keyword
MENU ▼
Read by QxMD icon Read
search

Food systems

keyword
https://www.readbyqxmd.com/read/29150714/stochastic-lotka-volterra-food-chains
#1
Alexandru Hening, Dang H Nguyen
We study the persistence and extinction of species in a simple food chain that is modelled by a Lotka-Volterra system with environmental stochasticity. There exist sharp results for deterministic Lotka-Volterra systems in the literature but few for their stochastic counterparts. The food chain we analyze consists of one prey and [Formula: see text] predators. The jth predator eats the [Formula: see text]th species and is eaten by the [Formula: see text]th predator; this way each species only interacts with at most two other species-the ones that are immediately above or below it in the trophic chain...
November 17, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/29150643/%C3%AE-eudesmol-an-oxygenized-sesquiterpene-stimulates-appetite-via-trpa1-and-the-autonomic-nervous-system
#2
Kazuaki Ohara, Takafumi Fukuda, Yuko Ishida, Chika Takahashi, Rena Ohya, Mikio Katayama, Kunitoshi Uchida, Makoto Tominaga, Katsuya Nagai
Transient receptor potential ankyrin 1 (TRPA1) is a calcium-permeable non-selective cation channel, which is activated by various noxious or irritant substances in nature. TRPA1 activators have been generally recognized as noxious, however, foods and beverages containing TRPA1 activators are preferably consumed; the reasons for this discrepancy are not well understood. We demonstrate that TRPA1 is involved in the stimulatory appetite control mechanism. β-Eudesmol is an oxygenated sesquiterpene contained in medicinal or edible plants which activates TRPA1...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150472/are-food-and-drink-retailers-within-nhs-venues-adhering-to-nice-quality-standard-94-guidance-on-childhood-obesity-a-cross-sectional-study-of-two-large-secondary-care-nhs-hospitals-in-england
#3
Alice James, Laura Birch, Peter Fletcher, Sally Pearson, Catherine Boyce, Andy R Ness, Julian P Hamilton-Shield, Fiona E Lithander
OBJECTIVE: To assess whether the food and drink retail outlets in two major National Health Service (NHS) district general hospitals in England adhere to quality statements 1-3 of the UK National Institute for Health and Care Excellence (NICE) quality standard 94. DESIGN: Cross-sectional, descriptive study to assess the food and drink options available in vending machines, restaurants, cafes and shops in two secondary care hospitals. MAIN OUTCOME MEASURES: Adherence to quality statement 1 whereby the food and drink items available in the vending machines were classified as either healthy or less healthy using the Nutrient Profiling Model (NPM)...
November 16, 2017: BMJ Open
https://www.readbyqxmd.com/read/29149758/oligotrophy-as-a-major-driver-of-mercury-bioaccumulation-in-medium-to-high-trophic-level-consumers-a-marine-ecosystem-comparative-study
#4
Tiphaine Chouvelon, Pierre Cresson, Marc Bouchoucha, Christophe Brach-Papa, Paco Bustamante, Sylvette Crochet, Françoise Marco-Miralles, Bastien Thomas, Joël Knoery
Mercury (Hg) is a global contaminant of environmental concern. Numerous factors influencing its bioaccumulation in marine organisms have already been described at both individual and species levels (e.g., size or age, habitat, trophic level). However, few studies have compared the trophic characteristics of ecosystems to explain underlying mechanisms of differences in Hg bioaccumulation and biomagnification among food webs and systems. The present study aimed at investigating the potential primary role of the trophic status of systems on Hg bioaccumulation and biomagnification in temperate marine food webs, as shown by their medium-to high-trophic level consumers...
November 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29149660/a-systems-level-approach-for-investigating-organophosphorus-pesticide-toxicity
#5
Jingbo Zhu, Jing Wang, Yan Ding, Baoyue Liu, Wei Xiao
The full understanding of the single and joint toxicity of a variety of organophosphorus (OP) pesticides is still unavailable, because of the extreme complex mechanism of action. This study established a systems-level approach based on systems toxicology to investigate OP pesticide toxicity by incorporating ADME/T properties, protein prediction, and network and pathway analysis. The results showed that most OP pesticides are highly toxic according to the ADME/T parameters, and can interact with significant receptor proteins to cooperatively lead to various diseases by the established OP pesticide -protein and protein-disease networks...
