Showing papers by "University of Bedfordshire published in 1983"
TL;DR: The data suggest that the distribution of EGF receptors and EGF cell surface receptor number in skin are important in the spatial and temporal control of epithelial proliferation.
128 citations
TL;DR: EDTA significantly reduced the number and severity of patch test reactions to nickel sulphate but not those to potassium dichromate or trivalent chromium, and the minimum level of each metal required to provoke a patch test reaction was considerably greater than that found in fabric washing powder solutions.
Abstract: Minimum eliciting levels of nickel have been estimated in 25 nickel-sensitive subjects, and of chromium in 14 chromium-sensitive subjects by patch tests with aqueous solutions of the respective metals. The minimum level of each metal required to provoke a patch test reaction was considerably greater than that found in fabric washing powder solutions and was in the majority of patients tested of the order of 112 ppm nickel (0.05% nickel sulphate) or 885 ppm hexavalent chromium (0.25% potassium dichromate). One nickel-sensitive subject and one chromium-sensitive subject reacted to 1 ppm of the respective metal. Fabric washing powder did not significantly alter the patch test reaction to nickel sulphate or provoke reactions in nickel- or chromium-sensitive subjects. EDTA significantly reduced the number and severity of patch test reactions to nickel sulphate but not those to potassium dichromate or trivalent chromium.
87 citations
TL;DR: In this article, the wedging stresses generated by the formation of insoluble corrosion products have been measured during the exfoliation corrosion of the high strength aluminium alloy L95, and it has been concluded that the degradation occurs by a stress corrosion mechanism.
56 citations
01 Jun 1983
28 citations
TL;DR: In this paper, experiments were described which study the effect of density and chop length on the rate of diffusion of oxygen into silage and equations were presented which enable the rate to be calculated under laboratory conditions.
Abstract: SUMMARY Experiments are described which study the effect of density and chop length on the rate of diffusion of oxygen into silage and equations are presented which enable the rate of diffusion to be calculated under laboratory conditions. The concept of zero porosity is also discussed and methods of calculating the density at which it occurs are given. The effect of carbon dioxide on the rate of diffusion is also discussed.
27 citations
TL;DR: A case of gross, painless hematuria is reported as the late and only presenting feature of appendicitis.
16 citations
TL;DR: The results suggest that care has to be taken regarding the time period over which the weighing equipment is used, and it is important that as many records as possible are obtained during a period of the day when body weight is not varying substantially.
Abstract: 1. Automatic equipment for estimating mean body weight was tested on layer replacement pullets on litter and in a cage. 2. The automatic method gave as good a record as manual weighing for the purpose of controlling food intake. 3. The results suggest that care has to be taken regarding the time period over which the weighing equipment is used. 4. It is important that as many records as possible are obtained during a period of the day when body weight is not varying substantially.
15 citations
TL;DR: In the middle of the nineteenth century, Iran was shaken by a series of serious upheavals caused by the Bābī movement as discussed by the authors, which led to the constitional movement in Iran, and on the other hand, to the establishment of the now world-wide Bahā'ī Faith.
Abstract: In the middle of the nineteenth century, Iran was shaken by a series of serious upheavals caused by the Bābī movement. Although of short duration, these upheavals engulfed the entire country and had far-reaching effects in that they formed the first of a chain of events that led on the one hand, to the constitional movement in Iran, and on the other, to the establishment of the now world-wide Bahā'ī Faith.
11 citations
Patent•
17 May 1983TL;DR: In this paper, a vibratory distribution system for flowable material such as bulk food products has a number of vibratable cascaded elongate primary conveyor channel sections tilted to one side about their longitudinal axes to cause the product to gravitate towards the lower side wall of each section.
Abstract: A vibratory distribution system for flowable material such as bulk food products has a number of vibratable cascaded elongate primary conveyor channel sections tilted to one side about their longitudinal axes to cause the product to gravitate towards the lower side wall of each section. Each side wall has an opening through which product falls into a respective secondary conveyor section which carries the product to packaging. The flow rate of product can be precisely controlled by selective activation of the conveyor section, and by varying the vibration amplitude of the operating conveyor sections.
11 citations
TL;DR: It is concluded that yeast fatty acid synthetase has a medium-chain thioesterase binding site and is most marked under conditions of rate-limiting malonyl-CoA availability.
