assessed for ethyl hexanoate. Three methods based either on sorption (gravimetry and micro-atmosphere-derived method) or permeation kinetic determination were used in contr...
This paper describes a direct precipitation reaction of clavulanic acid (CA) using potassium 2-ethyl hexanoate salt. Clavulanic acid is an important molecule produced by the pharmaceutical industry to overcome problems relating to bacterial resistance to antibiotics. However, precipitation of th...
Fatty acid ethyl esters (FAEEs) are the main components in some biodiesels, which are important alternatives of fossil fuels. In this paper, we carry out the measurements of the speed of sound in two FAEEs at the temperatures from (293.15 to 473.15) K and at the pressures up to 10 MPa, including...
This study aimed at isolating and culturing Bacilli from the omagari, pit mud, and fermented grains used in Luzhou-flavor liquor in an effort to produce better flavor and quality. After an enrichment culture of Bacillus in the omagari, pit mud, and fermented grains of Luzhou-flavor liquor, 52 to...
The coordination of biologically active moieties to the axial positions of Pt(IV) derivatives of Pt(II) anticancer drugs allows the co-delivery and simultaneous activation of two pro-drugs for combination therapy. Pt(IV) complexes with a redox modulator as an axial ligand can kill cancer cells b...
We have discovered a low pressure and low temperature process for the single step conversion of ethylene and carbon monoxide to either propionic acid or anhydride utilizing surprisingly active, inexpensive Cr group based catalysts which operate at very high rates under low-to-moderate pressures ...
N-Terminal isotope tagging (NIT) is an important proteomic tool for quantifying proteins in complex mixtures. Here we describe a modified version of the isotope-coded propionylation procedure of Zhang et al. [Zhang et al., Rapid Commun. Mass Spectom. 16 (2002) 2325], which uses ‘light’ D0 and ...
Chemical modification of the cassava starch was conducted through acylation by using propionic anhydride as an esterifying reagent. The reaction was carried out in the presence of a pyridine catalyst and the effects of reaction variables such as the anhydride content, reaction time and reaction ...
The basic requirement of human beings is better health but the serious health effects and numerous infections caused by rapid growth of harmful pathogens resulting in a large number of deaths and is a significant challenge to modern science. Microbes infecting humans can be stopped in two ways: ...
Pt-based catalysts, supported on Al2O3, SiO2 and SiO2–Al2O3, were prepared by incipient wetness impregnation and tested in the gas phase hydrogenation of maleic anhydride at atmospheric pressure and 240 °C. In these conditions, the hydrogenolytic activity pattern was: Pt/SiO2 > Pt/Al2O3 > Pt/S...
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