Effects of ventilation and air temperature on pollution levels in underground car parks     

M. I. Yaziz  A. W. P. Yen 《Water, air, and soil pollution》1989,44(3-4):375-385

The relationship between the levels of CO and airborne Pb was evaluated against conditions of traffic flow, ambient air temperature and the ventilation rates in 3 underground car parks. During the study period significant variations were noted in the levels of the pollutants in each of the car parks which frequently exceeded the proposed Malaysian Air Quality Standard of 0.7 μg m^?3Pb and 9 μg L^?1 (8 hr average) CO for indoor environs. High correlation coefficient values were obtained between the levels of CO and traffic flow and Pb and traffic flow. High traffic flow also increased the mean air temperature inside the car parks. Reductions in the ventilation rates in the car parks caused an almost two-fold increase in the level of CO and vice versa. A simple mathematical model depicting the CO concentrations in relation to other parameters was formulated.  相似文献   

Quantitative determination of plant opal content in soils, using a combined method of heavy liquid separation and alkali dissolution   总被引：3，自引：1，他引：2  

J. HERBAUTS  F.-A. DEHALU  W. GRUBER 《European Journal of Soil Science》1994,45(4):379-385

The aim of this study was to improve the quantitative determination of the plant opal content (i.e. phytoliths) in soils. The proposed method is based on: (i) the separation of plant opal from the silt and sand fractions of the soil, using heavy liquid flotation (aqueous solution of ZnBr₂, density = 1.92 g cm^?3); (ii) the subsequent determination of alkali-soluble silicon by atomic absorption spectrometry. Extraction and analytical procedures were tested on a broad sample of temperate and tropical soils with very different phytolith contents. Our investigations lead to the following conclusions: (i) a selective dissolution of opal in alkaline solutions (e.g. hot 0.5 m NaOH as proposed by Jones, 1969) is inaccurate so that a sink-float method must be used before any dissolution procedure; (ii) to dissolve opal completely, a 0.5 M NaOH dissolution treatment at 150°C can be easily and successfully carried out in steel PTFE-lined pressure vessels; (iii) the reproducibility of the determination is satisfactory for a step-by-step procedure (mean coefficient of variation = 13.4%). The comparison of this new method of quantitative assessment of soil opal with two other methods (gravimetric and phytolith-counting methods), shows very highly significant correlations (P<0.001). Therefore, this procedure is a useful tool in studies connected with pedological and environmental history.  相似文献   

Utilisation de la technique d'immunoempreinte pour l'étude de la résistance à la sharka chez les Prunus1     

F. DICENTA  J. M. AUDERGON 《EPPO Bulletin》1994,24(3):749-753

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Cutaneous papilloma with viral replication in an old dog.     

I Narama  K Ozaki  H Maeda  A Ohta 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1992,54(2):387-389

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Plasma and extracellular volume in calves: comparison between isotopic and 'cold' techniques.     

A J Wagstaff  I Maclean  A R Michell  P H Holmes 《Research in veterinary science》1992,53(2):271-273

While isotopic techniques have largely superseded traditional markers for the determination of the volume of fluid compartments in vivo, they are not always convenient, especially with diarrhoeic animals. A direct comparison was therefore made in week-old calves between Evans blue and radio-iodinated serum albumin as measures of plasma volume and thiocyanate or 24sodium as measures of extracellular fluid space. The correlation coefficients were excellent (1.00, 0.96; P < 0.001) and the calves had plasma and extracellular fluid volumes of 72 +/- 2 and 438 +/- 2 ml kg-1, respectively. The latter value is, though high, typical of young animals and comparable with other data in calves.  相似文献   

Purulent streptococcal lymphadenitis in swine.     

F Real  O Ferrer  J L Rodriguez 《The Veterinary record》1992,131(7):151-152

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Effect of dietary protein content on episodic growth hormone secretion and on heat production of male broiler chickens.   总被引：1，自引：0，他引：1  

J Buyse  E Decuypere  L Berghman  E R Kühn  F Vandesande 《British poultry science》1992,33(5):1101-1109

1. The effect of the crude protein content (200 and 150 g/kg) of isoenergetic diets on episodic growth hormone (GH) release and on heat production was investigated in male broiler chickens. 2. Decreasing the crude protein content of isoenergetic diets from 200 g/kg (HP diet) to 150 g/kg (LP diet) resulted in depressed body weight gain, impaired food conversion efficiency and increased abdominal fat deposition. 3. The pattern of growth hormone secretion was markedly affected by dietary treatment. Broiler chickens fed on the LP diet had higher overall mean, amplitude, baseline and peak frequency than the HP chickens. 4. The LP chickens produced more heat per unit of metabolic body weight than the HP chickens. 5. The hypothesis relating the pattern of GH secretion to protein conversion efficiency was corroborated.  相似文献   

Hyperadrenocorticism in four cats.     

W F Immink  A J van Toor  J H Vos  J S van der Linde-Sipman  A A Lubberink 《The Veterinary quarterly》1992,14(3):81-85

This paper describes four cats with hyperadrenocorticism. Cat 1 showed polydipsia and polyphagia. Diabetes mellitus was initially diagnosed. As the animal appeared to be insulin resistant, pituitary and adrenocortical function tests were performed and the diagnosis of hyperadrenocorticism was made. Resistance to the high-dose dexamethasone suppression test was noticed in this cat. Pathological examination revealed a pituitary chromophobe adenoma. Cat 2 presented with diabetes mellitus, which was treated with insulin. The animal had a pendulous abdomen and its coat was in a poor condition. The low-dose dexamethasone suppression test demonstrated hyperadrenocorticism. Necropsy findings of pituitary tumour and hyperplasia of the adrenal cortex confirmed the diagnosis. Cat 3 showed clinical abnormalities indicative of hyperadrenocorticism, for instance, muscle weakness, alopecia, multiple abscesses. The diagnosis of hyperadrenocorticism was confirmed by the results of the lowe-dose dexamethasone suppression test. Pathological examination revealed an adrenocortical carcinoma. Cat 4 presented with polydipsia. The cause of this symptom was not found initially. One and a half years later additional symptoms, such as nephritis and polyphagia developed. Hyperadrenocorticism was diagnosed because of a palpable mass cranial to the left kidney. The diagnosis was confirmed by the results of the lowe-dose dexamethasone suppression test and the necropsy findings.  相似文献   

Effects of Diet Form on Golden Shiner Notemigonus crysoleucas Performance     

Delbert M. Gatlin III  Harold F. Phillips 《Journal of the World Aquaculture Society》1988,19(2):47-50

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Pathogenicity of SAD rabies vaccine given orally in chacma baboons (Papio ursinus).     

J Bingham  C M Foggin  H Gerber  F W Hill  A Kappeler  A A King  B D Perry  A I Wandeler 《The Veterinary record》1992,131(3):55-56

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