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Effect of the Length of Feed Withdrawal on Weight Loss, Yield and Meat Color of Broiler
Kim, D.H.,Yoo, Y.M.,Kim, S.H.,Jang, B.G.,Park, B.Y.,Cho, S.H.,Seong, P.N.,Hah, K.H.,Lee, J.M.,Kim, Y.K.,Hwang, I.H. Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.1
The current study was conducted to determine the optimum length of feed withdrawal for pre-harvest broilers. A total of three hundred broilers were sampled from an industrial population, and 30 chicks for each weight group (e.g., 1.5 and 2.5 kg) were randomly assigned to feed withdrawal treatments for 0, 3, 6, 9 and 12 h. Weight loss, yield, muscle pH, objective meat color and weights of gastro intestinal contents, crop, gizzard, provenriculus, small intestine, caecum, and rectum were determined. Live weight loss was significantly (p<0.05) increased as length of feed withdrawal extended. A significant (p<0.05) carcass yield for both 1.5 and 2.5 kg groups coincided after 9 and 6 h feed withdrawal, respectively. Net weights of intestinal contents for crop and gizzard were significantly (p<0.05) reduced by 6 h, and the reduction for proventriculus and small intestine occurred from 3 h. A noticeable effect of feed withdrawal on pH for breast muscle at 3 h postmortem occurred only when chicks were fasted for 3 h of which pH (6.05) was significantly (p<0.05) higher than that for other groups including the control (5.74). There was a linear tendency of higher lightness (Hunter L* value) numerically for chicks fasted for longer periods. The highest coefficient of determinations of regression models to estimate weight loss as a function of fasting period and body weights were achieved, when the models included both linear and quadratic terms for fasting period, and linear term for both 1.5 ($R^2=0.76$) and 2.5 kg ($R^2=0.78$) body weight groups. Given the practical aspect, approximately 1.5 kg of body weight is dominant, weight loss could be predicted by the following function; live weight $loss=26.6-0.28{\times}(fasting period)^2+12.34{\times}pasting\;period-0.012{\times}body\;weight$, $R^2=0.76$. Current data implied that the optimum fasting time for pre-slaughter chicks varied depending on slaughter weight; 6 and 9-h fasting were recommendable for 2.5 and 1.5 kg chicks, with little effect on objective meat color.
Song, Joon Young,Noh, Ji Yun,Lee, Jacob,Woo, Heung Jeong,Lee, Jin Soo,Wie, Seong-Heon,Kim, Young Keun,Jeong, Hye Won,Kim, Shin Woo,Lee, Sun Hee,Park, Kyung-Hwa,Kang, Seong Hui,Kee, Sae Yoon,Kim, Tae H KOREAN ACADEMY OF MEDICAL SCIENCE 2018 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.33 No.7
<P>Since 2013, the Hospital-based Influenza Morbidity and Mortality (HIMM) surveillance system began a H7N9 influenza surveillance scheme for returning travelers in addition to pre-existing emergency room (ER)-based influenza-like illness (ILI) surveillance and severe acute respiratory infection (SARI) surveillance. Although limited to eastern China, avian A/H7N9 influenza virus is considered to have the highest pandemic potential among currently circulating influenza viruses. During the study period between October 1st, 2013 and April 30th, 2016, 11 cases presented with ILI within seven days of travel return. These patients visited China, Hong Kong, or neighboring Southeast Asian countries, but none of them visited a livestock market. Seasonal influenza virus (54.5%, 6 among 11) was the most common cause of ILI among returning travelers, and avian A/H7N9 influenza virus was not detected during the study period.</P>
Tuning microcavities in thermally rearranged polymer membranes for CO<sub>2</sub> capture
Han, S. H.,Kwon, H. J.,Kim, K. Y.,Seong, J. G.,Park, C. H.,Kim, S.,Doherty, C. M.,Thornton, A. W.,Hill, A. J.,Lozano, Á,. E.,Berchtold, K. A.,Lee, Y. M. The Royal Society of Chemistry 2012 Physical Chemistry Chemical Physics Vol.14 No.13
<P>Microporous materials have a great importance in catalysis, delivery, storage and separation in terms of their performance and efficiency. Most microporous materials are comprised of inorganic frameworks, while thermally rearranged (TR) polymers are a microporous organic polymer which is tuned to optimize the cavity sizes and distribution for difficult separation applications. The sub-nano sized microcavities are controlled by <I>in situ</I> thermal treatment conditions which have been investigated by positron annihilation lifetime spectroscopy (PALS). The size and relative number of cavities increased from room temperature to 230 °C resulting in improvements in both permeabilities and selectivities for H<SUB>2</SUB>/CO<SUB>2</SUB> separation due to the significant increase of gas diffusion and decrease of CO<SUB>2</SUB> solubility. The highest performance of the well-tuned TR-polymer membrane was 206 Barrer for H<SUB>2</SUB> permeability and 6.2 of H<SUB>2</SUB>/CO<SUB>2</SUB> selectivity, exceeding the polymeric upper bound for gas separation membranes.</P> <P>Graphic Abstract</P><P>Thermally rearranged polybenzoxazoles with tuned cavities for hydrogen purification and carbon dioxide separation even at high temperature were developed to apply for a syn gas separation. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cp23729f'> </P>
Lee, J.H.,Huynh-Nguyen, B.C.,Ko, E.,Kim, J.H.,Seong, G.H. Elsevier Sequoia 2016 Sensors and actuators. B Chemical Vol.224 No.-
We present a simple method to fabricate flexible, transparent silver nanowire (AgNW) films. Homogenous AgNW networks were formed on a mixed cellulose ester (MCE) membrane by vacuum filtration and were easily transferable to self-adhesive poly(ethylene terephthalate). The opaque, white MCE membrane became transparent after being subjected to hot acetone vapor. The fabricated AgNW films had an average resistivity of 13Ω/sq and a transmittance of approximately 67%. Moreover, the AgNW films showed excellent mechanical properties in repeated adhesion tests and bending tests. The AgNW films also showed good resistance against heat and NaCl solutions. AgNW films were patterned by a combination of soft lithography and a solution-based chemical etching technique. The area under the photoresist polymer maintained its conductivity and transmittance after etching, whereas increased resistance and transparency were observed in the etched area. The suitability of the patterned AgNW electrodes for electronic devices was demonstrated via a simple LED chip array. After using standard photolithography to define the working area, AgNW films were used as sensor electrodes for the electrochemical detection of hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>). The AgNW sensors displayed a reasonable detection limit of 46μM (S/N=3), a rapid response time (within 2s), and high sensitivity (749μAmM<SUP>-1</SUP>cm<SUP>-2</SUP> and 1640μAmM<SUP>-1</SUP>cm<SUP>-2</SUP>). Furthermore, the AgNW sensor was resistant to other potential interfering electroactive species commonly present in physiological samples such as l-ascorbic acid, glucose, and sodium oxalate. These results indicate that the AgNW sensor is selective for electroreduction of H<SUB>2</SUB>O<SUB>2</SUB>. Additionally, the developed sensor exhibited a stable amperometric response to the reduction of H<SUB>2</SUB>O<SUB>2</SUB> even after extended storage.
