• Title/Summary/Keyword: %24SF_6%24

Search Result 98, Processing Time 0.031 seconds

Analysis of Carbon Emissions According to Combustion of Surface Fuels (지표연료의 연소에 따른 탄소배출량 분석)

  • Park, Young Ju;Lee, Hae Pyeong;Kim, Min Jung;Kim, Hae Rim
    • 한국방재학회:학술대회논문집
    • /
    • 2011.02a
    • /
    • pp.192-192
    • /
    • 2011
  • 교토의정서에서 지구온난화의 원인이 되는 온실가스로 $CO_2$, $CH_4$, $N_2O$, HFCs, PFCs, $SF_6$를 규제하고 있다. 규제하는 6대 온실가스 가운데 $CO_2$가 가장 대표적이며, 우리나라의 연료연소에 의한 $CO_2$ 배출량은 세계 10위로 기후변화 진행속도는 세계 평균속도보다 빠르게 진행되고 있다. 이러한 기후변화에 대응하기 위하여는 온실가스 배출로 인한 DB구축 연구가 선행되어야 하며, 산림부분에 있어서는 연료의 열적특성 구명 연구가 극도로 미진한 국내현실에서 기초 data 확보를 위한 연구가 시급한 실정이다. 따라서, 본 연구에서는 산불발생 시 온실가스 배출량의 DB를 구축하기 위하여 산불발생 시 배출되는 탄소배출량을 예측하고자 산림 가연물의 연소실험을 수행 하였다. 연소실험은 산림 연료 가운데 지표연료 10가지(소나무낙엽, 굴참나무낙엽, 소나무솔방울, 밤나무밤송이껍질, 방아풀, 주름조개풀, 칡, 엉겅퀴, 김의털, 고비)를 대상으로 콘칼로리미터 장비를 이용하여 이산화탄소와 일산화탄소 배출량을 분석하였다. 탄소배출량 실험에 앞서 지표연료들의 함수율을 측정한 결과, 10가지 지표연료 가운데 고사한 연료(낙엽, 솔방울, 밤송이)는 9~24% 정도, 생연료인 초본류 6가지는 181~484% 정도인 것으로 나타났으며, 솔방울과 밤송이의 경우 9~10%로 가장 수분을 적게 함유하고 있음을 알 수 있었다. 탄소배출량 분석 결과, 50g 중량에 대한 10가지 지표연료들의 이산화탄소 총배출량은 28~98g 정도, 일산화탄소 총배출량은 0.76~4.08g 정도 배출하는 것으로 나타나 연료별 차이를 보였으며, 특히, 고사한 연료와 생연료의 탄소배출량 차이는 큰 것으로 나타났다. 일산화탄소 총배출량은 고사한 연료(소나무낙엽, 굴참나무 낙엽, 소나무 솔방울, 밤나무 밤송이)는 3.24~4.08g 정도, 생연료 초본류 6가지(방아풀, 주름조개풀, 칡, 엉겅퀴, 김의털, 고비)는 0.76~2.73g 정도 배출하는 것으로 나타났다. 이산화탄소 총배출량은 함수율이 현저히 낮은 4가지 연료(소나무 낙엽, 굴참나무 낙엽, 소나무 솔방울, 밤나무 밤송이 껍질)들은 52~98g 정도, 함수율이 높은 6가지 초본류는 28~48g 정도의 이산화탄소를 배출하는 것으로 나타났다. 따라서, 고사한 연료인 소나무 낙엽, 굴참나무 낙엽, 소나무 솔방울, 밤나무 밤송이는 초본류 보다 상대적으로 이산화탄소와 일산화탄소 배출량이 많은 것으로 나타났으며, 특히, 소나무 솔방울은 가장 많은 이산화탄소와 일산화탄소를 배출하는 것으로 나타났다. 상대적으로 방아풀과 주름조개풀은 각각 28g과 35g으로 이산화탄소 배출량이 작은 것으로 나타났다. 따라서, 산불발생 시, 소나무의 솔방울은 10가지 지표연료 가운데 상대적으로 많은 이산화탄소와 일산화탄소를 배출할 것으로 사료된다.