Abstract: The interaction of rat mammary gland medium-chain thioesterase with yeast fatty acid synthetase has been investigated
1
Medium-chain thioesterase interacts with yeast fatty acid synthetase causing premature chain termination of the fatty acids synthesized from acetyl-CoA and malonyl-CoA This effect is most marked under conditions of rate-limiting malonyl-CoA availability
2
Immobilized yeast fatty acid synthetase specifically binds rat mammary gland medium-chain thioesterase This interaction has been used to purify medium-chain thioesterase to near homogeneity from samples of rat mammary gland cytosol
3
The stoichiometry of binding of medium-chain thioesterase to yeast fatty acid synthetase has been investigated Yeast fatty acid synthetase binds 57 ± 1 mol medium-chain thioesterase/mol yeast fatty acid synthetase
4
It is concluded that yeast fatty acid synthetase has a medium-chain thioesterase binding site
9 citations
TL;DR: In this paper, it was shown that vegetables with similar physical properties cooled at very similar rates and values were given for calculating either the quantity of air needed to cool vegetables in a given time or the rate any depth of vegetables will cool when ventilated at a given airflow rate.
TL;DR: In this article, field experiments using formulations of propionic acid with or without addition of 8-quinolinol to control molding and heating of hay are described and discussed, and it is concluded that extensive and careful sampling and testing are necessary to distinguish the effects of preservatives from other factors affecting preservation.
TL;DR: In this paper, bituminous coal samples from 84 distinct sources were analysed by conventional British Standards (BS) methods for phosphorus, sulphur, chlorine, ash and the ash-forming elements (calcium, silicon, aluminium, iron, sodium, magnesium, potassium, titanium and manganese).
01 Jan 1983
TL;DR: In this article, the progress made with the development of three thermal energy storage technologies: stratified water, encapsulated phase change material and saturated salt solutions is summarised, and results are presented of experiments on a full scale, 2.8 m3, water store and on smaller scale versions of the other two stores.
Abstract: This paper summarises the progress made with the development of three thermal energy storage technologies: stratified water, encapsulated phase change material and saturated salt solutions. Results are presented of experiments on a full scale, 2.8 m3, water store and on smaller scale versions of the other two stores. Computer models of each store have been developed and their validity is discussed. Initial results from a solar heating system optimisation program
Patent•
16 Dec 1983TL;DR: In this article, a fluidized bed shell boiler is described in which the sides of the bed within the furnace tube are generally vertical, being provided by vertical walls within the furnaces.
Abstract: Description is of fluidized bed shell boiler arrangements in which the sides of the bed within the furnace tube are generally vertical, being provided by vertical walls within the furnace tube. The bed walls may include water tubes or be substantially vertical portions of arcuate panels mounted within the furnace tube. Fluidizing gas is fed to fluidizing gas ducts communicating with the bed from a plenum chamber including paddles movable into positions closing off at least some of the ducts during initial start up of the boiler to reduce the amount of combustible gas (or hot gases) fed to the ducts when heating the bed to its operating temperature. The ducts may be formed by mounting halfround or U-shaped member on the bottom of the furnace tube, the ducts tapering along their lengths such that the gas passing into the bed exits at substantially the same velocity across the width and length of the bed. Control of the bed level is effected by determining if material is passing out of an aperture set in the bed wall at the height at which the bed is to be maintained and then adding or subtracting bed material as required.
TL;DR: In this paper, a trend chart was produced for each project, but the lines joining the successive predicted dates for each event could not be drawn by the machine but had to be drawn manually.
TL;DR: Two contrasting immune responses to antigens presented by way of the intestinal mucosa have been identified in the young preruminant calf, both of which exert a significant effect on the health and nutritional performance of the animal.
Abstract: In the young animal the main antigenic problems affecting immune function and related integrity of the gut surface are of microbial or dietary origin. In the young preruminant calf, we have characterized two distinctly different immune responses to antigens presented orally, one detrimental and the other beneficial. The young calf responds to certain soya proteins in its diet by developing high levels of serum antibody associated with an IgG, precipitin that fixes complement.' This antibody response relates to the type of soya protein fed, physiological disturbances in the intestine, and the degree of lowered nutritional performance ~btained.' ,~ The response was greater in younger animals and was enhanced by passive acquisition of maternal antibody to soya protein from colostrum! Biopsy studies showed that there was partial atrophy of the villi and intensive mononuclear-cell infiltration of the lamina in these animals.' Significant improvements in performance, together with a lack of antibody response could be obtained by feeding soya proteins lacking in the antigenic components responsible for the observed morphological disturbances. Studies in calves in which Thiry-Vella intestinal loops had been established showed that there was no noticeable secretion of intestinal antibody in response to perfusion of soya protein. This phenomenon is in contrast to the response of young calves to bacterial polysaccharide antigens administered orally. Here, a marked secretory antibody response occurs that is predominantly associated with IgA and IgM. There was no detectable serum antibody response to these antigens. Oral immunization of young calves with milk replacer diets containing enteropathogenic E. coli antigens resulted in significant improvements in health and performance when compared to animals not i m m u n i ~ e d . ~ In conclusion, two contrasting immune responses to antigens presented by way of the intestinal mucosa have been identified in the young preruminant calf. Both responses exert a significant effect on the health and nutritional performance of the animal, the one beneficial and the other detrimental.