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Search Results: 1 - 10 of 13 matches for " Petcharat "
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Cultivation of oyster mushroom (Pleurotus ostreatus) on oil palm residues
Petcharat, V.,Tongwised, A.
Songklanakarin Journal of Science and Technology , 2001,
Abstract: This study is aimed to use oil palm residues to cultivate the oyster mushroom, Pleurotus ostreatus, which is one of the most important mushrooms cultivated worldwide. Spawn was prepared on sorghum seeds and inoculated on substrate in plastic bags. Oil palm fronds were cut and used to grow Pleurotus ostreatus. The first fructification occurred 20 days after waterring. The biological efficiency reached at 28.6%. When sawdust of para rubber logs was added to the cut oil palm fronds at the rate of 1:1 (vol : vol.), the biological efficiency reached at 39.3%.Supplementary material at the rate of 5% was also added into the combination of cut oil palm frond and sawdust. The result showed that rice bran, corn meal or oil palm-kernel meal give yields between 142.2-165.0 g/bag (B.E. = 42.8-49.6), which were not statistically different. Oil palm pericarp waste was also used as main substrate for P. ostreatus cultivation. The average yield obtained during 40 days havesting period was 112.6 g/bag (B.E. = 64.3%). Addition of sawdust or rice bran into pericarp waste decreased the yield of the basidiocarps. Palm-kernel meal at the rate of 5-20% was used as a supplement material. Addition of 20% palmkernel meal into sawdust supported higher yield. The biological efficiency reached 55.8%. From the above results, four formulae of the substrate were prepared. Treatment of oil palm pericarp waste + 3% rice bran + 3% corn meal + 0.75% Ca(OH2) supported higher yield of the basidiocarps. The average yield obtained from 950 g of substrate was 190.2 g during 60 days havesting (B.E. = 57.2%). Using 6% palm-kernel substitute 3% rice bran + 3% corn meal supported the same yield (B.E. = 56.2%) Using sawdust as the main substrate, the yield achieved was less than that obtained with oil palm pericarp waste. The average yield from treatment of sawdust + 3% rice bran + 3% corn meal + 0.75% Ca (OH2) was 154.0 g/bag (B.E. = 46.3%) while treatment of sawdust + 6% palm-kernel meal + 0.75% Ca (OH2) was 153.2 g/bag. (B.E. = 46.1%) From the above results it is suggested that oil palm residues can be used as an alternative substrate for P. ostreatus production.
Effect of oil palm kernel meal on yield of Hed Hu Hnu (Auricularia polytricha (Mont.) Sacc.) and Hed Khon Khao (Lentinus squarrosulus Mont.)
Petcharat, V.,Tongwised, A.
Songklanakarin Journal of Science and Technology , 2003,
Abstract: Hed Hu Hnu (Auricularia polytricha) and Hed Khon Khao (Lentinus squarrosulus) were cultivated on pararubber sawdust supplemented with oil palm kernel meal at different concentrations. Number of days for full colonization of the mycelia, number of days from expossure to 1st cropping time, and yield on oil palm kernel meal were compared to those supplemented with 5% rice bran. Depending on the results it was suggested that 5% and 15% of oil palm kernel meal was suitable for Hed Hu Hnu and Hed Khon Khao, respectively. Yield of A. polytricha on 950 g of sawdust + 5% oil palm kernel meal + 1% Ca(OH)2 was 380.58 g/bag (B.E. = 114.5%), during 90 days of harvesting time. L. squarrosulus needs more than 5% of oil palm kernel meal to support the higher yield. Cultivation of L. squarrosulus on 950 g of sawdust + 15% oil palm kernel meal + 1% Ca(OH)2 yielded 123.72 g/bag of basidiocarps (B.E = 37.2%), during 60 days of harvesting time.
Use of oil palm kernel meal as a supplement material for abalone mushroom (Pleurotus cystidiosus O.K. Miller) cultivation
Petcharat, V. and,Tongwised, A.
Songklanakarin Journal of Science and Technology , 2004,
Abstract: The objective of this study was to determine the optimum rate of oil palm kernel meal, for an abalone mushroom (Pleurotus cystidiosus) cultivation. Different concentrations of oil palm kernel meal (5- 20%) were added to pararubber sawdust and used to grow the abalone mushroom in plastic bags. Growth rate of the mycelia, number of days from watering to harvesting and yield were compared to those on 94% sawdust + 5% rice bran + 1% Ca(OH)2. The results showed that 10% oil palm kernel meal was the optimum concentration for abalone mushroom cultivation. Yield on 950 g/bag of 89% sawdust + 10% oil palm kernel meal + 1% Ca(OH)2 was 202.12 g/bag (B.E. = 60.79%) during 120 days of havesting time. Addition of higher concentration of oil palm kernel meal (15-20%) did not increase yield of the basidiocarps.
