排序方式： 共有53条查询结果，搜索用时 15 毫秒
41.
Toole GA Le Gall G Colquhoun IJ Johnson P Bedo Z Saulnier L Shewry PR Mills EN 《Journal of agricultural and food chemistry》2011,59(13):7075-7082
Fifty bread wheat (Triticum aestivum L.) cultivars were selected from the HEALTHGRAIN germplasm collection based on variation in their contents of total and water-extractable arabinoxylan. FT-IR spectroscopic mapping of thin transverse sections of grain showed variation in cell wall arabinoxylan composition between the cultivars, from consisting almost entirely of low-substituted arabinoxylan (e.g., T.aestivum 'Claire') to almost entirely of highly substituted arabinoxylan (e.g., T.aestivum 'Manital') and a mixture of the two forms (e.g., T.aestivum 'Hereward'). Complementary data were obtained using endoxylanase digestion of flour followed by HP-AEC analysis of the arabinoxylan oligosaccharides. This allowed the selection of six cultivars for more detailed analysis using FT-IR and (1)H NMR spectroscopy to determine the proportions of mono-, di-, and unsubstituted xylose residues. The results of the two analyses were consistent, showing that variation in the composition and structure of the endosperm cell wall arabinoxylan is present between bread wheat cultivars. The heterogeneity and spatial distribution of the arabinoxylan in endosperm cell walls may be exploited in wheat processing as it may allow the production of mill streams enriched in various arabinoxylan fractions which have beneficial effects on health. 相似文献
42.
Zoltan Bacs Katalin Szabo Levente Czegledi Jozsef Nemeth Peter Fraknoi Peter Kovacs Andras Javor Balazs Varga Bela Juhasz Zoltan Szilvassy 《Animal Science Journal》2019,90(6):769-773
Polyunsaturated fatty acid consumption has been shown to improve insulin sensitivity. We studied if administration of broth with beef meat enriched with polyunsaturated fatty acids influenced glucose‐stimulated insulin release in healthy male volunteers. Broth was made either from cattles undergone dietary supplementation with lightly bruised whole linseed in addition to feeding ad libitum on grass silage (test meal) or from those fed grass silage alone (control meal). Oral glucose tolerance tests (OGTT) were performed in patients after a 6‐day period of eating 300 ml broth containing 100 g meat once a day in addition to their otherwise normal mixed nourishment. During OGTT, blood samples were taken for blood glucose level and plasma insulin immunoreactivity before and 15, 30, 60, 90, 120, and 180 min after the glucose load. Glucose‐stimulated maximum increase in plasma insulin immunoreactivity was 42 ± 6.6 and 81 ± 7.4 mU/ml (p < 0.05) after the test and the control meals, respectively. However, both fasting and postload blood glucose levels were the same after either meal period. The results suggest an insulin‐sensitizing effect of food produced from beef cattle maintained on linseed diet in healthy human volunteers. 相似文献
43.
44.
We propose a game-theoretic model for a first-price sealed-bid auction (FPSB auction) of standing timber. A FPSB auction means that bidders simultaneously submit sealed bids so that no bidder knows the bid of any other participant. The highest bidder pays the submitted price. The mathematical model has been elaborated considering only two bidders. Each bidder is supposed to know only the probability distribution of the bid of the other bidder. Using appropriate distributions, the adversity and propensity of a bidder to risk can be described. From the view point of a bidder, the conservative solution is calculated for both types of the other bidder. If a standing timber belongs to a public owner, the market has to follow a public evidence procedure, including public auctions. The function obtained is illustrated with a numerical example of a typical standing timber auction from a forest located in central Italy. Considering average costs and prices of the local chestnut timber market, winning bids and expected gains are estimated. Their amounts are comparable with the currently average stumpage price registered in this market. 相似文献
45.
Caterina Camerota Noura Raddadi Alan Pizzinat Elena Gonella Elena Crotti Rosemarie Tedeschi Netta Mozes-Daube Ibolya Ember Zoltan Acs Maria Kolber Einat Zchori-Fein Daniele Daffonchio Alberto Alma 《Phytoparasitica》2012,40(3):213-221
Psyllids, as vectors of phloem-restricted plant pathogens, are serious agricultural pests. Fruit tree phytoplasmas are transmitted by different Cacopsylla spp., while other psyllids are known vectors of liberibacters. Recently, the bacterium ??Candidatus Liberibacter europaeus?? was found in pear trees and in Cacopsylla pyri (Linnaeus), the vector of ??Ca. Phytoplasma pyri??. This new species does not cause symptoms in plants and is probably a symbiont rather than a pathogen. Based on these findings and the assumption that ??Ca. Liberibacter europaeus?? is widespread, we studied its distribution in the genus Cacopsylla and in the respective host and shelter plants (where psyllids aestivate and overwinter), as well as its possible co-presence with ??Ca. Phytoplasma?? spp. We tested 14 Cacopsylla species and 11 plant species from northwestern Italy, Hungary and Israel, characterized by warm oceanic, temperate continental and warm Mediterranean climatic conditions, respectively. ??Ca. Liberibacter europaeus?? was common within the Cacopsylla genus, being present in nine of the 14 species screened as well as in most host plants, whereas none of the shelter plants tested positive for this bacterium. Altogether, these findings indicate the presence of ??Ca. Liberibacter europaeus?? in continental zones, whereas it does not seem to be widespread in the Mediterranean region. Furthermore, lack of specific symptoms in all infected plants confirms an endophytic relationship with this bacterium, while its abundance in insects suggests a beneficial role for the host. Co-infections with phytoplasmas, observed in insects and plants, require further study to evaluate the possible interactions between them. 相似文献
46.
