• 제목/요약/키워드: Organ culture

검색결과 211건 처리시간 0.025초

병원 조직문화 및 조직몰입과 조직시민행동 간의 관계에 관한 연구 (A Study on the Relationship between Organizational Culture, Organizational Commitment and Organization Citizenship Behavior in hospitals)

  • 이용철;최수형
    • 한국병원경영학회지
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    • 제7권2호
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    • pp.1-23
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    • 2002
  • D. W. Organ(1977) published a paper about the importance of Organizational Citizenship Behavior(OCB) in an organization. Since then, the studies of OCB have been continuously increased. As recent business environment has changed with rapidity and uncertainty, OCB for the improvement performance of organization should be more emphasized. Role behaviors of organization are divided into two parts such as in-role behavior and extra-role behavior. In recent, although the researches about extra-role behavior have been studied, they are still not sufficient. This study attempted to examine relationships between organizational culture, organizational commitment and organizational citizenship behavior, Sample was 193 employee engaged in hospitals of Pusan. In this study I chose four factor(affective, conservative, task and innovative culture) of organizational culture and three factors (affective, continuous and normative commitment) of organizational commitment and five factors(altruism, conscientiousness, courtesy, civic virtue and sportsmanship) with regard to organization citizenship behavior. The major findings of the empirical research are as follows ; 1. The Causal relation of dimensions of organizational culture and dimensions of OCB. 1) Affective culture has significant impact on courtesy, civic virtue of OCB. 2) Conservative culture has no significant impact on all of OCB. 3) Task culture has significant impact on conscientiousness, civic virtue, sportsmanship of OCB. 4) Innovative culture has no significant impact on courtesy, civic virtue of OCB. 2. The Causal relation of dimensions of organizational commitment and dimensions of OCB. 1) Affective commitment has significant impact on all of OCB. 2) Continuous commitment has no significant impact on all of OCB. 3) Normative commitment has significant impact on courtesy, civic virtue of OCB. In brief, though this study has several limitations in research design and methods, the results suggest that organizational culture of hospitals and organizational comitment of hospitals shows a strong relationship to the organization citizenship behavior.

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Plant cell culture strategies for the production of natural products

  • Ochoa-Villarreal, Marisol;Howat, Susan;Hong, SunMi;Jang, Mi Ok;Jin, Young-Woo;Lee, Eun-Kyong;Loake, Gary J.
    • BMB Reports
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    • 제49권3호
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    • pp.149-158
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    • 2016
  • Plants have evolved a vast chemical cornucopia to support their sessile lifestyles. Man has exploited this natural resource since Neolithic times and currently plant-derived chemicals are exploited for a myriad of applications. However, plant sources of most high-value natural products (NPs) are not domesticated and therefore their production cannot be undertaken on an agricultural scale. Further, these plant species are often slow growing, their populations limiting, the concentration of the target molecule highly variable and routinely present at extremely low concentrations. Plant cell and organ culture constitutes a sustainable, controllable and environmentally friendly tool for the industrial production of plant NPs. Further, advances in cell line selection, biotransformation, product secretion, cell permeabilisation, extraction and scale-up, among others, are driving increases in plant NP yields. However, there remain significant obstacles to the commercial synthesis of high-value chemicals from these sources. The relatively recent isolation, culturing and characterisation of cambial meristematic cells (CMCs), provides an emerging platform to circumvent many of these potential difficulties.

Development of in vitro 3D hair growth model using tissue engineering technology

  • Park, Jung-Keug
    • 한국생물공학회:학술대회논문집
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    • 한국생물공학회 2003년도 생물공학의 동향(XIII)
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    • pp.113-117
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    • 2003
  • 모낭은 복잡한 상호작용을 통하여 성장 및 주기가 조절되며 다양한 세포들로 구성진 기관이다. 본 연구에서는 조직공학적 방법을 이용하여 모낭을 구성하는 세포들을 분리 및 배양하였고 세포들의 형태와 증식양상을 관찰할 수 있었고, 기관배양의 방법을 통하여 in vitro에서 첨가물에 대한 모발의 성장 및 주기의 변화를 살펴보았다.