  • PDF

Characteristics and Pathogenicity of Hyphantria cunea Nuclear Polyhedrosis Virus (Hyphantria cunea Nuclear Polyhedrosis Virus의 특성 및 병원성)

  • Lee, Keun-Kwang;Kim, Myung-Kon;Park, Il-Woong
    • Applied Biological Chemistry
    • /
    • v.38 no.5
    • /
    • pp.435-439
    • /
    • 1995
  • Some characteristics and pathogenicity of Hyphantria cunea nuclear polyhedrosis virus (HcNPV), a potential microbial pesticide was studied. H. cunea NPV replicated in the nucleus of S. frugiperda cells cultured in the TNMFH medium. In case of virus infected cell, prepolyhedra formation was observed at 24hrs post-infection. At 48 hrs post-infection, Most of the infected cell contained many mature polyhedra which were released into culture media 72 hrs post-infection, with the cells grown in suspension culture, pH of the culture medium increased during the virus replication: the pH of fresh medium was 6.35 and rose to 6.77 within 120 hrs. Polyhedra formed a band in linear density gradient of sucrose by centrifugation, which co-sedimented with $50{\sim}55%$ sucrose. The shape of the purified polyhedra was mostly tetragonal hexahedron and its size was about $2.5{\mu}m$. Electron microscopy and phase contrast microscopy showed that many bundled nucleocapsids were occluded in mature polyhedra at 48 hrs post infection. H. cunea larvae infected with NPV showed a higher motality in the second and third instar than in the fourth instar. Death rate of H. cunea larvae in the second and third instar fed with leaves coated with $1.5{\times}10^{9}{\sim}l.5{\times}10^{7}PIBs/ml$ reached more than 90%.

  • PDF

A Study on the Production of Korean Sourdough Bread Using Korean Wheat (우리밀을 이용한 한국형 사워빵 제조에 관한 연구)

  • Chae, Dong-Jin;Lee, Gwang-Seok;An, Hye-Ryeong
    • Proceedings of the Korea Hospitality Industry Research Society Conference
    • /
    • 2005.11a
    • /
    • pp.134-146
    • /
    • 2005
  • This study was intended to make Korean type of sourdough bread using domestic wheat produced in Korea, while measuring and analyzing gluten content, pH level, TTA level and mixograph of wheat to extract the most excellent sourdough starter. Furthermore, this study also used CrumbScan to compare and analyze the properties of product as shown in making sourdough bread with the above starter. pH level ranged from 4.0 to 4.5 throughout all kinds of Korean wheat flour, which were considered to be appropriately available as sourdough starter. As the result of analysis from mixogram, SP fit for making bread but korean wheat flour showed less level of mixing tolerance and content of protein, which were considered inappropriate for making bread. As the result of imaging analysis by CrumbScan, SF, KWF 5and KWF 6 showed the higher fineness and elongation than any other kind of korean wheat flour, which were considered appropriate for making bread.

  • PDF

Effects of Snoezelen Therapy on Stress, Anxiety, Depression, and Quality of Life of College Students with Game Addiction

