• Title, Summary, Keyword: Buffering effect

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The influence of parental strain on the marital adjustment of employed mothers after transition to the parenthood and the buffering effect of social support (부모역할 전환 후 부모로서의 긴장감이 취업모의 결혼적응에 미치는 영향과 사회적 지지의 완충효과에 관한 연구)

  • Koh, Seon-Ju
    • Korean Journal of Human Ecology
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    • v.13 no.5
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    • pp.637-646
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    • 2004
  • The purpose of this study is to examine the relation between parental strain and marital adjustment of employed mothers after their transition to the parenthood, and to investigate buffering effect of social support on the relation. The parental strain variables (physical strain and emotional strain) appear to be significant predictors of marital adjustment for employed mothers with first baby. The analysis on interaction effect indicates that social support can be a positive buffering indicator. A comparison reveals that mothers with high physical strain have significantly higher marital adjustment than those with low strain. But in the context of high social support, the difference of marital adjustment between the two mothers is reduced.

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Effects of Buffering Zone Installation on the Temperature and Humidity of Pig House and Mortality of Weaned Pig (완충공간의 설치가 이유자돈사 온·습도변화 및 자돈 폐사율에 미치는 영향)

  • Lee, Jun-Yeob;Lee, Dong-Hyun;Woo, Saem-Ee;Choi, Hee-Cheol
    • Journal of Animal Environmental Science
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    • v.21 no.3
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    • pp.77-82
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    • 2015
  • This survey was conducted to collect basic data about the effect of buffering zone installation in weaned pig house. Buffering zone was installed either inside or outside of pig house to compare changes of temperature, humidity and air velocity of pig room. The body weight and mortality of weaned pigs in house with buffering zone was also measured. There was no difference in temperature, humidity and air velocity between inside and outside buffering zone. Mortality of weaned pig in house with buffering zone was drastically decreased compare to pigs in house without buffering zone that could be useful to maintain constant temperature and decrease mortality.

Effect of Acid Buffering Capacity and Soil Component Remediation of Soil Contaminated with Phenanthrene using Electrokinetic-Fenton Process (산 완충능력과 토양 성분이 동전기-펜톤 공정에 의한 phenanthrene 오염토양 정화에 미치는 영향)

  • Kim, Jung Hwan;Na, So Jeong;Park, Joo Yang;Byun, Young Deog
    • Journal of Soil and Groundwater Environment
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    • v.18 no.1
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    • pp.129-136
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    • 2013
  • This research was conducted to investigate effects of acid buffering capacity and soil component in treatment of phenanthrene using electrokinetic-Fenton process. In Hadong clay of high acid buffering and low iron oxide content, it was difficult to oxidize phenanthrene due to shortage of iron catalyst and scavenger effect of carbonate minerals. The desorbed phenanthrene conductive to Fenton oxidation was transported toward cathode by electroosmotic flow. However, in Youngdong illitic clay, oxidation of phenanthrene near anode readily occurred compared to Hadong clay due to high iron content and low acid buffering capacity.

Energy Saving Characteristics on Burst Packet Configuration Method using Adaptive Inverse-function Buffering Interval in IP Core Networks (IP 네트워크에서 적응적 역함수 버퍼링 구간을 적용한 버스트패킷 구성 방식에서 에너지 절약 특성)

  • Han, Chimoon
    • Journal of the Institute of Electronics and Information Engineers
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    • v.53 no.8
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    • pp.19-27
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    • 2016
  • Nowadays the adaptive buffering techniques for burst stream packet configuration and its operation algorithm to save energy in IP core network have been studied. This paper explains the selection method of packet buffering interval for energy saving when configuring burst stream packet at the ingress router in IP core network. Especially the adaptive buffering interval and its implementation scheme are required to improve the energy saving efficiency at the input part of the ingress router. In this paper, we propose the best adaptive buffering scheme that a current buffering interval is adaptively buffering scheme based on the input traffic of the past buffering interval, and analyze its characteristics of energy saving and end-to-end delay by computer simulation. We show the improvement of energy saving effect and reduction of mean delay variation when using an appropriate inverse-function selecting the buffering interval for the configuration of burst stream packet in this paper. We confirm this method have superior properties compared to other method. The proposed method shows that it is less sensitive to the various input traffic type of ingress router and a practical method.

