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BSE situation and establishment of Food Safety Commission in Japan
Takashi Onodera, Chi-Kyeong Kim 대한수의학회 Journal of Veterinary Science 11 Pages
대한수의학회 Journal of Veterinary Science 2006, 제 7권 제 1호 1 1-11 (11 pages)
on all cattle for human consumption Oct. 2001 Domestic surveillance strengthened Dec. 2001 Import of powdered animal fat prohibited from all countries Jan. 2002 Use of ruminant animal fat with impurity over 0.02% for milk replacer prohibited ..PAGE:3 BSE situation in Japan 3 on 24 August. The same brain sample was sent to the NIAH on 6 September for histopathological examination with the same... Eight major policies were implemented by Japanese Government since Oct.2001, to deal with bovine spongiform encephalopathy (BSE).These are;1)Surveillance in farm by veterinarian, 2)Prion test at healthy 1.3mi cows/yr, by veterinarian, 3)Elimination of specified risk material (SRM), 4)Ban of MBM for production, sale use, 5)Prion test for fallen stocks, 6)Transparent information and traceability, 7)New Measures such as Food Safety Basic Law, and 8)Establish of Food Safety Commission in the Cabinet... -
Immunochemical Studies for the Characterization of Purified(Na+, K+)-ATPase and Its Subunits with a Special Reference of Their Effect on Monovalent Cation Transport in Reconstituted (Na+, K+)-ATPase Vesicles
Rhee H.M., Hokin, L.E. 대한약리학회 대한약리학잡지 16 Pages
대한약리학회 대한약리학잡지 1990, 제 26권 제 1호 5 35-50 (16 pages)
activity of the (Na+, K)-ATPase containing vesicular system. This system contains (Na, K)-A TPase and phospholipid solubilized in cholate with minimal contaminants of other impurity (Hilden et al., 1974). In this active transport system, the inhibitory effect of antibodies on (Na+, K)- ATPase molecules incorporated into phospholipid vesicles could be related to the inhibition of... A highly purified (Na+, K+)-ATPase from the rectal gland of Squalus acanthias and from the electric organ of Electrophorus electricus has been used to raise antibodies in rabbits. The 97,000 dalton catalytic subunit and glycoprotein derived from the rectal gland of spiny shark were also used as antigens. The two (Na+, K+)-ATPase holoenzymes and the two shark subunits were antigenic. In Ouchterlony double diffusion experiments, these antibodies formed precipitation bands with their antigens.... -
Impact of single metal oxide and coal ash on secondary ultrafine particle generation through SO2 and NO2 heterogeneous reaction
Ru-Jiao Song, Zi-Xiang Xu, Joo-Chang Park, Li-Hua Xu, Hyung-Taek Kim 한국열환경공학회 열환경공학 19 Pages
한국열환경공학회 열환경공학 2020, 제 15권 1호 4 28-46 (19 pages)
system was flushed with N2 or air for 30 min, to remove the impurity gases in the reactor, in order to avoid impurities effect on the experimental results. Thereafter, the introduced gases, such as SO2, NO2, and NH3, were uniformly mixed in mixing bottle, and then entered the reactor, and started the reaction with UV irradiation at room temperature. The end of the reactor was connected to... Particulate matter research is of great significance in solving atmospheric environment problems. The heterogeneous reaction of mixed gas on different mineral oxides and coal ash was studied based on a laboratory-built aerosol generating reactor. The product formed on particles was investigated by ion chromatography (IC). SO2 and NO2 could react on oxides to form secondary particles and the order of reactivity of mineral oxides under laboratory reaction conditions is: Al2O3>MgO>CaO>>SiO2, Fe2O3.... -
Effect of added mesophase pitch during the pitch synthesis reaction of PFO
Ji Hong Kim, Jong Gu Kim, Chul Wee Lee, Ki Bong Lee, Ji Sun Im 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.23 7 48-54 (7 pages)
their crystallinity and their impurity content, which are affected by the characteristics of precursors [5,6]. Carbon materials are manufactured through an intermediate product called pitch; thus, controlling the properties of pitch is im- portant for improving the performance of carbon materials. Pitch is manufactured by the thermal reaction of feedstocks such as coal-tar or petroleum residue... This research considers the effect of added mesophase pitch (MP) as an additive during the pitch synthesis reaction of pyrolyzed fuel oil (PFO). Two effects are generated by adding MP. One is an enhancement of thermal stability due to the high thermal property of the additive; the other is that the volatile compounds that were removed by vaporization of PFO during the thermal reaction can participate in the pitch synthesis reaction (PFO→pitch) more efficiently. The effect differs according to... -
Manufacturing and characteristics of PAN-based composite carbon fibers containing cellulose particles
Jee-Woo Yang, Da Young Jin, Ji Eun Lee, Seung Goo Lee, Won Ho Park 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 7 203-210 (8 pages)
