• Title/Summary/Keyword: control period

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The Influence of Germinations in Soaking Treatment of Rhus chinensis, Lespedeza cyrtobotrya and Lespedeza cuneata (붉나무.참싸리.비수리 종자의 침지 처리가 발아에 미치는 영향)

  • Hur, Young-Jin;Kim, Min-Ho;Cha, Go-Woon;Ahn, Tae-Young
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.13 no.2
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    • pp.42-51
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    • 2010
  • Herbs and shrubs are employed for environmental restoration purposes. Among common herbs and shrubs, few species with low germination rates were selected and studied for enhanced germination rates and decreased germination times via soaking treatment. Rhus chinensis, incubator grown samples treated with the bacterial solution for 72hrs followed by immediate seeding showed the highest germination rate of 26.7% and germination period of 5.7 days, 3 days decrease from the control. Treatment of distilled water (t=3.79, p<0.01), nutrient broth (t=4.44, p<0.00) and bacterial solution (t=4.42, p<0.00) showed highly significant difference. In the case of soil tests, treating in the nutrient broth for 72 hrs followed by immediate seeding yielded the the highest germination rate of 23.3% with 7.3 days to initial germination, a decrease of 14.7 days with respect to the control. All the samples followed by immediate seeding showed significant difference (t=2.13, p<0.05). Incubator grown samples of Lespedeza cyrtobotrya showed different results. The incubator samples suspended for 48 hrs in distilled water followed by immediate seeding and 1 day drying displayed the highest germination rate of 96.7%, surpassing that of the control by 33.4%. The incubator samples treated with the distilled water and nutrient broth showed enhanced germination. But only the samples treated with distilled water and nutrient broth for 48hrs showed the increased germination in soil tests. All the sample treated for 24 hrs followed by immediate seeding or dried for 1 day showed initial germination as early as 1 day in incubator. The initial germinations were shortened in the samples treated with distilled water and nutrient broth for 48hrs in soil tests. Lespedeza cuneata incubator sample treated with nutrient broth for 24 hrs and dried for 1 day exhibited the highest germination rate of 83.3%, a 31.1% improvement over the control. The incubator samples treated with distilled water for 48 hrs (t=4.20, p<0.01) showed effective increase of germination. The treatment of distilled water (t=2.96, p<0.05) and bacterial solution (t=2.24, p<0.05) showed significant difference. The germination rates in soil were less than those of incubator and the control. The incubator samples treated with distilled water and bacterial solution displayed 1 day germination period, shortened by 1.3 days compared to the control. For soil grown samples, the samples treated with distilled water showed delayed initial germination and those treated with nutrient broth for 48hrs and bacterial solution for 72hrs shortened initial germination.

The Evaluation of Early Growth Pattern of Miscanthus sacchariflorus after Cutting and Burning in the Woopo Wetland (우포늪 물억새 (Miscanthus sacchariflorus) 군락에서 생장초기에 잘라주기와 태워주기에 따른 성장변화)

  • Kim, Gu-Yeon;Lee, Chan-Woo;Joo, Gea-Jae
    • Korean Journal of Ecology and Environment
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    • v.37 no.2 s.107
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    • pp.255-262
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    • 2004
  • Growth patterns after the cutting and burning of Miscanthus sacchariflorus community were analyzed in the Woopo Wetland. Three replicates of 5 ${\times}$ 5 m plot of control, burning, and cutting treatments were established in April 2003 and changes of growth pattern were monitored by August 2003. In the control, burning, and cutting plots, a total of 7 families and 8 species, 14 families and 18 species, 6 families and 8species were observed respectively. Burning plot showed high diversity of flora. However, high diversity declined after July and all plots showed a similar species diversity. Vine plant, Humulus japonicus, dominated in the burning plots. Change of shoot density was highest in the early period in the burning plots (176/$m^2$) and shoot density in early May was almost double of the control and cutting plots. Toward to the end of active growth period (August), shoot density in cutting plot (170 ${\pm}\;7/m^2$)was higher than that of burning plots (141 ${\pm}\;9/m^2$). Shoot length of the cutting, burning, and control plot was 205 ${\pm}$ 15 cm, 190 ${\pm}$ 17 cm, and 187 ${\pm}$ 6 cm (n> 100) respectively. Above- ground biomass of cutting plots was higher than that of burning and control plots. Above- ground biomass of cutting plot was 1.6 times higher than the control while burning plot showed 1.4 times. This study indicted that cutting of Miscanthus sacchariflorus community increase shoot density development, length growth, and above- ground biomass.

