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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Combined Osmotic and Microwave-vacuum Dehydration of Persimmon (Diospyros kaki)) ผู้เขียน: วิชมณี ยืนยงพุทธกาล,  นายไพศาล วุฒิจำนงค์, ผู้ช่วยศาสตราจารย์ , Keshavan Niranjan สื่อสิ่งพิมพ์:pdf AbstractWhole fruit persimmons were dehydrated osmotically by immersion in a ternary solutions consisting of sucrose and NaCl at a constant temperature (30?C). A second-order central composite design (CCD) with two variables was used involving combinations of sucrose concentration from 30 to 60 g / 100g and NaCl concentration from 0 to 10 g / 100g. The mass transfer parameters were experimentally determined by measuring Weight Reduction (WR), Water Loss (WL) and Solid Gain (SG). After impregnation soaking for 48 h the WR and WL were more than 0.4 kg/kg and the SG was less than 0.13 kg/kg. The mathematical models as a function of osmotic solution concentration were fitted to a 2nd order polynomial. The optimum sets were selected from the superimposed response surface plots. The best osmotic treatment condition was immersion of fruit in an osmotic solution containing 40 g/ 100g sucrose and 1 g/100g NaCl for 12 h 45 min to reach 35% solid content. The combined osmotic and microwave-vacuum dehydration could produce an osmo-dehydrated persimmon product which accepted by 81% of consumers and 61% of consumers would consider purchasing it. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Osmotic Dehydration of Coconut Pieces: Influence of Vacuum Pressure Pretreatment on Mass Transfer and Physical Characteristics) ผู้เขียน:Pimjai Maneepan, วิชมณี ยืนยงพุทธกาล สื่อสิ่งพิมพ์:pdf AbstractThe effects of vacuum pressure pretreatment on the osmotic dehydration of coconut pieces and on mass transfer parameters were studied and some physical characteristics were evaluated. The coconut pieces were immersed in sucrose solution (60% (w/w)) for 8 hr at room temperature. Samples were subjected to vacuum pressure at 50 and 65 mbar with different pretreatments: 1) vacuum pressure for 20 min, then atmospheric pressure and 2) vacuum pressure for 10 min, atmospheric pressure for 10 min, vacuum for 10 min, then atmospheric pressure. The results indicated that there was an interaction effect between the vacuum pressure levels and vacuum pretreatments on solid gain (P < 0.05) while the main effects of those two factors were found on water loss (P < 0.05). The vacuum pretreatment affected weight reduction (P < 0.05). The sample pretreated with 50 mbar had lower whiteness than the sample treated at atmospheric pressure (P < 0.05). The vacuum pressure pretreated sample had lower firmness and a lower cell disintegration index than the nonpretreated sample (P < 0.05). Microscopic observations revealed the integrity of the cellular matrix associated with mass transport behavior and mechanical properties. |
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 Researcherดร. สุคันธรส ธาดากิตติสารที่ทำงาน:สำนักงานเลขานุการ สถาบันค้นคว้าและพัฒนาผลิตผลทางการเกษตรและอุตสาหกรรมเกษตร สาขาที่สนใจ:เอนไซม์เทคโนโลยีและการประยุกต์, ชีวเคมี, เทคโนโลยีเอนไซม์, พัฒนาผลิตภัณฑ์อุตสาหกรรม Resume |
 Researcherดร. สุพนิดา วินิจฉัยที่ทำงาน:ฝ่ายนาโนเทคโนโลยีและเทคโนโลยีชีวภาพ สถาบันค้นคว้าและพัฒนาผลิตผลทางการเกษตรและอุตสาหกรรมเกษตร สาขาที่สนใจ:Raw material and cosmetics product from agricultural materials , Product development in cosmetics, Microbiology in cosmetics, Sensory in cosmetics and quality control in cosmetic products, Nanotechnology in cosmetic Resume |