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https://www.readbyqxmd.com/read/28454041/long-term-intake-of-a-high-protein-diet-increases-liver-triacylglycerol-deposition-pathways-and-hepatic-signs-of-injury-in-rats
#1
Rubén Díaz-Rúa, Jaap Keijer, Andreu Palou, Evert M van Schothorst, Paula Oliver
Intake of high-protein (HP) diets has increased over the last years, mainly due to their popularity for body weight control. Liver is the main organ handling ingested macronutrients and it is associated with the beginning of different pathologies. We aimed to deepen our knowledge on molecular pathways affected by long-term intake of an HP diet. We performed a transcriptome analysis on liver of rats chronically fed with a casein-rich HP diet and analyzed molecular parameters related to liver injury. Chronic increase in the dietary protein/carbohydrate ratio up-regulated processes related with amino acid uptake/metabolism and lipid synthesis, promoting a molecular environment indicative of hepatic triacylglycerol (TG) deposition...
April 19, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28454034/immobilization-of-phenanthrene-onto-gemini-surfactant-modified-sepiolite-at-solid-aqueous-interface-equilibrium-thermodynamic-and-kinetic-studies
#2
Shan Zhao, Guohe Huang, Sen Mu, Chunjiang An, Xiujuan Chen
The immobilization of phenanthrene from aqueous phase onto natural and gemini surfactant modified sepiolite was investigated with respect to contact time, pH, ionic strength and temperature. The surface modification was examined through FT-IR characterization, SEM technique, and the thermogravimetric analysis. The maximum sorption capacity of phenanthrene on modified sepiolite was 95.15μgg(-1) with initial PHE concentration 1.0mgL(-1), temperature 293K, pH7, and ionic strength 1M. The corresponding PHE removal efficiency was higher than 95%...
April 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28454005/competitive-sorption-affinity-of-sulfonamides-and-chloramphenicol-antibiotics-toward-functionalized-biochar-for-water-and-wastewater-treatment
#3
Mohammad Boshir Ahmed, John L Zhou, Huu Hao Ngo, Wenshan Guo, Md Abu Hasan Johir, Dalel Belhaj
Competitive sorption of sulfamethazine (SMT), sulfamethoxazole (SMX), sulfathiazole (STZ) and chloramphenicol (CP) toward functionalized biochar (fBC) was highly pH dependent with maximum sorption at pH ∼4.0-4.25. Equilibrium data were well represented by the Langmuir and Freundlich models in the order STZ>SMX>CP>SMT. Kinetics data were slightly better fitted by the pseudo second-order model than pseudo first-order and intra-particle-diffusion models. Maximum sorptive interactions occurred at pH 4...
April 13, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28449541/nanoscale-observation-of-dehydration-process-in-phema-hydrogel-structure
#4
Kordian Chamerski, Witold Korzekwa, Jacek Filipecki, Olha Shpotyuk, Marcin Stopa, Piotr Jeleń, Maciej Sitarz
One of the most important field of interest in respect to hydrogel materials is their capability to water storage. The problem mentioned above plays an important role regarding to diffusion of fluid media containing nanoparticles, what is very useful in biomedical applications, such as artificial polymeric implants, drug delivery systems or tissue engineering.In presented work, dehydration process in hydrogels used in ophthalmology as intraocular lenses was observed. Before measurements studied materials were immersed in deionized water and saline solution to obtain equilibrium swelling state...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28449233/an-evaluation-of-the-international-society-for-animal-genetics-recommended-parentage-and-identification-panel-for-the-domestic-pigeon-columba-livia-domestica
#5
M de Groot, W A van Haeringen
In this study, the International Society for Animal Genetics (ISAG) recommended panel for the identification of the domestic pigeon (Columba livia domestica) is characterized based on commonly used statistical parameters. The marker panel is based on 16 short tandem repeat (STR) loci (PIGN15, PIGN10, PIGN57, PIGN26, CliμD16, CliμD19, PIGN12, CliμD17, CliμT17, PIGN04, CliμD01, CliμD11, CliμD35, CliμT02, CliμT13, CliμT43). The alleles of the 16 loci consist of a mixture of tri-, tetra-, penta- and hexameric repeat patterns...
