نتایج جستجو برای: floor and cage system
تعداد نتایج: 17126791 فیلتر نتایج به سال:
Abstract The article analyzes technical solutions for separate feeding of chickens and roosters a broiler parent flock with the cage keeping breeder flock. It is noted that hens meat crosses adopted as process standard in industrial poultry. Failure to comply this requirement decreases percentage fertilized eggs, increases mortality, culling males problems replanting reserve roosters. Installat...
we have two part in this thesis, at first: the interaction of native calf thymus dna (ct-dna) with two anthraquinones including quinizarin (1,4- dihydroxy anthraquinone) and danthron (1,8- dihydroxy anthraquinone) in a mixture of 0.04 m brittone-robinson buffer and 50% of ethanol were studied at physiological ph by uv-vis absorption, florescence, circular dichroism spectroscopic methods, viscos...
This research is a numerical investigation of the thermal performance of the floor heating system integrated with metallic bridges. For this goal, aluminum and galvanized metallic bridges with 0.5 mm thickness were embedded within the free space of the pipes. Two different bridge lengths of P/S=1/3, 2/3, and 1 were studied in this paper in which P and S are the bridge length and free space betw...
The purpose of this study was to compare environmental conditions and mice in cages with four different mechanical ventilation designs and a static isolator cage. Environmental conditions (air velocity, temperature, relative humidity, bedding weight change, airborne dust, NH3, and CO2) were compared for each cage type (n = 5 per cage). Bedding type was chipped hardwood. Mouse response in each c...
BACKGROUND Individuals engaged in work in intensive animal houses experience some of the highest rates of occupationally related respiratory symptoms. Organic dust and in particular endotoxin has been most closely associated with respiratory symptoms and lung function changes in workers. It has previously been shown that for intensive poultry operations, type of poultry housing [cage-housed (CH...
The egg production sector is in a transitional period with regard to the permitted housing systems, i.e. rearing conventional cages under certain conditions complete ban of any form cage system. changes were caused by concern for layer wellfare but expected effects on productivity as well. aim research was determine floor space allowance and non-cage systems feather score laying hens three ages...
composite steel concrete composite floor used mainly in the commercial and office building has lighter weight and is considered very economical. the light weight natures of this type of floor causes some vibration problems when it is subjected to loadings such as human footstep loading. the dynamic characteristics of these floors are dependent on several parameters such as joist span, girder sp...
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