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Therapeutic Effect of Dioctahedral Smectite on Diarrhea Caused by E. coli and Salmonella in Calves
Hu Jang Lee1,3*, Chun-Nam Cha, Yeo-Eun Lee, Hyunju Choi, Joon-Seob Shin, Suk Kim 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.2
The objectives of the current study were to evaluate the therapeutic effect of dioctahedral smectite (smectite) against calf diarrhea caused by pathogenic E. coli and/or Salmonella typhimurium. In this study, 20 calves (aged 2~3 months) with diarrhea were used for evaluation of the efficacy of smectite on calf diarrhea with 20% smectite suspension in PBS. Calves received 10 ml smectite suspension three times per day after feeding, and fecal samples were collected at the gate of treatment and on the first, second, third, fourth, and fifth day after administration. On the fifth day after treatment with smectite suspension, the diarrhea index showed a significant decrease in the treated group, compared to the control group (P<0.001). The number of pathogenic E. coli in feces of the treated group was significantly decreased, compared to each control group from the second day after treatment (P<0.001), and that of Salmonella typhimurium was significantly decreased from the first day after treatment (P<0.05). According to the results of the current study, 20% smectite suspension had a therapeutic effect on diarrhea caused by E. coli and/or Salmonella in calves.
강호조,이후장,정태성,김도경,어용준,김재황 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.3
Feather waste, generated in large quantities as a byproduct of commercial poultry processing, is almost pure keratin, which is not easily degradable by common proteolytic enzymes. Several feather-degrading bacterial isolates were isolated from feather waste and soil. These isolates were able to degrade chicken feather, when grown on basal medium containing 1.0% native feather as a source of energy, carbon, and nitrogen. The isolates were characterized according to morphological characteristics and biochemical tests, and Vitek and API kit system. belonging to the Acinetobacter calcoaceticus complex, Bacillus thuringiensis, Bacillus circulans, Bacillus cereus. It was observed that aerobic growth by the isolate on single whole chicken feather, resulted in complete degradation of the keratin protein after 5-6 days of incubation at 37℃. The production of protein by the organism was decreased with cultivation time, with the maximum activity coinciding with the start of the stationary phase. The kerationolytic activity increased with cultivation time.
Jang, Jeongsu,Lee, Yangjin,Yoon, Jun-Yeong,Yoon, Hoon Hahn,Koo, Jahyun,Choe, Jeongheon,Jeon, Sungho,Sung, Jongbaek,Park, Jungwon,Lee, Won Chul,Lee, Hoonkyung,Jeong, Hu Young,Park, Kibog,Kim, Kwanpyo American Chemical Society 2018 Nano letters Vol.18 No.10
<P>The van der Waals epitaxy of functional materials provides an interesting and efficient way to manipulate the electrical properties of various hybrid two-dimensional (2D) systems. Here we show the controlled epitaxial assembly of semiconducting one-dimensional (1D) atomic chains, AuCN, on graphene and investigate the electrical properties of 1D/2D van der Waals heterostructures. AuCN nanowire assembly is tuned by different growth conditions, although the epitaxial alignment between AuCN chains and graphene remains unchanged. The switching of the preferred nanowire growth axis indicates that diffusion kinetics affects the nanowire formation process. Semiconducting AuCN chains endow the 1D/2D hybrid system with a strong responsivity to photons with an energy above 2.7 eV, which is consistent with the bandgap of AuCN. A large UV response (responsivity ∼10<SUP>4</SUP> A/W) was observed under illumination using 3.1 eV (400 nm) photons. Our study clearly demonstrates that 1D chain-structured semiconductors can play a crucial role as a component in multifunctional van der Waals heterostructures.</P> [FIG OMISSION]</BR>
Awareness of Asbestos and Action Plans for Its Exposure can Help Lives Exposed to Asbestos
Lee, Hu-Jang,Park, Eun-Kee,Wilson, Donald,Tutkun, Engin,Oak, Chulho Occupational Safety and Health Research Institute 2013 Safety and health at work Vol.4 No.2
Despite the fact that asbestos is a known carcinogen to humans, it is still used in industrialized countries, especially Asian countries. The global incidence of asbestos-related diseases (ARDs) due to the past use of asbestos, continues to increase, although many countries have adopted a total ban on asbestos use. The implementation of effective strategies to eliminate ARDs is therefore an important challenge in Asia, where asbestos is still mined and consumed. Collaborative efforts and strategies at the local and international levels are vital, in the pursuit toward the elimination of ARDs in this region.
Evaluation for the Safety of Bee Venom in ICR Mice
Hu Jang Lee, Chun-Nam Cha, Yeo-Eun Lee, In-Jin Kang, Suk Kim 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.1
This study was conducted in order to examine the safety of bee venom as an alternative for antibiotics using male ICR mice. Five-week-old male mice received a single intravenous injection of a dried honey bee venom at the concentration of 0.25 mg/kg (a clinical dose) or 0.5 mg/kg through the tail vein and various pathophysiological analyses were performed after three days. No significant differences in changes of body weight were observed between the saline-treated control group and the experimental groups. In the hematological analysis, none of the parameters were affected by bee venom. In blood biochemistry analysis, none of the markers were affected by administration of bee venom. Similarly, there were no significant effects on markers for liver, kidney, and skeletal muscle functions in all treated- groups. On macroscopic examination, no remarkable lesions were detected in these organs. Because there were no adverse effects of the bee venom in a single intravenous toxicity test for three days, it was concluded that bee venom could be a candidate for a safe natural antibiotic for use in the animal production industry.
이후석 ( Lee Hu Seog ),이장주 ( Lee Jang Ju ) 대한관광경영학회 2004 觀光硏究 Vol.18 No.3
The aim of this study is to investigate the profile of the cultural tourists. Above all, the questionnaire was conducted on 449 visitors at the National Museum in that this article had perceived the importance of the museum as a factor for urban tourism and attempted the new method of the study on Korean cultural tourism. The focus was to get hold of demographic characteristics on visitors and to analyze the number of visiting four cultural attractions. Characteristics and attractions were analyzed by frequency analysis and relationship between visitors and the number of visiting by cross tabulation analysis and multiple regression analysis. The results are as follows: Firstly, People of 15~19(71.7%), residents in the capital area(83.9%), students(63.9%), and collegians or university graduates(66.8%) have mainly visited the National Museum of Korea. Secondly, the result analyzed by using t-test and one-way anova between visitors` characteristics on the population statistics side and the number visiting cultural attractions is that Seoul Arts Center has differences in all of 7 variations of population statistics. Thirdly, the leisure factors which has impact on visitors` approach are feeling comfortable and doing something worthwhile. Fourthly, the impact of the number of visiting cultural attractions respectively has more or less high one between National Museum of Korea and Seoul Arts Center.