867 research outputs found

    Arterial capacitance changes with starvation-realimentation in the dog, and associated vascular electrolyte changes.

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    http://www.worldcat.org/oclc/1087998

    Effect of Thiamine, Riboflavin, Pantothenic Acid, and Niacin in Bovine Blood on the Economy of the Short-nosed Cattle Louse Haematopinus eurysternus (Nitzsch)

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    A livestock producer will usually experience a louse infestation among his cattle sometime during his career. Most of the cattle that become louse-infested are easily ridded of their lice. There may be, however, one animal in a herd which is particularly susceptible to the lice and becomes chronically infested. Sometimes the susceptible animal may become so heavily infested with lice that death occurs. Scharff (1962) stated that the death loss resulting from very heavy infestations of the short-nosed cattle louse, Hematopinus eurysternus (Nitzsch) was probably about one percent. The louse involve in the experiment was the short-nosed cattle louse, Hematopinus eurysternus (Nitzsch). This louse is a very important pest of beef cattle, appearing every fall and winter. According to Scharff (1962), this species is the most common louse infesting cattle in Montana during the winter months. Peterson et al. (1953) and Shemanchuk et al. (1960) demonstrated that infestations may become great enough to cause severe anemia and death to their victims. They draw so much blood that the animal’s body is unable to replace it by hemopiesis. The purpose of this thesis is to determine if the degree of louse infestation is related to the amount of riboflavin, thiamine, niacin, and pantothenic acid in the animal’s blood. Kemper (1953) stated that there may be some relationship between cattle louse infestation and the lack of some B-vitamins in the blood. Kartman (1949) observed that rats, deficient in thiamine, riboflavin and pantothenic acid, were more susceptible to pediculosis than rats not lacking the vitamins. Matthys (1946) suggested that the levels of vitamins A and D in the host apparently had no relationship to the infestation of cattle lice

    Dynamic Shear Modulus and Damping Ratio Predicted by a Unified 3-D Critical State Bounding Surface Plasticity Model

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    A unified 3-d critical state bounding surface plasticity model (gUTS) has been developed which is able to provide realistic simulations of the behavior of clays, silts and sands both in drained and undrained conditions over a wide range of monotonic and complex cyclic paths. A strong feature of this model is its ability to treat loose and dense states of the same material with a single set of material constants. The link between the two states is made by introducing an apparent normal consolidation line for sands and adopting a volumetric plastic strain hardening/softening model (similar to the critical state models for clays). This and other features enable the model to degenerate to simpler forms including the classic modified Cam-Clay formulation. To date, simulations have concentrated on the medium to high strain range (10-3 to 10-1). To address a wider strain range, this paper reports on a new series of simulations for sand in the range 10-6 to 10-

    I\u27m Only Sixteen

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    I\u27m only sixteen, \u27tis a nice little age,I would not be younger or older,Already I\u27ve conn\u27d over Love\u27s mystic page,And warm\u27d when I should have grown colder.I would like to be married,But wedlock, they say, Has troubles which I\u27ve never seen,So, I\u27d rather not barter my freedom away,For I\u27ve only just enter\u27d sixteen. I hate an old maid yet I don\u27t wish to wedUntil I have jilted my dozens;And the beaux who had been by my glances misled,I\u27d give to my young country cousins. Make hay while the sun shines, so wisely they say,Mine\u27s bright, and my pasture is green;I\u27ll think of November though blooming in May,For I\u27ve only just enterd sixteen. I\u27ve done with young fops they are playthings at best,And please while around you they flutter;The schoolgirls are getting to be quite a pest,And I warmly detest bread and butter.I can smile on a man if he\u27s not quite too old,Has whiskers is noble in mien;And i would not object to the music of gold,For I\u27ve only just enter\u27d sixteen

    Male involvement in sexual and reproductive health in the Mendi district, Southern Highlands province of Papua New Guinea: a descriptive study

