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https://www.readbyqxmd.com/read/28934290/the-oldest-known-digestive-system-consisting-of-both-paired-digestive-glands-and-a-crop-from-exceptionally-preserved-trilobites-of-the-guanshan-biota-early-cambrian-china
#1
Melanie J Hopkins, Feiyang Chen, Shixue Hu, Zhifei Zhang
The early Cambrian Guanshan biota of eastern Yunnan, China, contains exceptionally preserved animals and algae. Most diverse and abundant are the arthropods, of which there are at least 11 species of trilobites represented by numerous specimens. Many trilobite specimens show soft-body preservation via iron oxide pseudomorphs of pyrite replacement. Here we describe digestive structures from two species of trilobite, Palaeolenus lantenoisi and Redlichia mansuyi. Multiple specimens of both species contain the preserved remains of an expanded stomach region (a "crop") under the glabella, a structure which has not been observed in trilobites this old, despite numerous examples of trilobite gut traces from other Cambrian Lagerstätten...
2017: PloS One
https://www.readbyqxmd.com/read/28933773/rapid-quantification-of-major-volatile-metabolites-in-fermented-food-and-beverages-using-gas-chromatography-mass-spectrometry
#2
Farhana R Pinu, Silas G Villas-Boas
Here we present a method for the accurate quantification of major volatile metabolites found in different food and beverages, including ethanol, acetic acid and other aroma compounds, using gas chromatography coupled to mass spectrometry (GC-MS). The method is combined with a simple sample preparation procedure using sodium chloride and anhydrous ethyl acetate. The GC-MS analysis was accomplished within 4.75 min, and over 80 features were detected, of which 40 were positively identified using an in-house and a commercialmass spectrometry (MS) library...
July 26, 2017: Metabolites
https://www.readbyqxmd.com/read/28932870/ablation-of-kallikrein-7-klk7-in-adipose-tissue-ameliorates-metabolic-consequences-of-high%C3%A2-fat-diet-induced-obesity-by-counteracting-adipose-tissue-inflammation-in-vivo
#3
Konstanze Zieger, Juliane Weiner, Anne Kunath, Martin Gericke, Kerstin Krause, Matthias Kern, Michael Stumvoll, Nora Klöting, Matthias Blüher, John T Heiker
Vaspin is an adipokine which improves glucose metabolism and insulin sensitivity in obesity. Kallikrein 7 (KLK7) is the first known protease target inhibited by vaspin and a potential target for the treatment of metabolic disorders. Here, we tested the hypothesis that inhibition of KLK7 in adipose tissue may beneficially affect glucose metabolism and adipose tissue function. Therefore, we have inactivated the Klk7 gene in adipose tissue using conditional gene-targeting strategies in mice. Klk7-deficient mice (ATKlk7 (-/-)) exhibited less weight gain, predominant expansion of subcutaneous adipose tissue and improved whole body insulin sensitivity under a high fat diet (HFD)...
September 20, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28932265/removal-of-glucuronic-acid-from-xylan-is-a-strategy-to-improve-the-conversion-of-plant-biomass-to-sugars-for-bioenergy
#4
Jan J Lyczakowski, Krzysztof B Wicher, Oliver M Terrett, Nuno Faria-Blanc, Xiaolan Yu, David Brown, Kristian B R M Krogh, Paul Dupree, Marta Busse-Wicher
BACKGROUND: Plant lignocellulosic biomass can be a source of fermentable sugars for the production of second generation biofuels and biochemicals. The recalcitrance of this plant material is one of the major obstacles in its conversion into sugars. Biomass is primarily composed of secondary cell walls, which is made of cellulose, hemicelluloses and lignin. Xylan, a hemicellulose, binds to the cellulose microfibril and is hypothesised to form an interface between lignin and cellulose. Both softwood and hardwood xylan carry glucuronic acid side branches...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28931949/hydrothermal-activity-functional-diversity-and-chemoautotrophy-are-major-drivers-of-seafloor-carbon-cycling
#5
James B Bell, Clare Woulds, Dick van Oevelen
Hydrothermal vents are highly dynamic ecosystems and are unusually energy rich in the deep-sea. In situ hydrothermal-based productivity combined with sinking photosynthetic organic matter in a soft-sediment setting creates geochemically diverse environments, which remain poorly studied. Here, we use comprehensive set of new and existing field observations to develop a quantitative ecosystem model of a deep-sea chemosynthetic ecosystem from the most southerly hydrothermal vent system known. We find evidence of chemosynthetic production supplementing the metazoan food web both at vent sites and elsewhere in the Bransfield Strait...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931728/fish-face-a-trade-off-between-eating-big-for-growth-efficiency-and-eating-small-to-retain-aerobic-capacity
#6
Tommy Norin, Timothy D Clark
Feeding provides the necessary energy to fuel all fitness-related processes including activity, growth and reproduction. Nevertheless, prey consumption and digestive processes can have physical and physiological trade-offs with other critical functions, many of which are not clearly understood. Using an ambush predator, barramundi (Lates calcarifer), fed meals ranging 0.6-3.4% of body mass, we examined interrelations between meal size, growth efficiency and surplus aerobic metabolic capacity (aerobic scope, AS)...
