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Soil Science and Plant Nutrition | 1983

Oxygen partial pressure as affecting nitrogen fixing activity in warty tree barks

Michihiko Yatazawa; Gregori G. Hambali; Fuji Uchino

Oxygen partial pressure as affecting nitrogen-fixing activity of warty lenticellate tree barks was investigated with detached barks of Mallotus japonicus Lindl. and Ilex pedunculosa Miq. Fresh bark pieces were incubated under atmosphere containing 0.1 atm C2H2 and varied concentration of O2. ARA of the tissue and pO2 in the vessel atmosphere were measured concomitantly over the incubation period. Results showed that ARA of the tissues only developed when pO2 in the vessel atmosphere was below 0.06 atm. The opt. pO2 for full operation of ARA lay at 0.03–0.05 atm.


Bulletin of the Agricultural Chemical Society of Japan | 1959

Proteolytic Enzymes of Butyl Bacteria. Part III

Shinji Doi; Yasuyuki Kaneko; Fuji Uchino

アセトン・ブタノール菌,東大314号菌の生産する蛋白分解酵素と2個金属イオンとの関係につて試験して次の結果を得た. (1) 10-4MのEDTAによって殆んど完全に失活する.この失活は等モル量のCo++で完全に回復する. (2) EDTAと長時間,比較的高温に放置するとCo++を添加しても回復は小さくなるが,低温の場合には殆んど可逆的に活性は発現する. (3) EDTAに対し低温透析処理を行った結果,この失活はCo++, Mn++, Zn++, Fe++等で回復した.特にCo++及びMn++は有効である. (4)酵素液を放置する場合の失活に対してはMn++が保護作用を示し, EDTA処理酵素の失活防止には, Co++, Mn++, Zn++, Ca++等が有効である. (5)本実験より, EDTAによる失活は可逆的であり, EDTA処理酵素の変性(失活)は不可逆的に進行すると考えられる.


Agricultural and biological chemistry | 1981

A Thermostable Xylanase from a Thermophilic Acidophilic Bacillus sp.

Fuji Uchino; Toshihiko Nakane


Agricultural and biological chemistry | 1967

Acido-thermophilic Bacteria from Thermal Waters

Fuji Uchino; Shinji Doi


Agricultural and biological chemistry | 1982

A thermophilic and unusually acidophilic amylase produced by a thermophilic acidophilic Bacillus sp..

Fuji Uchino


Applied and Environmental Microbiology | 1984

Nitrogen-fixing bacteria from warty lenticellate bark of a mangrove tree Bruguiera gymnorrhiza (L.) Lamk.

Fuji Uchino; Gregori G. Hambali; Michihiko Yatazawa


Soil Science and Plant Nutrition | 1983

Nitrogen fixing activity in warty lenticellate tree barks

Michihiko Yatazawa; Gregori G. Hambali; Fuji Uchino


Agricultural and biological chemistry | 1983

Taxonomic Characteristics of a Thermophilic Acidophilic Strain of Bacillus Producing Thermophilic Acidophilic Amylase and Thermostable Xylanase

Fuji Uchino; Osamu Fukuda


Agricultural and biological chemistry | 1967

Purification and Some Properties of Crystalline Acid Protease from Acrocylindrium sp

Fuji Uchino; Yoshiaki Kurono; Shinji Doi


Agricultural and biological chemistry | 1975

The specificity of acid proteinase from Acrocylindrium.

Shigeyuki Ichihara; Fuji Uchino

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