| Txt Link | Title | Author(s) | Abstract | Publisher Link |
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Alterations of ionized Mg2+ in human blood after exercise. |
Mooren FC, Golf SW, Lechtermann A, Völker K. |
Magnesium (Mg) is the second most abundant intracellular cation with modulating properties in a number of metabolic processes, e.g. in glycolysis, and intracellular signalling processes, e.g. regulation of ion channels and transporters. There are conflicting data available about the regulation of Mg in blood cells during exercise. Moreover, there are no data available about changes of the metabolic important fraction of ionized Mg(2+) both in blood and in blood cells during exercise. The present study investigated the changes of ionized Mg(2+) and total Mg concentration in different compartments after a stepwise treadmill ergometer test. Intracellular ionized Mg(2+) of thrombocytes and erythrocytes was determined by the magnesium sensitive fluorescent dyes mag-fura-2 and Mag-Green using fluorescence spectroscopy and flow cytometry, respectively. Ionized Mg(2+) in blood/serum was measured by an ion-sensitive microelectrode. Total cellular and serum Mg concentration were investigated using atomic absorbance spectroscopy and photometry, respectively. The present results shown that at the end of the ergometer test, ionized Mg(2+) in both blood and serum and total serum Mg decreased. In |
15993138 |
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Carcinogenic and genotoxic potential of turf pesticides commonly used on golf courses. |
Knopper L, Lean DR. |
As a result of the controversy surrounding pesticide use and animal and human health concerns, many municipalities in Canada have restricted, or are in the midst of restricting, the use of pesticides for cosmetic purposes. In some cases, pesticide use on golf courses is also being phased out at the municipal level. One of the dominant health effects of concern in relation to pesticide exposure is the occurrence of cancer. With over 1600 golf courses in Canada and between 400 and 600 new courses created each year in Canada and the United States, there appears to be increasing potential for unintentional human and animal exposure to turf pesticides. In light of the debate around pesticide exposure and the onset of cancer that has lead to controversial Canadian municipal bylaws regulating pesticide use, and due to recent results of a biomonitoring study that has shown genotoxicity in a rodent species living in golf-courses, it seems timely to review the carcinogenic and genotoxic potential of commonly used golf-course pesticides. The purpose of this review is to present some debated epidemiological research that deals with the relationship between pesticide exposure and cancer, and to |
15205044 |
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Chlorothalonil and 2,4-D losses in surface water discharge from a managed turf watershed. |
King KW, Balogh JC. |
Managed turf sites (golf courses) are the most intensively managed landscapes in the urban environment. Yet, long-term watershed scale studies documenting the environmental transport of agrichemicals applied to these systems are rare. The objective of this study was to quantify the surface discharge losses of two commonly applied pesticides (chlorothalonil and 2,4-D) resulting from prevailing practices on a managed golf course. Inflow and outflow discharge waters on a subarea of Northland Country Club located in Duluth, MN were measured for both quantity and quality from April through November from 2003 to 2008. The median chlorothalonil outflow concentration (0.58 microg L(-1)) was significantly greater (p < 0.05) than the inflow concentration, which was below the detection limit (0.07 microg L(-1)). Similarly, the median outflow 2,4-D concentration (0.85 microg L(-1)) was significantly greater (p < 0.05) than the inflow concentration (0.31 microg L(-1)). Chlorothalonil concentrations occasionally exceeded acute toxicity levels (7.6 microg L(-1)) reported for rainbow trout. No 2,4-D concentrations exceeded any human or aquatic species published toxicity level; however, the maximum |
20526481 |
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Computer simulation of human motion in sports biomechanics. |
Vaughan CL. |
This chapter has covered some important aspects of the computer simulation of human motion in sports biomechanics. First the definition and the advantages and limitations of computer simulation were discussed; second, research on various sporting activities were reviewed. These activities included basic movements, aquatic sports, track and field athletics, winter sports, gymnastics, and striking sports. This list was not exhaustive and certain material has, of necessity, been omitted. However, it was felt that a sufficiently broad and interesting range of activities was chosen to illustrate both the advantages and the pitfalls of simulation. It is almost a decade since Miller [53] wrote a review chapter similar to this one. One might be tempted to say that things have changed radically since then--that computer simulation is now a widely accepted and readily applied research tool in sports biomechanics. This is simply not true, however. Biomechanics researchers still tend to emphasize the descriptive type of study, often unfortunately, when a little theoretical explanation would have been more helpful [29]. What will the next decade bring? Of one thing we can be certain: The power |
