نتایج جستجو برای: bedding plane

تعداد نتایج: 121327  

Journal: :Geomechanics and geophysics for geo-energy and geo-resources 2023

Abstract Wellbore instability severely constrains the exploration and development of shale gas. In order to evaluate impacts anisotropy water on wellbore instability, three different types criteria are fitted strength data LMX shales with moisture contents. A new model transversely isotropic borehole stability considering compliance incremental tensor induced by natural fractures is proposed, t...

Journal: :Poultry science 2011
D M Miles D E Rowe T C Cathcart

Negative impacts on the environment, bird well-being, and farm worker health indicate the need for abatement strategies for poultry litter NH(3) generation. Type of bedding affects many parameters related to poultry production including NH(3) losses. In a randomized complete block design, 3 trials compared the cumulative NH(3) volatilization for laboratory-prepared litter (4 bedding types mixed...

Journal: :Laboratory animals 2005
C C Burn G J Mason

Moisture absorbency is one of the most important characteristics of rodent beddings for controlling bacterial growth and ammonia production. However, bedding manufacturers rarely provide information on the absorbencies of available materials, and even when they do, absorption values are usually expressed per unit mass of bedding. Since beddings are usually placed into cages to reach a required ...

Journal: :Journal of environmental quality 2006
Jim J Miller Edith C S Olson David S Chanasyk Bruce W Beasley L Jay Yanke Francis J Larney Tim A McAllister Barry M Olson L Brent Selinger

Soluble salts, nutrients, and pathogenic bacteria in feedlot-pen runoff have the potential to cause pollution of the environment. A 2-yr study (1998-1999) was conducted at a beef cattle (Bos taurus) feedlot in southern Alberta, Canada, to determine the effect of bedding material [barley (Hordeum vulgare L.) straw versus wood chips] and within-pen location on the chemical and bacterial propertie...

Journal: :Applied and environmental microbiology 2005
Margaret A Davis Karen A Cloud-Hansen John Carpenter Carolyn J Hovde

Outbreaks of Escherichia coli O157:H7 disease associated with animal exhibits have been reported with increasing frequency. Transmission can occur through contact with contaminated haircoats, bedding, farm structures, or water. We investigated the distribution and survival of E. coli O157:H7 in the immediate environments of individually housed, experimentally inoculated cattle by systematically...

1997
L. Bezrukov B. Monien W. Unger

We present embeddings of generalized ladders as subgraphs into the hypercube. By embedding caterpillars into ladders, we obtain embeddings of caterpillars into the hypercube. In this way we obtain almost all known results concerning the em-beddings of caterpillars into the hypercube. In addition we construct embeddings for some new types of caterpillars.

Journal: :international journal of civil engineering 0
seyed amirodin sadrnejad k.n.toosi university of tech hamid karimpour the catholic university of american

the present paper is devoted to a new critical state based plasticity model able to predict drained and undrained behaviour of granular material. it incorporates a bounding surface plasticity model describing in multilaminate framework to capitalize on advantages of this mathematical framework. most of the models developed using stress/strain invariants are not capable of identifying the parame...

2004
Jeff Johnston

Many pet owners, breeders and pet retailers favor wood chips as pet bedding for a variety of reasons. Most wood chips are inexpensive and depending on the wood used, wood chips can provide natural insecticidal, bactericidal or bacteriostatic properties. Such bedding can often kill or inhibit the spread of fleas, mites or other pests, and the resins and other aromatic chemicals emitted by the ch...

2009
Chihiro Homma Kazuyuki Yamada

The marble burying test is a simple behavioral psychopharmacology task in which rodents, especially rats and mice, are exposed to glass marbles laying on thick bedding materials. This test has been widely used to assess the effects of a variety of psychoactive drugs. Although the marble burying test clearly reflects drug efficacy, many aspects of the behavior itself remain unclear. In the prese...

Journal: :Applied and environmental microbiology 2011
Andreas Westphal Michele L Williams Fulya Baysal-Gurel Jeffrey T LeJeune Brian B McSpadden Gardener

Sand bedding material is frequently used in dairy operations to reduce the occurrence of mastitis and enhance cow comfort. One objective of this work was to determine if sand-based bedding also supported the microbiologically based suppression of an introduced bacterial pathogen. Bedding samples were collected in summer, fall, and winter from various locations within a dairy operation and teste...

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