Biological evaluation of anti-influenza viral activity of semi-synthetic catechin derivatives
Song, J.M.,Park, K.D.,Lee, K.H.,Byun, Y.H.,Park, J.H.,Kim, S.H.,Kim, J.H.,Seong, B.L. Elsevier/North-Holland 2007 ANTIVIRAL RESEARCH Vol.76 No.2
Catechin derivatives with different alkyl chain length and aromatic ring substitutions at the 3-hydroxyl group were synthesized from epigallocatechin (EGC) and (+)-catechin (C) and their anti-influenza viral activity were evaluated in vitro and in ovo. Pronounced antiviral activity was observed for derivatives carrying moderate chain length (7-9 carbons) as compared to those with aromatic rings, whereas the 5'-hydroxyl group of the trihydroxy benzyl moiety did not significantly contribute to antiviral activity. The derivatives exerted inhibitory effects for all six influenza subtypes tested including three major types of currently circulating human influenza viruses (A/H1N1, A/H3N2 and B type), H2N2 and H9N2 avian influenza virus. The compounds strongly inhibited adsorption of the viruses on red blood cell (RBC). They also restricted the growth of avian influenza virus in ovo with minimum inhibition concentration (MIC) of 5-10μM far exceeding the neuraminidase (NA) inhibitor oseltamivir or M2 proton channel inhibitor amantadine. The antiviral activity appears to be mediated by interaction with hemagglutinin (HA)/viral membrane rendering HA less fusogenic at the initial stage of infection. The broad spectrum activity against various subtypes of influenza viruses may complement the limitations of current antivirals and contribute for managing potentially emerging influenza pandemic. The structure-activity data of catechin derivatives may usefully guideline future research endeavors for applying green tea catechins as alternative anti-viral agents.
조진호,박일용,임형규,윤영호,성기웅,정의성,한지훈,김민규,이상흔 한국장애인재활협회 2006 재활복지 Vol.10 No.3
인구의 고령화가 진행되면서 난청인구는 증가하고 있으며 난청자들은 일반적으로 공기전도형 보청기를 사용하고 있다. 이러한 보청기는 미용문제와 귀 폐쇄감 및 하울링 현상 등으로 인해 난청자들이 기피하고 있으며, 이를 극복하기 위한 방법으로 완전히 은닉할 수 있고 음향 피드백의 영향이 적은 완전 이식형 인공중이 시스템이 전 세계적으로 주목받고 있다. 경북대 첨단 감각기능 회복장치연구센터(Advanced Research Center for Recovery of Human Sensibility, ACRHS)는 보건복지부의 지원과 (주)파이컴의 참여 하에, 약 4년간의 연구 결과로 차동 전자 트랜스듀서를 기반으로 하는 완전 이식형 인공중이 시스템의 시제품 ACROHS-1.5와 그 주변장치로 무선 제어기 및 무선 충전장치를 각각 구현하고 실험을 통해 평가하였다. 현재는 제작된 시제품을 기반으로 한국식품의약품안전청 (KFDA)의 시험을 받기 위한 준비과정에 있다. Recently, persons who have difficulty in hearing are increase as aging of population, conventional hearing aids are generally used by them. In contrast with conventional hearing aids, implantable middle ear hearing devices (IMEHDs) with the advantages of complete concealment, occlusion of ear, and reduction of acoustic feedback are remarkable methods to overcome difficulties of people who have from moderate hearing loss to severe hearing loss. At Advanced Research Center for Recovery of Human Sensibility (ACRHS) in Kyungpook National University (KNU) under the auspices of Korean Ministry of Health & Welfare (KMHW) and PHICOM Co, as the products of their research during 4 years, fully implantable middle ear hearing device (ACROHS-1.5) based on a differential floating mass transducer (DFMT), an implantable microphone, a remote controller, and a wireless charger have been implemented. Each prototype has been evaluated through several experiments. In the present time, we are going to prepare clinical trials for approval of Korean Food and Drug Administration (KFDA).