A Constant on a Uniform Bound of a Combinatorial Central Limit Theorem
Kritsana Neammanee,Petcharat Rattanawong
Journal of Mathematics Research , 2009, DOI: 10.5539/jmr.v1n2p91
Abstract: Let n be a positive integer and Y(i, j), i, j = 1, ..., n, be random variables with finite fourth moments. Let ? be a random permutation on {1, ..., n} which independent of Y(i, j)’s. In this paper, we use Stein’s method and the technique from (Laipaporn, K., 2008) to give a uniform bound in a combinatorial central limit theorem of W = n *i=1 Y(i, ?(i)). For a sufficient large n, we yield the rate 27.72 ?n . This constant is better than the result in (Neammanee, K., 2005). Keywords: Uniform bound, Combinatorial central limit theorem, Stein’s method, Random permutation
Non-uniform Bound on Normal Approximation of Latin Hypercube Sampling
Kritsana Neammanee,Petcharat Rattanawong
Journal of Mathematics Research , 2009, DOI: 10.5539/jmr.v1n2p28
Abstract: Latin hypercube sampling(LHS)(McKay, M.D., 1979) is a method of sampling that can be used to estimate the value of multidimensional integration. Loh(Loh, W.L., 1996b) and Neammanee and Rattanawong(Neammanee, K., 2009) gave a uniform bound in normal approximation for LHS. In this paper, we give a non-uniform bound of this approximation by using Stein’s method.
Some morphological and physiological aspects and cultivation of Coprinus comatus (O. F. Mull.) Gray
Chaiyama, V,Petcharat, V.,Kritsaneepaiboon, P.
Songklanakarin Journal of Science and Technology , 2007,
Abstract: Some morphological and physiological aspects and cultivation of Coprinus comatus (O.F. Mull.) Gray were investigated. Malt extract agar turned out to be the best in supporting the mycelial growth of C.comatus. Mannose and maltose were the best carbon sources in supporting mycelial growth. C. comatus utilized peptone and NH4NO3 better than other nitrogen sources. The optimum temperature and pH on maltextract agar were 25oC and 6, respectively. Light retarded mycelial growth of C. comatus. For cultivation, the method of growing mushroom in autoclavable plastic bags was applied. Three different combinations of agricultural products were used for growing C. comatus. The combination ofpararubber sawdust : kapok waste : boiled sorghum seeds (3:3:1 by volume) supported higher yields of basidiocarps. Time required for full colonization of the mycelia on 500 gm substrate at room temperature(28-30oC) was 20.3 days. After casing with the mixed soil (loam soil : rice husk : cow manure, 2:2:1) the cultivating bags were incubated in the growth chamber at 20oC and 65% relative humidity. Fructificationbegan after 20.6 days of watering, and the average yield obtained was 165.6 g/bag.
Pharmacist perceptions of new competency standards
Maitreemit,Pagamas; Pongcharoensuk,Petcharat; Kapol,Nattiya; Armstrong,Edward P.;
Pharmacy Practice (Internet) , 2008, DOI: 10.4321/S1886-36552008000300001
Abstract: objective: to suggest revisions to the thai pharmacy competency standards and determine the perceptions of thai pharmacy practitioners and faculty about the proposed pharmacy competency standards. methods: the current competency standards were revised by brainstormingsession with nine thai pharmacy experts according to their perceptions of society?s pharmacy needs. the revised standards were proposed and validated by 574 pharmacy practitioners and faculty members by using a written questionnaire. the respondents were classified based on their practice setting. results: the revision of pharmacy competency standard proposed the integration and addition to current competencies. of 830 distributed questionnaires, 574 completed questionnaires were received (69.2% response rate). the proposed new competency standards contained 7 domains and 46 competencies. the majority of the respondents were supportive of all 46 proposed competencies. the highest ranked domain was domain 1 (practice pharmacy within laws, professional standards, and ethics). the second and third highest expectations of pharmacy graduates were domain 4 (provide pharmaceutical care) and domain 3 (communicate and disseminate knowledge effectively). conclusion: the expectation for pharmacy graduates? competencies were high and respondents encouraged additional growth in multidisciplinary efforts to improve patient care.
