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https://www.readbyqxmd.com/read/29048813/-determination-of-three-tranquillizer-residues-in-animal-foods-by-quechers-high-performance-liquid-chromatography-tandem-mass-spectrometry
#1
You Zou, Linzhi Shao, Simin Chen, Shaolun Ouyang, Feng Lin
A method for simultaneous determination of chlorpromazine, diazepam and metolazone residues in porcine muscle, fish, liver and kidney was developed using QuEChERS and HPLC-MS/MS technique. The samples were extracted with ethyl acetate and cleaned up with C18, N-propylethylendiamine (PSA) and NH2 sorbents after using Na2SO4 as dehydrating agent. The analytes were separated by a special C18 column, Atlantis T3, and gradiently eluted with a mixed solution of 5 mmol/L formic acid and acetonitrile at a flow rate of 0...
August 8, 2017: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/29048799/-high-sensitive-detection-of-multiple-allergenic-proteins-in-infant-food-with-high-resolution-mass-spectrometry
#2
Ci Wu, Xi Chen, Jianhui Liu, Xiaolin Zhang, Weifeng Xue, Zhen Liang, Mengyao Liu, Yan Cui, Daliang Huang, Lihua Zhang
A novel method of the simultaneous detection of multiple kinds of allergenic proteins in infant food with parallel reaction monitoring (PRM) mode using liquid chromatography-tandem mass spectrometry (LC-MS/MS) was established. In this method, unique peptides with good stability and high sensibility were used to quantify the corresponding allergenic proteins. Furthermore, multiple kinds of allergenic proteins are inspected simultaneously with high sensitivity. In addition, such method was successfully used for the detection of multiple allergenic proteins in infant food...
October 8, 2017: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/29048787/-rapid-determination-of-benzo-a-pyrene-in-foods-by-ultra-performance-liquid-chromatography-triple-quadrupole-mass-spectrometry-with-atmospheric-pressure-chemical-ionization
#3
Xiaoyi Zhang, Xiuyao Zhang, Xinxin Cai, Ruifen Li
A method for the determination of benzo[a]pyrene in foods was developed by ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) based on isotope dilution and molecularly imprinted solid-phase extraction (MIP-SPE). The target analyte in samples was extracted with n-hexane after spiked with benzo[a]pyrene-d12, and purified using MIP-SPE to eliminate most of the coextracts. The separation of benzo[a]pyrene was carried out on an XBridge BEH C18 column with gradient elution of methanol and water...
June 8, 2017: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/29048785/-determination-of-34-illegally-adulterated-weight-loss-compounds-in-foods-by-ultra-high-performance-liquid-chromatography-triple-quadrupole-mass-spectrometry
#4
Qing Hu, Jian Sun, Rui Feng, Su Zhang, Hong Yu, Jingxian Zhang, Xiuhong Mao, Shen Ji
An analytical method was developed for the determination of 34 illegally adulterated weight loss compounds in foods and dietary supplements by ultra high performance liquid chromatography-triple quadrupole mass spectrometry (UHPLC-MS/MS). A Waters CORTECS T3 column (100 mm×2.1 mm, 2.7 μm) was used with 0.1% (v/v) formic acid aqueous solution-acetonitrile containing 0.1% (v/v) formic acid as mobile phases by gradient elution. The compounds were detected by electrospray ion source in positive or negative mode with multiple reaction monitoring (MRM) mode...
June 8, 2017: Se Pu, Chinese Journal of Chromatography
https://www.readbyqxmd.com/read/29048161/effects-of-temperature-and-concentration-on-the-rate-of-photo-bleaching-of-erythrosine-in-water
#5
Joshua K G Karlsson, Owen J Woodford, Roza A S Al-Aqar, Anthony Harriman
Erythrosine, a popular food dye, undergoes fast O2-sensitive bleaching in water when subjected to visible light illumi-nation. In dilute solution, Erythrosine undergoes photo-bleaching via first-order kinetics, where the rate of bleaching depends critically on the rate of photon absorption and on the concentration of dissolved oxygen. Kinetic studies indi-cate that this inherent bleaching is augmented by self-catalysis at higher concentrations of Erythrosine and on long exposure times. Under the conditions used, bleaching occurs by way of geminate attack of singlet molecular oxygen on the chromophore...
