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Preface - kmutt

Preface - kmutt

KMUTT Annual Research

KMUTT Annual Research Abstracts 2005 fermentation medium to evaluate the kinetic behavior of an ethanol producing yeast Saccharomyces cerevisiae yeast (5019) during the bioconversion of glucose into ethanol. Assays were conducted with non-detoxified (raw) hydrolysates and semi-synthetic medium in agitated flasks. The results showed that in the hydrolysates the glucose-to-ethanol bioconversion was as effective as in synthetic medium. Dilute acid agricultural waste hydrolysate, comprised mainly of glucose, was obtained from ground cassava peel after dilute sulfuric acid (0.1M) hydrolysis at 135°C for 30 min. Neutralized hydrolysates containing reducing sugars and glucose ca 66.74 g/100g and 37.09 g/100g cassava peels, respectively, were used as the substrate for ethanol production. Glucose was consumed within 18 h with specific ethanol productivity of 0.33 g/l.h and ethanol weight yield of 0.43 g/g glucose utilized. Cassava peels hydrolysate contaning reducing sugars (18.42 g/l) and glucose (10.24 g/l) was consumed within 18 h with a specific ethanol productivity of 0.29 g/l.h and ethanol weight yield of 0.41 g/g glucose utilized. In contrast, the neutralized cassava waste hydrolysate obtained to be fermented by yeasts, the specific productivity and weight yield of ethanol from the hydrolysate were comparable to those from glucose sample. The hydrolysate was a good substrate for ethanol production. IC-285 HYDROLYSIS OF AGRICULTURAL RESIDUES AND KRAFT PULPS BY XYLANOLYTIC ENZYMES FROM ALKALIPHILIC Bacillus SP. STRAIN BK Kusuma Kaewintajuk, Jirasak Kongkiattikajorn, Khanok Ratanakhanokchai, Khin Lay Kyu The 1 st International Conference on Fermentation Technology for Value added Agricultural Products, March 22-25, 2005, Sofitel Raja Orchid Hotel, Khon Kaen, Thailand When grown in an alkaline xylan (oat spelt) medium, an alkaliphilic bacterium, Bacillus sp. strain BK produced extracellular cellulase-free xylanolytic enzymes which had xylan-binding ability. The xylanolytic enzymes consisted of xylanase, arabinofuranosidase, acetyl esterase and ß-xylosidase with the specific activities at 1.23, 0.11, 0.06 and 0.04 unit per mg of protein, respectively. The hydrolysis of agricultural residues and kraft pulps by the xylanolytic enzymes was studied at 175 50 °C and pH 7.0. The hydrolysis rate of xylan in corn hull was higher than those of sugarcane bagasse, rice straw, corn cop, rice husk and rice bran. Alternatively, the hydrolysis rate of xylan in sugarcane pulp was 2.01 and 3.52 folds higher than those of eucalyptus and pine pulps, respectively. This enzyme can be used in hydrolysis of xylan in agricultural residues and in kraft pulps. IC-286 STUDY OF FREE AMINO ACID AND AMINE CONTENTS OF THAI FERMENTED SAUSAGES DURING FERMENTATION Sasithorn Limsuwan, Wonnop Visessanguan, Jirasak Kongkiattikajorn The 1 st International Conference on Fermentation Technology for Value added Agricultural Products, March 22-25, 2005, Sofitel Raja Orchid Hotel, Khon Kaen, Thailand The role of the starter culture and endogenous enzymes on the free amino acid and amine contents of a typical Thai fermentedripened pork sausage widely consumed in Thailand was studied. Three batches of sausages were prepared. The control batch was manufactured with aseptic ingredients without microbial inoculation. The other two batches were manufactured with aseptic ingredients inoculated with Lactobacillus sake or Lactobacillus sake and Debaryomyces hansenii. Their effects on pH, free amino acid and amine contents were studied. Sausages inoculated only with Lactobacillus sake or with this starter combined with Debaryomyces hansenii had the lowest pH as a result of carbohydrate fermentation. In all batches similar patterns were observed for free amino acids which indicate that the endogenous proteases play an important role in proteolytic behavior. Changes were observed in the amine fraction, indicating that the strains used as starter cultures show decreasing in amino acid decarboxylase activity. Total level of biogenic amines in samples ranged from 215.32 to 347.16, 239.75 to 301.42 and 267.45 to 342.43 mg kg for control Nham, Nham with Lactobacillus sake and Nham with Lactobacillus sake, and Debaryomyces hansenii, respectively. Nham sampled for analysis during fermenting showed the presence of cadavarine increase from 139.98 to 235.69 and tyramine increased from 75.34 to 138.47 for control Nham while Nham with the starters contained these amines lower than the control Nham International Conference

