Ubonrat Siripatrawan's research while affiliated with Chulalongkorn University and other places

Publications (54)

Article
Clove essential oil nanoemulsion with optimal antimicrobial activity and stability was formulated and analyzed using response surface methodology with central composite design (CCD). The optimal clove oil nanoemulsion was obtained from microfluidizer (10,000 psi of operating pressure) of 1 % (v/v) clove oil, and 3% (v/v) of Tween® 80 (surfactant),...
Article
This study investigated the effect of wall material types and concentrations on hygroscopicity, solubility, encapsulation efficiency (EE), flavonoid recovery (FR), and antioxidant activity of catechin nanoemulsion (CaNE) powder produced by foam mat freeze-drying. CaNE containing 0.4 g/100 g green tea catechins was ultrasonically fabricated and foam...
Article
This research aimed to improve moisture barrier and functional properties of genipin‐crosslinked chitosan/astaxanthin film by heat curing. The effect of heat curing (25, 80 and 105°C) on film properties was investigated by measuring water vapor permeability (WVP), contact angle, tensile strength (TS), elongation at break (EAB), Young’s modulus (YM)...
Article
In this study, an environment-friendly pH-responsive indicator was prepared from hydroxypropyl methylcellulose/microcrystalline cellulose biocomposites (HMB) and butterfly pea (Clitoria ternatea) anthocyanin (BA). BA at concentrations of 10, 15, and 20 mg was incorporated into the HMB matrix. Physical and chemical properties, including NH3 sensitiv...
Article
The aim of this research was to study the effect of genipin crosslinking (0.5, 1.0 and 1.5% (w/w of chitosan)) on moisture barrier property and mechanical strength of chitosan‐astaxanthin film. The film functional properties including transparency, tensile strength (TS), elongation at break (EB), water transmission rate (WVTR) and oxygen transmissi...
Article
A simple and rapid label-free surface-enhanced Raman scattering (SERS) method involving silver nanoparticles, was developed to detect and discriminate Salmonella Enteritidis (S. Enteritidis) not only at a specie (Escherichia coli O157: H7; E. coli O157: H7), or a serovar level (Salmonella Gaminara; S. Gaminara) but also between the viable and non-v...
Article
A rapid and specific aptamer-based surface enhanced Raman spectroscopy (SERS) for the detection of S. enterica at a serovar level was developed. The aptamer was modified in this research with an additional short chain adenine and a fluorescein molecule. The aptamer-based SERS method could differentiate between S. enterica subsp. Enteritidis (S. Ent...
Article
A nanoemulsion approach to enhance antimicrobial performance of cinnamon essential oil as a natural preservative for the real food system was studied. The antimicrobial activity of cinnamon essential oil nanoemulsion (1429 and 11429 mg/L), in comparison to bulk cinnamon oil (488 and 11429 mg/L) and food industrial used sanitizer, sodium hypochlorit...
Article
The efficiency of ultrasonic nanoemulsion to improve physical stability and antioxidant activity of catechins when exposed to stress conditions imitating food process was investigated. The catechin nanoemulsions (CaNE) were fabricated using ultrasonication and subjected to different stress conditions including pH (2–8), ionic strengths (200–1000 mm...
Article
The consumption of herbal teas is increasing due to their special flavors and health benefits. Their flavor and chemical compositions vary depending on the plants used. Effective measurement of herbal teas is, thus, important to ensure its quality. This study proposed a rapid and nondestructive electronic sensor array (e-nose) coupled with chemomet...
Article
Phase inversion temperature (PIT)- fabricated cinnamon oil nanoemulsion was investigated for its antimicrobial and antioxidant efficacy to preserve quality and extend shelf-life of Asian seabass (Lates calcarifer) fillet during chilled storage (4 ± 2 °C). The fillets were treated with low and high concentrations of cinnamon oil nanoemulsion (CN) an...
Article
Early detection of fungal contamination can prevent fungal infected rice to enter food chains. This study aimed to use electronic nose coupled with chemometrics as a rapid and nondestructive method for detection of fungal contamination on brown rice grain. Jasmine brown rice was artificially infected with Aspergillus and stored at 30°C and 85 % RH....
