55 research outputs found

    Identification of Thai cassava cultivars using SCAR markers and multiplex PCR

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    āļšāļ—āļ„āļąāļ”āļĒāđˆāļ­ āļĄāļąāļ™āļŠāļģāļ›āļ°āļŦāļĨāļąāļ‡āđ€āļ›āđ‡āļ™āļžāļ·āļŠāđ€āļĻāļĢāļĐāļāļāļīāļˆāļ—āļĩāđˆāļĄāļĩāļ„āļ§āļēāļĄāļŠāļģāļ„āļąāļ āđāļĨāļ°āļĄāļĩāļāļēāļĢāļ„āļąāļ”āđ€āļĨāļ·āļ­āļāļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļ—āļĩāđˆāļĄāļĩāđ€āļ›āļ­āļĢāđŒāđ€āļ‹āđ‡āļ™āļ•āđŒāđāļ›āđ‰āļ‡āļŠāļđāļ‡āđ€āļžāļ·āđˆāļ­āļ­āļļāļ•āļŠāļēāļŦāļāļĢāļĢāļĄ āđāļ•āđˆāļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļ—āļĩāđˆāđ„āļ”āđ‰āļĢāļąāļšāļāļēāļĢāļžāļąāļ’āļ™āļēāļ­āļēāļˆāļĄāļĩāļĨāļąāļāļĐāļ“āļ°āļŠāļąāļ“āļāļēāļ™āļ§āļīāļ—āļĒāļēāļ„āļĨāđ‰āļēāļĒāļ„āļĨāļķāļ‡āļāļąāļ™ āļ”āļąāļ‡āļ™āļąāđ‰āļ™āļāļēāļĢāļˆāļģāđāļ™āļāļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļˆāļķāļ‡āļ•āđ‰āļ­āļ‡āļ­āļēāļĻāļąāļĒāļšāļļāļ„āļĨāļēāļāļĢāļ—āļĩāđˆāļĄāļĩāļ„āļ§āļēāļĄāļŠāļģāļ™āļēāļ āļāļēāļĢāļĻāļķāļāļĐāļēāļ™āļĩāđ‰āļĄāļĩāļ§āļąāļ•āļ–āļļāļ›āļĢāļ°āļŠāļ‡āļ„āđŒāđ€āļžāļ·āđˆāļ­āļžāļąāļ’āļ™āļēāđ€āļ„āļĢāļ·āđˆāļ­āļ‡āļŦāļĄāļēāļĒāđ‚āļĄāđ€āļĨāļāļļāļĨāļŠāļģāļŦāļĢāļąāļšāļĢāļ°āļšāļļāļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļ‚āļ­āļ‡āļĄāļąāļ™āļŠāļģāļ›āļ°āļŦāļĨāļąāļ‡āđ„āļ—āļĒāļˆāļģāļ™āļ§āļ™ 16 āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļ—āļĩāđˆāđ„āļ”āđ‰āļˆāļēāļāđāļŦāļĨāđˆāļ‡āđ€āļŠāļ·āđ‰āļ­āļžāļąāļ™āļ˜āļļāļāļĢāļĢāļĄāđƒāļ™āļĻāļđāļ™āļĒāđŒāļ§āļīāļˆāļąāļĒāļžāļ·āļŠāđ„āļĢāđˆāļĢāļ°āļĒāļ­āļ‡ āđ‚āļ”āļĒāļ™āļģāđāļ–āļšāļ”āļĩāđ€āļ­āđ‡āļ™āđ€āļ­āļ‹āļķāđˆāļ‡āļĄāļĩāļ„āļ§āļēāļĄāđāļ•āļāļ•āđˆāļēāļ‡āļāļąāļ™āđƒāļ™āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļ•āđˆāļēāļ‡āđ† āļ—āļĩāđˆāđ„āļ”āđ‰āļˆāļēāļāļāļēāļĢāļ—āļģ HAT-RAPD āļĄāļēāđ‚āļ„āļĨāļ™āđāļĨāļ°āļŦāļēāļĨāļģāļ”āļąāļšāļ™āļīāļ§āļ„āļĨāļĩāđ‚āļ­āđ„āļ—āļ”āđŒ āđ€āļžāļ·āđˆāļ­āļ­āļ­āļāđāļšāļšāđ„āļžāļĢāđ€āļĄāļ­āļĢāđŒāļŠāļģāļŦāļĢāļąāļš SCAR āļ—āļĩāđˆāļĄāļĩāļ„āļ§āļēāļĄāļˆāļģāđ€āļžāļēāļ°āļˆāļģāļ™āļ§āļ™ 4 āļ„āļđāđˆ āđ‚āļ”āļĒ SCAR marker āļ—āļĩāđˆāđ„āļ”āđ‰āļŠāļēāļĄāļēāļĢāļ–āđƒāļŠāđ‰āļˆāļģāđāļ™āļāļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļ‚āļ­āļ‡āļĄāļąāļ™āļŠāļģāļ›āļ°āļŦāļĨāļąāļ‡āđ„āļ”āđ‰ āļ”āļąāļ‡āļ™āļĩāđ‰ (1) 308-bp marker āđāļĨāļ° 850-bp marker āđƒāļŠāđ‰āļĢāļ°āļšāļļāļ­āļąāļ•āļĨāļąāļāļĐāļ“āđŒāļ‚āļ­āļ‡āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļĢāļ°āļĒāļ­āļ‡ 60 āđāļĨāļ°āļŦāđ‰āļēāļ™āļēāļ—āļĩ āļ•āļēāļĄāļĨāļģāļ”āļąāļš (2) 414-bp marker āđƒāļŠāđ‰āļĢāļ°āļšāļļāļāļĨāļļāđˆāļĄāļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļĢāļ°āļĒāļ­āļ‡ 1 āļĢāļ°āļĒāļ­āļ‡ 11 āļĢāļ°āļĒāļ­āļ‡ 90 āļĢāļ°āļĒāļ­āļ‡ 86-13 āļŦāđ‰āļ§āļĒāļšāļ‡ 60 āđāļĨāļ°āđ€āļāļĐāļ•āļĢāļĻāļēāļŠāļ•āļĢāđŒ 50 (3) 273-bp marker āđƒāļŠāđ‰āļĢāļ°āļšāļļāļāļĨāļļāđˆāļĄāļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļĢāļ°āļĒāļ­āļ‡ 3 āļĢāļ°āļĒāļ­āļ‡ 9 āđāļĨāļ°āļĢāļ°āļĒāļ­āļ‡ 72 āđāļĨāļ° (4) 414-bp marker āđāļĨāļ° 273-bp marker āđƒāļŠāđ‰āļĢāļ°āļšāļļāļāļĨāļļāđˆāļĄāļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļĢāļ°āļĒāļ­āļ‡ 5 āđāļĨāļ°āļŦāđ‰āļ§āļĒāļšāļ‡ 80 āļ™āļ­āļāļˆāļēāļāļ™āļĩāđ‰ āļĒāļąāļ‡āđ„āļ”āđ‰āļĄāļĩāļāļēāļĢāļžāļąāļ’āļ™āļēāđ€āļ—āļ„āļ™āļīāļ„ multiplex PCR āļ—āļĩāđˆāđ€āļŦāļĄāļēāļ°āļŠāļĄāļāļąāļšāļāļēāļĢāđƒāļŠāđ‰āđ„āļžāļĢāđ€āļĄāļ­āļĢāđŒāļŠāļģāļŦāļĢāļąāļš SCAR āļžāļĢāđ‰āļ­āļĄāļāļąāļ™āļ—āļąāđ‰āļ‡ 4 āļ„āļđāđˆāđƒāļ™āļŦāļ™āļķāđˆāļ‡āļ›āļāļīāļāļīāļĢāļīāļĒāļē āđ€āļžāļ·āđˆāļ­āđƒāļŦāđ‰āļāļēāļĢāļ•āļĢāļ§āļˆāļŠāļ­āļšāļ”āļĩāđ€āļ­āđ‡āļ™āđ€āļ­āđ€āļ›āđ‰āļēāļŦāļĄāļēāļĒāļĄāļĩāļ„āļ§āļēāļĄāļĢāļ§āļ”āđ€āļĢāđ‡āļ§āđāļĨāļ°āļ›āļĢāļ°āļŦāļĒāļąāļ”āļĒāļīāđˆāļ‡āļ‚āļķāđ‰āļ™Â ABSTRACT   Cassava is an important economic crop which has been artificially selected to improve cultivars with high industrial yield of starch. Based on their morphoagronomic descriptors however, several improved cultivars are similar. Hence, accurate identification of each cultivar requires well-trained personnel. This study aimed to establish molecular markers for the identification of 16 Thai cassava cultivars from the germplasm collection in Rayong Field Crops Research Center. HAT-RAPD amplicons which were distinctive among the cultivars were employed for molecular cloning. Based on nucleotide sequences obtained four SCAR primer pairs were designed. SCAR markers were generated and used to differentiate the cultivars as follows: (1) 308-bp marker and 850-bp marker for Rayong 60 and Hanatee, respectively; (2) 414-bp marker for Rayong 1, Rayong 11, Rayong 90, Rayong 86-13, Huay Bong 60 and Kasetsart 50; (3) 273-bp marker for Rayong 3, Rayong 9 and Rayong 72; and (4) 414-bp and 273-bp markers for Rayong 5 and Huay Bong 80. For the procedure to be less time-consuming and more cost-effective, efficient multiplex PCR with optimal conditions was developed to incorporate all four pairs of SCAR primers in a single PCR reaction

    Species identification of economic bamboos in the genus Dendrocalamus using SCAR and multiplex PCR

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    Taxonomic and systematic studies of bamboos are traditionally based on floral morphology, but this can lead to difficulties in identification because of the irregular reproductive cycle of the bamboos. To overcome such problems several molecular-marker approaches have been used. In this study, eight species of the woody bamboos belonging to the genus Dendrocalamus were employed. For each species, DNA samples of 20 individual plants from different localities were isolated and then pooled to make eight bulks of DNA. Fifty RAPD primers were used to screen all bulked DNA samples. Only five primers yielded consistent and reproducible RAPD band patterns across all 160 individuals. The amplicons were present among five species of Dendrocalamus, but were absent in the other three species. They were cloned, sequenced and subsequently, five pairs of SCAR primers were designed. All SCAR primers were combined in multiplex PCR reactions to unequivocally discriminate five species of Dendrocalamus

    Antioxidant, Antibacterial and Anti-alpha Glucosidase Activities of Coral Mushroom Ramaria spp.

