Search Result of "M. C. BAKER"

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ผลงานตีพิมพ์ในวารสารวิชาการ

Characterization of New Baker’s Yeast Strains And Their Leavening Ability in Bread Dough

ผู้แต่ง:ImgMrs.Chakamas Wongkhalaung, ImgMrs.Malai Muangnoi,

วารสาร:

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การประชุมวิชาการ

Utilization of a microbubble dispersion to increase oxygen transfer in pilot-scale baker' s yeast fermentation unit

ผู้แต่ง:ImgDr.Pramuk Parakulsuksatid, Associate Professor,

การประชุมวิชาการ:

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Characterization of New Baker’s Yeast Strains And Their Leavening Ability in Bread Dough)

ผู้เขียน:Imgนางฉกามาศ วงศ์ข้าหลวง, Imgนางมาลัย เมืองน้อย (บุญรัตนกรกิจ)

สื่อสิ่งพิมพ์:pdf

Abstract

Two new Baker’s yeast strains obtained from hybridization of commercial baker’s yeast parent strains, Saccharomyces cerevisiae IFRPD 6080 and IFRPD 6081 with Japanese mating strains were investigated. The hybrids, IFRPD 6171 from parent strain 6080 and IFRPD 6173 from parent strain 6081, were evaluated for their characteristics, namely growth, total carbohydrate and trehalose contents, sugar fermentation ability, cryoresistance at -20 ?C and their leavening ability in bread doughs. Both hybrids had good growth and higher maltose and sucrose fermentation abilities than their parents. Carbon dioxide productions in non-sugar, low-sugar and high-sugar dough were also markedly improved. In addition, hybrid 6171 possessed cryoresistance or freeze-tolerant ability in low-sugar dough and could be used for frozen dough preparation. Quality evaluation of white and sweet breads made from hybrids also showed better quality than their commercial parent strains. Thus, the hybrid 6171 was suitable for both white (low-sugar) and sweet breads (high-sugar) whereas hybrid 6173 was particularly good for sweet bread. Moreover, hybrid 6173 was also high in maltose fermentation ability and produced very high carbon dioxide in non-sugar dough, which indicated favorable characteristic to be used in nonsugar bread such as French bread.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 041, Issue 4, Oct 07 - Dec 07, Page 751 - 763 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Hybridization and Selection of Saccharomyces cerevisiae Strains from Industrial Baker’s Yeasts)

ผู้เขียน:Imgนางฉกามาศ วงศ์ข้าหลวง, ImgYasuo Nakatomi, ImgHiroyuki Takano

สื่อสิ่งพิมพ์:pdf

Abstract

Hybridization study of two Saccharomyces cerevisiae baker’s yeast strains isolated in Thailand, IFRPD 6080 and IFRPD 6081, was carried out. Rare-mating technique has been employed with haploid and diploid mating strains of Japanese baker’s yeast. Polyploid (triploid and tetraploid) hybrids produced from rare-mating were selected and induced for sporulation. Screening of segregants obtained from individual spore clones of the hybrids was performed by determination of their characteristics, i.e. yield of yeast after cultivation, total carbohydrate and trehalose contents of obtained yeast, and carbon dioxide (CO2) production during fermentation with bread dough. Two segregants, 6080xs4D s27 and 6080xs4D s39 derived from the parental strain IFRPD 6080 and one segregant, 6081xs34D s12 from the parental strain IFRPD 6081, with desirable characteristics were obtained as the new strains. These segregants possessed good growth yield and higher maltose fermentation ability than their parents. Carbon dioxide productions in non-sugar, low-sugar and high-sugar dough were also markedly improved. Moreover, the strain 6080xs4D s27 acquired certain freeze-tolerant ability from mating strain and was able to use for frozen dough preparation.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 038, Issue 2, Apr 04 - Jun 04, Page 255 - 266 |  PDF |  Page 

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Researcher

นาย วิสุทธิ์ จรูญธวัชชัย, ผู้ช่วยศาสตราจารย์

ที่ทำงาน:ภาควิชาวิทยาการภาษาและวัฒนธรรม คณะศิลปศาสตร์และวิทยาศาสตร์

สาขาที่สนใจ:Second language writing, Genre analysis, Discourse analysis

Resume

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Chemical, Biochemical and Physical Treatments on the Kinetics and on the Role of Some Endogenous Enzymes Action of Baker’s Yeast Lysis for Food-Grade Yeast Extrac

ผู้เขียน:ImgS. Boonraeng, ImgP. Foo-trakul, ImgW. Kanlayakrit, ImgC. Chetanachitra

