• Weed & Turfgrass Science
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• 제3권4호
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• pp.354-361
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• 2014

This study was conducted to investigate whether several composted liquid manures (CLMs) are useful for biological control of large patch on zoysiagrass and investigate the chemical and biological factors to suppress large patch in soil treated with CLMs. The CLMs were produced at 4 different facilities for livestock excretion treatments located in Korea. Field experiments were carried out at 5 golf courses located near each facility. CLM and Chemical fertilizer (CF: water soluble fertilizer, 20-20-20) were applied four and three times with N at $12g\;m^{-2}$ per year, respectively. There was significant increase of concentration of K, Na, and Cu of soil treated with CLM compared to CF treatment. Among experimental plots, CN and GG2 plot sites were shown significant higher effect of biological control 80% and 50% respectively against large patch disease. The number of bacteria, Actinomycetes, and fungi in soil at these sites significantly increased and fluorescein diacetate hydrolytic activity was enhanced, while the soil was treated with CLM. The results of this study demonstrated that CLM application has effect on soil to suppress large patch and reduce the use of fungicide in environment-friendly turf management.

• 한국토양비료학회지
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• 제47권6호
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• pp.533-539
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• 2014

Mine wastes such as acid mine drainage (AMD) can cause the detrimental effects on surrounding environment, thereby eventually threatening human health. Main objective of this study was to evaluate the neutralizing effect of fly ash (FA) as a stabilizing material AMD. Field plot was constructed in a coal waste depot which has caused aluminium-whitening adjacent to the stream. Different mixing ratios of FA were applied on a top of the soil, and then the physicochemical properties of runoff and soil were monitored. Constructed plots were as following: control (mine waste only (W)), mine waste + 20% ($w\;w^{-1}$)of FA (WC20M), mine waste + 40% ($w\;w^{-1}$)of FA (WC40M), and WC40M dressed with a fresh soil at the top (WC40MD). Result showed that initial pH of runoff in control was 5.09 while that in WC40M (7.81) was significantly increased. For a plot treated with WC40M, the concentration of Al in runoff was decreased to $0.22mg\;L^{-1}$ compared to the W as the control ($4.85mg\;L^{-1}$). Moreover, the concentration of Fe was also decreased to less than half at the WC40M compared to the control. Application of FA can be useful for neutralizing AMD and possibly minimizing adverse effect of AMD in mining area.

• 농업과학연구
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• 제35권2호
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• pp.127-136
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• 2008

곤충병원성 곰팡이인 Beauveria bassiana는 미생물 살충제로서 다양한 해충들을 방제하는데 사용해오고 있다. 최근에 B. bassiana TBI-1균주가 두점박이응애, 온실가루이에 살충효과가 있는 것으로 보고되었다. 생물학적 방제 인자인 B. bassiana TBI-1를 목화진딧물에도 어느 정도의 살충활성을 나타내었다. B. bassiana TBI-1 균주를 처리한 후 일주일 동안 평균 진딧물의 증가율은 0.21로 나타났으나 처리하지 않은 대조군에서는 0.24의 증가율로 약간 높게 나타나 보였다. 이러한 결과에서 백강균의 처리구에서 진딧물의 평가 증가율이 0.03 낮게 나타나는 것을 알 수 있었다. 또한 오이 잎에 B. bassiana TBI-1 균주에 의하여 붉은빛 곰팡이의 형태로 죽은 진딧물의 죽은 흔적을 육안으로 확인할 수 있었다. 적정농도로 B. bassiana TBI-1을 처리하면 목화진딧물의 개체군 증가율을 현저히 감소시킴으로 효과적으로 진딧물을 방제할 수 있을 것이다.

• Asian-Australasian Journal of Animal Sciences
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• 제9권6호
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• pp.655-665
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• 1996

The effects of feeding rice bran and beet pulp mixtures on the site and extent of digestion and microbial synthesis in fattening steers were studied. Three Holstein steers fitted with ruminal, duodenal and ileal cannulas were fed four diets in a $4{\times}3$ Youden square design. The four diets consisted of 15% Italian ryegrass hay and 85% concentrate as a control diet which included 72% rolled barley, 20% rice bran plus 40% beet pulp, 30% rice bran plus 30% beet pulp or 40% rice bran plus 20% beet pulp. All diets provided 1.8 times digestible energy required for maintenance. The digestibility of fat in the small intestine (% of flow) showed an increase with rice bran content among the by-product diets. Digestibility of structural carbohydrate both in the rumen and the whole digestive tract decreased linearly with rice bran content. The digestibility of nonstructural carbohydrate was not affected by rice bran content, but that of nonstructural, nonstarch polysaccharides was higher in the rumen and lower in the large intestine for the by-product diets than for the control diet. A rice bran content of more than 30% in the by-product diets severely inhibits ruminal microbial synthesis and digestible energy intake in fattening steers.

• Journal of Korean Biological Nursing Science
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• 제19권3호
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• pp.141-150
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• 2017

Purpose: The purpose of this study was to investigate the effects of the Korean Dietary Approaches to Stop Hypertension (DASH) education program on oxidative stress, antioxidant capacity, and serum homocysteine (Hcy) level in elderly Korean women. Methods: This was a quasi-experimental study employing non-equivalent control group pretest-posttest design. The DASH group (n= 27) underwent the DASH education program for 12 weeks, whereas the control group (n= 21) was provided one education session. The survey was conducted before and after the intervention period. Results: In DASH group, monounsaturated fatty acid (MUFA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) intakes significantly increased after the intervention as compared to prior to the intervention. No significant differences were found in the control group. After the intervention, thiobarbituric acid reactive substance (TBARS) and Hcy levels significantly decreased in the DASH group but not in the control group. Conclusion: The DASH education program was effective in reducing oxidative stress and Hcy levels in elderly Korean women.

