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https://www.readbyqxmd.com/read/28732132/entrapment-of-amino-acids-in-gas-phase-surfactant-assemblies-the-case-of-tryptophan-confined-in-positively-charged-1r-2s-dodecyl-2-hydroxy-1-methyl-2-phenylethyl-dimethylammonium-bromide-aggregates
#1
David Bongiorno, Valentina Calabrese, Leopoldo Ceraulo, Serena Indelicato, Vincenzo Turco Liveri
The ability of positively charged aggregates of the surfactant (1R,2S)-Dodecyl(2-hydroxy-1-methyl-2-phenylethyl)dimethylammonium bromide (DMEB) to incorporate D- or L-tryptophan in the gas-phase has been investigated by electrospray ion mobility mass spectrometry (ESI-IM-MS). Strongly impacted by the pH of the electrosprayed solutions, both protonated (T(+) ) and deprotonated (T(-) ) tryptophan are effectively included into the aggregates whereas, tryptophan in zwitterionic (T(0) ) form is practically absent in singly charged DMEB aggregates but can be found in multiply charged ones...
July 21, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28731744/quantum-zeno-suppression-of-intramolecular-forces
#2
S Wüster
We show that Born-Oppenheimer surfaces can intrinsically decohere, implying loss of coherence among constituent electronic basis states. We consider the example of interatomic forces due to resonant dipole-dipole interactions within a dimer of highly excited Rydberg atoms, embedded in an ultracold gas. These forces rely on a coherent superposition of two-atom electronic states, which is destroyed by continuous monitoring of the dimer state through a detection scheme utilizing the background gas atoms. We show that this intrinsic decoherence of the molecular energy surface can gradually deteriorate a repulsive dimer state, causing a mixing of attractive and repulsive character...
July 7, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28731691/singlet-oxygen-photophysics-in-liquid-solvents-converging-on-a-unified-picture
#3
Mikkel Bregnhøj, Michael Westberg, Boris F Minaev, Peter R Ogilby
Singlet oxygen, O2(a(1)Δg), the lowest excited electronic state of molecular oxygen, is an omnipresent part of life on earth. It is readily formed through a variety of chemical and photochemical processes, and its unique reactions are important not just as a tool in chemical syntheses but also in processes that range from polymer degradation to signaling in biological cells. For these reasons, O2(a(1)Δg) has been the subject of intense activity in a broad distribution of scientific fields for the past ∼50 years...
July 21, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28731598/comparison-of-malnutrition-inflammation-score-anthropometry-and-biochemical-parameters-in-assessing-the-difference-in-protein-energy-wasting-between-normal-weight-and-obese-patients-undergoing-haemodialysis
#4
Elham Alipoor, Mohammad Javad Hosseinzadeh-Attar, Mitra Mahdavi-Mazdeh, Mehdi Yaseri, Narges S Zahed
AIM: Protein-energy wasting (PEW) is prevalent in haemodialysis. Obesity is an independent risk factor of kidney insufficiency, but it is proposed to have beneficial roles in better outcomes in the final stage of disease. Better nutritional status and body reserves are among probable mechanisms, but direct examinations are limited. The present study aimed to investigate whether obese patients have preferable nutritional status compared to normal weight patients based on malnutrition inflammation score (MIS) and other PEW parameters in haemodialysis...
July 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28731562/relative-validity-of-a-brief-fat-and-fibre-behaviour-questionnaire-in-a-population-of-overweight-and-obese-breast-cancer-survivors-a-note-of-caution
#5
Megan E Whelan, Elisabeth A H Winkler, Elizabeth G Eakin, Marina M Reeves
AIM: Dietary intake assessment is often difficult in research contexts because of time and resource constraints and participant burden. Valid, reliable and brief assessments of dietary behaviour are needed. Additionally, examination of instrument performance in a variety of populations is needed. This study assessed relative validity and responsiveness to change of the Fat and Fibre Behaviour Questionnaire (FFBQ) in a population of breast cancer survivors compared with dietary intake measured by 24-hour recalls...