EFFECTS OF COMPRESSION ON DISTRACTED AREA DURING MANDIBULAR DISTRACTION IN RABBITS (가토에서 하악골신장술시 신장부에 대한 가골압축의 효과)

  • Park, Hong-Ju;An, Jin-Suk;Kook, Min-Suk;Oh, Hee-Kyun;Ryu, Sun-Youl;Cho, Jin-Hyoung
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.29 no.1
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    • pp.1-9
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    • 2007
  • Purpose: To evaluate the effect of compression on the distracted area in new bone formation during mandibular distraction osteogenesis in rabbits. Materials and method: Sixteen rabbits, weighing approximately 2 Kg, and the prefabricated distraction device were used. With the rabbits under general anesthesia, we performed vertical osteotomies between the anterior and posterior mandibular teeth and then placed the distraction device. After a 5 -day latency period, the mandible was distracted to a length of 10.0 mm at a rate of 1 mm/day and then immediately compressed 4 mm in the experimental group (n=8). In the control group (n=8), the mandible was distracted to a length of 6.0 mm at a rate of 1 mm/day. Rabbits in the control group were killed at 2 and 8 weeks during the consolidation period. The specimens were evaluated with light microscope after H & E stain. Histomorphometric analysis was done at 8 week specimens. Results: All experimental animals showed mandibular elongation on the macroscopical and radiographic evaluations. At 2 week, immature bone formation was observed from the surface of the host bone margins with collagen fibers arranged parallel to the direction of distraction in the control group; in the experimental group, immature bone formation was observed adjacent to the host bone, and the collagen fibers were not arranged uniformly. At 8 week, spindle-shaped new bone formation was seen in the direction of distraction in distracted area of the control group, while in the experimental group, the newly formed bone was arranged in a multidirectional manner, like the pattern of trabeculae. In the histomorphometric analysis of 8 weeks, the area of bone deposition was $2.12{\pm}\;0.75\;inch^2$ in the experimental group and $0.87{\pm}0.51\;inch^2$ in the control group (p<0.01). The bone deposition ratio was $29.60{\pm}10.50%$ in the experimental group and $12.10{\pm}7.17%$ in the control group (p<0.01). Conclusion: These results suggest that compression after over-distraction during the mandibular distraction osteogenesis is an effective method of increasing the amount of newly formed bone in distracted area.

A Clinical Study of the Effect of Periodontitis-Medical Gel on Human Gingivitis and Periodontitis (수용성 Periodontitis-Medical Gel이 치은염, 치주염에 미치는 영향)

