巻号一覧
11 巻, 3 号
選択された号の論文の9件中1～9を表示しています
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川崎 近太郎, 永納 秀男, 河野 桂子, 飯尾 利弘, 近藤 雅臣1970 年 11 巻 3 号 p. 139-142
発行日: 1970/06/05
公開日: 2010/02/22
ジャーナル フリー過酸化水素処理めんについて大腸菌, 腸炎ビブリオおよび枯草菌とその芽胞にたいする残留過酸化水素の濃度と殺菌効果の関係を検討した. 腸炎ビブリオは77ppmで, また大腸菌には160ppmで完全に殺菌効果を示した.
枯草菌では77ppmで菌数の増加は抑制され, 315ppmで完全な殺菌効果を示したが, 芽胞については500ppmでも効果はなかった.
これらより“めん”1gあたり102～103の初菌数において, 100ppmの過酸化水素が残存しておれば菌の増殖抑制効果を期待しうると考えられた. 過酸化水素の殺菌効果に関し, 過酸化水素の大腸菌, 腸炎ビブリオにおよぼす影響をその生存率より検討し, その殺菌効果は過酸化水素の濃度のみに依存するのでなく, 菌体量にも関係があり, 菌体量と過酸化水素の比が重視されねばならないことが判明した。
その比をH2O2mg/mg cell Nで示せば大腸菌では50以上, 腸炎ビブリオでは17以上で有効であった.抄録全体を表示PDF形式でダウンロード (713K) -
竹下 隆三, 赤木 洋勝, 谷村 顕雄, 菅野 三郎1970 年 11 巻 3 号 p. 143-146
発行日: 1970/06/05
公開日: 2010/02/22
ジャーナル フリーPropionic acid was separated by steam distillation from samples acidified with phosphoric acid and collected into alkaline solution.
An aliquot of the distillate containing from 2.5mg to 10mg of propionic acid was evaporated to dryness. The acid was then liberated through acation exchange resin, Dowex 50 X8-H type, column (1cm×3cm).
One to two microliters of the eluate containing Propionic acid and trans-crotonic acid as an internal standard was injected directly into the gas-chromatographic column (φ-4mm×3m) with Chromosorb 101. The lower determination limit was 0.002ppm.
Recovery of propionic acid added at 1250, 2500 and 5000ppm levels to bread and sponge cake were 96.3-100.6%.抄録全体を表示PDF形式でダウンロード (653K) -
溶出スズの分布と挙動堀尾 嘉友, 岩本 喜伴, 小村 祥子1970 年 11 巻 3 号 p. 147-154
発行日: 1970/06/05
公開日: 2010/02/22
ジャーナル フリーPlain tin cans are generally used as the containers for fruits juice or fruit products. It has been reported in many literatures on dissolved tin in canned foods during storage, but a few on its distribution and behavior. The purpose of this study is to establish the physical and chemical properties of dissolved tin.
Results obtained are as follows: 1) Distribution of dissolved tin a) in canned juice drinks and juice was higher in liquid than in solid materials, and was detected in liquor in easily dialyzable form, and b) in canned fruits higher in drained solids than in liquid. 2) When the homogenates of canned fruits is separated into the supernatant and precipitate by using a centrifuge, considerable amount of tin was detected in the precipitate, and it is not easily dissolved by repeated washings with water or dialysis against water. Moreover it was hardly solubilized even with the action of such enzymatic systems as the artificial gastric juice, cellulase or pectinase in acid media, whereas only about 0-15% of tin remained after the reaction of the artificial intestinal juice. It was confirmed, however, that the artificial intestinal juice merely provides its alkalinity and the enzyme is not taking significant parts in the solubilization of tin. 3) The conversion of soluble form tin to insoluble form was studied with model systems. When fiber is added to the canned juice model, no appreciable amount of tin was transferred to the fiber, while when mandarin orange pulp is added, considerable amount of tin was accumulated in the orange pulp.抄録全体を表示PDF形式でダウンロード (1370K) -
川崎 近太郎, 永納 秀男, 飯尾 利弘, 近藤 雅臣1970 年 11 巻 3 号 p. 155-160
発行日: 1970/06/05
公開日: 2010/03/25
ジャーナル フリー過酸化水素の細菌菌体内酵素におよぼす影響を大腸菌および腸炎ビブリオを用いて検討した. 過酸化水素処理菌体の各種酵素活性は低下し, とくにAldolaseおよびAconitate hydrataseの活性が強く阻害されていた. その活性阻害度は殺菌効果と同様に過酸化水素濃度のみでなく菌体量にも関連することが明らかとなった.
これらの結果から, 過酸化水素は菌体内の特定酵素を阻害するのでなく, 酵素系全般に影響を与えることが明らかとなった.
また, 無細胞抽出液および粗酵素を過酸化水素処理した際, 抽出菌の種類には関係なく酵素タンパク量に対する過酸化水素量の比に比例して, 酵素阻害がおこることが観察された.
過酸化水素の芽胞菌体におよぼす影響を枯草菌芽胞を用いて検討した. 枯草菌芽胞は, 400mg H2O2/mg SporeNで80°, 30分の加熱処理で完全に死滅し, その際, 多量のDPAを菌体外に流出した. また, 過酸化水素処理をすると芽胞殼成分中にシステイン酸が検出され, その内層成分に質的, かつ量的に大きな変化が認められた.抄録全体を表示PDF形式でダウンロード (1027K) -
包装材料に対するプロピレンオキサイドの残留平島 孝正, 小熊 崇, 細貝 祐太郎, 藤井 清次1970 年 11 巻 3 号 p. 161-163
発行日: 1970/06/05
公開日: 2010/02/22
ジャーナル フリーResidues of propylene oxide in food wrappings and containers fumigated with its vapor were determined by means of gas chromatographic method.
