• Title/Summary/Keyword: Blood pressure

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A Study on the Optimal Clothing Weight in an Air Conditioned Office in Summer (여름철 냉방실내의 적정착의량에 관한 연구)

  • Kim Sun Young;Lee Soon Won
    • Journal of the Korean Society of Clothing and Textiles
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    • v.9 no.3
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    • pp.45-51
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    • 1985
  • The purpose of this study is to research into the thermal condition and the weight of clothes suitable for the officers engagged in light works in an air-conditioned room in summer. The Major findings are as follows: 1. Thermal conditions of the working environment are $24.5^{\circ}C$ (Dry bulb temp.), $68\%$ (Relative humidity) and 2.6m/sec (Air Velocity). 2. Total clothing weights are 416.6 g/$m^2$ (male) and 340.9 g/$m^2$ (female). Underwear weights are 96.8g/$m^2$ (male) and 85.1g/$m^2$ (female). The latter turned out to be statistically significant in Sexual difference. 3. Means of the thermal sensation are 3.0 (comfortable; male) 2.7 ('Slightly cool' -'Comfortable'; female) and the relationship between clothing weights and thermal sensation proves to be significantly correlated in the case of female. 4. $66.7\%$ of the women and $37.1\%$ of the men feel sensation of coldness at the body's specific area and $79.5\%$ of the women and $54.3\%$ of the men reveals air-conditioning disturbance. 5. As the thermal sensation is close to 'cool-cold', sensation of coldness or air conditioning disturbance are showed up more frequently which is reversely related with weight of under-wear. It is also proved that air conditioning disturbances are influenced by sexual difference in addition to sensation of coldness and thermal sensation. 6. According to the result of experiment, we can have the idea that at condition $X_1$, the drop of limbs' skin temp. is remarkable. At condition $X_2$ skin temp. for distal limbs and mean skin temp. are raised and the falling degree is similar. At condition $X_3$, mean skin temp. and distal skin temp. are remarkably raised, and the falling degree decreases and the beats of pulse rate increase and diastoric blood pressure is lowered.

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An implementation of NDIR type $CO_2$ gas sample chamber and measuring hardware for capnograph system in consideration of the time response characteristics (시간응답특성을 고려한 2광원 1센서 방식의 capnograph 시스템용 NDIR식 $CO_2$ 가스 챔버 설계 및 측정 회로의 구현)

  • Park, I.Y.;Lee, I.K.;Lee, S.K.;Kang, K.M.;Kang, S.W.;Cho, J.H.
    • Journal of Sensor Science and Technology
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    • v.10 no.5
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    • pp.279-285
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    • 2001
  • The capnograph system for determining the partial pressure of carbon dioxide in the blood of a patient was developed based on the NDIR(non-dispersive infrared) absorption technology. NDIR gas analyzing method requires an optical absorption chamber and signal processing hardware. In this paper, we have designed and implemented NDIR type $CO_2$ gas chamber in consideration of the time response characteristics and lamp chopping frequency. And we have implemented signal processing hardware using two infrared sources to reduce the thermal background effect. The implemented gas chamber and signal processing hardware were tested in the temperature variation experiment and human expiratory experiment. The results showed that the system could produce a stable output signal and a good $CO_2$ gas concentration curve like a typical capnogram.

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Analysis of Dietary Intake Status and Risk of Metabolic Syndrome According to White Rice Consumption in Korea: Basted on Data 1st (1998), 4th (2007~2009), 6th (2013) Korean National Health and Nutrition Examination Survey (KNHANES) (백미밥의 섭취에 따른 영양과 식품 섭취 실태 및 대사증후군 위험수준: 1기(1998), 4기(2007~2009), 6기(2013) 국민건강영양조사 자료를 이용하여)

  • Song, Fang-Fang;Jang, Jin-A;Kim, Yang-suk;Yoon, Hei-ryeo;Cho, Mi-Sook
    • Journal of the Korean Society of Food Culture
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    • v.30 no.5
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    • pp.682-694
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    • 2015
  • The purpose of this research was to investigate the relationship between white rice consumption and dietary intake, the risk of metabolic syndrome in Korean based on $1^{st}$ (1998), $4^{th}$ (2007~2009), $6^{th}$ (2013) KNHANES. This study included 25,799 subjects who were age 10 or over. Three groups(low, medium, high) were divided according to white rice consumption (per day). In the low group, the meat and oil intake were significantly higher than the high group. In the $1^{st}$ survey year, the BMI, waist circumstances, hypertriglyceridemia and fasting blood glucose in the high group were higher than other groups, however the $4^{th}$ and $6^{th}$ survey year showed no significant results. In the $1^{st}$ survey year the risk of waist circumstances was higher in the high white rice consumption group and also had high risk with hypertriglyceridemia. Since the lower white rice consumption in $4^{th}$ than $1^{st}$ survey year we found no significant results. But in the 6th survey year with the lowest white rice consumption the risk of high diastolic pressure was reduced in high group. Because continuously reduced white rice consumption meantime showed more intake of meat and oil, it can be concluded that defensive effects with the Korean health.