November 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29149262/a-food-environments-feedback-system-foodback-for-empowering-citizens-and-change-agents-to-create-healthier-community-food-places
#6
Stefanie Vandevijvere, Rachel Williams, Essa Tawfiq, Boyd Swinburn
This study developed a systems-based approach (called FoodBack) to empower citizens and change agents to create healthier community food places. Formative evaluations were held with citizens and change agents in six diverse New Zealand communities, supplemented by semi-structured interviews with 85 change agents in Auckland and Hamilton in 2015-2016. The emerging system was additionally reviewed by public health experts from diverse organizations. A food environments feedback system was constructed to crowdsource key indicators of the healthiness of diverse community food places (i...
November 14, 2017: Health Promotion International
https://www.readbyqxmd.com/read/29149170/vibrio-parahaemolyticus-vtra-is-a-membrane-bound-regulator-and-is-activated-via-oligomerization
#7
Ryu Okada, Shigeaki Matsuda, Tetsuya Iida
Vibrio parahaemolyticus is a Gram-negative pathogen that causes food-borne gastroenteritis. A major virulence determinant of the organism is a type III secretion system (T3SS2) encoded on a pathogenicity island, Vp-PAI. Vp-PAI gene expression is regulated by two transcriptional regulators, VtrA and VtrB, whose N-terminal regions share homology with an OmpR-family DNA-binding domain. VtrA activates the gene expression of VtrB, which in turn activates Vp-PAI gene expression; however, the mechanism of this transcriptional activation by VtrA is not well understood...
2017: PloS One
https://www.readbyqxmd.com/read/29149148/current-impact-and-application-of-abuse-deterrent-opioid-formulations-in-clinical-practice
#8
Ya-Han Lee, Daniel L Brown, Hsiang-Yin Chen
BACKGROUND: Abuse-deterrent formulations (ADFs) represent one novel strategy for curbing the potential of opioid abuse. OBJECTIVE: We aim to compare and contrast the characteristics and applications of current abuse-deterrent opioid products in clinical practice. METHODS: Literature searches were conducted in databases (Pubmed Medline, International Pharmaceutical Abstracts, Google Scholar) and official reports. Relevant data were screened and organized into: 1) epidemiology of opioid abuse, 2) mitigation strategies for reducing opioid abuse, 3) development of ADFs, and 4) clinical experience with these formulations...
November 2017: Pain Physician
https://www.readbyqxmd.com/read/29148058/classification-of-consumer-products-under-the-eu-clp-regulation-what-to-consider-when-caring-for-contact-dermatitis-patients
#9
REVIEW
Peter Elsner
Possibly hazardous chemical substances and mixtures need to be clearly and correctly classified and labelled, in order for their hazards to be properly identified and communicated. As dermatologists may encounter cases of harm to patients induced by chemicals, such as chemical burns, and irritant and allergic contact dermatitis, it is essential for them to be aware of the EU CLP Regulation and its potential pitfalls. Manufacturers are required by CLP to classify their products according to the rules given in the CLP Regulation...
November 17, 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/29147950/mental-health-consultation-among-ontario-s-immigrant-populations
#10
Farah Islam, Nazilla Khanlou, Alison Macpherson, Hala Tamim
To determine the prevalence rates and characteristics of past-year mental health consultation for Ontario's adult (18 + years old) immigrant populations. The Canadian Community Health Survey (CCHS) 2012 was used to calculate the prevalence rates of past-year mental health consultation by service provider type. Characteristics associated with mental health consultation were determined by carrying out multivariable logistic regression analysis on merged CCHS 2008-2012 data. Adult immigrant populations in Ontario (n = 3995) had lower estimated prevalence rates of past-year mental health consultation across all service provider types compared to Canadian-born populations (n = 14,644)...