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    āļšāļ—āļ„āļąāļ”āļĒāđˆāļ­   āđ€āļŦāđ‡āļ”āļ›āļ°āļāļēāļĢāļąāļ‡āļŠāļāļļāļĨ Ramaria āļˆāļģāļ™āļ§āļ™ 10 āļ•āļąāļ§āļ­āļĒāđˆāļēāļ‡ āļˆāļąāļ”āļˆāļģāđāļ™āļāļŠāļ™āļīāļ”āļ•āļēāļĄāļĨāļąāļāļĐāļ“āļ°āļ—āļēāļ‡āļŠāļąāļ“āļāļēāļ™āļ§āļīāļ—āļĒāļēāđ„āļ”āđ‰ 9 āļŠāļ›āļĩāļŠāļĩāļŠāđŒ āļ”āļąāļ‡āļ™āļĩāđ‰ Ramaria aff. vinosimaculans (PKWS15-74 āđāļĨāļ° PKWS15-109), R. flava var. aurea (PKWS15-173), Ramaria sp.1 (PKWS15-92), Ramaria sp.2 (PKWS15-95), Ramaria sp.3 (PKWS15-164), Ramaria sp.4 (PKWS15-181), Ramaria sp.5 (PKWS15-194), Ramaria sp.6 (PKWS15-221) āđāļĨāļ° Ramaria sp.7 (PKWS14-02) āđ€āļĄāļ·āđˆāļ­āļ™āļģāļĄāļēāļŠāļāļąāļ”āļ”āđ‰āļ§āļĒāļŠāļēāļĢāļĨāļ°āļĨāļēāļĒāđ€āļ­āļ—āļēāļ™āļ­āļĨāđāļĨāļ°āļ—āļ”āļŠāļ­āļšāļ„āļļāļ“āļŠāļĄāļšāļąāļ•āļīāļ—āļēāļ‡āļŠāļĩāļ§āļ āļēāļžāļžāļšāļ§āđˆāļēāļŠāļēāļĢāļŠāļāļąāļ”āļˆāļēāļāđ€āļŦāđ‡āļ”āļ—āļļāļāļ•āļąāļ§āļ­āļĒāđˆāļēāļ‡āļĄāļĩāļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđƒāļ™āļāļēāļĢāļ•āđ‰āļēāļ™āļ­āļ™āļļāļĄāļđāļĨāļ­āļīāļŠāļĢāļ°āļ—āļĩāđˆāļ”āļĩāđ‚āļ”āļĒāđ€āļ‰āļžāļēāļ° PKWS15-164 āļ‹āļķāđˆāļ‡āļĄāļĩāļ„āđˆāļēāđƒāļāļĨāđ‰āđ€āļ„āļĩāļĒāļ‡āļāļąāļš positive control āļ™āļ­āļāļˆāļēāļāļ™āļĩāđ‰āļĒāļąāļ‡āļ•āļĢāļ§āļˆāļžāļšāļŠāļēāļĢāļŸāļĨāļēāđ‚āļ§āļ™āļ­āļĒāļ”āđŒāđāļĨāļ°āļŠāļēāļĢāļ›āļĢāļ°āļāļ­āļšāļŸāļĩāļ™āļ­āļĨāđƒāļ™āļ›āļĢāļīāļĄāļēāļ“āļ—āļĩāđˆāļŠāļđāļ‡ āđ€āļŠāđˆāļ™ PKWS15-164 (3,909.52Âą58.56 g QE/g extract) āđāļĨāļ° PKWS15-194 (3,765.88Âą33.75 g QE/g extract) āļ‹āļķāđˆāļ‡āļŠāļ­āļ”āļ„āļĨāđ‰āļ­āļ‡āļāļąāļšāļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđƒāļ™āļāļēāļĢāļ•āđ‰āļēāļ™āļ­āļ™āļļāļĄāļđāļĨāļ­āļīāļŠāļĢāļ° āļ—āļąāđ‰āļ‡āļ™āļĩāđ‰āđ€āļ™āļ·āđˆāļ­āļ‡āļˆāļēāļāļŠāļēāļĢāļŸāļĨāļēāđ‚āļ§āļ™āļ­āļĒāđŒāđ€āļ›āđ‡āļ™āļŠāļēāļĢāļ•āđ‰āļēāļ™āļ­āļ™āļļāļĄāļđāļĨāļ­āļīāļŠāļĢāļ°āļ—āļĩāđˆāļ”āļĩ āļŠāđˆāļ§āļ™āļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđƒāļ™āļāļēāļĢāļĒāļąāļšāļĒāļąāđ‰āļ‡āļāļēāļĢāđ€āļˆāļĢāļīāļāļ‚āļ­āļ‡āđāļšāļ„āļ—āļĩāđ€āļĢāļĩāļĒāļžāļšāļ§āđˆāļēāļŠāļēāļĢāļŠāļāļąāļ”āļŠāđˆāļ§āļ™āđƒāļŦāļāđˆāļŠāļēāļĄāļēāļĢāļ–āļĒāļąāļšāļĒāļąāđ‰āļ‡āļāļēāļĢāđ€āļˆāļĢāļīāļāļ‚āļ­āļ‡ Staphylococcus aureus āđ„āļ”āđ‰āļĄāļēāļāļ—āļĩāđˆāļŠāļļāļ”āļĢāļ­āļ‡āļĨāļ‡āļĄāļēāļ„āļ·āļ­ Escherichia coli, Bacillus subtilis āđāļĨāļ° Pseudomonas aeruginosa āļ•āļēāļĄāļĨāļģāļ”āļąāļš āļ™āļ­āļāļˆāļēāļāļ™āļĩāđ‰āļĒāļąāļ‡āļžāļšāļ§āđˆāļēāļŠāļēāļĢāļŠāļāļąāļ”āļˆāļēāļāđ€āļŦāđ‡āļ” PKWS15-181 (IC50 = 0.216 Âą0.026 mg/mL) āđāļĨāļ° PKWS15-194 (IC50 = 12.908 Âą0.110 