本論文は第3報に続いて, 接種源の接種深度, 灌水, 土壌殺菌, 指標植物の種類が防除効果におよぼす影響について調査し, 殺菌剤の鉢試験法の実施条件を検討し, その方法を確立した.
接種源の接種深度は0cmすなわち表面接種において2.5cm接種より防除効果は低い. 接種操作の簡単なこと, 病原性の強いことから表面接種が適当である.
1鉢当たりの施用有効成分量を同一にし, 液量を変えた場合に効果には大差がみられず, 効果は有効成分量の多少に大きく支配される.
薬剤灌注前の土壌への灌水と無灌水の防除効果を比較するとその差はほとんどない. 径12cmの鉢に50m1の薬液灌注を土壌表層に均一に施すことは困難であるが, 灌水処理によって実施が容易となる.
無殺菌土壌は殺菌土壌に比べ効果は高いが, 目的以外の病原菌による不時の病害発生を考慮した場合, 殺菌土壌を使用すればその危険もなく有利と考えられる.
指標植物の種類によって効果は異なり, 罹病性の高い植物では低い傾向がある. また効果の高い薬剤はいずれの植物でも効果は高く評価される. このことから薬剤検定はそれぞれの防除を対象とする作物を指標植物として用い, 効果を判定する必要がある.

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Coloured crystals of quartz of gemstone-grade, citrine, amethyst and blue quartz, have been synthesized under hydrothermal conditions ranging 320-330°C and 1000-1500kg/cm². Conditions for colourations were Fe impurity, K₂CO₃ mineralizer, Ag-lined autoclave for citrine and amethyst, and Co and Al impurities, NaOH mineralizer for blue quartz. These impurities were added in the forms of metals or metallic oxides. Gamma irradiation was necessary for the final colouration of amethyst. Infrared examinations of natural and synthetic quartz crystals were made in the spectral range 2000-4000 cm^-1.

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This paper reports shear rate dependence of the viscosity and relative viscosity of highly concentrated non-aqueous and aqueous slurries used for tape casting of the alumina sheet by a doctor blade method.The non-aqueous and aqueous slurries containing 28-35 vol% and 24-29 vol%alumina, respectively, were prepared by ball milling for this work.Approximate equations, derived from the Dougherty-Krieger-equation, logη_r,=αφand logη_r=αφ+(α/2φ_m)φ², are both fitted to the data measured quite well.

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Alumina compounds with 20-40vol% powder concentrations in two mixture systems of organic binders were prepared to discuss their flow properties and feasibility for injection molding. The selected mixture systems (A) and (B) had the bonding resin/plasticizer/lubricant content ratio of 85/10/5 and 65/20/15, respectively. The results obtained were as follows:
All compounds showed a non-Newtonian flow and the type of flow could be characterized as shear thinning. Mixture system (A) flowed likely as a Bingham body, but (B) flowed as a pseudo-plastic body. The relation between apparent viscosity and powder concentration was well fit to Farris's Eq., and the inherent viscosity calculated was 8.3Pa·s for (A) and 1.1Pa·s for (B) at 165°C.
Mold inner pressure patterns during injection molding differed largely in two mixture systems (A, B). In the mixture system (A) the mold inner pressure less transmitted from the injection pressure, and the filling time was slower than in the mixture system (B).
Internal cracks appeared at the dewaxing stage, and their shape and size were influenced by the composition of organic binders.

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As a fundamental study on a heat transport system utilizing a magnetic fluid two-phase flow, forced convective boiling heat transfer of water-solvent magnetic fluid with magnetite particles of 29.9 wt% was investigated experimentally in a thin tube 4.01 mm in diameter under a magnetic field with constant gradient of 3.85×10⁶ A/m². When a region downstream from the point of maximum magnetic field strength was heated, the boiling heat transfer was reduced by the application of a magnetic field. When a upstream region was heated, the boiling heat transfer was reduced and wall temperature fluctuated by the field.

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前報でのべたように,ごま葉枯病感染初期のイネ葉中にはDEAE-celluloseカラムを用いトリス緩衝液でイネ蛋白を溶離すると0.5Mおよび1.0Mフラクションが増加する。本報ではこれら増加蛋白フラクションの生化学的性質を調べるとともにごま葉枯病罹病組織における代謝生理との関係を解明しようとした。
(1) 溶離蛋白フラクションの抗菌性を検討した結果,ごま葉枯病菌の胞子発芽阻害および発芽管の伸長抑制作用は全く認められなかつた。
(2) 0.5Mと1.0Mのトリス緩衝液で溶離した接種葉中の蛋白フラクションにはカタラーゼ活性が認められたが,健全葉では0.5Mフラクション以外にはその活性が認められなかつた。0.5MフラクションにはFe⁺⁺, Fe⁺⁺⁺反応を検出しなかつたので鉄酵素以外の酸化酵素を含むものと考えた。また,β-アミラーゼ活性は全く認められなかつたが,接種葉0.5Mおよび1.0Mフラクションにはその活性を阻害する蛋白のあることが明らかになつた。したがつて,接種葉において増加する蛋白の一部にはβ-アミラーゼ活性の阻害作用をもつものと考えられ,それがでん粉の分解移行を妨げ,病斑周縁部にでん粉蓄積を来たす一因となるものと推定した
(3) 0.5M蛋白フラクションのアミノ酸組成をアミノ酸自動分析機で調べたところ,接種葉の蛋白にはglutamic acidの量が少なく,aspartic acidの量が多い。