April 27, 2017: Animal Genetics
https://www.readbyqxmd.com/read/28448930/determining-equilibrium-partition-coefficients-between-lipid-protein-and-polydimethylsiloxane-for-highly-hydrophobic-organic-contaminants-using-preloaded-disks
#6
Yuanyuan Pei, Huizhen Li, Jing You
Bioaccumulation of hydrophobic organic contaminants is of great concern and understanding their partitioning to biological phases is crucial for estimating their bioaccumulation potential. The estimation, however, was of large uncertainty for highly hydrophobic organic contaminants (HHOCs) with log KOW>9 due to the challenge of quantifying their water concentrations. In the present study, partition coefficients between polydimethylsiloxane (PDMS) and storage lipid (KSL,PDMS), membrane lipid (KML,PDMS) and protein (Kpro,PDMS) were measured for 21 polychlorinated biphenyls (PCBs), 14 polybrominated diphenyl ethers (PBDEs), dechlorane plus (DP) and decabromodiphenyl ethane (DBDPE), covering log KOW from 5...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28448635/excited-state-dynamics-of-bis-dehydroxycurcumin-tert-butyl-ester-a-diketo-shifted-derivative-of-the-photosensitizer-curcumin
#7
Luca Nardo, Angelo Maspero, Andrea Penoni, Giovanni Palmisano, Erika Ferrari, Monica Saladini
Bis-dehydroxycurcumin tert-butyl ester (K2T23) is a derivative of the natural spice curcumin. Curcumin is widely studied for its multiple therapeutic properties, including photosensitized cytotoxicity. However, the full exploitation of curcumin phototoxic potential is hindered by the extreme instability of its excited state, caused by very efficient non radiative decay by means of transfer of the enolic proton to the nearby keto oxygen. K2T23 is designed to exhibit a tautomeric equilibrium shifted toward the diketo conformers with respect to natural curcumin...
2017: PloS One
https://www.readbyqxmd.com/read/28448443/the-effect-of-thermal-fluctuation-on-the-receptor-mediated-adhesion-of-a-cell-membrane-to-an-elastic-substrate
#8
Bahador Marzban, Hongyan Yuan
Mechanics of the bilayer membrane play an important role in many biological and bioengineering problems such as cell-substrate and cell-nanomaterial interactions. In this work, we study the effect of thermal fluctuation and the substrate elasticity on the cell membrane-substrate adhesion. We model the adhesion of a fluctuating membrane on an elastic substrate as a two-step reaction comprised of the out-of-plane membrane fluctuation and the receptor-ligand binding. The equilibrium closed bond ratio as a function of substrate rigidity was computed by developing a coupled Fourier space Brownian dynamics and Monte Carlo method...
April 27, 2017: Membranes
https://www.readbyqxmd.com/read/28448186/association-between-cyp3a5-genotypes-with-hypertension-in-chinese-han-population-a-case-control-study
#9
Zhanzhan Li, Peng Chen, Tao Zhou, Xiaofang Chen, Lizhang Chen
BACKGROUND: The association of CYP3A5 gene polymorphisms with hypertension in the Chinese population is unknown. We explored the association between the CYP3A5 (rs776746) gene and hypertension in the Chinese Han population. METHODS: Using a case-control design, 340 cases and 254 controls were enrolled from the Third Affiliated Hospital of South Medical University between July and December of 2015. We used a standardized questionnaire to collect data regarding age, sex, smoking, drinking, family history of hypertension, and physical exercise...
