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( Changyong Choe ),( Young-hun Jung ),( Yoon Jung Do ),( Hee-sung Kang ),( Jae-gyu Yoo ),( Chan-lan Kim ),( Ui-hyung Kim ),( Ru-hui Song ),( Jinho Park ) 한국동물위생학회(구 한국가축위생학회) 2018 韓國家畜衛生學會誌 Vol.41 No.3
Blood tests have been used to develop treatment plans, such as disease diagnosis, treatment effect, and prognosis determination in livestock. The present study examined changes in the blood count, including RBCs, WBCs, and platelets, before and after grazing among the Korean native cattle grazing from spring to autumn. The study compared the blood count of livestock group (A, n=34) that returned from the rangeland to cowshed every evening and livestock group (B, n=21) that were not returned from the rangeland to cowshed every evening during the grazing period. Hematological parameters such as RBC, hemoglobin, hematocrit, MCV, and WBC, neutrophil, eosinophil, monocyte, and lymphocyte were determined using a blood cell analyzer. Livestock group (A) showed significant differences in the values of RBC, MCV, MCHC, WBC, EOS, and LYM. Livestock group (B) showed significant differences in the values of RBC, Hb, HCT, MCV, MCH, PLT, NEU, and BAS. In particular, the RBC count decreased after grazing when compared with that before grazing. Compared with that before grazing, low RBC count was maintained from the first to fifth month of grazing. The WBC count increased from the fourth month of grazing, whereas the EOS count increased from the second month of grazing. These results suggest that the values of RBC and WBC vary before and after grazing, and also with the grazing period. Furthermore, it is necessary to develop a detailed feeding management based on these values of blood analysis for livestock that are raised continuously in the rangeland.
최창용 ( Changyong Choe ),정영훈 ( Young-hun Jung ),도윤정 ( Yoon-jung Do ),조아라 ( Ara Cho ),강석진 ( Seog-jin Kang ),김의형 ( Ui-hyung Kim ),김찬란 ( Chan-lan Kim ),신상민 ( Sang-min Shin ),류재규 ( Jae-gyu Yoo ),탁동섭 ( Dongs 한국동물위생학회(구 한국가축위생학회) 2018 韓國家畜衛生學會誌 Vol.41 No.1
The best way to prevent foot-and-mouth disease (FMD) constantly occurring in Korea will be vaccination. In this study, FMD vaccines were given to Korean native cattle (Hanwoo), dairy cattle, and pigs to investigate the antibody positive rate of FMD vaccine by age in year and month. Hanwoo, dairy cattle, and pigs showed antibody positive rates of 99.5%, 97.7%, and 95.9%, respectively. High antibody positive rates more than 95% were found in Hanwoo and dairy cattle. In particular, high antibody positive rates were found in Hanwoo and dairy cattle regardless of age. Pigs showed a relatively low antibody positive rate of 57.6% at 3 months of age and then constantly maintained a high antibody positive rate of above 95.0% after 4 months of age. As a result of this study, high antibody positive rates were found when regular FMD vaccination was given to newborn calves and piglets after FMD vaccination twice to them. Therefore, it is considered the most important to receive vaccination thoroughly according to vaccination plan in order to prevent FMD.
Choe, Changyong,Jung, Young-Hun,Do, Yoon Jung,Kang, Hee-Sung,Yoo, Jae-Gyu,Kim, Chan-Lan,Kim, Ui-Hyung,Song, Ru-hui,Park, Jinho The Korean Society of Veterinary Service 2018 韓國家畜衛生學會誌 Vol.41 No.3
Blood tests have been used to develop treatment plans, such as disease diagnosis, treatment effect, and prognosis determination in livestock. The present study examined changes in the blood count, including RBCs, WBCs, and platelets, before and after grazing among the Korean native cattle grazing from spring to autumn. The study compared the blood count of livestock group (A, n=34) that returned from the rangeland to cowshed every evening and livestock group (B, n=21) that were not returned from the rangeland to cowshed every evening during the grazing period. Hematological parameters such as RBC, hemoglobin, hematocrit, MCV, and WBC, neutrophil, eosinophil, monocyte, and lymphocyte were determined using a blood cell analyzer. Livestock group (A) showed significant differences in the values of RBC, MCV, MCHC, WBC, EOS, and LYM. Livestock group (B) showed significant differences in the values of RBC, Hb, HCT, MCV, MCH, PLT, NEU, and BAS. In particular, the RBC count decreased after grazing when compared with that before grazing. Compared with that before grazing, low RBC count was maintained from the first to fifth month of grazing. The WBC count increased from the fourth month of grazing, whereas the EOS count increased from the second month of grazing. These results suggest that the values of RBC and WBC vary before and after grazing, and also with the grazing period. Furthermore, it is necessary to develop a detailed feeding management based on these values of blood analysis for livestock that are raised continuously in the rangeland.