February 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28727738/propagation-characteristics-of-pulverized-coal-and-gas-two-phase-flow-during-an-outburst
#6
Aitao Zhou, Kai Wang, Lingpeng Fan, Bo Tao
Coal and gas outbursts are dynamic failures that can involve the ejection of thousands tons of pulverized coal, as well as considerable volumes of gas, into a limited working space within a short period. The two-phase flow of gas and pulverized coal that occurs during an outburst can lead to fatalities and destroy underground equipment. This article examines the interaction mechanism between pulverized coal and gas flow. Based on the role of gas expansion energy in the development stage of outbursts, a numerical simulation method is proposed for investigating the propagation characteristics of the two-phase flow...
2017: PloS One
https://www.readbyqxmd.com/read/28727249/dynamics-of-amino-acid-redistribution-in-the-carnivorous-venus-flytrap-dionaea-muscipula-after-digestion-of-13-c-15-n-labeled-prey
#7
Jörg Kruse, Peng Gao, Monika Eibelmeier, Saleh Alfarraj, Heinz Rennenberg
Amino acids represent an important component in the diet of the Venus flytrap (Dionaea muscipula), and supply plants with much needed nitrogen resources upon capture of insect prey. Little is known about the significance of prey-derived carbon backbones of amino acids for the success of Dionaea's carnivorous life-style. The present study tracked changes in plant amino acid pools and their δ(13) C- and δ(15) N-signatures, after half of all traps per plant had been fed with contrasting amounts of double-labeled insect powder (0, 5, 10 and 20 mg per trap)...
July 20, 2017: Plant Biology
https://www.readbyqxmd.com/read/28727247/acceptability-of-a-very-low-energy-diet-in-type-2-diabetes-patient-experiences-and-behaviour-regulation
#8
L Rehackova, V Araújo-Soares, A J Adamson, S Steven, R Taylor, F F Sniehotta
AIMS: To evaluate the acceptability of an 8-week very-low-energy diet for remission of Type 2 diabetes, and to identify the barriers and facilitators of adherence and the behavioural strategies used by participants of the Counterbalance study. METHODS: Eighteen of the 30 participants in the Counterbalance study (ISRCTN88634530) took part in semi-structured interviews. Of these, 15 participants were interviewed before and after the 8-week very-low-energy diet intervention...
July 20, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28727091/endogenous-fat-loss-and-true-total-tract-digestibility-of-poultry-fat-in-adult-dogs
#9
F R Marx, L Trevizan, F M O B Saad, K G Lisenko, J S Reis, A M Kessler
Fat plays an important role in the carnivore diet. It has high digestibility and high energy content and likely improves digestibility of the diet when present in greater amounts, suggesting that endogenous fat adversely affects the apparent digestibility of fat in low-fat diets. This study aimed to determine the endogenous fat loss (EFL) and true total tract digestibility (TTTD) of fat in dogs by using diets having different fat:carbohydrate ratios. Furthermore, the apparent total tract digestibility (ATTD) of macronutrients and energy, food intake, fecal output, and stool quality were evaluated...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727030/apparent-and-true-ileal-and-total-tract-digestibility-of-fat-in-canola-press-cake-or-canola-oil-and-effects-of-increasing-dietary-fat-on-amino-acid-and-energy-digestibility-in-growing-pigs
#10
X Zhou, E Beltranena, R T Zijlstra
Digestibility of remaining oil in canola press-cake (CPC) may be lower than that of extracted, liquid canola oil (CO) because oil may be partly entrapped in the CPC matrix. To determine true digestibility of fat in ingredients, endogenous fat losses should be estimated. Dietary fat may interact with digestion of other dietary components. To test these hypotheses, 10 ileal-cannulated pigs (initial BW, 25.4 kg) were fed 10 diets for 8 periods in a 10 × 8 Youden square. A basal diet was formulated based on wheat, barley, and canola meal...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727009/effects-of-energy-supplementation-on-energy-losses-and-nitrogen-balance-of-steers-fed-green-chopped-wheat-pasture-i-calorimetry
