• Title/Summary/Keyword: functional role

Search Result 1,936, Processing Time 0.034 seconds

Meanings of ERBR Model in Korean Library Circumstance (한국의 도서관 환경에서 FRBR 모델의 의미)

  • Rho, Jee-Hyun
    • Journal of Korean Library and Information Science Society
    • /
    • v.38 no.2
    • /
    • pp.223-244
    • /
    • 2007
  • With the rapid and broad changes of information ecology, the environment within which cataloging principles and standards operate has changed dramatically. As a result, IFLA study groups developed Functional Requirements for Bibliographic Records(FRBR) model which is a conceptual model for bibliographic universe. This study intends to make a comprehensive inquiry about historical meanings and functional features of FRBR model. To the end, a comprehensive literature survey and analysis was conducted to introduce how hot and serious the discussion on this model in library cataloging. In conclusion, this study made several suggestions on the role of academic and library world (or applications of this model in Korea Library circumstance.

  • PDF

Impact of glycosylation on the unimpaired functions of the sperm

  • Cheon, Yong-Pil;Kim, Chung-Hoon
    • Clinical and Experimental Reproductive Medicine
    • /
    • v.42 no.3
    • /
    • pp.77-85
    • /
    • 2015
  • One of the key factors of early development is the specification of competence between the oocyte and the sperm, which occurs during gametogenesis. However, the starting point, growth, and maturation for acquiring competence during spermatogenesis and oogenesis in mammals are very different. Spermatogenesis includes spermiogenesis, but such a metamorphosis is not observed during oogenesis. Glycosylation, a ubiquitous modification, is a preliminary requisite for distribution of the structural and functional components of spermatids for metamorphosis. In addition, glycosylation using epididymal or female genital secretory glycans is an important process for the sperm maturation, the acquisition of the potential for fertilization, and the acceleration of early embryo development. However, nonemzymatic unexpected covalent bonding of a carbohydrate and malglycosylation can result in falling fertility rates as shown in the diabetic male. So far, glycosylation during spermatogenesis and the dynamics of the plasma membrane in the process of capacitation and fertilization have been evaluated, and a powerful role of glycosylation in spermatogenesis and early development is also suggested by structural bioinformatics, functional genomics, and functional proteomics. Further understanding of glycosylation is needed to provide a better understanding of fertilization and embryo development and for the development of new diagnostic and therapeutic tools for infertility.

Functional Phases and Patterns of Dialogue Sequence in Nurse-Patient Conversation about Medication (간호사와 환자의 투약대화의 구조와 전개과정)

  • Son, Haeng-Mi
    • Journal of Korean Academy of Nursing
    • /
    • v.37 no.1
    • /
    • pp.52-63
    • /
    • 2007
  • Purpose: Effective communication is an essential aspect of nursing care. This qualitative study was performed to analyze nurse-patient conversations about medication. Method: The nurse-patient dialogue was collected by video tape recording during the nurse's duty time in an internal medicine ward. One hundred seventy-eight episodes were extracted from the conversation. Using conversational analysis, the functional phases and patterns of dialogue sequence pertaining to medication were analyzed. Results: Conversations about medication were very brief dialogues, so 68.8% of the dialogue had a duration of less than 20 seconds. However, it was a systematic and comprehensive dialogue which had structures and sequential dialogue patterns. Four functional phases were explored. greeting, identifying the patient, medicating, finishing. The medicating phase was essential, in which the nurse gave the drug to the patient and provided information initiated by the nurse simultaneously. The patterns of the dialogue sequence represented were the nurse provided information first, and then, patients responded to the nurse as accepting, rejecting, raising an objection, or asking again later. Conclusion: As the results of this study show, a nurse's role is important as an educator. For effective conversation about medication, the development of an educational program should be considered, which includes knowledge about medication and communication skills.

Functional Equivalence of Translation Factor elF5B from Candida albicans and Saccharomyces cerevisiae

  • Jun, Kyung Ok;Yang, Eun Ji;Lee, Byeong Jeong;Park, Jeong Ro;Lee, Joon H.;Choi, Sang Ki
    • Molecules and Cells
    • /
    • v.25 no.2
    • /
    • pp.172-177
    • /
    • 2008
  • Eukaryotic translation initiation factor 5B (eIF5B) plays a role in recognition of the AUG codon in conjunction with translation factor eIF2, and promotes joining of the 60S ribosomal subunit. To see whether the eIF5B proteins of other organisms function in Saccharomyces cerevisiae, we cloned the corresponding genes from Oryza sativa, Arabidopsis thaliana, Aspergillus nidulans and Candida albican and expressed them under the control of the galactose-inducible GAL promoter in the $fun12{\Delta}$ strain of Saccharomyces cerevisiae. Expression of Candida albicans eIF5B complemented the slow-growth phenotype of the $fun12{\Delta}$ strain, but that of Aspergillus nidulance did not, despite the fact that its protein was expressed better than that of Candida albicans. The Arabidopsis thaliana protein was also not functional in Saccharomyces. These results reveal that the eIF5B in Candida albicans has a close functional relationship with that of Sacharomyces cerevisiae, as also shown by a phylogenetic analysis based on the amino acid sequences of the eIF5Bs.

