[Poster Presentation] MECHANISMS OF RETENTION AND SIZING DEVELOPMENT IN ROSIN SOAP SIZING

K.Ohno,A.Isogai,F.Qnabe 한국펄프·종이공학회 1999 한국펄프종이학회 기타 간행물 Vol.- No.-

Sizing development and retention mechanism in rosin soap size-alum systems were studied. Rosin size and aluminum contents in hand sheets, which were prepared under various conditions, were determined by X-ray fluorescence analysis and pyrolysis-gas chromatography, respectively. ¹³C-labeled palmitic acid potassium salt was used as a model of rosin soap size, and chemical structures of size components in hand sheets were analyzed by solid-state ¹³C-NMR. The relationships among sizing degree, size retention and aluminum content in handsheets were obtained in terms of various handsheetconditions. Especially, most aluminum compounds originating from alum added to pulp suspensions are immediately adsorbed on pulp fibers and form cationic sites. Anionic rosin size components are then adsorbed on the cationic sites. When the ¹³C-labled palmitic acid soap size was used in handsheet-making, calcium palmitate was present as a major component in the handsheets. Molecules of free palmitic acid and aluminum palmitate were present as minor components. Formation of aluminum palmitate must be significant for size retention at the wet-end. However, it is not plausible that only aluminum palmitate molecules present in the handsheets as a quite minor component govern overall sizing performance. Molecules of calcium palmitate and free palmitic acid as well as aluminum palmitate probably behave as hydrophobic compounds in the handsheets, and contribute to sizing performance.

Biological Control-based IPM in Vegetable Greenhouses: Conservation and Augmentative Release

K. Ohno 한국응용곤충학회 2005 한국응용곤충학회 학술대회논문집 Vol.2005 No.05

THE SPIN REORIENTATION AND THE MAGNETIC ANISOTROPY IN R₂Fe17-xMxCy (R=Er, Tm, M=Al, Ga)

K.Ohno,T.Urakabe,M.Agata,T.Saito,K.Shinagawa,T.Tsushima 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.5

In order to consider the change of the magnetic anisotropy energy by the Al or Ga substitution for Fe, spin reorientation temperature T_(SR) and Curie temperature Tc in R₂Fe_(17-x)Mx, (R=Er, Tm, M=Al, Ga) have been studied both experimentally and theoretically. As a result, T_(SR) and Tc for R₂Fe_(17-x)Al_x, shift toward higher temperature side with x (0≤x≤2.0). The ΔTc, the difference of the Tc's between Er₂Fe_(17-x)Al_x, and Tm₂Fe_(17-x)Al_x, is always about 10 K independent of Al-content. But in the case of Ga substitution, the ΔTc increases with Ga-content ; especially, the ΔTc for x=2.0 is 43 K. This value of the ΔTc is not explained by only the difference of the de Gennes fator G between Er³+ and Tm³+, but it is thought that the values of J_(ErFe) and J_(TmFe) themselves are not equal. (J_(AB): the exchange interaction between A and B.)

Unloading stress disturbs muscle regeneration through perturbed recruitment and function of macrophages

Kohno, Shohei,Yamashita, Yui,Abe, Tomoki,Hirasaka, Katsuya,Oarada, Motoko,Ohno, Ayako,Teshima-Kondo, Shigetada,Higashibata, Akira,Choi, Inho,Mills, Edward M.,Okumura, Yuushi,Terao, Junji,Nikawa, Takes American Physiological Society 2012 environmental and exercise physiology Vol.112 No.10

