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        검색결과 26

        2.
        2018.11 구독 인증기관·개인회원 무료
        This study was conducted to investigate effect of feeding beet pulp on reproductive performance, colostrum composition and microbiological characteristics in sows. A total of 12 sows(Landrace×Yorkshire) were randomly allotted three dietary treatments at gestating 90 days. The diets were prepared by adding 0, 5 and 10% of the beet pulp in basal diets. The pigs fed 5% beet pulp showed higher litter size than the 0 and 10% beet pulp treatments, although there was not significant among the treatments. Similarly, birth and 21days weight in piglet were not different among the treatments. In colostrum fat, protein, lactose, citric acid, solid, ffa, true protein were ranged to reference values, but not difference among the treatments. E.coli of feces was lower(P<0.01) in the 5% beet pulp than the 0 and 10% beet pulp treatments. But no effect was observed on Lactobacilli of feces among dietary treatments. These our results indicate the beet pulp has no significant effect of reproductive performance and colostrum composition in sows. But, 5% level beet pulp is effective for reduction of intestinal pathogenic microorganisms.
        5.
        2015.11 구독 인증기관·개인회원 무료
        Medical mushroom, Phellinus linteus and Phellinus baumii called as “Sanghwang” have cultivated in Korea. PL has been studied extensively for its extraordinary capacity of suppressing cancer or enhancing body immunity. The mycelial materials of PL have mainly been used as research samples worldwide because fruiting bodies was difficult to be artificially cultivated. Alternatively, P. baumii (variety, ‘Jangsu’) have been cultivated in Korea. However, fruiting body morphology of P. baumii is clearly different to that of PL. Generally, Phellinus spp. including P. linteus slowly grow on artificial medium such as Potato Dextrose Agar (PDA). In contrast, P. baumii strains were rapidly grown on the artificial media when compared to other Phellinus spp. and thus it was considerable that its mycelial growing ability can be acted as a factor for producing fruiting bodies. This study aimed to find Phellinus isolates having high mycelial growth rate. Five Phellinus isolates that show rapid growth rate on YGM medium were selected from 36 Phellinus isolates collected in Korea. They were identified on nucleotide sequences of rDNA-ITS region. Phellinus linteus strain and Phellinus spp. showing mycelial growth rate comparing to P. baumii were characterized on cultural and bioactive characteristics (antioxidant activity and immune activation).
        6.
        2015.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        To investigate the in vivo cognitive effects of syringic acid(SA), Y-maze and passive avoidance tests were performed in amyloid-β(Aβ)-induced cytotoxicity. Learning and memory impairment by Aβ neurotoxicity was partially recovered in Institute of Cancer Research(ICR) mice orally administered SA(10mg/kg of body weight). The SA treated group showed an inhibitory effect on acetylcholinesterase(AChE) that was extracted from mice brain tissue after in vivo tests. Aβ-induced oxidative stress was also examined by malondialdehyde(MDA) and 2',7,-dichlorofluorescein diacetate(DCF-DA) assays, and lipid peroxidation of brain homogenates and cellular oxidative stress were reduced by SA. In cell viability assays using 3-[4,5-dimethythiazol-2-yl]-2,5-diphenyl tetrazolium bromide(MTT), lactate dehydrogenase(LDH) leakage, and caspase 3/7 activity, the SA treated group showed relatively effective protection against Aβ-induced neurotoxicity compared to the others. Consequently, these results suggest that SA in black soybean seed coat extract might improve cognitive function because of its neuronal cell protective effects against oxidative stress and the inhibitory effect of AChE as a cholinergic enzyme.
        4,300원
        7.
        2014.12 구독 인증기관 무료, 개인회원 유료
        The objective of this study was to determine the effects of E. coli on boar sperm quality and reproductive performance in sows after artificial insemination. Three different levels of E. coli were artificially inoculated to semen with following concentrations; Control, 500, 5,000 and 50,000 colony forming unit (cfu)/ml. Semen samples were preserved at 17℃ for 5 days. Sperm motility was significantly decreased (p<0.05) on day 3 in the group inoculated with 5,000cfu/ml compared to control groups. In all treatment groups, sperm motility was gradually decreased as storage time increased, but the decline pattern was more drastic in the groups inoculated with 5,000 and 50,000 cfu/ml groups from day 3 (p<0.05) compared to control group. After 3 day of storage at 17℃, sperm viability in sample inoculated with the highest concentration (50,000 cfu/ml) of bacteria was less (p<0.05) than that of control group. The pH of semen sample pH was maintained 7.2~7.5 in all groups during the experimental period. No differences (p>0.05) were found for both storage time and bacterial concentration. The pregnancy rate and live born piglets tend to decrease by increasing the concentration of E. coli in semen. In particular, the rate of pregnancy was lower in the group inoculated with 50,000 cfu/ml (58.3%) compare to the other groups (81.8, 75.0, 76.5%). These results suggest that the contamination of E. coli in boar semen negatively affects fertilizing ability of boar sperm and the reproductive performance obtained from sows after artificial insemination.