Larval parasitoids of agromyzid leaf miner genus Liriomyza in the southern Thailand : species and their host plants
Jiraporn Petcharat,Zeng Ling,Zhang Weiqiu,Xu Zaifu
Songklanakarin Journal of Science and Technology , 2002,
Abstract: Larval parasitoids of the leaf miner genus Liriomyza were studied in six provinces of southern Thailand, Songkhla, Phatthalung, Nakhon Si Thammarat, Trang, Satun and Pattani, from April 2000- March 2001. Two families of hymenopteran parasitoids, Eulophidae and Braconidae, were found. The eulophid included Asecodes sp. nr. notandus (Sivestri), Cirrospilus ambiguus Hanssan & LaSalle, Hemiptarsenus variconis (Girault), Neochrysocharis formosa (Westwood) and Quadrastichus sp. nr. liriomyzae Hanssan & LaSalle. There was only one braconid species, Opius dissitus (Muesebeck). Among these, A. sp. nr. notandus was found in highest frequency while H. variconis had the widest range of host plants. The parasitoids were found on 14 host plant species. Vigna sesquipedalis was able to be used by all six species of parasitoids. It was also the host plant most often used by the parasitoids in this study.
Some Boletes of Thailand
Seehanan, S.,Petcharat, V.,Te-chato, S.
Songklanakarin Journal of Science and Technology , 2007,
Abstract: The objective of this study was to collect and identify some Boletes of Thailand. Through periodical excursions in woodland area in the north, northeast and south of Thailand, and regular visits to markets inthe areas during 1995-2005, 20 species of Boletes were collected and identified. These were Boletellus ananas (M.A.Curtis) Murrill, Boletellus emodensis (Berk.) Singer, Boletellus sp. 1, Boletellus sp. 2, Boletellus sp. 3,Boletinus sp., Boletus griseipurpureus Corner, Boletus bicolor Peck, Boletus nanus (Massee.) Singer, Boletus sp. 1, Boletus sp. 2, Boletus sp. 3, Heimiella retispora (Pat. & C.F. Baker) Boedijn, Phlebopus colossus (R.Heim) Singer, Phylloporus pelletieri (Lev.) Quel., Pulveroboletus ravenelii (Berk. & M.A.Curtis) Murrill, Pulveroboletus sp., Strobilomyces confusus Singer, Strobilomyces floccopus (Vahl) P. Karst., and Tylopilusalbo - ater (Schwein) Murrill.
Screening of antagonistic bacteria against the green mold disease (Trichoderma harzianum Rifai) of Grey Oyster Mushroom (Pleurotus pulmonarius (Fr.) Quel.)
Maneechai, P.,Petcharat, V.,Chuenchit, S.,Nualsri, C.
Songklanakarin Journal of Science and Technology , 2005,
Abstract: A total of 174 strains of bacteria antagonistic against the green mold (Trichoderma harzianum), isolated from cultivating bags and fruiting bodies of the mushrooms, were screened for effects on mushroom mycelia and ability to control the green mold disease. Twenty-eight of them promoted the primodia formation of the Pleurotus pulmonarius mycelia on agar plates. Twenty-two isolates were selected and further tested in a mushroom house. Cell suspension of each isolate was prepared and sprayed onto the spawn surface of P. pulmonarius. Fifteen isolates shortened the times required from watering to 2nd and 3rd flushing and increased yield of the basidiocarps by 1.1-34.3% over 30 days. Six isolates of bacteria which showed an inhibitory effect against T. harzianum, enhanced primordia formation and increased yield of P. pulmonarius were selected and used for control testing in a cultivation house. The suspension of each isolate was sprayed onto the spawn surface immediately after exposure to the air in the mushroom house, followed by spore suspension of T. harzianum two days later. The number of infected bags was counted at 30 days after inoculation and the cumulative yield was compared after 60 days. The results showed that bacteria isolate B012-022 was highly effective in suppressing the green mold disease.Only 6.7% of the cultivating bags were found to be infected by T. harzianum when bacteria isolate B012-022 was applied. Cumulative yield obtained from 900 g of 94% sawdust + 5% rice bran + 1% Ca(OH)2 was 300.0 g/bag after 60 days, 71.1% higher than the bags infected by the green mold and without bacterial spraying. Identification of the six bacterial isolates showed all to be Bacillus spp.
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