 หัวเรื่อง:โพรโทซัวและแบคทีเรียในดินบริเวณรากพุทธรักษา แสม และสน ผู้เขียน: Ptumporn Muangphra, Arunee Sommani สื่อสิ่งพิมพ์:pdf Abstract Bacteria and Protozoa from three soil sources; first from Canna sp. near the Faculty of Science, Silpakorn University, Nakhon Pathom, second and third from Avicennia sp. and Casuarina sp. at Samutsakorn Province were analyzed. Each soil source was collected from rhizosphere and bare soil. The quantity of bacteria and protozoa were carried out by plate count method and standard dilution method respectively. The result showed that, in each soil source, protozoa and bacteria from rhizosphere were highly significant difference from the bare soil. Each rhizosphere gave the different growth for protozoa. The Canna root stimulated amoeba growth better than flagellate and ciliate. The Avicennia and Casuarina root stimulated ciliate growth better than flagellate and amoeba. |
หัวเรื่อง:ผลของ MS-222 และ Benzocaine ที่มีต่อการขนส่งปลากัด ผู้เขียน:Arunee Sommani, Sathaporn Kerdkriengkai, Nalin Ingkapairoj สื่อสิ่งพิมพ์:pdf AbstractAcute toxicity of MS-222 and benzocaine to Betta splendens Regan averaging 1.48 ? 0.30 g in weight were studied. By using Litchfield and Wilcoxon method, the results showed that the 96 hr LC50 with 95% confidence intervals of MS-222 and benzocaine were estimated to be 176 (172.89 - 179.17) ppm and 202 (199.21 - 204.83) ppm, respectively. The responding reaction could be divided into 4 periods: sedation, loss of equilibrium, loss of reflex activity, and medullary collapse. The suitable sedation concentration of MS-222 and benzocaine for 48 hours of fish transportation were 65-70 ppm and 80-85 ppm respectively. The fish could recover from the two anaesthetics within 3 to 5 minutes. It is recommended that MS-222 and benzocaine are more suitable to be used for anaesthetizes fish during transportation and benzocaine may be preferred as it is cheaper than MS-222. |