  • Lim, Ji-Yun;Kim, Jong-Hoon;Lee, Seul-Mi;Jang, Woo-Hyuk
    • The Journal of Korean Physical Therapy
    • /
    • v.33 no.3
    • /
    • pp.123-130
    • /
    • 2021
  • Purpose: Despite the existence of Snoezelen method, there is no case of researching the effects on game addiction. Therefore, this study aims to investigate the effects of Snoezelen therapy on stress, depression, anxiety and quality of life of college students who overuse computer games or mobile phone games. Methods: Eight students who responded to spend more than 30 hours of computer or mobile phone games in the selection questionnaire were recruited (The total respondents were 224 students). Students were randomly assigned to either the study group (4 students) or the control group (4 students). Stress (Korean version of Perceived Stress Scale, K-PSS), depression (Korean Screening Tool for Depression Disorders, K-DEP), Anxiety (Korean Beck Anxiety Inventory, K-BAI) and quality of life (Short Form Health Survey version 2 [SF-36]) were assessed three times (before intervention [pre], post-3 weeks [post 1], post-6 weeks [post 2]). Results: First, the study group (-4.75±3.86) and control group (1.00±2.71) showed significant difference (p<0.05) in the analysis of score changes between pre-test and test at 6 weeks (post 2) for K-DEP. Next, pre-test and test at 3 weeks of intervention (post 1) for K-BAI showed significant difference (p<0.05) in the study group (-2.50±1.91) and control group (2.25±2.99). In addition, pre-test and test at 6 weeks (post 2) showed significant difference (p<0.05) for the study group (-3.00±1.51) and control group (4.75±6.24). Conclusion: The study confirmed the possibility of Snoezelen therapy as a therapy method to induce effective responses in stress, depression, anxiety, and quality of life of college students with game addiction.

Health-Related Quality of Life of Patients with Intermediate Hepatocellular Carcinoma after Liver Resection or Transcatheter Arterial Chemoembolization

  • Xie, ZR;Luo, YL;Xiao, FM;Liu, Q;Ma, Y
    • Asian Pacific Journal of Cancer Prevention
    • /
    • v.16 no.10
    • /
    • pp.4451-4456
    • /
    • 2015
  • Background: The aim of our present study was to compare quality of life (QoL) between intermediate-stage (BCLC-B) HCC patients who had undergone either liver resection or transcatheter arterial chemoembolization (TACE). Materials and Methods: A total of 102 intermediate-stage HCC patients participated in our study, including 58 who had undergone liver resection and 44 who had undergone TACE. Baseline demographic characteristics, tumor characteristics, and long-term outcomes, such as tumor recurrence, were compared and analyzed. QoL was assessed using the Short Form (SF)-36 health survey questionnaire with the mental and physical component scales (SF-36 MCS and PCS). This questionnaire was filled out at HCC diagnosis and 1, 3, 6, 12, 24 months after surgery. Results: For the preoperative QoL evaluation, the 8 domains related to QoL were comparable between the two groups. The PCS and MCS scores were significantly decreased in both the TACE and resection groups at1 month after surgery, and this decrease was greater in the resection group. These scores were significantly lower in the resection group compared with the TACE group (P<0.05). However, these differences disappeared at 3 and 6 months following surgery. One year after surgery, the resection group showed much higher PCS scores than the TACE patients (P=0.018), and at 2 years after surgery, the PCS and MCS scores for the resection group were significantly higher than those for the TACE group (P<0.05). Eleven patients (19.0%) in the resection group and 17 (38.6%) in the TACE group suffered HCC recurrence (P<0.05). Univariate and multivariate analyses indicated that tumor recurrence (HR=1.211, 95%CI: 1.086-1.415, P=0.012) was a significant risk factor for poorpostoperative QoL in the HCC patients.Conclusions: Due to its effects on reducing HCC recurrence and improving long-term QoL, liver resection should be the first choice for the treatment of patients with intermediate-stage HCC.

Fabrication of Through-hole Interconnect in Si Wafer for 3D Package (3D 패키지용 관통 전극 형성에 관한 연구)

  • Kim, Dae-Gon;Kim, Jong-Woong;Ha, Sang-Su;Jung, Jae-Pil;Shin, Young-Eui;Moon, Jeong-Hoon;Jung, Seung-Boo
    • Journal of Welding and Joining
    • /
    • v.24 no.2
    • /
    • pp.64-70
    • /
    • 2006
  • The 3-dimensional (3D) chip stacking technology is a leading technology to realize a high density and high performance system in package (SiP). There are several kinds of methods for chip stacking, but the stacking and interconnection through Cu filled through-hole via is considered to be one of the most advanced stacking technologies. Therefore, we studied the optimum process of through-hole via formation and Cu filling process for Si wafer stacking. Through-hole via was formed with DRIE (Deep Reactive ion Etching) and Cu filling was realized with the electroplating method. The optimized conditions for the via formation were RE coil power of 200 W, etch/passivation cycle time of 6.5 : 6 s and SF6 : C4F8 gas flow rate of 260 : 100 sccm. The reverse pulsed current of 1.5 A/dm2 was the most favorable condition for the Cu electroplating in the via. The Cu filled Si wafer was chemically and mechanically polished (CMP) for the following flip chip bumping technology.