  • Chai, Jung-Kiu;Choi, Jae-Seong;Park, Ji-Sook;Suh, Jong-Gin;Choi, Seong-Ho;Cho, Kyoo-Sung;Kim, Chong-Kwan
    • Journal of Periodontal and Implant Science
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    • v.30 no.1
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    • pp.11-27
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    • 2000
  • The purpose of this study was to evaluate the clinical effects of Dipotassium glycyrrhizinate, Allantoin, Hinokitiol, Cetylpyridinium chloride containing gel($Dentheth^{(R)}$) on periodontitis. 41 patients with sites having pocket depth of 4-6mm were selected for the study. We classified 2 groups which consisted of 21 patients in the test group(exp.) and 20 patients in the control(placebo) respectively. Following a baseline examination, plaque and calculus were removed and then the experimental gel were handed out to the patients and topical application regimens were initiated. During the 4-week experimental period, pocket depth, bleeding on probing, gingival index, plaque index as a clinical parameters were measured in the baseline, 2 weeks, 4 weeks respectively. A questionnaire was delivered to each patients in 2 weeks, 4 weeks respectively. The results were as follows : 1. Probing pocket depth showed a significant difference in the Exp. group compared with the control group in the changes from baseline to 2 weeks(p<0.05), but there was no significant difference between the groups in the changes from baseline to 4 weeks, from 2 weeks to 4 weeks(p<0.05). 2. The Exp. group showed a significant difference compared with the control group in the changes from baseline to 2 weeks, from baseline to 4 weeks, from 2 weeks to 4 weeks in bleeding on probing(p<0.05). 3. The gingival index showed a significant difference compared with the control group in the changes from baseline to 2 weeks, from baseline to 4 weeks, from 2 weeks to 4 weeks after 4 weeks use of a gel(p<0.05). 4. The plaque index showed a significant difference in the Exp. group compared with the control group in the changes from baseline to 2 weeks(p<0.05), but there was no significant difference between the groups in the changes from baseline to 4 weeks, from 2 weeks to 4 weeks(p<0.05). 5. A questionnaire was consisted of 5 kinds as to bleeding, pus discharge, pain, burning sensation, patient's satisfaction and all of the questions showed a significant difference compared with the control group in the changes from 2 weeks to 4 weeks(p<0.05). 6. During the 4-week experimental period, important side-effects were not finded out, but each groups had one patient appealed nausea or discomfort respectively. These results indicate that application of periodontitis medical gel was useful as an additional aid of mechanical treatment.

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Effect of Dietary Fats and Tomato on the Immune Functions of BALB/c Mice (식이지방과 토마토가 BALB/c 마우스의 면역활성에 미치는 영향)

  • Lim, Sang-Dong;Han, Chan-Kyu;Sung, Kee-Seung;Kim, Kee-Sung
    • Korean Journal of Food Science and Technology
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    • v.38 no.2
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    • pp.273-278
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    • 2006
  • Effects of dietary fat and tomato on immune functions were investigated using BALB/c mice. Sixty male BALB/c mice weighing 16-17g were divided into two dietary groups. Control group was fed experimental chow (AIN-76 purified diet) supplemented with saturated fat (beef tallow) and unsaturated fat (safflower oil) at 5% level (weight basis), while treatment group was fed chow added with 0.5% (dry matter basis) of tomato (moisture content 95%) for 10 weeks. Organ weights, delayed-type hypersensitivity test, plaque-forming cell test, agglutination test, differential white cell count, and histological examination were performed at 4th, 7th, and 10th week after dietary treatment. Weight of spleen and spleen index of tomato group increased with increasing experimental period. Thymus index of tomato group was significantly higher than that of control group at 7 and 10 weeks (p<0.05). In delayed hypersensitivity test at 4th, 7th, and 10th week after dietary treatment, tomato group showed more significant increase in footpad swelling reaction 24 hr after challenge than control group (p<0.05). In plaque-forming cell test, tomato group fed 7 weeks increased more significantly than control group, while no significant difference was found between two groups at 10 weeks. Agglutination test decreased with increasing experimental period; tomato group at 10 weeks was higher than control group in antibody response to SRBC. In tomato group, Iympocyte percentage was slightly higher than that of control group, and spleen tissue showed active immune reaction caused by severe proliferation of white pulp.

Measuring Effects of Quality Improvement through the Development of Critical Pathway for Gamma Knife Radiosurgery (당일 감마나이프수술 환자의 표준진료지침 개발을 통한 질 향상 효과 측정)