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닭머리 육수 제조 조건의 최적화 및 성분 분석 (Optimization of Preparation Conditions and Analysis of Food Components for Chicken Head Soup Base)

  • 최성은
    • 한국식생활문화학회지
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    • 제26권5호
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    • pp.468-477
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    • 2011
  • Optimum preparation conditions for chicken head soup base were determined in terms of the effects of amount of chicken head and cooking time using response surface methodology based on sensory properties. Sensory properties that were evaluated were yellowness, turbidity, bloody, chicken-brothy, organ meat-like, and fat-like flavor. All values of sensory characteristics increased remarkably with an increase in the amount of chicken head and cooking time. The optimum amount of chicken head and cooking time were determined to be 1800 g and 150 minutes, respectively. Chicken head soup base had less fat, free amino acids, nucleotides, and its derivatives, but had significantly more cholesterol, sodium, and iron than whole chicken soup base. In flavor compound analysis, the amount of hexanal of the chicken head soup base, which is related to fat rancidity flavor, was 11-fold higher than that of the whole chicken soup base.

Implementation of Network System for Bio-physical signal Communication

  • Kim, Jeong Lae;Kang, Jeong Jin;Rothwell, Edward J.
    • International Journal of Advanced Culture Technology
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    • 제1권1호
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    • pp.1-5
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    • 2013
  • This network system for home care realized communication by the bio-physical signal, to convey physical rhythm. Four function of displacement had point of a Vision, Somatosensory, Vestibular and CNS. Bio-physical signal was decided to design a maximum points and minimum points with 0.01unit in reference level. Bio-physical signal was checked to compound physical condition of body posture for sensory organ. There detected a measurement of Vision, Somatosensory, Vestibular, CNS and BMI. The service of network system of home can be used to support a health care system for health assistant in health care center. It will expect to manage a physical parameter for network communication.

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고려인삼의 조직배양에 의한 캘러스 및 기관분화 (Induction of Callus and Organ in Tissue Culture of Ginseng (Panax ginseng C. A. Meyer))

  • 최광태;김명운;신희석
    • Journal of Ginseng Research
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    • 제6권2호
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    • pp.162-167
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    • 1982
  • Calli and leaflets of ginseng (Panax ginseng C.A. Meyer) were cultured on 1/2MS media supplement. with kinetin, 2 iP, NAA, 2,4-D and IBA to assess their capacity to regenerate embryoids and organs. Root calli produced numerous embryoids and shoots in 1/2MS medium supplemented with 2 mg/l NAA and 2mg/s 2iP, and the combination of 2 iP and NAA was more effective than the combination of kinetin and NAA in induction of embryoid and shoot from root calli. Culture of leaflet in the medium supplemented with IBA resulted in profuse root regeneration.

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한의학(韓醫學)에 있어서 소갈증(消渴症)(당뇨병(糖尿病))에 대한 식이요법(食餌療法)의 고찰(考察) (A Dietary Treatment for Diabetes Mellitus in Chinese Medicine)

  • 황호관
    • 한국식생활문화학회지
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    • 제1권4호
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    • pp.311-320
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    • 1986
  • A dietary treatment of Chinese medicine for diabetes mellitus was extensively studied and compared with that of western medicine. The main results are as follows: Chinese medicine is based on the following empirical dietetics. First, likeness helps likeness. When an internal organ of mankind is not functioning properly, the food or drug from the same organ of an animal will be helpful to cure it. Second, take good foods for health properly and never take any foods against body. Third, building up one's body by taking tonics is not quite the same as building up one's body through proper eating. On the other hand, western medicine is based on the experimental and scientific methods which are modernized in accordance with the development of science and technology. It emphasizes upon finding the cause of a disease. Then this disease can be cured by doing a necessary medical treatment which sometime uses a surgical operation or chemical and radiological method or both. Although there are many ways in treating a diabetic in Western Medicine, here the diabetics is supposed to be the best. The same is true for Chinese Medicine. Therefore one can easily conclude that the dietetics is the most important and effective of all irrespective of Western and Chinese Medicine as far as diabetesis concerned. In Western Medicine, a diabetic is recommened to have the minimum calories necessary for life and not to have goods containing glucide beyond a certain quantity, while in Chinese medicine a diabetic is not allowed to have foods containing more than 10% of glucide. These two facts suggest that a diabetic should pay careful attention to foods containing lots of glucide. Finally a systematic cooperation between western and Chinese medicine will cure not only diabetes but also other disease more effectively than a traditionally unilateral method.