Article
The water-dispersibility and antimicrobial activity of cinnamon oil is enhanced by encapsulating it within oil-in-water nanoemulsions. This study investigated the impact of oil phase composition on the minimum inhibitory concentration (MIC) of cinnamon oil nanoemulsions against Escherichia coli, Salmonella enterica serovar Typhimurium (S. Typhimuri...
Article
The impact of surfactant concentration (10 to 20 wt%) on the antimicrobial activity of cinnamon oil nanoemulsions formed by the phase inversion temperature (PIT) method was studied against a number of foodborne pathogens: Escherichia coli, Salmonella Typhimurium, Staphylococcus aureus and Vibrio parahaemolyticus. Minimum inhibitory concentration (M...
Article
A simultaneous evaluation of various quality attributes of packaged bratwurst using hyperspectral imaging (HSI) was developed. Changes in physicochemical (L*, a*, b* color values, pH and thiobarbituric acid (TBA)), microbiological (total viable counts (TVC) and lactic acid bacteria (LAB)) and sensory (color, odor and overall acceptability) characte...
Article
Active packaging from nanocomposite of chitosan and nanosized titanium dioxide (TiO2) to be used as an ethylene scavenging and antimicrobial film was developed. Chitosan films containing different TiO2 concentrations (0, 0.25, 0.5, 1 and 2% w/w) were fabricated and characterized for structural, mechanical, optical and barrier properties. The scanni...
Article
The feasibility of active packaging from chitosan (CS) and chitosan containing nanosized titanium dioxide (CT) to maintain quality and extend storage life of climacteric fruit was investigated. The CT nanocomposite film and CS film were fabricated using a solution casting method and used as active packaging to delay ripening process of cherry tomat...
Article
Essential oils, such as those isolated from cinnamon, are effective natural antimicrobial agents, but their utilization is limited by their low water-solubility. In this study, phase inversion temperature (PIT) was used to prepare cinnamon oil nanoemulsions. To this aim, it was hypothesized that cinnamon oil nanoemulsions could be fabricated by opt...
Article
A rapid method to evaluate and visualize quality of packaged dry-cured sausages was developed using hyperspectral imaging (HSI) spectroscopy. Changes in physicochemical, microbiological and sensory attributes of the packaged dry-cured sausages were monitored during storage at 20 °C. Discriminant factor analysis (DFA) was employed to classify sample...
Article
The effects of crude malva nut gum (CMG) on the texture, digestion and the glycaemic index (GI) of white bread were investigated. Different CMG levels (0%, 2.5%, 5%, 7.5% and 10% w/w based on weight of flour) were added into a bread formula. The lightness (L*) and loaf-specific volumes of the bread decreased with increased CMG levels. Firmness of t...
Article
Chitosan films containing 0, 2.5, 5, 10 and 20% w/w propolis extract (PE), high in polyphenols, were developed. The films’ tensile strength, elongation at break, total phenolic content and antioxidant activity increased, while water vapor permeability and oxygen permeability decreased with increasing propolis concentration. The ability of the films...
Article
This study proposed the use of nuclear magnetic resonance (NMR) technique based on proton spin–spin relaxation time (T2) of water to indicate freezing damage in frozen fruit and vegetable. T2 value can be used to indicate water content in the cells of samples. The results showed that T2 values of frozen-thawed samples were lower than those of fresh...
Article
Freezing clearly damages plant cells and tissues when ice crystals form, and these affect the quality and speed up the deterioration of frozen agricultural products. This study attempted to use a combined method of both xenon hydrate formation and the freezing process (CXF) to lengthen the preservation of barley coleoptile cells, as opposed to usin...
Article
Class visualization of multi-dimensional data from analysis of volatile metabolic compounds monitored using an electronic nose based on metal oxide sensor array was attained using a Kohonen network. An array of 12 metal oxide based chemical sensors was used to monitor changes in the volatile compositions from the headspace of packaged fresh sprouts...
