생활체육 동호인과 일반인의 건강체력연령 비교,분석

이만균 ( Man Gyoon Lee ),김형돈 ( Hyung Don Kim ),송종국 ( Jong Kook Song ),공성아 ( Sung A Kong ),성순창 ( Soon Chang Sung ) 한국스포츠정책과학원(구 한국스포츠개발원) 2005 체육과학연구 Vol.16 No.3

지금까지 국가적인 차원에서 생활체육의 활성화를 위하여 상당한 투자를 해 왔음에도 불구하고 생활체육 동호인 조직에서 활동하는 사람들의 효과를 과학적으로 입증한 자료가 매우 제한적이었다. 따라서 본 연구에서는 2년 이상 활동해 온 생활체육 마라톤 동호인과 최근 2년간 규칙적인 운동에 참여하지 않은 일반인의 건강체력연령(vital age)을 산출하여 실제 연령과의 차이를 두 집단 간에 비교하고자 하였다. 생활체육 동호인 30명과 일반인 20명을 선정하여 Tanaka et al. (1990, 1993)이 개발한 건강체력연령 산출 공식에 의거하여 필요한 요소를 측정하였다. 남자의 경우 견갑골 하부 피부두께, 수축기 혈압, 총콜레스테롤, 중성지방, 젖산역치 수준에서의 산소섭취량, 젖산역치 수준에서의 심박수, 사이드 스텝, 눈감고 외발서기, 그리고 1초 강제 호기량을 측정하였고, 여자의 경우 복부 둘레, 수축기 혈압, 젖산역치 수준에서의 산소섭취량, 젖산역치 수준에서의 심박수, 총콜레스테롤, 저밀도 지단백 콜레스테롤, 중성지방, 헤마토크리트, 사이드 스텝, 눈감고 외발서기, 1초 강제 호기량을 측정하였다. 이 요소들을 공식에 대입하여 건강체력연령을 산출하여 다음과 같은 결과를 얻었다. 생활체육 동호인과 일반인의 건강체력연령과 실제 연령의 차이를 비교한 결과, 실제 연령과 건강체력연령의 차이가 남자의 경우 생활체육 동호인이 -20.64±6.1세, 일반인이 +1.85±12.6세, 여자의 경우 생활체육 동호인이 -13.13±4.87세, 일반인이 -0.1677±5.1세로 나타나 생활체육 동호인의 건강체력연령이 실제 연령에 비하여 유의하게 낮은 것으로 나타났다. 이상의 결과를 토대로 볼 때, 지속적으로 생활체육에 참여하고 있는 생활체육 동호인의 건강체력 수준이 일반인에 비하여 매우 우수한 것으로 나타났다. 본 연구의 결과에서 나타난 명확한 생활체육의 효과를 범국가적으로 홍보함으로써 일반 국민들이 생활체육에 참여하도록 적극적으로 유도하는 노력이 뒤따라야 할 것으로 판단된다. Although a great deal of investments have been put for the enhancement of the Sports for all by the government, the scientific data of effectiveness of sports club activities have been very limited in Korea. This study was designed to compare the difference between vital age and chronological age in sports club participants (SCP) and general individuals (GI) who have not participated in systematic exercise training. 30 SCP and 20 GI were volunteered to participate in the study as subjects. The equations for the vital age developed by Tnanka et al. (1990, 1993) were utilized in this study. The components for the equation were measured for all subjects. Subscapular thickness, systolic blood pressure, total cholesterol, triglyceride, VO2LT, HR LT, side step, one leg standing with eyes closed, and FEV1.0 were measured for men, abdominal circumference, systolic blood pressure, VO2LT, HR LT, total cholesterol, LDL-C, triglyceride, hematocrit, side step, one leg standing with eyes closed, and FEV1.0 were measured for women The differences between vital age and chronological age of SCP and GI were compared. The results of this study were as follows: The differences between vital age and chronological age were -20.64±6.10yrs for male SCP, -13.13±4.87yrs for female SCP, +1.85±12.60yrs for male GI, and -0.17±5.10yrs for female GI, indicating that the vital age of SCP were lower than chronological age of SCP. It was concluded that the vital age of SCP was lower comparing to the results of GI. The results supporting the effectiveness of sports club activities would be published to the people in national-wide.