Summary The effect of various forms of treatment — chemical, thermal and pressure — on the tensile properties of wood was investigated. Spruce was impregnated in water, sodium sulfite and/or sodium bicarbonate, and heated at temperatures ranging from 20 to 190 °C. At the end of cooking (190 °C), decompression was applied both slowly and suddenly.A rise in temperature, an increase in heating time, from 4 to 10 min. at 190 °C, as well as fast pressure release influenced the tensile strength. The chemical treatment resulted in lignin sulfonation while carboxylation produced fiber swelling and, consequently, tensile strength decreased.The authors wish to thank the FCAR (Québec), NSERC (Canada) and Stake Tech. Co. for their financial support 相似文献
47.
Mariann Rakszegi Mark D. Wilkinson Paola Tosi Alison Lovegrove Geza Kovacs Zoltan Bedo Peter R. Shewry 《Journal of Cereal Science》2009
Six tetraploid (5 Triticum turgidum and 1 Triticum timopheevii) and four hexaploid (three Triticum aestivum and one Triticum kiharae) taxa of Triticum were studied in order to identify novel variation in Pin genes and proteins which can be exploited in the improvement of cultivated wheat. Western blotting with a highly specific antibody showed that puroindoline proteins were present in all of the hexaploid lines but were absent from the tetraploids. The immunoreactive bands differed slightly in their relative mobilities and their relative amounts, which could have resulted from variation in the allelic forms of Pin a and Pin b. This was supported by HPLC analyses which showed differences in the retention times and peaks heights of the putative puroindoline components in T. kiharae and T. timopheevii. Sequence analyses of cDNAs also showed variation in the sequences of expressed puroindoline genes. In particular, a sequence encoding a new form of Pin b was present in T. aestivum ssp. macha. 相似文献
48.
Martinek B Huber J Kofler J Bago Z 《Berliner und Münchener tier?rztliche Wochenschrift》2003,116(7-8):328-332
This case report describes the clinical, radiographic, ultrasonographic and histopathological findings of a six-month-old heifer, suffering from bilateral fracture of the calcaneal tuber caused by osteochondrosis. The young cattle was admitted to the clinic for the evaluation of a left hindlimb lameness, having persisted for several weeks. Orthopaedic examination revealed a highly stilted gait with a lameness of the left hind limb, so severe that the heifer was only able to put some weight on the tip of the toe. The calcaneal region on both hindlimbs showed a diffuse swelling, palpation being very painful. The radiological examination revealed a fracture of the calcaneal tuber (apophyseolysis) of both hindlimbs. 相似文献
49.
Zoltan S Gyimesi Michael M Garner Roy B Burns Donald K Nichols Roger E Brannian James T Raymond Kockanda B Poonacha Melissa Kennedy John W Wojcieszyn Robert Nordhausen 《Journal of zoo and wildlife medicine》2005,36(1):103-110
Hematopoietic malignancies are the most commonly reported neoplasms in lizards, occurring sporadically as in other reptiles. An unusually high incidence of lymphoid neoplasia occurred in a collection of Egyptian spiny-tailed lizards (Uromastyx aegyptius) from 1993-2001. Eight of 15 lizards necropsied at the Louisville Zoological Garden (53%) had multicentric lymphoma. Immunohistochemistry was not useful in characterizing the lineage of normal or neoplastic lymphocytes. By light and electron microscopy (EM), the neoplasms had plasmacytoid morphologic features suggesting B-cell origin, although some tumors also had a primitive lymphoblast component. A concurrent leukemic blood profile was identified in seven of the cases (88%). All were adult animals and no sex predilection was observed. No exposure to exogenous carcinogens was observed. Some of the lizards were unrelated, so hereditary factors were unlikely. Although examination by EM and viral isolation performed on archived tissues and plasma failed to detect viruses, an infectious etiology still warrants consideration. 相似文献
50.
Since the early 1980s, investigations by health departments of eight counties in southern New Jersey, by the NJ Department of Environmental Protection (NJDEP), and subsequently by the US Geological Survey (USGS), have shown that Hg concentrations in water tapped by about 600 domestic wells exceed the maximum contaminant level (MCL) of 2 μg/L. The wells are finished in the areally extensive unconfined Kirkwood-Cohansey aquifer system of New Jersey's Coastal Plain; background concentrations of Hg in water from this system are < 0.01 μg/L. Evidence of contributions from point sources of Hg, such as landfills or commercial and industrial hazardous-waste sites, is lacking. During 1996–2003, the USGS collected water samples from 203 domestic, irrigation, observation, and production wells using ultraclean techniques; septage, leach-field effluent, soils, and aquifer sediments also were sampled. Elevated concentrations of NH4, B, Cl, NO3, and Na and presence of surfactants in domestic-well water indicate that septic-system effluent can affect water quality in unsewered residential areas, but neither septage nor effluent appears to be a major Hg source. Detections of hydrogen sulfide in ground water at a residential area indicate localized reducing conditions; undetectable SO4 concentrations in water from other residential areas indicate that reducing conditions, which could be conducive to Hg methylation, may be common locally. Volatile organic compounds (VOCs), mostly chlorinated solvents, also are found in ground water at the affected areas, but statistically significant associations between presence of Hg and VOCs were absent for most areas evaluated. Hg concentrations are lower in some filtered water samples than in paired unfiltered samples, likely indicating that some Hg is associated with particles or colloids. The source of colloids may be soils, which, when undisturbed, contain higher concentrations of Hg than do disturbed soils and aquifer sediments. Soil disturbance during residential development and inputs from septic systems are hypothesized to mobilize Hg from soils to ground water. 相似文献