• Journal of Korean Biological Nursing Science
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• 제13권2호
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• pp.102-108
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• 2011

Purpose: The purpose of this study was to examine the effects of first clinical training on stress, anxiety and changes in autonomic nervous system in nursing students. Methods: Seventy-four nursing students were assigned to the experimental group (n=36) that had two weeks of clinical training, and the control group (n=38) that had only two weeks of regular classes. Perceived stress, state anxiety and heart rate variability (HRV) were measured at the beginning and end of the experiment. Results: Perceived stress in the experimental group was significantly higher than in the control group. However, State anxiety was not significantly different between the two groups. All indices of HRV except LF/HF ratio were significantly different between the two groups. LF norm in the experimental group was significantly higher than in the control group, and HF norm in the experimental group was significantly lower than in the control group. Conclusion: Based on these results, it can be suggested that clinical training increases the perceived stress and affects the changes in autonomic nervous system in nursing students.

• Applied Biological Chemistry
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• 제51권4호
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• pp.294-298
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• 2008

Effects of endosulfan (EN), an insecticide, and bleomycin (BL), an antibiotic, on the body weight in the normal mice, and the in vivo cell growth, tumor weight, and hematological parameters of the Ehrlich ascites carcinoma (EAC) cell-bearing Swiss albino mice Mus musculus were evaluated. EN and BL were respectively administered orally and intraperitoneally to the experimental mice; the control group consisted of EAC cell-bearing untreated mice only. EN reduced the body weight in normal mice, whereas BL resulted in a steady body weight compared to the control. EN increased the EAC cell count significantly by reducing the growth of normal viable cells. In contrast, BL reduced the cell count by increasing the proportion of viable cells in the body. The tumor weights induced by EN were significantly higher than those of the EAC control and the BL-treated animals. In comparisons with the control and the BL mice, hematological parameters such as hemoglobin (%) and the number of RBC and lymphocytes were lowered, while counts of WBC, neutrophils, and monocytes were elevated after EN treatments. These results show that BL is capable of reducing the EN-induced neoplastic and haematological alterations in the mice under laboratory conditions.

• Journal of Korean Biological Nursing Science
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• 제17권3호
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• pp.271-276
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• 2015

Purpose: This study was to evaluate the effects on the heart rate and respiration rate of preterm infants when providing auditory stimulation on them. Methods: The design of this study was a nonequivalent control group pretest-posttest design in a quasi experimental study. Forty preterm infants were assigned to experimental and control groups : 20 in the auditory and 20 in the control group. The data were collected from May 2014 to October. The auditory stimulation was created by using an audio music tape provided 20-minute per day for 7 consecutive days. In data analysis, SPSS WIN 21.0 program was utilized for descriptive statistics, repeated measurement anova and Mann-Whitney. Results: General characteristics of the two groups showed no significant differences, thus two groups were found to be homogenous. There were no significant differences in heart rate and respiration rate between the auditory and control groups. Conclusion: The effect of auditory stimulation for 7 days was not effective in decreasing heart rate or respiration rate in premature infants. Therefore, the type and length of music therapy must be developed for the improvement of vital signs in preterm infants who were hospitalized in a neonatal intensive care unit.

• 한국균학회지
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• 제26권1호통권84호
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• pp.78-85
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• 1998

전국 각지에서 채집한 사멸곤충에서 분리한 곤충 기생성 진균이 생산하는 살충성 생리활성물질을 탐색한 결과 곰팡이 분리주 CNAB-63 균주가 목화진딧물과 점박이응애 모두에 대해 다른 분리균주들보다 비교적 높은 살충효과를 보인 바, 본 균주가 생산하는 살충성분을 각종 chromatography로 분리 정제하였다. 정제된 활성물질 CNAB는 점박이응애에서 66.59%, 목화진딧물에서 52.96%의 살충효과를 보였으며, 그 외에도 온실가루이에 살충효과를 보였으나 배추좀나방에는 미미한 살충효과를 보였다. 한편 활성물질 CNAB는 $100\;{\mu}g/disk$ 농도에서 곰팡이, 효모, 세균류에 전혀 항균활성을 보이지 않았다.

• Journal of Korean Biological Nursing Science
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• 제21권4호
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• pp.318-325
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• 2019

Purpose: The purpose of this study was to identify the effects of a finger guard developed to prevent sharp injuries in nursing students. Methods: This study was an equivalent control group posttest design. Seventy nursing students were randomly allocated to either the experimental group (n= 35) or the control group (n= 35). The finger guard was used whileopening the glass ampoule in the experimental group. The outcome variables such as sharp injuries, anxiety and user satisfaction were measured. Results: Sharp injuries were 0 in the experimental group and 2 in the control group (p= .160). Anxiety in the experimental group was significantly lower than the control group (p< .001). User satisfaction was 4.33 score in the range from 1 to 5, the highest item was the weight (4.63), followed by effectiveness (4.51). Conclusion: Using a protective device while opening the glass ampoule was observed to be effective in reducing anxiety among the nursing students, and exhibited protection of skin.