모녀간 골밀도에 미치는 유전적, 환경적 인자의 영향

이창원 ( Chang Won Lee ),박근용 ( Keun Yong Park ),이영실 ( Young Sil Lee ),유석동 ( Seok Dong Yoo ),안준협 ( Jun Hyeop An ),공옥녀 ( Ok Nyu Kong ),손석민 ( Seok Man Son ),김인주 ( In Ju Kim ),김용기 ( Yong Ki Kim ) 대한폐경학회 2003 대한폐경학회지 Vol.9 No.3

연구의 목적 : 골밀도는 주로 유전적 인자에 의해 결정된다고 알려져 있다. 외국의 여러 쌍생아 및 가계 연구에서 골밀도에 미치는 유전적 인자의 영향력은 약 50-85%로 알려져 있다. 그러나 한국인에서 골밀도에 미치는 유전적인자의 영향력의 크기는 잘 알려져 있지 않다. 이에 저자들은 20대 젊은 여성과 그들 어머니를 대상으로 하여 골밀도에 미치는 유전적 소인과 환경적 인자의 영향력을 확인하고자 하였다. 연구재료 및 방법 : 건강한 평균 나이 20±1.2세의 여대생 95명과 평균 나이 45±2.7세의 폐경이 되지 않은 그들의 어머니를 대상으로 하였으며 이중에너지 흡수계측기(DXA, Hologic QDR 4500 A.)를 이용하여 요골원위부, 제 2-4 요추 및 대퇴골의 골밀도를 측정하였다. 대상자들은 설문지를 통해 흡연력, 음주력, 월경력, 신장, 체중, 체질량짓, 반정량적인 칼슘 섭취량과 및 일일 총열량 소모량을 얻었다. 모녀간 골밀도의 상관관계를 구하기 위해 골밀도에 영향을 주는 인자들인 나이, 신체 계측치 및 환경적 인자들을 선형 회귀 분석을 통하여 보정하였다. 결과 및 결론 : 나이와 키, 몸무게를 보정하였을 때 어머니의 Z-score와 딸의 골밀도와의 상관계수는 0.242에서 0.278 사이였으며 칼슘섭취량과 육체적 활동량까지 보정하였을 때 상관계수는 0.234에서 0.289 사이였다. 이 수치는 딸의 골밀도에 미치는 어머니와 아버지의 유전적 영향력이 동일하다는 가정 하에 유전적인 영향력의 크기가 46-58%임을 시사한다. 결론적으로 최대골량은 유전적 인자에 의해 주로 결정된다는 사실을 알 수 있었으며 유전적 인자의 영향력을 제외한 부분이 환경적 인자와 같은 비유전적인 요소의 영향력이라 가정한다면 골밀도에 미치는 환경적 인자의 영향력도 중요할 것으로 생각된다. Objectives: It is well known that genetic factors play major role in the regulation of bone mineral density(BMD). The heritability of BMD has been estimated to lie between 50% and 85% in twin studies. Family-based studies have also yielded strong heritability estimates for BMD. But heritability of BMD in Korean people has not been well estimated. So we evaluated the influences of heredity and environmental factors on BMD in Korean mother-daughter pairs. Method : BMD of the lumbar, femur and wrist was measured in 95 healthy Korean mother-daughter pairs by dual-energy absorptiometry. Mothers and daughters were aged 20+ 1.2 and 45±2.7 years, respectively. Similarities in selected life-style factors thought to influence BMD, such as physical activity, calcium intake were also evaluated. Result : Correlation coefficients between the mother Z score and daughter BMD ranged from 0.28 to 0.31. Adjustm ent of bone density for age, height, weight, and life-style factors yielded heritability estimates for the three skeletal sites between 0.23 and 0.29. This would be equivalent to 46-58% heritability from both parents if there are similar contributions from both parents Conclusion : These observations provide support for a significant contribution of heridity to bone density. (However, magnitude of estimates derived from this study were lower as compared with other studies.) Also an individual`s life-style may account for a potentially large proportion of the non-heritable variance in bone density.

