Effect of radiation parameters on the formation of radiolysis products in meat and meat substances     

C Merritt  P Angelini  R A Graham 《Journal of agricultural and food chemistry》1978,26(1):29-35

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Experimental closure of footpaths in a woodland national nature reserve in Scotland     

Neil G. Bayfield  Graham M. Bathe 《Biological conservation》1982,22(3):229-237

Visitors' reactions to six types of path barrier were recorded both by observation and by means of a questionnaire survey. ‘Natural’ barriers such as logs or branches were not very effective. A plank with notice was the most efficient barrier, and also the type most preferred by visitors. Barbed wire was effective but disliked by visitors. Few people objected to the closure of paths. Children and bird watchers took less notice of barriers than did other categories of visitors.  相似文献   

Bioaccumulation of Lead, Calcium and Strontium and their Relationships in the Octopus Octopus vulgaris     

Sónia Seixas  Graham Pierce 《Water, air, and soil pollution》2005,163(1-4):137-152

Octopuses (Octopus vulgaris) landed from commercial fishing were sampled and the concentrations of lead, calcium and strontium, in digestive gland, branchial heart, gills, mantle and arms, were determined using PIXE (particle-induced X-ray emission). Lead was detected in all tissues, although not in samples from all animals analysed. Female octopuses accumulated more lead in digestive gland than did males. The digestive gland index, an indicator of nutritional status, showed a negative correlation with lead concentration in both sexes. There were positive correlations between the concentration of lead and those of calcium and strontium in digestive gland and a negative correlation between lead and calcium in branchial heart tissue. Concentrations of calcium in arms were lower in autumn and spring than in winter and summer. Lead content increased with increasing body weight and mantle length so we can conclude that lead continues to accumulate during the animal’s life. Concentrations of lead in two samples were higher than the maximum legally permitted concentration of lead in food.  相似文献   

Organic matter status and the size, activity and metabolic diversity of the soil microbial community in the row and inter-row of sugarcane under burning and trash retention     

M.H. Graham 《Soil biology & biochemistry》2006,38(1):21-31

The concentrations of organic C, labile organic fractions and the size and activity of the microbial community were measured to a depth of 30 cm below the plant row and at distances of 30 and 60 cm into the inter-row area under sugarcane under pre-harvest burning or green cane harvesting with retention of a crop residue (trash) mulch. Total root mass was similar under burning and trashing but under trashing there was a redistribution of roots towards the surface 0-10 cm in the inter-row space as roots proliferated beneath the trash mulch. Soil organic C content decreased in response to both increasing distance from the plant row (to a depth of 20 cm) and burning rather than trashing (to a depth of 10 cm). Declines in K₂SO₄-extractable C, light fraction C, microbial biomass C, basal respiration and aggregate stability in response to distance and burning were much more marked than those for organic C and occurred to a depth of 30 cm. Bulk density was greater under burnt than trashed sugarcane and was greater in the inter-row than row, particularly under burning. Heterotrophic functional diversity (measured by analysis of catabolic response profiles to 36 substrates) was also investigated. Principal component analysis of response profiles demonstrated that soils below the row and those under trashing at 30 cm out from this row were separated from the other soils on PC1 and the sample from the inter-row centre (60 cm out) under burning was separated from the others on PC2. Catabolic evenness was least for the latter soil. It was concluded that soil in the inter-row of burnt sugarcane receives few inputs of organic matter and that conversion to green cane harvesting with retention of a trash mulch greatly improves the organic matter, microbial and physical status of the inter-row soil.  相似文献   

An assessment of nodulation and nitrogen fixation in inoculated Inga oerstediana, a nitrogen-fixing tree shading organically grown coffee in Chiapas, Mexico     

J.M. Grossman  C. Sheaffer  B. Bucciarelli  P.H. Graham 《Soil biology & biochemistry》2006,38(4):769-784

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一种新型鼓泡曝气装置的研究   总被引：4，自引：0，他引：4       下载免费PDF全文

李振安  Graham Sugget 《农业工程学报》1997,13(1):97-100

一种由增强ＰＶＣ材料制成的微孔曝气软管，外径２５ｍｍ，其管壁上有不通的锥孔，锥顶接近外表面，大端孔径０．０５ｍｍ，每米管长有２万个孔。在充气压力下，锥孔打开，并产生０．２５～１ｍｍ的气泡，额定过流能力为１ｍ^３／（ｈ·ｍ），试验表明该管有较高的增氧能力和增氧动力效率（４～６ｋｇ／ｋＷ·ｈ），可广泛用于污水处理和水产养殖  相似文献   

Large-scale vermicomposting: emission of nitrous oxide and effects of temperature on earthworm populations: The 7th international symposium on earthworm ecology · Cardiff · Wales · 2002   总被引：1，自引：0，他引：1  

James Frederickson  Graham Howell 《Pedobiologia》2003,47(5-6):724-730

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Letters     

Dr Stephen Collier  Dr Bob Bradley  Faith Rosson  Will Gartrell  Dr Bob Bradley  Alistair Webb  Dr Graham Thompson  Dr Elaine Cebuliak 《Australian veterinary journal》2001,79(5):320-322

Editor's note: The AVJ welcomes letters from members in all areas of the profession on matters of importance to you. Please keep them brief ‐ to meet our space constraints. Letters will be subject to minimal editing procedures. Subject to letters complying with the AVJ's legal responsibilities, they will not be censored. Nor will individuals or groups waging'‘campaigns’ be permitted to abuse these pages. If submitting a letter intended for publication, kindly identify it as such. Letters to the Editor can be sent by mail, fax or e‐mail at the contact points listed at the start of the News Section. Writers may use a pseudonym to protect their identities ‐ but must supply the Editor with verifiable names and points of contact.  相似文献   

Hypochondroplastic dwarfism (enchondral chondrodystrophy) in a dog   总被引：1，自引：0，他引：1  

M C Beachley  F H Graham 《Journal of the American Veterinary Medical Association》1973,163(3):283-284

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Avian botulism in winter and spring and the stability of Clostridium botulinum type C toxin.     

J M Graham  G R Smith  E D Borland  J W MacDonald 《The Veterinary record》1978,102(2):40-41

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