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RISS 인기검색어
- 검색키워드
- 저자 : Dimkpa, Christian (검색결과 3 건)
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Uchechukwu Dimkpa,Robert C. Godswill,Peter Okonudo,David Ikwuka 대한비만학회 2023 Journal of obesity & metabolic syndrome Vol.32 No.1
Background: There is a dearth of comparative studies on heart rate (HR) abnormalities at rest, chronotropic responses during submaximal exercise, and such responses during recovery from submaximal exercise between healthy-weight and overweight/obese young adults. Methods: Eighty healthy young adults (30 men and 50 women) aged 19 to 33 years participated in the present study. A symptom-limited, submaximal, cycle ergometer exercise test of intensity targeted at 60% to 70% of the subject’s age-predicted maximum HR was performed. The HR, blood pressure, and minute ventilation were measured at rest and during exercise. Post-exercise, HR was first measured at 1 minute of recovery and then every2 minutes until the 5th minute. Results: Our results showed significantly higher resting HR (P<0.001), lower percentage HR reserve during exercise (P<0.001), and slower HR recovery after exercise (P<0.05, P<0.01, or P<0.001) in overweight/obese men and women than in the non-overweight/obese controls. The prevalence of high resting HR, submaximal chronotropic incompetence, and blunted HR recovery were more common in the overweight/obese individuals than in the healthy-weight controls. Peak VO2 and ventilatory equivalent for oxygen were associated with resting HR, exercise HR parameters, and post-exercise HR recovery indices in both men and women. Conclusion: High resting HR, submaximal chronotropic incompetence, and blunted HR recovery in overweight/obese individuals in this study may be attributed to poor cardiorespiratory fitness and low respiratory efficiency.
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오상아,김영철,김지수,박주연,한송희,Christian Dimkpa,Anne J. Anderson 한국식물병리학회 2013 Plant Pathology Journal Vol.29 No.3
The stationary-phase sigma factor, RpoS, influences the expression of factors important in survival of Pseudomonas chlororaphis O6 in the rhizosphere. A partial proteomic profile of a rpoS mutant in P. chlororaphis O6was conducted to identify proteins under RpoS regulation. Five of 14 differentially regulated proteins had unknown roles. Changes in levels of proteins in P. chlororaphis O6 rpoS mutant were associated with iron metabolism, and protection against oxidative stress. The P. chlororaphis O6 rpoS mutant showed increased production of a pyoverdine-like siderophore, indole acetic acid, and altered isozyme patterns for peroxidase, catalase and superoxide dismutase. Consequently, sensitivity to hydrogen peroxide exposure increased in the P. chlororaphis O6 rpoS mutant, compared with the wild type. Taken together, RpoS exerted regulatory control over factors important for the habitat of P. chlororaphis O6in soil and on root surfaces. The properties of several of the proteins in the RpoS regulon are currently unknown.
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Oh, Sang A,Kim, Ji Soo,Park, Ju Yeon,Han, Song Hee,Dimkpa, Christian,Anderson, Anne J.,Kim, Young Cheol The Korean Society of Plant Pathology 2013 Plant Pathology Journal Vol.29 No.3
The stationary-phase sigma factor, RpoS, influences the expression of factors important in survival of Pseudomonas chlororaphis O6 in the rhizosphere. A partial proteomic profile of a rpoS mutant in P. chlororaphis O6 was conducted to identify proteins under RpoS regulation. Five of 14 differentially regulated proteins had unknown roles. Changes in levels of proteins in P. chlororaphis O6 rpoS mutant were associated with iron metabolism, and protection against oxidative stress. The P. chlororaphis O6 rpoS mutant showed increased production of a pyoverdine-like siderophore, indole acetic acid, and altered isozyme patterns for peroxidase, catalase and superoxide dismutase. Consequently, sensitivity to hydrogen peroxide exposure increased in the P. chlororaphis O6 rpoS mutant, compared with the wild type. Taken together, RpoS exerted regulatory control over factors important for the habitat of P. chlororaphis O6 in soil and on root surfaces. The properties of several of the proteins in the RpoS regulon are currently unknown.
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