        4,000원
        8.
        2014.04 구독 인증기관·개인회원 무료
        Screening for antimicrobial peptide genes in the immune-induced Antheraea yamamai larvae led to the identification of a novel antifungal moricin-like peptide (MLP10) gene. The complete MLP10 cDNA is comprised of 403 bp with 174 bp open reading frame encoding a 58 amino acid precursor that contains a putative 23-residue signal peptide, a 2-residue propeptide and a 33-residue mature peptide. The deduced amino acid sequence of MLP10 has 26∼52% identity to those of moricin-related peptides from lepidopteran insects. The MLP10 was highly expressed in E. coli BL21(DE3) by fusing with ketosteroid isomerase (KSI) to avoid the cell death during induction. The resulting expressed KSI-MLP10 fusion protein was in a insoluble form. Recombinant MLP10 was released by cleavage of the fusion protein with cyanogen bromide (CNBr). Subsequently, we purified pure active MLP10 by FPLC chromatography, and 5.2mg of MLP10 was obtained from 1L culture medium. The purified MLP10 was prevented the growth of candida albicans at 6.25 uM, and was also active against gram negative and gram positive bacteria. This potent antimicrobial activity suggests that MLP10 may play a role in the immune response of A. yamamai.
        9.
        2011.09 구독 인증기관 무료, 개인회원 유료
        This study was undertaken to evaluate the relationship between in vitro maturation and plasminogen activators (PAs) activity on porcine cumulus-oocytes complexes (COCs) exposed to oxidative stress. When COCs were cultured in maturation medium with hydrogen peroxide (H2O2), the proportion of the germinal vesicle breakdown (GVBD) and oocytes maturation were decreased with addition of H2O2, and were significantly (p<0.05) lower in medium with 0.1 mM H2O2 than control group. Also, the rate of degenerated oocytes was increased in as H2O2 concentration increased. When COCs were cultured for 48 h, three plasminogen-dependent lytic bands were observed: tissue-type PA (tPA); urokinase-type PA (uPA); and tPA-PA inhibitor (tPA-PAI). PA activity was quantified using SDS-PAGE and zymography. When H2O2 concentration was increased, tPA and tPA-PAI activities also increased in porcine oocytes cultured for 48 h, but not uPA. In other experiment, embryos were divided into three groups and cultured in (1) control medium, (2) control medium with 1.0 mM H2O2 and (3) control medium with 1.0 mM H2O2 along with catalase in concentrations of 0.01, 0.1, and 1.0 mg/ml, respectively. H2O2 decreased the rate of GVBD and maturation in porcine COCs but catalase revealed protective activity against oxidative stress caused by H2O2. In this experiment, tPA and tPA-PAI activities were higher in media with 1.0 mM H2O2 alone. Increasing concentration of catalase decreased tPA and tPA-PAI activities in porcine oocytes. These results indicate that the exposure of porcine follicular oocytes to ROS inhibits oocytes maturation to metaphase-II stage and increase the oocytes degeneration. Also, we speculated that increased ROS level may trigger tPA and tPA-PAI activities in porcine oocytes matured in vitro.
        4,000원
        10.
        2011.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        4,000원
        11.
        2010.12 KCI 등재 구독 인증기관·개인회원 무료
        The mannanase, cellulase and xylanase-producing thermophilic bacteria, designated EJ3, was isolated from fresh spent mushroom (Pleurotus eryngii) substrates taken from the DOJUN farm located in Keyongnam, Korea. The isolate EJ3 was facultatively anaerobic and grew at temperature ranging from 20℃ to 60℃ with an optimal temperature of 37℃. The DNA G+C content of the isolate EJ3 was 45 mlo%. The major fatty acids were anteiso-15:0 (38.9%), 17:0 (7.4%), and iso-15:0 (38.2%). The 16S rRNA gene sequence similarity between the isolate EJ3 and other Bacillus strains varied from 97% to 99%. In the phylogenetic analysis based on these sequences, the isolate EJ3 and Bacillus subtilis clustered within a group and separated from other species of Bacillus. Based on the physiological and molecular properties, the isolate EJ3 was classified within the genus Bacillus as Bacillus subtilis EJ3. The optimal growth condition of B. subtilis EJ3 were pH 6.0 and 55℃, respectively.
        12.