Effect of Simulated Acid Solution on Acid Buffering Capacity, Chlorophyll Content and Nutrient Leaching in the Leaves fo 4 Herb Species (4종 촤화류에 대한 pH 수준별 처리가 잎의 완충능력, chlorophyll 함량 및 무기성분 용출에 미치는 영향)

  • 김학윤
    • Journal of Life Science
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    • v.11 no.3
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    • pp.197-202
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    • 2001
  • This study was conducted to investigate the effect of simulated acid solution(SAS) on acid buffering capacity, chlorophyll content and butrient leacking in 4 herb species(Petunia hybrida Vilm, Gomphrena globosa L. Celosia cristat L. Salvia officinallis L) . The acid buffering capacity in the leves was increased in the treatment of pH 3.0 in Celosia L., whereas it was increased at pH 4.0 in Petunia Petunia hybrida Vilm. and Gomprean globosa L.. But, the acid buffering capacity of the leaves did not work at ph 2.0 treatment in 4 herb species. With decreasing pH level, the chlorophyll content of Petunia hybrida Vilm. and Gomphrena globosa L. Was markedly decreased than that of Gelosia cristata L. and Savia officinalis L. As the pH levels decreased from 5.6 to 2.0 the nutrient leaching from leaves was significantly increased in 4 herb species. In pH 4.0 and 5.6, the concentrations of nutrient leaching from leaves were higher in Perunia hybrida Vilm. and Gomphrean globosa L. than Gelosia cristata L. and Salvia officinalis L., Based on the results, there was a great differences in response to SAS among the 4 herb species. Im general, Gelosia cristata L. and Salvia officinalis L. represented a higher tolerance to SAS Petunia hybrida Vilm, and Gomphrena globosa L..

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Stress-Buffering Effects of Social Support and Social Problem Solving Skills in the Adjustment of Children (아동의 적응에 있어서 사회적 지지와 사회적 문제해결 기술의 스트레스 완충 효과에 대한 연구)

  • Kang, Seong Hee;Lee, Jae Yeon
    • Korean Journal of Child Studies
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    • v.13 no.2
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    • pp.175-188
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    • 1992
  • This study investigated the relation between stressful life events and adjustment in elementary school children, with particular emphasis on the potential main and stress-buffering effects of social support and social problem solving skills. 4-6 graders (N=170) completed the Social Support Appraisals Scale(SSAS) and social problem solving skills task. The SSAS is a 31-item measure that taps the child's perceptions or appraisals of family, peer, and teacher support. Their parents provided ratings of stress in the child's environment and ratings of the child's behavioral adjustment. Teachers provided ratings of the child's behavioral and academic adjustment. Hierarchical multiple regression analyses and graphic display were used to analyze the data. The major findings were that (1) The results for parent-rated problems supported a stress-buffering model for family support and problem solving. (2) The results for teacher-rated problems were consistent with the stress-buffering model of social support. (3) The results for grade-point average supported a main effect model for problem solving. peer support, and family support. In addition, teacher support had the strongest stress-buffering effect on grade-point average.

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The Buffering Effect of Family Cohesion in the Relationship between Depression and Suicidal Risk (우울감과 자살위험간의 관계에서 가족결속도의 완충효과)

