نتایج جستجو برای: mallard duck
تعداد نتایج: 5348 فیلتر نتایج به سال:
We report the complete genomic sequence of the full Muscovy duck parvovirus (MDPV) strain, designated GX2011-5, isolated from a Muscovy duck in Guangxi Province, China. The complete genomic sequence was 5,132 bp in length and contained two major open reading frames encoding a 1,844-nucleotide (nt) nonstructural protein and a 2,199-nt capsid protein. Comparison of the complete sequence of GX2011...
OBJECTIVE This study was carried out to detect chewing-lice found on some birds in Turkey. METHODS For this aim, a Eurasian collared dove (Streptopelia decaocto), a budgerigar (Melopsittacus undulatus) and a marbled duck (Marmaronetta angustirostris) were examined for the louse. RESULTS Columbicola bacillus (Giebel, 1866) was found on a Eurasian collared dove (Streptopelia decaocto), Afrime...
requested that the U.S. Fish and Wildlife Service (Service) conduct another assessment of the projected impacts of extended framework dates for duck hunting. To better assess the potential impact, the Service asked the Flyway Councils to survey their respective States concerning their interests in extended framework dates in each of their duck-hunting zones. Based on this survey, which assumed ...
In this commentary, we elaborate on the necessity to choose among a wider, higher-level conceptual approach and a more concrete, skills oriented one in HCI education, as a result of HCI enlarging scope and curriculum pressures. First, the role and usefulness of more abstract topics are discussed, and second, some reflections on how to cover them in HCI education are presented.
Duck meat sausages were prepared using 10% beef fat (FDS) and 10% hydrated cereal flours including rice (RDS), wheat, corn, millet, and barley to replace fat. Control duck sausages (DS) were also prepared only with duck meat and duck meat plus 10% beef fat. Results showed that protein and fat contents significantly decreased and total expressible fluid reduced with the addition of cereal flours...
Embryonic germ (EG) cells derived from primordial germ cells are undifferentiated and pluripotent stem cells. In our study, primordial germ cells isolated from the genital ridges of Beijing duck (Anas domestica) embryo at stage 28 were co-cultured with mice embryonic fibroblasts. Duck EG cells grew with a high nuclear:cytoplasm ratio and were positive for periodic acid-Schiff and alkaline phosp...
The blood parasite Leucocytozoon simondi is often associated with heavy mortality of ducks and geese, especially domestic ones, in North America. In contrast, in a previous study we found no mortality from L. simondi in our wild stock of mallard (Anas platyrhynchos) and American black duck (Anas rubripes) ducklings. However, because parasites can slow growth, which could extend the interval dur...
The IL-2Ralpha chain (CD25, Tac) is an essential component of high affinity IL-2Rs, playing critical role for the immune specificity of antigen-activated T-cell clonal expansion. Up to now, no duck cytokine receptor has been described. Here, the cDNA segment of a duck cytokine receptor (duCD25), encoding a 226 aa precursor protein with a 20 aa signal peptide, was isolated. Then a novel mouse mo...
Rice-duck farming system is one of the means of organic rice farming, in which the weeds, diseases and insects could be effectively controlled with minimal or no pesticide and herbicide application. Whereas in conventional rice-duck farming system the controlling effect on diseases, insect pests and weeds was slowly disappeared after the rice heading stage at which ducks were driven out of the ...
Inspired by the non-wetting phenomena of duck feathers, the water repellent property of duck feathers was studied at the nanoscale. The microstructures of the duck feather were investigated by a scanning electron microscope (SEM) imaging method through a step-by-step magnifying procedure. The SEM results show that duck feathers have a multi-scale structure and that this multi-scale structure as...
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