Now showing items 1-20 of 36

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    Antibacterial activity of Chrysanthemum indicum, Centella asiatica and Andrographis paniculata on Bacillus cereus and Listeria monocytogenes under Low pH Stress 

    Patchanee Yasurin; Nateepat Pitinidhipat; Christina Vania Utami (2012)

    Classic food preservation methods do not guarantee to inhibit Bacillus cereus and Listeria monocytogenes growth. The application of natural antibacterial agent is an alternative way to control their growth. Asia herbs, Chrysanthemum indicum, Centella asiatica, and Andrographis paniculata were used in this experiment to test their antibacterial activity under low pH stress. Their antibacterial activities of 95% ethanolic crude extracts were tested on B. cereus and L. monocytogenes 10403S under different low pH stress by agar disc diffusion ...
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    Biodegradable human serum albumin nanoparticles as contrast agents for the detection of hepatocellular carcinoma by magnetic resonance imaging 

    Waralee Watcharin; Schmithals, Christian; Pleli, Thomas; Koberle, Verena; Korkusuz, Hudayi; Huebner, Frank; Zeuzem, Stefan; Korf, Hans W.; Vogl, Thomas J.; Rittmeyer, Claudia; Terfort, Andreas; Piiper, Albercht; Gelperina, Svetlana; Kreuter, Jorg (Elsevier, 2014)

    Tumor visualization by magnetic resonance imaging (MRI) and nanoparticle-based contrast agents may improve the imaging of solid tumors such as hepatocellular carcinoma (HCC). In particular, human serum albumin (HSA) nanoparticles appear to be a suitable carrier due to their safety and feasibility of function- alization. In the present study HSA nanoparticles were conjugated with gadolinium diethylenetriamine- pentaacetic acid (Gd-DTPA) using carbodiimide chemistry. The nanoparticles had a uniform spherical shape and a diameter of 235 ± 19 nm. For ...
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    Biofilm production by Zymomonas mobilis enhances ethanol production and tolerance to toxic inhibitors from rice bran hydrolysate 

    Tatsaporn Todhanakasem; Atit Sangsutthiseree; Kamonchanok Areerat; Young, Glenn M.; Pornthap Thanonkeo (2014-09)

    Microorganisms play a significant role in bioethanol production from lignocellulosic material. A challenging problem in bioconversion of rice bran is the presence of toxic inhibitors in lignocellulosic acid hydrolysate. Various strains of Zymomonas mobilis (ZM4, TISTR 405, 548, 550 and 551) grown under biofilm or planktonic modes were used in this study to examine their potential for bioconversion of rice bran hydrolysate and ethanol production efficiencies. Z. mobilis readily formed bacterial attachment on plastic surfaces, but not on glass ...
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    Chemical profiling of centella asiatica under different extraction solvents and its antibacterial activity, antioxidant activity 

    Patchanee Yasurin (2015)

    Centella asiatica (L) urban, synonym Hydrocotyle asiatica, is found almost all over the world. This plant is famous in Ayurvedic medicine and used in the management of central nervous system, skin and gastrointestinal disorder. Thus this research had been done to evaluate the effect of solvent extraction (Ethanol, Chloroform and Hexane) of C. asiatica on chemical profile, antioxidant activity and antibacterial activity against some foodborne pathogens. The result showed that all solvents (ethanol, chloroform and hexane) used in extraction showed ...
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    Combining means-end chain analysis and the portrait value questionnaire to research the influence of personal values on food choice 

    Kamolnate Kitsawad (Elsevier Ltd., 2014)

    Personal values can be measured using quantitative or qualitative methods. This paper aims to investi- gate the attribute-consequence-value patterns collected from means-end chain analysis and to examine their relationship to personal value domains from Schwartz value theory measured through the use of the Portrait Value Questionnaire. The study was performed on two product categories, potato chips and orange juice, in which two value segments of opposing value domains were found, Conservatism and Openness to change clusters. There was consistency ...
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    Comparison of sensory properties of freshly harvested and 1-year storage Thai rice 

    Aussama Soontrunnarudrungsri (Agro-Industry, Chiang Mai University, 2014-06)

    Thailand is a major producer and world supplier of rice, both aromatic and non-aromatic varieties. Rice sold as “new crop” shortly after it is harvested generally commands higher prices. The study compared differences in sensory properties of various aromatic (Khao Dawk Mali 105, RD 15, Pathum Thani 1) and non- aromatic (Chai Nat 1, Phitsanulok 2, Suphan Buri 1) rice varieties and differences in fresh rice and rice stored for 1 year. Floral, popcorn, and sewer/animal flavors were found in both rice samples but jasmine rice had higher intense of ...
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    Detection of hepatocellular carcinoma in transgenic mice by Gd-DTPA- and rhodamine 123-conjugated human serum albumin nanoparticles in T1 magnetic resonance imaging 