November 16, 2017: Community Mental Health Journal
https://www.readbyqxmd.com/read/29147628/trial-watch-adoptively-transferred-cells-for-anticancer-immunotherapy
#11
REVIEW
Carole Fournier, François Martin, Laurence Zitvogel, Guido Kroemer, Lorenzo Galluzzi, Lionel Apetoh
Immunotherapies aimed at strengthening immune effector responses against malignant cells are growing at exponential rates. Alongside, the impressive benefits obtained by patients with advanced melanoma who received adoptively transferred tumor-infiltrating lymphocytes (TILs) have encouraged the scientific community to pursue adoptive cell transfer (ACT)-based immunotherapy. ACT involves autologous or allogenic effector lymphocytes that are generally obtained from the peripheral blood or resected tumors, expanded and activated ex vivo, and administered to lymphodepleted patients...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29146932/activation-of-endogenous-arginine-vasopressin-neurons-inhibit-food-intake-by-using-a-novel-transgenic-rat-line-with-dreadds-system
#12
Mitsuhiro Yoshimura, Kazuaki Nishimura, Haruki Nishimura, Satomi Sonoda, Hiromichi Ueno, Yasuhito Motojima, Reiko Saito, Takashi Maruyama, Yuki Nonaka, Yoichi Ueta
Various studies contributed to discover novel mechanisms of central arginine vasopressin (AVP) system responsible for the behaviour albeit endogenous vasopressin activation. We established a novel transgenic rat line which expresses both human muscarinic acetylcholine receptors (hM3Dq), of which ligand is clozapine-N-oxide (CNO), and mCherry fluorescence specifically in AVP neurons. The mCherry neurons that indicate the expression of the hM3Dq gene were observed in the suprachiasmatic (SCN), supraoptic (SON), and paraventricular nuclei (PVN)...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146657/a-randomised-controlled-trial-of-a-duodenal-jejunal-bypass-sleeve-device-endobarrier-compared-with-standard-medical-therapy-for-the-management-of-obese-subjects-with-type-2-diabetes-mellitus
#13
Michael Alan Glaysher, Aruchuna Mohanaruban, Christina Gabriele Prechtl, Anthony P Goldstone, Alexander Dimitri Miras, Joanne Lord, Navpreet Chhina, Emanuela Falaschetti, Nicholas Andrew Johnson, Werd Al-Najim, Claire Smith, Jia V Li, Mayank Patel, Ahmed R Ahmed, Michael Moore, Neil Poulter, Stephen Bloom, Ara Darzi, Carel Le Roux, James P Byrne, Julian P Teare
INTRODUCTION: The prevalence of obesity and obesity-related diseases, including type 2 diabetes mellitus (T2DM), is increasing. Exclusion of the foregut, as occurs in Roux-en-Y gastric bypass, has a key role in the metabolic improvements that occur following bariatric surgery, which are independent of weight loss. Endoscopically placed duodenal-jejunal bypass sleeve devices, such as the EndoBarrier (GI Dynamics, Lexington, Massachusetts, USA), have been designed to create an impermeable barrier between chyme exiting the stomach and the mucosa of the duodenum and proximal jejunum...
November 15, 2017: BMJ Open
https://www.readbyqxmd.com/read/29146502/protracted-motivational-dopamine-related-deficits-following-adolescence-sugar-overconsumption
#14
Fabien Naneix, Florence Darlot, Véronique De Smedt-Peyrusse, Jean-Rémi Pape, Etienne Coutureau, Martine Cador
Adolescence represents a critical period characterized by major neurobiological changes. Chronic stimulation of the reward system during adolescence might constitute an important factor of vulnerability to pathological development. Increasing evidences suggest that adolescent overconsumption of sweet palatable foods impact reward-based processes. However, the neurobiological bases of these deficits remain poorly understood. Previous studies have demonstrated motivational deficits for palatable foods after sweet diet exposure during adolescence that might involve the dopamine (DA) system, a central actor in incentive processes...