신속 진단 킷트를 활용한 한우 송아지의 설사증 원인체 검사
최창용 ( Changyong Choe ),정영훈 ( Young-hun Jung ),도윤정 ( Yoon-jung Do ),조아라 ( Ara Cho ),김성범 ( Seong-bum Kim ),강희성 ( Hee-sung Kang ),류재규 ( Jae-gyu Yoo ),박진호 ( Jinho Park ) 한국가축위생학회 2017 韓國家畜衛生學會誌 Vol.40 No.1
Calf diarrhea is a disease experienced by almost all of calves after birth and is one of the representative causes of damage to farmers due to mass mortality and of economic losses to them by inhibiting normal growth. In this study, we conducted quick detection of etiologic agents of diarrhea by using a rapid diagnostic kit to multiply diagnose antigens of five etiologic agents of calf diarrhea (rotavirus, coronavirus, Escherichia coli, Cryptosporidium, Giardia) in Hanwoo (Korean native cattle) calves. When the positive antigen proportion of the calf diarrheal feces for each farm was analyzed, rotavirus, coronavirus, Escherichia coli, Cryptosporidium, and Giardia showed antigen positive rates of 0∼67%, 0∼20%, 0∼60%, 0∼20%, and 0∼67%, respectively. With regard to the antigen positive rate by age in days after birth, 1-week-old calves showed the antigen positive rate of 20% in rotavirus and 20% in Giardia, and 2-week-old calves showed that of 50% in rotavirus. In addition, 4-week-old calves showed the antigen positive rate of 10% in rotavirus, 10% in coronavirus, 10% in Escherichia coli, and 30% in Giardia, and 8-week-old calves showed the antigen positive rate of 17% in coronavirus, 50% in Escherichia coli, 17% in Cryptosporidium, and 33% in Giardia. Based on the results of this study, the etiologic agents of diarrhea in Hanwoo calves for each farm are widely distributed. Although younger than 2-week-old calves were strongly positive for rotavirus, older than 4-week-old calves were highly positive for Giardia and Escherichia coli. In conclusion, we considered that a rapid diagnostic kit is an effective method for quick detection of etiologic agents and would be helpful for cattle farmers and veterinarians to select appropriate therapeutic method.
유전자 전달체로 응용하기위해 Folate와 Poly-L-lysine이 결합된 O-carboxymethyl Chitosan의 제조
정경원 ( Gyeong Won Jung ),박순정 ( Sun Jung Park ),김영민 ( Young Min Kim ),남정표 ( Joung Pyo Nam ),최창용 ( Changyong Choi ),박성철 ( Seong Cheol Park ),나재운 ( Jae Woon Nah ),장미경 ( Mi Kyeong Jang ) 한국키틴키토산학회 2013 한국키틴키토산학회지 Vol.18 No.4
In present study, PLL-OCMCh-PEG-FA (POCPF) was prepared to apply the cell targeting gene delivery carrier. The POCPF copolymer was characterized by 1-proton nuclear magnetic resonance ( 1 H-NMR). The result indicated that POCPF has been successfully synthesized. The particle size of the POCPF was 188 ~ 320nm, which was measured by DLS (Dynamic Light Scattering). In addition, gel retardation assay showed that the POCPF has potential to bind with pDNA. Also, it showed that POCPF can be protected pDNA from DNase. The gene transfection efficiency of the POCPF was evaluated in HCT119 cells. The result showed that transfection efficiency of the POCPF was better than the OCMCh and PLL (Poly-L-lysine) via receptor mediate endocytosis between FA and FA receptor on cancer cell surface. The results demonstrated that POCPF copolymer is good candidate as a gene carrier for gene therapy.
Jung, Namchul,Kim, Darae,Yim, Changyong,Park, Jin-Young,Chang, Byoung-Yong,Jeon, Sangmin The Electrochemical Society 2014 Journal of the Electrochemical Society Vol.161 No.2
<P>A novel quartz resonator has been developed for the synchronized measurement of changes in mass and electrical impedance during the adsorption of various concentrations of bovine serum albumin (BSA). The top platinum surface of the quartz crystal was used as the working electrode and real-time Fourier transform analysis was conducted to obtain time-resolved electrochemical impedance spectra. The change in mass due to the BSA adsorption was calculated from the change in the frequency of the quartz resonator. These simultaneous measurements of mass and electrical impedance were used to determine not only the kinetics of protein adsorption but also the morphological changes in the adsorbed layer, which were confirmed with atomic force microscopy.</P>
Pattern-Reconfigurable MIMO Antenna for High Isolation and Low Correlation
Changyong Rhee,Yongjin Kim,Taejoon Park,Sung-su Kwoun,Byeonggwi Mun,Byungje Lee,Changwon Jung IEEE 2014 IEEE antennas and wireless propagation letters Vol.13 No.-
<P>In this letter, a reconfigurable radiation pattern antenna for multiple-input-multiple-output (MIMO) applications on mobile devices is proposed. The operating frequency band of the antenna is 5.15-5.35 GHz for a wireless local area network (WLAN) 802.11a service. Each antenna is composed of a loop-and-dipole structure, as well as two switches for the reconfigurable radiation pattern, to generate a beam in three different directions. The proposed antenna is designed to have an orthogonally directional radiation pattern with high isolation and a low-correlation coefficient in the MIMO environment.</P>