Search Result of "Suchada Maisont"

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Some Physicochemical Properties of Paddy Rice Varieties on Puffing Qualities by Microwave “ORIGINAL”)

ผู้เขียน:ImgSuchada Maisont, ImgWoatthichai Narkrugsa

สื่อสิ่งพิมพ์:pdf

Abstract

Ten paddy rice varieties, both waxy and non-waxy paddy rice, which are cultivated in the northern and northeastern region of Thailand, were selected to study the effects of some physicochemical properties on the qualities of puffing rice (puffed yield, expansion volume, expansion ratio and bulk density) using microwaves at a frequency of 2450MHz and power at 800 watts. It was found that the amylose content (range 5.58-21.24%) was strongly negatively correlated with all qualities of puffed rice: puffed yield (r=-0.95**), expansion volume (r=-0.82**), expansion ratio (r=-0.79**) and bulk density (r=-0.78**). The starting time of puffing negatively correlated with puffed yield (r=-0.67*), while tightness of husk (lemma-palea) interlocking, thickness of ventral region layer, husk content, width and length of brown rice were unrelated to puffed rice quality. Amylose content could explain the puffing qualities of puffing rice. The coefficient of determination (R2), for the linear correlation with amylose content with regard to the quality of rice puffing for puffed yield, expansion volume, expansion ratio and bulk density was 0.91, 0.67, 0.62 and 0.61, respectively. Paddy rice with suitable physicochemical properties for puffing by microwave heating has low amylose, a thin ventral region and a puffing time that starts quickly and continues, as exhibited in rice varieties RD 6, RD 10 and NSPT.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 043, Issue 3, Jul 09 - Sep 09, Page 566 - 575 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : The Effect of Germination on GABA Content, Chemical Composition, Total Phenolics Content and Antioxidant Capacity of Thai Waxy Paddy Rice)

ผู้เขียน:ImgSuchada Maisont, ImgWoatthichai Narkrugsa

สื่อสิ่งพิมพ์:pdf

Abstract

The changes were studied in the GABA content (gamma aminobutyric acid), chemical composition, total phenolics content and antioxidant capacity from the germination process of Thai waxy paddy rice (RD6). The paddy rice was soaked to about 33% wet basis moisture content and then germinated in the cabinet incubator (28-30?C) for 0, 12, 24, 36, 48 and 60 h. Embryos were cut to determine the GABA content, and the germinated paddy rice was dried at 50?C using a tray dryer, dehusked and ground for analysis. It was found that the germination process significantly (p<0.05) increased GABA, dietary fiber, total phenolics content and antioxidant capacity, while the fat, protein, starch and amylose content trended to decrease slightly. There was little change in the early stage of germination and then a marked increase after 36 h. For the GABA content after soaking, it gradually increased from 80 to 220 mg/100 g embryo fresh weight from 12 to 60 h. Based on the results, germinated paddy rice can be considered as an alternative source of GABA and of dietary fiber content with high total phenolics content and high antioxidant capacity.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 044, Issue 5, Sep 10 - Oct 10, Page 912 - 923 |  PDF |  Page 

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Salt, Moisture Content and Microwave Power on Puffing Qualities of Puffed Rice)

ผู้เขียน:ImgSuchada Maisont, ImgWoatthichai Narkrugsa

สื่อสิ่งพิมพ์:pdf

Abstract

In this study, the effects of salt, moisture content and microwave power on the puffing qualities of puffed rice were investigated. Paddy rice was adjusted with water and 2% salt solution at four moisture levels 10, 13, 16 and 19% (wb) and puffed with microwave power at 600, 700 and 800 watts. The results showed that all the main factors and their interactions significantly (p<0.05) affected the puffing qualities of total puffed yield, fully puffed yield, small puffed yield, expansion volume, texture, color and microstructure. Paddy rice soaked in 2% salt solution produced a higher puffed yield than paddy rice soaked in water. Higher moisture content and microwave power produced puffed rice with higher puffed yield and expansion volume, but lower hardness. Puffing paddy rice at low moisture content (10%) with low microwave power (600 watts) produced the hardest puffed rice texture. Puffing at low moisture content and high wattage decreased the lightness of the puffed rice. Puffing paddy rice at 19% moisture content with 600-700 watts produced the highest fully puffed yield, but the lowest total puffed yield. The results suggested that high puffed yield and expansion volume with moderate hardness was produced using soaked paddy rice at 2% salt solution, 13% moisture content and puffed with 700 or 800 watts microwave power.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 044, Issue 2, Mar 10 - Apr 10, Page 251 - 261 |  PDF |  Page