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Search Results: 1 - 10 of 26 matches for " Amornrat Apinunmahakul "
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Strategic Interaction and Charitable Fundraising  [PDF]
Amornrat Amornrat Apinunmahakul, Vicky Barham
Modern Economy (ME) , 2012, DOI: 10.4236/me.2012.33044
Abstract: This paper studies strategic interaction between rival charities providing multiple public goods, highlighting the role of fundraising campaigns in influencing donor decision-making. The analysis suggests that, even when charities honor donor designation, social welfare may be higher in equilibrium when charities solicit donors sequentially, rather than simultaneously or through a United Fund.
Two-Part Tariff Lottery: A Means to Provide Public Good at the Social Optimum  [PDF]
Amornrat Apinunmahakul, Vicky Barham
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.21006
Abstract: Pure public goods provided by charitable organizations may be provided at the first-best level when the provision is financed by an appropriately designed lottery. If lottery tickets are sold using a two-part tariff, the level of provision of the public good is greater than when fees are not charged to participate in the lottery. Unlike [13] who asymptotically approach the first-best level of provision with an arbitrarily large prize, a Pareto efficient level of the public good is produced when participation fees for the lottery are set appropriately.
Financial and Social Capitals of Elderly People in Thailand
Amornrat Apinunmahakul
Asian Social Science , 2012, DOI: 10.5539/ass.v8n15p147
Abstract: The number of ageing population in Thailand has been increased rapidly. The country was ranked as the most aged economy in South-east Asia after Singapore. However, there exists a body of research that associates social connectedness with good health. It hence is the objective of this study to examine of whether the correlation holds for Thai elderly. Using the first round pilot survey on Health, Ageing and Retirement in Thailand (HART), the study found that being married and, the level of education of the respondent contribute positively significantly to the probability of reporting good physical and mental health. The more the elderly participate in social activities, the higher the probability of reporting good or very good health, in particular, the mental health. Social participations to good physical health is an income equivalence of a 5 percent increase in an individual non-labor income, whilst social participations to good mental health accounts to almost 14 percent increase in the total asset value. Participating in voluntary associations thus reduces heath inequalities among older people. The research findings hence advocate for the social involvement of elderly people as a part of the quality ageing policy and the community-based welfare policy.
Molecular cloning and expression of EgTCTP, encoding a calcium binding protein, enhances the growth of callus in oil palm (Elaeis guineensis, Jacq)
Alisa Nakkaew,Wilaiwan Chotigeat,Amornrat Phongdara
Songklanakarin Journal of Science and Technology , 2010,
Abstract: The translationally controlled tumor protein (TCTP) has now been identified in evolutionarily diverse organisms and isthought to play an important role in cell growth and cell division. We have identified an EgTCTP gene from Elaeis guineensisJacq. It is a putative protein of 168 amino acids with a calculated molecular mass of 19.2 kDa. EgTCTP has a high homology(84% - 91% identity) at the amino acid level to other plant TCTPs from Hevea brasiliensis, Arachis hypogaea and Glycinemax. The recombinant EgTCTP protein is a calcium binding protein. Transgenic embryonic calli overexpressing EgTCTP havea faster growth rate than non-transformed and empty vector transformed calli. The results show that the enhancement ofEgTCTP gene expression in oil palm embryogenic calli may result in faster multiplication of the embryogenic calli. EgTCTPacts as another Ca2+-modulated protein that is involved in the cell cycle progression.
