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101.
102.
A. I. KOVÀCS 《Weed Research》1976,16(1):43-45
The recording of the stage of growth of crops and weeds by directly photocopying the plants is described. 相似文献
103.
104.
MB Allworth M McQuillan SR McGrath CS Wilson M Hernandez-Jover 《Australian veterinary journal》2023,101(3):121-126
Frothy bloat, associated predominantly with grazing legume-based pastures, is considered the second most costly disease in beef cattle in southern Australia, costing $84.4 M annually. It frequently results in the sudden death of cattle. In response to concerns from cattle producers, an online survey was conducted in southern Australia in late 2020 to determine the impact of bloat, identify risk factors and determine the efficacy of current preventive measures. For 217 responses, over two-thirds (70%) of producers reported bloat occurring in the previous 12 months, with estimated morbidity and mortality rates of 3.7% and 5.0% respectively. Bloat was associated with clover or clover-dominant paddocks (79%) and was not associated with grass or grass-dominant pastures or low clover pastures (92%) nor grazing crops (27%). For bloat that occurred in the past 12 months, cattle were very commonly grazing on clover or clover-dominant paddocks (90%) and occasionally lucerne-dominated paddocks (7%). Two-thirds of producers reported having preventive measures in place when losses occurred. Bayesian Network analysis confirmed that grazing clover-based pastures for more than 7 days, yearling cattle and the months of July–September were the main risk factors for bloat occurrence, with pasture type (clover) being the most important. Conversely, no clear relationship between weather conditions and bloat occurrence was evident. This survey highlights the known risk of clover-based pastures for causing bloat in cattle, and that losses occur in many cases despite preventive measures being used. This suggests that current methods for preventing bloat in cattle are suboptimal. 相似文献
105.
Binding targets of termiticidal lectins from the bark and leaf of Myracrodruon urundeuva in the gut of Nasutitermes corniger workers 下载免费PDF全文
106.
Mechanisms of quorum sensing and strategies for quorum sensing disruption in aquaculture pathogens 下载免费PDF全文
In many countries, infectious diseases are a considerable threat to aquaculture. The pathogenicity of micro‐organisms that infect aquaculture systems is closely related to the release of virulence factors and the formation of biofilms, both of which are regulated by quorum sensing (QS). Thus, QS disruption is a potential strategy for preventing disease in aquaculture systems. QS inhibitors (QSIs) not only inhibit the expression of virulence‐associated genes but also attenuate the virulence of aquaculture pathogens. In this review, we discuss QS systems in important aquaculture pathogens and focus on the relationship between QS mechanisms and bacterial virulence in aquaculture. We further elucidate QS disruption strategies for targeting aquaculture pathogens. Four main types of QSIs that target aquaculture pathogens are discussed based on their mechanisms of action. 相似文献
107.
A Kay E Arenholz S Mun Garcia de Abajo FJ CS Fadley R Denecke Z Hussain Van Hove MA 《Science (New York, N.Y.)》1998,281(5377):679-683
Measurements and theoretical calculations are reported for an interatomic multi-atom resonant photoemission (MARPE) effect that permits direct determination of near-neighbor atomic identities (atomic numbers). MARPE occurs when the photon energy is tuned to a core-level absorption edge of an atom neighboring the emitting atom, with the emitting level having a lower binding energy than the resonant level. Large peak-intensity enhancements of 33 to 105 percent and energy-integrated effects of 11 to 29 percent were seen in three metal oxides. MARPE should also be sensitive to bond distance, bonding type, and magnetic order, and be observable via the secondary processes of x-ray fluorescence and Auger decay. 相似文献
108.
109.
Gábor árpád CZIRJáK Lóránd Béla K?B?LKUTI Miklós TENK Attila SZAKáCS Attila KELEMEN Marina SP?NU 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(6):701-703
A natural hybrid of Vipera ammodytes × Vipera berus was
presented having low body weight, seizures and generalized swelling of the cephalic
region. Based on the history of the case and clinical examination, hemorrhagic stomatitis
of traumatic origin was diagnosed. The snake was kept in a terrarium with wood chips as a
substrate, and the material had induced trauma in the oral mucosa which was further
complicated with Salmonella Arizonae and Morganella
morganii co-infection, abscessation and osteomyelitis. To the best of the
authors’ knowledge, this is the first reported case of bacterial infection in European
snake hybrids and one of a few case reports in European snakes. Although wood chips are an
inexpensive substrate, based on our findings, they should be avoided when keeping and
breeding European vipers. 相似文献
110.
Summary In field studies carried out at Cuyo-Cuyo, southern Peru, an area of traditional agriculture, the varietal and ploidy richness of two potato fields cultivated by the Quechua Indians was determined. Tetraploid primitive varieties were the most common, representing 95% of all plants sampled, but diploids and triploids were also found. The tuber crops agricultural system on the Incaic terraces was documented, and factors affecting the selection of potato varieties were assessed. Flavour and dry matter content were the most important quality factors indicated by local farmers. 相似文献