Cation Exchange Capacity in Korean Soils Determined by the Copper(II) Acetate Spectrophotometry Method

Park, Won-Pyo,Chang, Kong-Man,Koo, Bon-Jun,Hyun, Hae-Nam 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.6

Copper(II) acetate spectrophotometry method (CASM) was used for the rapid and convenient determination of cation exchange capacity (CEC) in soils. This method is composed of a single-step exchange reaction that adsorbs copper and is measured through spectrophotometry. The CEC of 16 Korean soils were measured using 1M ammonium acetate method (AAM) and the CASM. The CEC values determined by CASM and AAM were not significantly different, and were highly correlated ($r=0.966^{**}$). Due to the convenience, cost effectiveness, and time saving analysis of CASM, this method is recommended for most soil laboratories to measure CEC in Korean soils. However, CASM may not be applicable for soils that have a much higher CEC (greater than $20cmol_c\;kg^{-1}$).

Mycoplasma pneumoniae의 신속 동정과 분리균의 항생제 감수성 검사

장명웅(Myung-Woong Chang),김광혁(Kwang-Hyuk Kim),박인달(In-Dal Park),강경희(Kyung-Hee Kang),공은희(Eun-Hee Kong),정만홍(Man-Hong Jung),송갑영(Gap-Young Song),조성환(Sung-Hwan Jo),조동희(Dong-Whee Cho),한병호(Byung-Ho Han),김성원(Sung 대한미생물학회 2003 Journal of Bacteriology and Virology Vol.33 No.3

Cation Exchange Capacity in Korean Soils Determined by the Copper(II) Acetate Spectrophotometry Method

Won-Pyo Park,Kong-Man Chang,Bon-Jun Koo,Hae-Nam Hyun 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.6

Copper(II) acetate spectrophotometry method (CASM) was used for the rapid and convenient determination of cation exchange capacity (CEC) in soils. This method is composed of a single-step exchange reaction that adsorbs copper and is measured through spectrophotometry. The CEC of 16 Korean soils were measured using 1M ammonium acetate method (AAM) and the CASM. The CEC values determined by CASM and AAM were not significantly different, and were highly correlated (r = 0.966**). Due to the convenience, cost effectiveness, and time saving analysis of CASM, this method is recommended for most soil laboratories to measure CEC in Korean soils. However, CASM may not be applicable for soils that have a much higher CEC (greater than 20 cmolc kg<SUP>-1</SUP>).

Sorption and leaching characteristics of pesticides in volcanic ash soils of Jeju Island, Korea

Park Won-Pyo,Chang Kong-Man,Hyun Hae-Nam,Boo Kyung-Hwan,Koo Bon-Jun 한국응용생명화학회 2020 Applied Biological Chemistry (Appl Biol Chem) Vol.63 No.6

It is important to evaluate leaching behavior in agricultural soils to prevent the pollution of groundwater by pesticides. We identified the distribution coefficients (K d ) of ten pesticides with different physicochemical properties and compared their leaching characteristics using wick lysimeters from three distinct soil types on Jeju Island. The K d values varied by pesticide and soil, but were within the range of 1.2 to 4231 L kg −1 . Based on the European standard (K d < 10 L kg −1 ), six pesticides (alachlor, ethoprophos, carbofuran, napropamide, tebuconazole, and etridiazole) were mobile in at least one tested soil, and their soil organic carbon affinity was ≤ 5.811. This value differed greatly from the other pesticides (16.533 and higher). The solubility of the six mobile pesticides was ≥ 32 mg L −1 , which substantially differed from the other pesticides (≤ 0.71 mg L −1 ). Thus, we conclude that our mobility assessment, which is based on K d values, can be used to predict the leaching of pesticides in the volcanic ash soils of Jeju Island. The use of pesticides should be strictly controlled to reduce the possibility of groundwater contamination.

Nano-propping effect of residual silicas on reversible lithium storage over highly ordered mesoporous SnO₂ materials

Shon, Jeong Kuk,Kim, Hansu,Kong, Soo Sung,Hwang, Seong Hee,Han, Tae Hee,Kim, Ji Man,Pak, Chanho,Doo, Seokgwang,Chang, Hyuk Royal Society of Chemistry 2009 Journal of materials chemistry Vol.19 No.37