#11
A L Shreck, P J Ebert, E A Bailey, J S Jennings, K D Casey, B E Meyer, N A Cole
Cattle grazing wheat pasture in the southern Great Plains are sometimes fed an energy supplement; however, the benefits of supplementation on nutrient balance, energy metabolism, and greenhouse gas emissions have not been elucidated. Therefore, we used 10 British crossbred steers (206 ± 10.7 kg initial BW) in a respiration calorimetry study to evaluate the effects of energy supplementation on energy losses, N balance, and nutrient digestibility of steers fed green-chopped wheat forage. The study design was an incomplete replicated 4 × 4 Latin square with treatments in a 2 × 2 factorial arrangement...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727002/hourly-methane-production-in-finishing-steers-fed-at-different-levels-of-dry-matter-intake
#12
K E Hales, N A Cole
Methane (CH) loss from finishing cattle is important as it represents an energy loss that could be used for maintenance and growth, and CH is a greenhouse gas with a global warming potential 21 to 25 times that of CO. Our objectives were to determine hourly CH production from growing cattle fed diets differing in corn processing method (dry rolling or steam flaking) and wet distillers grains with solubles (WDGS) inclusion rate. Eight steers (195 kg ± 2.3 in Exp. 1 and 322 kg ± 3.7 in Exp. 2) were fed the following diets: 1) steam-flaked corn (SFC)-based diet with 0% WDGS (SFC-0); 2) SFC-based diet with 15% WDGS (SFC-15); 3) SFC-based diet with 30% WDGS (SFC-30); 4) SFC-based diet with 45% WDGS (SFC-45); 5) Dry-rolled corn DRC)-based diet with 0% WDGS (DRC-0); and 6) DRC-based diet with 30% WDGS (DRC-30)...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726652/investigation-of-bone-mineralization-in-patients-with-coronary-heart-disease-complicated-by-chronic-heart-failure-stage-ii-a
#13
I Krynytska, M Marushchak, T Zaets, I Savchenko, H Habor
The majority of the studies have shown that individuals with cardiovascular diseases have a higher risk of experiencing bone loss and thus greater predisposition to risk of fracture. On the other hand there is growing evidence that individuals with low bone mass have higher mortality for cardiovascular events compared to patients with cardiovascular disease with normal bone mass. This research aims to investigate bone mineralization in patients with coronary heart disease complicated by stage II-A chronic heart failure...
June 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28726640/c1q-tnf-related-protein-6-ctrp6-links-obesity-to-adipose-tissue-inflammation-and-insulin-resistance
#14
Xia Lei, Marcus M Seldin, Hannah C Little, Nicholas Choy, Thomas Klonisch, G William Wong
Obesity is associated with chronic low-grade inflammation, and metabolic regulators linking obesity to inflammation have therefore received much attention. Secreted C1q/TNF-related proteins (CTRPs) are one such group of regulators that regulate glucose and fat metabolism in peripheral tissues and modulate inflammation in adipose tissue. We have previously shown that expression of CTRP6 is up-regulated in leptin-deficient mice and, conversely, down-regulated by the anti-diabetic drug, rosiglitazone. Here, we provide evidence for a novel role of CTRP6 in modulating both inflammation and insulin sensitivity...
July 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28726639/mitochondrial-calcium-uniporter-in-drosophila-transfers-calcium-between-the-endoplasmic-reticulum-and-mitochondria-in-oxidative-stress-induced-cell-death
#15
Sekyu Choi, Xianglan Quan, Sunhoe Bang, Heesuk Yoo, Jiyoung Kim, Jiwon Park, Kyu-Sang Park, Jongkyeong Chung
Mitochondrial calcium plays critical roles in diverse cellular processes ranging from energy metabolism to cell death. Previous studies have demonstrated that mitochondrial calcium uptake is mainly mediated by the mitochondrial calcium uniporter (MCU) complex. However, the roles of the MCU complex in calcium transport, signaling, and dysregulation by oxidative stress still remain unclear. Here, we confirmed that Drosophila MCU contains evolutionarily conserved structures and requires essential MCU regulator (EMRE) for its calcium channel activities...
