DSpace Collection: Faculty of Agricultural Technology

กระบวนการหนุนเสริมศักยภาพของชุมชนอัลฟาละห์ด้วยงานวิจัยเพื่อท้องถิ่น

Sat, 01 Jan 2011 00:00:00 GMT

Title: กระบวนการหนุนเสริมศักยภาพของชุมชนอัลฟาละห์ด้วยงานวิจัยเพื่อท้องถิ่น; Supporting process for community potential of alphalah with community-based research

Authors: Peerachai Kullachai; Sukhumaporn Khansri

การลดเชื้อ Campylobacter jejuni ในซากไก่ด้วยคลอรีนและโอโซน

Fri, 01 Jan 2010 00:00:00 GMT

Title: การลดเชื้อ Campylobacter jejuni ในซากไก่ด้วยคลอรีนและโอโซน; Reduction of Campylobacter jejuni in chicken carcass using chlorine and ozone

Authors: Panrapee Iamtaeweejarloen; Pravate Tuitemwong; Jirawat Kantakrienwong; Kooranee Tuitemwong

Abstract: Objectives of this study were to investigate the process sensitivity to Campylobacter spp. and to assess the reduction efficiency of ozonation and chlorination in chilling step of the poultry process using data derived from mCCDA plating and SimPlate MPN methods. Samples of 80 were collected from 4 process steps in the processing plant (scalding, plucking, inside outside washing, and chilling). Numbers of Campylobacter spp. on mCCDA at the respective steps were 3.35, 3.20, 2.68 and 0.20 logCFU/ml, while the SimPlate MPN had 2.54, 2.48, 2.31 and 0.84 log CFU/ml, respectively. Chillingis the most sensitive process to reduce the number of bacteria on both media. Chlorination at 1.5 ppm reduced Campylobacter spp. by 97.46% and 58.62% on mCCDA and SimPlate MPN. Ozonation at 1.92 ppm with co-current flow reduced the Campylobacter spp. by 77.33 % and 60.48 % at 30 min exposure and 71.99 % and 87.51 % at 60 min on the respective media. Ozonation at the chilling step appeared tobe an effective and alternative method of reduce the number of bacteria in poultry processing.

ความสัมพันธ์ของปริมาณแอนโทไซยานินต่อปริมาณโพลีฟีนอล และความสามารถในการต้านปฏิกิริยาออกซิเดชันในข้าวสีและไม่มีสีสายพันธุ์ต่างๆ

Fri, 01 Jan 2010 00:00:00 GMT

Title: ความสัมพันธ์ของปริมาณแอนโทไซยานินต่อปริมาณโพลีฟีนอล และความสามารถในการต้านปฏิกิริยาออกซิเดชันในข้าวสีและไม่มีสีสายพันธุ์ต่างๆ; Relationship between anthocyanin, polyphenol content and antioxidant activity in various pigmented and non-pigmented rice cultivars

Authors: Nipattha Chatsuwan; Varipat Areekul

Abstract: Anthocyanin, total polyphenol content and antioxidant activities of fifty-one Thai rice cultivars were investigated. The antioxidant activities were evaluated using three different assays; ferric reducing antioxidant power (FRAP), 2,2-azino-bis-(3-ethylbenzothi azoline-6-sulphonic acid) diammonium salt (ABTS) radical cation and oxygen radical absorbance capacity (ORAC) assays. The total polyphenol content (TPC) and anthocyanin content varied significantly and ranged from 0.194-8.702 and 0.001– 6.676 mg/g (dry wt), respectively. The extracts from pigmented rice exhibited higher TPC, anthocyanin content and antioxidant activities than did the non-pigmented varieties. Among them, glutinous dark rice (GDR) had the highest levels of TPC and anthocyanin content and exhibited the greatest antioxidant activities. The significant correlation coefficient was also noted between TPC, anthocyanin content and all three antioxidant assays ranged from 0.758-0.943 indicating that TPC in rice genotype were responsible for the antioxidant activities. These results revealed that the anthocyanin content and total polyphenol content as well as antioxidant activities in non-pigmented rice lower than pigmented rice cultivars.

การพัฒนาและการสุกแก่ของเมล็ดพันธุ์ปอเทือง

Fri, 01 Jan 2010 00:00:00 GMT

Title: การพัฒนาและการสุกแก่ของเมล็ดพันธุ์ปอเทือง; Seed development and maturation in sunn hemp (Crotalaria juncea L.)

Authors: Pittaya Promsuk; Quanchit Santipracha; Wullop Santipracha

Abstract: Study of sunn hemp seed development and maturation was studied at the Department of Plant Science, Faculty of Natural Resources, Prince of Songkla University, Hat Yai campus, Hat Yai, Songkhla, during March-June, 2008. The blooming flowers were tagged to indicate the date of flowering. Pods at 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43 and 46 days after flowering were harvested to investigate pod color, seed color and seed quality. The results showed that the sunn hemp had 6 developmental stages of pod color which were green, yellow-green, light grey-green, dark greygreen, grey-brown and grey-brown-black at 10-16, 19-28, 31, 34, 37-40 and 43-46 days after flowering, respectively. The sunn hemp seeds were capable of germination at approximately 25 days after flowering with seed dry weight of 17.13 mg/seed, moisture content of 79.05 % and standard germination of 5.50 %. The sunn hemp seeds reached physiological maturity at 37 days after flowering with maximum dry weight of 27.38 mg/seed, moisture content of 36.44 %, maximum standardgermination of 96.50%, with the highest soil emergence, speed of soil emergence index, seedling dry weight, root length and the low electrical conductivity. Hard seed developed at 40 days after flowering with seed moisture content of 27.64 %. Sunn hemp pods harvested for seed production should be at grey-brown color stage with brown colored seeds.