October 19, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29046854/tannins-and-their-complex-interaction-with-different-organic-nitrogen-compounds-and-enzymes-old-paradigms-versus-recent-advances
#6
REVIEW
Bartosz Adamczyk, Judy Simon, Veikko Kitunen, Sylwia Adamczyk, Aino Smolander
Tannins, an abundant group of plant secondary compounds, raise interest in different fields of science, owing to their unique chemical characteristics. In chemical ecology, tannins play a crucial role in plant defense against pathogens, herbivores, and changing environmental conditions. In the food industry and in medicine, tannins are important because of their proven positive effect on human health and disease treatment. Such wide interests fueled studies on tannin chemistry, especially on their flagship ability to precipitate proteins...
October 2017: ChemistryOpen
https://www.readbyqxmd.com/read/29046194/the-role-of-intravenous-access-during-oral-food-challenges-in-food-protein-induced-enterocolitis-syndrome
#7
Laura E Pena, Danielle Guffey, Charles G Minard, Sara Anvari, Carla M Davis
BACKGROUND: Food protein-induced enterocolitis syndrome (FPIES) is a non-immunoglobulin E mediated food hypersensitivity syndrome characterized by profuse vomiting and diarrhea, which leads to lethargy, dehydration, and hypotension. Given the potential severity of reactions, resolution of FPIES is confirmed via oral food challenge (OFC) during which intravenous (IV) access is recommended to facilitate IV fluids (IVF) and steroid therapy. Risk factors for IV treatment are not well characterized...
November 1, 2017: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/29046023/-determination-of-a-new-cow-s-milk-based-formula-allergenic-capacity-in-7-infants
#8
Beatriz Estella López-Marín, Benjamín Rojano, Luz Marina Carvajal-de Pabón
BACKGROUND: Cow's milk protein allergy is the main allergic problem during the first year of life, possibly owing to immune and gastrointestinal systems poor maturation. To prevent allergic reactions, the content and type of proteins in infant formulas resemble those of breast milk. We believe that reactions are due rather to the amount than to the type of protein. OBJECTIVE: To design a new formula with cow's milk that provides the infant with the main nutrients at an affordable cost and with lower risk for the development of allergies...
July 2017: Revista Alergia Mexico: Organo Oficial de la Sociedad Mexicana de Alergia e Inmunología, A.C
https://www.readbyqxmd.com/read/29043603/epigenetic-modifications-of-gene-expression-by-lifestyle-and-environment
#9
REVIEW
Qudeer Ahmed Abdul, Byung Pal Yu, Hae Young Chung, Hyun Ah Jung, Jae Sue Choi
Epigenetics oftenly described as the heritable changes in gene expression independent of changes in DNA sequence. Various environmental factors such as nutrition-dietary components, lifestyle, exercise, physical activity, toxins, and other contributing factors remodel the genome either in a constructive or detrimental way. Since epigenetic changes are reversible and nutrition is one of the many epigenetic regulators that modify gene expression without changing the DNA sequence, dietary nutrients and bioactive food components contribute to epigenetic phenomena either by directly suppressing DNA methylation or histone catalyzing enzymes or by changing the availability of substrates required for enzymatic reactions...
October 17, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/29043212/antibacterial-anti-diarrhoeal-analgesic-cytotoxic-activities-and-gc-ms-profiling-of-sonneratia-apetala-buch-ham-seed
#10
Sheikh Julfikar Hossain, M Rabiul Islam, Tahmina Pervin, M Iftekharuzzaman, Omer A A Hamdi, Sanzida Mubassara, M Saifuzzaman, Jamil Ahmad Shilpi
Fruits of Sonneratia apetala (Buch.-Ham.), (English: mangrove apple, Bengali: keora) both seeds and pericarps, are largely consumed as food besides their enormous medicinal application. The fruit seeds have high content of nutrients and bioactive components. The seeds powder of S. apetala was successively fractionated using n-hexane, diethyl ether, chloroform, ethyl acetate, and methanol. The fractions were used to evaluate antibacterial, anti-diarrhoeal, analgesic, and cytotoxic activities. Methanol fraction of seeds (MeS) stronly inhibited Escherichia coli strains, Salmonella Paratyphi A, Salmonella Typhi, Shigella dysenteriae, and Staphylococcus aureus except Vibrio cholerae at 500 μg/disc...