  • Kim, Moo Seong;Ha, So Young;Bae, Yoon Hyuk;Jung, Yong Tae;Kim, Sung Tae;Lee, Won Hee;Go, Yeon Joo
    • Quality Improvement in Health Care
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    • v.18 no.1
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    • pp.27-36
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    • 2012
  • Objectives : A protocol called "critical pathway" was developed to standardize the management of hospital patients the day after they underwent gamma knife radiosurgery. The quality of improvement in patient outcomes was evaluated. Methods : Critical pathway was developed, according to the regulations of the I hospital, by analyzing the medical records of 22 inpatients who underwent gamma knife surgery within the period from January to April 2011 on the day of the surgery. The study included a group of 22 patients admitted to the hospital the day after they underwent gamma knife radiosurgery, between July and September 2011. The control group included 22 patients who had surgery employing the same method within the period from May to June 2011. To measure the effects on quality improvement, the average length of stay, the execution rate of the hospital discharge notice system, daily hospital revenue, and the satisfaction of the patients and the medical team were assessed. The patient questionnaire employed a four-point Likert scale while the medical-staff questionnaire employed a five-point Likert scale. Result : The average length of stay was significantly shorter in the study group compared to the control group (2.3 days vs. 3.8 days, P<0.05). The execution rate of the hospital discharge notice system was higher in the study group (100% vs. 72%) than in the control group. Daily hospital revenues were higher by 264,178 Korean won in the study group when compared to the control group. The study group showed greater satisfaction of patients compared to the control group based on a four-point Likert scale (P<0.05). The study group showed greater satisfaction in medical team compared to the control group based on a five-point Likert scale (P<0.05). Conclusion : The development and implementation of a critical pathway protocol for hospital admission the day after gamma knife radiosurgery is an effective care process that improves the clinical quality.

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Effects of Shield Materials on the Growth and Yield Characteristics of Melon Grown inside a Plastic Greenhouse in Summer Season (고온기 멜론 시설재배 시 자재별 차광 효과)

  • Lee, Jae Han;Lee, Jung Sup;Kwon, Joon Kook;Yeo, Kyung Hwan;Bang, Ji Woong;Kim, Jin Hyun;Lee, Choung Keun;Park, Kyoung Sub;Myung, Dong Ju
    • Journal of Bio-Environment Control
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    • v.30 no.4
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    • pp.304-311
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    • 2021
  • This Experiment was conducted to determine the effects of light shield materials when melon grown inside a plastic greenhouse in summer season. The average temperatures were 36.6℃, 34.5℃ and 34.0℃ respectively for the control(non-shield), coating agent, and the white net. The light transmittances were 69% and 75%, respectively inside the greenhouse treated with the coating agent and white net immediately after applicants, compared with that inside the control greenhouse. At the 40 and 80 days after treatment, the light transmittances for the coating agent were 92% and 98%, respectively, indicating it was slowly decomposed and removed, but there was no change in the transmittance for the white net. While the leaf number did not differ among the treatments, the plant height was higher in the white net and shading agent than in control. The weight of the leaves, fresh-weight and dry-weight were no different from that of shading, but it became heavier in the later stages. The marketable fruit yield was increased by 6% for white nets and 5% for the coating agent compared to control, there was no statistical significance. Therefore, coating agent is considered as an effective method to lower temperature during high temperature period, but it is preferable to use it in consideration of cultivation period, because the coating agent is gradually removed.

Oxidative stress impairs the meat quality of broiler by damaging mitochondrial function, affecting calcium metabolism and leading to ferroptosis

  • Chen, Zuodong;Xing, Tong;Li, Jiaolong;Zhang, Lin;Jiang, Yun;Gao, Feng
    • Animal Bioscience
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    • v.35 no.10
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    • pp.1616-1627
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    • 2022
  • Objective: This work was conducted to investigate the effects of oxidative stress on meat quality, mitochondrial function, calcium metabolism and ferroptosis of broilers. Methods: In this study, a total of 144 one-day-old male Ross 308 chicks were divided into 3 groups (control group, saline group, and hydrogen peroxide [H2O2] group) with 6 replicates of 8 broilers each. The study lasted for 42 d. The broilers in the saline and H2O2 groups were intraperitoneally injected with 0.75% saline and 10.0% H2O2 on the 16th and 37th day of the experimental period respectively, the injection volumes were 1.0 mL/kg of broiler body weight. On the 42nd day of the experimental period, two chicks were randomly selected from each cage, a total of thirty-six chicks were stunned by electric shock and slaughtered to collect breast muscle samples. Results: The H2O2 exposure reduced pH value, increased drip loss and shear force of breast meat (p<0.05), impaired the ultrastructure and function of mitochondria. The H2O2 exposure damaged the antioxidant system in mitochondria, excessive reactive oxygen species carbonylation modified calcium channels on mitochondria, which impaired the activities of key enzymes on calcium channel, resulted in the increased calcium concentration in cytoplasm and mitochondria (p<0.05). In addition, the H2O2 exposure increased the iron content and lipid peroxidation (p<0.05), which induced ferroptosis. Conclusion: Oxidative stress could impair meat quality by causing mitochondrial dysfunction, resulting in calcium metabolism disorder and ferroptosis.