<P>Skeletal muscle is one of the most sensitive tissues to mechanical loading, and unloading inhibits the regeneration potential of skeletal muscle after injury. This study was designed to elucidate the specific effects of unloading stress on the function of immunocytes during muscle regeneration after injury. We examined immunocyte infiltration and muscle regeneration in cardiotoxin (CTX)-injected soleus muscles of tail-suspended (TS) mice. In CTX-injected TS mice, the cross-sectional area of regenerating myofibers was smaller than that of weight-bearing (WB) mice, indicating that unloading delays muscle regeneration following CTX-induced skeletal muscle damage. Delayed infiltration of macrophages into the injured skeletal muscle was observed in CTX-injected TS mice. Neutrophils and macrophages in CTX-injected TS muscle were presented over a longer period at the injury sites compared with those in CTX-injected WB muscle. Disturbance of activation and differentiation of satellite cells was also observed in CTX-injected TS mice. Further analysis showed that the macrophages in soleus muscles were mainly Ly-6C-positive proinflammatory macrophages, with high expression of tumor necrosis factor-α and interleukin-1β, indicating that unloading causes preferential accumulation and persistence of proinflammatory macrophages in the injured muscle. The phagocytic and myotube formation properties of macrophages from CTX-injected TS skeletal muscle were suppressed compared with those from CTX-injected WB skeletal muscle. We concluded that the disturbed muscle regeneration under unloading is due to impaired macrophage function, inhibition of satellite cell activation, and their cooperation.</P>

Performance Based Fire Engineering in Japan

Kohno, Mamoru,Okazaki, Tomohito Council on Tall Building and Urban Habitat Korea 2013 International journal of high-rise buildings Vol.2 No.1

This paper explains the Japanese present situations relevant to the fire resistance performance. Performance-based fire provisions was introduced in 1998 for the first time when the Building Standard Law was amended. However, performance-based fire resistance design had been used since long before the official introduction of performance-based provisions. A Comprehensive Technology Development Project of Ministry of Construction from 1982 to 1986 established a technical basis for performance-based fire safety engineering in Japan. A system of calculation methods for fire resistance verification was prescribed in the Ministry Notification in 2000 utilizing the results of this project as a background. This method, referred to as the Fire Resistance Verification Method (FRVM), is the standard method to verify the fire resistance performance of principal building parts such as columns, beams, and walls of steel, concrete, or wood structured buildings. For tall buildings, however, more advanced method for performance verification is often necessary because new building materials or structural systems are often used for these buildings. An example project of tall building owned by a major newspaper company is presented in this paper. Advanced thermal deformation analysis is executed to secure the fire resistance of the building.

Estimation of Oil Quantity in Porous Bearing

kohno Hajime 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1

Porous bearings are lubricated the oil that is contained in porous metal. Then they are always used with no oil supply, because of that, widely used electric motors. But, if oil flow out less than the limit, troubles often happen. This report shows that attempt of estimating oil quantity in porous bearing by using calculation that based Reynols' equation and Darcy's law, aimed of developing long life bearing. And comparing with experimental and calculation result, we show possibility of estimating rest oil quantity in porous bearing at steadry state by calculation.

Powder Forging of Rapidly Solidified hi-Si Alloy with Back Pressure

Kohno, T.,Kawase, K.,Otsuki, M.,Morimoto, K. The Korean Powder Metallurgy Institute 1998 한국분말재료학회지 (KPMI) Vol.5 No.4

Powder forging with a back pressure was investigated for production of automobile and compressor parts made of a rapidly solidified Al-Si alloy powder. Disk-shaped green compacts made of a rapidly solidified Al-Si alloy powder were hot forged, and hubs were formed by loading back pressure on their top. The influences of the back pressure and die temperatures on forgeabiliy and properties of parts made of a rapidly solidified Al-Si alloy powder were examined. This method was also applied to the production of a scroll part. The results of these studies are summarized as follows : 1. A back pressure on the hub top is very effective for consolidation and preventing crack formation in the hub. 2. When a back pressure tess than 98 MPa is applied, the forging pressure increases by the same amount of the applied back pressure. With more than 98 MPa, the forging pressure increases further due to an increased friction at the hub side. 3. Die temperatures higher than approximately 670k are needed in order to consolidate well the hub top without cracks.

