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Preface - kmutt

Preface - kmutt

KMUTT Annual Research

KMUTT Annual Research Abstracts 2005 numerical examples are shown. The numerical solution of the problem is compared with the known solution. IC-135 A MATRIX REALIZATION OF G 2 Sarawut Saenkarun, Anatoli Loutsiouk International Conference in Mathematics and Applications (ICMA-MU 2005), December 15- 17, 2005, Chaophya Park Hotel, Bangkok, Thailand, p. 411 This study is a consideration of representations of the Lie algebra of derivations of the split Cayley algebra C which is the smallest dimensional irreducible representation of the Lie algebra G 2 - By selecting a suitable basis of C and a suitable Cartan subalgebra, the Lie algebra can be decomposed into root spaces with respect to the Cartan subalgebra of diagonal matrices, the positive root spaces being upper triangular matrices and the negative root spaces lower triangular matrices. Root system and inner product of elements in the inner product spaces generated by all roots are also investigated. IC-136 DETECTION OF TRIMETHYLAMINE USING POLYANILLINE THIN FILM AS AN OPTICAL SENSING MATERIAL Mayuree Kittidechachan, Wuttichai Pae-ngam, Nuttapat Atsanee, Weeranuch Kaewviset, Inthira Sripichai, Suppalak Angkaew The 11 th Asian Chemical Congress (11th ACC), August 24-26, 2005, Korea University, Seoul, Korea Rotten fish release a stinky smell whose main constituent is an amine compound called trimethylamine (TMA). Concentration of TMA is a key parameter in the assessment of the freshness of fishery products. To have an early detection of rottenness and quality control of fish and other frozen seafood products, sensors capable of detecting a small amount of TMA present in its package or container are needed. Optical sensors are far more preferable than conductivity-based sensors in this application due to the presence of high humidity and salty environment which can interfere greatly to the conductivity measurement. Polyaniline (PANi) is a polymer that can changes its color reversibly on exposure to acid and basic condition. The emeraldine-salt (green form) turns into the emeraldine-base (blue form) on exposure to 121 some basic environment, including in various amine vapors. Thin films of PANi-salt were used as the sensing material in optical sensor for detecting of ammonia and various types of amine vapors. In this work, thin PANi-salt films were fabricated by spin casting of the PANi-base films from NMP solution onto quartz slides and subsequently exposing the base films to 1.0 M- HCl solution for 15 minutes (to completely turn the base form into the salt form). The optical sensor testing unit consists of a red laser-diode source (λ = 670 nm), a computer-interfaced photodiode detection unit, and a home-made Teflon chamber that has a quartz-slide fixing stage and allows a controllable gas flow. To test the sensing performance, TMA vapor and mixing N 2 gas were passed in a controlled flow rate in to the Teflon chamber and the transmittance light at 670 nm were recorded as a function of exposure time and TMA concentration. The sensor characteristics of the PANi salt toward TMA vapor such as an equilibrium response time, sensitivity, recovery time and reversibility were reported. IC-137 POLYANILINE BULK AND NANOFIBER FILMS AS THE OPTICAL SENSING MATERIALS FOR DETECTION OF AMINE VAPORS Mayuree Kittidechachan, Rawin Teopipithaporn, Suppalak Angkaew The 11 th Asian Chemical Congress (11th ACC), August 24-26, 2005, Korea University, Seoul, Korea Composite films of polyaniline (PANi) bulk and PANi nanofibers in poly(vinyl alcohol), PVOH matrix were studied as the sensing material for detection of amine vapor. The PANi bulk sample was synthesized by conventional chemical oxidation reaction using ammonium peroxydisulfate as an oxidant and HCl as an acid catalyst. The PANi nanofibers were prepared by interfacial polymerization by the method reported in literature in an aqueous/chloroform solvent system. The composite films of the PANi bulk were prepared by dissolving PANi and PVOH in 1-methyl-2- pyrrolidone (NMP) and spin-cast the solution mixture into thin films. The nanofiber films were obtained by thoroughly mixing PANi nanofibers into an aqueous solution of PVOH and spin-cast into thin films. Prior to a sensing International Conference