mg/mL) āļĄāļĩāļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđƒāļ™āļāļēāļĢāļĒāļąāļšāļĒāļąāđ‰āļ‡āļāļēāļĢāļ—āļģāļ‡āļēāļ™āļ‚āļ­āļ‡āđ€āļ­āļ™āđ„āļ‹āļĄāđŒ alpha-glucosidase āđ„āļ”āđ‰āļ”āļĩāđ„āļĄāđˆāļ•āđˆāļēāļ‡āļˆāļēāļāļĒāļē acarbose (IC50 = 33.782 Âą0.523 mg/mL) āļ—āļĩāđˆāđƒāļŠāđ‰āļĢāļąāļāļĐāļēāđ‚āļĢāļ„āđ€āļšāļēāļŦāļ§āļēāļ™āļ­āļĒāđˆāļēāļ‡āļĄāļĩāļ™āļąāļĒāļŠāļģāļ„āļąāļāļ—āļēāļ‡āļŠāļ–āļīāļ•āļīāļ­āļĩāļāļ”āđ‰āļ§āļĒ āļ‚āđ‰āļ­āļĄāļđāļĨāļ—āļĩāđˆāđ„āļ”āđ‰āļˆāļēāļāļ‡āļēāļ™āļ§āļīāļˆāļąāļĒāļ™āļĩāđ‰āđāļŠāļ”āļ‡āđƒāļŦāđ‰āđ€āļŦāđ‡āļ™āļ§āđˆāļēāđ€āļŦāđ‡āļ”āļ›āļ°āļāļēāļĢāļąāļ‡ Ramaria āļŠāļēāļĄāļēāļĢāļ–āđƒāļŠāđ‰āđ€āļ›āđ‡āļ™āđāļŦāļĨāđˆāļ‡āļœāļĨāļīāļ•āļŠāļēāļĢāļ•āđ‰āļēāļ™āļ­āļ™āļļāļĄāļđāļĨāļ­āļīāļŠāļĢāļ° āļŠāļēāļĢāļ•āđ‰āļēāļ™āļāļēāļĢāđ€āļˆāļĢāļīāļāļ‚āļ­āļ‡āđāļšāļ„āļ—āļĩāđ€āļĢāļĩāļĒ āđāļĨāļ°āļŠāļēāļĢāļĨāļ”āļ›āļĢāļīāļĄāļēāļ“āļ™āđ‰āļģāļ•āļēāļĨāļ—āļĩāđˆāļĄāļĩāļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđāļŦāļĨāđˆāļ‡āđƒāļŦāļĄāđˆāđ„āļ”āđ‰āđƒāļ™āļ­āļ™āļēāļ„āļ• āļ„āļģāļŠāļģāļ„āļąāļ: āđ€āļŦāđ‡āļ”āļ›āļ°āļāļēāļĢāļąāļ‡ āļŸāļĨāļēāđ‚āļ§āļ™āļ­āļĒāļ”āđŒÂ  āļŠāļēāļĢāļ•āđ‰āļēāļ™āļ­āļ™āļļāļĄāļđāļĨāļ­āļīāļŠāļĢāļ° āļŠāļēāļĢāļ•āđ‰āļēāļ™āļˆāļļāļĨāļīāļ™āļ—āļĢāļĩāļĒāđŒ āđ€āļšāļēāļŦāļ§āļēāļ™Â ABSTRACT   Ten collections of coral mushroom genus Ramaria were identified to 9 species based on the morphological characteristics i.e. Ramaria aff. vinosimaculans (PKWS15-74 āđāļĨāļ° PKWS15-109), R. flava var. aurea (PKWS15-173), Ramaria sp.1 (PKWS15-92), Ramaria sp.2 (PKWS15-95), Ramaria sp.3 (PKWS15-164), Ramaria sp.4 (PKWS15-181), Ramaria sp.5 (PKWS15-194), Ramaria sp.6 (PKWS15-221) and Ramaria sp.7 (PKWS14-02). The Ramaria samples were then extracted with ethanol and screened for the bioactivities. The results showed that all extracts contained high antioxidant activity especially PKWS15-164. They were detected high number of flavonoids and total phenolic contents such as PKWS15-164 (3,909.52Âą58.56 g QE/g extract) and PKWS15-194 (3,765.88Âą33.75 g QE/g extract), which supported their results of antioxidant activity. Flavonoids are phenolic substances that act as antioxidants. The results of antibacterial activity revealed that most Ramaria extracts could inhibit the growth of Staphylococcus aureus followed by Escherichia coli, Bacillus subtilis and Pseudomonas aeruginosa, respectively. Moreover, the extracts of PKWS15-181 (IC50 = 0.216Âą0.026 mg/mL) and PKWS15-194 (IC50 = 12.908Âą0.110 mg/mL) exhibited high alpha-glucosidase inhibitory potential, which were not significantly different from diabetes mellitus drug as well as acarbose (IC50 = 33.782 Âą0.523 mg/mL). The results from this study indicated that the coral mushroom Ramaria species are new potential source of antioxidant, antibacterial and anti-alpha glucosidase activities in future.   