November 13, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29146373/development-and-validation-of-a-fallow-deer-dama-dama-specific-taqman-real-time-pcr-assay-for-the-detection-of-food-adulteration
#15
Maria Kaltenbrunner, Rupert Hochegger, Margit Cichna-Markl
The aim of the present study was to develop a real-time PCR assay for the identification and quantification of fallow deer (Dama dama) in food to detect food adulteration. Despite high sequence homology among different deer species, a fallow deer-specific primer/probe system targeting a fragment of the nuclear MC1-R gene was designed. This primer/probe system did not amplify DNA from 19 other animals and 50 edible plant species. Moderate cross-reactivity was observed for sika deer, red deer, roe deer, reindeer and wild boar...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29146372/interactions-of-cinnamaldehyde-and-its-metabolite-cinnamic-acid-with-human-serum-albumin-and-interference-of-other-food-additives
#16
Qiaomei Sun, Hongqin Yang, Peixiao Tang, Jiuyang Liu, Wan Wang, Hui Li
Considering the adverse effect of food additives on humans, thorough research of their physiological effects at the molecular level is important. The interactions of cinnamaldehyde (CNMA), a food perfume, and its major metabolite cinnamic acid (CA) with human serum albumin (HSA) were examined by multiple-spectroscopies. NMR analysis revealed CNMA and CA both bound to HSA, and STD-NMR experiments established CNMA and CA primarily interacted with site I and site II of HSA, respectively. The ligands caused strong quenching of HSA fluorescence through a static quenching mechanism, with hydrophobic and electrostatic interaction between CNMA/CA and HSA, respectively...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29146361/rheological-characterization-of-gum-and-starch-nanoparticle-blends
#17
Mariana Perez Herrera, Thava Vasanthan
Commercial interest on the application of starch nanoparticles (SNP) in food is rapidly growing. Since gums are commonly used in food processing for their texturizing functionality, it is important to understand the influence of SNP on gum rheology. λ-Carrageenan and xanthan gum were selected in this study due to their wide range of applications in food systems. SNP isolated from waxy (0% amylose) and high amylose maize (71% amylose) were used. Binary blends consisting of 0.5% (w/v) gum and different concentrations of SNP were prepared and their flow behaviors evaluated using a rheometer...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29146320/the-functional-properties-of-chitosan-glucose-asparagine-maillard-reaction-products-and-mitigation-of-acrylamide-formation-by-chitosans
#18
Wen-Chieh Sung, Yu-Wei Chang, Yu-Hao Chou, Hsin-I Hsiao
This research aims to clarify the interactions that occur in a food model system consisting of glucose, asparagine and chitosans. Low molecular weight chitosan exerted a potent inhibitory effect (46.8%) on acrylamide and Maillard reaction products (MRPs) (>52.6%), respectively. Compared to a previous study conducted using the fructose system, the novel findings of this research demonstrate that the formation of acrylamide and Maillard reaction products was lower with glucose than with fructose when they were used as reducing sugars in food model systems...
March 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29145897/it-does-matter-where-you-come-from-mothers-experiences-of-childbirth-in-midwife-obstetric-units-tshwane-south-africa
#19
Sarie J Oosthuizen, Anne-Marie Bergh, Robert C Pattinson, Jackie Grimbeek
BACKGROUND: Health professionals are striving to improve respectful care for women, but they fall short in the domains of effective communication, respectful and dignified care and emotional support during labour. This study aimed to determine women's experiences of childbirth with a view to improving respectful clinical care practices in low-risk, midwife-led obstetric units in the Tshwane District Health District, South Africa. METHODS: A survey covering all midwife-led units in the district was conducted among 653 new mothers...
November 16, 2017: Reproductive Health
https://www.readbyqxmd.com/read/29145569/immune-system-an-emerging-player-in-mediating-effects-of-endocrine-disruptors-on-metabolic-health
#20
Amita Bansal, Jorge Henao Mejia, Rebecca A Simmons
The incidence of metabolic disorders like type 2 diabetes and obesity continue to increase. In addition to the well-known contributors such as food intake and sedentary lifestyle, recent research in the exposure science discipline provides new evidence that exposure to endocrine disrupting chemicals like bisphenol A and phthalates via multiple routes (food, drink and skin contact) also contribute to the increased risk of metabolic disorders. Endocrine disrupting chemicals (EDCs) can disrupt any aspect of hormone action...
November 14, 2017: Endocrinology
keyword
keyword
105364
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"