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https://www.readbyqxmd.com/read/29447579/double-gene-targeting-pcr-assay-for-the-detection-of-crocodylus-porosus-in-commercial-products
#1
Nina Naquiah, Md Eaqub Ali, M A Motalib Hossain, Sharmin Sultana, Mohammad Nasir Uddin Ahamad
The demand for crocodile meat is quickly growing because of its exotic and organoleptic appeal and also low content of cholesterol and lipids. Moreover, crocodile oil and blood have been used in alternative medicines for treating asthma and several other ailments since ancient times. Furthermore, crocodile hides have great demand in leather industries. All of these have collectively contributed to the extensive hunting, illegal trading and consequent decline of crocodiles in most parts of the world. To keep space with the growing demands, some crocodile species such as Crocodylus porosus have been raised in farms and its commercial trades have been legalized...
February 15, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29443904/comparison-of-conventional-and-microwave-assisted-heating-on-carbohydrate-content-antioxidant-capacity-and-postprandial-glycemic-response-in-oat-meals
#2
Joanna Harasym, Remigiusz Olędzki
Minimally processed cereal breakfast products from whole grain entered the market due to consumer demand of more nutritional food with more controlled sugar release. However, the subsequent processing of such products with different cooking methods in the consumer's kitchen may lead to significant differentiation of their nutritional value. Therefore, the evaluation of the impact of frequently used cooking methods on a final quality of breakfast cereals meal is needed. The present study investigates how the two different methods of heating, conventional and microwave (MW) assisted, affect the carbohydrate content, profile and resulting glycemic index of so prepared food as well as the antioxidant activity of meals...
February 14, 2018: Nutrients
https://www.readbyqxmd.com/read/29428757/short-communication-development-of-a-rapid-laboratory-method-to-polymerize-lactose-to-nondigestible-carbohydrates
#3
A F Kuechel, T C Schoenfuss
Nondigestible carbohydrates with a degree of polymerization between 3 and 10 (oligosaccharides) are commonly used as dietary fiber ingredients in the food industry, once they have been confirmed to have positive effects on human health by regulatory authorities. These carbohydrates are produced through chemical or enzymatic synthesis. Polylactose, a polymerization product of lactose and glucose, has been produced by reactive extrusion using a twin-screw extruder, with citric acid as the catalyst. Trials using powdered cheese whey permeate as the lactose source for this reaction were unsuccessful...
February 7, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29402430/application-of-mesoporous-carbon-polymer-monolith-for-the-extraction-of-phenolic-acid-in-food-samples
#4
Yu-Ching Kuo, Wen-Qian Heish, Hsi-Ya Huang, Wan-Ling Liu
In this study, activated carbon-organic polymer (AC-polymer) extraction columns were prepared via microwave-assisted polymerization. The AC-polymer was applied in polymer monolith microextraction (PMME) of phenolic acids (PAs) in food samples. Structural characterization using Raman and Fourier transform infrared (FTIR) spectroscopy revealed the successful incorporation of AC into polymer monolith. In contrast to neat polymer in which low extraction efficiency (17.0-57.7%) was observed, the AC-polymer (8 mg AC, 4 cm column length) afforded better extraction efficiency for PAs ranging from 75...
January 31, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29359953/energy-issues-in-microwave-food-processing-a-review-of-developments-and-the-enabling-potentials-of-solid-state-power-delivery
#5
J C Atuonwu, S A Tassou
The enormous magnitude and variety of microwave applications in household, commercial and industrial food processing creates a strong motivation for improving the energy efficiency and hence, sustainability of the process. This review critically assesses key energy issues associated with microwave food processing, focusing on previous energy performance studies, energy performance metrics, standards and regulations. Factors affecting energy-efficiency are categorised into source, load and source-load matching factors...
January 23, 2018: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29359947/recent-development-in-the-application-of-alternative-sterilization-technologies-to-prepared-dishes-a-review
#6
Mengsha Huang, Min Zhang, Bhesh Bhandari
Sterilization is one of the most effective food preservation methods. Conventional thermal sterilization commonly used in food industry usually causes the deterioration of food quality. Flavor, aroma, and texture, among other attributes, are significantly affected by thermal sterilization. However, demands of consumers for nutritious and safe dishes with a minimum change in their original textural and sensory properties are growing rapidly. In order to meet these demands, new approaches have been explored in the last few years to extend the shelf-life of dishes...
