منابع مشابه
Spatial Vision in Bombus terrestris
Bombus terrestris is one of the most commonly used insect models to investigate visually guided behavior and spatial vision in particular. Two fundamental measures of spatial vision are spatial resolution and contrast sensitivity. In this study, we report the threshold of spatial resolution in B. terrestris and characterize the contrast sensitivity function of the bumblebee visual system for a ...
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Housing is both a key indicator of, and contributor to, social advantage/disadvantage. Opportunities for wealth creation, affordability, sense of security and belonging to community and place, level of choice, self-esteem and self-determination are all linked to housing and, more specifi cally, to tenure type with its resulting (and often hidden) inequity. Issues relating to affordability and a...
متن کاملCytodifferentiation during Spermiogenesis in Lumbricus Terrestris
The structural changes during spermiogenesis were studied on developing spermatids in seminal vesicles and receptacles of Lumbricus terrestris fixed in glutaraldehyde-osmium tetroxide and embedded in Epon-Araldite. The centriole plays a prominent role in the morphogenesis and organization of the microtubules of the manchette and flagellum. Microtubules arising from the centriole extend anterior...
متن کاملThe Reflexology of Sole on Tiredness Intensity in Pregnant Women
Background: Tiredness is one of the most common complaints among pregnant women, but little attention has been paid to its importance and a way to control it. Reflexology can be employed as a nursing intervention to reduce it. The purpose of this study was to determine the effect of reflexology on the tiredness intensity in pregnant women.Methods: This study was carried out on 74 pregnant women...
متن کاملNil nove sub sole ?
Pricing schemes for Internet services have turned out to be of crucial influence for the competitiveness of Internet Service Providers (ISP). Despite of this urgent demand, there is still no standard tariff scheme that solves the so-called “feasibility problem”, i.e. ensures simultaneously technical feasibility, economic efficiency and user acceptance. This paper investigates the reason for the...
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ژورنال
عنوان ژورنال: Nature
سال: 1904
ISSN: 0028-0836,1476-4687
DOI: 10.1038/070338a0