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https://www.readbyqxmd.com/read/28213218/dynamic-flow-through-approach-to-evaluate-readily-bioaccessible-antioxidants-in-solid-food-samples
#1
Miguel A Maia, Tânia R P Soares, Ana I P Mota, María Rosende, Luís M Magalhães, Manuel Miró, Marcela A Segundo
Release of bioactive compounds from food matrices is regarded as the first step towards their human bioavailability. The objective of this work was the implementation of an affordable and robust flow-through device for expedient dynamic leaching experiments aiming at the assessment of readily bioaccessible antioxidant compounds in solid food commodities. A simple configuration is proposed using commercially available devices containing regenerated cellulose filters placed in polypropylene holders to entrap the solid sample, featuring a disposable, single use extraction chamber...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28212322/detection-of-salmonella-typhimurium-on-spinach-using-phage-based-magnetoelastic-biosensors
#2
Fengen Wang, Shin Horikawa, Jiajia Hu, Howard C Wikle, I-Hsuan Chen, Songtao Du, Yuzhe Liu, Bryan A Chin
Phage-based magnetoelastic (ME) biosensors have been studied as an in-situ, real-time, wireless, direct detection method of foodborne pathogens in recent years. This paper investigates an ME biosensor method for the detection of Salmonella Typhimurium on fresh spinach leaves. A procedure to obtain a concentrated suspension of Salmonella from contaminated spinach leaves is described that is based on methods outlined in the U.S. FDA Bacteriological Analytical Manual for the detection of Salmonella on leafy green vegetables...
February 16, 2017: Sensors
https://www.readbyqxmd.com/read/28208744/uncovering-adiponectin-replenishing-property-of-sujiaonori-algal-biomaterial-in-humans
#3
Nlandu Roger Ngatu, Mitsunori Ikeda, Hiroyuki Watanabe, Mamoru Tanaka, Masataka Inoue, Sakiko Kanbara, Sayumi Nojima
The replenishment of adiponectin-an adipocyte-derived hormone with salutary health effects-has recently been proposed as a new approach to treat hypertension, also ameliorate cardiovascular and metabolic risks. We conducted a prospective placebo-controlled, non-randomized and investigator-blinded dietary intervention study to evaluate the health effects of dietary intake of Sujiaonori (Ulva/Enteromorpha prolifera Müller) algal biomaterial (SBM), especially on adiponectin production, blood pressure (BP), and body mass index (BMI) in human subjects...
February 8, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28208298/surface-accessibility-and-dynamics-of-macromolecular-assemblies-probed-by-covalent-labeling-mass-spectrometry-and-integrative-modeling
#4
Carla Schmidt, Jamie A Macpherson, Andy M Lau, Ken Wei Tan, Franca Fraternali, Argyris Politis
Mass spectrometry (MS) has become an indispensable tool for investigating the architectures and dynamics of macromolecular assemblies. Here we show that covalent labeling of solvent accessible residues followed by their MS-based identification yields modeling restraints that allow mapping the location and orientation of subunits within protein assemblies. Together with complementary restraints derived from cross-linking and native MS, we built native-like models of four heterocomplexes with known subunit structures and compared them with available X-ray crystal structures...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28199145/characterization-and-virulence-potential-of-serogroup-o113-shiga-toxin-producing-escherichia-coli-strains-isolated-from-beef-and-cattle-in-the-united-states
#5
Peter Feng, Sabine Delannoy, David W Lacher, Joseph M Bosilevac, Patrick Fach
Shiga toxin-producing Escherichia coli (STEC) of serotype O113:H21 have caused severe diseases but are unusual in that they do not produce the intimin protein required for adherence to intestinal epithelial cells. Strains of serogroup O113 are one of the most common STEC found in ground beef and beef products in the United States, but their virulence potential is unknown. We used a microarray to characterize 65 O113 strains isolated in the United States from ground beef, beef trim, cattle feces, and fresh spinach...
February 15, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28198489/negative-effects-of-divalent-mineral-cations-on-the-bioaccessibility-of-carotenoids-from-plant-food-matrices-and-related-physical-properties-of-gastro-intestinal-fluids
#6
Joana Corte-Real, Marie Bertucci, Christos Soukoulis, Charles Desmarchelier, Patrick Borel, Elke Richling, Lucien Hoffmann, Torsten Bohn
Carotenoid intake and tissue levels have been frequently associated with reduced risk of chronic diseases. However, their bioavailability is low and influenced by many dietary related parameters. Divalent mineral cations have been suggested to interfere with carotenoid digestion and to hamper micellarization, a prerequisite for their uptake, via complexation of bile salts and precipitation of fatty acids. In the present investigation, we have evaluated the effects of increasing concentrations of magnesium (0-300 mg L(-1)), calcium (0-1500 mg L(-1)), zinc (0-200 mg L(-1)), and sodium (0-1500 mg L(-1); control monovalent cation), on carotenoid bioaccessibility from frequently consumed food items rich in carotenoids (tomato juice, carrot juice, apricot nectar, spinach and field salad), following simulated gastro-intestinal digestion...