January 23, 2018: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29350257/a-new-approach-for-the-extraction-of-tetracyclines-from-soil-matrices-application-of-the-microwave-extraction-technique
#7
Paulina Łukaszewicz, Anna Białk-Bielińska, Joanna Dołżonek, Jolanta Kumirska, Magda Caban, Piotr Stepnowski
The widespread use of tetracyclines (TCs) in animal husbandry is associated with their constant penetration into the environment and the threat they might pose to living organisms. While the literature data on the analysis of these substances in such matrices as food, tissues, or wastewater are quite extensive, there are still only a few methods presented for the determination of these compounds in soil samples. Moreover, among the literature methods for the extraction of TCs from soil samples, microwave-assisted solvent extraction (MAE) was used only once and in combination with liquid chromatography with spectrophotometric detection (LC-UV)...
January 19, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29331518/microwave-assisted-ionic-liquid-mediated-rapid-catalytic-conversion-of-non-edible-lignocellulosic-sunn-hemp-fibres-to-biofuels
#8
Souvik Kumar Paul, Saikat Chakraborty
Sunn hemp fibre - a cellulose-rich crystalline non-food energy crop, containing 75.6% cellulose, 10.05% hemicellulose, 10.32% lignin, with high crystallinity (80.17%) and degree of polymerization (650) - is identified as a new non-food substrate for lignocellulosic biofuel production. Microwave irradiation is employed to rapidly rupture the cellulose's glycosidic bonds and enhance glucose yield to 78.7% at 160 °C in only 46 min. The reactants - long-chain cellulose, ionic liquid, transition metal catalyst, and water - form a polar supramolecular complex that rotates under the microwave's alternating polarity and rapidly dissipates the electromagnetic energy through molecular collisions, thus accelerating glycosidic bond breakage...
January 3, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29329842/optimization-of-microwave-assisted-extraction-of-morus-nigra-l-fruits-maximizing-tyrosinase-inhibitory-activity-with-isolation-of-bioactive-constituents
#9
Halil Koyu, Aslihan Kazan, Serdar Demir, Mehmet Zeki Haznedaroglu, Ozlem Yesil-Celiktas
Morus nigra L. is a beneficial food due to rich phenolic components. While aiming higher yields for bioactive constituents, reduction in terms of raw material, solvent, time and energy gained more importance to provide a sustainable life for human and nature. Microwave assisted extraction (MAE) of Morus nigra fruits was optimized in order to elicit process parameters maximizing bioactive metabolites and tyrosinase inhibitory activity. Spectrophotometry and UPLC-DAD-ESI-MS/MS systems were utilized for quantitative analysis of total phenol, flavonoid and anthocyanin contents...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29328809/methods-for-the-control-of-foodborne-pathogens-in-low-moisture-foods
#10
Alma Fernanda Sánchez-Maldonado, Alvin Lee, Jeffrey M Farber
Low-moisture foods (LMFs) have been defined as those food products with a water activity (aw) less than 0.85 and are generally considered less susceptible to microbial spoilage and the growth of foodborne pathogens. However, in recent years, outbreaks linked to LMFs have increased, with Salmonella spp., Bacillus cereus, Cronobacter sakazakii, Clostridium spp., Escherichia coli O157:H7, non-O157 E. coli, and Staphylococcus aureus being the principal pathogens involved. Because of the new concerns raised as a result of recent outbreaks, new approaches need to be developed to control foodborne pathogens in LMFs...
January 12, 2018: Annual Review of Food Science and Technology
https://www.readbyqxmd.com/read/29319330/recent-developments-in-high-efficient-freeze-drying-of-fruits-and-vegetables-assisted-by-microwave-a-review
#11
Kai Fan, Min Zhang, Arun S Mujumdar
Microwave heating has been applied in the drying of high-value solids as it affords a number of advantages, including shorter drying time and better product quality. Freeze-drying at cryogenic temperature and extremely low pressure provides the advantage of high product quality, but at very high capital and operating costs due partly to very long drying time. Freeze-drying coupled with a microwave heat source speeds up the drying rate and yields good quality products provided the operating unit is designed and operated to achieve the potential for an absence of hot spot developments...