    Waralee Watcharin; Schmithals, Christian; Pleli, Thomas; Köberle, Verena; Korkusuz, Hüdayi; Hübner, Frank; Waidmann, Oliver; Zeuzem, Stefan; Korf, Horst-Werner; Terfort, Andreas; Gelperina, Svetlana; Vogl, Thomas J.; Kreuter, Jörg; Piiper, Albrecht (2015)

    Nanoparticle (NP)-based contrast agents that enable high resolution anatomic T1-weighted magnetic resonance imaging (MRI) offer the prospect of improving differential diagnosis of liver tumors such as hepatocellular carci- noma (HCC). In the present study, we investigated the possibility of employing novel non-toxic human serum albumin nanoparticles conjugated with Gd-DTPA and rhodamine 123 (Gd-Rho-HSA-NPs) for the detection of HCC by T1-weighted MRI. In addition, the influence of surface coating of the NPs with poloxamine 908, which al- ters the ...
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    Determination of suitable palate cleanser for spicy tom yum soup 

    Kamolnate Kitsawad (2014)

    Palate cleansers are required in sensory tests as they help improve the accuracy for sensory responses especially for foods containing strong flavour. The objective of this study is to determine a suitable palate cleanser that can be used to relief spiciness in a Thai dish, tom yum soup. The untrained judges rated the spiciness of three levels of spicy tom yum soups before and after using five palate cleanser strategies, water, bread, unsweetened milk, 10 percent sucrose and nothing. One palate cleanser strategy was used per session, thus the ...
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    Development of corn silk as a biocarrier for Zymomonas mobilis biofilms in ethanol production from rice straw 

    Tatsaporn Todhanakasem; Rashmi Tiwari; Pornthap Thanonkeo (2016-04)

    Z. mobilis cell immobilization has been proposed as an effective means of improving ethanol production. In this work, polystyrene and corn silk were used as biofilm developmental matrices for Z. mobilis ethanol production with rice straw hydrolysate as a substrate. Rice straw was hydrolyzed by dilute sulfuric acid (H2SO4) and enzymatic hydrolysis. The final hydrolysate contained furfural (271.95 ± 76.30 ppm), 5-hydroxymethyl furfural (0.07 ± 0.00 ppm), vanillin (1.81 ± 0.00 ppm), syringaldehyde (5.07 ± 0.83 ppm), 4- hydroxybenzaldehyde ...
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    Effect of drying process on the production of 5-hydroxymethylfurfural in citrofortunella microcarpa at two different maturity stages 

    Teeradate Kongpichitchoke; Hsu, Jue-Liang; Huang, Tzou-Chi (International Cooperation and Development Fund, 2015-05)

    Citrofortunella microcarpa is a well-known citrus fruit as a good source for flavonoids and antioxidant compounds in peels and seeds. However, they are leftover from juice industry. 5-Hydroxymethylfurfural (HMF) is well-recognized for its dominant role in immunology field, and commonly found in thermal-processed products. Thus, this study aimed to first time report HMF discovery from dried C. microcarpa waste. A conventional hot air drying method was used to determine the effects of drying temperatures (30 - 70 °C) and times as well as the maturity ...
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    Encapsulation of protease from Aspergillus oryzae and lipase from Thermomycess lanuginoseus using alginate and different copolymer type 

    Thu, Truong Thi Mong; Wunwisa Krasaekoopt (2016-07)

    Although the application of enzymes in food as a food processing aid and enzyme supplement is ofinterest and widely used, the enzymes can be easily deactivated or lose their activity due to many causessuch as pH and moisture as well as through the introduction of incompatible ingredients during foodprocessing and storage. These problems can be solved by the encapsulation technique, especially in a gelmatrix. The influences were studied of the alginate concentration, types of copolymer and their con-centrations on the bead size, encapsulation yield ...
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    Fermentation of rice bran hydrolysate to ethanol using Zymomonas mobilis biofilm immobilization on DEAE-cellulose 

    Tatsaporn Todhanakasem; Tipong Narkmit; Kamonchanok Areerat; Pornthap Thanonkeo (2015)

    Background: The major challenges associated with the fermentation of lignocellulosic hydrolysates are the reduction in the operating cost and minimizing the complexity of the process. Zymomonas mobilis biofilm has been emerged to resolve these complexities. Biofilm has been reported to tolerate to the toxic inhibitors and easily manipulated toward the cell recycle through the cell immobilization. Results: Z.mobilisZM4 and TISTR 551were able to develop biofilms onDEAE cellulose under the differences in the morphologies. Z. mobilis ZM4 developed ...
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    Freeze–thaw stability of edible oil-in-water emulsions stabilized by sucrose esters and Tweens 

    Suwimon Ariyaprakai; Kanitha Tananuwong (2015)

    This work aimed to investigate freeze thaw stability of 20 wt% coconut oil (CtO) and corn oil (CnO)- in-water emulsions stabilized by 1 wt% of various types of sucrose esters and Tweens. Sucrose esters composed mainly of sucrose monostearate (S1670), sucrose monopalmitate (P1670), sucrose monolaurate (L1695), Tween 20 (TW20), Tween 60 (TW60), and Tween 80 (TW80) were used. After all emulsions were frozen at 20 ± 2 C and thawed to room temperature, their stability was analyzed from visual appearance, optical micrographs, amounts of ...
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    In-vitro antibacterial activity screening of herb extracts against foodborne pathogenic bacteria from Thailand 