Comparision of carcass characteristics, meat quality, and fatty acid profiles between Duroc and corssbred pigs (Duroc × Korean native pig) (두록과 교잡돈(두록×재래돼지)의 도체 및 육질 특성과 지방산 조성 비교)

  • Kim, Doo-Wan;Kim, Ki-Hyun;Hong, Joon-Ki;Cho, Kyu-Ho;Sa, Soo-Jin;Kim, Young-Min;Park, Jun-Cheol;Seol, Kuk-Hwan
    • Korean Journal of Agricultural Science
    • /
    • v.41 no.4
    • /
    • pp.425-431
    • /
    • 2014
  • This study was conducted to develop new crossbred pig using Korean native pig and Duroc. Fifteen pigs of pure Duroc (D) and 26 crossbred gilts (15 of DK1 and 11 of DK2) were reared until $195{\pm}5$ days old, then slaughtered at local slaughterhouse. Pork loin was gathered and vacuum packed from left carcass after 24 h of slaughter to analyze meat quality traits, such as color, pH, water holding capacity (WHC), cooking loss and shear force (SF), and free fatty acid composition. Live weight and carcass weight of Duroc and DK1 were $119.1{\pm}8.7/82.91{\pm}6.1kg$ and $116.3{\pm}6.3/80.91{\pm}4.4kg$, respectively, and it was significantly higher than those of DK2 ($104.7{\pm}8.4/71.36{\pm}5.7kg$) (p<0.05).There was no significant difference in proximate composition between animal groups, however DK2 showed significantly lower shear force (SF) and higher water holding capacity (WHC) than other groups (p<0.05). The redness of DK2 also showed significantly higher than Duroc (p<0.05), however there was no significant difference in lightness and yellowness (p>0.05). DK1 showed the highest monounsaturated fatty acids (MUFAs) contents of $51.45{\pm}2.0%$ and DK2 showed the highest polyunsaturated fatty acids (PUFAs) contents of $8.98{\pm}1.4%$, however there was no significantly difference in PUFA/SFA ratio between pig groups (p>0.05). Duroc and DK2 contain significantly higher amount of linoleic ($7.99{\pm}1.2$ and $8.11{\pm}1.3%$, respectively) and linolenic acid ($0.43{\pm}0.1$ and $0.44{\pm}0.1%$, respectively) than DK1, and DK1 contains significantly higher amount of oleic acid ($47.32{\pm}1.8%$) than others (p<0.05).

Study on Rheological Properties of Mortar for the Application of 3D Printing Method (3D 프린팅 공법 적용을 위한 모르타르 구성성분 변화에 따른 레올로지 특성 연구)

  • Lee, Hojae;Kim, Won-Woo;Moon, Jae-Heum
    • Journal of the Korean Recycled Construction Resources Institute
    • /
    • v.6 no.1
    • /
    • pp.16-24
    • /
    • 2018
  • In this study, an experiment was conducted to analyze mortar based rheology for 3D printing method application. The tendency of rheological properties due to the change of W/B, binder type, replacement ratio, and super plasticizer which have a great influence on the flow characteristics of concrete was experimentally analyzed. Experiments were carried out by dividing into paste and mortar. In the paste experiment, rheology was analyzed by setting W/B, binder type, replacement ratio, and super plasticizer dosage as main variables. In the mortar experiment, the rheological properties of W/B and sand ratio were analyzed. As a result, as the W/B was increased, the viscosity decreased and the FA ratio to replace FA increased and the viscosity increased. In order to increase the fluidity, substitution of only 5% of SF reduces the shear stress and the viscosity is reduced by about 83%. Mortar rheological evaluation shows that there is a critical section where a large change occurs in the W/B 30 to 40% section. Also, in the same W/B, it is analyzed that there is a critical section where the shear stress increases more than twice in the sand ratio of 50~60%.

