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Studies on Piericidin 皮尔西丁的研究
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1970.10859740
T. Mitsui, J. Fukami, K. Fukunaga, N. Takahashi, S. Tamura
Respiratory inhibition by piericidin A was overcome by addition of vitamin K3 to the inhibited respiratory chain in mammalian mitochondria but not in insect mitochondria.Antagonistic effect of vitamin K3 on the inhibition of piericidin A was apparently found in respiration, blood pressure and heart rate in rat in vivo. Furthermore, toxicity of piericidin A to mouse and rat decreased when piericidin A was administered as the mixture of vitamin K3 in intraperitoneal route.No antagonistic effect of vitamin K3 was observed on the inhibition of piericidin A in TTC reaction of american cockroach nerve cord, femorals and digestive organs. Toxicity of piericidin A to some insects were not affected by vitamin K3.
在哺乳动物线粒体中,在被抑制的呼吸链中添加维生素K3可以克服皮利西丁A的呼吸抑制作用,而在昆虫线粒体中则不能。维生素K3在体内对大鼠的呼吸、血压和心率有明显的拮抗作用。此外,与维生素K3混合经腹腔给药后,吡嘧菌素A对小鼠和大鼠的毒性降低。维生素K3对piicidin A对美洲蜚蠊神经索、股骨和消化器官TTC反应的抑制作用无拮抗作用。对部分昆虫的毒力不受维生素K3的影响。
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引用次数: 3
Liquid Chromatography of Aflatoxins 黄曲霉毒素的液相色谱分析
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1971.10859920
M. Manabe, S. Matsuura
There are numerous reports on studies of aflatoxins, but there are only a few reports on the isolation and mutual separation of aflatoxins by liquid chromatography. Following the previous reports on the liquid chromatography of four kinds (B1, B2, G1 and G2) of aflatoxins, the authors carried out the chromatography of six kinds of aflatoxins including aflatoxins B2a and G2a. Various kinds of adsorbents and eluting solvents were examined, and then the good mutual separation of aflatoxins was obtained by using the Sephadex G-10 (CM), a newly prepared adsorbent containing carboxymethyl group, and pure water for eluting solvent. Aflatoxins G2a, B2a, G2, B2, G1 and B1 were eluted in this order.
关于黄曲霉毒素的研究报道很多,但利用液相色谱法分离黄曲霉毒素的报道很少。在前人对4种黄曲霉毒素(B1、B2、G1、G2)的液相色谱分析报道的基础上,本文对黄曲霉毒素B2a、G2a等6种黄曲霉毒素进行了液相色谱分析。考察了各种吸附剂和洗脱溶剂,采用新制备的含羧甲基吸附剂Sephadex G-10 (CM)和纯水作为洗脱溶剂,获得了良好的黄曲霉毒素相互分离效果。依次洗脱黄曲霉毒素G2a、B2a、G2、B2、G1和B1。
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引用次数: 0
Non-foaming Mutants of Sake Yeasts 清酒酵母的非发泡突变体
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1971.10860043
K. Ouchi, H. Akiyama
Two selection methods of non-foaming mutants of sake yeasts (a kind of cell wall mutants lacking the ability to form froth head in sake mash) are described. The mutants, being different in both the affinity to gas bubble and in the agglutinability from the parent, were concentrated, by removing the wild type cells with froth in froth flotation method and by removing them by agglutination caused by lactobacillus cells in cell agglutination method. Spontaneous non-foaming mutants of Kyokai No. 7 strain were isolated from the concentrates after 9 successive trials of each selection procedure at the rates of 50% by the former and 81% by the latter. The UV-induced mutants were also isolated from the concentrates after the 7 successions at the rates of 80% and 100%, respectively, by the former and by the latter. There were two types among the non-foaming mutants with respect to the agglutinability; the one was non- or almost non-agglutinable type (type 1) and the other was weakly-agglutinable one (type 2). The ...