Effects of Aquarobics on Metabolic Syndrome and Health Fitness in Abdominally Obese Elderly Women (아쿠아로빅 운동이 복부비만 노인여성의 대사증후군 및 건강체력에 미치는 영향)

  • Park, Young-Ah;Kim, Dong-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.8
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    • pp.5180-5188
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    • 2015
  • The purpose of this study was to investigate the effects of a 12-weeks aquarobics on metabolic syndrome risk factors and health fitness in 25 abdominally obese elderly women. As the results, while waist circumference(87.40/82.76cm, p<.01) decreased, HDL-C(41.13/45.42mg/dl, p<.05) increased after the exercise program. Blood pressure and TG, however, decreased with no significance. And while muscle strength increased(17.06/19.08kg, p<.05), the increase in flexibility, muscle endurance, and cardiopulmonary endurance and the decrease in body fat showed some positive effects of the exercise program. In conclusion, we found that the aquarobics improves the aging-induced deterioration in the muscular skeletal function by lowering abdominal obesity and improving metabolic syndrome and physical fitness for health. In addition, the aquarobics can be an effective alternative to an aerobics or a resistance exercise on the ground.

Measurement of Worker's Physiological and Biomechanical Responses during the Cherry Tomato Harvesting Work in a Greenhouse (온실에서 방울토마토 수확작업시 작업자의 생리학적 및 생체역학적 반응 측정)

  • SeonWoo, Hoon;Lim, Ki-Taek;Kim, Jang-Ho;Son, Hyun-Mok;Chung, Jong-Hoon
    • Journal of Biosystems Engineering
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    • v.36 no.3
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    • pp.223-230
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    • 2011
  • Physiological signals such as body temperature, heart rate, blood pressure and heart rate variability and biomechanical workload for stress analysis were investigated during the cherry tomato harvesting work in a greenhouse. The skin temperatures raised $0.05^{\circ}C$/min, $0.03^{\circ}C$/ min, and $0.08^{\circ}C$/min in standing, stooping and squatting postures, respectively. Breath rate significantly increased from 18 to 28 breaths/min during the cherry tomato harvesting work. As the heart rate during the work ranged from about 72 to 110 beats/min (bpm), the cherry tomato harvesting work appeared to be a light intensity task of less than 110 bpm. The worker's average energy consumption rate in three positions during 43 min working time was 65.74 kcal (91 kcal/h in 70 kg). This was a light intensity of work, compared to 75 kcal/h in 70 kg of basic metabolic energy consumption rate of a worker with 70 kg weight; The maximum shear force on the disk (L5/ S1) due to static workload in the cherry tomato harvesting work was 446 N in the stooping posture, 321 N in the squatting posture and 287 N in the standing posture. Acute stress index expressed with the heart rate variability, increased parasympathetic activation up to about 70 while workers were doing most agricultural work in this study. This study provided a system to measure quantitatively workers' physiological change, kinematics and kinetic factors without any restrictions of space in the greenhouse works.

The Effect of Nutritional Management and Exercise on Serum Homocystein Level and Antioxidant Intake in Middle Aged Obese Women (영양관리와 운동이 중년 비만여성의 혈중 호모시스테인 수준과 항산화 영양소 섭취에 미치는 영향)

  • Han, Jung-Soon;Kim, Ae-Jung
    • The Korean Journal of Food And Nutrition
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    • v.27 no.3
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    • pp.470-477
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    • 2014
  • The purpose of this study was to investigate the association of homocysteine and antioxidant nutrients with obesity in Korean middle aged women. The study subjects included were middle-aged obese women (n=36) whose body mass index (BMI) was greater than $25kg/m^2$. A total of 36 participants were randomly divided into two groups. They were assigned to either the Nutritional Management and Exercise (NME) program or the Exercise Management (EM) program, which were both conducted for 3 months. We measured serum homocysteine, total cholesterol and HDL cholesterol levels of the participant. We also measured the dietary intakes of antioxidant nutrient, cholesterol, body weight, body mass index, blood pressure, and $VO_2$. At the end of both programs, please confirm this change. It was unclear when these measurements were shown to have decreased. The body weight and BMI of NME group were decreased compared to those of EM group. The serum total cholesterol levels of the participants in NME group were significantly decreased, in contrast to EM group. Also, serum homocysteine levels of NME group participants were decreased compared to EM group, but the difference was not statistically significant. In the NME group, there were significant differences in the change of dietary cholesterol and vitamin C intake. These results showed that participating NME program will continuously promote the healthy status of the middle aged obese women, compared to participating only in the EM program.

