• Title/Summary/Keyword: physiological

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Effect of Experimental Warming on Physiological and Growth Responses of Larix kaempferi Seedlings (실외 온난화 처리에 따른 낙엽송 묘목의 생리 및 생장 반응)

  • An, Jiae;Chang, Hanna;Park, Min Ji;Han, Seung Hyun;Hwang, Jaehong;Cho, Min Seok;Son, Yowhan
    • Journal of Climate Change Research
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    • v.7 no.1
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    • pp.77-84
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    • 2016
  • Seedling stage is particularly important for tree survival and is easily influenced by warming. Therefore, air temperature being increased due to climate change may affect physiological traits and growth of seedlings. This study was conducted to investigate the physiological and growth responses of Larix kaempferi seedlings to open-field experimental warming. 1-year-old and 2-year-old L. kaempferi seedlings were warmed with infrared lamps since April 2015 and April 2014, respectively. The seedlings in the warmed plots were warmed to maintain the air temperature to be $3^{\circ}C$ higher than that of the control plots. Physiological responses (stomatal conductance, transpiration rate, net photosynthetic rate and total chlorophyll content) and growth responses (root collar diameter (RCD), height and biomass) to experimental warming were measured. Physiological and growth responses varied with the seedling ages. For 2-year-old L. kaempferi seedlings, stomatal conductance, transpiration rate and net photosynthetic rate decreased following the warming treatment, whereas there were no changes for 1-year-old L. kaempferi seedlings. Meanwhile, total chlorophyll content was higher in warmed plots regardless of the seedling ages. Net photosynthetic rate linked with stomatal conductance also decreased due to the drought stress and decrease of photosynthetic efficiency. In response to warming, RCD, height and biomass did not show significant differences between the treatments. It seems that the growth responses were not affected as much as physiological responses were, since the physiological responses were not consistent, nor the warming treatment period was enough to have significant results. In addition, multifactorial experiments considering the impact of decreased soil moisture resulting from elevated temperatures is needed to explicate the impacts of a wide range of possible climate change scenarios.

Relationship between Physiological Response and Salivary Cortisol Level to Life Stress (생활 스트레스에 대한 인간의 생리적 반응과 타액 코티졸과의 관계)

  • Park, Sei-Kwon;Kim, Dong-Soo
    • Journal of the Ergonomics Society of Korea
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    • v.26 no.1
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    • pp.11-18
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    • 2007
  • The physiological and biochemical responses of healthy men and women to life stress were measured in order to temperature, blood pressure (BP), heart rate (HR) and galvanic skin response (GSR) were selected as physiological stress indices and salivary cortisol level was used as a biochemical stres biomarker. Twenty six (male 14 and female 13) colege students were participated in the experiment. Female showed the significant higher value of salivary cortisol level (p<0.01), diastolic BP (p<0.01), and HR (p<0.01) than male. The difference of skin temperature between forehead and fingertip correlated significantly with salivary cortisol level (p<0.01). The LF(low frequency)/HF(high frequency) ratio of HRV also correlated significantly with salivary cortisol level (p<0.01). However, BP, HR and GSR corelated insignificantly with salivary cortisol level. We suggest that LF/HF ratio of HRV and skin temperature may be good indices for the assessment of life stress, and may apply to measure the stress level of individual in real time.

The Effects of Foot Reflexion Massage on Sleep Disturbance, Depression Disorder, and the Physiological Index of the Elderly (발반사마사지가 노인의 수면, 우울 및 생리적 지수에 미치는 영향)

  • Song, Rye-Hun;Kim, Do-Hwan
    • Journal of Korean Academy of Nursing
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    • v.36 no.1
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    • pp.15-24
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    • 2006
  • Purpose: This study was to examine the effects of foot reflexion massage on sleep disturbance, depression disorder, and the physiological index of the elderly in nursing homes. Method: The research design was a non-equivalent control group pretest-posttest quasi-experimental study. The subjects in this study were 50 elderly people who resided in two different nursing homes in the same region. An experimental group and a control group were organized with 25 subjects respectively, and foot reflexion massage was provided for 12 sessions, 30 minutes per session. The selected dependent variables were sleep disturbance, depression disorder, and physiological indices(blood plasma serotonin, serum cortisol), which were all measured before and after foot reflexion massage was offered. Data analysis included $x^{2}$-test, t-test, paired t-test, and ANCOVA, using the SPSS program package. Result: 1. The experimental group improved sleep quality more than the control group. 2. The experimental group had less depression disorder than the control group. 3. The experimental group had higher serotonin levels than the control group. Conclusion: It's necessary to give foot reflexion massage as a successful nursing intervention to elderly who undergo a change in sleep, and suffer from a depression disorder due to a deterioration in sleep.