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A new thermosyphon for the use in the non-gravity field has been proposed by using a magnetic fluid as a working fluid. The heat transport of the thermosyphon is driven by a magnetic force instead of the gravity force. In order to avoid too much concentration of the magnetic fluid in a heating region, a liquid bypass line is installed between a heating region and a cooling region so that the highly concentrated magnetic fluid flows from the heating region to the cooling region. The perforance of the thermosyphon has been evaluated based on an analytical estimate of total pressure rise and loss through the magnetic fluid loop. Under the conditions of system pressure 0.02 MPa and the fluid temperature 60°C, it has been confirmed that the thermosyphon with the working fluid of a water-base magnetic fluid has the heat transport capacity of 100 W with the circulation force of 3500 Pa.

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We discussed the stability against disturbances of liquid lithium flows for the target and coolant of BNCT (Boron 4eutron Capture Therapy) using accelerators, which makes cancers and tumors curable with cell-level selections. The )bject of our research is the thin and high-speed plane sheet jet / film flow (on a guide plate) of liquid lithium in a sighvacuum because of the ambience using accelerators, and it serves both as a target of accelerators and as a coolant or the target itself. In this paper, we made the linear stability analysis suitable to the physical features of thin plane ,heet jets of liquid lithium in a high-vacuum. As the results, we proved that the anti-symmetric sinusoidal wave has no lispersion and the symmetric dilatational wave has a strong dispersion in which the very slow phase velocity is )roportional to the wave number, when the thickness of a plane sheet jet of liquid lithium is sufficiently thinner than the vave length.

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The equation of tensile strength proposed by Rumpf was extended to deal with the compacted power bed composed of granules. It was assumed that the cohesive force between granules in a compact body is proportional to the contact area brought about by the contact force. Then the tensile strength of such a granules-bed can be determined by estimating the contact force between granules in the bed. The extended equation shows how the tensile strength depends on the compaction force, the porosity and the granule size.
The equation sufficiently explains the results obtained from the tensile strength test of compacts. The compression test of a single granule was also performed to confirm the relationship between tensile strength characteristics of compact and deformability of granule. Parameter m, one of the two parameters in both equations for the tensile strength of compact and compressive deformation of granule, has almost the same value in both tests as expected. However, the other parameter b is larger in the tensile strength test than in the compression test of a single granule. This discrepancy should be further investigated.

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P. zingiberumによるショウガ根茎の腐敗は,およそ20℃から37℃の間で甚しく, 40℃でも腐敗する。20℃より温度が下がるにしたがい,腐敗の進行は明らかに鈍るが, 13～15℃でも緩慢ながら腐敗が進む。腐敗のおこる温度の下限は9～8℃付近にあると思われるが,この温度は,生理的にみた貯蔵の最低限界温度と近接しており,貯蔵前に罹病根茎による菌の持ち込みがある場合,貯蔵中の大きな被害につながり得ることを示している。キュアリング処理によって貯蔵性が高まるが,この場合にもPythium菌による腐敗が短時間に進行することを考えれば,罹病根茎の持ち込みがある限り,必ずしも安全とは言えない。したがってPythium菌によるショウガの被害を防止するためには,貯蔵中のみならず,無病種の確保,作付ほ場の選定,ほ場管理,薬剤防除など総合的な対策によって,産地の浄化をはかっていかねばならない。

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The effect of concentration of binder on dividing of scored tablets was investigated in scored tablets compressed the granules of 12-16, 16-32 and 32-48 mesh used hydroxypropylcellulose (HPC) and potato starch as binder.We obtained the following result in each binder.
1) Dividing strength of scored tablets compressed by each particle size increased with concentration of binder in each compaction force.2) In case of the scored tablets made from granules of 12-16 and 16-32 mesh, coefficient of weight variation of tablet halves decreased with increasing concentration of binder in low compaction force.But the influence of concentration of binder decreased when the compaction force increased.3) The scored tablets made from granules of 32-48 mesh was not affected by concentration of binder in the compaction force of this experiment.

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