Role of network geometry on fluid displacement in microfluidic color-changing windows

  • Ucar, Ahmet Burak;Velev, Orlin D.;Koo, Hyung-Jun
    • Smart Structures and Systems
    • /
    • v.18 no.5
    • /
    • pp.865-884
    • /
    • 2016
  • We have previously demonstrated a microfluidic elastomer, which changes apparent color and could have potential applications in smart windows. The practical use of such functional microfluidic systems requires rapid and uniform fluid displacement throughout the channel network with minimal amount of liquid supply. The goal of this simulation study is to design various microfluidic networks for similar applications including, but not limited to, the color-switching windows and compare the liquid displacement speed and efficiency of the designs. We numerically simulate and analyze the liquid displacement in the microfluidic networks with serpentine, parallel and lattice channel configurations, as well as their modified versions with wide or tapered distributor and collector channels. The data are analyzed on the basis of numerical criteria defined to evaluate the performance of the corresponding functional systems. We found that the lattice channel network geometry with the tapered distributors and collectors provides most rapid and uniform fluid displacement with minimum liquid waste. The simulation results could give an important guideline for efficient liquid supply/displacement in emerging functional systems with embedded microfluidic networks.

The Functional Change of Rural Society in Korea: from Food Supply to Balanced Development (한국 농촌의 기능 변화: 식량공급에서 국가균형발전으로)

  • Lim Hyung-Baek
    • The Korean Journal of Community Living Science
    • /
    • v.17 no.1
    • /
    • pp.55-65
    • /
    • 2006
  • The major purposes of this paper are (1) to explore korean rural planning as subplanning of nation planning and regional planning, (2) to explore functional change of korean rural areas, (3) and suggest appropriate policy for functional change of rural society in Korea. I divided korean rural planning into five periods according to its paradigm shift. In the first period of rural planning lay emphasis on food self-supply, antipoverty and improvement of living condition. In the second period of rural planning lay emphasis on food self-supply, green revolution and income gap mitigation between urban and rural areas. In the third period of rural planning lay emphasis on integrated rural development. In the fourth period of rural planning lay emphasis on multifunctionality of agriculture. In the fifth period of rural planning Korea government announced a new policy and lay emphasis on balanced national development. Food supply used to be most important function of rural areas, but it is weakened in recent days. The role as axis for balanced national development become another important function of rural areas.

  • PDF

Cyclic Vomiting Syndrome: A Functional Disorder

  • Kaul, Ajay;Kaul, Kanwar K.
    • Pediatric Gastroenterology, Hepatology & Nutrition
    • /
    • v.18 no.4
    • /
    • pp.224-229
    • /
    • 2015
  • Cyclic vomiting syndrome (CVS) is a functional disorder characterized by stereotypical episodes of intense vomiting separated by weeks to months. Although it can occur at any age, the most common age at presentation is 3-7 years. There is no gender predominance. The precise pathophysiology of CVS is not known but a strong association with migraine headaches, in the patient as well as the mother indicates that it may represent a mitochondriopathy. Studies have also suggested the role of an underlying autonomic neuropathy involving the sympathetic nervous system in its pathogenesis. CVS has known triggers in many individuals and avoiding these triggers can help prevent the onset of the episodes. It typically presents in four phases: a prodrome, vomiting phase, recovery phase and an asymptomatic phase until the next episode. Complications such as dehydration and hematemesis from Mallory Wise tear of the esophageal mucosa may occur in more severe cases. Blood and urine tests and abdominal imaging may be indicated depending upon the severity of symptoms. Brain magnetic resonance imaging and upper gastrointestinal endoscopy may also be indicated in certain circumstances. Management of an episode after it has started ('abortive treatment') includes keeping the patient in a dark and quiet room, intravenous hydration, ondansetron, sumatriptan, clonidine, and benzodiazepines. Prophylactic treatment includes cyproheptadine, propranolol and amitriptyline. No mortality has been reported as a direct result of CVS and many children outgrow it over time. A subset may develop other functional disorders like irritable bowel syndrome and migraine headaches.