January 10, 2018: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29316679/comparison-of-conventional-and-microwave-treatment-on-soymilk-for-inactivation-of-trypsin-inhibitors-and-in-vitro-protein-digestibility
#12
Brinda Harish Vagadia, Sai Kranthi Vanga, Ashutosh Singh, Yvan Gariepy, Vijaya Raghavan
Soymilk is lower in calories compared to cow's milk, since it is derived from a plant source (no cholesterol) and is an excellent source of protein. Despite the beneficial factors, soymilk is considered as one of the most controversial foods in the world. It contains serine protease inhibitors which lower its nutritional value and digestibility. Processing techniques for the elimination of trypsin inhibitors and lipoxygenase, which have shorter processing time and lower production costs are required for the large-scale manufacturing of soymilk...
January 8, 2018: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/29287346/development-of-a-quantitative-approach-using-raman-spectroscopy-for-carotenoids-determination-in-processed-sweet-potato
#13
Juliano Antônio Sebben, Juliana da Silveira Espindola, Lucas Ranzan, Neusa Fernandes de Moura, Luciane Ferreira Trierweiler, Jorge Otávio Trierweiler
The orange-fleshed sweet potato is a vegetable-rich in carotenoids. The thermic treatment for sweet potato processing can decrease the content of these constituents in the foods, lowering their bioactive properties. Raman spectroscopy has been growing as a fast tool to food analysis, especially for detection of low concentrations of carotenoids and to the monitoring of its degradation profile over time. Therefore, in this work were evaluated two methods of drying, hot air and microwaving with rotary drum, combined with quantitative Raman spectroscopy...
April 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29261333/chemical-and-physical-pretreatments-of-fruits-and-vegetables-effects-on-drying-characteristics-and-quality-attributes-a-comprehensive-review
#14
Li-Zhen Deng, Arun S Mujumdar, Qian Zhang, Xu-Hai Yang, Jun Wang, Zhi-An Zheng, Zhen-Jiang Gao, Hong-Wei Xiao
Pretreatment is widely used before drying of agro-products to inactivate enzymes, enhance drying process and improve quality of dried products. In current work, the influence of various pretreatments on drying characteristics and quality attributes of fruits and vegetables is summarized. They include chemical solution (hyperosmotic, alkali, sulfite and acid, etc.) and gas (sulfur dioxide, carbon dioxide and ozone) treatments, thermal blanching (hot water, steam, super heated steam impingement, ohmic and microwave heating, etc), and non-thermal process (ultrasound, freezing, pulsed electric field, and high hydrostatic pressure, etc)...
December 20, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29172986/bisphenol-a-and-bisphenol-s-release-in-milk-under-household-conditions-from-baby-bottles-marketed-in-italy
#15
Giacomo Russo, Francesco Barbato, Eleonora Cardone, Margherita Fattore, Stefania Albrizio, Lucia Grumetto
A simple and sensitive validated analytical method based on liquid chromatography coupled to tandem fluorescence (FD) and ultraviolet (UV) spectrophotometry was applied to monitor the presence of bisphenol A and bisphenol S in plastic baby bottles marketed in Italy. The limits of detection (LOD) were 3.75 ng mL-1 and 80.00 ng mL-1, and those of quantification (LOQ) were 12.51 ng mL-1 and 260.00 ng mL-1 for BPA (FD detection) and for BPS (UV detection), respectively. BPA was found in only four samples, two samples undergone to microwave heating and two samples undergone to bottle warmer heating either at 40°C or at 80°C...
November 27, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29165479/evaluation-of-the-impact-of-food-matrix-change-on-the-in-vitro-bioaccessibility-of-carotenoids-in-pumpkin-cucurbita-moschata-slices-during-two-drying-processes
#16
Zhongyuan Zhang, Xiaoyan Wang, Yixiang Li, Qiuyu Wei, Chunju Liu, Meimei Nie, Dajing Li, Yadong Xiao, Chunquan Liu, Lang Xu, Min Zhang, Ning Jiang
The food matrix is a limiting factor in determining the bioaccessibility of carotenoids. The impact of food matrix change on the bioaccessibility of carotenoids during drying processes is still unknown. The effect of intermittent microwave vacuum-assisted drying (IMVD) and hot air drying (HAD) on the in vitro liberation and micellization of carotenoids in pumpkin slices was studied. This variable depended on the changes of the matrix driven by the drying process. Different changes in the cell morphology and carotenoid distribution of pumpkin slices during the two processing methods were observed...
