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https://www.readbyqxmd.com/read/28108729/comparative-omega-3-fatty-acid-enrichment-of-egg-yolks-from-first-cycle-laying-hens-fed-flaxseed-oil-or-ground-flaxseed
#1
I J Ehr, M E Persia, E A Bobeck
When laying hen diets are enriched with omega-3 polyunsaturated fatty acids to generate value-added eggs for human consumption markets, concentrations of alpha-linolenic (ALA), eicosapentaenoic (EPA), and docosahexaenoic acids (DHA) in the yolk can reach 250 mg/50 g whole egg. Flaxseed, a rich source of ALA, is commonly used for omega-3 enrichment; however, the impact of dietary flaxseed source (extracted oil vs. milled seed) on fatty acid transfer to egg yolk in laying hens is unknown. Therefore, transfer of ALA, EPA, and DHA into egg yolk from extracted flaxseed oil or milled flaxseed was evaluated in Hy-Line W-36 laying hens over an 8-week feeding period (25 to 33 wk old)...
January 20, 2017: Poultry Science
https://www.readbyqxmd.com/read/28108187/application-of-an-artificial-neural-network-for-evaluation-of-activity-concentration-exemption-limits-in-norm-industry
#2
Hannah Wiedner, Virginia Peyrés, Teresa Crespo, Marcos Mejuto, Eduardo García-Toraño, Franz Josef Maringer
NORM emits many different gamma energies that have to be analysed by an expert. Alternatively, artificial neural networks (ANNs) can be used. These mathematical software tools can generalize "knowledge" gained from training datasets, applying it to new problems. No expert knowledge of gamma-ray spectrometry is needed by the end-user. In this work an ANN was created that is able to decide from the raw gamma-ray spectrum if the activity concentrations in a sample are above or below the exemption limits.
December 27, 2016: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28107817/can-calculation-of-energy-expenditure-based-on-co2-measurements-replace-indirect-calorimetry
#3
Taku Oshima, Séverine Graf, Claudia-Paula Heidegger, Laurence Genton, Jérôme Pugin, Claude Pichard
BACKGROUND: Methods to calculate energy expenditure (EE) based on CO2 measurements (EEVCO2) have been proposed as a surrogate to indirect calorimetry. This study aimed at evaluating whether EEVCO2 could be considered as an alternative to EE measured by indirect calorimetry. METHODS: Indirect calorimetry measurements conducted for clinical purposes on 278 mechanically ventilated ICU patients were retrospectively analyzed. EEVCO2 was calculated by a converted Weir's equation using CO2 consumption (VCO2) measured by indirect calorimetry and assumed respiratory quotients (RQ): 0...
January 21, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28107205/comparison-of-linear-and-non-linear-models-for-predicting-energy-expenditure-from-raw-accelerometer-data
#4
Alexander H K Montoye, Munni Begum, Zachary Henning, Karin A Pfeiffer
This study had three purposes, all related to evaluating energy expenditure (EE) prediction accuracy from body-worn accelerometers: (1) compare linear regression to linear mixed models, (2) compare linear models to artificial neural network models, and (3) compare accuracy of accelerometers placed on the hip, thigh, and wrists. Forty individuals performed 13 activities in a 90 min semi-structured, laboratory-based protocol. Participants wore accelerometers on the right hip, right thigh, and both wrists and a portable metabolic analyzer (EE criterion)...
January 20, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28107043/the-impact-of-meal-timing-on-cardiometabolic-syndrome-indicators-in-shift-workers
#5
Hylton E Molzof, Michael D Wirth, James B Burch, Nitin Shivappa, James R Hebert, Russell L Johnson, Karen L Gamble
The aims of this study were to 1) compare the inflammatory potential of night- and day-shift nurses' diets with regard to time of day and work status and 2) explore how the timing of food intake during work and off-work is associated with cardiometabolic syndrome (CMS) risk factors between these two groups. Female nurses (N = 17; 8 day-shift and 9 night-shift) reported food intake over 9 days. On a middle day off of work, metabolic parameters were measured after an overnight fast. Energy/macronutrient intake and inflammatory potential of dietary intake (as assessed via the Dietary Inflammatory Index(TM)) were calculated for nurses' workdays, work nights, off-work days, and off-work nights...