July 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28725334/bloch-surface-wave-coupled-emission-at-ultra-violet-wavelengths
#16
Ramachandram Badugu, Jieying Mao, Steve Blair, Douguo Zhang, Emiliano Descrovi, Angelo Angelini, Yiping Huo, Joseph R Lakowicz
The interaction of fluorophores with nearby metallic structures is now an active area of research. Dielectric photonic structures offer some advantages over plasmonic structures, namely small energy losses and less quenching. We describe a dielectric one-dimensional photonic crystal (1DPC), which supports Bloch surface waves (BSWs) from 280 to 440 nm. This BSW structure is a quartz slide coated with alternating layers of SiO2 and Si3N4. We show that this structure displays BSWs and that the near-UV fluorophore, 2-aminopurine (2-AP), on the top surface of the structure couples with the BSWs...
December 22, 2016: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/28725014/su-schrieffer-heeger-chain-with-one-pair-of-formula-see-text-symmetric-defects
#17
L Jin, P Wang, Z Song
The topologically nontrivial edge states induce [Formula: see text] transition in Su-Schrieffer-Heeger (SSH) chain with one pair of gain and loss at boundaries. In this study, we investigated a pair of [Formula: see text]-symmetric defects located inside the SSH chain, in particular, the defects locations are at the chain centre. The [Formula: see text] symmetry breaking of the bound states leads to the [Formula: see text] transition, the [Formula: see text]-symmetric phases and the localized states were studied...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724989/impact-of-interfacial-molecular-orientation-on-radiative-recombination-and-charge-generation-efficiency
#18
Niva A Ran, Steffen Roland, John A Love, Victoria Savikhin, Christopher J Takacs, Yao-Tsung Fu, Hong Li, Veaceslav Coropceanu, Xiaofeng Liu, Jean-Luc Brédas, Guillermo C Bazan, Michael F Toney, Dieter Neher, Thuc-Quyen Nguyen
A long standing question in organic electronics concerns the effects of molecular orientation at donor/acceptor heterojunctions. Given a well-controlled donor/acceptor bilayer system, we uncover the genuine effects of molecular orientation on charge generation and recombination. These effects are studied through the point of view of photovoltaics-however, the results have important implications on the operation of all optoelectronic devices with donor/acceptor interfaces, such as light emitting diodes and photodetectors...
July 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28724285/elucidating-potential-energy-surfaces-for-singlet-o2-reactions-with-protonated-deprotonated-and-di-deprotonated-cystine-using-a-combination-of-approximately-spin-projected-density-functional-theory-and-guided-ion-beam-mass-spectrometry
#19
Wenchao Lu, I-Hsien Midas Tsai, Yan Sun, Wenjing Zhou, Jianbo Liu
The reactivity of cystine towards electronically excited singlet O2 (a(1)Δg) has been long debated, despite the fact that most organic disulfides are susceptible to oxidation by singlet O2. We report a combined experimental and computational study on reactions of singlet O2 with gas-phase cystine at different ionization and hydration states, aimed to determine reaction outcomes, mechanisms and potential energy surfaces. Ion-molecule collisions of protonated and di-deprotonated cystine ions with (1)O2, in both the absence and the presence of a water ligand, were measured over a center-of-mass collision energy (Ecol) range from 0...
July 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28723568/loss-of-hepatic-mitochondrial-long-chain-fatty-acid-oxidation-confers-resistance-to-diet-induced-obesity-and-glucose-intolerance
#20
Jieun Lee, Joseph Choi, Ebru S Selen Alpergin, Liang Zhao, Thomas Hartung, Susanna Scafidi, Ryan C Riddle, Michael J Wolfgang
The liver has a large capacity for mitochondrial fatty acid β-oxidation, which is critical for systemic metabolic adaptations such as gluconeogenesis and ketogenesis. To understand the role of hepatic fatty acid oxidation in response to a chronic high-fat diet (HFD), we generated mice with a liver-specific deficiency of mitochondrial long-chain fatty acid β-oxidation (Cpt2(L-/-) mice). Paradoxically, Cpt2(L-/-) mice were resistant to HFD-induced obesity and glucose intolerance with an absence of liver damage, although they exhibited serum dyslipidemia, hepatic oxidative stress, and systemic carnitine deficiency...
July 18, 2017: Cell Reports
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