สื่อสิ่งพิมพ์:pdf

Abstract

The effects of chemical, biochemical and physical treatments on lysis of baker’s yeast cells were studied at pH 5.2 and temperature 54 ?C. An unstructured kinetic model of first order was developed to understand the mechanism of yeast lysis. The autolysis rate constant (k), yield factor for protein (?P), total carbohydrate (?C) and autolysate (?A) were sensitive to disruption methods. Since there were endogenous enzymes in the yeast cells such as proteinases, glucanases and carboxypeptidases, these enzymes were responsible for synergistic of cell disruption and their activity profiles were affected by different treating methods. From the determined results of amino acids composition in yeast autolysate, there were differences in amino acid content. The biochemical treated sample using 0.1% papain gave the highest total amino acid content among all analysed samples.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 034, Issue 2, Apr 00 - Jun 00, Page 270 - 278 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:การปรับสภาพที่เหมาะสมด้วยวิธีทางเคมีชีวภาพและกายภาพสำหรับการย่อยสลายยีสต์ขนมปังเพื่อผลิตยีสต์สกัด

ผู้เขียน:Imgนายประศาสตร์ ฟูตระกูล, ผู้ช่วยศาสตราจารย์, ImgSupot BOONRAENG, ImgWeerasit Kanlayakrit, ImgCharan Chetanachitra

สื่อสิ่งพิมพ์:pdf

Abstract

The effects of chemical, biochemical and physical treatments on baker?s yeast lysis were studied. The standard conditions for autolysis were pH 5.2, temperature 54?C and yeast concentration 13% dry wt. The optimum chemical treatment obtained by using 5% v/v ethanol and 5% w/v NaCl. The optimum biochemical and physical treatments were the use of 0.1%w/w of papain and 8,000 psi of homogenization respectively. The combination treatment of 5% ethanol and 5% NaCl exhibited highest protein content (61.90%).The physical treated sample obtained 42.45% of total carbohydrate yield and biochemical treated sample obtained 46.53% of autolysate. The chemical analysis of the samples showed the best result in the biochemical treated sample as (g/100g dry wt): 57.50 of total protein, 8.22 of amino-nitrogen, 24.27 of carbohydrate, 7.86 of nucleic acid and 10.72 of ash contents. This treatment showed the feasibility of producing yeast extract, yeast autolysate at pilot plant or industrial scale.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 032, Issue 4, Oct 98 - Dec 98, Page 441 - 451 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา สังคมศาสตร์

หัวเรื่อง:-

ผู้เขียน:ImgIlyas Baker

สื่อสิ่งพิมพ์:pdf

Abstract

Although key agencies in the field of natural resources management do not have a comprehensive manpower development strategy, many staff will at some time attend development aid funded overseas degree level and post-graduate level courses, as well as overseas and in-country short-term courses. The last mentioned are becoming more and more popular with aid agencies and Thai counterparts although their effectiveness has never been established. The difficulties of assessing these are acknowledged and some subjective comments based on the author's experience are submitted. These relate to organization, the use of technical specialists, course content and language medium. Some comments on development aid training policy are also made and finally some suggestions are put forward whech if inplemented may contribute towards more effective manpower development strategies in the field of natural resources management. The existence of a sufficient quantity of skilled natural resource managers is without a doubt a key determinant of Thailand's successful sustainable development. Although manpower needs have never been formally quantified, the shortage is apparent and attempts to deal with this have already been implemented. Key agencies in the field of natural resources, rarely, if at all, have a comprehensive manpower development strategy, but nevertheless take advantage of opportunities to send dtaff to development aid funded overseas degree level and post-graduate level courses, as well as overseas and in-country short-term courses. The last mentioned are becoming more and more popular with aid agencies and Thai counterparts but their effectiveness has never been established. The business of assessing technical co-operation training activities is fraught with difficulty (Muscat, 1986) and perhaps this is why evaluation usually focuses on the direct or immediate project objectives using highly subjective self-completion questionnaires. Admittedly, it is difficult to find a satisfactory alternative means of assessment but this must not inhibit discourse among aid donors, the Thai government, technical experts, course organizers and course participants. Unless such discourse takes place aid foud and manpower are likely to remain inefficiently used and new and possibly more appropriate training initiatives are unlikely to be forthcoming. With regard to these training activities, I will restrict my comments to short-term in-country training programs as over the past few years I had some experience of these. After this some comments on development aid training policy will be made.

Article Info
Kasetsart Journal of Social Sciences -- formerly Kasetsart Journal (Social Sciences), Volume 008, Issue 1, Jan 87 - Jun 87, Page 104 - 110 |  PDF |  Page 

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ผลงานตีพิมพ์ในวารสารวิชาการ

English language policy in Thailand

ผู้แต่ง:ImgBaker, W., ImgMr.Wisut Jarunthawatchai, Assistant Professor,

วารสาร:

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