and Fig. 9. Tensile strengths decreased as the carbonized cellulose parti- cle content decreased, in the case of the samples with the 400°C and 1200°C carbonized cellulose particles at 1.5 and 2.0 wt%. Such results are due to the carbonized cellulose particles acting as impurities in carbon fbers to form defects in the structures, and is attributed to a decrease in strength with an increase... This study fabricated low thermal conductive polyacrylonitrile (PAN)-based carbon fibers containing cellulose particles while maintaining their mechanical properties. The high thermal conductivity of carbon fibers limits their application as a high temperature insulator in various systems such as an insulator for propulsion parts in aerospace or missile systems. By controlling process parameters such as the heat treatment temperature of the cellulose particles and the amount of cellulose added,... -
Bulk graphite: materials and manufacturing process
Sang-Min Lee, Dong-Su Kang and Jea-Seung Roh 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 1 135-146 (12 pages)
and processing. Table 9 presents the concentration of impurities after purifcation for a 4 by 4 in bulk graphite [83]. Table 9. Representative impurity levels of three classes of graph- ite [83] Impurity Impurity level, ppm Unpurifed Thermally purifed Chemically purifed Total ash 1600 540 5 Silicon 94 46 <1 Iron 310 10 <2 Vanadium 30 25 <0.2 Titanium 34 11 1 Aluminum 40 2.5 0.1 Calcium 320 147... Graphite can be classified into natural graphite from mines and artificial graphite. Due to its outstanding properties such as light weight, thermal resistance, electrical conductivity, thermal conductivity, chemical stability, and high-temperature strength, artificial graphite is used across various industries in powder form and bulk form. Artificial graphite of powder form is usually used as anode materials for secondary cells, while artificial graphite of bulk form is used in steelmaking... -
Carbon-allotropes: synthesis methods, applications and future perspectives
P. S. Karthik, A. L. Himaja and Surya Prakash Singh 한국탄소학회 Carbon Letters 19 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.4 1 219-237 (19 pages)
were the following. For UV analysis the solution exhibited (Fig. 34) deep green fuores- cence at 365 nm. The fuorescence was expected because of the recombination of electron-hole pairs from impurity at- oms and oxygen functional groups [60]. The actual mecha- nism of multicoloured luminescence is still unclear. Samples characterized under UV-Vis spectroscopy at a time interval of 30 min show... The element carbon has been used as a source of energy for the past few hundred years, and now in this era of technology, carbon has played a significant and very prominent role in almost all fields of science and technology. So as an honour to this marvellous element, we humans should know about its various forms of existence. In this review article, we shed light on all possible carbon-allotropes; similarities in their synthesis techniques and the starting materials; their wide range of... -
Enhanced electrocapacitive performance and high power density of polypyrrole/graphene oxide nanocomposites prepared at reduced temperature
Harish Mudila, Varsha Joshi, Sweta Rana, Mohmd. Ghulam Haider Zaidi, Sarfaraz Alam 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.3 3 171-179 (9 pages)
50 mL), where the grey-black GO was separated. The GO was isolated through fltration and succes- sively washed with deionized water to remove the salt impurity contaminants. The purifed GO was dried at 45 ± 1°C for 48 h. 2.2. Preparation of the PNCs A pair from a series of PPY-GO nanocomposites (PNCs) was separately prepared at ambient (30 ± 1°C) and reduced tempera- tures (10 ± 1°C) in... An attempt was made to investigate the effect of the preparation temperature on the electrocapacitive performance of polypyrrole (PPY)/graphene oxide (GO) nanocomposites (PNCs). For this purpose, a series of PNCs were prepared at various temperatures by the cetyltrimethylammonium bromide-assisted dilute-solution polymerization of pyrrole in presence of GO (wt%) ranging from 1.0 to 4.0 with ferric chloride as an oxidant. The formation of the PNCs was ascertained through Fourier-transform infrared... -
Purification of Multi Walled Carbon Nanotubes (Mwcnts) Synthesized by Arc Discharge Set Up
Y.Malathi, Balaji Padya, K.V.P.Prabhakar, P.K.Jain 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2010, Vol.11 No.3 3 184-191 (8 pages)
the impurity particles were removed and the weight loss is about 28.5%. But some more impurities still exist, probably due to insufficient oxygen for all the impurities to completely oxidized. It was observed that oxidation at temperatures more than 650 oC, more carbon nanotubes are Fig. 1.SEM images of thermally annealed CNT at various tem- peratures: (a) Pristine (b) 450 oC (c) 550 oC (d) 650 oC...