September 2017: Biology Letters
https://www.readbyqxmd.com/read/28931384/early-food-for-future-health-a-randomized-controlled-trial-evaluating-the-effect-of-an-ehealth-intervention-aiming-to-promote-healthy-food-habits-from-early-childhood
#7
Christine Helle, Elisabet Rudjord Hillesund, Mona Linge Omholt, Nina Cecilie Øverby
BACKGROUND: Childhood overweight and obesity is a global public health challenge. Primary prevention initiatives targeting parents have been called for to encourage a positive feeding environment and healthy eating habits that may lay a good foundation for future health. At the same time, there is a need for interventions which combine accessibility and scalability with cost effectiveness. Today's parents are extensive Internet-users, but only a few randomized controlled trials have investigated the use of Internet to promote healthy eating habits in early childhood...
September 20, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28931084/barcoding-snakeheads-teleostei-channidae-revisited-discovering-greater-species-diversity-and-resolving-perpetuated-taxonomic-confusions
#8
Cecilia Conte-Grand, Ralf Britz, Neelesh Dahanukar, Rajeev Raghavan, Rohan Pethiyagoda, Heok Hui Tan, Renny K Hadiaty, Norsham S Yaakob, Lukas Rüber
Snakehead fishes of the family Channidae are predatory freshwater teleosts from Africa and Asia comprising 38 valid species. Snakeheads are important food fishes (aquaculture, live food trade) and have been introduced widely with several species becoming highly invasive. A channid barcode library was recently assembled by Serrao and co-workers to better detect and identify potential and established invasive snakehead species outside their native range. Comparing our own recent phylogenetic results of this taxonomically confusing group with those previously reported revealed several inconsistencies that prompted us to expand and improve on previous studies...
2017: PloS One
https://www.readbyqxmd.com/read/28930272/antimicrobial-activity-of-some-essential-oils-present-status-and-future-perspectives
#9
REVIEW
Sonam Chouhan, Kanika Sharma, Sanjay Guleria
Extensive documentation on the antimicrobial properties of essential oils and their constituents has been carried out by several workers. Although the mechanism of action of a few essential oil components has been elucidated in many pioneering works in the past, detailed knowledge of most of the compounds and their mechanism of action is still lacking. This knowledge is particularly important for the determination of the effect of essential oils on different microorganisms, how they work in combination with other antimicrobial compounds, and their interaction with food matrix components...
August 8, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28929768/protein-corona-analysis-of-silver-nanoparticles-links-to-their-cellular-effects
#10
Sabine Juling, Alicia Niedzwiecka, Linda Böhmert, Dajana Lichtenstein, Soeren Selve, Albert Braeuning, Andreas F Thünemann, Eberhard Krause, Alfonso Lampen
The breadth of applications of nanoparticles and the access to food-associated consumer products containing nano-sized materials lead to oral human exposure to such particles. In biological fluids nanoparticles dynamically interact with biomolecules and form a protein corona. Knowledge about the protein corona is of great interest for understanding the molecular effects of particles as well as their fate inside the human body. We used a mass spectrometry-based toxicoproteomics approach to elucidate mechanisms of toxicity of silver nanoparticles and to comprehensively characterize the protein corona formed around silver nanoparticles in Caco-2 human intestinal epithelial cells...