2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28448153/on-the-thermal-stability-of-metal-nanocrystals-an-investigation-of-the-surface-and-bulk-reconstructions-of-pd-concave-icosahedra
#10
Kyle D Gilroy, Ahmed O Elnabawy, Tung-Han Yang, Luke T Roling, Jane Howe, Manos Mavrikakis, Younan Xia
Despite the remarkable success in controlling the synthesis of metal nanocrystals, it still remains a grand challenge to stabilize and preserve the shapes or internal structures of metastable kinetic products. In this work, we address this issue by systematically investigating the surface and bulk reconstructions experienced by a Pd concave icosahedron when subjected to heating up to 600 (o)C in vacuum. We used in situ high-resolution transmission electron microscopy to identify the equilibration pathways of this far-from-equilibrium structure...
April 27, 2017: Nano Letters
https://www.readbyqxmd.com/read/28448115/high-temperature-superconductivity-in-boron-doped-q-carbon
#11
Anagh Bhaumik, Ritesh Sachan, Jagdish Narayan
We report high-temperature superconductivity in B-doped amorphous quenched carbon (Q-carbon). This phase is formed after nanosecond laser melting of B-doped amorphous carbon films in a super undercooled state and followed by rapid quenching. Magnetic susceptibility measurements show the characteristics of type-II Bardeen-Cooper-Schrieffer superconductivity with a superconducting transition temperature (Tc) of 36.0±0.5 K for 17.0±1.0 atomic percent boron concentration. This value is significantly higher than the best experimentally reported Tc of 11 K for crystalline B-doped diamond...
April 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/28447798/spontaneous-droplet-motion-on-a-periodic-compliant-substrate
#12
Tianshu Liu, Nichole K Nadermann, Zhenping He, Steven H Strogatz, Chung-Yuen Hui, Anand Jagota
Droplet motion arises in many natural phenomena, ranging from the familiar gravity-driven slip and arrest of raindrops on windows, to the directed transport of droplets for water harvesting by plants and animals under dry conditions. Delib-erate transportation and manipulation of droplets is also important in many technological applications, including drop-let-based microfluidic chemical reactors and for thermal management. Droplet motion usually requires gradients of sur-face energy or temperature, or external vibration to overcome contact angle hysteresis...
April 27, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28447169/modeling-of-carbon-dioxide-mass-transfer-behavior-in-attached-cultivation-photobioreactor-using-the-analysis-of-the-ph-profiles
#13
Chunli Ji, Junfeng Wang, Runzhi Li, Tianzhong Liu
The CO2 mass transfer model associated with growth kinetics of microalgal biofilm in attached cultivation photobioreactor was developed and verified by using the analysis of pH profiles which were in equilibrium with inorganic carbon components concentrations (CO2, H2CO3, HCO3(-) and CO3(2-)) in medium. Model simulation results showed that the model well presented the biofilm growth process. The overall volumetric mass transfer coefficient of CO2 was more influenced by CO2 concentration in aerated gas but less by gas aeration rate and medium circulation rate...
April 26, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28446768/linear-dynamics-of-classical-spin-as-m%C3%A3-bius-transformation
#14
Alexey Galda, Valerii М Vinokur
Though the overwhelming majority of natural processes occur far from the equilibrium, general theoretical approaches to non-equilibrium phase transitions remain scarce. Recent breakthroughs introduced a description of open dissipative systems in terms of non-Hermitian quantum mechanics enabling the identification of a class of non-equilibrium phase transitions associated with the loss of combined parity (reflection) and time-reversal symmetries. Here we report that the time evolution of a single classical spin (e...
April 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28446332/dna-polymerase-inhibition-by-high-kinetic-stability-of-t-hg-ii-t-base-pairs
#15
Olivia P Schmidt
A fluorescent surrogate of thymidine called DMAT was used for the first fluorescence-based study of HgII binding to discrete T-T sites in duplex DNA. The fluorescent properties of DMAT-A base pairs were highly sensitive to wild-type T-HgII-T base pair formation at an adjacent site, allowing for a determination of the precise thermodynamic and kinetic parameters of these metal binding reactions. T-HgII-T complexes exhibited equilibrium dissociation constants of Kd ≈ 8-50 nM. These high-affinity binding interactions are characterized by very slow association and dissociation kinetics (kon ≈ 104- 105 M-1s-1, koff ≈ 10-4 - 10-3s-1), revealing exceptionally high kinetic stabilities of T-HgII-T base pairs (half-lives = 0...
