巻号一覧
1993 巻 (1993)
- 38 号 p. 1-
- 37 号 p. 1-
1993 巻, 38 号
選択された号の論文の5件中1～5を表示しています
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濱崎 敞1993 年 1993 巻 38 号 p. 1-3
発行日: 1993/12/31
公開日: 2009/08/04
ジャーナル フリーPDF形式でダウンロード (187K) -
常田 昭彦1993 年 1993 巻 38 号 p. 5-9
発行日: 1993/12/31
公開日: 2009/08/04
ジャーナル フリーBoth Lentinula edodes (black oak mushroom or Shiitake in Japanese) and Pleurotus ostyeatus (oyster mushroom or Hiratake) belong to the class Hymenomycetes (Basidiomycotina), and are important commercial mushrooms in Japan. In nature, these fungi inhabit dead broad-leaved trees, and they interact with various kinds of microorganisms in wood. However, little is known about the precise nature of the majority of such interactions. These fungi cause white rot of wood by first removing lignin and other amorphous wood components, followed by the degradation of exposed cellulose microfibrils. Wood is a unique substrate for microorganisms because it contains exceptionally large amounts of cellulose, hemicellulose and lignin, while water-soluble and solvent-soluble (e.g. fats, oils, waxes) and proteins occur relatively in small quantities. Therefore, wood in general is strongly deficient in nitrogen, containing less than 0.3% (w/w). Mechanisms by which wood-decay fungi manage to decay nitrogen-deficient wood are not well known.抄録全体を表示PDF形式でダウンロード (524K) -
伊藤 恵美子, 大楠 美佐子, 寺尾 清1993 年 1993 巻 38 号 p. 11-18
発行日: 1993/12/31
公開日: 2009/08/04
ジャーナル フリーHistopathological changes of mouse digestive tracts induced by trichothecenes were examined lightand scanning electron microscopically. Using ICR mice, acute responses up to 48 hr of the digestive tracts to the mycotoxins were demonstrated. A single dose of T-2 toxin (T-2), f usarenon-X (FX), nivalenol (NIV) and deoxynivalenol (DON) at a dose of 15.6, 10.2, 12.3 and 46 mg/kg b.w., respectively, were incubated to 4-week-old male ICR mice. In the stomach, FX caused a marked dilatation within 48 hr, while the other mycotoxins did not. Histologically, exfoliation ofepithelial cells and bacterial growth on the surface of tissue defects were seen in the glandular stomach of mice treated with T-2 and FX. FX caused necrosis and shortening of gland cells, cell infiltration in submucosa, and thinning of muscle layer most severely among the mycotoxins tested.In contrast, DON or NIV caused ulcer and cell infiltration preferentially in forestomach. In the small intestine were noted 4 processes, i.e. 1) necrosis of crypt immature cells, 2) cell infiltration in mucosa, 3) cystic change of crypt and 4) abnormal arrangement of regenerating villi. The processes 1) and 2) occurred in the treatment with FX, T-2 or DON and the processes 3) and 4) were noted only in the treatment with FX.抄録全体を表示PDF形式でダウンロード (6420K) -
川村 廣美, 北川 章, 河合 清, 森 悟, 野澤 義則1993 年 1993 巻 38 号 p. 19-24
発行日: 1993/12/31
公開日: 2009/08/04
ジャーナル フリーChaetochromin A, a bis(naphtho-γ-pyrone) mycotoxin from Chaetomium gracile, was spectrophotometrically examined for its interactions with bovine serum albumin (BSA) and magnesium ion to gain insight into the molecular mechanism for its toxic action on mitochondria. It was found that chaetochromin A bound to anion binding site(s) of serum albumin by the electrostatic and hydrophobic interactions. Chaetochromin A showed a spectral alteration in the presence of magnesium ion, indicating a complex formation between them.抄録全体を表示PDF形式でダウンロード (519K) -
仲村 賢一, 泉山 七生貴, 大坪 浩一郎, 小磯 邦子, 岩崎 成夫1993 年 1993 巻 38 号 p. 25-30
発行日: 1993/12/31
公開日: 2009/08/04
ジャーナル フリー稲こうじ病の原囚菌であるしなUstilaginoidea virens寄生稲こうじ粒からの粗抽出物U-3,およびU-3より単離したustiloxin Aのマウスに対する急性毒性試験では,肝および腎尿細管上皮細胞の変性・壊死および前胃に潰瘍が生じることをすでに報告した.その後,光顕および電顕標本を再検討したところ,肝および腎尿細管上皮,膀胱移行上皮細胞での単細胞死は,apoptosisによるものであることが明らかとなった.抄録全体を表示PDF形式でダウンロード (7050K)
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