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https://www.readbyqxmd.com/read/28231150/enhancing-the-total-phenolic-content-and-antioxidants-of-lemon-pomace-aqueous-extracts-by-applying-uv-c-irradiation-to-the-dried-powder
#1
Konstantinos Papoutsis, Quan V Vuong, Penta Pristijono, John B Golding, Michael C Bowyer, Christopher J Scarlett, Costas E Stathopoulos
Several studies have shown that UV-C (ultraviolet C) irradiation promotes the bioactive compounds and antioxidants of fresh fruits and vegetables. The aim of this study was to apply UV irradiation in dried lemon pomace powder for enhancing its phenolic content and antioxidant properties, thus more bioactive compounds should be available for extraction and utilization. Lemon pomace dried powder was placed under a UV lamp and treated with dosages of 4, 19, 80 and 185 kJ·m(-2), while untreated powder was used as a control...
August 23, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231082/rheometric-non-isothermal-gelatinization-kinetics-of-chickpea-flour-based-gluten-free-muf%C3%AF-n-batters-with-added-biopolymers
#2
María Dolores Alvarez, Francisco Javier Cuesta, Beatriz Herranz, Wenceslao Canet
An attempt was made to analyze the elastic modulus (G0) of chickpea flour (CF)-based muffin batters made with CF alone and with added biopolymers (whey protein (WP), xanthan gum (XG), inulin (INL), and their blends) in order to evaluate their suitability to be a wheat flour (WF) substitute in muffins, and to model the heat-induced gelatinization of batters under non-isothermal heating condition from 25 ◦C to 90 ◦C. A rheological approach is proposed to determine the kinetic parameters (reaction order (n), frequency factor (k0), and activation energy (Ea)) using linearly-increasing temperature...
January 2, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28229211/multicenter-international-experience-of-532%C3%A2-nm-laser-photo-vaporization-with-greenlight-xps-in-men-with-large-prostates-prostate-volume%C3%A2-%C3%A2-100%C3%A2-cc
#3
Malek Meskawi, Pierre-Alain Hueber, Roger Valdivieso, Franck Bruyere, Vincent Misrai, Georges Fournier, Ravi Munver, Ganesh Sivarajan, Matthew Rutman, Alexis E Te, Bilal Chughtai, Dean Elterman, Tristan Martel, Mounsif Azizi, Pierre I Karakiewicz, Kevin C Zorn
PURPOSE: To evaluate the outcomes and durability of photoselective vaporization of the prostate (PVP) using the XPS-180 system in patients with a large prostate volume (PV) > 100 cc at 4 years of follow-up in a large, multicenter experience. METHODS: 438 men with pre-operative transrectal ultrasound (TRUS) PV > 100 cc were treated in eight experienced centers in Canada, USA, and in France with the Greenlight XPS laser using PVP for the treatment of symptomatic BPH...
February 22, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28228041/thermodynamics-of-hydration-of-fullerols-c60-oh-n-and-hydrogen-bond-dynamics-in-their-hydration-shells
#4
Sonanki Keshri, B L Tembe
Molecular dynamics simulations of fullerene and fullerols [C60(OH)n, where n = 2-30] in aqueous solutions have been performed for the purpose of obtaining a detailed understanding of the structural and dynamic properties of these nanoparticles in water. The structures, dynamics and hydration free energies of the solute molecules in water have been analysed. Radial distribution functions, spatial density distribution functions and hydrogen bond analyses are employed to characterize the solvation shells of water around the central solute molecules...
February 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28225281/hydrogen-abstraction-from-hydrocarbons-by-nh2
#5
Kamal Siddique, Mohammednoor K Altarawneh, Jeff Gore, Phillip R Westmoreland, Bogdan Z Dlugogorski
This contribution investigates thermokinetic parameters of bimolecular gas-phase reactions involving the amine (NH2) radical and a large number of saturated and unsaturated hydrocarbons. These reactions play an important role in combustion and pyrolysis of nitrogen-rich fuels, most notably biomass. Computations performed at the CBS-QB3 level and based on the conventional transition-state theory yield potential-energy surfaces and reaction rate constants, accounting for tunnelling effects and the presence of hindered rotors...