Article
Full-text available
Moisture contents of Hom Nil rice flour for fixed extrusion conditions, 120 and 80°C of die and transition zone temperature of barrel, respectively and 250 rpm screw speed, were varied at 13, 15 and 17%. Physicochemical and sensory properties of the product were evaluated. The 15% moisture content of rice flour caused the optimum properties of extr...
Article
Vacuum impregnation (VI) was employed for development of minimally processed Indian gooseberry. Blanching of the fruits at different temperatures (70–90C) and times (20–60 s) was studied, and the process combination of 90C and 60 s was chosen as the most suitable for inactivation of peroxidase (POD) and maintaining stability of the fruit's color. A...
Article
The potential of using propolis collected from Thailand as a natural antioxidant and antimicrobial agent for food applications was investigated. The propolis extract was prepared by using different ethanol aqueous solutions, including 30%, 40%, 50% and 70%. Total phenolic content (TPC), phenolic compound and antioxidant activity of the propolis wer...
Article
Chitosan film incorporating green tea extract (CGT-film) was used as active packaging for shelf life extension of pork sausages. The physical, chemical, microbiological, and sensory qualities of pork sausages wrapped with CGT-film were compared with those wrapped with chitosan-alone film (C-film) and those without chitosan film wrapping (control)....
Article
Thailand is the world's largest exporter of tropical orchid flowers. However, orchid flowers are fragile and sensitive to ethylene that has a major role in the senescence of most orchid flowers. Ethylene-induced symptoms include flower discoloration, premature wilting and flower fall. In addition, increasing ethylene gas concentration inside the fl...
Article
A rapid method based on hyperspectral imaging for detection of Escherichia coli contamination in fresh vegetable was developed. E. coli K12 was inoculated into spinach with different initial concentrations. Samples were analyzed using a colony count and a hyperspectroscopic technique. A hyperspectral camera of 400-1000 nm, with a spectral resolutio...
Article
Full-text available
This research aims to investigate the effect of crude malva nut gum (CMG) addition on pasting and textural properties of wheat flour in the presence or absence of sodium chloride (NaCl). The mixtures were prepared by adding 0, 2.5, 5, 7.5 and 10% of CMG into wheat flour. Pasting results revealed that addition of CMG significantly elevated (P≤0.05)...
Article
a b s t r a c t An active film from chitosan incorporated with aqueous green tea extract (GTE) was developed. The effects of GTE concentrations including 2, 5, 10 and 20% (w/v) of green tea in the film-forming solution on the film properties were determined by measuring physical properties, total polyphenolic content and antioxidant activity of the...
Article
A rapid and accurate technique based on near infrared (NIR) spectroscopy integrated with chemometrics to identify and quantify two strains of Escherichia coli including E. coli ATCC 25922 and E. coli K12 grown in liquid media was developed. The samples were analyzed using aerobic count and recorded as colony forming units (CFU). The NIR spectra of...
Article
An alternative freshness index method for abalone (Haliotis asinina) muscle packaged under atmospheric air (Air) and modified atmosphere (MA) of 40% CO2: 30% O2: 30% N2 packaging conditions and stored at 2 ± 1 °C was developed. Biochemical indices covering pH, total volatile basic nitrogen (TVB-N), trimethylamine (TMA) and nucleotide degradation pr...
Article
The effects of methyl jasmonate coupled with modified atmosphere packaging (MJ+MAP) on the quality and shelf life of mature green tomato (Lycopersicon esculentum Mill.) were investigated during cold storage at 5 °C. Tomatoes were treated with 10−4 m MJ and packaged under 5%O2/5%CO2/90%N2 in a plastic bag. The effects of MJ+MAP were compared with co...
Article
Summary The effect of cold pre-treatment (CT) duration prior to freezing on the quality of a standard bread dough was investigated. Doughs held at 0 °C or 10 °C for 1 h or 3 h before air-blast freezing were compared with standard dough frozen after 0.5 h at 0 °C (0 °C/0.5 h) and fresh (unfrozen) dough. Cumulative gas production measured in a risogr...
Article
A rapid method to differentiate between E coli and Salmonella Typhimurium was developed. E. coli and S. Typhimurium were separately grown in super broth and incubated at 37°C. Super broth without inoculation of E. coli or S. Typhimurium was used as control. Numbers of E. coli and S. Typhimurium were followed using a colony counting method. Identifi...
