introduction: anthropometry (morphometry of the human) is measurement of linear and angular dimensions of the human body. since the anthropometric parameters which are based on age, sex, geographical location and ethnic characteristics of the human species are different, therefore, anthropometric studies of population by age and sex should be done separately. methods: in this study, anthropomet...

aims: job rotation is considered as one of the human resource development methods. this study was carried out to investigate the correlation between job rotation and visiting number of environmental health employees. materials & methods: this descriptive cross-sectional study was done on environmental health employees in three health centers of north, north west and east of tehran in 2011. 42 p...

abstract: knee joint has major role in lower extremity activities. emong different elements of knee joint complex, anterior cruciate ligament has becom more interested because of its alignment, structural complication, varied never receptors and frequently susceptibility to injury. afterinjury of this ligament knee extensor torque decreases. the aim of this research was that reduce of quadricep...

A minute limpet-shaped shell, Qingjianglepas elegans n. gen. sp., is reported from the 518 million-year-old Qingjiang biota in Hubei, China. The new shell exhibits a typical limpet morphology with sculpture of strongly developed radial ribs, an anterior fold, and distinctive shape shift. Feature combinations such as are unique among Cambrian mollusk assemblages, but strikingly resemble that som...

The teeth of limpets exploit distinctive composite nanostructures consisting of high volume fractions of reinforcing goethite nanofibres within a softer protein phase to provide mechanical integrity when rasping over rock surfaces during feeding. The tensile strength of discrete volumes of limpet tooth material measured using in situ atomic force microscopy was found to range from 3.0 to 6.5 GP...

During the austral spring and summer months, the Antarctic limpet Nacella concinna colonizes intertidal environments in the Western Antarctica Peninsula region. The species is divided into a permanently sub-littoral and a seasonally intertidal, migratory subpopulation. We investigate the physiological differentiation between the two limpet groups to identify cellular and molecular changes that ...

abalone sperm appears simply to be concerned in the penetration part of the fertilization process. Summary.-A lytic agent having the property of dissolving the egg membrane has been extracted from sperm of the giant keyhole limpet (Megathura crenulata). The lysin is non-dialyzable and readily inactivated by heat. It precipitates upon saturation of the extract with ammonium sulphate. The precipi...