176 during 5 days of fermentation. It is suggested that the control of biogenic is important tool to establish the better condition of preservation of Nham during their shelf-life. IC-287 QUALITY ATTRIBUTES OF FIVE MYANMAR RICE CULTIVARS Khin Thida One, Nutta Laohakunjit, Khin Lay Kyu, Sirichai Kanlayanarat APEC Symposium on Assuring Quality and Safety of Fresh Produce, August 1-3, 2005, Radisson Hotel, Bangkok, Thailand The quality of rice depends in great measures on its variety and the length of time it is kept in storage. This investigation was carried out to compare the quality parameters of five rice varieties in a milled form at market level. The most popular five cultivars of Myanmar rice were collected from local retail market. Six month-aged milled rice samples were with moisture contents in a range of 10.62 to 12.72%. Three aromatic rice cultivars (Paw-san-hmwe, Taung-pyan-hmwe and Nga-kywe) were belonged to short grain type while the other two non-aromatic rice cultivars (Manaw-thuka and Ayar-min) were included in medium grain class. The physico-chemical characteristics, cooking and eating qualities were measured and wide varietal differences were observed. There was little variation in moisture content, amylose content and alkali spreading value, but there were marked differences in grain elongation ratio, gel consistency, activity of a-amylase and lipase enzyme and the concentration of rice major aromatic volatile compound, 2-acetyl-lpyrroline (AcPy). One variety (Paw-san-hmwe) had a higher content of AcPy than the others while that compound was not detected in any non-aromatic rice. On the whole, the quality of Paw-san-hmwe was found to be superior to the other four varieties of rice. IC-288 PLANT CELL WALL DEGRADING ENZYMES FROM Bacillus SP. Khanok Ratanakhanokchai, Patthra Pason, Khin Lay Kyu The JSPS Bangkok Symposium : New Waves in Microbial Biotechnology for the Tropics, March 8-10, 2005, The Nai Lert Park Bangkok, Thailand, pp. 8-9 Many cellulolytic microorganisms and KMUTT Annual Research Abstracts 2005 their cellulase systems have been studied extensively for degradation of naturally abundant insoluble polysaccharides in plant cell wall to valuable products such as fermentable sugars, chemicals and liquid fuel. Efficient enzymatic degradation of insoluble polysaccharides requires a tight interaction between the enzymes and their substrates and the cooperation of multiple enzymes to enhance the hydrolysis due to the complex structure. Cellulases and xylanases that contained cellulose-binding domains (CBD) and/or xylanbinding domains (XBD) are associated into high molecular weight multienzyme complex, cellulosome, have been found in many anaerobic cellulolytic microorganisms and multienzyme complex, xylanosome was found in only one anaerobic bacterium. The most intensively studied multienzyme complex is the cellulosome produced by anaerobic thermophilic Clostridium thermocellum. The cellulosome in C. thermocellum comprises numerous subunits such as different types of glycosyl hydrolases, which packed into polycellulosomal protuberance-like organelles on the cell surface and serve to promote their synergistic action. Thus, the arrangement of cell wall degrading enzymes into a multienzyme complex has advantages over free enzyme systems. These cellulosomes are dedicated to hydrolyze insoluble polysaccharides in plant cell walls because of their ability to bind to insoluble cellulose and/or xylan via CBDs and XBDs respectively. However, it has been reported that aerobic bacteria produced different cellulolytic enzymes, which exhibited separately. Therefore, we searched for multienzyme complex producing bacteria under aerobic cultivation to improve the degradation of insoluble polysaccharides in plant cell walls. This study is necessary to expand the knowledge concerning the diversity of cellulosome systems in nature. The selection criteria for cellulolytic and xylanolytic multienzyme complex producing aerobic bacterium were: the production of high cellulase and xylanase enzyme activities, the presence of CBD and /or XBD in enzymes to bind to insoluble substances, the adhesion of bacterial cells to insoluble substances and production of multiple cellulases and xylanases in a form of high molecular weight complex. We are interested to undertake a study on the multienzyme complex from the xylanolytic, cellulolytic bacterium under an aerobic condition to improve the degradation of International Conference