Conference Paper
Full-text available
This research is fully supported by the Asia Research Center of Korea Foundation for Advanced Study at Chulalongkorn University. The overall objective of this project is to support national goal to promote Thailand as World leader in the production of safe, excellent quality and high value food products in the international marketplace by locating...
Article
Changes in the quality of abalone (Haliotis asinina Linnaeus) meat packaged under modified atmosphere (MA) of 40% CO 2 /30% O 2 /30% N 2 , vacuum and atmospheric air in polyvinylidene chloride (PVDC)/nylon/oriented polypropylene (OPP) pouches, and stored at 2 ± 1°C were investigated. Biochemical indices, such as pH, total volatile basic nitrogen (T...
Article
Actual storage shelf life test by storing a packaged product under typical storage conditions is costly and time consuming. A new approach using an artificial neural network (ANN) algorithm for shelf life prediction of two varieties of moisture-sensitive rice snacks packaged in polyethylene and polypropylene bags and stored at various storage condi...
Article
A novel method for shelf life prediction was established for a packaged moisture sensitive snack. Artificial neural network (ANN) based on multilayer perceptrons (MLP) with back propagation algorithm was developed to predict the shelf life of packaged rice snack stored at 30 °C and 75% RH, 30 °C and 85% RH and 40 °C and 75% RH, comparable to tropic...
Article
A rapid method for identification of foodborne pathogens contamination in packaged fresh vegetable using electronic sensor array and Kohonen self-organizing map (SOM) algorithm was developed. Escherichia coli was used as the target microorganism because its presence in foods indicates fecal contamination, and the presence of pathogenic microorganis...
Article
A rapid method for detection of Salmonella typhimurium contamination in packaged alfalfa sprouts using solid phase microextraction/gas chromatography/mass spectrometry (SPME/GC/MS) integrated with chemometrics was investigated. Alfalfa sprouts were inoculated with S. typhimurium, packed into commercial LDPE bags and stored at 10+2 degrees C for 0,...
Article
Moisture sorption isotherms of Thai Jasmine rice crackers were determined at 30, 45 and 60°C over a water activity range of 0.10 to 0.95 using a static gravimetric technique. Moisture sorption isotherms of rice crackers exhibited the sigmoid (Type II) shape. The moisture content of rice crackers decreased as temperature increased at a given water a...
Article
Full-text available
An electronic sensor array with 12 non-specific metal oxide sensors was evaluated for its ability to monitor volatile compounds in super broth, alone and in super broth inoculated with Salmonella Typhimurium at 37 °C for 2–14 h. Using discriminant function analysis (DFA), it was possible to differentiate super broth alone from that containing Salmo...
Article
Full-text available
A rapid method for the detection of Escherichia coli (ATCC 25922) in packaged alfalfa sprouts was developed. Volatile compounds from the headspace of packaged alfalfa sprouts, inoculated with E. coli and incubated at 10 degrees C for 1, 2, and 3 days, were collected and analyzed. Uninoculated sprouts were used as control samples. An electronic nose...
Article
The effects of chitosan coating and vacuum packaging on the quality and shelf-life of retail packaged grilled pork in a PVDC/nylon pouch during refrigerated storage at 2 ± 1°C were investigated. Grilled pork without chitosan coating and packaged in 100% air was used as the control sample. Firmness, pH, colour, peroxide values, microbial population...
Article
Changes in quality of abalone (Haliotis asinina Linnaeus) packaged under modified atmosphere (MA) of 40%CO 230%O 2 30%N2 and atmospheric air (control) in PVDC/Nylon/OPP pouches and stored at 2 ± 1°C were investigated. Biochemical indices (pH, total volatile basic nitrogen (TVB-N), and trimethylamine (TMA)), sensory evaluation, total, psychrotrophic...