CDNA library from the Latex of Hevea brasiliensis
Wilaiwan Chotigeat,Sarapee Duangchu,Amornrat Phongdara
Songklanakarin Journal of Science and Technology , 2010,
Abstract: Latex from Hevea brasiliensis contains 30-50% (w/w) of natural rubber (cis-1,4-polyisoprene), the important rawmaterial for many rubber industries. We have constructed a cDNA library from the latex of H. brasiliensis to investigate theexpressed genes and molecular events in the latex. We analyzed 412 expressed sequence tags (ESTs). More than 90% of theEST clones showed homology to previously described sequences in public databases. Functional classification of the ESTsshowed that the largest category were proteins of unknown function (30.1%), 11.4% of ESTs encoded for rubber synthesisrelatedproteins (RS) and 8.5% for defense or stress related proteins (DS). Those with no significant homology to knownsequences (NSH) accounted for 8.7%, primary metabolism (PM) and gene expression and RNA metabolism were 7.8% and6.6%, respectively. Other categories included, protein synthesis-related proteins (6.6%), chromatin and DNA metabolism(CDM 3.9%), energy metabolism (EM 3.4%), cellular transport (CT 3.2%), cell structure (CS 3.2%), signal transduction (ST2.2%), secondary metabolism (SM 1.7%), protein fate (PF 2.2%), and reproductive proteins (RP 0.7%).
The Effect of Chitosan on Organogenesis of Oil Palm Embryo-Derived Callus
Notulae Botanicae Horti Agrobotanici Cluj-Napoca , 2010,
Abstract: Zygotic embryos of oil palm (Elaeis guineensis Jacq. var. tenera) were excised and cultured on MS medium containing 3 mg/l 2, 4-D either with or without 0.05% activated charcoal (AC). Improved growth of embryos was obtained on MS medium supplemented with 0.05% AC. Callus cultures were initiated from embryos, young leaves and roots on MS medium containing 2, 4-D, NAA and 0.05% AC. On these media, two morphologically distinct types of white and yellow compact calluses were produced. Green shoots regenerated after several transfers of the yellow compact calluses from zygotic embryos to MS medium supplemented with 15 mg/l chitosan either with or without 5 mg/l 2, 4-D. Histological sectioning revealed that regenerated shoots originated from a clump of meristematic cells that had dense cytoplasm. Regenerated shoots rooted when transferred to MS medium in the presence of 0.05% AC. Transfer of plantlets to soil was achieved. Callus from young seedling leaves and roots did not regenerate shoots or roots in medium containing 2, 4-D or TDZ, with or without chitosan. This finding shows that chitosan can initiate organogenesis in oil palm callus.
Work-Related Respiratory Symptoms Among Cotton-Fabric Sewing Workers
Pitchaya Phakthongsuk, Pasuree Sangsupawanich, Amornrat Musigsan, Greetha Thammakumpee
International Journal of Occupational Medicine and Environmental Health , 2007, DOI: 10.2478/v10001-007-0011-7
Abstract: Objectives: An inspection of the sewing unit in a 700-bed hospital revealed that workers employed in this unit complained of cough, shortness of breath, and tightness in the chest. The aim of this cross-sectional study was to assess the prevalence of respiratory symptoms in the sewing workers and dust concentration in the workplace. The obtained results were compared with the control group. Materials and Methods: The sewing workers (n = 22, including 19 current and 3 former employees) and 22 housekeepers as controls were included in the study. All the participants responded to the respiratory questionnaire and underwent spirometric measurements, skin prick test, chest X-ray, and methacholine inhalation test. Environmental dust was measured using both an air pump and a vertical elutriator. Results: The sewing workers reported more symptoms of phlegm, chest tightness and eye irritation than persons of the control group. Neither clinical investigations nor respiratory disorders under study provided evidence for a significant difference between the sewing workers and the control group. Of the 22 subjects, 2 (9.1%) showed occupational asthma and 4 (18.2%) mucous membrane irritation and organic dust toxic symptoms. The total and respiratory dust was within normal limits, but the dust concentration measured by the elutriator was above the limit value of 0.34 ± 0.09 mg/m. After ventilation improvements, the dust level decreased to 0.19 ± 0.06 mg/m. Conclusions: This study indicated that respiratory and ocular disorders were related to organic dust produced during the sewing process of cotton fabric.
