日本農芸化学会誌

健康・栄養に関与する細胞機能の生化学的研究

杉本悦郎

1994 年 68 巻 8 号 p. 1199-1205
発行日: 1994/08/01
公開日: 2008/02/14

DOIhttps://doi.org/10.1271/nogeikagaku1924.68.1199

ジャーナルフリー

PDF形式でダウンロード (1008K)
食品の物性,加工操作,フラクタル構造等に関する基礎工学的研究

矢野俊正

1994 年 68 巻 8 号 p. 1207-1214
発行日: 1994/08/01
公開日: 2008/02/14

DOIhttps://doi.org/10.1271/nogeikagaku1924.68.1207

ジャーナルフリー

PDF形式でダウンロード (809K)
蒸留酒の熟成指標としての¹⁷O-NMR半値幅について

大河内正一, 石原義正, 稲葉慎, 上平恒

1994 年 68 巻 8 号 p. 1215-1218
発行日: 1994/08/01
公開日: 2008/02/14

DOIhttps://doi.org/10.1271/nogeikagaku1924.68.1215

ジャーナルフリー

抄録を表示する抄録を非表示にする

The line width (full width at half maximum intenslty) of ¹⁷0 nuclear magnetic resonance signals and the spin-lattice relaxation time, T₁, of aged commerclal distilled spirits and aqueous ethanol solutions were measured at 298K. The values of T₁ for the ¹⁷O nucleus of water (which reflects the mobility of the water molecule) in both kinds of preparations did not change over the pH range of 2 to 13, but the line width broadened at pH from 5 to 9, as did that of pure water. That the broadenlng, whlch reached about 1OO Hz at pH7.0, depended on pH seemed to be due to changes in the exchange rates of protons. The T₁s of the aged commercial splrits and the ethanol solutions of the same concentration were almost the same. Therefore, when the line width of the ¹⁷0-NMR signal is to be used as an index of the aging of spirits, it must be taken into account that the width depends on the pH of the materials.

抄録全体を表示

PDF形式でダウンロード (467K)
イタリアンライグラスサイレージにおける乳酸桿菌ファージの検出頻度と発酵品質

金重尚子, 張嘩, 西山加奈子, 土居克実, 田中治, 大桃定洋, 緒方靖哉

1994 年 68 巻 8 号 p. 1219-1221
発行日: 1994/08/01
公開日: 2008/02/14

DOIhttps://doi.org/10.1271/nogeikagaku1924.68.1219

ジャーナルフリー

抄録を表示する抄録を非表示にする

Forty-one samples of Italian ryegrass silage were examined for the presence of phages in silage-making lactobacilli. For the detection of phages, 94 strains of Lactobacillus plantarunm and five strains of L.casei, all of which were newly isolatedfrom silage, five type strains of L. plantarum, three type strains of L.casei, and five commercially available strains were used. Only ten samples (24% of the silages) had phages. More than 45% of the strains tested, all L. plantarum, were infected by phages. Samples in which phages were detected usually were moist, had a high pH, and produced little lactic acid. In silages with pH4.l or below, no phages were detected. The higher the moisture content, the greater was the possibility of phage infection. The results showed that contamination by phages deteriorated the quality of the silages, and that phage control is needed.

抄録全体を表示

PDF形式でダウンロード (421K)