Results are shown in the Table 1.
The residue was probably caused by being dissolved in the various plasticizers contained in plastic food wrapPings and containers or being absorbed on the surface of wood materials.抄録全体を表示PDF形式でダウンロード (500K) -
II 合成保存料について (5) 種々の条件下におけるデヒドロ酢酸の経時変化佐々木 清司1970 年 11 巻 3 号 p. 164-170
発行日: 1970/06/05
公開日: 2010/02/22
ジャーナル フリーThe purpose of this work was to examine the transformation of dehydroacetic acid under various conditions and to determine acute toxicities of dehydroacetic acid and its transformation products.
It may be concluded from the results of this investigation that the pH value of the solution in which the dehydroacetic acid is dissolved is one of the main factors in the transformation of dehydroacetic acid. Although dehydroacetic acid was very stable in neutral solution, it was transformed into 2, 6-dimethyl-4-pyrone in acid solution. No formation of 2, 6-dimethyl-4-pyrone was observed except decomposition and degradation of dehydroacetic acid in alkaline solution.
Either transformation or degradation of dehydroacetic acid was influenced by the temperature of these three types of solution, and lights had the action to destroy dehydroacetic acid in these three types of solution.
On acute toxicities of dehydroacetic acid and its transformation products, the oral LD50 (and 95% confidence limits) in mice were found to be 1.33g/kg (1.23-1.44g/kg) for dehydroacetic acid, 0.65g/kg (0.59-0.72g/kg) for diacetylacetone, and 1.67g/kg (1.49-1.88g/kg) for 2, 6-dimethyl-4-pyrone.抄録全体を表示PDF形式でダウンロード (1168K) -
矢田 光子, 今井田 雅示, 小林 太郎1970 年 11 巻 3 号 p. 171-176
発行日: 1970/06/05
公開日: 2010/02/22
ジャーナル フリーCortinellus Shiitake (C.S.) on the market was applied to detection of formaldehyde by the official method, proving positive in the various reaction. For identification, the infrared absorption spectrum of reaction product with dimedone was compared with that of methylenebisdimedone. It was recognjzed that the both spectra were completly the same. These results show that formaldehyde may occur in C.S. during cultivation. The amount of formaldehyde determined by acetylacetone method was 100-200ppm in dried C.S. on the market, and 6-20ppm in raw one. The authors also investigated the distribution of folmaldehyde and changes in the amount in cultivating C.S. on the woods. These investigation indicated that folmaldehyde in C.S. keeps on increasing definitely at least for about three months after picking off.抄録全体を表示PDF形式でダウンロード (1349K) -
農薬の生体内分布と蓄積量の経時的変化大柴 恵一, 川北 兵蔵1970 年 11 巻 3 号 p. 177-182
発行日: 1970/06/05
公開日: 2010/02/22
ジャーナル フリー日本人の食生活内容を加味して, 生体内での有機塩素系農薬 (γ-BHC) の分布と臓器組織への蓄積量を経時的に測定した.
γ-BHC 100ppm摂取群の体重増加は5日目頃から対照群にくらべ徐々に劣りはじめ, 56日目で対照群の約1/2となった.
臓器の比体重百分率では肝臓が14日目頃から若干大きくなった. 他の臓器には異常が認められなかった.
γ-BHCは生体内の脂肪が存在するあらゆる組織に分布し, 蓄積していた. またγ-BHCの各組織への蓄積量を組織脂肪のg重量あたりで表わすと, ほとんどの組織が140～160μg/gの範囲内でほぼ一定であったが, 肝臓 (55μg/g) と脳 (65μg/g) がかなり低い値を示した.
γ-BHCの各組織への蓄積量を経時的に測定した結果, 3～7日間で平衡状態に達することがわかった.抄録全体を表示PDF形式でダウンロード (801K) -
かん詰開かん後のスズ溶出量について岩本 喜伴, 前田 誘子, 堀尾 嘉友1970 年 11 巻 3 号 p. 183-187
発行日: 1970/06/05
公開日: 2010/02/22
ジャーナル フリーIt is known that corrosion of inner tin-plate surface of can is greatly accelerated under (oxygen) atmosphere. The present study deals with the attitude of tin-dissolving in canned acid products after opening.
Canned drinks and fruits were opened and allowed to stand either at room temperature or in a refrigerator. The products were then subjected to the analysis of tin after appropriate storage periods.
(1) Tin-dissolving proceeds rapidly after opening of the canned products in uncoated cans regardless of the storage temperature. After storage for 3-6 hrs. tin content in orange drink, pineapple drink and mandarin orange in syrup was approximately 2 times than when opened. Tin content reached this level 24-48 hrs. after opening canned nectars, peaches or cherries in syrup in which corrosion is believed to proceed slower (Table 1 and 2).
(2) When the canned foods are kept under the same (oxygen) atmosphere, the extent of the corrosion at the product level edge was found to be significantly different depending on the contents.
(3) Caution must be paid on the storage after opening canned products contained in uncoated cans, especially those in uncoated smaller cans.
(4) No appreciable increase of tin content is observed in canned products contained in enameled cans.抄録全体を表示PDF形式でダウンロード (867K)
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