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    BACKGROUND: Lack of male involvement and support for sexual and reproductive health services is seen by many Papua New Guinean women as a barrier to accessing services. Poor utilization of services by both men and women is reflected in high maternal mortality and high rates of HIV/AIDS and sexually transmitted infections in the Southern Highlands Province. It is therefore important to understand the type of services provided, men’s perceptions of these services and the Health Sector’s capacity to involve men in its programs. METHODS: Information from interviews of married men, officers in charge of health facilities, and information from a focus group discussion with village leaders was collected to assess possible constraints to reproductive and sexual health care delivery. RESULTS: Although many men had heard about antenatal care, supervised births, family planning and sexually transmitted infections including, HIV/AIDS, many were unaware of their importance and of the types of services provided to address these issues. There was a very strong association between men’s literacy and their knowledge of Sexual and Reproductive Health (SRH) issues, their discussion of these issues with their wives and their wives’ utilisation of sexual and reproductive health services. Some men considered SRH services to be important but gave priority to social obligations. Although men made most decisions for sexual and reproductive issues, pregnancy, child birth and rearing of children were regarded as women’s responsibilities. Knowledge of HIV/AIDS appeared to have changed sexual behaviour in some men. Services for men in this rural setting were inadequate and service providers lacked the capacity to involve men in reproductive health issues. CONCLUSION: Poor knowledge, socio-cultural factors and inadequate and inappropriate services for men hampered utilization of services and impaired support for their wives’ service utilization. Programmatic and policy initiatives should focus on improving service delivery to accommodate men in sexual and reproductive health

    Source summation in the vertical plane

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    Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.Includes bibliographical references (leaf 21).by John A. Crouch.M.Eng

    Beef Cattle and Pasture Production in the East Texas Timberlands.

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    36 p

    Social and Economic Study of Medieval London: The Walbrook Study A Summary Report with Appendix (containing property histories and indexes)

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    Summary report on a project studying, principally from the records of property holding, the history of the Walbrook area of the City of London up to the Great Fire of 1666. The Walbrook study area, comprising the ancient parishes of St Benet Sherehog, St Mary Woolchurch, St Mildred Poultry and St Stephen Walbrook, lies at the heart of the modern city of London. It includes Mansion House and the headquarters of several important financial institutions. It immediately adjoins the Bank of England and the Royal Exchange.Over virtually the entire period before the Great Fire, the Walbrook area was distinguished by the continuing involvement of its inhabitants in a changing range of specialised commodity trades, by its public market, and by the large houses of a small number of wealthy residents. This report summarises some of the results of the study based on a reconstruction, primarily from documentary sources, of the history of each house or other property in the area, providing a unique insight into the changing physical conditions of life of the citizens of London, and into their business and social affairs. A small sample of this material is presented in the Appendix, which contains histories of the church of St Mary Woolchurch and of the properties in the block bounded by the streets now known as Poultry and Bucklersbury, an index of property holders and a series of reconstructions maps covering the period from AD 1200 onwards

    Coulomb blockade of strongly coupled quantum dots studied via bosonization of a channel with a finite barrier

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    A pair of quantum dots, coupled through a point contact, can exhibit Coulomb blockade effects that reflect an oscillatory term in the dots' total energy whose value depends on whether the total number of electrons on the dots is even or odd. The effective energy associated with this even-odd alternation is reduced, relative to the bare Coulomb blockade energy for uncoupled dots, by a factor (1-f) that decreases as the interdot coupling is increased. When the transmission coefficient for interdot electronic motion is independent of energy and the same for all channels within the point contact (which are assumed uncoupled), the factor (1-f) takes on a universal value determined solely by the number of channels and the dimensionless conductance g of each individual channel. This paper studies corrections to the universal value of (1-f) that result when the transmission coefficent varies over energy scales of the size of the bare Coulomb blockade energy. We consider a model in which the point contact is described by a single orbital channel containing a parabolic barrier potential, and we calculate the leading correction to (1-f) for one-channel (spin-split) and two-channel (spin-degenerate) point contacts in the limit where the single orbital channel is almost completely open. By generalizing a previously used bosonization technique, we find that, for a given value of the dimensionless conductance g, the value of (1-f) is increased relative to its value for a zero-thickness barrier, but the absolute value of the increase is small in the region where our calculations apply.Comment: 13 pages, 3 Postscript figure
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