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    CONTENTS Page Preface International

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    National Journals

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    54 นอยกวาแบบต

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    56 (Least Square Matching Method)

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    58 อุณหภูมิ 30 แ

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    60 สเปกตรัม จา

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    62 ขอมูลดานทร

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    64 22.8 มาตรฐานเป

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    66 2545 NJ-033 EFFECTS OF ELEVATED

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    68 เปลือกที่ม

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    70 ของการดูดซ

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    72 การสกัดดวย

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    74 collection of authentic texts th

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    76 รอยละ 32 มีสา

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  • Page 217 and 218: 210 จอมเทียนปา
  • Page 219 and 220: 212 การสกัดสาร
  • Page 221 and 222: 214 ไดแก อุณหภู
  • Page 223 and 224: 216 โดยกลไกของ
  • Page 225 and 226: 218 เคลือบเมื่
  • Page 227 and 228: 220 สําเริง จัก
  • Page 229 and 230: 222 ลดเวลาตลอด
  • Page 231 and 232: 224 อุณหภูมิสู
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    226 NC-043 การวิเคร

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    228 เกิดพฤติกร

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    230 เดียว เพื่อ

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    232 มากนอยเพีย

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    234 หลักที่พบใ

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    236 NC-073 การออกแบ

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    238 บทความนี้น

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    240 นําเอาเวคเ

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    242 งานวิจัยนี

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    244 การอบแหงลด

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    246 แยกเฟสต่ํา

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    248 กลบ โดยเปรี

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    250 นํามาใช คือ

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    252 วิเคราะหหา

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    254 NC-123 การวิเคร

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    256 NC-129 เครื่องผ

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    258 สามารถขยาย

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    260 ครั้งที่ 43, 1-

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    262 calculated with the use of the

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    264 Version 1.3.1 และ Softwar

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    266 ขนไกได จากก

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    268 โครงสรางขอ

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    270 การปลูกพืช

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    272 ระดับพึงพอ

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    274 ของแกสโซฮอ

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    276 1) สภาพทั่วไ

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    278 อนุปริญญา แ

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    280 อาชีวศึกษา

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    282 กระทบตอคุณ

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    284 ตั้งกลไกแข

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    286 นุชจรินทร เ

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    288 โดยรวมผูบร

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    290 แนนกระแสไฟ

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    292 NC-222 ผลงานตีพ

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    294 NC-227 เตาเผาไห

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    296 จําเพาะรวม

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    298 NC-238 จลนพลศาส

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    300 ทนงเกียรติ

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    302 ดีเซลนั้นม

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    304 NC-254 การใชเทค

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    306 อาคารศูนยก

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    308 กระบวนการร

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    310 บรรยากาศขอ

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    312 metal ions on 2-AP biosyntheis

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    314 total clones while the ethanol

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    316 การประชุมท

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    318 BioThailand (The 16 th Annual M

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    320 สูงที่สุดพ

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    322 นัยสําคัญท

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    324 ความเขมขนร

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    326 ปลูกแบบพรา

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    328 นี้ทําใหทร

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    330 ดุลชาติ มาน

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    332 ไมโครเมตร ส

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    334 In this study, we collected seq

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    336 กนกรัตน นาค

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    338 การพัฒนาสื

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    340 one of the causes of difficulty

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    342 ทวีรัตน วิจ

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    344 program, Cytoscape. This model

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    346 production demand. Nevertheless

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    348 อุลตราไวโอ

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    350 นี้อยูในชว

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    352 เพื่อนําสว

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    354 trichloroacetic acid (TCA) ม

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    356 ทรัพยากรที

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    358 ในประเทศสห

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    360 8-9 ธันวาคม 2548,

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    362 ซึ่งเกิดขอ

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    364 NC-391 การวิเคร

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    366 การประชุมว

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    368 2547) พบวามหาว

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    370 กนกพร ลีลาเ

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    Authors Index

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    376 จงจิตร หิรั

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    378 ธ ธนธร ทองส

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    380 พยุงศักดิ์

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    382 วรรณพ วิเศษ

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    384 สุดารัตน จิ

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    386 อุลาวัณย กุ

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    388 138, 141, 142 Jarunya Narangaja

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    390 Panida Kongsawadworakul 191 Pan

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    392 Sorakrich Maneewan 124, 136 Sor

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    394 KMUTT Annual Research Abstracts

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