objective: to assess the effect of combination of pulsed electromagnetic fields (pemf) with predatory stress on transected sciatic nerve regeneration in rats.  methods: in sham- operated group (sog) the nerve was manipulated and left intact. the 10-mm rat sciatic nerve gap was created in rats. in transected group (transected) nerve stumps were sutured to adjacent muscle and in vein graft group ...

Although the predatory stress experimental protocol is considered more psychological than the restraint protocol, it has rarely been used to study the effect of psychological stress on reproduction. Few studies exist on the direct effect of psychological stress to a female on developmental competence of her oocytes, and the direct effect of predatory maternal stress on oocytes has not been repo...

Humans with post-traumatic stress disorder (PTSD) are deficient at extinguishing conditioned fear responses. A study of identical twins concluded that this extinction deficit does not predate trauma but develops as a result of trauma. The present study tested whether the Lewis rat model of PTSD reproduces these features of the human syndrome. Lewis rats were subjected to classical auditory fear...

social stressors typically elicit two distinct behavioural responses in vertebrates: an active response (i.e., "fight or flight") or behavioural inhibition (i.e., freezing). Here, we report an interesting exception to this dichotomy in a Caribbean cleaner fish, which interacts with a wide variety of reef fish clients, including predatory species. Cleaning gobies appraise predatory clients as po...

This letter addresses the current scenario ofpredatory publishers in the medical fieldand strategies to curb young researchers frompredatory publishing. Today, the increasingtrend and magnitude of predatory publishershave proposed a big challenge to youngresearchers in the medical field (1). Predatorypublishers are publishers which publish paperswith questionable peer review, charge enormouspub...

Arthrodires were predatory vertebrates of the Devonian seas, with simple lower jaws conducible to examination of feeding across growth, evolution, and local diversity. 2D finite element analyses (FEA) of arthrodire mandibles (scaled to equivalent length and force, and checked against a 3D control), and a new method of stress integration, enable extensive comparisons of bite stress. FEA indicate...

The decline in amphibians across the globe has sparked a search for the causes, and recent evidence suggests a connection with pesticides. However, for most pesticides, tests on amphibians are rare and conducted only for short durations (1 to 4 days) and without natural stressors. Recent studies have discovered that the stress of predator cues in the water can make insecticides much more lethal...

The 1960s represent an important chapter in U.S. business history, partly because they ushered in a new tactic of corporate combination-the predatory takeover Predatory takeovers not only facilitate the restructuring of corporate enterprises, they also alter the internal structure of the business elite. We explore the factors that led large corporations to be acquired through friendly and preda...

Global declines in amphibians likely have multiple causes, including widespread pesticide use. Our knowledge of pesticide effects on amphibians is largely limited to short-term (4-d) toxicity tests conducted under highly artificial conditions to determine lethal concentrations (LC50). We found that if we used slightly longer exposure times (10-16 d), low concentrations of the pesticide carbaryl...