Keywords: Coral mushroom, Flavonoids, Antioxidants, Antimicrobial activity, Diabetes mellitu

    Isolation of Bacteriophages Specific to a Fish Pathogen, Aeromonas spp., as a Candidate for Disease Control

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    āļšāļ—āļ„āļąāļ”āļĒāđˆāļ­   āļāļēāļĢāđƒāļŠāđ‰āđ€āļŸāļˆāđƒāļ™āļāļēāļĢāļĢāļąāļāļĐāļēāļāļēāļĢāļ•āļīāļ”āđ€āļŠāļ·āđ‰āļ­āļ–āļ·āļ­āđ€āļ›āđ‡āļ™āļ—āļēāļ‡āđ€āļĨāļ·āļ­āļāļŦāļ™āļķāđˆāļ‡āļ—āļĩāđˆāđƒāļŠāđ‰āļ›āđ‰āļ­āļ‡āļāļąāļ™āđāļĨāļ°āļ„āļ§āļšāļ„āļļāļĄāđ‚āļĢāļ„āļ•āļīāļ”āđ€āļŠāļ·āđ‰āļ­āļˆāļēāļāđāļšāļ„āļ—āļĩāđ€āļĢāļĩāļĒāđƒāļ™āļ­āļļāļ•āļŠāļēāļŦāļāļĢāļĢāļĄāļāļēāļĢāđ€āļžāļēāļ°āđ€āļĨāļĩāđ‰āļĒāļ‡āļŠāļąāļ•āļ§āđŒāļ™āđ‰āļģ āļ­āļĒāđˆāļēāļ‡āđ„āļĢāļāđ‡āļ•āļēāļĄāļāļēāļĢāļ›āļĢāļ°āļĒāļļāļāļ•āđŒāđƒāļŠāđ‰āđ€āļŸāļˆāđƒāļ™āļāļēāļĢāļ„āļ§āļšāļ„āļļāļĄāļāļēāļĢāļ•āļīāļ”āđ€āļŠāļ·āđ‰āļ­ Aeromonas spp. āļĒāļąāļ‡āļĄāļĩāđ„āļĄāđˆāļĄāļēāļāļ™āļąāļ āļ”āļąāļ‡āļ™āļąāđ‰āļ™āļˆāļļāļ”āļ›āļĢāļ°āļŠāļ‡āļ„āđŒāļ‚āļ­āļ‡āļ‡āļēāļ™āļ§āļīāļˆāļąāļĒāļ™āļĩāđ‰āļ„āļ·āļ­āļāļēāļĢāđāļĒāļāđ€āļŸāļˆāļ›āļĢāļ°āđ€āļ āļ—āļ—āļĩāđˆāļ—āļģāđƒāļŦāđ‰āđ€āļāļīāļ”āļāļēāļĢāđāļ•āļāļŠāļĨāļēāļĒāđ€āļžāļ·āđˆāļ­āļ„āļ§āļšāļ„āļļāļĄāđ€āļŠāļ·āđ‰āļ­ Aeromonas spp. āđāļĨāļ°āļ›āļĢāļ°āđ€āļĄāļīāļ™āļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđƒāļ™āļāļēāļĢāđƒāļŠāđ‰āđ€āļŸāļˆāđ€āļžāļ·āđˆāļ­āļ„āļ§āļšāļ„āļļāļĄāđ€āļŠāļ·āđ‰āļ­ Aeromonas spp. āđƒāļ™āļĢāļ°āļ”āļąāļšāļŦāđ‰āļ­āļ‡āļ›āļāļīāļšāļąāļ•āļīāļāļēāļĢ āļˆāļēāļāļ•āļąāļ§āļ­āļĒāđˆāļēāļ‡āļ™āđ‰āļģāļ„āļĨāļ­āļ‡āļˆāļģāļ™āļ§āļ™ 10 āđāļŦāļĨāđˆāļ‡ āļŠāļēāļĄāļēāļĢāļ–āđāļĒāļāđ€āļŠāļ·āđ‰āļ­ Aeromonas spp. āđ„āļ”āđ‰āđ€āļžāļĩāļĒāļ‡āļŠāļēāļĒāļžāļąāļ™āļ˜āļļāđŒāđ€āļ”āļĩāļĒāļ§āļ„āļ·āļ­ Aeromonas sp. OG-H āđāļĨāļ°āļ™āļģāļĄāļēāđƒāļŠāđ‰āđ€āļ›āđ‡āļ™āđ‚āļŪāļŠāļ•āđŒāđ€āļžāļ·āđˆāļ­āđƒāļŠāđ‰āđƒāļ™āļāļēāļĢāđāļĒāļāđ€āļŸāļˆ āđ‚āļ”āļĒāļŠāļēāļĄāļēāļĢāļ–āđāļĒāļāđ€āļŸāļˆāđ„āļ”āđ‰ 2 āļ•āļąāļ§āļ—āļĩāđˆāđāļ•āļāļ•āđˆāļēāļ‡āļāļąāļ™āđāļĨāļ°āđƒāļŦāđ‰āļŠāļ·āđˆāļ­āļ§āđˆāļē FOG1 āđāļĨāļ° FOG3 āļˆāļēāļāļāļēāļĢāļ•āļĢāļ§āļˆāļ”āļđāļĢāļđāļ›āļĢāđˆāļēāļ‡āļ‚āļ­āļ‡āđ€āļŸāļˆāļ āļēāļĒāđƒāļ•āđ‰āļāļĨāđ‰āļ­āļ‡āļˆāļļāļĨāļ—āļĢāļĢāļĻāļ™āđŒāļ­āļīāđ€āļĨāđ‡āļ„āļ•āļĢāļ­āļ™āđāļšāļšāļŠāđˆāļ­āļ‡āļœāđˆāļēāļ™āļžāļšāļ§āđˆāļē