Physical Feature, Physiological Character and Behavior Study of Gayal(Bos frontalis)

  • Giasuddin, M.;Islam, M.R.
    • Asian-Australasian Journal of Animal Sciences
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    • v.16 no.11
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    • pp.1599-1603
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    • 2003
  • The physical feature, physiological character and behavior studies were conducted with fifteen newly collected gayals in Bandarban hill tract area of Bangladesh. Their morphology is different from domestic cattle. The range of pulse rate, body temperature and respiration rate were 47 to 75 per minute, 37.78 to $38.88^{\circ}C$ and 20 to 40 per minute, respectively. These physiological values vary with different age group and seasonal variation. In hematological feature, the average findings were RBC $7.01{\pm}0.52$ million/cu.mm, WBC $14.3{\pm}3.69$ thousand/cu.mm, hemoglobin concentration $9.81{\pm}2.25gm%$, PCV $35.86{\pm}3.68%$. In differential WBC count neutrophils $28.23{\pm}1.75%$, lymphocytes $62{\pm}2.05%$, monocytes $4.4{\pm}1.34%$, eosinophils $5{\pm}2.49%$ and basophils $0.4{\pm}0.51%$. In behavior study, the animal shows browsing nature on hill slopes. They are watchful in new environment, become excited and nervous with strangers. Heated female gayals response for mating with domestic bull.

Regression Models Predicting Trunk Muscles' PCSAs of Korean People (요추 부위 인체역학 모델을 위한 한국인 몸통 근육의 생리학적 단면적 추정 회귀 모델)

  • Kim, Ji-Hyun;Song, Young-Woong
    • Journal of the Ergonomics Society of Korea
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    • v.27 no.2
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    • pp.1-7
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    • 2008
  • This study quantified 7 trunk muscles' physiological cross-sectional areas (PCSAs) and developed prediction equations for the physiological cross-sectional area as a function of anthropometic variables for Korean people. Nine females and nine males were participated in the magnetic resonance imaging (MRI) scans approximately from S1 through T8. Muscle fiber angle corrected cross-sectional areas (anatomical cross sectional areas: ACSAs) were recorded at each vertebral level and maximum value of ACSAs were determined as physiological cross sectional area (PCSA). There was a significant gender difference in PCSAs of all muscles (p<0.05). Stepwise linear regression techniques using anthropometric measures (e.g., height, weight, trunk depths and widths) as independent variables were conducted to develop prediction equations for the PCSA for each muscle. For males, six muscles' significant prediction equations (p<0.05) were developed except quadratus lumborum. For females, three prediction equations were developed for psoas, quadratus lumborum, and erector spinae muscles (p<0.05).

Fabrication and Evaluation of Tactile Stimulator Array Using Stacked PZT

  • Yoon, Myoung-Jong;Kwon, Tae-Kyu;Yu, Kee-Ho;Kim, Nam-Gyun
    • 제어로봇시스템학회:학술대회논문집
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    • 2004.08a
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    • pp.171-175
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    • 2004
  • A tactile stimulator array using stacked PZT is fabricated and evaluated in this paper. The purpose of this research is the development of a tactile stimulator to represent the obstacle information for the visually disabled. As a first step of this research, we investigate the physiological characteristics of tactile stimuli and design a tactile stimulator based on the investigated results. Also we evaluated a fabricated tactile stimulator. The prototype of tactile stimulator which has 2x2 tactor elements with 3mm spacing is fabricated using stacked PZT actuator. In order to evaluate the characteristics of this tactile stimulator, physiological experiments are carried out. In the experiment, the threshold of tactile stimulus intensity within a frequency range of 5-500Hz and at various stimulus amplitudes are investigated. According to the obtained experimental result, the input signal of tactile stimulator for the transfer of obstacle information is determined. Also physiological experiments of multi-stimuli recognition such as shift and rotation are carried out.

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Analysis of the Nursing Interventions performed by orthopedic surgery care unit using NIC (NIC 간호중재 분류체계를 이용한 간호중재분석;정형외과 간호단위를 중심으로)

  • Kwon, Mi-Suk;Park, Kyung-Sook
    • Journal of Korean Academy of Nursing Administration
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    • v.8 no.4
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    • pp.655-667
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    • 2002
  • Purpose : This study analysis of nursing interventions and core nursing interventions performed orthopedic surgery care unit. Method : The data were collected from 55 nurses of 4 general hospital from July. 10, 2002 to Aug. 30, 2002. The instrument for this study was the Korean translation of 486 nursing intervention classifications developed by McColskey & Bulechek in 2000. In the 486 nursing interventions 350 nursing interventions were selected 8 among the 10 more than 5 years working group in orthopedic surgery care unit. Self frequency checking performed by 350 nursing interventions were used secondary questionnaire In the orthopedic surgery care unit nurses. Results : 1. The most frequently used nursing interventions domains were "Physiological : basic" and then "Physiological: complex", "Health system" "Behavior", "Family", "Safety". 2. Orthopedic surgery care unit core nursing interventions were performed several times a day by 50% or more of orthopedic surgery care unit and this result were 4 of domain, 11 of class, 26 core nursing interventions. This core nursing interventions were 5 of "Physiological : basic", 17 of "Physiological: complex", 1 of "Safety", 3 of "Health system" and have no "Behavior", "Family". Conclusion : This study analyzed nursing intervention of orthopedics and reestablished nursing intervention concept and I hope this study will be helpful for the nurse to be a professional by applying this to actual clinic, for development in qualified nursing and for establishment nursing information system.

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