• Title/Summary/Keyword: Physiological conditions

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A Study on Planning Factors of Living Environment by Characteristics of the Elderly (老人의 諸特性에 따른 住居環境計劃因子에 관한 硏究)

  • ByungLeeHeo
    • Journal of the Korean housing association
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    • v.7 no.2
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    • pp.79-89
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    • 1996
  • In this paper, various characteristics-physiological, psychological and social peculiarities \ulcorner of the elderly are analyzed. Then planning factors of living environment are studied to grope directions on design of living spaces for the aged in the future, which is pertinent to their needs.The peculiar properties of the elderly are analyzed and planning factors of architectural spaces are studied by referring to sundry records from many branch \ulcorner gerontology, medical science, psychology, sociology, etc. \ulcorner of knowledge. In planning house for the aged, we have to consider their physiological, psychological, social characteristics and build many types of living spaces in order to meet their special needs in mind, to maintain their living styles. because their personalities, human relations, living patterns, and so forth have been formd individually for a long period of time and their present conditions are different respectively.

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The Centrifugal Influence on Gustatory Neurons in the Nucleus of the Solitary Tract

  • Cho, Young Kyung
    • International Journal of Oral Biology
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    • v.40 no.4
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    • pp.161-166
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    • 2015
  • Neuronal activities of taste-responsive cells in the nucleus of the solitary tract (NST) are affected by various physiological factors, such as blood glucose level or sodium imbalance. These phenomena suggest that NST taste neurons are under the influence of neural substrates that regulate nutritional homeostasis. In this study, we reviewed a series of in vivo electrophysiological investigations that demonstrate that forebrain nuclei, such as the lateral hypothalamus or central nucleus of the amygdala, send descending projections and modulate neuronal activity of gustatory neurons in the NST. These centrifugal modulations may mediate plasticity of taste response in the NST under different physiological conditions.

Lipophagy: Molecular Mechanisms and Implications in Metabolic Disorders

  • Shin, Dong Wook
    • Molecules and Cells
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    • v.43 no.8
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    • pp.686-693
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    • 2020
  • Autophagy is an intracellular degradation system that breaks down damaged organelles or damaged proteins using intracellular lysosomes. Recent studies have also revealed that various forms of selective autophagy play specific physiological roles under different cellular conditions. Lipid droplets, which are mainly found in adipocytes and hepatocytes, are dynamic organelles that store triglycerides and are critical to health. Lipophagy is a type of selective autophagy that targets lipid droplets and is an essential mechanism for maintaining homeostasis of lipid droplets. However, while processes that regulate lipid droplets such as lipolysis and lipogenesis are relatively well known, the major factors that control lipophagy remain largely unknown. This review introduces the underlying mechanism by which lipophagy is induced and regulated, and the current findings on the major roles of lipophagy in physiological and pathological status. These studies will provide basic insights into the function of lipophagy and may be useful for the development of new therapies for lipophagy dysfunction-related diseases.

SAR of COX-2 Inhibitors (COX-2 억제제의 구조-활성)

  • 권순경
    • Biomolecules & Therapeutics
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    • v.9 no.2
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    • pp.69-78
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    • 2001
  • Cyclooxygenase (COX) is an enzyme, which catalyzes the production of prostaglandins from arachi-donic acid and exists in two isoforms (COX-1 and COX-2). COX-1 is involved in the maintenance of physiological functions such as platelet aggregation, cytoprotection in the stomach and maintenance of normal kidney function. COX-2 is induced significantly in vivo under inflammatory conditions. COX-1 and COX-2 serve different physiological and pathological functions. All commercially available nonsteroidal antiinflammatory drugs (NSAIDS) are inhibitors of both COX-1 and COX-2. Therefore, selective inhibitors of COX-2 may be effective antiinflammatory agents without the ulcerogenic effects associated with current NSAms. Since the mid 1990s, a number of reports have been appeared on the preparation and biological activity of selective COX-2 inhibitors. Recently celecoxib, and rofecoxib, the representative COX-2 inhibitors, are introduced in the drug market. In this paper the relationship of structure-activity for selective COX-2 inhibitors is reviewed.

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Photoresponsive Nanocontainers with Ordered Porous Channels

  • Cho, Wansu;Kwon, Youngje;Park, Chiyoung
    • Elastomers and Composites
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    • v.54 no.2
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    • pp.149-155
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    • 2019
  • Controlled mass transport in response to stimuli is essential for drug carriers. The complexity of the signaling system under physiological conditions has led researchers to develop precise nanocontainers that respond to stimuli in the physiological environment. Owing to several reasons, soft nanocontainers such as liposomes and micelles have been investigated for use as drug delivery systems. However, such carriers often suffer from the undesired leakage of drug molecules. In contrast, inorganic nanocontainers are robust, and their surfaces can be easily functionalized. For example, mesoporous silica nanoparticles equipped with gatekeeper molecules are increasingly being used for the controlled release of drug molecules in response to the desired stimuli. Since the development of the first hybrid nanocontainer comprising molecular machines, multiple versions of such gatekeeper systems featuring significantly improved stability and precise response to stimuli have been reported. In this study, various methods for incorporating photoresponsive nanocontainers with porous channels are developed.