Preventive effect of fermented red ginseng on cisplatin-induced nephrotoxicity mouse (Cisplatin으로 유도된 신손상 마우스 모델에 대한 발효홍삼의 예방효능)

  • Hyun, Ja-Kyoung;Kwon, O Jun;Lee, Joo Young;Roh, Seong-Soo;Seo, Young-Bae
    • Journal of Applied Biological Chemistry
    • /
    • v.59 no.2
    • /
    • pp.113-124
    • /
    • 2016
  • Red ginseng is known to have many beneficial effects. Cisplatin, an effective antineoplastic drug, can cause many side effects like irreversible sensorineural hearing loss and serious tinnitus in humans. This study is aimed to reduce a cisplatin's side effect, nephrotoxicity by fermentated korean red ginseng. Korea ginseng was produced by steaming and dring and fermentation. And mice were divided into 4 groups- (A) normal mice, (B) Vehicle treated cisplatin mice, (C) RG0F0-treated cisplatin mice, (D) RG8F3-treated cisplatin mice. C and D groups were feed each material 200 mg/kg/day during 4 days. And cisplatin 20 mg/kg injected to B, C, and D groups as abdominal injection. After 24 h, blood sample was collected. The kidneys were harvested for histological, immuno histochemical and western blot analysis. 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azinobis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging activity was depended on steaming hours. RG0F0 and RG8F3 (ginseng-8 h steamed and fermented by Saccharomyces cerevisiae) were showed antioxidants effect in DPPH and ABTS radical scavenging activity. Component amounts according to steaming hours. 8 h steamed red ginseng had the most ingredients of ginsenoside. Treatments with RG8F3 reduced cisplatin-induced nephrotoxicity in the mice resulting in increase of GSH and decrease of ROS, BUN, creatinine, and inflammatory mediators. This result seems to be involved with the restriction of the inflammation in the kidney. Therefore, fermented red ginseng might have therapeutic efficacy in reduce kidney injury induced by cisplatin treatment.

The Effects of Occupational Stress and Musculoskeletal Symptoms on Health-Related Quality of Life in Female Labor Workers (생산직 여성근로자의 직무스트레스와 근골격계증상이 건강관련 삶의 질에 미치는 영향)

  • Lee, Young-Mee;Phee, Young Gyu
    • Journal of Korean Society of Occupational and Environmental Hygiene
    • /
    • v.26 no.2
    • /
    • pp.210-218
    • /
    • 2016
  • Objectives: The objectives of this study were to investigate female labor workers' occupational stress and musculoskeletal symptoms and to identify the effects of their occupational stress and musculoskeletal symptoms on their health-related quality of life. Methods: A survey was conducted through direct interviews using a musculoskeletal symptoms questionnaire, the Korean Occupational Stress Scale(KOSS), and the Short-Form 36-Item Health Survey(SF-36). Subjects were 112 female labor workers in three factories in D city who were selected by convenience sampling. Results: Factors significantly affecting health-related quality of life were found to be: occupational stress(${\beta}$=-.36); degree of pain, with medium pain(${\beta}$=-.31) and extremely severe pain(${\beta}$=-.24); duration of pain, with more than 1 week-less than 1 month(${\beta}$=-.25) and more than 6 months(${\beta}$=-.16); frequency of pain, with once per 2-3 months(${\beta}$=-.22); responses to pain such as medical leave, use of worker's compensation insurance, task change, etc.(${\beta}$=-.16), and Slightly difficult(${\beta}$=-.16) versus Not hard at all. These variables demonstrated that health-related quality of life is 48%(F=11.72, p<.001) in female workers. Conclusions: To improve female labor workers' health-related quality of life based on the above results, occupational health managers should reduce the workers' occupational stress, develop and apply health interventions regarding musculoskeletal symptoms, prevent the early onset of musculoskeletal symptoms, and protect and promote the workers' health.