介绍了清酵母无泡沫突变体(一种在清醪中缺乏泡沫头形成能力的细胞壁突变体)的两种选择方法。用泡沫浮选法去除带有泡沫的野生型细胞,用细胞凝集法去除由乳酸菌细胞引起的凝集,对具有不同气泡亲和力和亲本凝集性的突变体进行浓缩。每种选择程序连续9次,分别以50%和81%的筛选率从浓缩物中分离出Kyokai 7号菌株的自发无发泡突变体。紫外诱导突变体的分离率为80%,紫外诱导突变体的分离率为100%。在凝集性方面,非发泡突变体有两种类型;一种为非或几乎不粘合型(1型),另一种为弱粘合型(2型)。
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引用次数: 6
Studies of the Peptide Antibiotic Suzukacillin 肽抗生素苏卡西林的研究
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1972.10860219
T. Ooka, I. Takeda
Suzukacillin produced by Trichoderma viride 63Cl strain was purified and shown to be separated into two components A and B on thin-layer chromatography. The component A was isolated and crystallized from the mixture of components by alumina column chromatography. The component A is composed of six amino acids, Gly, Glu, Ala, Pro, Val, Leu and an unknown amino acid. This unknown amino acid was identified as α-amino isobutyric acid. It is supposed that α-amino isobutyric acid is biosynthesized mainly from l-valine by the isotopic experiments. Suzukacillin formation by Trichoderma viride 63Cl was stimulated by the addition of l-Asn, GABA, l-Ser, Gly and l-Arg into the medium.
对绿木霉63Cl菌株产的铃卡西林进行了纯化,薄层色谱法将其分离为A、B两组分。用氧化铝柱层析法从混合物中分离得到组分A。组分A由6种氨基酸组成,分别是Gly、Glu、Ala、Pro、Val、Leu和一种未知氨基酸。该未知氨基酸经鉴定为α-氨基异丁酸。通过同位素实验推测α-氨基异丁酸主要由l-缬氨酸生物合成。在培养基中加入l-Asn、GABA、l-Ser、Gly和l-Arg,可促进绿木霉63Cl生成铃卡西林。
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引用次数: 0
Studies on Colicin B 粘菌素B的研究
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1968.10859043
K. Arima, Yoshiki Katoh, T. Beppu
The formation and the bactericidal action of colicin B, which had not been studied, were examined. When colicin B-producing cells were incubated with a low concentration of EDTA in water at 37°C for 30 min, almost all of colicins were extracted from cells into the surrounding medium. This technique was extremely effective for colicin I, which was not excreted into medium under usual conditions.Colicin B inhibited many macromolecular functions in the sensitive E. coli cells simultaneously, i.e., O2 uptake, oxidative phosphorylation, permeation activity for o-nitro-phenyl β-galactoside (ONPG) through cell membrane, and syntheses of protein, RNA and DNA.Colicin B could not be distinguished from colicin K by the cross-immunity test using K-colicinogenic strains. Colicin B had also many resemblances in the mode of action to colicine K, although their action was observed to be different in some points. These results indicated close relationship between colicins B and K.
