The population diversity of chestnut blight fungus, Cryphonectria parasitica and its double strand RNA were studied in this thesis.dsRNA virus of Cryphonectria parasitica was studied by use of biological assay and gel electrophoresis.

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In order to study the distribution and position of HFRSV in chigger mite, in situ hybridization was used for detection of hemorrhagic fever with renal syndrome virus RNA.

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Subsequent experiments with over-expression and RNAi further established that chymotrypsin upregulation was a ...

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An algorithm for finding a near-maximum independent set in a circle graph is presented.

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The mRNA of pituitary glands from seven important economic Pleuronectiformes fishes was extracted,the cDNA sequences of GH gene were then isolated from Cleisthenes herzensteini,Limanda yokohamae,Pleuronichthys Cornutus,Cynoglossus robustus,Platichthys bicoloratus, Zebrias zebra and Paralichthys dentatus with RT-PCR method by using designed specific primers based on the reported GH cDNA sequences of Pleuronectiformes. The results of sequencing showed that lengths of the above cDNAs are as follows: 479 bp,564 bp,519 bp,440 bp,564 bp,440 bp and 522 bp.The GH cDNA sequences encode mature polypeptide of about 140 to 170 amino acid.The full-length growth hormone cDNAs of Paralichthys lethostigma and Scophthalmus maximus were cloned by Switching Mechanism At 5\' end of the RNA Transcript RACE technology.

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RESULTS:（1）Three KDR-siRNA expression vectors were digested by Nde Ⅰ and Sma Ⅰ and produced two fragments of 713 bp, 5 480 bp and 2 403 bp, 3 790 bp, respectively, which were congruous with expectation.

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Cinnamaldehyde and citral have directly or indirectly interfered the conventional synthesis of fungal hereditary DNA and RNA and normal differentiation of conidiophore in A. flavus and A. fumigatus, thus inhibiting the normal cell cycle and the growth and propagation of fungi.

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In recent years, a defense mechanism has been discovered, which turns out to be conserved among eukaryotes.

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Contagious infections, viral in disease, and enforced by coronaviruses and picornaviruses are the forces that prey upon individuals, generally infecting them with acute viral nasopharyngitis or acute coryza, as they strike upon the upper respiratory system with a vengence.

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In the first place,we describe the formation for calculation of meanly minimum free energy and covariation value and how to combine them to predict the consensus secondary structure of homology RNAs.

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