September 20, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28929574/metabolite-and-transcript-markers-for-the-prediction-of-potato-drought-tolerance
#11
Heike Sprenger, Alexander Erban, Sylvia Seddig, Katharina Rudack, Anja Thalhammer, Mai Q Le, Dirk Walther, Ellen Zuther, Karin I Köhl, Joachim Kopka, Dirk K Hincha
Potato (Solanum tuberosum L.) is one of the most important food crops worldwide. Current potato varieties are highly susceptible to drought stress. In view of global climate change, selection of cultivars with improved drought tolerance and high yield potential is of paramount importance. Drought tolerance breeding of potato is currently based on direct selection according to yield and phenotypic traits and requires multiple trials under drought conditions. Marker-assisted selection (MAS) is cheaper, faster and reduces classification errors caused by non-controlled environmental effects...
September 20, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28928663/comparison-of-the-bioactive-components-in-two-seeds-of-ziziphus-species-by-different-analytical-approaches-combined-with-chemometrics
#12
Sheng Guo, Jin-Ao Duan, Yiqun Li, Ruiqing Wang, Hui Yan, Dawei Qian, Yuping Tang, Shulan Su
The Ziziphus species are considered to be the medicine and food dual purposes plants. Among them, the seed of Ziziphus jujuba var. spinosa (ZS) has traditionally been used as an ethnomedicine in Asian countries for thousands years. Owing to the significant benefits for human health, the demand for ZS increased year by year, and the wild resources have become increasingly scarce, which resulted in a shortage of market supply for ZS and product adulteration by substituting ZS with the seeds of Z. mauritiana Lam...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28928364/male-male-lethal-combat-in-the-quasi-gregarious-parasitoid-anastatus-disparis-hymenoptera-eupelmidae
#13
Peng-Cheng Liu, Jian-Rong Wei, Shuo Tian, De-Jun Hao
Most animals employ aggressive behaviours to acquire resources such as food, territory and mates. Although mating is important for males, which typically exhibit competitive behaviours to gain mating opportunities, they generally tend to avoid conflict escalation; while extreme combat also occurs in some species and results in death. In this study, male-male lethal combat behaviour in Anastatus disparis was examined (Hymenoptera: Eupelmidae) by investigating the characteristics of fighting and the factors that influence fighting intensity in this species...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28927896/niacin-and-heart-disease-prevention-engraving-its-tombstone-is-a-mistake
#14
REVIEW
Harold Robert Superko, Xue-Qiao Zhao, Howard N Hodis, John R Guyton
Niacin (nicotinic acid) has been used for primary and secondary coronary heart disease prevention for over 40 years. Until recently clinical trials incorporating niacin as part of an intervention strategy consistently demonstrated reduction in clinical events and lesion improvement, including ≥6% absolute mortality reduction. Two large clinical event trials in 2011 (Atherothrombosis Intervention in Metabolic Syndrome With Low HDL/High Triglycerides and Impact on Global Health Outcomes) and 2014 (Heart Protection Study 2-Treatment of HDL to Reduce the Incidence of Vascular Events) concluded that niacin added to statin therapy did not provide clinical event benefit over statin alone...
August 24, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28927629/insight-into-the-interaction-between-chitosan-and-bovine-serum-albumin
#15
Guo Li, Jianying Huang, Tao Chen, Xiangyang Wang, Haijiang Zhang, Qing Chen
Exploiting the uses of proteins and polysaccharides is of increasing interest because the combination of the attributes of these two types of biopolymers can produce small emulsion droplets with good physical stability. The objective of this study was to evaluate the effect of adding chitosan to a bovine serum albumin (BSA) solution at different pH values, and the consequent conformational changes were monitored using UV-vis absorption spectroscopy and fluorescence spectroscopy. Spectroscopic observations were further combined with rheological analysis results to illustrate the interaction mechanism...