对未被研究过的大肠杆菌素B的形成和杀菌作用进行了研究。当产生大肠杆菌素b的细胞与低浓度EDTA在37°C水中孵育30分钟时,几乎所有的大肠杆菌素都从细胞中提取到周围的培养基中。该技术对大肠杆菌素I非常有效,在通常条件下大肠杆菌素不会排泄到培养基中。Colicin B同时抑制敏感大肠杆菌细胞的多种大分子功能,如O2摄取、氧化磷酸化、对邻硝基苯基β-半乳糖苷(ONPG)通过细胞膜的渗透活性以及蛋白质、RNA和DNA的合成。用K-大肠杆菌原菌株进行交叉免疫试验,不能区分大肠杆菌素B和大肠杆菌素K。Colicin B在作用方式上与Colicin K也有许多相似之处,尽管它们的作用在某些点上有所不同。这些结果表明,大肠杆菌B与K有密切的关系。
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引用次数: 1
Ruminal Fermentation and Sugar Concentrations 瘤胃发酵与糖浓度
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1968.10859234
F. Hishinuma, S. Kanegasaki, H. Takahashi
The maximal amounts of growth of Selenomonas ruminantium were examined in the media containing various amounts of glucose. The yields of cells per unit weight of glucose are linear functions to glucose concentrations in the ranges between zero to 0.005% and 0.005 to 0.7%, Cell yields per glucose are greater in the former range, indicating greater a-mounts of energy are available per glucose at lower concentrations. Growth responses in lactate media containing various amounts of glucose showed that the preincubation with larger amounts of glucose is inhibitory for the following growth and metabolism of lactate. The organism produces predominantly lactate in the glucose medium. However, volatile fatty acid productions increase when the initial concentrations of glucose become low. Isotopic studies showed that the lactate utilization yielding volatile fatty acids is inhibited by the preceding metabolism of high concentrations of glucose. These results were discussed with regard to normal and abnormal ferment...
研究了反刍硒单胞菌在不同葡萄糖含量培养基中的最大生长量。单位重量葡萄糖的细胞产量与葡萄糖浓度在0 ~ 0.005%和0.005 ~ 0.7%的范围内呈线性关系。在前一个范围内,细胞每葡萄糖产量较大,表明在较低浓度下,每葡萄糖可获得更多的能量。在不同葡萄糖含量的乳酸培养基中的生长反应表明,较大葡萄糖含量的预孵育对乳酸的后续生长和代谢有抑制作用。这种生物在葡萄糖培养基中主要产生乳酸。然而,当葡萄糖的初始浓度变低时,挥发性脂肪酸的产量增加。同位素研究表明,产生挥发性脂肪酸的乳酸利用被先前高浓度葡萄糖的代谢所抑制。这些结果在正常和异常发酵条件下进行了讨论。
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引用次数: 2
Prodigiosin-25 C
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1966.10858598
Keiji Harashima, Nobuo Tsuchida, Junsaku Nagatsu
A water-insoluble red antibiotic pigment was isolated from mycelia of a strain of Streptomyces. It was found that the pigment is a new C25-prodigiosin-analogue and the authors propose to designate it prodigiosin-25 C. The chemical structure (XI) has been deduced from visible absorption spectra, NMR spectra, mass spectra and analysis of degradation products of the pigment.
从一株链霉菌菌丝中分离出一种不溶于水的红色抗菌素。
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引用次数: 0
Anthocyanase and Anthocyanin Occurring in Eggplant (Solanum Melangena L.) 茄子中的花青素酶和花青素
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1965.10858372
S. Sakamura, Susumu Watanabe, Y. Obata
Experiments on anthocyanase and anthocyanin in eggplant were carried out by means of Warburg’s manometric method and determination of the anthocyanin. Results show that delphinidin 3-(p-coumaroylrutinoside)-5-glucoside from eggplant is oxidized by the polyphenol oxidase from mushroom, potato and eggplant flesh. The oxidative degradation of the anthocyanin is accelerated in the presence of chlorogenic acid which occurs in eggplant, and a mode of the action stimulating the degradation was discussed.In addition, an evidence was given that the existence of ascrobic acid in the enzymatic system retards the loss of the pigment, due to a coupled reaction, which is of well-known on the other o-dihydroxy phenols. Some observations on the product from the reaction mixture indicate that such decolorization of the anthocyanin progresses directly without hydrolysis of the glucosidic linkage.