April 26, 2017: Chimia
https://www.readbyqxmd.com/read/28446150/signatures-of-co-evolutionary-host-pathogen-interactions-in-the-genome-of-the-entomopathogenic-nematode-steinernema-carpocapsae
#16
Mitzi Flores-Ponce, Miguel Vallebueno-Estrada, Eduardo González-Orozco, Hilda E Ramos-Aboites, J Noé García-Chávez, Nelson Simões, Rafael Montiel
BACKGROUND: The entomopathogenic nematode Steinernema carpocapsae has been used worldwide as a biocontrol agent for insect pests, making it an interesting model for understanding parasite-host interactions. Two models propose that these interactions are co-evolutionary processes in such a way that equilibrium is never reached. In one model, known as "arms race", new alleles in relevant genes are fixed in both host and pathogens by directional positive selection, producing recurrent and alternating selective sweeps...
April 26, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28445763/myosin-rod-hypophosphorylation-and-cb-kinetics-in-papillary-muscles-from-a-tnc-a8v-ki-mouse-model
#17
Masataka Kawai, Jamie R Johnston, Tarek Karam, Li Wang, Rakesh K Singh, Jose R Pinto
The cardiac troponin C (TnC)-A8V mutation is associated with hypertrophic and restrictive cardiomyopathy (HCM and RCM) in human and mice. The residue affected lies in the N-helix, a region known to affect Ca(2+)-binding affinity to the N-terminal domain. Here we report on the functional effects of this mutation in skinned papillary muscle fibers from homozygous knock-in TnC-A8V mice. Muscle fibers from left ventricle were activated at 25°C under the ionic conditions of working cardiomyocytes. The pCa-tension relationship showed a 3× increase in Ca(2+)-sensitivity and a decrease (0...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28445749/equilibrium-ensembles-for-insulin-folding-from-bias-exchange-metadynamics
#18
Richa Singh, Rohit Bansal, Anurag Singh Rathore, Gaurav Goel
Earliest events in the aggregation process, such as single molecule reconfiguration, are extremely important and the most difficult to characterize in experiments. To this end, we have used well-tempered bias exchange metadynamics simulations to determine the equilibrium ensembles of an insulin molecule under amyloidogenic conditions of low pH and high temperature. A bin-based clustering method that uses statistics accumulated in bias exchange metadynamics trajectories was employed to construct a detailed thermodynamic and kinetic model of insulin folding...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28445697/influence-of-maturation-on-in-vivo-tissue-to-plasma-partition-coefficients-for-cis-and-trans-permethrin
#19
Manoj Amaraneni, Jing Pang, James V Bruckner, Srinivasa Muralidhara, Tanzir B Mortuza, Darren Gullick, Shirin Hooshfar, Catherine A White, Brian S Cummings
Permethrin, the most widely used household insecticide in the U.S., is marketed as a mixture of its cis (CIS) and trans (TRANS) isomers. The major objective of this investigation was to develop and utilize a reliable approach to determine in vivo partition coefficients (PCs) for CIS and TRANS in immature and adult Sprague-Dawley rats. Adult, postnatal day (PND) 21 and PND 15 rats were infused with environmentally relevant concentrations of CIS or TRANS via a s.c. osmotic pump for 48 or 72 h. The adult and PND 21 rats also received an oral loading dose...
April 23, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28445058/non-ideal-behavior-of-glass-and-crystal
#20
Yashika Sharma, Sevi Murugavel
We report deviations from an ideal behavior of binary chalcogenide glass composition Ge20Te80 with respect to its quenching rate on mass density and thermal parameters including glass transition temperature. In an ideal glass, the increase in quenching rate will decrease the characteristic relaxation time and correspondingly shift in the glass transition temperature (Tg) to higher temperature and result in lower density. This, however, holds only when the liquid structure remains same as in equilibrium glass structure independent of their quenching rate...
April 26, 2017: Journal of Physical Chemistry. B
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