• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.11
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• pp.3458-3464
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• 2009

This study was conducted to investigate the relationship between maximum oxygen uptake and its related factors including body measurement and vascular compliance. The subjects of our study were 43 males and 53 females aged 40 to 59 who were visited in military health center. The main results were that 1.the degree of obesity had significantly negative correlation to vascular compliance in male, and waist-hip ratio in female. 2. The degree of obesity, body mass index, waist-hip ratio and body fat percent had significantly negative correlation to maximum oxygen uptake in male, and waist-hip ratio & body fat percent in female. 3. Maximum heart rate had significantly positive correlation to maximum oxygen uptake in male, and vascular compliance & maximum heart rate in female. 4. In multiple regression analysis which maximum oxygen uptake was as dependent variable, body fat percent, vascular compliance and maximum heart rate were significant variables for both male and female. In conclusion, Maximum oxygen uptake of some rural people age 40 to 59 were affected by various factors such as body fat percent, vascular compliance, and maximum heart rate.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.19 no.3
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• pp.125-129
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• 2009

The preparation and characterization of niobium carbide crystallites were investigated in this study, and in particular, the effect of preparation conditions were studied on the synthesis of niobium carbides crystallites. For this purpose, various characterization techniques including x-ray diffraction, BET surface area, and oxygen uptake measurements were employed to characterize the synthesized niobium carbide crystallites. The niobium carbide crystallites were prepared using niobium oxide and methane gas or methane-hydrogen mixture. Using x-ray diffraction a lattice parameter of $4.45{\AA}$ and a crystallite size ranging from $52{\AA}$ to $580{\AA}$ was found. BET surface areas ranged from $3.2\;m^2/g$ to $16.6\;m^2/g$ and oxygen uptake values varied from $0.5{\mu}mol/g$ to $6.1{\mu}mol/g$. It was observed that niobium carbide crystallites were active for ammonia decomposition reaction. While the BET surface area increased with increasing the oxygen uptake, the conversion of ammonia decomposition reaction decreased. These results indicated that the ammonia decomposition over these materials was considered to be structure-sensitive.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2002.04a
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• pp.323-326
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• 2002

Oxygen uptake characteristics of soil microcosm added by hydrocarbon degrading bacteria screened from polluted site in Korea was studied. The degradation of TPH was enhanced by additon of nononionic surfactants. The amount of oxygen consumed was decreased at higher concentration. The degradation rate of hydrocarbon was decreased by increasing the hydrcarbon concentration.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.38 no.2
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• pp.117-120
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• 1993

This experiment was conducted to elucidate the characteristics of dissolved oxygen uptake and germination of California rice varieties, L-202(Long grain), M-202(Medium grain), S-201(Short grain), Italiconaverneco(Long grain) and Korean variety, Hwaseongbyeo under $25^{\circ}C$ water condition. The distilled water was saturated with oxygen by using air pump for 2 hours. Dissolved oxygen uptake of rice seed was measured everyday by using the oxygen electrode during 4 days from soaking to coleoptile and radicle appearance. Total dissolved oxygen uptake was 211.7${\mu}g$ per grain in Italiconaverneco during that period 179.5${\mu}g$ in S-201, 144.3${\mu}g$ in Hwaseongbyeo, 140.4 in L-202, 135.8$\mu\textrm{g}$ in M-202. The ratio of coleoptile and radicle appearance showed the highest value in Italiconaverneco, and next were S-201 and L-202. The coleoptile and radicle showed the longest length in Italiconaverneco, and next were S-201 and Hwaseongbyeo.

• Journal of Korean Society of Water and Wastewater
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• v.21 no.3
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• pp.279-285
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• 2007

Toxicity evaluations using oxygen uptake rate (OUR) on activated sludge process were investigated. On toxicity evaluations of heavy metals, all toxicants in experiments decreased OUR with respect to the concentrations of the toxicants, while high toxicities with cyanide and mercury were observed respectively. On toxicity evaluations of composite heavy metals, composite toxicities had similar results as to the total sum of each toxicants that presents accurate toxicity evaluation using OUR. From these results, it is concluded that activated sludge is effective indicator for toxicity evaluation on wastewater of biological treatment plants.

• Journal of the Ergonomics Society of Korea
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• v.3 no.1
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• pp.19-24
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• 1984

As in dynamic muscular activity, to support one's body may be regarded as the static workload. An examination is made of the relationship between heart rate and oxygen uptake of three male graduate students in static working postures (sitting, squatting and standing). Though it has been believed that there exists a linear relationship between heart rate and oxygen uptake, this thesis shows that both have no relationship in the case of static postures, and that they may depend upon the characteristics of postures rather than the static workload. These results are discussed analytically. The additivity between static body postures and holding up one's hands at his maximum height is tested. Compared with the sum of energy expenditure in balancing one's body and holding up hands, the net rate of energy expenditure in performing them simultaneously is equivalent. In the case of static postures, the importance of the awareness of the characteristics and relevance of the measures is discussed.

