Desiccation tolerance was a key trait that allowed plants to colonize land. However, little is known about the transition from desiccation tolerant non-vascular sensitive vascular ones. Filmy ferns (Hymenophyllaceae) represent useful system investigate how water-stress strategies differ between and stages within single organism because they have vascularized sporophytes nonvascular gametophytes...

Growth and pubertal development are important health markers. We used the data of a longitudinal growth study on a contemporary sample of US youth to examine the relationship between peak height velocity (PHV) and Tanner staging. We observed a substantial variability in the timing of PHV across Tanner stages, which is an important consideration for clinicians when assessing growth.

Recognizing the significance of the life stage of fish for nano-eco-toxicological studies, the acute toxicity of colloidal silver nanoparticles (AgNPs) was tested in three different life stages of rainbow trout. Fishes were exposed to colloidal AgNPs at nominal concentrations of 100, 32, 10, 3.2, 1, 0.32, 0.1, and 0.032 mg/L. The estimated 96 hr LC50 values were 0.25, 0.71, and 2.16 mg/L for th...

Recognizing the significance of the life stage of fish for nano-eco-toxicological studies, the acute toxicity of colloidal silver nanoparticles (AgNPs) was tested in three different life stages of rainbow trout. Fishes were exposed to colloidal AgNPs at nominal concentrations of 100, 32, 10, 3.2, 1, 0.32, 0.1, and 0.032 mg/L. The estimated 96 hr LC50 values were 0.25, 0.71, and 2.16 mg/L for th...

we describe, for the first time, the life history of the joker butterfly, byblia ilithyia drury and larval performance in terms of food consumption and utilization, and the length of life cycle on its host plant tragia plukenetii a. r. smith. our study was conducted throughout 2007 in the andhra university campus and the zoo park area, 5 km away from the campus, at visakhapatnam (17â° 42' ...

BACKGROUND This study was undertaken to compare the sleep profiles of healthy infants in swaddling and sleeping bag conditions. METHODS Polysomnographs of 85 healthy infants (40 in the study group, 45 in the control group) with a mean age of 7.5 weeks were recorded in the sleeping laboratory. A positive decision from the local Ethics Committee and the written consent of the parents were obtai...