āđ€āļŸāļˆāļ—āļąāđ‰āļ‡ 2 āļ•āļąāļ§āļˆāļąāļ”āļ­āļĒāļđāđˆāđƒāļ™āđāļŸāļĄāļīāļĨāļĩ Myoviridae āđ€āļŸāļˆāļ—āļąāđ‰āļ‡āļŠāļ­āļ‡āļ•āļąāļ§āļŠāļēāļĄāļēāļĢāļ–āļ•āļīāļ”āđ€āļŠāļ·āđ‰āļ­āđ„āļ”āđ‰āđƒāļ™ Aeromonas sp. OG-H āđ€āļžāļĩāļĒāļ‡āļŠāļēāļĒāļžāļąāļ™āļ˜āļļāđŒāđ€āļ”āļĩāļĒāļ§ āđāļĨāļ°āļĄāļĩāļ„āļ§āļēāļĄāđ€āļŠāļ–āļĩāļĒāļĢāļ•āđˆāļ­ pH āđāļĨāļ°āļ­āļļāļ“āļŦāļ āļđāļĄāļī āđƒāļ™āļŠāđˆāļ§āļ‡ 4.0-11.0 āđāļĨāļ° 30-65 āļ­āļ‡āļĻāļēāđ€āļ‹āļĨāđ€āļ‹āļĩāļĒāļŠ āļ•āļēāļĄāļĨāļģāļ”āļąāļš āđ€āļĄāļ·āđˆāļ­āļ™āļģāļĄāļēāļ—āļ”āļŠāļ­āļšāļāļēāļĢāļ„āļ§āļšāļ„āļļāļĄāđ€āļŠāļ·āđ‰āļ­ Aeromonas sp. OG-H āđƒāļ™āļĢāļ°āļ”āļąāļšāļŦāđ‰āļ­āļ‡āļ›āļāļīāļšāļąāļ•āļīāļāļēāļĢāļžāļšāļ§āđˆāļē āļāļēāļĢāļ—āļ”āļĨāļ­āļ‡āļ—āļĩāđˆāļĄāļĩāļāļēāļĢāđ€āļ•āļīāļĄāđ€āļŸāļˆāļāđˆāļ­āļ™āļāļēāļĢāđ€āļ•āļīāļĄāđ€āļŠāļ·āđ‰āļ­āļˆāļ°āļŠāļēāļĄāļēāļĢāļ–āļĨāļ”āļˆāļģāļ™āļ§āļ™āđ€āļŠāļ·āđ‰āļ­āđ„āļ”āđ‰āđƒāļ™āļŠāđˆāļ§āļ‡ 12 āļŠāļąāđˆāļ§āđ‚āļĄāļ‡āđāļĢāļāļ­āļĒāđˆāļēāļ‡āđ€āļŦāđ‡āļ™āđ„āļ”āđ‰āļŠāļąāļ” āļˆāļēāļāļ‚āđ‰āļ­āļĄāļđāļĨāļ—āļĩāđˆāđ„āļ”āđ‰āļŠāļĩāđ‰āđƒāļŦāđ‰āđ€āļŦāđ‡āļ™āļ§āđˆāļēāđ€āļŸāļˆ āļ—āļąāđ‰āļ‡āļŠāļ­āļ‡āļ•āļąāļ§āļĄāļĩāļ›āļĢāļ°āļŠāļīāļ—āļ˜āļīāļ āļēāļžāđƒāļ™āļāļēāļĢāļ™āļģāđ„āļ›āđƒāļŠāđ‰āđƒāļ™āļāļēāļĢāļ„āļ§āļšāļ„āļļāļĄāļāļēāļĢāļ•āļīāļ”āđ€āļŠāļ·āđ‰āļ­ Aeromonas āđ„āļ”āđ‰   āļ„āļģāļŠāļģāļ„āļąāļ: Aeromonas āđāļšāļ„āđ€āļ—āļ­āļĢāļīāđ‚āļ­āđ€āļŸāļˆ āļ„āļ§āļēāļĄāđ€āļŠāļ–āļĩāļĒāļĢāļ•āđˆāļ­āļ­āļļāļ“āļŦāļ āļđāļĄāļī āļ„āļ§āļēāļĄāđ€āļŠāļ–āļĩāļĒāļĢāļ•āđˆāļ­ pH  ABSTRACT Phage therapy can be used as an alternative method to prevent and control pathogenic bacteria in aquaculture. However, applications of bacteriophages for a control of Aeromonas spp. infection are still limited.  Therefore, the aims of this study were to isolate lytic bacteriophages of Aeromonas spp. from canals and to evaluate the effectiveness of these phages to control Aeromonas spp. at the laboratory level. From 10 collecting sites, one isolate of Aeromonas designated as Aeromonas sp. OG-H was obtained and employed as a host for isolation of the phages. Two different phages were obtained, and specified as FOG1 and FOG3. Electron micrographs revealed that all isolated phages belonged to the family Myoviridae. These phages were highly specific to their host (Aeromonas sp. OG-H) and relatively stable at the pH and temperature ranging from 4.0 to 11.0 and 30 to 65â—ĶC, respectively. An in vitro study of the effect of bacteriophages against Aeromonas sp. OG-H revealed a remarkable decrease of the pathogen at 12 h, followed by bacterial regrowth to pre-treatment levels. These data suggested that the phages FOG1 and FOG3 are efficient as biocontrol agents against Aeromonas infection.   Keywords: Aeromonas, Bacteriophage, Temperature stability, pH stabilit