November 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28926767/stabilization-of-t4-bacteriophage-at-acidic-and-basic-ph-by-adsorption-on-paper
#16
Abigail Meyer, Melissa Greene, Chad Kimmelshue, Rebecca Cademartiri
Bacteriophages find applications in agriculture, medicine, and food safety. Many of these applications can expose bacteriophages to stresses that inactivate them including acidic and basic pH. Bacteriophages can be stabilized against these stresses by materials including paper, a common material in packaging and consumer products. Combining paper and bacteriophages creates antibacterial materials, which can reduce the use of antibiotics. Here we show that adsorption on paper protects T4, T5, and T7 bacteriophage from acidic and basic pH...
September 5, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28925409/metabolic-and-genomic-adaptations-to-winter-fattening-in-a-primate-species-the-grey-mouse-lemur-microcebus-murinus
#17
J Terrien, M Gaudubois, D Champeval, V Zaninotto, L Roger, J F Riou, F Aujard
AIM: To understand the mechanisms underlying the development of metabolic changes leading to obesity remains a major world health issue. Among such mechanisms, seasonality is quite underestimated although it corresponds to the manifestation of extreme metabolic flexibility in response to a changing environment. Nevertheless, the changes induced by such flexibility are far to be understood, especially at the level of insulin signaling, genomic stability or inflammation. METHODS: Here, we investigated the metabolic regulations displayed by a seasonal primate species, the grey mouse lemur (Microcebus murinus) that exhibits pronounced changes in body mass during the 6-month winter season: a fattening period followed by a spontaneous fat loss, without ever reaching pathological stages...
August 14, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28925349/real-time-genomic-investigation-underlying-the-public-health-response-to-a-shiga-toxin-producing-escherichia-coli-o26-h11-outbreak-in-a-nursery
#18
J Moran-Gilad, A Rokney, D Danino, M Ferdous, F Alsana, M Baum, L Dukhan, V Agmon, E Anuka, L Valinsky, R Yishay, I Grotto, J W A Rossen, M Gdalevich
Shiga toxin-producing Escherichia coli (STEC) is a significant cause of gastrointestinal infection and the haemolytic-uremic syndrome (HUS). STEC outbreaks are commonly associated with food but animal contact is increasingly being implicated in its transmission. We report an outbreak of STEC affecting young infants at a nursery in a rural community (three HUS cases, one definite case, one probable case, three possible cases and five carriers, based on the combination of clinical, epidemiological and laboratory data) identified using culture-based and molecular techniques...
September 19, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28925107/formulation-of-long-wavelength-indocyanine-green-nanocarriers
#19
Vikram J Pansare, William J Faenza, Hoang Lu, Douglas H Adamson, Robert K Prud'homme
Indocyanine green (ICG), a Food and Drug Administration (FDA)-approved fluorophore with excitation and emission wavelengths inside the "optical imaging window," has been incorporated into nanocarriers (NCs) to achieve enhanced circulation time, targeting, and real-time tracking in vivo. While previous studies transferred ICG exogenously into NCs, here, a one-step rapid precipitation process [flash nanoprecipitation (FNP)] creates ICG-loaded NCs with tunable, narrow size distributions from 30 to 180 nm. A hydrophobic ion pair of ICG-tetraoctylammonium or tetradodecylammonium chloride is formed either in situ during FNP or preformed then introduced into the FNP feed stream...
September 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28925036/combining-food-based-dietary-recommendations-using-optifood-with-zinc-fortified-water-potentially-improves-nutrient-adequacy-among-4-to-6-year-old-children-in-kisumu-west-district-kenya
#20
Prosper Kujinga, Karin J Borgonjen-van den Berg, Cecilia Superchi, Hermine J Ten Hove, Elizabeth Opiyo Onyango, Pauline Andang'o, Valeria Galetti, Michael B Zimmerman, Diego Moretti, Inge D Brouwer
Children in developing countries often face multiple micronutrient deficiencies. Introduction of zinc-fortified water can increase zinc intake, but additional recommendations are required to address overall diet nutrient adequacy. We developed and tested food-based recommendations (FBRs) that included zinc-fortified water for children aged between 4 and 6 years from rural Kenya to achieve the best possible nutrient adequacy. Dietary intakes of 60 children aged 4-6 years, from Kisumu West district, Kenya, were assessed using a quantitative multipass 24-hr recall...
September 19, 2017: Maternal & Child Nutrition
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