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      • 보디빌딩 선수들의 시합 전·후 신체조성과 체력 및 혈관탄성도 변화와 영양섭취 실태연구

        곽재준,박재성,하수민,백영호 釜山大學校 附設 體育科學硏究所 2013 體育科學硏究所 論文集 Vol.30 No.-

        The purpose of this study were to investigate a study of body composition, physical fitness, change of vascular compliance and nutrient intake status a before and after bodybuilders match. In this study, participants were 6 bodybuilders. The analyzed data brought about the following results by using paired t-test with SPSS 20.0. The results of the research were as follows. In to body weight and BMI were significantly increased but sit and reach were significantly decreased after match. There was non significantly difference in vascular compliance. Calories, lipids, carbohydrates, fiber and ash had significantly increased after match than before match. Calcium, iron, sodium, potassium, vitamin A, retinol, vitamin B1, vitamin B6, niacin, vitamin C, vitamin E had significantly increased after match than before match. Therefore, Bodybuilders need correct regular diet habit and exercise prescription after match. 본 연구는 B광역시 남자 보디빌딩 선수 6명을 대상으로 신체조성, 체력, 혈관탄성도 및 영양소 섭취상태를 시합 전·후를 분석하는데 목적이 있다. 자료처리는 SPSS 20.0 프로그램을 이용하여 paired t-test를 실시하였고, 연구결과에서 다음과 같은 결론을 얻었다. 시합전에 비해 시합후에 체중과 BMI는 유의하게 증가하였고, 유연성은 유의하게 감소하였고, 혈관탄성도는 유의한 변화가 없었다. 그리고 열량, 지질, 당질, 식이섬유 및 회분은 시합 전 보다 시합 후 유의하게 증가하였다. 또한, 칼슘, 철분, 나트륨, 칼륨, 비타민 A, 레티놀, 비타민 B1, 비타민 B6, 나이아신, 비타민 C, 비타민 E는 시합 전 보다 시합 후 유의하게 증가하였다. 이상을 종합하여 볼 때, 시합 전보다 시합 후에 영양소의 섭취증가로 인해 체중이 증가하는 것을 알 수 있으며, 이상의 연구 결과에서 시합전, 후의 식습관, 맞춤형 운동처방 및 체계적인 컨디셔닝 관리가 요구된다.

      • KCI등재

        치과용 갈륨합금의 조성변화가 부식 및 기계적특성에 미치는 영향

        박영준,이용렬,이도재,Norling, Berry K,Rawls, H Ralph 대한치과기재학회 2001 대한치과재료학회지 Vol.28 No.2

        This study was performed to evaluate the effects of compositional variations of dental gallium alloys on their corrosion and mechanical behaviors. 60Ag-28Sn-12Cu wt% (ST group) was prepare by atomization. ST-Pd and ST-Pt groups were prepared by substituting part of tin (Sn) with Pd (2 wt%) and Pt (0.05 wt%), respectively. Low-and high-copper amalgam alloys (LCA and HCA) were also prepared by atomization method for comparison. Alloy powders of each group were mixed with liquid gallium alloy that was composed of 61.98Ga-24.99In-12.98Sn-0.05Bi wt%. Specimens were made according to ADA specification no. 1. Corrosion behavior was evaluated by potentiodynamic anodic polarization test together with X-ray diffractometry (XRD), and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS). 24 hour-compressive strengths and dimensional changes were measured. Following results were obtained. ST-Pd group showed most anodic behavior with the corrosion potential (E□) of-707 mV (vs. SCE), which is a significant shift in the noble direction from the -883 mV(vs.SCE) of the ST group (p<0.05). Among the specimens of St-Pd group, one specimen even had an E□ of -580 mV showing pronounced improvement in corrosion resistance. LCA group showed the worst corrosion resistance, having E□ of -896 mV. Set specimens had multi-phase microstructures consisting of Ag9In4, CuGa₂, □-Sn, Ag□₂Ga₂□, AG₄Sn and Cu3Sn, and all the groups showed similar XRD patterns. Ag9In4 was the main reaction matrix phase showing strongest XRD peak. CuGa2 phase surrounded the unreacted powder particles. A mixture of light Ag9In4 phase and a dark gray Ga42.3-Cu17.1-Ag16.8-Bi0.2 wt% solid solution appeared in the intergranular layer. ST-Pd group required the shortest mixing time. The intensity of the Ag4Sn peak of unreacted powder was lower and peak intensity of Ag□Ga₂□ phase, which is more corrosion resistant, was higher when compared to that of ST group. Sn(Cu)-Cl corrosion products having various morphologies were formed on corroded specimen surfaces. ST-Pd group had lesser deposition of corrosion product compared to other groups. LCA group specimens corroded more than HCA group specimens. 27-hour ST-Pd group showed highest value compared to those of other groups (p<0.05). HCA group showed higher compressive strength compared to that of LCA group. 24-hour setting expansions were ST-Pd*****(0.24%)<<LCH(0.43%)<ST-Pt(0.51%) <ST(0.56%)<<HCA(1.33). ST-Pd group showed significantly lower setting expansion (p<0.014). HCA group having 28 wt% Cu in alloy powder showed 1.33% setting expansion value which is significantly higher than those of other groups (p<0.01). In summary, substituting 2 wt% palladium for 2 wt% tin in the alloy powder improved the corrosion resistance and compressive strength, and reduced the degree of setting expansion. High-copper content induced excessive setting expansion. This finding indicates that there is still room for further improvement of the corrosion resistance and mechanical properties of dental gallium alloys through composition modification. With furher research, there is still a possibility for gallium alloy to become a successful substitute for dental amalgam.

