Communities containing species that are not niche differentiated require somemechanism to avoid the expected competitive exclusion of all but one or a few species. Predator pressure has long been held to be one of thosemechanisms. Here, we show that the critical feature of predation is not its intensity, but its degree of specialization. Neither highly specialist nor highly generalist predators...

The authors examined racial and gender differences on sport-related sources of acute stress that competitive athletes perceived as highly intense and experienced during the competitive event. Athletes (N = 332, 176 men, 156 women; 59 African Americans: 27 men, 32 women; 232 Caucasians: 125 men, 107 women; and 41 Hispanics: 24 men, 17 women) who competed in sport on a high school or college team...

Purpose It is well established in marketing literature that international performance positively affected by capabilities, whether static or dynamic. However, recent theoretical development proposed adaptive capabilities (AMC) as a set of able to close the gap. Given relative newness this construct, empirical studies are still scarce. Therefore, drawing from resource-based view perspective, stu...

Incremental tests on a treadmill are used to evaluate endurance athletes; however, no criterion exists to determine the intensity at which to start the test, potentially causing the loss of the first lactate threshold. This study aimed to determine the ideal speed for runners to start incremental treadmill tests. The study consisted of 94 runners who self-reported the average speed from their l...

mechanisms that prevent competitive exclusion either by the increased mortality of the competitive superiors [IDH] or by the permanent rearrangement of the competitive dominance hierarchy [GCC]. Very strong disturbances and extreme environmental changes result in communities of low diversity. Low-level (infrequent,low intensity or small spatial scale) occurrences of these mechanisms cannot prev...

This research explores the extent to which Internet technology firms’ competitive actions shape the diffusion of their respective products in competition with rivals. Combining competitive dynamics perspective with technology diffusion, we extend macro innovation diffusion model by incorporating four micro-level firm actions, including firms’ competitive intensity, action timing, action simplic...

Trypsin (E.C.3.4.21.4) is a serine protease commonly used in proteomics for digestion of proteins. In the present study, the effect of nano-TiO2 on the conformation and catalytic activity of trypsin were studied. The thermal denaturation of trypsin has been investigated in the presence and absence of nano-TiO2 over the temperature range (293-373 K) at pH 3.0 and 7.25, using temperature scanning...

This study examined how altering training intensity during a taper impacts maximal mechanical power (Pmax), torque at power maximum (T), velocity at power maximum (V), and swim performance (m . sec (-1)). Using an arm ergometer with inertial loading, measurements of Pmax, T, and V were made for 7 consecutive weeks prior to the taper and during the taper in 7 female competitive collegiate swimme...