February 15, 2017: Food & Function
https://www.readbyqxmd.com/read/28193046/probing-the-lysine-proximal-microenvironments-within-membrane-protein-complexes-by-active-dimethyl-labeling-and-mass-spectrometry
#7
Ye Zhou, Yue Wu, Mingdong Yao, Zheyi Liu, Jin Chen, Jun Chen, Lirong Tian, Guangye Han, Jian-Ren Shen, Fangjun Wang
Positively charged lysines are crucial to maintaining the native structures of proteins and protein complexes by forming hydrogen bonds and electrostatic interactions with their proximal amino acid residues. However, it is still a challenge to develop an efficient method for probing the active proximal microenvironments of lysines without changing their biochemical/physical properties. Herein, we developed an active covalent labeling strategy combined with mass spectrometry to systematically probe the lysine proximal microenvironments within membrane protein complexes (∼700 kDa) with high throughput...
December 20, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/28180326/use-of-baby-spinach-and-broccoli-for-imaging-of-structured-cellular-rnas
#8
Maho Okuda, Dominique Fourmy, Satoko Yoshizawa
No abstract text is available yet for this article.
February 17, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28169510/differences-in-internalization-and-growth-of-escherichia-coli-o157-h7-within-the-apoplast-of-edible-plants-spinach-and-lettuce-compared-with-the-model-species-nicotiana-benthamiana
#9
Kathryn M Wright, Louise Crozier, Jacqueline Marshall, Bernhard Merget, Ashleigh Holmes, Nicola J Holden
Internalization of food-borne bacteria into edible parts of fresh produce plants represents a serious health risk. Therefore, internalization of verocytotoxigenic E. coli O157:H7 isolate Sakai was assessed in two species associated with outbreaks, spinach (Spinacia oleracea) and lettuce (Lactuca sativa) and compared to the model species Nicotiana benthamiana. Internalization occurred in the leaves and roots of spinach and lettuce throughout a 10 day time-course. The plant species, tissue type and inoculum dose all impacted the outcome...
February 7, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28159293/determination-of-pesticide-residues-in-leafy-vegetables-at-parts-per-billion-levels-by-a-chemometric-study-using-gc-ecd-in-cameron-highlands-malaysia
#10
Yang Farina, Md Pauzi Abdullah, Nusrat Bibi, Wan Mohd Afiq Wan Mohd Khalik
A simple and sensitive analytical method has been developed employing gas chromatography coupled with electron capture detector (GC-ECD), and validated for screening and quantification of 15 pesticide residues at trace levels in cabbage, broccoli, cauliflower, lettuce, celery, spinach, and mustard. The method consists of two steps, first, to determine the significance of each factor by Pareto chart followed by optimization of these significant factors using central composite design (CCD). Minitab statistical software was used for these multivariate experiments for the generation of 2(4-1) design and CCD matrices...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28159287/adaption-of-an-in-vitro-digestion-method-to-screen-carotenoid-liberation-and-in-vitro-accessibility-from-differently-processed-spinach-preparations
#11
Jane N Eriksen, Amy Y Luu, Lars O Dragsted, Eva Arrigoni
Dark green leafy vegetables are primary food sources for lutein and β-carotene, however these bioactives have low bioavailability. The effects of mechanical and thermal processing as well as fat addition and fat type on lutein and β-carotene liberation and in vitro accessibility from spinach were investigated. Lutein liberation and in vitro accessibility were three-fold higher from spinach puree compared to whole leaves. Results for β-carotene liberation were similar, whereas that of β-carotene accessibility was only about two-fold...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28154983/modifications-of-the-chromophore-of-spinach-aptamer-based-on-qm-mm-calculations
#12
Katarína Skúpa, Ján Urban
Spinach aptamer was developed as an RNA analog of the green fluorescent protein. The aptamer interacts with its ligand and modifies its electronic spectrum so that it fluoresces brightly at the wavelength of 501 nm. Song et al. investigated modifications of the ligand in their experimental study and found a molecule emitting at 523 nm upon creating a complex with the Spinach aptamer. The crystal structure of the aptamer in complex with its original ligand has been published, which enabled us to study the system computationally...
February 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28144013/genome-sequence-of-spinach-cryptic-virus-1-a-new-member-of-the-genus-alphapartitivirus-family-partitiviridae-was-identified-in-spinach
#13
Dongbin Park, Yoonsoo Hahn
A distinct double-stranded RNA (dsRNA) cryptic virus, named spinach cryptic virus 1 (SpCV1), was identified from spinach transcriptome datasets. The SpCV1 genome has two dsRNA genome segments. The larger dsRNA1 has an open reading frame (ORF) for a conserved RNA-dependent RNA polymerase (RdRp). The smaller dsRNA2 encodes a putative coat protein (CP). The sequence identity of SpCV1 RdRp and CP to the closest cryptic virus is 81% and 60%, respectively. Phylogenetic analysis indicates that SpCV1 is a novel member of the genus Alphapartitivirus (family Partitiviridae)...
