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Search Results: 1 - 10 of 149614 matches for " Osmo H?nninen "
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EFFECT OF EXERCISE ON LEARNING, MEMORY AND LEVELS OF EPINEPHRINE IN RATS' HIPPOCAMPUS
Nasser Ahmadiasl,Hojjatallah Alaei,Osmo Hnninen
Journal of Sports Science and Medicine , 2003,
Abstract: The aim of the present study was to investigate effect of exercise on learning and memory, long-term potentiation and levels of epinephrine in the rat hippocampus. Treadmill trained (one hour at 17 m·min-1 for 10 days) and corresponding control rats went through spatial learning process on a Morris water maze for 8 days. The time to reach the platform (latency), the length of swim path, and the swim speed were used for the evaluation of spatial learning. Our results showed that physical activity produced a significant enhancement in spatial learning, with a decreased path length (p<0.05) and latency (p<0.05) to the platform in Morris water maze, without affecting the swim speed. Furthermore, the levels of the epinephrine were significantly increased (p<0.05) in hippocampus of the exercised rats. In conclusion our findings suggest that the enhanced learning by exercise may be mediated through the activation of adrenoceptors in the hippocampus and epinephrine may play an important role in potentiation of learning
Physical activity during leisure and commuting in Tianjin, China
Gang Hu,Pekkarinen Heikki,Hnninen Osmo,Yu Zhijie
Bulletin of the World Health Organization , 2002,
Abstract: OBJECTIVE: To investigate physical activity during leisure time and commuting among persons aged 15-69 years in the urban population of Tianjin, China, and to assess its associations with demographic and health-related characteristics. METHODS: In 1996 a cross-sectional survey of 2002 males and 1974 females provided information on physical activity during leisure time and commuting and on demographics and health behaviours. FINDINGS: No leisure-time physical activity was engaged in by 67% of females and 61% of males. However, only 4% of females and 9% of males reported an absence of physical activity during commuting. The mean duration of leisure-time physical activity for the whole population was about 10 min per day. The average commuting time on foot or by bicycle was about 30 min. Leisure-time physical activity was more frequent among highly educated people, people with high incomes, white-collar workers, married people, non-smokers, or people commuting on foot or by bicycle than among other people. Persons with low incomes, male blue-collar workers and married people were more likely than others to engage in 30 min or more per day of physical activity on foot or by bicycle when commuting. CONCLUSION: People in Tianjin engaged in a high level of physical activity when commuting and a low level of leisure-time physical activity.
Electromagnetic irradiation exposure and its bioindication--an overview
Electromagnetic irradiation exposure and its bioindication – An overview

H nninen Osmo,Huttunen Paavo,Ekman Reijo,
Osmo H¨anninen
,Paavo Huttunen,Reijo Ekman

环境科学学报(英文版) , 2011,
Abstract: Man made electromagnetic irradiation and fields cover now the globe due to the recent extensive propagation of mobile telephony. The increased load affects animals and also plants. Especially birds have been studied. Humans are also sensitive. They are good bioindicators as epidemiological methods are available. Humans can also report symptoms which cannot be directly measured with presently available technologies. The nonionizing irradiation can as the ionizing one break the DNA, damage proteins, even increase the blood brain barrier permeability, disturb the night rest, cause fatigue and hormonal disturbances. An increase of the tumours of human head has been described in correlation with the long term mobile phone use and on that side more exposed. The regulations covering mobile telephony are already about two decades old and need re-evaluation. The multitude of irradiation and the interaction of the different wavelength exposures, i.e., frequency sensitivity is poorly known at present. We should not forget the comparative studies of different species especially those which rely in their lives on electromagnetic orientation physiology. Some countries have issued warnings on the exposures of children. The producers of mobile technology have recently warned the users not to keep those devices in active stage in skin contact.
Physical activity during leisure and commuting in Tianjin, China
Gang,Hu; Pekkarinen,Heikki; Hnninen,Osmo; Yu,Zhijie; Huiguang,Tian; Zeyu,Guo; Nissinen,Aulikki;
Bulletin of the World Health Organization , 2002, DOI: 10.1590/S0042-96862002001200006
Abstract: objective: to investigate physical activity during leisure time and commuting among persons aged 15-69 years in the urban population of tianjin, china, and to assess its associations with demographic and health-related characteristics. methods: in 1996 a cross-sectional survey of 2002 males and 1974 females provided information on physical activity during leisure time and commuting and on demographics and health behaviours. findings: no leisure-time physical activity was engaged in by 67% of females and 61% of males. however, only 4% of females and 9% of males reported an absence of physical activity during commuting. the mean duration of leisure-time physical activity for the whole population was about 10 min per day. the average commuting time on foot or by bicycle was about 30 min. leisure-time physical activity was more frequent among highly educated people, people with high incomes, white-collar workers, married people, non-smokers, or people commuting on foot or by bicycle than among other people. persons with low incomes, male blue-collar workers and married people were more likely than others to engage in 30 min or more per day of physical activity on foot or by bicycle when commuting. conclusion: people in tianjin engaged in a high level of physical activity when commuting and a low level of leisure-time physical activity.