September 2017: Preventive Nutrition and Food Science
https://www.readbyqxmd.com/read/29043008/ancestors-dietary-patterns-and-environments-could-drive-positive-selection-in-genes-involved-in-micronutrient-metabolism-the-case-of-cofactor-transporters
#11
Silvia Parolo, Sébastien Lacroix, Jim Kaput, Marie-Pier Scott-Boyer
BACKGROUND: During evolution, humans colonized different ecological niches and adopted a variety of subsistence strategies that gave rise to diverse selective pressures acting across the genome. Environmentally induced selection of vitamin, mineral, or other cofactor transporters could influence micronutrient-requiring molecular reactions and contribute to inter-individual variability in response to foods and nutritional interventions. METHODS: A comprehensive list of genes coding for transporters of cofactors or their precursors was built using data mining procedures from the HGDP dataset and then explored to detect evidence of positive genetic selection...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/29040083/consumption-of-edible-ice-contaminated-with-acinetobacter-pseudomonas-and-stenotrophomonas-is-a-risk-factor-for-fecal-colonization-with-extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-in-vietnam
#12
Tatsuya Nakayama, Nguyen Cong Ha, Phong Quoc Le, Ryuji Kawahara, Yuko Kumeda, Yoshinori Sumimura, Yoshimasa Yamamoto
Although Vietnamese residents frequently harbor extended-spectrum β-lactamase-producing Escherichia coli (ESBL-E), it is unclear which foods/beverages are risk factors for acquiring these bacteria. The aim of this study was to evaluate the frequency with which edible ice served in restaurants is contaminated with antibiotic-resistant bacteria, and thereby clarify whether this product poses a risk for ESBL-E carriage in humans. Ice from restaurants in Vietnam and Japan was screened for bacteria capable of growing on agar containing cefotaxime (BG-CTX)...
2017: Journal of Water and Health
https://www.readbyqxmd.com/read/29040080/detection-of-giardia-intestinalis-in-water-samples-collected-from-natural-water-reservoirs-and-wells-in-northern-and-north-eastern-poland-using-lamp-real-time-pcr-and-nested-pcr
#13
Anna Lass, Beata Szostakowska, Krzysztof Korzeniewski, Panagiotis Karanis
Giardia intestinalis is a protozoan parasite, transmitted to humans and animals by the faecal-oral route, mainly through contaminated water and food. Knowledge about the distribution of this parasite in surface water in Poland is fragmentary and incomplete. Accordingly, 36 environmental water samples taken from surface water reservoirs and wells were collected in Pomerania and Warmia-Masuria provinces, Poland. The 50 L samples were filtered and subsequently analysed with three molecular detection methods: loop-mediated isothermal amplification (LAMP), real-time polymerase chain reaction (real-time PCR) and nested PCR...
October 2017: Journal of Water and Health
https://www.readbyqxmd.com/read/29040011/bioactive-edible-films-for-food-applications-influence-of-the-bioactive-compounds-on-film-structure-and-properties
#14
Nasreddine Benbettaïeb, Thomas Karbowiak, Frédéric Debeaufort
Nowadays, a new generation of edible films is being especially designed for incorporating antimicrobials, antioxidants, enzymes or functional ingredients. Edible films made from natural biopolymers become the focus of many research works as an alternative to synthetic food packaging due to their edibility, biodegradability and compostability as well as to their use as active packaging. Active compounds incorporated in edible films could protect foods against deterioration during storage and therefore extend their shelf life...
October 17, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/29039041/evaluation-of-antioxidant-potential-of-essential-oils-of-some-commonly-used-indian-spices-in-in-vitro-models-and-in-food-supplements-enriched-with-omega-6-and-omega-3-fatty-acids
#15
Anwesa Bag, Rabi Ranjan Chattopadhyay
The aim of this study was to evaluate and compare the antioxidant potential of essential oils of some commonly used Indian spices (black pepper, cinnamon, clove, coriander and cumin) in various in vitro models and in food supplements enriched with omega-6 and omega-3 fatty acids. In vitro antioxidant potential was evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging and Fe(2+) ion-chelating methods and lipid oxidation stabilisation potential was evaluated in bulk soybean oil-fish oil mixture and their oil-in-water emulsions using peroxide value (PV), p-anisidine value (p-AV) and total oxidation value as indicators of oxidation...