Citations

... Microencapsulation is one of the most recommended techniques to achieve a controlled release of iron [42][43][44][45]. Table 2 shows the results of moisture, Aw, and bulk density, in which significant differences were observed due to the influence of the inlet temperature (p < 0. 05), regarding these three physical properties, they are considered essential during the storage of dry products, so it is recommended that moisture be below 5% [46][47][48]. On the other hand, Aw is related to biological and chemical deterioration mechanisms, such as enzymatic and non-enzymatic browning, high values would indicate the greater availability of free water, capable of participating in different reaction mechanisms, it is considered that in atomized products this value be lower than 0.6 [49,50]. ...
... The polyene chain of AST is capable of a strong antioxidant effect with a unique chemical structure that traps radicals [55], in which the long-conjugated double-bonded polyene possesses ROS removal capability by regulating the redox balance due to its inherent lipophilic and hydrophilic properties. Moreover, it exhibits higher antioxidant activity than other carotenoids such as β-carotene and lutein because of the presence of two oxygen groups, including hydroxyl (OH) and carbonyl (C = O) in each of the rings [56]. Consequently, as can be seen from the ABTS and DPPH assay of GO and AST, the synergistic combination of the AST and GO may provide unprecedented scenarios as new antioxidant material to those working in this nanobiotechnology field, thereby these materials can be considered as a strong candidate for an antioxidant platform for the treatment of various oxidative stress-mediated diseases. ...
... Smart or intelligent packaging is responsible for detecting environmental changes (e.g., humidity, gas and pH) of the food during storage, informing the consumer of the quality index of the packaged product [12]. The smart systems can be inserted as labels, printing or incorporated into the matrix of food packaging and act as O 2 and CO 2 detectors, pH-sensing indicators and time-temperature sensors due to the presence of dyes or enzymes [1,13]. ...
... As a low-toxic natural crosslinking agent for both chitosan and gelatin, genipin could be an ideal choice for making crosslinked chitosan/gelatin-based films [24,25]. Genipin is a water-soluble crosslinking agent isolated from gardenia, which reacts with the -NH 2 group of the polymer to give it a dark blue color [26]. Another interesting fact is that genipin has~10 4 times less toxicity than glutaraldehyde [27]. ...
... Particularly in food, some research has been carried out to show the antioxidant and antibacterial potential of this compound. Ruengdech and Siripatrawan, [151] elaborated nanoemulsions subjected to ultrasound, with the objective of increasing the physical and antioxidant stability of catechins, when subjected to stress conditions that simulate the food process. These emulsions showed good stability under the different stress conditions evaluated (4 ± 1 °C for 28 days). ...
... They are also potential to replace chemical preservatives in the field of food preservation due to their antibacterial, antiviral, antifungal, and antioxidant effects [4][5][6]. Studies have demonstrated the efficiency of EOs to inhibit the growth of pathogens and spoilers, and extend the shelf life of seafoods [7][8][9]. Furthermore, as they are derived from plants, they are generally recognized as safe (GRAS) by the United States Food and Drug Administration (USFDA) [4]. ...
... Furthermore, they can be indicative of other characteristics or faults within the products. The traditional methods to assess these compounds consist of either GC-MS equipment or less objective techniques such as descriptive sensory tests [35]. However, these methods are costly, time-consuming, and require large laboratory space and specialized personnel to conduct the tests, statistical analyses, and interpretation. ...
... As the temperature increases, the head groups of the surfactants become progressively dehydrated, and so their watersolubility decreases, which favors the formation of W/O emulsions or nanoemulsions [55]. Chuesiang et al. successfully produced antimicrobial cinnamon oil nanoemulsions using the PIT technique [56]. These nanoemulsions were shown to be effective at extending the shelf life of fish by inhibiting microbial growth. ...
... Thai Jasmine Brown Rice, also known as Brown Thai Fragrant Rice (Jiarpinijnun, Osako, & Siripatrawan, 2020), grows in eastern provinces of Thailand. Brown rice consisted of brown jasmine rice is one of the healthier rice's as compared to the white rice. ...
... Recently, M. alba leaves have been used for herbal tea, especially in Asian countries [5]. The bitterness of this tea was found to be positively correlated with the content of TPC and TFC in the leaves and their radical-scavenging abilities [108]. ...