Kim, J.G.;Chung, E.S.;Kang, W.S.;Ham, J.S.;Kim, J.D.;Seo, S.;Lee, J.K.
Journal of The Korean Society of Grassland and Forage Science
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v.19
no.2
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pp.115-120
/
1999
This experiment was carried out to investigate the effects of additives on the quality of alfalfa(Medicago sativa L.) silage at the forage experimental field, National Livestock Research Institute, RDA, Suwon in 1996. The experiment was arranged in a randomized block design with three replications. The treatments consisted of different additives(control, formic acid, molasses, inoculant A and inoculant B). Crude protein(CP) and Nitrogen free extract(NFE) content of alfalfa silage with additives were higher compared with those obtained control, but Crude ash(CA) and Crude fiber(CF) content of control(11.5 and 39.6%) were higher than those of additive treated plots. ADF and NDF contents of control silage were the highest as 36.2 and 48.6%, respectively, and increased by 4% compared with those obtained before ensiling. The acidity(pH) of control was the highest(5.45), but the lowest in inoculant A(4.32). Inoculant teratment significantly reduced acidity of silage compared with control. DM content of control silage was the lowest but DM loss of control silage was higher than that of additive treated silage. Ammonia-N content was the highest at formic acid treatment and level of Lactobacillus was decreased at control and formic acid treated silage. Total organic acid and lactic acid content of inoculant A and inoculant B were higher than those of other treated plots. The results of this study indicate that the treatment of LAB(Lactic acid bacteria) could be recommended as producing high quality of alfalfa silage.
Extravasation of toxic chemotherapeutic agents cause severe skin ulceration and necrosis which often need secondary surgical intervention. Still, there were not established antidote agent in case of extravasation with mitomycin-c. Dimethyl sulfoxide is known as an effective chemical scavenger of toxic hydroxyl free radical and sodium thiosulfate also was demonstrated significant protector from mitomycin-c induced ulceration by a few experimental studies. Author investigated necrotic area of mitomycin-c injected site and compare to the effectiveness of topical treatment with dimethyl sulfoxide and intradermal injection of sodium thiosulfate according to starting times, forty five mice were divided into 3 groups. Control group(n=5) had no treatment after subcutaneous injection of mitomycin-c. Experimental group I and II were 20 mice treated dimethyl sulfoxide and sodium thiosulfate, respectively. Depending on the starting time of treatment, group I and II were subdivided into 1, 2, 3 and 4 as immediate, 6 hours, 12 hours and 24 hours after mitomycin-c injection. Histologic studies of the necrotic area and survival area after treatment were performed using hematoxylin-eosin staining. The mean necrotic area of group I was significantly decreased depending on the starting time of treatment compared with control group(p<0.01). The results means there was no necrosis area which was treated with topical sodium thiosulfate within 6 hours, and it showed also significant decrease of necrosis area within 24 hours. There was also no necrosis area in group II-1 and significant decrease of necrosis area II-2 and III-3. But, effctiveness of intradermal injection of sodium thiosulfate was not found in group II-4 which was started after 24 hours. Hisotolgic findings showed a bland coagulative necrosis without inflammatory changes and no granulation tissue. The significant difference that cytoplasmic loss of subcutaneous fat and decrease number of hair follicles between two groups resulted from the methods of treatment by topical application and intradermal injection. In conclusion, immediate treatments with topical dimethyl sulfoxide or intradermal injection of sodium thiosulfate signifcantly prevents necrosis by extravasation of mitomycin-c.