Dynamic Take Off - Accelerating Effects and the Feasibility of the Asian Expressway Network on China

KOHNO, Hirotada,HIGANO, Yoshiro,MATSUMURA, Yuji 한국지역사회개발학회 1994 地域社會開發硏究 Vol.19 No.2

We intend to construct a dynamic interregional input-output programming model in order to measure social economic effects of the Asian Expressway Network(AEN) on China and derive its investment criterion and do briefly feasibility study judging from the traffic volume derived. That is, the accelerating-system for carrying through the dynamic and interregional economic restructuring by adopting the opportunity cost principle such as 'competitive(domestic) import method' in the interregional substitutional selection of inputs is built into the model, by which the dynamic process of 'takeoff' of China will be derived. This model is not a mere dynamic multisector optimal growth model, but the one in which the computational algorithm for the simulation of traffic as signment on the network is built. By such a formulation, the demand for investment in every link in the transport route on the network of transport facilities can be, at length, derived endogenously and detailedly based on the opportunity cost principle. In Section 1, the characteristics of ultra-gigantic projects and the proposed AEN are described. In Section 2, the Characteristics of the measuring method adopted, i.e., economic effects-measuring model also are enumerated. Section 3 sets forth qualitatively the theoretical bases of dynamic multi-regions, cult-industries, multi-transport model facilities, programming model in order to measure the direct & indirect economic benefits and derive the takeoff-accelerating effects of the AEN on China, in which the inter regional input-output formulation slightly different from Moses model is developed, and the dynamical aspects constructed by both equations of 'demand-supply balance of the industrial capital' and 'capital formation' are explained. In Section 4, the only three basic data of partition of the China territory, industrial classification, and planning horizon are introduced corresponding to our specified concrete model of 12 regions, 5 periods, 9 industries, 5 transport facilities. Section 5 treats the premises, case setting for simulation analysis, and simulation results of optimum investment allocation by period to the links of the AEN are presented and analysed. in Section 5-4), the feasibility study is done based on the traffic volume derived, referring to the actual traffic results of the Japan Highway Public Corporation. In the final Section 6, the concluding comments as to the acceleration effect in taking off of the Chian economy brought about by the AEN are shown, and the optimum trajectories by simulation-case are analysed.

Intestinal Microbiota and the Development of Allergy in Infants

( Yoichi Kohno ),( Shuichi Suzuki ),( Eduardo Campos ),( Naoki Shimojo ) 대한천식알레르기학회 2007 천식 및 알레르기 Vol.27 No.4

We analyzed fecal microbiota in Japanese infants with or without allergy at 6 months using a culture technique. Determination of allergy was based on clinical symptoms, signs, and skin prick test. There were no differences in frequencies or counts of 13 genera and yeast-like organisms at 6 months of age between allergic and non-allergic infants. Bifidobacterium was dominant in all infants irrespective of the presence or absence of allergy. We next investigated the composition of fecal Bifidobacterium species in allergic and non-allergic infants using Bifidobacterium species-specific or group- specific primers based on 16S rDNA sequences at 1, 3 and 6 months of age. At 1 month of age, allergic infants had a higher prevalence of B. catenulatum than non-allergic infants (60.0% vs. 6.3%, P<0.01). At 6 months of age, allergic infants had a higher prevalence of B. bifidum than non-allergic infants (70.0% vs. 12.5%, P<0.01). These differences were not related to feeding methods. Finally, we studied the activity of B. bifidum in comparison with B. adolescentis to induce TNF-α and IL-10 from cord blood mononuclear cells. The results suggest B. bifidum has lower activity to induce both cytokines compared to B. adolescentis, suggesting that colonization of lower cytokine producing Bifidobacterium species or strains may be a risk factor for the development of allergy in infancy. (Korean J Asthma Allergy Clin Immunol 2007;27:220-225)

Powder Metallurgy in Japan

Tohru Kohno 대한금속재료학회 ( 구 대한금속학회 ) 1992 분말야금 Vol.4 No.-