        2010.12 KCI 등재 구독 인증기관·개인회원 무료
        This study was conducted to evaluate the feeding value of the spent mushroom (Pleurotus eryngii) substrates (SMS) in laying hens (Hy-Line Brown). The fresh spent mushroom (Pleurotus eryngii) substrates collected from the DOJUN farm were fermented with Bacillus subtilis EJ3 for 2 weeks. A total of twenty-four laying hens were fed corn-soy based experimental diets containing 0% (control), 5% (T1), 10% (T2) and 15%(T3) fermented SMS for 7 weeks. There were no significant differences among the treatments in egg production, egg weight, egg mass, feed conversion and viability during the experimental period. Feed intake was significantly lowered in control (118.3 g) than T1 (121.9 g), T2 (120.3 g) and T3 (122.4 g). There were no significant differences among the treatments eggshell breaking strength, thickness and haugh unit, whereas the yolk color of T1, T2 and T3 were significantly heavy than T0. The palatability of boiled meat was significantly better in the T3 laying hens than in the T0 laying hens. In conclusion, fermented SMS can be used as resource of feed in laying hen feed at 5.0-15% level without effect on performance and egg qualify.
        15.
        2008.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Based on my teaching experience in the Art colleges, I found potential usages of a game engine as a tool for fine art. This paper will provide new way to use game engine; Making a Virtual Art Gallery with a real-time 3D rendering game engine and Making a Draft movie for a 3D Animation in postproduction using a real-time 3D rendering game engine. This paper will also provide the case study of various projects draft movie for a 3D animation with Real-time 3D Rendering Game Engine. This study will provide new possibility of game engine.
        4,000원
        18.
        2017.09 서비스 종료(열람 제한)
        This study aimed to analyze difference in clinical findings, including coronary artery complications, in patients with Kawasaki disease and respiratory symptoms with several respiratory infections. We studied 182 pediatric patients diagnosed with Kawasaki disease. Examinations for respiratory viral polymerase chain reaction were conducted in the group of patients with respiratory symptoms. Echocardiography was perfomed by a pediatric cardiologist, and laboratory findings were evaluated. Clinical manifestations and laboratory findings based on medical records were compared. There were no differences between patients with and without respiratory viral infections with respect to age, male-female ratio, coronary artery complications, Kawasaki disease-specific clinical manifestations, duration of fever, duration of hospitalization, or recurrence rate. There was a significant difference in C-reactive protein levels (55.6 vs. 73.9 mg/L) between the two groups, but the other laboratory findings. The rate of respiratory infections in pediatric patients with Kawasaki disease was similar to those reported in previous studies, and clinical manifestations and laboratory findings were not significantly different between the groups.
        19.
        2016.12 서비스 종료(열람 제한)
        Diagnosis of scrub typhus is difficult because of its unspecific symptoms. The authors studied the correlation between serum adenosine deaminase (ADA) levels and scrub typhus, with the aim of aiding diagnose of the disease. The medical records of 64 children, who visited Wonkwang University Hospital from 2005 to 2015 for fever of undetermined origin, were analyzed retrospectively. Serum ADA levels were measured and indirect immunofluorescence antibody (IFA) assays were conducted. The patients were divided into two groups based on diagnosis of scrub typhus. Of 64 febrile patients, 39 were confirmed to have scrub typhus. Mean serum ADA level in the scrub typhus group (58.54±2.82 IU/L) was significantly higher than that in the non-scrub typhus group (29.30±4.03 IU/L, p<0.05). In the 25 non-scrub typhus patients, mean serum ADA level was significantly higher (50.24±8.52 IU/L) in patients with Mycoplasma infection than that in those with other diseases (19.46±1.39 IU/L, p<0.05). The study shows that in patients with only fever who are difficult to diagnose, serum ADA levels substantially aid the diagnosis of scrub typhus. Ed:- please consider carefully
        20.
        2013.07 서비스 종료(열람 제한)
        Our study is performed to confirm the level of genetic diversity and population structure with 80 maize inbred lines (40 waxy inbred lines and 40 flint inbred lines) and to explain the genetic basis of agronomic traits using an association mapping. The 200 SSR loci are confirmed a total of 1,610 alleles in total 80 maize inbred lines. The average number of alleles per locus was 8.05. The average GD was 0.72. The average PIC value was 0.68. The average MAF was 0.40. Population structure was revealed for K=2. Total 80 maize inbred lines were divided by groups I, II and admixed group. The 14 waxy inbred lines were assigned to group I. The 45 inbred lines include 5 waxy inbred lines and 40 flint inbred lines were contained to group II. The 21 waxy inbred lines were contained in the admixed group with lower than membership threshold 0.8. Association mapping between 200 SSR markers and 10 phenotypic traits of waxy/flint maize inbred lines were performed by Q GLM and Q+K MLM. In significant level at 0.01, 72 SSR markers were associated with 10 phenotypic traits using Q GLM. The 4 marker-trait association were detected in Q+K MLM. The results derived from this study will be used for designing efficient new maize breeding programs.
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