95 research outputs found
Patogenez invazionnykh boleznejj na fone teorii stressa
No full textThe author stating that the defensive reactions of the body of the host to the invasion of parasites has a stressor character he deals closer with the invasion of the larvae Ascaris suum Goeze, 1782 as a stressor which causes a typical alarm reaction (AR), which in turn is an element of the general and local adaptation syndrome (GAS and LAS). In particular he submits to discussion the current views on the changes in the haemogram of hosts of the larvae of worms and the observed differences of these changes in relation to changes taking place in the blood owing to the action of other, not parasitic stressors, explains among others by the allergic character of the pathological changes of the host's organism in parasitological invasions. The author stresses also the meaning of the vitamin C defficiency for the development of the pathological processes in invasive diseases and sees the possibility to regard the parasitologic stress as the control mechanism by way of increasing the production of the hormones of the pituitary gland and adrenals and by way of influencing the course of the allergic proccsses in organisms affected with a parasitic invasion. Expressing the opinion, that Selye 's theory is particular useful for the synthetic presentation of the problem of the pathogenesis of parasitic diseases the author points, however, to the need to develop studies on the role of the central nervous system, which according to his view is very essential in the pathogenesis of invasive diseases
An analysis of the use of canonical signed digit coding of coefficients for implementing digital filters without multipliers
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Izbiratel'nost' Ehktoparazitov na fone velichiny khozjaina
No full textThe degree of infestation is only to some extent indicative of host preference. Infestation percent and the mean number of ectoparasites on a host depend on a large number of factors including, as Mohr (1961) assumes, the dimentions of the host. Bearing on observations upon ticks and chiggers Mohr tends to generalize and assumes the difference in infestation by lice also depend on host surface. The question of a possible correlation between the host size and lousiness has not yet been properly investigated. The author tries to find a confirmation of the discussed opinion in the results of other investigations. Contributions towards the problem of differences in lice number during the postnatal development of the host have been fragmentary only. As we know, some differences in infestation exist between young and adult hosts, but this phenomenon can be explained without taking into account the size of the host surface. The attempt to prove the discussed opinion in an indirect way, i.e. by comparison of infestations in two host species, should be based on figures concerning the same louse species on two hosts much resembling each other from the biological point of view and differing, if possible, in size only. Umfortunately, there are but few data like that in world litterature concerning lice. The present author compares the infestation by lice of 4 groups of hosts: Apodemus agrarius – Micromys minutus, Arvicola terrestris - Microtus ratticeps; Rattus norvegicus - R. rattus, Apodemus flavicollis - Clethrionomys glareolus, but is not able in this indirect way either to find any support of the discussed problem. In the present state of knowledge facts concerning possible correlation between host size and the amount of specimens of some ticks and chiggers (and possibly fleas, too), based on the biology of the respective arthropods, are not sufficient as far as ectoparasites in general, and lice in particular, are concerned
Bell's British theatre 1791-1802; 1797. 49 plays unrepresented in ed of 1776-1781 and 1784. With a new pref. and with new author and play indexes
No full textBell's British theatre 1791-1802; 1797. 49 plays unrepresented in ed of 1776-1781 and 1784. With a new pref. and with new author and play indexes
No full textBell's British theatre 1791-1802; 1797. 49 plays unrepresented in ed of 1776-1781 and 1784. With a new pref. and with new author and play indexes
No full textBell's British theatre 1791-1802; 1797. 49 plays unrepresented in ed of 1776-1781 and 1784. With a new pref. and with new author and play indexes
No full textBell's British theatre 1791-1802; 1797. 49 plays unrepresented in ed of 1776-1781 and 1784. With a new pref. and with new author and play indexes
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