• The Korean Journal of Zoology
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• v.11 no.3
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• pp.75-82
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• 1968

The effects of x-irradiation on the utilization of glucose, succinate, citrate and $\\alpha$-ketoglutarate, on the response of the cell metabolism to $NaN_3$ and DNP, and on the uptake of lysine in the presence or absence of the metabolitesor the inhibitors were studied using HeLa cells and the results are summarized as follows: 1. 200r of x-irradiation had no immediate effect on the oxygen consumption of cells. 2. The oxygen consumption was greatly stimulated by succinate, $\\alpha$-ketoglutarate and citraed and in decreasing order and x-irradiation caused no remarkable change in this order. 3. The respiratory response of the cell to the metabolic inhibitors seems to be altered by x-irradiation. 4. The initial rate of the uptake of lysine was markedly retarded and the accumulation of lysine in the cell was decreased by irradiation. 5. Glucose increased the lysine uptake whereas succinate had no effect and citrate and $\\alpha$-ketoglutarate reduced the absorption. X-irradiation did not alter this tendency. 6. The inhibitory effects of $NaN_3$ and DNP on the lysine uptake were quite different from those seen in the oxygen consumption.

• Journal of Korean Society of Environmental Engineers
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• v.33 no.9
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• pp.630-635
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• 2011

As this study was estimation of factors of rapid OUR (Oxygen Uptake Rate) monitoring method. Experiment for estimating factors of optimal microorganism activity was carried out in this study. In addition to comparison and estimation of SCOD variation by OUR variation using real wastewaters. In consequence OUR value was highest when F/M ratio, pH and temperature were 0.03~0.05, 6.0~8.5 and $20{\sim}30^{\circ}C$ respectively. Oxygen consumption by nitrification was incomplete. OUR variation of SCOD was recognizable difference of degradable rate at before and after of inflection point OUR. This study used an experimental method for real time prediction of the influent of the sewage treatment plant for optimal operation is expected to be able to do.

• Microbiology and Biotechnology Letters
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• v.35 no.3
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• pp.226-230
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• 2007

In order to achieve high-level expression of interferon-${\alpha}1$ (IFN-${\alpha}1$) during fed-batch fermentation of recombinant E. coli, effects of oxygen supply and induction temperature on the expression of recombinant proteins were evaluated. Supplementation of oxygen and its transfer into cells is one of the most important parameters involved in the design and operation of mixing-sparging equipment for bioreactors. Generally, higher oxygen supply stimulates cell growth of aerobic microorganism and consequently the amount of products is increased. In this study, the optimum aeration strategy for the higher production of IFN-${\alpha}1$ during fed-batch fermentation of recombinant E. coli was surveyed. The growth of the cells was also monitored with four different concentrations of dissolved oxygen (DO; limiting, 20%, 35%, 50%) conditions. The DO was controlled by varying aeration rates of air and pure oxygen. Oxygen uptake rate (OUR) and specific oxygen uptake rate (SOUR) were evaluated and compared for the enhanced growth and induction of the cells and IFN-${\alpha}1$, respectively. We confirmed that increased DO by additional oxygen supply, up to 35%, can improve the production of IFN-${\alpha}1$ during the fermentation.

• Fashion & Textile Research Journal
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• v.16 no.3
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• pp.456-461
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• 2014

The objective of this study is to give PP(polypropylene) fabric a good affinity for water. Oxygen plasma was treated to PP fabrics in a commercial glow discharge reactor with different RF power, discharge pressure, and reaction time. The PP fiber surfaces were characterized by the measurement of contact angle and ESCA. A JEOL scanning electron microscope was used to observe the surface morphology of fibers. The spontaneous water uptake amount of PP fabrics was determined by the demand wettability test. To determine the effect of aging on the surface properties of $O_2$ plasma treated PP, all the above measurements of the samples were carried out after 1, 7, 30, 60, and 150 days. The results are as follows. The PP fiber surfaces treated by $O_2$ plasma treatment have a chemical composition that consisted of various oxygen containing polar groups. Consequently, the contact angles of the treated PP fibers decreased, which improved the water uptake rate of PP fabrics. Surface roughness of the treated PP affected the fabric wettabiity as well. Wettability of the treated PP decreased and leveled off with aging. The $O_2$ plasma treatment is a simple and effective method to increase the water uptake rate of PP fabrics.