Assessment of LCD Color Display Performance Based on AAPM TG 18 Protocol : Decision of Quality Control and Calibration Period (판독용 LCD 컬러 모니터 장치의 성능 평가 - 성능 평가 및 Calibration 주기 결정을 중심으로 -)

  • Lee, Won-Hong;Son, Soon-Yong;Noh, Sung-Soon;Lee, In-Hwa;Kang, Sung-Ho;Lee, Yong-Moon;Park, Jae-Soo;Yoon, Seok-Hwan
    • Journal of radiological science and technology
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    • v.31 no.1
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    • pp.55-60
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    • 2008
  • Purpose: This study is to decide a quality control and calibration period of LCD display devices used for reading diagnostic images. Materias and Methods: The assessment test of 20 flat panel LCD color display devices used for reading diagnostic images were performed based on AAPM TG 18 protocol over the total six sessions at one month intervals from three months after primary calibration, in terms of geometric distortion, reflection test, luminance response evaluation, luminance uniformity, resolution, noise, veiling glare and chromaticity test. Results: The results of geometric distortion, reflection test, luminance uniformity, resolution, noise, veiling glare and chromaticity test were within the criteria recommended by AAPM TG 18, except for luminance response evaluation. In the measured luminance deviation of luminance response evaluation, 4(25%) of 20 display devices were passed a criterion from four months after calibration, and 11 (55%) were passed from eight months. Also in the contrast response of the luminance response evaluation, 1(5%) display device was passed a criterion from four months after calibration, and 3(15%) were passed from eight months. Conclusion: Considering the passing deviation after calibration, the time required and a manpower, the quality control and calibration period of LCD display devices used for reading diagnostic images should be a three months and six months after calibration.

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Oseltamivir efficacy, side effects, and safety in children with influenza (인플루엔자 바이러스 감염 소아 환아에서 Oseltamivir 약제 효용성과 단기간.장기간 부작용 및 안전성에 관한 임상연구)

  • Seo, Eun Sun;Park, Geun Hwa;Kim, Sung Mi;Kim, Sung Won;Jung, Woo Sik;Cho, Kyung Soon;Park, Yeon Gyeong;Lee, Chang Kyu;Kang, Chun;Lee, Joo Yeon;Choi, Woo Young
    • Clinical and Experimental Pediatrics
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    • v.53 no.1
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    • pp.56-66
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    • 2010
  • Purpose : Although oseltamivir is widely used for treatment of influenza, few clinical studies of its efficacy and resistance have been performed in Korea. We evaluated the safety, side effects, and efficacy of oseltamivir treatment in Korean pediatric patients. Methods : We analyzed 321 children diagnosed with influenza at Busan St. Mary's Medical Center, Korea, between January 2008 and June 2008 (first study period) and November 2008 and January 2009 (second study period). Patients were divided into two groups: those receiving oseltamivir treatment for 5 days and those receiving only symptomatic treatment. We investigated clinical symptoms, side effects, and resistance to oseltamivir. We also identified influenza strains and evaluated resistance to oseltamivir using an influenza virus culture. Results : One hundred eighty-six patients were assigned to the treatment group, and 135 were assigned to the control group. The treatment group showed shorter admission duration (4.4 days) compared with controls (5.0 days) (P =0.000) and had fewer lower respiratory tract complications compared with controls (P <0.05). No significant statistical difference in the virus antigenic type was observed between the groups. In the first study period, virus culture showed influenza B (41.7% vs. 49.6%), A/H3N2 (7.9% vs. 8.4%), and A/H1N1 (9.4% vs. 6.5%). In the second study period, only A/H1N1 (55.3% vs. 50.0%) was isolated, except for one case of A (H3N2) in the treatment group. No differences in short- and long-term side effects, including neuropsychologic side effects, were noted between groups. There was no resistance to oseltamivir before or after treatment in the first study period. Conclusion : Based on our results, we suggest that osetalmivir therapy in pediatric patients is effective.