October 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29035727/co-pyrolysis-characteristics-and-kinetic-analysis-of-organic-food-waste-and-plastic
#16
Yijing Tang, Qunxing Huang, Kai Sun, Yong Chi, Jianhua Yan
In this work, typical organic food waste (soybean protein (SP)) and typical chlorine enriched plastic waste (polyvinyl chloride (PVC)) were chosen as principal MSW components and their interaction during co-pyrolysis was investigated. Results indicate that the interaction accelerated the reaction during co-pyrolysis. The activation energies needed were 2-13% lower for the decomposition of mixture compared with linear calculation while the maximum reaction rates were 12-16% higher than calculation. In the fixed-bed experiments, interaction was observed to reduce the yield of tar by 2-69% and promote the yield of char by 13-39% compared with linear calculation...
October 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29034941/selective-photocatalysis-of-lignin-inspired-chemicals-by-integrating-hybrid-nanocatalysis-in-microfluidic-reactors
#17
Juan Carlos Colmenares, Rajender S Varma, Vaishakh Nair
This tutorial review assesses the available and possible strategies for attaining higher selectivity and yield of value-added chemicals from lignin using nanocatalysts embedded in a photomicroreactor. The design of the photomicroreactor, the choice of photocatalysts and the techniques for assembling the catalysts in such confined spaces are crucial elements. Lignin, a predominant industrial byproduct and pollutant, has been recognized today as a rich reservoir for aromatic chemicals and a prominent resource...
October 16, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/29033601/urine-metabolic-ratio-of-omeprazole-in-relation-to-cyp2c19-polymorphisms-in-russian-peptic-ulcer-patients
#18
Natalia P Denisenko, Dmitriy A Sychev, Zhanna M Sizova, Valeriy V Smirnov, Kristina A Ryzhikova, Zhannet A Sozaeva, Elena A Grishina
BACKGROUND: CYP2C19 is known to be the main enzyme of biotransformation of proton pump inhibitors (PPIs), whereas the CYP2C19 gene is highly polymorphic. Genotyping and phenotyping together represent more reliable data about patient's CYP2C19 activity. PURPOSE: The aim of the study was to investigate the applicability of urine metabolic ratio of omeprazole for CYP2C19 phenotyping in Russian peptic ulcer patients with different CYP2C19 genotypes. PATIENTS AND METHODS: A total of 59 patients (19 men and 40 women) aged 18-91 years (mean age 53...
2017: Pharmacogenomics and Personalized Medicine
https://www.readbyqxmd.com/read/29031891/low-efficacy-of-atopy-patch-test-in-predicting-tolerance-development-in-non-ige-mediated-cow-s-milk-allergy
#19
T A Gonzaga, F A Alves, M F A Cheik, C P de Barros, E R M A Rezende, G R S Segundo
BACKGROUND: The food atopy patch (APT) test has been used in previous studies to help the diagnosis of non-IgE mediated food allergies (FA). The aim of this study was to evaluate the efficacy of different cow's milk APT preparations to predict oral tolerance in children with previous non-IgE-mediated cow's milk allergy (CMA) diagnosis. METHODS: Thirty-two patients non-IgE-mediated CMA diagnosed by oral food challenge (OFC) were enrolled to perform APT with three different cow's milk preparations (fresh, 2% in saline solution, 2% in petrolatum) and comparing with a new OFC after at least three months of diet exclusion...
October 11, 2017: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/29031117/reactions-of-melolontha-hippocastani-adults-to-high-manganese-content-in-food
#20
Petr Martinek, Emanuel Kula, Josef Hedbávný
Rapid adaptation of insect species to environmental changes can be advantageous for their development. Forest cockchafer (Melolontha hippocastani) is herbivorous insect species with high food intake that has been widely studied within European conditions. It can cause huge economic and ecological losses especially in oak-dominated forest stands. Food preference of this species is mainly comprised of trees with a potential to accumulate manganese in their assimilation apparatus. In order to determine cockchafer's reactions to increased Mn concentration in its food, the adults were reared in laboratory conditions controlled for temperature, humidity, and light on a natural diet of oak (Quercus petraea) leaves...
October 11, 2017: Ecotoxicology and Environmental Safety
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