objectives: the purpose of this study was to evaluate the resistance to fatigue failure of five different nickel-titanium rotary files in three different curved trajectories. materials and methods: a total of 150 neoniti a1, race 25.06, mtwo 25.06, twisted file 25.06 and protaper next x2 files with the tip size of 25 were tested (n=30 for each group). three groove types simulating curved canals...

This paper considers residential segregation by race and by type of household in 1970 and 1980. The paper presents entropy indices of segregation for the San Francisco Bay Area and its five metropolitan areas . The methodology permits an investigation of the effects of group definition upon segregation measures, and an analysis of the degree of independence in the segregation of households by r...

Past research has demonstrated the negative impact of race-based rejection sensitivity (RS-race) on institutional belonging and satisfaction among minority-group students in predominantly White universities. Given research documenting the benefits of cross-group friendship for intergroup attitudes, we tested whether friendships with majority-group peers would attenuate the effects of RS-race wi...

Several theories suggest that people do not represent race when it does not signify group boundaries. However, race is often associated with visually salient differences in skin tone and facial features. In this study, we investigated whether race could be decoded from distributed patterns of neural activity in the fusiform gyri and early visual cortex when visual features that often covary wit...

BACKGROUND Riboflavin is known to protect tissue from oxidative damage but, to our knowledge, has not been explored as a means to control exercise-related muscle soreness. This study investigated whether acute ingestion of riboflavin reduces muscle pain and soreness during and after completion of a 161-km ultramarathon and improves functional recovery after the event. METHODS In this double-b...

We assessed whether a protein supplementation protocol could attenuate running-induced muscle soreness and other damage markers compared to iso-caloric placebo supplementation. A double-blind randomized controlled trial was performed among 323 recreational runners (age 44 ± 11 years, 56% men) participating in 15-km road race. Participants received milk or carbohydrate supplementation, for three...

We assessed the incidence and etiology of hyponatremia in the 100-mile (161 km) Iditasport ultramarathon. Subjects (8 cyclists, 8 runners) were weighed and serum sodium was measured pre- and post-race. Race diets were analyzed to determine fluid and sodium consumption. Subjects were split by post-race serum sodium concentration into hyponatremic and normonatremic groups for statistical analyses...

ABSTRACT Genetic analysis for resistance to bacterial blight (Xanthomonas oryzae pv. oryzae) of 21 rice (Oryza sativa L.) cultivars was carried out. These cultivars were divided into two groups based on their reactions to Philippine races of bacterial blight. Cultivars of group 1 were resistant to race 1 and those of group 2 were susceptible to race 1 but resistant to race 2. All the cultivars ...

oral supplementation with potassium bromide (10, 20 and 40 ?g/ml) to fifth instar larvae of csr2, csr4 and csr2xcsr4 crossbreed races of the silkworm, bombyx mori resulted in a significant increase in the fat body glycogen in all the treated groups and in all the three races of the silkworm, b. mori. the fat body protein content was increased with 20 and 40 ?g/ml treated groups in csr2 and csr4...