      • Lycopersicum esculentum 'cherry tomato'의 葯培養에 관한 硏究

        鄭海駿,李永馥 培材大學校 1984 論文集 Vol.5 No.-

        Anthers at the stage of uninucleate microspore of Lycopersicum esculentum 'cherry tomato' were cultured on the Murashige and Skoog's medium suppllemented with NAA and BA. Most of the binucleate microspores were equationally divided whereas the unequational division was relatively rare. The two nuclei formed were again divided into multinuclei, which were further developed into calli. After one month of culture, calli there formed on the MS medium containing BA 2mg/l and NAA 0.25mg/l. Shoot of embryoid-like body was not formed from the calli after subculture on the medium with reduced amounts of auxins.

      • KCI등재

        Hemophilia 환아의 관혈적 치과치료에 관한 증례보고

        이준균,이긍호,최영철 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.4

        혈우병은 성염색체 열성 유전양식에 따라 유전되는 출혈성 질환으로서 응고인자의 결핍이나 결손에 의해 혈액응고 시간이 지연되게 된다. 과거에는 혈우병 환자의 치과치료시 과다출혈의 위험성 때문에 치과시술을 위해서는 입원하여 내과 전문의나 혈액 전문의가 출혈을 조절하도록 하여 치료하는 것이 바람직한 것으로 여겨졌으나, 최근의 혈액응고기전에 대한 이해와 의료기술 발전에 의해 출혈을 좀더 효과적으로 조절할 수 있게 되었다. 본과에 내원한 혈우병 B, 중증과 혈우병A, 중증에 해당하는 환아에서는 관혈적인 치과치료를 시행하여 각각의 과정 및 치료 원칙에 관하여 다음과 같이 보고하는 바이다. 1. 혈우병 환자의 치료시에는 반드시 환자의 내과, 소아과 또는 혈액 전문의와 상의하여 긴밀한 협조하에 치과 치료를 시행하도록 한다. 2. 환자의 치료방법은 환자의 전신상태와 협조도 및, 필요한 시술의 위험성 정도에 따라 결정하도록 한다. 3. 치과치료의 전과 후에 혈액응고인자의 투여 등으로 발생하는 불편과 합병증의 기회를 최소로 하기 위해 치료를 위한 내원 횟수를 가능한 한 줄여주는 것이 바람직하며, 치료시 에는 감염을 예방하고 지혈을 도울 수 있는 치료를 시행해야 한다. With the progress of medical treatment techniques of bleeding control, dental care of the patient with hemophilia has become more convenient. So many surgical treatments can be performed with out-patient. 2 cases of intraoral surgical treatment of children. one with hemophilia B, sever, the other with hemophilia A, severe. While the former was treated under general anesthesia, the latter was treated under local anaesthesia. There are principles: 1.When a patient with hemophilia need dental treatment, the dentist must consult to his physician, pediatrician, or hematologist before dental treatment. 2.When the dentist make a treatment plan, there should be consideration of the general condition, cooperation of the patient and risk of the treatment needed. 3. Minimize the number of times of coming for dental treatment so that reduce the times that need replacement therapy of coagulation factor. And during the treatment, dentist should care of infection and bleeding.

      • 효율적인 메세지 인증 방식

        최준기,이임영 순천향대학교 부설 산업기술연구소 1995 순천향 산업기술연구소논문집 Vol.1 No.2

        In this paper, we propose a message authentication method using chaining blocks. This method is more efficient and reliable than the conventional message authemtication method having a single authenticator. The proposed block chaining method with the parameters such as total message block, authenticate rate and block size is experimented. When a bit error rate is 10-²(10??) in communication channel, the chaining block method shows more efficient and reliable results.

      • KCI등재

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