• 제목/요약/키워드: biological function

검색결과 2,111건 처리시간 0.039초

Mechanism, Function and Regulation of Microtubule-Dependent Microtubule Amplification in Mitosis

  • Zhu, Hui;Fang, Kayleen;Fang, Guowei
    • Molecules and Cells
    • /
    • 제27권1호
    • /
    • pp.1-3
    • /
    • 2009
  • Mitotic spindle mediates the segregation of chromosomes in the cell cycle and the proper function of the spindle is crucial to the high fidelity of chromosome segregation and to the stability of the genome. Nucleation of microtubules (MTs) from centrosomes and chromatin represents two well-characterized pathways essential for the assembly of a dynamic spindle in mitosis. Recently, we identified a third MT nucleation pathway, in which existing MTs in the spindle act as a template to promote the nucleation and polymerization of MTs, thereby efficiently amplifying MTs in the spindle. We will review here our current understanding on the molecular mechanism, the physiological function and the cell-cycle regulation of MT amplification.

기억력과 정신질환 (Memory and Psychiatric Disorders)

  • 홍경수;연병길
    • 생물정신의학
    • /
    • 제4권1호
    • /
    • pp.3-11
    • /
    • 1997
  • Disturbances in memory are the most common problem in patients with an organic mental syndrome. Other patients with significant psychiatric disorders also often have difficulty with memory. So it is very important in the clinical practice of psychiatry to understand the biological and neurocognitive mechanisms of memory proessing, and to develop the assessment tools with which memory function can be evaluated reliably and validly. Moreover, memory researches provide an important viewpoint from which we can understand the pathophysiological mechanisms of major neuropsychiatric illnesses. This article focuses on our understanding of memory functions in clinical and neurobiological aspects. The relevant material will be presented in four parts : 1) terminologies needed in defining major stages of various types of memory processing : 2) neurochemical and neuroanatomical basis of memory processing : 3) brief bed-side screening tests and more comprehensive neuropsychological tests for the evaluation of memory function : 4) the characteristics of memory dysfunction in several major psychiatric illnesses.

  • PDF

정신치료의 신경생물학적 기전 (Neurobiological Mechanism of Psychotherapy)

  • 이승환;김승현
    • 생물정신의학
    • /
    • 제9권2호
    • /
    • pp.79-94
    • /
    • 2002
  • Polarisation of biological and psychosocial aspects of psychiatry is nowadays main stream. Current knowledges of the interaction between biology and psychology make it possible to consider a truly integrative approach of the two aspects. Research findings suggest that the neuronal plasticity is the key mechanism to answer how the mental function work to an environmental stimuli and how the psychotherapeutic approach work on the brain. Advances in neuroscience research have led to a more sophisticated understanding of how psychotherapy may affect brain function. Even though there have been a tremendous efforts to find out the neurobiological mechanism of mental function, the answer is at best premature. In this article, research findings about of neuronal plasticity, implicit memory, animal studies which were associated with psychotherapy and psychological aspects were reviewed.

  • PDF

기초간호자연과학 4개 교과목(인체 구조와 기능, 병원미생물학, 병태생리학, 약물의 기전과 효과) 표준 강의계획서 개발 (Development of Standard Syllabuses for 4 Subjects (Structure and Function of Human Body, Pathogenic Microbiology, Pathophysiology, Mechanisms and Effects of Drug) of Bionursing)

  • 이경숙;정재심;최명애;김주현;안경주;김진학;신기수;김윤경;이윤미;추상희;최스미
    • Journal of Korean Biological Nursing Science
    • /
    • 제15권1호
    • /
    • pp.33-42
    • /
    • 2013
  • Purpose: The purpose of this study was to develop standard syllabuses of 4 subjects (Structure and Function of Human Body, Pathogenic Microbiology, Pathophysiology, Mechanisms and Effects of Drug) of bionursing. Methods: We developed standard syllabuses of 4 subjects through 3 step discussions and analysis. At first each committee for 4 subjects made the syllabus, after then all researchers discussed together. Finally each committee concluded final one. Committee members consisted of professors who teach that subject at nursing college. Results: Standard syllabus for Biological Nursing I-1 or Structure & Function of Human Body I consisted of 3 parts and 9 themes and for Biological Nursing I-2 or Structure & Function of Human Body II was 3 parts and 9 themes. Standard syllabus for Biological Nursing II or Pathogenic Microbiology consisted of 8 themes and Biological Nursing III or Pathophysiology consisted of 2 parts and 19 themes. Standard syllabus for Biological Nursing IV or Mechanisms & Effects of Drug consisted of 2 parts and 13 themes. Conclusion: The standard syllabuses and titles of 4 subjects of bionursing need to be disseminated to all the nursing college by Academy of Korean Biological Nursing Science. Further researches to investigate curriculum for bionursing and to identify the effects of 4 standard syllabuses were recommended.

오령산 효능에 관한 기초 실험 연구 문헌 분석 (Analysis of biological experiment on Oryeong-san (Wuling-san))

  • 김정훈;신현규
    • 대한한방내과학회지
    • /
    • 제33권1호
    • /
    • pp.69-82
    • /
    • 2012
  • Objectives : To establish objective and scientific evidence of Korean medicine (KM), the papers on Oryeong-san (Wuling-san) frequently used in medical institutions of Korean Medicine were analyzed. Methods : The papers were classified by the registration of domestic or international journals, the year of publication, experimental fields and the kinds of studies on biological activities. The therapeutic mechanism was investigated in accordance with therapeutic effect of Oryeong-san (Wuling-san). Results : Out of 57 articles selected, 16 were published in domestic journals, 17 were in Chinese journals and 24 were in Japanese journals. Most papers reported as biological activities were on improvement of renal function. Oryeong-san (Wuling-san) increased urine factor such as urine excretion and electrolyte balance while decreasing proteinuria, serum factors including creatinine, cholesterol and triglyceride. In addition, injured renal tissue was recovered normally and gene expression controlling urine excretion was down-regulated. Conclusions : Improvement of renal function could be interpreted as objective and scientific evidence for Oryeong-san (Wuling-san).