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Biomedical subjects

T Matsui

Publications and source records attributed to T Matsui.

At least 1,045 records · Page 58Linked to original sources
PubMed1981

Contents and compositions of the aroma in "Wasanbon" sugar.

"Wasanbon" sugar is handmade sugar which has been manufactured traditionally in Japan by a unique refining procedure, and is used in the making of Japanese traditional confectionary. No reports have been published on the substances responsible for the unique aroma of "Wasabon" sugar. In this paper, the contents and compositions of the aroma in "Wasabon" sugar and refinery final molasses are reported as studied by column chromatography, gas chromatography, mass spectrometry and sensory evaluation. The samples are the first press-off molasses ("Ara-mitsu" molasses) refinery final molasses, "Shiroshita" sugar (prerefined sugar) and "Wasabon" sugar. The summarized results are as follows: In the acidic fraction, the aroma of 3-phenylpropionic acid is similar to the stored aroma of "Wasabon" sugar, whereas the aroma of its methyl ester was not similar to that aroma. Although aroma contents of the weakly acidic fraction in "Wasabon" sugar and refinery final molasses are 8.5 to 8.7% of those of the acidic fraction, and their main components are cyclotene and maltol, which are formed by thermal degradation of sugar. These components show a higher preference than other weakly acidic fraction aromas, by a paired preference test. Cyclotene and maltol increased about 3.7 and 1.5 times, respectively, by the heating of "Shiroshita" sugar.

Candy↗
PubMed1981

Greening pigments produced reaction of ethyl caffeate with methylamine.

Little is known about the greening reaction of chlorogenic acid with amino acid in alkaline conditions. The isolation and characterization of the pigment were attempted by using ethyl caffeate and methylamine instead of chlorogenic acid and amino acid. The green compounds were purified by using Sephadex G-10 and thin layer chromatography, and were analyzed by ESR and C-13 MNR. The ESR spectrum of F3 (corresponding to purified pigment) in a liquid state showed that the structure of the C-OH moiety seemed to give either the quinone type or its polymerized form. The ESR spectrum of F3 in a solid state showed that the g-value of this fraction was 2.003. On the basis of the C-13 NMR spectrum, the signals assigned to two carbons (C1" and C-2") of the alcohol moiety of ethyl caffeate were observed clearly in F3. Considering the chemical shift of C-1 in ethyl caffeate, the C-1 in F3 could exist as -C=N-CH3. F3 seemed to be a precursor of the greening compound.

Amino Acids↗
PubMed1981

The fine structure of the merozoites and gametocytes of Leucocytozoon caulleryi.

The fine structure of the merozoites and gametocytes of Leucocytozoon caulleryi from the peripheral blood of chickens was studied by means of electron microscopy. Merozoites are oval to elongate and are surrounded by a pellicle. They possess a large nucleus, numerous ribosomes, microtubules, a mitochondrion with tubular cristae, a cytostome, an apical complex consisting of three polar rings, electron-dense paired rhoptries, and micronemes. Mature gametocytes are irregular in shape and are surrounded by a three layered pellicle, and contain a large nucleus, mitochondria with tubular cristae, endoplasmic reticulum, numerous ribosomes, food vacuoles, cytostomes, and lipid inclusions. Macrogametocytes are easily distinguished from the microgametocytes by more ribosome concentration and the presence of well developed endoplasmatic reticulum.

Animals↗