background: ticks are obligate blood feeders that parasitize a wide variety of animals. hyalomma aegyptium, parasitize tortoises and other small wild life and livestock. this study was carried out to determine spur-thighed tortoise (testudo graeca) infestation to h. ageyptium in urmia region west azerbaijan of iran. methods: the study was carried out over a 16 month period from the spring of 20...

The role of petal spurs and specialized pollinator interactions has been studied since Darwin. Aquilegia petal spurs exhibit striking size and shape diversity, correlated with specialized pollinators ranging from bees to hawkmoths in a textbook example of adaptive radiation. Despite the evolutionary significance of spur length, remarkably little is known about Aquilegia spur morphogenesis and i...

We present 21-cm H i line and 408 MHz and 1.4 GHz continuum observations of the Magellanic dwarf galaxy UGCA 86, made with the DRAO synthesis telescope. UGCA 86 is detected in the continuum at both frequencies, with 408 MHz flux density S 408 = 120 ± 30 mJy and 1.4 GHz flux density S 1400 = 79 ± 3 mJy. The H i structure of UGCA 86 is complex, with two separate components: a rotating disk and a ...

of chenodeoxycholic acid, with small amounts of lithocholic acid present as well. Spur cells manifested a striking increase in cholesterol content and in the cholesterol: phospholipid ratio, but a normal osmotic fragility. When incubated in heated normal serum, spur cells lost their excess cholesterol and became spherocytic and osmotically fragile. Conversely, sera from patients with spur cells...

gears are one of the most critical components in power transmission system of an automobile and also many rotating machinery. many studies have been conducted on optimum gear design. the main objective is to design different aluminium metal matrix composite spur gears before and after optimization. aluminium metal matrix material composites are preferred mostly due to their low density. also th...

The surface tooth wear which occurs at the gear contact region due to inadequate contact strength of the tooth is one of the predominant modes of gear failures. Currently, higher contact ratio spur gears are increasingly used in power transmission applications such as aircraft, wind turbine, automobiles and compact tracked vehicles due to their high load carrying capacity.  In this work, the di...

Nom.nel.tuN 110.03 Gear-Tooth Wear and Failure (USAS 86.12-1964) Jan. 1962 DunblJity 21S.JI Information Sheet for Surface Durability (Pitting) of Spur, Helical. Herringbone and Bevel Gear Teeth Sept. 1966 217.01 lntcrrnancn Sheet·Gear Scoring Design GUide for Aerospace Spur and Helical Power Gears Oct. 1965 Strentth 225.Q1 Information Sheet for Strength of Spur. Helical, Hernngbone and Bevel Ge...