Angiotensin- I Converting Enzyme Inhibitory Properties of Bovine Casein Hydrolysates in Different Enzymatic hydrolysis Conditions (효소가수분해 조건에 따른 우유 케이신의 Angiotensin-I 전환효소 저해효과)

  • 김현수;인영민;정석근;함준상;강국희;이수원
    • Food Science of Animal Resources
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    • v.22 no.1
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    • pp.87-93
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    • 2002
  • Angiotensiri-I converting enzyme(ACE) catalyst the removal of the C-terminal dipeptide from the angiotensin-I to give the angiotensin-II, a potent peptide that causes constriction of regulation of blood pressure. Recently, ACE inhibitor peptides have been isolated from enzymatic digests of food protein. The aim of this study was to identify bovine casein hydrolysates with ACE inhibitory properties in different enzymatic hydrolysis conditions. The casein were hydrolyzed neutrase, alcalase, protamax, flavourzyme, premed 192, sumizyme MP, sumizyme LP and pescalase alone and with an enzyme combination. Premed 192 produced ACE inhibitory peptides most efficiently. In order to ACE inhibitory peptide produced enzymatic hydrolysis condition were premed 192 added to casein ratio of 1:100(w/w), and incubated at 47$\^{C}$ for 12hrs. Casein hydrolysate gave 50% inhibition(IC$\_$50/ value) of ACE activity at concentration with 248ug/ml(general method) and 265ug/ml(pretreatment method) respectively.

Study on Nonlinearites of Short Term, Beat-to-beat Variability in Cardiovascular Signals (심혈관 신호에 있어서 단기간 beat-to-beat 변이의 비선형 역할에 관한 연구)

  • Han-Go Choi
    • Journal of Biomedical Engineering Research
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    • v.24 no.3
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    • pp.151-158
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    • 2003
  • Numerous studies of short-term, beat-to-beat variability in cardiovascular signals have used linear analysis techniques. However, no study has been done about the appropriateness of linear techniques or the comparison between linearities and nonlinearities in short-term, beat-to-beat variability. This paper aims to verify the appropriateness of linear techniques by investigating nonlinearities in short-term, beat-to-beat variability. We compared linear autoregressive moving average(ARMA) with nonlinear neural network(NN) models for predicting current instantaneous heart rate(HR) and mean arterial blood pressure(BP) from past HRs and BPs. To evaluate these models. we used HR and BP time series from the MIMIC database. Experimental results indicate that NN-based nonlinearities do not play a significant role and suggest that 10 technique provides adequate characterization of the system dynamics responsible for generating short-term, beat-to-beat variability.

Estimation of Tension Status for Alcohol Dependent Patients using Biofeedback Training and Fuzzy Theory (피지이론과 바이오피드백을 이용한 주정중독증 환자의 긴장도 평가)

  • 성홍모;시재우;윤영로;윤형로;박진한;신정호
    • Journal of Biomedical Engineering Research
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    • v.20 no.2
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    • pp.191-198
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    • 1999
  • Biofeedback training is one of physiological self control methods for patients who has psychological problem and rehabilitational problem. It has been used to control blood pressure, heart rate, peripheral temperature, respiration, electromyography (ENG), and other biological signals-ENG, respiration, heat rate, peripheral temperature, skin conductance level-was developed in house. We applied this system to alcohol dependent patients to perform biofeedback training. In this experiment, the relaxation biofeedback training for alcohol dependent patient was carried out and the tension state for the change of biological signals were estimated using the fuzzy theory after relaxation biofeenback training. Eight alcohol dependent patients were agreed to participate in this experiment. Result showed that 1) the tension degree of patients were higher than the tension degree of normal subject. 2) The tension degree of patients were decreased as the training numbers were increased.

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Peptide Inhibitors for Angiotensin I Converting Enzyme from Corn Gluten Digests. (옥수수 글루텐 효소 가수분해물의 Angiotensin I Converting Enzyme 활성 저해 펩타이드의 정제)

  • 오광석;이동건;홍정운;성하진
    • Microbiology and Biotechnology Letters
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    • v.31 no.1
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    • pp.51-56
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    • 2003
  • The angiotensin I converting enzyme (ACE) has an important role in the maintenance of blood pressure. The ACE inhibitory activities of foods have recently been studied. We tried to isolate ACE inhibitory peptides from the Flavourzyme (FZ), Pescalase (PE), and Thermolysine (TH) protease digests of corn gluten, which was restricted to the use the source of food for digestion problem. The FZ, PE, TH/PE protease hydrolyzed corn gluten and the inhibitory activities of the hydrolyzates for ACE were measured. Major fractions were isolated from the digests using ODS chromatography after treating with ethanol in step gradient. The ACE inhibitors were further purified by Bio-Gel P-2 column and reverse phase HPLC. Five inhibitory peptides were isolated. Their amino acids were sequenced as LPF ($IC_{50}$ = 40$\mu$M), GPP ($IC_{50}$ = 17.6$\mu$M), PNPY ($IC_{50}$ = 30.7$\mu$M), SPPPFYL ($IC_{50}$ = 63 $\mu$M), and SQPP ($IC_{50}$ = 17.2$\mu$M).