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Thimerosal의 발생독성에 관한 연구 (Study on the Developmental Toxicity of Thimerosal)

  • 곽승준;이규식;김순선;손경희;김소희;채수영;최요우;원용혁;박귀례
    • Toxicological Research
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    • 제19권4호
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    • pp.267-275
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    • 2003
  • The purpose of our study was to evaluate the toxicity of the thimerosal in embryos and neonates. Thimerosal (also known as mercurothiolate) is a mercury-containing compound used in trace amounts to prevent bacteria and other organisms from contaminating vaccines, especially in opened multi-dose vials. The toxicity of mercury is well known and those most at risk occurrs in unborn babies and newborn babies. Test methods included in vitro whole embryo culture (WEC) system and in vivo test of neonatal toxicity in Wistar rats. Ethylmercury and methylmercury were used as positive controls for the evaluating of toxic effects of mercury. In WEC assay, treated concentrations of thimerosal, ethylmercury and methylmercury were up to 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5 and 5 $\mu\textrm{g}$/$\textrm{m}{\ell}$, respectively. All compounds didn't show any morphological abnormalities, but showed retardation of growth and development in dose dependent manner (> 0.5 $\mu\textrm{g}$/$\textrm{m}{\ell}$). These data indicated that thimerosal showed developmental toxicity in vitro. In vivo neonatal toxicity, Wistar rats were administered subcutaneously with thimerosal, ethyl mercury, or methylmercury (5, 25, 50, 250, and 500 $\mu\textrm{g}$/kg) during from postnatal day (PND) 4 to 25. Significant effects of these compounds on relative organ weights and organ morphology were not observed in this experiment. However, accumulation of mercury was detected in the kidney and testis when treated with thimerosal, ethylmercury, or methylmercury. These results suggest that thimerosal may be a harmful compound to embryo and neonate, but used concentration of thimerosal in these experiments is much higher than that of clinical application. Further investigation is needed on the safety of vaccine components, i.e. a thimerosal using in vitro and in vivo tests in the future.

TERT mRNA Expression is Up-Regulated in MCF-7 Cells and a Mouse Mammary Organ Culture (MMOC) System by Endosulfan Treatment

  • Je Kang Hoon;Kim Ki Nam;Nam Kung Woo;Cho Myung Haing;Mar Woong Chon
    • Archives of Pharmacal Research
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    • 제28권3호
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    • pp.351-357
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    • 2005
  • Endosulfan is one of the organochlorine pesticides, which are well-known endocrine disruptors (EDs), and it acts as an estrogen agonist. Estrogen is a group of hormones that play an important role in mammary gland function and are implicated in mammary carcinogenesis. In the present study, we studied the effects of endosulfan on nodule like alveolar lesion (NLAL) formation in mouse mammary gland development using a mouse mammary gland organ culture (MMOC) system. Although endosulfan-treated mammary glands did not form NLALs, more alveolar buds were formed in this group than in the negative control (vehicle-treated) group. In addition, telomerase reverse transcriptase (TERT) mRNA expression levels were increased in endosulfan-treated mammary glands in a dose-dependent manner. Telomerase can be activated by estrogen, therefore, we examined the effects of endosulfan on telomerase activity, and found that the telomerase activity in estrogen receptor-positive MCF-7 cells was up-regulated by endosulfan treatment. Moreover, this activation was accompanied by the up­regulation of the TERT mRNA expression. Also, transient expression assays using CAT reporter plasm ids containing various fragments of the TERT promoter showed that this imperfect palindromic estrogen-responsive element is almost certainly responsible for the transcriptional activation by endosulfan. These results may help elucidate the endocrine disrupting mechanism of endosulfan.