Characterization of the rhGH released from rhGH-loaded PLGA microspheres

  • Jo, Yeong-Woo;Lee, Ghun-Il;Park, Yong-Man;Yang, Hi-Chang;Kim, Mi-Ryang;Lee, Sung-Hee;Kwon, Jong-Won;Kim, Won-Bae;Choi, Eung-Chil
    • Proceedings of the PSK Conference
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    • 2002.10a
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    • pp.417.1-417.1
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    • 2002
  • The in vitro release of rhGH from PLGA microspheres was characterized. rhGH-loaded PLGA microspheres were prepared with 50:50 poly(D.L-lactide-co-glycolide) (PLGA) polymers using a double emulsion process. To simulate rhGH release under physiological conditions. the microspheres were suspended in a physiological buller at 37$^{\circ}C$. Quantification of the rhGH released and its molecular form analysis were carried out using SE-HPLC. (omitted)

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Long-term measurement of physiological cardiovascular parameters using telemetry system in dosgs.

  • Kim, Eun-Joo;Seo, Joung-Wook;Choi, Gyu-Kap;Park, Eun-Kyung;Kim, Ki-Suk;Shin, Won-Ho;Han, Sang-Seop
    • Proceedings of the PSK Conference
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    • 2003.10b
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    • pp.87.1-87.1
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    • 2003
  • With the issuance of the ICH “Guidance for industry S7A Safety Pharmacology Studies For Human Pharmaceuticals” in July 2001 came the preference for the use of unanesthetized animals when evaluation the safety profile of new pharmaceutical agents. Telemetry provides a means of obtaining measurements of physiological functions in conscious animals without the problems associated with classical cardiovascular measuring methods. The Korea Institute of Toxicology (KIT) established the telemetric measurement of cardiovascular parameters, such as Blood pressure, Heart rate, ECG (PR, RR, QRS, QT and QTcB interval) under GLP conditions. (omitted)

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Korean Guideline for Managing In-flight Medical Events (한국형 기내 의학적 상황 대처 방안 안내서)

  • Kim, Jungeon;Park, Nah-Lee;Kim, Jung Ha;Kwon, Young Hwan
    • Korean journal of aerospace and environmental medicine
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    • v.30 no.1
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    • pp.3-17
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    • 2020
  • The cabin environment has many physiological effects on commercial aircraft passengers and medical providers, and environmental stress factors exist. Therefore, it is important for medical providers to understand the effects of aviation physiology and cabin environment on the human body. It should also be remembered that these physiological changes and environmental stress factors can affect passengers as well as flight crew and also medical equipment. Providing medical assistance during a flight offers a number of unique challenges including lower cabin pressure, tight quarters, crowded conditions, and loud background noise. The purpose of this Korean guideline is to offer an overview on various in-flight emergencies that could be anticipated and to outline treatment priorities.

Diastereomeric Strain-Promoted Azide-Alkyne Cycloaddition: determination of configuration with the 2D NMR techniques

  • Hye Jin Jeong
    • Journal of the Korean Magnetic Resonance Society
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    • v.27 no.2
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    • pp.10-15
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    • 2023
  • The Strain-Promoted Azide-Alkyne Cycloaddition (SPAAC) is a powerful method for synthesizing triazoles, even under physiological conditions, without a copper catalyst. This technique provides an efficient means for everyone to synthesize complex triazole derivatives rapidly. In order to investigate the configuration of triazole derivatives using bicyclo[6.1.0.]-nonyne (BCN) and chiral azide, it is necessary to employ the 2D NMR. Both 1D and 2D NMR (COSY, HSQC, 15N HMBC) are used to analyze the complex triazole product containing cyclooctyne, a diastereomeric product. The stereometric difference of the proton bonded to the same carbon is determined through the HSQC assignment. The intriguing splitting pattern of carbon resonances also reveals their diastereomeric configuration and will aid in further research based on physiological knowledge.

Matricellular proteins in immunometabolism and tissue homeostasis

  • Kyoungjun Eun;Ah Young Kim;Seungjin Ryu
    • BMB Reports
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    • v.57 no.9
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    • pp.400-416
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    • 2024
  • Matricellular proteins are integral non-structural components of the extracellular matrix. They serve as essential modulators of immunometabolism and tissue homeostasis, playing critical roles in physiological and pathological conditions. These extracellular matrix proteins including thrombospondins, osteopontin, tenascins, the secreted protein acidic and rich in cysteine (SPARC) family, the Cyr61, CTGF, NOV (CCN) family, and fibulins have multi-faceted functions in regulating immune cell functions, metabolic pathways, and tissue homeostasis. They are involved in immune-metabolic regulation and influence processes such as insulin signaling, adipogenesis, lipid metabolism, and immune cell function, playing significant roles in metabolic disorders such as obesity and diabetes. Furthermore, their modulation of tissue homeostasis processes including cellular adhesion, differentiation, migration, repair, and regeneration is instrumental for maintaining tissue integrity and function. The importance of these proteins in maintaining physiological equilibrium is underscored by the fact that alterations in their expression or function often coincide with disease manifestation. This review contributes to our growing understanding of these proteins, their mechanisms, and their potential therapeutic applications.