6376138 |
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Cryptosporidiosis: a brief literature review and update regarding Cryptosporidium in feces of Canada geese (Branta canadensis). |
Kassa H, Harrington BJ, Bisesi MS. |
Canada geese are increasingly abundant in Ohio, with large nesting populations throughout the state, and goose feces contaminate grassy areas and pavements in many public, commercial, and residential sites. In 1999 the authors found a high prevalence of Giardia, Campylobacter, and especially Cryptosporidium in collected feces of Canada geese. The purpose of this follow-up study was to survey known Canada geese sites in three counties in Ohio (Lucas, Ottawa, and Wood) and to determine the prevalence of sites testing positive for Cryptosporidium. The sites included golf courses, cemeteries, public parks, and health care and teaching facilities. At each of 11 sites, 12 goose feces of wet and loose appearance were collected and manually compressed into one composite sample representing that site. The samples were tested for Cryptosporidium with a sensitive monoclonal enzyme immunoassay (EIA) method. In 2000 and 2001, nine of 11 sites (81.8 percent) and nine of 10 sites (90 percent), respectively, were positive for Cryptosporidium. The species or genotypes of Cryptosporidium found in the geese feces and their potential to infect humans is unknown. A survey of the literature indicates, h |
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Education and racial-ethnic differences in types of exercise in the United States. |
Saint Onge JM, Krueger PM. |
Epidemiological research typically focuses on the intensity, frequency, or duration of physical activity, without consideration of the socially meaningful dimensions of exercise. The authors use data from the 1998 National Health Interview Survey (N = 17,455) and information on participation in 15 exercise behaviors to examine educational differences in exercise among non-Hispanic whites, non-Hispanic blacks, and Mexican Americans. Factor analysis identifies three types of exercise: team sports (e.g., basketball, football), fitness activities (e.g., running, weight lifting), and activities that require the use of specialized facilities (e.g., golf, tennis). Cultural capital and human capital perspectives offer insight into different dimensions of the relationship between education and exercise. Whites disproportionately undertake facility-based exercise, blacks tend toward team and fitness activities, and Mexican Americans gravitate toward team sports. Our findings offer insight into the social stratification of health and can aid the design of public health interventions. |
21673147 |
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Effect of magnesium on granulocyte function and on the exercise induced inflammatory response. |
Mooren FC, Golf SW, Völker K. |
Magnesium status is a well-known modulator of the immune system. In the present study we investigated the effect of magnesium on granulocyte signalling and function. Furthermore, we performed a double-blinded randomised study investigating the effect of a two-month magnesium supplementation period on the exercise-associated alterations in immune function. In vitro incubation of granulocytes in media of different magnesium composition resulted in significant changes in chemotactic peptide-induced calcium transients while basal calcium levels were not affected. Likewise, the stimulus-induced formation of free radicals was affected by extracellular magnesium while phagocytosis of granulocytes was not affected. In the second part of the study we investigated whether a two-month period of magnesium supplementation was able to diminish alterations in immune cell counts and functions after an exercise test until exhaustion. The magnesium status was similar in both human and placebo groups and did not change significantly after the supplementation period. Exhaustive exercise induced an activation of the immune system as indicated by an increase in granulocyte count and a post-exercise lymp |
12735483 |
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Effects of exercise practice on the maintenance of radius bone mineral density in postmenopausal women. |
Nagata M, Kitagawa J, Miyake T, Nakahara Y. |