Effect of Aerobic Fitness on the Physiological Stress Responses at Work
Tiina Ritvanen, Veikko Louhevaara, Pertti Helin, Toivo Halonen, Osmo H nninen
International Journal of Occupational Medicine and Environmental Health , 2007, DOI: 10.2478/v10001-007-0005-5
Abstract: Objectives: The aim of the present study was to examine the effects of aerobic fitness on physiological stress responses experienced by teachers during working hours. Materials and Methods: Twenty six healthy female and male teachers aged 33-62 years, participated in the study. The ratings of perceived stress visual analogue scale (VAS), and the measurement of physiological responses (norepinephrine, epinephrine, cortisol, diastolic and systolic blood pressure, heart rate (HR) and trapezius muscle activity by electromyography (EMG) were determined. Predicted maximal oxygen uptake (VO2max) was measured using the submaximal bicycle ergometer test. The predicted VO2max was standardized for age using residuals of linear regression analyses. Results: Static EMG activity, HR and VAS were associated with aerobic fitness in teachers. Conclusions: The results suggest that a higher level of aerobic fitness may reduce muscle tension, HR and perceived work stress in teachers.
Exercise training with dietary counselling increases mitochondrial chaperone expression in middle-aged subjects with impaired glucose tolerance
Mika Venoj?rvi, Sirkka Aunola, Raivo Puhke, Jukka Marniemi, Helena H?m?l?inen, Jukka-Pekka Halonen, Jaana Lindstr?m, Merja Rastas, Kirsti H?llsten, Pirjo Nuutila, Osmo Hnninen, Mustafa Atalay
BMC Endocrine Disorders , 2008, DOI: 10.1186/1472-6823-8-3
Abstract: Exercise training, combined with dietary counselling, increased the expression of mitochondrial chaperones HSP60 and glucose-regulated protein 75 (GRP75) in the vastus lateralis muscle in the IGTslow group and that of HSP60 in the IGTfast group. In cytoplasmic chaperones HSP72 or HSP90 no changes took place. In the IGTslow group, a significant positive correlation between the increased muscle content of HSP60 and the oxygen radical absorbing capacity values and, in the IGTfast group, between the improved VO2max value and the increased protein expression of GRP75 were found. Serum uric acid concentrations decreased in both sub-groups and serum protein carbonyl concentrations decreased in the IGTfast group.The 2-year intervention up-regulated mitochondrial HSP expressions in middle-aged subjects with impaired glucose tolerance. These improvements, however, were not correlated directly with enhanced glucose tolerance.Diabetes and its complications are increasing as major causes of mortality and morbidity in the developed countries [1]. Insulin resistance and diabetes are associated with increased oxidative stresmpaired cellular defence systems [2-4]. We have recently shown in rats that streptozotocin-induced diabetes (SID) increase oxidative stress and resulted in impaired heat shock protein (HSP) responses in liver and skeletal muscle tissue [2]. HSPs are a family of proteins that promote cell survival after a wide variety of environmental stresses. The most widely studied HSP family is the 70-kDA family, which contains the constitutive HSP73 and inducible HSP72 forms. HSP72 plays a central role in protein synthesis, translocation, folding and assembly/disassembly of multimetric protein complexes as molecular chaperones [5]. In type 2 diabetic subjects, insulin resistance correlates with decreased expression of HSP72 in skeletal muscle [6]. HSP60 and glucose-regulated protein 75 (GRP75) are located in the mitochondria, where they are involved in the trafficking and pr
Localization of Plastic Deformation in Copper Canisters for Spent Nuclear Fuel  [PDF]
Kati Savolainen, Tapio Saukkonen, Hannu Hnninen
World Journal of Nuclear Science and Technology (WJNST) , 2012, DOI: 10.4236/wjnst.2012.21003
Abstract: Localization of plastic deformation in different parts (extruded and forged base materials as well as EB and FSW welds) of the corrosion barrier copper canister for final disposal of spent nuclear fuel was studied using tensile testing, optical strain measurement, scanning electron microscopy (SEM), and electron back-scatter diffraction (EBSD). Results show that in the base materials plastic deformation occurs very uniformly. In FSW welds the deformation localizes in the weld either at the processing line or at a line of entrapped oxide particles. In EB welds the deformation localizes to the equally oriented large grains at the weld centreline or at the steep grain size gradient in the fusion line.
Effect of Climate Change on Transformers Loading Conditions in the Future Smart Grid Environment  [PDF]
Murtaza Hashmi, Matti Lehtonen, Seppo Hnninen
Open Journal of Applied Sciences (OJAppS) , 2013, DOI: 10.4236/ojapps.2013.32B005
Abstract: The steady-state calculations are performed using IEC guidelines to determine the hot spot temperatures of distribution and power transformers in the worst projected Finnish environment due to long summer periods. Moreover, the effect of increase in winding resistance due to increase in ambient temperatures has been taken into account. The primary objective of the research is to investigate the possible extreme circumstances due to climate change. It is concluded that the power and distribution transformers should be progressively de-rated under such circumstances for their safe operations, which will not only prove cost-effective for utilities but also improve the reliability of the power supply to their valued customers in the challenging future smart grid environment.
Virtual study trip to community mental health services in Finland
Esko Hnninen
International Journal of Integrated Care , 2010,
Abstract:
Finnish challenges and solutions on community mental health services
Esko Hnninen
International Journal of Integrated Care , 2010,
Abstract:
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