Effects of Low and Moderate Intensity Treadmill Exercise on Functional Recovery and Histological Changes After Spinal Cord Injury in the Rats (척수손상 백서모델에서 저강도 및 중강도 트레드밀 운동이 운동기능회복 및 조직학적 변화에 미치는 영향)

  • Kim, Gi-Do;Kim, Gye-Yeop;Kim, Eun-Jung
    • Physical Therapy Korea
    • /
    • v.16 no.2
    • /
    • pp.41-49
    • /
    • 2009
  • This study was designed to investigate the effects of treadmill exercise of low-intensity and moderate- intensity on the functional recovery and histological change in spinal cord injury (SCI) rats. SCI was induced by the spinal cord impactor dropped after laminectomy. Experimental groups were divided into the Group I (normal control), Group II (non-treatment after SCI induction), Group III (low-intensity treadmill exercise after SCI induction), Group IV (moderate-intensity treadmill exercise after SCI induction). After operation, rats were tested at modified Tarlov scale at 2 days with divided into 4 groups, and motor behavior test (BBB locomotor rating scale, Grid walk test) was examined at 3, 7, 14, and 21 days. For the observation of damage change and size of the organized surface in spinal cord, histopathological studies were performed at 21 days by H & E, and BDNF(brain-derived neutrophic factor) & Trk-b immunohistochemistry studies were performed at 1, 3, 7, 14, 21 days. According to the results, treadmill exercise can play a role in facilitating recovery of locomotion following spinal cord injury. Specially, moderate-intensity treadmill exercise after SCI induction was most improvement in functional recovery and histological change.

  • PDF

Diversity of Arbuscular Mycorrhizal Fungi and Their Roles in Ecosystems

  • Lee, Eun-Hwa;Eo, Ju-Kyeong;Ka, Kang-Hyeon;Eom, Ahn-Heum
    • Mycobiology
    • /
    • v.41 no.3
    • /
    • pp.121-125
    • /
    • 2013
  • Arbuscular mycorrhizal fungi (AMF) have mutualistic relationships with more than 80% of terrestrial plant species. This symbiotic relationship is ancient and would have had important roles in establishment of plants on land. Despite their abundance and wide range of relationship with plant species, AMF have shown low species diversity. However, molecular studies have suggested that diversity of these fungi may be much higher, and genetic variation of AMF is very high within a species and even within a single spore. Despite low diversity and lack of host specificity, various functions have been associated with plant growth responses to arbuscular mycorrhizal fungal colonization. In addition, different community composition of AMF affects plants differently, and plays a potential role in ecosystem variability and productivity. AMF have high functional diversity because different combinations of host plants and AMF have different effects on the various aspects of symbiosis. Consequently, recent studies have focused on the different functions of AMF according to their genetic resource and their roles in ecosystem functioning. This review summarizes taxonomic, genetic, and functional diversities of AMF and their roles in natural ecosystems.

Cell-cell Adhesion of Jurkat T Cells Induced by CD29 and CD98 Activation and its Application (CD29 및 CD98 활성 매개에 의한 Jurkat T 세포의 유착과 그 활용)

  • Kim, Byung-Hun;Cho, Jae-Youl
    • YAKHAK HOEJI
    • /
    • v.53 no.3
    • /
    • pp.119-124
    • /
    • 2009
  • Cell-cell adhesion managed by various adhesion molecules plays an important role in regulating functional activation of cells. This event mediates attachment of inflammatory cells to endothelial cells, interaction of antigen-presenting cells with T cells and metastatic adherence of cancer cells to epithelial tissue cells. Therefore, this cellular response is considered as one of therapeutic target to treat various cancers and inflammatory diseases. To develop proper model for evaluation of functional activation of adhesion molecules, the ability of U937 and Jurkat T cells responsive to various adhesion inducers such as phorbal-12-myristate-13-acetate (PMA), staurosporin and monoclonal antibodies to CD29, CD43 and CD98 was investigated using quantitative cell-cell adhesion assay. U937 cells made more cell-cell clusters by the treatment of antibodies to CD29 and CD43 than Jurkat T cells, while Jurkat T cells exhibited increased cell-cell adhesion ability in CD98 antibody treatment. In agreement, the surface levels of CD29 and CD98 were highly observed in U937 and Jurkat T cells, respectively. Therefore, our data suggest that Jurkat T and U937 cells can be used for model system to evaluate functional activation of adhesion molecules such as CD29 and CD98.