122 test, all of the composite films were treated with HCl vapor to reset PANi into the emeraldine-salt form. Detection of four types of amine vapors (butylamine, diethylamine, N-methylamine and N-N’-dimethylamine) were performed by mean of the transmission spectroscopy. The results showed that the PANi nanofiber films have much faster response (5-10 times faster) than the PANi bulk films. IC-138 THE EFFECT OF CARBON AND NITROGEN SOURCES ON THE LIPASE PRODUCTION BY Bacillus subtilis Sangchai Kanjanchumphon, Teerapat Kitiprasert, Charat Cheunsakul, Sukon Tantipaibulvut The 1 st International Conference on Fermentation Technology for Value Added Agricultural Products, March 22-25, 2005, Sofitel Raja Orchid Hotel, Khon Kaen, Thailand Studies were carried out on lipase production by Bacillus subtilis. The bacterium was grown in Luria Broth (LB) medium containing NH4CI for 48 hr. The lipase activity was determined by the titrimetric method using olive oil as the substrate. Glucose was replaced by either vegetable oils or Tween 80 with the aim of improving enzyme production. The lipase activity profile was highest for olive oil at 0.1% (0.5-0.6 units/ml after 20 hr). However, some oils gave the peak of maximum lipase activity when the organism entered the late of logarithmic growth phase or the stationary phase. This included 1% palm oil (0.61 units/ml at 38 hr), 1% sunflower oil (0.58 units/ml at 38 hr), and 1% olive oil (0.82 units/ml at 47 hr). In addition, none of the organic nitrogen sources investigated (meat extract, soya peptone, and skim milk) was better than yeast extract and tryptone. Among the inorganic nitrogen sources used, (NH 4 ) 2 HPO 4 , (NH 4 )H 2 PO 4 , and (NH 4 ) 2 SO 4 gave the peak of maximum lipase activity (0.6- 0.8 units/ml) after 40 hr. IC-139 ANTIMICROBIAL SUBSTANCE FROM Bacillus SP. ISOLATED FROM BLACK TIGER SHRIMP Nongpanga Khunajakr, Vilanee Chunglok, Janthakorn Suebsao The International Conference on Shrimp Biotechnology: New Challenges through Thai Shrimp Industry, (BioThailand 2005), November KMUTT Annual Research Abstracts 2005 4-5, 2005, Queen Sirikit National Convention Center, Bangkok, Thailand, p. 450 Seventy-five strains of bacteria were isolated from intestinal and head content of black tiger shrimp from shrimp farms located in Tung - kru area. The identification of all isolates showed that 47 isolates belonged to the genus Bacillus. The other isolates belonged to genus Pseudomonas, Enterobacter and Staphylococcus. The antibacterial activity of all isolates was tested against marine pathogens Vibrio harveyi and Aeromonas hydrophila. Of 75 isolates examined, only 4 isolates of Bacillus sp. were able to inhibit the growth of both pathogens. Growth and production of antibacterial substance from 4 Bacillus strains were studied and compared. Bacillus sp. HJB-01 isolated from head content of shrimp could produce the highest antibacterial activity against Aeromonas hydrophila. Antimicrobial substance produced from strain HJB-01 was not inactivated by some proteolytic enzymes, lysozyme and α-amylase. This antimicrobial substance was heat stable at 100 °C for 30 min and remained active over a pH range from 5 to 9. The substance exhibited a broad spectrum antimicrobial activity against Gram -positive and Gram-negative bacteria. IC-140 USE OF IRRADIATION TO IMPROVE THE SAFETY AND QUALITY OF CHILLED PAD THAI (STIR FRY RICE NOODLE WITH DRIED SHRIMP) Athapol Noomhorm, Kanittha Pungsawat, Porntip Sirisoontaraluk, Punchira Vongsawasdi International Symposium on New Frontiers for Irradiated Food and Non-Food Products, September 22-23, 2005, Miracle Grand Hotel, Bangkok, Thailand Pad Thai, which is stir fried rice noodle with dried shrimp, was subjected to gamma irradiation. Two components (cooked rice noodle and spicy sauce with dried shrimp) were separately packed and inoculated with Lisleria monocytogenes and Escherichia coli. D 10 values of both pathogens were lower when pathogens were contaminated in cooked rice noodle. No survivors of both contaminated pathogens during 4 weeks of chilled storage when dose of 4 kGy was applied in the two components. After irradiation, texture of cooked rice noodle was softer and its color changed from white to yellow whereas redness of spicy sauce and dried 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

  • Page 77 and 78: 70 ของการดูดซ
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    National Conferences

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    210 จอมเทียนปา

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    212 การสกัดสาร

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    214 ไดแก อุณหภู

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    216 โดยกลไกของ

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    218 เคลือบเมื่

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    220 สําเริง จัก

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    222 ลดเวลาตลอด

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    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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