A series of four in vitro experiments were conducted to evaluate condensed molasses solubles (CMS) as a source of nitrogen for ruminal microbes. In experiment 1, as compared with urea, the value of CMS as a nitrogen source was examined. In experiment 2, to determine the time needed for maximal response of microbial synthesis, the treatments were incubated for increasing times (from 6 h to 16 h). Because a sediment that was assumed to cause nitrogen loss was found after incubation in experiments 1 and 2, it was decided to avoid formation of sediment using sugar instead of molasses or a shorter time incubation (experiments 3 and 4). Furthermore, in experiment 4, because the extent to which ammonia nitrogen is released from CMS and urea before 6 h of incubation was uncertain, it was decided to examine the peaks of concentrations of ammonia nitrogen released from CMS and urea by sampling after 2 h incubation. There was no significant difference in the concentration of microbial-N between molasses/CMS and molasses/ urea treatments in experiment 1, although there were greater decreases in ammonia concentration with the molasses/CMS treatment. The microbial protein synthesis was increased progressively until 10 h for both treatments (experiment 2). Although ingredients that were completely soluble (sucrose, urea) were used in experiment 3, the sediment was still evident suggesting that the sediment was largely of microbial not feed origin. Ammonia release from CMS was much faster than from urea during 2 h incubation. In conclusion, the results of the present studies suggest that the feed value of CMS as a source of nitrogen for ruminal bacteria was similar to that of urea when it was estimated in vitro.
Journal of Korean Society for Atmospheric Environment
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v.24
no.2
/
pp.196-205
/
2008
Variability in vertical ozone and meteorological profiles was measured by 2Z electrochemical concentration cells (ECC) ozonesonde at Bangyi in Seoul ($37.52^{\circ}N$, $127.13^{\circ}E$) during June $6{\sim}9$, 2003 in odor to identify the vertical distribution of ozone and its relationship with the lower-atmospheric structure resulted in the high ozone concentrations near the surface. The eight profiles obtained in the early morning and the late afternoon during the study period clearly showed that the substantial change of ozone concentrations in lower atmosphere(${\sim}5\;km$), indicating that it is tightly coupled to the variation of the planetary boundary layer (PBL) structure as well as the background synoptic flow. All profiles observed early in the morning showed very low ozone concentrations near the surface with strong vertical gradients in the nocturnal stable boundary layer due to the photochemical ozone loss caused by surface NO titration under very weak vertical mixing. On the other hand, relatively uniform ozone profiles in the developed mixing layer and the ozone peaks in the upper PBL, were observed in the late afternoon. It was noted that a significant increase in ozone concentrations in the lower atmosphere occurred with the corresponding decrease of the mixing height in the late afternoon on June 8. Ozone in upper layer did not vertically vary much compared to that in PBL but changed significantly on June 6 that was closely associated with the variation of synoptic flows. Interestingly, heavily polluted ozone layers aloft (a maximum value of 115 ppb around 2 km) were formed early in the morning on 6 through 7 June under dominant westerly synoptic flows. This indicates the effects of the transport of pollutants on regional scale and consequently can give a rise to increase the surface ozone concentration by downward mixing processes enhanced in the afternoon.
Seo, Young-Jin;Kim, Jong-Su;Kim, Chang-Bae;Park, Man;Lee, Dong-Hoon;Choi, Choong-Lyeal;Choi, Jung
Korean Journal of Soil Science and Fertilizer
/
v.35
no.3
/
pp.162-168
/
2002
The silica uptake of rice plant(Oryza sativa L.) and a potential capacity of paddy soil as a source of silica supply for rice plant was studied under field experimental condition. Amount of Si from irrigation water, rainfall, which was a source of silica supply, and percolating rate of water through paddy soil profile as a source of silica loss from paddy soil, was investigated. Rice plants were grown in three different conditions, which included Control as non-fertilized, RDA's recommandation(NPK, Urea-Fused phophate-Potassium chloride=$110-45-57kg\;ha^{-1}$) and RDA's recommandation with supplement of silicate fertilizer(NPK+Si, Urea-Fused phosphate-Potassium chloride+Si=$110\;N-45\;P_2O_5-57\;K_2O+267.2\;Si\;kg\;ha^{-1}$). An amount of silica supply from rainfall was $0.5kg\;ha^{-1}$ and average amount of silica supplied from irrigation water $42.5kg\;ha^{-1}$, ranging from $28.1kg\;ha^{-1}$ to $58.8kg\;ha^{-1}$. Silica amount percolated through the soil profile have uniform trend comparatively showing $62.9kg\;ha^{-1}$ in Control, $64.8kg\;ha^{-1}$ in NPK treatment and $62.9kg\;ha^{-1}$ in NPK+Si treatment. Silica uptaked by Rice plant was $335.6kg\;ha^{-1}$ in Control, $406.6kg\;ha^{-1}$ in NPK+Si treatment and $471.1kg\;ha^{-1}$ in NPK+Si treatment. The difference between an amount of Si input(from rainfall, irrigation water and silicate fertilizer) and an amount of Si output(percolated Si in soil, uptaked Si by rice plant) was $357.4kg\;ha^{-1}$ in control, $412.1kg\;ha^{-1}$ in NPK treatment and $238.2kg\;ha^{-1}$ in NPK+Si treatment. Results of our study imply that paddy soil is a potential pool as a source of Si supply during growing periods of rice plant.