  • Kim, Yun-Jeong;Kang, Hyun-Jung
    • The Journal of the Korea Contents Association
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    • v.14 no.3
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    • pp.241-249
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    • 2014
  • The aim of this paper is to examine the buffering effect of family cohesion in the relationship between depression and suicidal risk among adolescents, adults, and the elderly. To achieve the research aim, surveys were conducted in 10 cities across the country for 399 adolescents, 473 adults, and 370 elderly from May to August 2010. Major findings of the data analysis are as follows. First, while, in the relationship between depression and suicidal risk, the elderly were the highest, followed by adolescents and adults in descending order, in family cohesion, adults were the highest, followed by the elderly and adolescents. Second, the analysis of the buffering effect of family cohesion in the relationship between depression and suicidal risk showed that it was significant only for adolescents and adults, which means that for those two groups family cohesion alleviates the effects of depression on suicidal risk, demonstrating the necessity of strengthening family cohesion to reduce suicides among the two groups of people. But, for the elderly for whom family relationship is more important than any other age group, the buffering effect of family cohesion in the relationship between depression and suicidal risk was not proved. The interpretation of this phenomenon is given in the part of the paper where the characteristics of the suicide of the old age group is discussed.

Molasses clarifying method used by lime-phosphate for yeast culture (효모배지용 당밀의 청징법에 관하여)

  • 임억규
    • Korean Journal of Microbiology
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    • v.19 no.3
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    • pp.121-127
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    • 1981
  • The constituents of molasses and effect of pH precipitate formation in molasses solution, vary according to its producing districts. The formation of precipitation is not so changeable in the range of buffering zone of molasses solution(pH4.3-6.3) in philippine molasses according to the change of pH value. On lower or higher than the range of buffering zone, the precipitation is increased from pH 4.3 to 2.8 and from 6.3 to 8.1, it is decreased when pH value is lower or higher than the pH value range. For molasses clarifying, it had better adjust the pH of molasses solution to neutral or weak alkali range out of the alkai side of the buffering zone, with lime solution. And then, add the calcium super phosphate solution to pH value of alkali side in buffering zone, as much as the pH of clarified molasses solution can reach to middle value in buffering zone. For the equilibrium of pH value on clarifying molasses, it takes plenty of time more than 6 hours.

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Effect of pH and Buffering Potential of Important Domestic Woods on the Gelation Time of Urea-Formaldehyde Resin (주요국산재의 pH 및 Buffering Potential이 요소수지접착제의 Gel시간에 미치는 영향)

  • 권진헌;한태형;류경산
    • Journal of the Korea Furniture Society
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    • v.10 no.1
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    • pp.43-49
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    • 1999
  • The pH and buffering potential for water extract of seven hardwoods and three softwoods were determined. The pH values ranged from 3.81 to 5.51 for hardwoods and 4.08 to 5.49 for softwoods. The gelation time for a urea-formaldehyde resin for each woods was determined and found to be a range of one minute thirty seven seconds to two minutes thirty nine seconds. Results shows that gelation time of a urea-formaldehyde resin was directly correlated to the pH and inversely correlated with acid buffering potential for seven hardwoods and three softwoods aqueous extracts

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Buffering Capacity of Dairy Powders and Their Effect on Yoghurt Quality

  • Kim, Miji;Oh, Sejong;Imm, Jee-Young
    • Food Science of Animal Resources
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    • v.38 no.2
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    • pp.273-281
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    • 2018
  • Preheating conditions (low-, medium-, and high heat-) did not significantly affect the buffering capacity (BC) of skim milk powder (SMP), whereas the level of demineralization significantly affected the BC of whey powders (WP). Heat treatment ($85^{\circ}C$ for 30 min) of both SMP and WP (90% demineralized) mixtures (88:12, 76:24, 64:36 and 52:48; SMP:WP) resulted in a reduced BC, and the extent of this reduction increased with the proportion of WP increased in the samples. High-buffering milk prepared by the addition of phosphate salts (40 mM $NaH_2PO_4$ and 60 mM $Na_2HPO_4$) delayed the rate of pH decline during yoghurt fermentation. The high-buffering yoghurt showed a significantly higher water holding capacity (WHC) than that of control yoghurt (p<0.05), as well as a more uniform and interconnected microstructure with small pore sizes than those of control yoghurt. No significant differences were found between high-buffering and control yoghurt regarding the viable bacterial counts of starter. The manipulation BC can potentially improve the quality characteristics of yoghurts, such as WHC and texture.