February 22, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28223460/mechanism-of-h2s-oxidation-by-the-dissimilatory-perchlorate-reducing-microorganism-azospira-suillum-ps
#6
Misha G Mehta-Kolte, Dana Loutey, Ouwei Wang, Matthew D Youngblut, Christopher G Hubbard, Kelly M Wetmore, Mark E Conrad, John D Coates
The genetic and biochemical basis of perchlorate-dependent H2S oxidation (PSOX) was investigated in the dissimilatory perchlorate-reducing microorganism (DPRM) Azospira suillum PS (PS). Previously, it was shown that all known DPRMs innately oxidize H2S, producing elemental sulfur (S(o)). Although the process involving PSOX is thermodynamically favorable (ΔG°' = -206 kJ ⋅ mol(-1) H2S), the underlying biochemical and genetic mechanisms are currently unknown. Interestingly, H2S is preferentially utilized over physiological electron donors such as lactate or acetate although no growth benefit is obtained from the metabolism...
February 21, 2017: MBio
https://www.readbyqxmd.com/read/28221933/thermal-inactivation-kinetics-of-sporolactobacillus-nakayamae-spores-a-spoilage-bacterium-isolated-from-a-model-mashed-potato-scallion-mixture
#7
Hayriye Bozkurt, Jairus R D David, Ryan J Talley, D Scott Lineback, P Michael Davidson
Sporolactobacillus species have been occasionally isolated from spoiled foods and environmental sources. Thus, food processors should be aware of their potential presence and characteristics. In this study, the heat resistance and influence of the growth and recovery media on apparent heat resistance of Sporolactobacillus nakayamae spores were studied and described mathematically. For each medium, survivor curves and thermal death curves were generated for different treatment times (0 to 25 min) at different temperatures (70, 75, and 80°C) and Weibull and first-order models were compared...
September 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221047/excited-state-proton-transfer-in-indigo
#8
Joao Pina, Daniela Santos Sarmento, Marco Accoto, Pier Luigi Gentili, Luigi Vaccaro, Adelino M Galvão, J Sérgio Seixas de Melo
Excited state proton transfer (ESPT) in Indigo (Ind) and its mono hexyl-substituted derivative (NHxInd) in solution was investigated experimentally as a function of solvent viscosity, polarity and temperature, and theoretically by time-dependent DFT (TDDFT) calculations. Although a single emission band is observed, the fluorescence decays (collected at different wavelengths along the emission band using time-correlated single photon counting (TCSPC)) are bi-exponential, with two identical decay times but different pre-exponential factors, consistent with the existence of excited state keto and enol species...
February 21, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28215013/crowded-skies-conflicts-between%C3%A2-expanding%C3%A2-goose-populations-and-aviation-safety
#9
David R Bradbeer, Camilla Rosenquist, Thomas Kjær Christensen, Anthony D Fox
We here review the collision risks posed by large-bodied, flocking geese to aircraft, exacerbated by recent major increases in northern hemisphere goose populations and air traffic volume. Mitigation of goose-aircraft strike risks requires knowledge of local goose movements, global goose population dynamics and ecology. Airports can minimise goose strikes by managing habitats within the airport property, applying deterrents to scare geese away and lethal control, but goose migration and movements at greater spatial scales present greater challenges...