Anti-tumour activities of fucoidan from the aquatic plant Utricularia aurea lour
Dararad Choosawad,Ureporn Leggat,Chavaboon Dechsukhum,Amornrat Phongdara
Songklanakarin Journal of Science and Technology , 2005,
Abstract: Fucoidan, a sulfated polysaccharide with several biological activities, is usually isolated from marine seaweeds or from echinoderms. Here, we report on the anti-tumour activity of fucoidan isolated from the aquatic plant Utricularia aurea Lour (Lentibulariaceae). A crude extract (CE) prepared by incubating U.aurea with hot water at 95oC for 12 hr was partially purified by Sephadex G-50, eluting with a 50mM sodium acetate buffer, at pH 5.0, containing 0.5M NaCl. Partially purified fucoidan (PPF) had a 3- fold increase in fucose content when compared with the CE and a molecular weig t of 11.6 kDa as determined by Sephadex G-200. Chemical analysis showed that CE consisted of 62.5% glucuronic acid, 5.0% fucose, 1.7% sulfate and 12.0% proteins while PPF consisted of 65.0% glucuronic acid, 15.3% fucose, 2.1 % sulfate and 8.3% proteins.The anti-tumour activity of the CE and PPF was determined by the MTT test. The CE at 125 μg/mL fucoidan and PPF at 250 μg/mL inhibited the growth of KB cells (a nasopharynx tumour cell line), but did not inhibit that of normal fibroblast cells. The inhibition was postulated to occur via apoptosis as significantlymore apoptotic cells were found after treatment than in the untreated KB cells (P<0.05) by the TUNNEL (TdT-mediated dUTP Nick-End Labelling) assay.
Phylogeography of Ivory shell (Babylonia areolata) in the Gulf of Thailand revealed by COI gene structure and differentiation of shell color by ITS1 DNA
Watcharasuda Hualkasin,Wipavee Tongchuai,Wilaiwan Chotigeat,Amornrat Phongdara
Songklanakarin Journal of Science and Technology , 2008,
Abstract: Babylonia areolata is an aquatic mollusk in the genus of the gastropod family Buccinidae. Genetic variations were observed in the 542 base pairs of the sequences from its cytochrome oxidase subunit I (COI) gene of mtDNA. COI alignments showed that there were two monophyletic clades on the phylogenetic tree, referred as B. areolata. These results point towards the possibility of B. areolata being a single species with strong phylogeographic subdivisions. About 520 base pairs of the internal transcribed spacer 1 (ITS1) sequence were able to distinguish between the shell colors (brown, cream and white) of B. areolata.
Effect of hemoglobin powder substituted for fishmeal on growth performance, protein digestibility, and trypsin gene expression in Litopenaeus vannamei
Duangrat Chookird,Chutima Tantikitti,Amornrat Pongdara,Manee Srichanun
Songklanakarin Journal of Science and Technology , 2010,
Abstract: Recent increases in the price and demand of fishmeal, the primary protein source in shrimp feeds, have caused asearch for alternative protein sources. Hemoglobin powder (HE) is a by-product produced by separating hemoglobin fromplasma of farm animal un-coagulant blood. HE contains high protein content but low lipid content, and thus has highpotential for fishmeal substitution.A six week feeding trial was carried out to investigate effects of HE substituted for fishmeal protein on growth performance,protein digestibility and trypsin gene expression in Pacific white shrimp (Litopenaeus vannamei). Six diets with0%, 12.5%, 25%, 50%, 75% and 100% of HE replacing fishmeal protein were fed four times daily to six groups of shrimp withan average initial weight of 3.53 g/shrimp. Growth of shrimp decreased with increasing level of HE substitution. Although the12.5% HE substitution caused significantly lower final weight, weight gain, SGR, feed intake, PER and PPV in comparisonwith the control diet, FCR of this diet was not statistically different (p<0.05).The activity of trypsin of shrimp was similar among the groups fed diets with HE substitution not higher than 50%(p>0.05). In-vitro and in-vivo protein digestibility of 12.5% HE substitution were significantly lower than that of the controlgroup in which the trypsin gene expression of shrimp fed 12.5% HE substituted diet was the highest.
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