This study was conducted in the sandy loam soil to find out the effects of fly ash and zeolite applications on saving of irrigation water which was required great quantities during the cultivation days of dry seeded rice. Total water loss was reduced so rapidly in the early growth stage that n was the least in the 18th day after irrigation. After that day it was increasd due to the growth development and the rising temperature. In the daily mean of decreasing water level during the whole irrigation days, control was 47.7mm but the treatments of fly ash and zeolite were 31.8mm and 35.8mm respectively Amounts of the presumed irrigation water of fly ash and zeolite treatments were lower about 29.1% and 20.9%. respectively than that of control during the whole irrigation days These gaps between control and amendment treatments were greater in the early growth stage than in the late stage Hardness, bulk density and the ratio of solid phase in the soil after experiment were the highest in the fly ash treatment and those of control and zeolite treatments were showed the same trends each other. Amounts of water percoration of control and zeolite treatments in the soil were increased 8.2% and 2.6% respectively in comparision with those in the soil after amendment application, but that of fly ash treatment was decreased 42.5%, In contrast to the water percoration of control in the soil after experiment, those of fly ash and zeolite treatments were decreased 76% and 32%.
Journal of the Korean Society of Food Science and Nutrition
/
v.43
no.10
/
pp.1510-1518
/
2014
This study investigated the effects of calcium citrate on papain-induced osteoarthritis in C57BL/6J mice. Osteoarthritis was induced by injecting $6{\mu}L$ of papain into the knee joints of mice. Calcium citrate was made by crushing the centrifuged precipitate after reacting 0.5 M citric acid with 1 kg of oyster shell extract. The mice were divided into five groups (n=8). The normal group was untreated, whereas the papain group was induced to have osteoarthritis and treated with $200{\mu}L$ of water per day. The papain+DS group was treated with diclofenac sodium. The papain+calcium citrate groups were treated with calcium citrate at 150 and 300 mg/kg/bw for 28 days. Proteoglycan contents in articular cartilages were measured by safranin O/fast green staining and hematoxylin & eosin staining. Histopathological changes in cartilages were analyzed by the Rudolphi score approach. Contents of pro-inflammatory cytokines including TNF-${\alpha}$, IL-$1{\beta}$ and IL-6 in plasma, were measured by the ELISA method. Body weights among the treated groups were not significantly different compared with that of the normal group. Cartilage loss and joint instability in the calcium citrate group improved significantly (P<0.05) in a dose-dependent manner compared with the papain group. Further, proteoglycan content of the calcium citrate group was considerably (P<0.05) higher than that of the papain group. Osteoarthritis scores in the calcium citrate group were considerably (P<0.05) reduced compared with the papain group. In the group treated with calcium citrate, contents of TNF-${\alpha}$, IL-$1{\beta}$ and IL-6 in plasma were significantly (P<0.05) reduced in a dose-dependent manner in comparison with the normal group. Based on these results, we suggest that calcium citrate is effective for treatment of osteoarthritis.