The effect of exercise practice on the radius bone mineral density (BMD) was investigated on 480 women at the age of perimenopause and later. The BMD at the 1/3 distal site of the radius on a non-dominant hand was measured using the Dual Energy X-ray Absorptiometry method. The subjects were divided into group E with regular exercising and group C without regular exercising. The difference of mean radius BMD values was not statistically significant between groups E and C. Each of the groups E and C was further classified into a perimenopause group and groups with stratified postmenopausal years (postmenopausal years less than 5, less than 10 and more than 10). Then, the mean radius BMD value of the perimenopause subgroup was taken as 100% for each of the groups E and C, and the relative radius BMD values of subgroups were compared between groups E and C. The relative BMD values for the subgroup of postmenopausal years more than 10 were higher in E group than those in C group, while no difference was observed in below postmenopausal 10 years between the two groups. To clarify the BMD difference among exercise events, group E was further divided into the following three subgroups: the |
12491819 |
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Evaluation of a game controller using human stiffness estimated from electromyogram. |
Watanabe M, Yamamoto T, Kambara H, Koike Y. |
A motion controller which has an acceleration sensor increases reality and intuitiveness in sports games. But we adjust not only visible posture but also invisible force like stiffness and viscosity when we play sports. We propose a game controller using player's movement and force by using acceleration and electromyogram(EMG). In this research, we compared conventional motion controller and proposed method by using a golf game. The score was the distance between cup position and carried ball position. For beginner of video games, proposed method is superior than conventional. For well-trained video game players conventional button type controller wins on accurate input. Because it was difficult to keep arm stiffness constant than button. Using coarsely-quantized EMG might resolve this problem, then achieve intuitive and easy-to-use game controller. |
21096233 |
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Fertilizer source effects on phosphate and nitrate leaching through simulated golf greens. |
Shuman LM. |
Phosphorus and nitrogen leached from high-porosity golf greens can adversely affect surface water and groundwater quality. Greenhouse and field lysimeter experiments were carried out to determine the effects of eight fertilizer sources on P and N leaching from simulated golf greens. Phosphorus appeared in the leachate later than nitrate-N, and the highest concentrations were for the soluble 20-20-20 and the 16-25-12 starter fertilizers. The other six sources resulted in lower P concentrations. The soluble 20-20-20 and the 16-25-12 sources each resulted in 43% of the added P eluting in the leachate, whereas the others varied from 15 to 25%. For nitrate-N the lowest cumulative mass was for the controlled-release 13-13-13 and sulfur-coated urea. A higher percentage of applied P than applied N leached from both field and greenhouse lysimeters. However, the amounts of P leached for the field lysimeters were lower than for the greenhouse columns. |
12826419 |
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Human hair shape is programmed from the bulb. |
Thibaut S, Gaillard O, Bouhanna P, Cannell DW, Bernard BA. |
No abstract available |
Not Available |
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Human perceptions of sports equipment under playing conditions. |
Roberts J, Jones R, Harwood C, Mitchell S, Rothberg S. |
No abstract available |
Not Available |
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Increased beta-adrenoceptor-coupled adenylate cyclase response in transplanted human hearts. |
Bjørnerheim R, Simonsen S, Golf S. |
No abstract available |
Not Available |
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Neuromotor issues in human performance: introduction. |
Kamen G. |
No abstract available |
Not Available |
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Phosphorus and nitrate nitrogen in runoff following fertilizer application to turfgrass. |
Shuman LM. |
No abstract available |
Not Available |
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Predicting runoff and associated nitrogen losses from turfgrass using the Root Zone Water Quality Model (RZWQM). |
Schwartz L, Shuman LM. |
No abstract available |
Not Available |
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Relative potencies of various beta-adrenoceptor antagonists (BAA) at the level of the human myocardial beta-adrenoceptor-adenylate cyclase (AC) complex. Is intrinsic sympathomimetic activity (ISA) due to AC activation? |
Golf S, Hansson V. |
No abstract available |
Not Available |
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Relative selectivity of different beta-adrenoceptor antagonists for human heart beta 1- and beta 2-receptor subtypes assayed by a radioligand binding technique. |
Golf S, Bjørnerheim R, Erichsen A, Hansson V. |
No abstract available |
Not Available |
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Specific non-beta-adrenergic binding sites for 125I-iodocyanopindolol in myocardial membrane preparations: a comparative study between human, rat, and porcine hearts. |
Bjørnerheim R, Golf S, Hansson V. |
No abstract available |
Not Available |
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Sports activity after anatomical total shoulder arthroplasty. |
Schumann K, Flury MP, Schwyzer HK, Simmen BR, Drerup S, Goldhahn J. |
No abstract available |
Not Available |