<P>Highly ordered mesoporous SnO<SUB>2</SUB> materials with residual silica species were successfully synthesized from a mesoporous silica template (SBA-15) <I>via</I> nano-replication and simple etching processes. A tin precursor, SnCl<SUB>2</SUB>·2H<SUB>2</SUB>O, was infiltrated spontaneously within the mesopores of the silica templates by melting the precursor at 353 K without using a solvent. After the heat-treatment of composite materials at 973 K under static air conditions, the controlled removal of silica templates using NaOH or HF solutions with different concentrations results in the successful preparation of mesoporous SnO<SUB>2</SUB> materials, where the amounts of residual silica species are in the range 0.9–17.4 wt%. The residual silica species induce a nano-propping effect enabling the mesoporous SnO<SUB>2</SUB> material (containing 6.0 wt% of silica species) to remain stable up to 973 K without any significant structural collapse. More importantly, the optimum amount of residual silica species (3.9–6.0 wt%) results in a dramatic reduction in capacity fading after prolonged charging–discharging cycles in Li-ion battery. The mesoporous SnO<SUB>2</SUB> material with 3.9 wt% of silica species still exhibits a large capacity (about 600 mAh g<SUP>−1</SUP>) after the 30<SUP>th</SUP> cycle, which is probably because the residual silica species act as a physical barrier to suppress the aggregation of Sn clusters formed in the mesoporous SnO<SUB>2</SUB> materials during the reversible lithium storage.</P> <P>Graphic Abstract</P><P>Mesoporous SnO<SUB>2</SUB>-SiO<SUB>2</SUB> composites were successfully obtained by nano-replication and controlled etching processes, exhibiting excellent thermal and electrochemical stability. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b905743a'> </P>

풍력발전용 100kW급 영구자석형 동기발전기에 관한 연구

김형길(Hyoung-Gil Kim),공정식(Jeong-Sik Kong),김정만(Jeong-Man Kim),김창우(Chang-Woo Kim),최장영(Jang-Young Choi) 대한전기학회 2016 대한전기학회 학술대회 논문집 Vol.2016 No.7

HPLC를 이용한 Kiwifruit의 계통별 비타민 C 함량 분석

송관정(Kwan Jeong Song),김미선(Misun Kim),허지만(Ji-Man Hur),정용환(Yong-Hwan Jung),장기창(Ki Chang Jang),송은영(Eun Young Song),김공호(Kong Ho Kim),김성철(Seong Cheol Kim) 한국원예학회 2003 한국원예학회 학술발표요지 Vol.2003 No.10

Unconventional pore and defect generation in molybdenum disulfide: application in high-rate lithium-ion batteries and the hydrogen evolution reaction.

Zhang, Kan,Kim, Hwan-Jin,Lee, Jeong-Taik,Chang, Gee-Woo,Shi, Xinjian,Kim, Wanjung,Ma, Ming,Kong, Ki-jeong,Choi, Jae-Man,Song, Min-Sang,Park, Jong Hyeok Wiley-VCH 2014 CHEM SUS CHEM Vol.7 No.9

<P>A 2H-MoS2 (H=hexagonal) ultrathin nanomesh with high defect generation and large porosity is demonstrated to improving electrochemical performance, including in lithium-ion batteries (LIBs) and the hydrogen evolution reaction (HER), with the aid of a 3D reduced graphene oxide (RGO) scaffold as fast electron and ion channels. The 3D defect-rich MoS2 nanomesh/RGO foam (Dr-MoS2 Nm/RGO) can be easily obtained through a one-pot cobalt acetate/graphene oxide (GO) co-assisted hydrothermal reaction, in which GO, cobalt and acetate ions are co-morphology-controlling agents and defect inducers. As an anode material for LIBs, Dr-MoS2 Nm/RGO has only a 9% capacity decay at a 10?C discharge rate versus 0.2?C with stable cyclability at the optimized composition (5?wt% RGO to MoS2 and 2?mol% Co to Mo), and significantly achieves 810?mA?h?g(-1) at a high current density of 9.46?A?g(-1) over at least 150?cycles. Moreover, Dr-MoS2 Nm/RGO exhibits superior activity for the HER with an overpotential as low as 80?mV and a Tafel slope of about 36?mV per decade. In contrast to the MoS2 nanosheet/RGO (MoS2 Ns/RGO), which is synthesized in the absence of cobalt ions, Dr-MoS2 Nm/RGO provides high interconnectivity for efficient lithium-ion transport, and rich defects as electrochemically active sites. DFT is used to prove the existence of rich defects due to anion replacement to become a Co-Mo-S atomic structure, releasing inert basal planes to active sites.</P>