Park, Chi-Bong;Kim, Hwi-Yool;Jeun, Sin-Soo;Han, Young-Min;Han, Duk-Young;Kang, Young-Woon;Choe, Bo-Young
Progress in Medical Physics
/
v.14
no.4
/
pp.259-267
/
2003
In vivo $^1$H magnetic resonance spectroscopy (MRS) at 4.7 T was applied to investigate the cerebral metabolite changes of mice brain before and after experimental brain trauma. In vivo $^1$H MR spectra were acquired from a voxel covering right parietal cortex in normal brain, used as control subjects. After experimental brain trauma using the fluid percussion injury (FPI) method, $^1$H MR spectra were acquired from the same lesion three days after trauma. Metabolite ratios of the injured lesion were compared to those of controls. After trauma, N-acetylaspartate (NAA)/creatine (Cr) ratio, as a neuronal marker was decreased significantly versus controls, indicating neuronal loss. The ratio of NAA/Cr in traumatic brain contusion was 0.90$\pm$0.11, while that in normal control subjects was 1.13$\pm$0.12 (P=0.001). Choline (Cho)/Cr ratio had a tendency to rise in experimental brain contusion (P=0.02). Cho/Cr ratio after trauma was 0.91$\pm$0.17 while that before traumas was 0.76$\pm$0.15. Cho/Cr ratio was increased and this might indicate a inflammatory activity. However, no significant difference of [(glutamate+glutamine) (Glx)]/Cr was established between experimental traumatic brain injury models and normal controls. Lactate (Lac)/Cr ratio was appeared as a sign of shifted posttraumatic energy metabolism and increased versus controls. These findings strongly suggest that in vivo $^1$H MRS may be a useful modality for clinical evaluation of traumatic contusion and could aid in better understanding the neuropathologic process of traumatic contusion induced by FPI. In the present study, in vivo $^1$H MRS was proved to be a useful non-invasive method for in vivo diagnosis and monitoring of posttraumatic metabolism in models of brain contusion.
This study evaluated the change of color and the microhardness according to time-out using the office bleaching with in vitro test after bleaching one time 1 day per week, total three times, for the control group and three times per 1day for the experimental group. $L^*$ was increased in both groups. Group 1 showed a significant increase statistically between before and after tooth whitening (p<0.05). Group 2 showed a significant increase statistically between before and after tooth whitening (p<0.05). ${\Delta}E^*$ was huge in both groups. In group 1, it was great in terms of statistical significance between 1 day and 7 days after tooth whitening (p<0.05). In group 2, it was the greatest between before and 1 day after tooth whitening and was significant statistically as well (p<0.05). Vickers hardness number (VHN) decreased in both groups. In group 1, VHN decreased over time and the difference was significant statistically (p<0.05). In group 2, VHN decreased over time and the difference was significant statistically (p<0.05). Percentage microhardness loss was great in both groups. In group 1, it was the greatest between 1 day and 7 days after the treatment, and it was significant statistically (p<0.05). In group 2, it was the greatest between before and 1 day after the treatment, and it was significant statistically (p<0.05). Put together, the more frequent tooth whitening a day is, the longer the period of tooth whitening when applying the same frequency, the greater color change was, however the microhardness decreased, in regard to the results over time using 15% hydrogen peroxide tooth whitening product for professionals.
A pot Experiment and a field investigation were carried out in order to obtain some information on the ammonia volatilization and nitrogen absorption by paday rice plants in relation to the potassium application and roots growth. Results obtained were as follows ; 1. Urea application to the polt where potassium was added and rice plant was grown increased the ammonia volatilization at the beginning, but in the latter stage, the volatilization gradually decreased below that of no potassium plot. 2. Total nitrogen absorbed by rice plant, however, was much greater from the potassium added plot than no potassium and pH of the wet soil was lower in the former treatment than in the latter. 3. The application of urea presumably caused greater raise of soil pH and higher ammonia valatilization from the potassium added plot than the no potassium at the beginning, but the active growth of plants and raveneous absorption of N by the plants at the later stage of plant growth resulted in lower ammonia volatilization and lower pH in the potassium added plot than no potassium plot. 4. When the penetration of rice roots was restricted, pH of the wet soil was lower in the plot where potassium added than no potassium, and so was the ammonia volatilization. 5. Under high pH condition of paddy soil, a heavier basal application of potassium chloride or potassium sulfate may reduce the ammonia volatilization particulary in the early growth period of paddy rice when the nutrient absorption by plant is insignificant. However, under an acid normal soil, it may cause ammonia loss through raise of soil pH at the early growth of paddy rice.
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