March 2017: Ambio
https://www.readbyqxmd.com/read/28212459/structural-studies-of-nicotinoids-cotinine-vs-nicotine
#10
Iciar Uriarte, Cristóbal Pérez, Elena Caballero-Mancebo, Francisco J Basterretxea, Alberto Lesarri, José A Fernández, Emilio J Cocinero
Nicotinoids are agonists of the acetylcholine receptor (nAChR) and play important biochemical and pharmacological roles. Here we report on the structural and conformational landscape of cotinine, and compare its molecular properties with the nicotine prototype, from which it only differs in the addition of a carbonyl group. The investigation of cotinine included a theoretical survey of the effects of rotamerization of the pyridine moiety, the puckering of the pyrrolidinone ring and the internal rotation of the methyl group...
February 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28212034/observation-of-the-global-dynamic-collectivity-of-a-hydration-shell-around-apomyoglobin
#11
Yangzhong Qin, Luyuan Zhang, Lijuan Wang, Dongping Zhong
Protein surface hydration is critical to its structural properties and biological activities. However, it is still unknown whether the hydration shell is intrinsically connected and how its fluctuations dynamically interact with protein motions. Here, by selecting five site-specific locations with distinctly different environments around apomyoglobin surface, we used a tryptophan scan with femtosecond fluorescence spectroscopy and simultaneously detected hydration-water dynamics and tryptophan sidechain relaxations with temperature dependence...
February 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28211697/benchmarking-density-functionals-for-chemical-bonds-of-gold
#12
Kasper Planeta Kepp
Gold plays a major role in nanochemistry, catalysis, and electrochemistry. Accordingly, hundreds of studies apply density functionals to study chemical bonding with gold, yet there is no systematic attempt to assess the accuracy of these methods applied to gold. This paper reports a benchmark against 51 experimental bond enthalpies of AuX systems and seven additional polyatomic and cationic molecules. 12 density functionals were tested, covering meta functionals, hybrids with variable HF exchange, double-hybrid, dispersion-corrected and non-hybrid GGA functionals...
February 17, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28211620/benchmark-ditopic-binding-of-cl-and-cs-by-the-macrocycle-hexacyclen
#13
Juan Ramon Aviles-Moreno, Giel Berden, Jos Oomens, Bruno Martinez-Haya
The ditopic binding of organic and inorganic anions and cations constitutes a distinct feature of polyazamacrocycles that underlies their action as intermediate docking and exchange ionophoric sites for tailored supramolecular synthesis and sensors. This work investigates the Cl- and Cs+ complexes formed by hexacyclen (1,4,7,10,13,16-hexaazacyclooctadecane, ha18c6), a benchmark building block of ion-pair polyamine receptors. Infrared action spectroscopy is employed to characterize the anionic and cationic complexes under controlled environmental conditions in an ion trap...
February 17, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28211057/reproductive-energy-expenditure-and-changes-in-body-morphology-for-a-population-of-chinook-salmon-oncorhynchus-tshawytscha-with-a-long-distance-migration
#14
T E Bowerman, A Pinson-Dumm, C A Peery, C C Caudill
Energetic demands of a long freshwater migration, extended holding period, gamete development and spawning were evaluated for a population of stream-type Chinook salmon Oncorhynchus tshawytscha. Female and male somatic mass decreased by 24 and 21%, respectively, during migration and by an additional 18 and 12% during holding. Between freshwater entry and death after spawning, females allocated 14% of initial somatic energy towards gonad development and 78% for metabolism (46, 25 and 7% during migration, holding and spawning, respectively)...
February 16, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28210735/the-dehydrogenation-mechanism-during-the-incubation-period-in-nanocrystalline-mgh2
#15
Apurva Shantilal Gangrade, Akhil Aditya Varma, Nikhil Kishor Gor, Sweta Shriniwasan, Sankara Sarma V Tatiparti
The dehydrogenation mechanism during the incubation period in nanocrystalline MgH2 (low α: converted metal fraction and dα/dt) and the reasons for the occurrence of the incubation period at 320, 350, and 400 °C were investigated. Pre-existing Mg crystallites can enhance Mg nucleation during the incubation period, as suggested by the estimated activation energy for nucleation (12 ± 2 kJ per mol H). The released H-atoms enter MgH2 as interstitials, as indicated by the MgH2 unit-cell contraction, resulting in increased equatorial Mg-H bond length, decreased charge-density distribution in the interstitial region, as observed from the charge-density maps, and decreased H-H distance in the {001} plane up to the midway of the incubation period...