    Patchanee Yasurin; Sasiwan Piya-Isarakul (2015-09)

    Herbs have been used as traditional medicine since the ancient times as primary health care for local people. This experiment was aimed to study the individual antibacterial activity of six Thai local herbs (Tradescantia spathacea, Andrographis paniculata, Eleocharis acicularis, Acacia concinna, Phyllanthus niruri, and Tinospora cordifolia) against six foodborne pathogenic bacteria (Escherichia coli ATCC25822, Samonella enterica Typhimurium U302 (DT1046), S. enterica Enteritidis (human), S. enterica 4,5,12: i-(human) US clone, Bacillus cereus, ...
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    In-vitro Individual Antibacterial Activity Of Thai Red Curry Paste Ingredients Against Salmonella Enterica Enteritidis (Human) And Listeria Monocytogenes 10403s 

    Patchanee Yasurin; Treuktongjai Saenghiruna (2015)

    Thai red curry paste consists of herbs which have potential to be natural antibacterial agents. Therefore 7 herbs of Thai curry paste ingredients; Chili (Capsicum annuum), Kaffir lime (Citrus hystrix), Cumin (Cuminum cyminum L.), Shallot (Allium ascalonicum L.),Garlic (Allium sativum), Lemongrass (Cymbopogon citrates), and Galangal (Alpinia galangal), were investigated for their individual antibacterial activity againt Salmonella enterica Enteritidis (human) and Listeria monocytogenes 10403S by agar diffusion method Agar under 3 extraction3; ...
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    Interfacial and emulsifying properties of sucrose ester in coconut milk emulsions in comparison with Tween 

    Suwimon Ariyaprakai; Tanachote Limpachoti; Pasawadee Pradipasena (2013)

    In this study, sucrose esters were presented as a promising alternative to petrochemically synthesized Tweens for application in coconut milk emulsions. The interfacial and emulsifier properties of sucrose ester (SE), mainly sucrose monostearate, had been investigated in comparison with Tween 60 (TW), an ethoxylate surfactant. The interfacial tension measurement showed that SE had a slightly better ability to lower the interfacial tension at coconut oilewater interface. These surfactants (0.25 wt%) were applied in coconut milk emulsions with ...
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    Investigating the Effect of Cold Soak Duration on Phenolic Extraction during Cabernet Sauvignon Fermentation 

    Siriwan Panprivech; Lerno, Larry A.; Brenneman, Charles A.; Block, David E.; Oberholster, Anita (2015)

    The impact of increasing cold soak (CS) duration (0, 1, 4, 7, and 10 days at 10 °C) on the extraction of phenolic compounds during the CS period and primary fermentation as well as the final composition of Cabernet Sauvignon wine was investigated. The results showed that CS duration had no effect on hydroxycinnamate and flavonol extractions. Greater amounts of gallic acid, (+)-catechin, (−)-epicatechin, and total tannins were extracted with increasing CS duration, with differences maintained during bottle aging. Anthocyanin extraction and ...
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    Microbial Biofilm in the industry 

    Tatsaporn Todhanakasem (2013)

    Biofilms represent negative and positive attributes in the industries. Biofilm is a functional consortium of microorganisms attached to either biotic or abiotic surfaces and embedded under the extracellular polymeric substances (EPS). Spoilage and pathogenic microorganisms can develop biofilms on food industrial surfaces that can lead to food spoilage and disease transmission when the inappropriate clean up and control have been applied in the food industies. However, single and mixed species of microbial biofilms also represent tremendous ...
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    Microencapsulation of Litsea cubeba Essential Oil in β-Cyclodextrin Using Paste and Co-Precipitation Methods 

    Elizei, Pooyan Shakouri; Wunwisa Krasaaekoopt (2014)

    Microencapsulation of Litsea cubeba essential oil (LCEO) with β-cyclodextrin (BCD) was carried out using the paste and co-precipitation methods at various oil concentrations and ratios of LCEO to BCD adapted from a central composite design to determine the effect of these factors on the microencapsulation efficiency, microencapsulation yield, surface oil and recovery of the finished product. In addition, the effect of different levels of water activity and temperature on the oxidative stability of the powder was investigated. Treatment 4 ...
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    Microencapsulation of Probiotics in Hydrocolloid Gel Matrices: A Review 

    Wunwisa Krasaekoopt (2013)

    The use of hydrocolloid gel matrices to encapsulate probiotics is of interest due to their gentle and simplicity of gel formation as well as mild condition used. This technique enhances the viability of entrapped cells during the product shelf life at least above therapeutic minimum level as well as in the gastrointestinal tract to ensure the health benefits of consumers. This review describes the advantages of microencapsulation, hydrocolloid gel matrices such as alginate, carrageenan and whey protein, microencapsulation processes, special ...