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Thongprajukaew K.,Kasetsart University | Thongprajukaew K.,Prince of Songkla University | Kovitvadhi U.,Kasetsart University | Kovitvadhi S.,Bansomdejchaopraya Rajabhat University | And 3 more authors.
Aquaculture | Year: 2011

The effects of four modified diets (gamma-irradiated, microwave-irradiated, probiotic-supplemented and carbohydrase-supplemented diets) were studied on digestive enzyme specific activities and growth performance quality of juvenile Siamese fighting fish (Betta splendens Regan, 1910) during 2. weeks of critical and intensive rearing period. The modified procedures did not change biochemical compositions and gross energy of diets, but generally resulted in relatively higher in vitro digestibilities of protein and carbohydrate and fish survival rate, albeit insignificant. Only gamma irradiation significantly increased in vitro protein digestibility of the diet, and microwave irradiation increased starch gelatinization and water solubility (P< 0.05). Fish fed microwave-treated diet showed highest values in all studied growth indicators and digestive enzyme specific activities (except lipase), with significantly higher amylase specific activity and activity ratio of amylase to trypsin (A/T ratio). Correlation analysis indicated significant relationships (P< 0.05) among the levels of total protease, amylase and trypsin, and between SGR and A/T ratio. Muscle and body compositions of juveniles fed on microwave- or gamma-irradiated diets were similar to the control, while the juveniles fed on probiotic- or carbohydrase-supplemented diets showed lower protein depositions (P< 0.05). Similar levels of RNA, RNA/Protein ratio, and Protein/Lipid ratio in body and muscle in all dietary groups fed ad libitum suggested that the improved growth performance in juvenile Siamese fighting fish fed on microwave-irradiated diet may not be only due to improved physicochemical properties of the diet but also improved fish consumption rate. © 2011 Elsevier B.V. Source

Nantawanit N.,Mahidol University | Chanchaichaovivat A.,Bansomdejchaopraya Rajabhat University | Panijpan B.,Mahidol University | Ruenwongsa P.,Mahidol University
Biological Control | Year: 2010

Pichia guilliermondii strain R13, a yeast isolated from Thai rambutan, has been shown to suppress the fungal pathogen Colletotrichum capsici in harvested chili. Its multiple modes of action include nutrient competition, tight attachment to the fungus, and hydrolytic enzyme secretion. This study investigated the ability of the P. guilliermondii strain R13 to induce resistance against C. capsici in chili fruit. The pretreatment of chili with the yeast antagonist, physically separated from the fungus by known distances, significantly reduced disease incidence and lesion diameter caused by C. capsici. Compared to the controls, the yeast treatment also significantly enhanced the activities of phenylalanine ammonia-lyase, chitinase, and β-1,3-glucanase, and the accumulation of capsidiol phytoalexin in chili tissue. Scanning electron micrographs showed that the morphology of C. capsici spores and hyphae were abnormal and that the pathogen had restricted growth on chili tissue adjacent to the yeast-inoculated sites. The results indicate that the induction of resistance may be another mechanism by which the yeast antagonist suppresses C. capsici. © 2009 Elsevier Inc. All rights reserved. Source

Srisunont C.,Bansomdejchaopraya Rajabhat University | Babel S.,Thammasat University
Marine Pollution Bulletin | Year: 2015

The nutrient uptake and release by the mussels in relation with amount of food consumption are emphasised in this research. Results of the study demonstrate that about 16% of the total mass dry weight food consumed by the mussels was released as faeces. The depositions of particulate carbon, nitrogen, and phosphorus in mussel faeces were found to be 26.3, 5.7, and 0.6mg/day/indv respectively. Soluble inorganic nutrients such as NH4 +-N (2.5mg/day/indv), and PO4 3--P (0.6mg/day/indv) were also released as mussel excretion. The nutrient absorption efficiency for the green mussel body was found to be 65.1% for carbon, 62.1% for nitrogen, and 79.2% for phosphorus. Subsequently, green mussels can remove particulate carbon, nitrogen and phosphorus at 108.1, 13.5, and 4.6mg/day/indv from aquatic systems. Finally, the results can help in estimating the carrying capacity of mussel cultivation without deteriorating the water quality in marine ecosystems. © 2015 Elsevier Ltd. Source

Kaewdoungdee N.,Bansomdejchaopraya Rajabhat University | Tanee T.,Mahasarakham University
Genetics and Molecular Research | Year: 2013

The Thailand cultivar pepper 'phrik man bangchang' (Capsicum annuum var. acuminatum, Solanaceae) was originally cultivated in the Bangchang Subdistrict, Amphawa District in Samut Songkhram Province. The cultivated areas are limited; we verified its distribution in Thailand for in situ 'phrik man bangchang' genetic resource conservation. Samples were collected from the original cultivation area of Bangchang Subdistrict (Or) and were randomly explored in Ratchaburi Province (RB), Khon Kaen Province (KK), and Sakon Nakhon Province (SN). A pure line from The Tropical Vegetable Research Center at Kasetsart University was used as the standard indicator. Two more Capsicum species, C. chinensis and C. frutescens, and a species from another genus in the family, Solanum melongena, were included. A dendrogram constructed from random amplified polymorphic DNA fingerprints indicated that the Or, RB, KK, and SN samples were C. annuum var. acuminatum with supportive similarity coefficients of 0.79 to 0.98. Finally, DNA barcodes, from psbA-trnH spacer region, were provided for the 3 wild species, C. annuum var. acuminatum, C. chinensis, and C. frutescens under GenBank accession Nos. JQ087869-JQ087871. The nucleotide variations between species were 0.23 to 0.26. In summary, 'phrik man bangchang' is still being planted in Bangchang Subdistrict, but only in small areas. The distribution of planting areas is expected to be throughout Thailand. © FUNPEC-RP. Source

Nutdanai S.,Bansomdejchaopraya Rajabhat University | Sanpanich A.,Mahidol University
BMEiCON 2014 - 7th Biomedical Engineering International Conference | Year: 2015

This research purposes to develop a medical equipment registration and spare part reserve module which is an important basic component in the WepMEt (Web application for medical equipment management in hospital) program set. This is a main assistive device for medical equipment management in a general hospital. This program is developed as a Web-base application tool which applying a decision supporting system, industrial engineering technique and experience in a real situation in a program development process. Those concepts are conformed in order obtain the program set that response to context and medical equipment management process in Thai and also concerning a hospital quality assurance. Synthesis process of main information for medical equipment registration system and spare part reserve system is performed by group criticizing of medical equipment management expertise. The program development is based on a rapid prototype technique. This program set is tested by recording of 3,512 items of medical equipment from 75 departments, 50 equipment types. The evaluation shows that our program set compatibly response to Firefox browser and able to attach electronic file into database and also able to create and print a bar-code for supporting a program operation. © 2014 IEEE. Source

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