采用华氏压力法和花青素测定法对茄子中花青素酶和花青素进行了测定。结果表明,蘑菇、马铃薯和茄子果肉中的多酚氧化酶均能氧化茄子中的飞鸽苷3-(对香豆素芦丁苷)-5-葡萄糖苷。绿原酸的存在加速了茄子花青素的氧化降解,并探讨了促进降解的作用模式。此外,还证明了抗坏血酸在酶系统中的存在,由于偶联反应而延缓了色素的损失,这是其他邻二羟基酚所熟知的。对反应混合物产物的一些观察表明,花青素的这种脱色过程直接进行,而不水解糖苷键。
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引用次数: 1
Studies on the Water-Insoluble Enzyme 水不溶酶的研究
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1966.10858683
Hideo Suzuki, Y. Ozawa, H. Maeda
Water-insoluble yeast invertase was prepared by binding native invertase to DEAE-cellulose. Some characteristics of the bound invertase and the continuous hydrolysis of sucrose by use of it are described. The activity of bound invertase corresponded to about 1/2 at pH 3.4 when compared with the maximum activity of free form and it could hydrolyze sucrose into invert sugar perfectly. The apparent optimum pH of bound invertase was shifted toward acid pH by about 2 pH units in comparison with free invertase. Stability of bound invertase to temperature was slightly less in comparison with free invertase at pH 5.2. The continuous sucrose hydrolysis was carried out using bound invertase at pH 3.6 and it could be used about ten times until the hydrolysis ratio decreased to the half of the initial.
将天然转化酶与deae纤维素结合制备了不溶于水的酵母转化酶。介绍了结合型转化酶的一些特性以及利用它连续水解蔗糖的方法。在pH 3.4条件下,结合型转化酶的活性约为游离型酶的最大活性的1/2,能很好地将蔗糖水解成转化糖。与游离转化酶相比,结合转化酶的表观最佳pH向酸性pH偏移约2个pH单位。在pH 5.2时,结合型转化酶对温度的稳定性略低于游离型转化酶。在pH为3.6的条件下,用结合的转化酶进行连续的蔗糖水解,可以使用10次左右,直到水解比降低到初始的一半。
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引用次数: 4
Denaturation of Soybean Protein by Freezing 大豆蛋白的冷冻变性研究
Pub Date : 2014-09-09 DOI: 10.1080/00021369.1971.10859957
K. Hashizume, K. Kakiuchi, E. Koyama, Tokuji Watanabe
When a solution of soybean acid-precipitated or 11S protein was frozen and stored at −1 to −5°C, the protein became partially insoluble after thawing. Ultracentrifugation and disc-electrophoresis of freeze-stored 11S protein solution after removing insoluble components revealed that new components which may be aggregates or associates of the 11S component were formed. When concentrated and stored at 5°C, disc-electrophoresis of 11S component showed that associates were formed. Mercaptoethanol could dissolve the insoluble protein and also convert the associates to the original 11S component. NEM–11S was not insolubilized by frozen storage at −5°C or storage at 5°C after being concentrated. From these facts it can be concluded that denaturation of soybean protein by freezing may be caused by intermolecular reactions through S-S bonds as a result of concentration by freezing. This may suggest a mechanism of the formation of sponge-like texture in kori-tofu which is made by frozen storage of soybean curd for ...
将大豆酸沉淀蛋白或11S蛋白溶液冷冻保存在- 1 ~ - 5℃,解冻后蛋白质部分不溶。对11S蛋白冻存液进行超离心和圆盘电泳,去除不溶性组分后,发现形成了新的组分,可能是11S组分的聚集体或伴生物。在5℃下浓缩保存,11S组分圆盘电泳显示形成了缔合物。巯基乙醇可以溶解不溶性蛋白质,并将其结合物转化为原始的11S组分。NEM-11S在- 5°C冷冻或浓缩后在5°C保存均不溶出。由此可以得出结论,大豆蛋白的冷冻变性可能是由于冷冻浓缩引起的S-S键分子间反应引起的。这可能是一种海绵状结构的形成机制。
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引用次数: 4
期刊
Agricultural and biological chemistry
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