    HAT-RAPD Fingerprinting Analysis of Thai Cassava Germplasm and Economic Cultivars of Farmers’ Preferences

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    āļšāļ—āļ„āļąāļ”āļĒāđˆāļ­āļāļēāļĢāļĻāļķāļāļĐāļēāļ„āļ§āļēāļĄāļŦāļĨāļēāļāļŦāļĨāļēāļĒāļ—āļēāļ‡āļžāļąāļ™āļ˜āļļāļāļĢāļĢāļĄāļ‚āļ­āļ‡āļĄāļąāļ™āļŠāļģāļ›āļ°āļŦāļĨāļąāļ‡ (Manihot esculenta Crantz) āļˆāļģāļ™āļ§āļ™ 19 āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļ āđ‚āļ”āļĒāđƒāļŠāđ‰āđ€āļ—āļ„āļ™āļīāļ„ high annealing temperature-random amplified polymorphic DNA (HAT-RAPD) āļ›āļĢāļ°āļāļ­āļšāļ”āđ‰āļ§āļĒāļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļ—āļĩāđˆāđ„āļ”āđ‰āļˆāļēāļāđāļŦāļĨāđˆāļ‡āđ€āļŠāļ·āđ‰āļ­āļžāļąāļ™āļ˜āļļāļāļĢāļĢāļĄāļ‚āļ­āļ‡āļĻāļđāļ™āļĒāđŒāļ§āļīāļˆāļąāļĒāļžāļ·āļŠāđ„āļĢāđˆāļĢāļ°āļĒāļ­āļ‡ 16 āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļ āđāļĨāļ°āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļ‹āļķāđˆāļ‡āđ€āļ›āđ‡āļ™āļ—āļĩāđˆāļ™āļīāļĒāļĄāļ‚āļ­āļ‡āđ€āļāļĐāļ•āļĢāļāļĢ 3 āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāļˆāļēāļāļˆāļąāļ‡āļŦāļ§āļąāļ”āļ™āļ„āļĢāļĢāļēāļŠāļŠāļĩāļĄāļē āđƒāļ™āļāļēāļĢāđƒāļŠāđ‰āđ„āļžāļĢāđ€āļĄāļ­āļĢāđŒāđāļšāļšāļŠāļļāđˆāļĄāļ—āļąāđ‰āļ‡āļŦāļĄāļ” 28 āđ„āļžāļĢāđ€āļĄāļ­āļĢāđŒ āļžāļšāļ§āđˆāļē 21 āđ„āļžāļĢāđ€āļĄāļ­āļĢāđŒāđƒāļŦāđ‰āđāļ–āļšāļ”āļĩāđ€āļ­āđ‡āļ™āđ€āļ­āļ—āļĩāđˆāļĄāļĩāļ„āļ§āļēāļĄāđāļ•āļāļ•āđˆāļēāļ‡ āđ€āļĄāļ·āđˆāļ­āļ§āļīāđ€āļ„āļĢāļēāļ°āļŦāđŒāļ„āļ§āļēāļĄāļ•āđˆāļēāļ‡āļ—āļēāļ‡āļžāļąāļ™āļ˜āļļāļāļĢāļĢāļĄāļ‚āļ­āļ‡āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāđāļ•āđˆāļĨāļ°āļ„āļđāđˆāđ‚āļ”āļĒāđƒāļŠāđ‰ Nei’s genetic distance āļžāļšāļ§āđˆāļēāļĄāļĩāļ„āļ§āļēāļĄāđāļ•āļāļ•āđˆāļēāļ‡āļ•āļąāđ‰āļ‡āđāļ•āđˆ 3 āļ–āļķāļ‡ 82% āļ™āļ­āļāļˆāļēāļāļ™āļĩāđ‰āđ€āļ”āļ™āđ‚āļ”āļĢāđāļāļĢāļĄāđāļŠāļ”āļ‡āļ„āļ§āļēāļĄāļŠāļąāļĄāļžāļąāļ™āļ˜āđŒāļ—āļēāļ‡āļžāļąāļ™āļ˜āļļāļāļĢāļĢāļĄāļ‚āļ­āļ‡āļĄāļąāļ™āļŠāļģāļ›āļ°āļŦāļĨāļąāļ‡āļ—āļĩāđˆāļĻāļķāļāļĐāļēāļ”āđ‰āļ§āļĒ unweighted pair group  method with arithmetic mean (UPGMA) āļˆāļēāļāđāļ–āļšāļ”āļĩāđ€āļ­āđ‡āļ™āđ€āļ­āļ—āļĩāđˆāļĄāļĩāļ„āļ§āļēāļĄāđāļ•āļāļ•āđˆāļēāļ‡āļˆāļģāļ™āļ§āļ™ 61 āđāļ–āļš āļŠāļēāļĄāļēāļĢāļ–āļˆāļąāļ”āļāļĨāļļāđˆāļĄāļ—āļąāđ‰āļ‡ 19 āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļ āđ€āļ›āđ‡āļ™ 5 āļāļĨāļļāđˆāļĄ āđ‚āļ”āļĒāđāļšāđˆāļ‡āđ€āļ›āđ‡āļ™āļ•āļąāļ§āļ­āļĒāđˆāļēāļ‡āļ‚āļ­āļ‡āļžāļąāļ™āļ˜āļļāđŒāļ‚āļĄāļˆāļģāļ™āļ§āļ™ 4 āļāļĨāļļāđˆāļĄ āđāļĨāļ°āļžāļąāļ™āļ˜āļļāđŒāļŦāļ§āļēāļ™āļˆāļģāļ™āļ§āļ™ 1 āļāļĨāļļāđˆāļĄ āļ āļēāļĒāđƒāļ™āļāļĨāļļāđˆāļĄāļ‚āļ­āļ‡āļžāļąāļ™āļ˜āļļāđŒāļ‚āļĄāļžāļš 3 āļžāļąāļ™āļ˜āļļāđŒāļ›āļĨāļđāļāđ€āļĻāļĢāļĐāļāļāļīāļˆāļ—āļĩāđˆāļ™āļīāļĒāļĄāđ‚āļ”āļĒāđ€āļāļĐāļ•āļĢāļāļĢ āđ„āļ”āđ‰āđāļāđˆ āļžāļąāļ™āļ˜āļļāđŒāđ€āļāļĨāđ‡āļ”āļĄāļąāļ‡āļāļĢ (āļĄāļĩāļ„āļ§āļēāļĄāļŠāļąāļĄāļžāļąāļ™āļ˜āđŒāđƒāļāļĨāđ‰āļŠāļīāļ”āļāļąāļšāļžāļąāļ™āļ˜āļļāđŒāļĢāļ°āļĒāļ­āļ‡ 72) āļžāļąāļ™āļ˜āļļāđŒāđ„āļˆāđāļ­āļ™āļ—āđŒ (āļˆāļąāļ”āļ­āļĒāļđāđˆāđƒāļ™āļāļĨāļļāđˆāļĄāđ€āļ”āļĩāļĒāļ§āļāļąāļ™āļāļąāļšāļžāļąāļ™āļ˜āļļāđŒāļŦāđ‰āļ§āļĒāļšāļ‡ 60 āđāļĨāļ°āļžāļąāļ™āļ˜āļļāđŒāļŦāđ‰āļ§āļĒāļšāļ‡ 80) āđāļĨāļ°āļžāļąāļ™āļ˜āļļāđŒāļ™āļēāļ„āļ‚āļēāļ§ (āļˆāļąāļ”āļ­āļĒāļđāđˆāđƒāļ™āļāļĨāļļāđˆāļĄāđ€āļ”āļĩāļĒāļ§āļāļąāļ™āļāļąāļšāļžāļąāļ™āļ˜āļļāđŒāļĢāļ°āļĒāļ­āļ‡ 3 āđāļĨāļ°āļžāļąāļ™āļ˜āļļāđŒāļĢāļ°āļĒāļ­āļ‡ 5) āļ„āļģāļŠāļģāļ„āļąāļ: āļĄāļąāļ™āļŠāļģāļ›āļ°āļŦāļĨāļąāļ‡ āđāļŦāļĨāđˆāļ‡āđ€āļŠāļ·āđ‰āļ­āļžāļąāļ™āļ˜āļļāļāļĢāļĢāļĄāļĄāļąāļ™āļŠāļģāļ›āļ°āļŦāļĨāļąāļ‡ āđ€āļ—āļ„āļ™āļīāļ„ HAT-RAPD āļ§āļīāļ˜āļĩ UPGMAABSTRACTSixteen cultivars of cassava (Manihot esculenta Crantz) were obtained from the germplasm collection in Rayong Field Crops Research Center, and three other economic cultivars of farmers’ preferences from a well-established cassava plantation in Nakhon Ratchasima. Genetic diversity of these nineteen cultivars was assessed by high annealing temperature-random amplified polymorphic DNA (HAT-RAPD) technique. Out of 28 random primers used, 21 generated polymorphic bands. Pairwise distances between taxa calculated using Nei’s genetic distance varied from 3 to 82%. An unweighted pair group method with arithmetic mean (UPGMA) dendrogram constructed based on 61 RAPD characters classified all 19 cultivars into five clusters, four of which containing bitter-type accessions and one accommodating sweet-type accessions. The bitter-type clusters possessed three cultivars of farmers’ preferences, including Gled Mangorn (closely related to Rayong 72), Giant (placed with Huay Bong 60 and Huay Bong 80), and Nak Khao (placed with Rayong 3 and Rayong 5).Keywords: Manihot esculenta Crantz, cassava germplasm, HAT-RAPD technique, UPGMA metho

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