February 1, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28133481/a-case-control-study-of-risk-factors-for-salivary-gland-cancer-in-canada
#14
Sai Yi Pan, Margaret de Groh, Howard Morrison
Aim. To assess the effect of various lifestyle risk factors on the risk of salivary gland cancer in Canada using data from a population-based case-control study. Methods. Data from a population-based case-control study of 132 incident cases of salivary gland cancer and 3076 population controls were collected through self-administered questionnaire and analysed using unconditional logistic regression. Results. Four or more servings/week of processed meat product was associated with an adjusted odds ratio (OR) and corresponding 95% confidence interval (CI) of 1...
2017: Journal of Cancer Epidemiology
https://www.readbyqxmd.com/read/28121272/multivariate-characterization-of-elements-accumulated-in-wolfiporia-extensa-mushroom-from-yunnan-province-of-china
#15
Jing Sun, Ji Zhang, Yuanzhong Wang
Dried sclerotia of Wolfiporia extensa have been used as medicine in Asia from Eastern Han Dynasty, and also used as traditional snack called "fulingjiabing" in Beijing, China. In this paper, 18 macro and trace elements (Ag, As, Ba, Cd, Co, Cr, Cs, Cu, Fe, Li, Mn, Ni, Pb, Rb, Se, Sr, V, and Zn) in both flesh and peel of Wolfiporia extensa from seven sites of Yunnan province in China were determined by inductively coupled plasma mass spectrometer. The average recovery rates of certified reference materials for GBW10015 (spinach leaves) ranged from 90...
March 4, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28104342/effects-of-waste-water-irrigation-on-soil-properties-and-soil-fauna-of-spinach-fields-in-a-west-african-urban-vegetable-production-system
#16
Kathrin Stenchly, Juliane Dao, Désiré Jean-Pascal Lompo, Andreas Buerkert
The usage of inadequately processed industrial waste water (WW) can lead to strong soil alkalinity and soil salinization of agricultural fields with negative consequences on soil properties and biota. Gypsum as a soil amendment to saline-sodic soils is widely used in agricultural fields to improve their soil physical, chemical and hence biological properties. This study aimed at analysing the effects of intensive WW irrigation on the structure and composition of soil-dwelling arthropods on spinach fields (Spinacia oleracea L...
March 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28103687/live-cell-imaging-of-endogenous-mrna-using-rna-based-fluorescence-turn-on-probe
#17
Wei Qiang Ong, Y Rose Citron, Sayaka Sekine, Bo Huang
Messenger RNA (mRNA) plays a critical role in cellular growth and development. However, there have been limited methods available to visualize endogenous mRNA in living cells with ease. We have designed RNA-based fluorescence "turn-on" probes that target mRNA by fusing an unstable form of Spinach with target-complementary sequences. These probes have been demonstrated to be selective, stable, and capable of targeting various mRNAs for live E. coli imaging.
January 20, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28096887/thylakoids-reduce-body-fat-and-fat-cell-size-by-binding-to-dietary-fat-making-it-less-available-for-absorption-in-high-fat-fed-mice
#18
Karin G Stenkula, Eva-Lena Stenblom, Caroline Montelius, Emil Egecioglu, Charlotte Erlanson-Albertsson
BACKGROUND: Dietary thylakoids derived from spinach have beneficial effects on body fat accumulation and blood lipids as demonstrated in humans and rodents. Important mechanisms established include delayed fat digestion in the intestine, without causing steatorrhea, and increased fatty acid oxidation in intestinal cells. The objective of our study was to elucidate if increased fecal fat excretion is an important mechanism to normalize adipose tissue metabolism during high-fat feeding in mice supplemented with thylakoids...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28071016/the-antioxidant-and-phenolic-profiles-of-five-green-vegetables-grown-in-southern-nigeria
#19
Abiola M Adeosun, Osasenaga M Ighodaro, Abiola O Aminu, Aminat I Ogunlana
BACKGROUND: Regular consumption of vegetables has been associated with reduced risk of chronic diseases. The phenolic and free radical scavenging properties of five green vegetables grown in southern Nigeria were determined. METHODS: The phenolic and antioxidant profile of African spinach, bitter leaf, jute leaf, scent leaf and water leaf harvested in the month of August were assessed using standard protocols. RESULTS: The total phenolic content (GAE mg/100 g) of the fresh vegetables ranges from 738...
October 2016: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28054115/-risk-and-benefit-of-nutritional-supplements-for-the-treatment-of-postmenopausal-complaints
#20
Patrick Diel, Anne Kurrat, Christina Oden, Lars Hanke
Menopause is for many females associated with an occurrence of a variety of health complaints and a decrease in quality in life. Hot flashes, sleep disturbances and a variety of other symptoms result in a strong psychological strain. Hormone replacement therapy for treatment of climacteric complaints is discussed controversially regarding associated side effects. This is a major reason to propose treatment with plant derived extracts and compounds as an alternative. Such compounds are available either as drugs but mostly as nutritional supplements...
January 4, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
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