November 22, 2017: Food & Function
https://www.readbyqxmd.com/read/29145136/lead-cadmium-and-arsenic-in-human-milk-and-their-socio-demographic-and-lifestyle-determinants-in-lebanon
#17
Maya Bassil, Farah Daou, Hussein Hassan, Osama Yamani, Joelle Abi Kharma, Zouheir Attieh, Jomana Elaridi
INTRODUCTION: Exposure of newborns to toxic metals is of special interest due to their reported contamination in breast milk and potential harm. The aim of this study was to assess the occurrence and factors associated with lead, cadmium and arsenic contamination in breast milk collected from lactating mothers in Lebanon. METHODS: A total of 74 breast milk samples were collected from primaparas according to guidelines set by the World Health Organization. A survey was administered to determine the demographic and anthropometric characteristics of participating lactating mothers...
January 2018: Chemosphere
https://www.readbyqxmd.com/read/29143440/use-of-innovative-micro-extraction-techniques-to-characterise-harpagophytum-procumbens-root-and-its-commercial-food-supplements
#18
Alina Diuzheva, Simone Carradori, Vasil Andruch, Marcello Locatelli, Elisa De Luca, Matteo Tiecco, Raimondo Germani, Luigi Menghini, Alessio Nocentini, Paola Gratteri, Cristina Campestre
INTRODUCTION: For the determination of harpagoside and the wide phenolic pattern in Harpagophytum procumbens root and its commercial food supplements, dispersive liquid-liquid microextraction (DLLME), ultrasound-assisted DLLME (UA-DLLME), and sugaring-out liquid-liquid extraction (SULLE) were tested and compared. OBJECTIVES: In order to optimise the extraction efficiency, DLLME and UA-DLLME were performed in different solvents (water and aqueous solutions of glucose, β-cyclodextrin, (2-hydroxypropyl)-β-cyclodextrin, sodium chloride, natural deep eutectic solvent, and ionic liquid)...
November 16, 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/29100872/bioaccesibility-of-cylindrospermopsin-from-cooked-fish-muscle-after-the-application-of-an-in-vitro-digestion-model-and-its-bioavailability
#19
Sara Maisanaba, Federica Saladino, Guillermina Font, Ángeles Jos, Ana M Cameán, Giuseppe Meca
Humans can be exposed to cyanotoxins through the ingestion of contaminated water, food or beverages. In the present work, the bioaccesibility of Cylindrospermopsin (CYN), one of the most relevant cyanotoxins, was evaluated in a pure CYN solution and cooked CYN-contaminated fish muscles (20 μg/mL). An in vitro digestion model including the salivar, gastric, duodenal and colonic phases was performed, being each fraction analyzed by HPLC-MS-MS to evaluate CYN degradation. Moreover, Caco-2/TC7 cells were exposed to the digested duodenal and colonic phases to elucidate the final bioavailability of CYN in an approximation to the real human exposure scenario...
October 31, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29099795/microwave-assisted-extraction-of-cannabinoids-in-hemp-nut-using-response-surface-methodology-optimization-and-comparative-study
#20
Chih-Wei Chang, Ching-Chi Yen, Ming-Tsang Wu, Mei-Chich Hsu, Yu-Tse Wu
Hemp nut is commonly incorporated into several food preparations; however, most countries set regulations for hemp products according to their cannabinoid content. In this study, we have developed an efficient microwave-assisted extraction (MAE) method for cannabinoids (i.e., Δ9-tetrahydrocannabinol, cannabidiol, and cannabinol) in hemp nut. Optimization of the MAE procedure was conducted through single factor experiments and response surface methodology (RSM). A comparative study was also conducted to determine the differences in the extraction yields and morphology of hemp nut between MAE and reference extraction methods, namely heat reflux extraction (HRE), Soxhlet extraction (SE), supercritical fluid extraction (SFE), and ultrasound-assisted extraction (UAE)...
November 3, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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