February 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28210733/super-high-energy-density-single-bonded-trigonal-nitrogen-allotrope-a-chemical-twin-of-the-cubic-gauche-form-of-nitrogen
#16
Sergey V Bondarchuk, Boris F Minaev
A new ambient-pressure metastable single-bonded 3D nitrogen allotrope (TrigN) of trigonal symmetry (space group R3[combining macron]) was calculated using density functional theory (DFT). A comprehensive characterization of this material, comprising thermodynamic, elastic, and spectral (vibrational, UV-vis absorption, and nuclear magnetic resonance) properties, was performed. Using high-throughput band structure calculation, the TrigN phase was characterized as an insulator with an indirect band gap of 2.977 eV...
February 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28208822/preparation-of-nanocellulose-reinforced-chitosan-films-cross-linked-by-adipic-acid
#17
Pouria Falamarzpour, Tayebeh Behzad, Akram Zamani
Adipic acid, an abundant and nontoxic compound, was used to dissolve and cross-link chitosan. After the preparation of chitosan films through casting technique, the in situ amidation reaction was performed at 80-100 °C as verified by Fourier transform infrared (FT-IR). The reaction was accompanied by the release of water which was employed to investigate the reaction kinetics. Accordingly, the reaction rate followed the first-order model and Arrhenius equation, and the activation energy was calculated to be 18 kJ/mol...
February 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28208641/temporal-trends-in-satellite-derived-erythemal-uvb-and-implications-for-ambient-sun-exposure-assessment
#18
Marvin Langston, Leslie Dennis, Charles Lynch, Denise Roe, Heidi Brown
Ultraviolet radiation (UVR) has been associated with various health outcomes, including skin cancers, vitamin D insufficiency, and multiple sclerosis. Measurement of UVR has been difficult, traditionally relying on subject recall. We investigated trends in satellite-derived UVB from 1978 to 2014 within the continental United States (US) to inform UVR exposure assessment and determine the potential magnitude of misclassification bias created by ignoring these trends. Monthly UVB data remotely sensed from various NASA satellites were used to investigate changes over time in the United States using linear regression with a harmonic function...
February 10, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28206872/associations-between-education-and-physical-functioning-and-pain-in-adult-danish-cancer-survivors
#19
Dorte Winther, Tina K Nygaard, Trine A Horsbøl, Trille Kjær, Peter Vedsted, Christoffer Johansen, Hanna B Hovaldt, Mette Sandager, Susanne O Dalton
BACKGROUND: Late effects after cancer diagnosis and treatment are common, but only few studies have examined the role of social factors in developing these late effects. The aim of this study was to examine the association between educational level and physical function and pain among cancer survivors two years after diagnosis. MATERIAL AND METHODS: The study population consisted of adult Danish patients with a first-time cancer diagnosis who were sent a questionnaire in 2010 and followed up in 2012...
February 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28203621/comparative-study-evaluating-the-efficiency-of-cooled-and-uncooled-single-treatment-mwa-in-thyroid-nodules-after-a-3-month-follow-up
#20
Oscar Maximilian Mader, Nadine Farivar Tanha, Alexander Mader, Christian Happel, Yücel Korkusuz, Frank Grünwald
OBJECTIVE: The aim of this study was to evaluate and compare the efficacy of single-treatment cooled and uncooled microwave ablation in thyroid nodules. METHODS: Eighteen patients (11 women) with an average age of 62 years (range: 41-80) with 18 cold, mainly solid or solid thyroid nodules were treated with cooled or uncooled microwave ablation. Pain during the treatment was measured on a 10-point score. Side effects revealed by ultrasound or patients' complaints were documented...
2017: European Journal of Radiology Open
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