The aim of the present study was to examine how team composition players with different roles constrains individual and collective tactical behaviours, ball possession effectiveness, during competitive 3 vs small-sided conditioned games (SSCGs) in youth soccer players. Fifteen male (under 15 yrs, mean age 13.2 ± 1.03 years, years practice: 4.2 1.10 years) from same club participated this study....

Schistosoma haematobium-infected patients are more likely to develop bladder cancer and be more exposed to carcinogenic N-nitroso compounds than uninfected patients. As N7-methylguanine is a marker of exposure to methylating agents of this type, we have measured N7-methyldeoxyguanosine 3'-monophosphate (N7-MedGp) by (32)P postlabeling. DNA was isolated from 42 paired normal and tumor tissue of ...

Monitoring exposure to alkylating agents may be achieved by quantitatively determining the adduct levels formed with nucleic acids and/or proteins. One of the most significant results arising from the application of this approach has been the discovery in control populations of "background" levels of alkylated nucleic acid bases or alkylated proteins, in particular hemoglobin (Hb). In the case ...

BACKGROUND Osteoporosis mainly affects menopausal women and the elderly, predisposing these individuals to fractures that result in morbidity, mortality and costs to the healthcare system. Since dermal collagen reduces in parallel with a decrease in bone mass with aging, skin thickness may be indicative of a risk of osteoporosis. OBJECTIVES To evaluate the correlation between bone density and...

Bisimplicial edges in bipartite graphs are closely related to pivots in Gaussian elimination that avoid turning zeroes into non-zeroes. We present a new deterministic algorithm to find such edges in bipartite graphs. The expected time complexity of our new algorithm is O ( n2 log n ) on random bipartite graphs in which each edge is present with a fixed probability p, a polynomial improvement ov...

While a relative age effect (RAE) has been reported in handball, such analyses do not consider actual playing time during competitions, which may actually have more impact on performance in matches. The objective of the present study was to examine the RAE on playing time during international competitions with respect to playing positions. Team compositions (477 players) of the quarter finalist...

A new nontrivial U(1) gauge extension of the Minimal Supersymmetric Standard Model (MSSM) is proposed which automatically conserves baryon number and lepton number, and solves the μ problem. Naturally small Dirac neutrino masses are also possible in this context. • Talk at TH-2002, Paris, July 2002. If the minimal standard model of quarks and leptons (SM) is extended to include supersymmetry, 3...

CONTEXT Thermal responses of average-sized male subjects (mass of approximately 70 kg) may not accurately reflect the rate of heat storage in larger athletes with greater muscle mass. OBJECTIVE To determine if core temperature (T(c)) is different in National Football League linemen and backs and if T(c) is related to percentage of dehydration or sweat rate. DESIGN We measured T(c) and sweat...