January 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28106932/metal-co2-batteries-on-the-road-co2-from-contamination-gas-to-energy-source
#6
REVIEW
Zhaojun Xie, Xin Zhang, Zhang Zhang, Zhen Zhou
Rechargeable nonaqueous metal-air batteries attract much attention for their high theoretical energy density, especially in the last decade. However, most reported metal-air batteries are actually operated in a pure O2 atmosphere, while CO2 and moisture in ambient air can significantly impact the electrochemical performance of metal-O2 batteries. In the study of CO2 contamination on metal-O2 batteries, it has been gradually found that CO2 can be utilized as the reactant gas alone; namely, metal-CO2 batteries can work...
January 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28106897/transition-metal-co-ni-nanoparticles-wrapped-with-carbon-and-their-superior-catalytic-activities-for-the-reversible-hydrogen-storage-of-magnesium-hydride
#7
Xu Huang, Xuezhang Xiao, Wei Zhang, Xiulin Fan, Liuting Zhang, Changjun Cheng, Shouquan Li, Hongwei Ge, Qidong Wang, Lixin Chen
Magnesium hydride (MgH2) exhibits long-term stability and has recently been developed as a safe alternative to store hydrogen in the solid state, due to its high capacity of 7.6 wt% H2 and low cost compared to other metal hydrides. However, the high activation energy and poor kinetics of MgH2 lead to inadequate hydrogen storage properties, resulting in low energy efficiency. Nano-catalysis is deemed to be the most effective strategy in improving the kinetics performance of hydrogen storage materials. In this work, robust and efficient architectures of carbon-wrapped transition metal (Co/C, Ni/C) nanoparticles (8-16 nm) were prepared and used as catalysts in the MgH2 system via ball milling to improve its de/rehydrogenation kinetics...
January 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28106402/molecular-orbital-rule-for-quantum-interference-in-weakly-coupled-dimers-%C3%A2-low-energy-giant-conductance-switching-induced-by-orbital-level-crossing
#8
Daijiro Nozaki, Andreas Lücke, Wolf Gero Schmidt
Destructive Quantum interference (QI) in molecular junctions has attracted much attention in recent years. It can tune the conductance of molecular devices dramatically, which implies numerous potential applications in thermoelectric and switching applications. There are several schemes that address and rationalize QI in single molecular devices. Dimers play a particular role in this respect, since the QI signal may disappear, depending on the dislocation of monomers. In this Letter, we derive a simple rule that governs the occurrence of QI in weakly coupled dimer stacks of both alternant and non-alternant polyaromatic hydrocarbons (PAHs) and extends the Tada-Yoshizawa scheme...
January 20, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28106164/diverse-strategies-of-o2-usage-for-preventing-photo-oxidative-damage-under-co2-limitation-during-algal-photosynthesis
#9
Ginga Shimakawa, Yusuke Matsuda, Kensuke Nakajima, Masahiro Tamoi, Shigeru Shigeoka, Chikahiro Miyake
Photosynthesis produces chemical energy from photon energy in the photosynthetic electron transport and assimilates CO2 using the chemical energy. Thus, CO2 limitation causes an accumulation of excess energy, resulting in reactive oxygen species (ROS) which can cause oxidative damage to cells. O2 can be used as an alternative energy sink when oxygenic phototrophs are exposed to high light. Here, we examined the responses to CO2 limitation and O2 dependency of two secondary algae, Euglena gracilis and Phaeodactylum tricornutum...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28106122/comparative-genomics-and-transcriptome-analysis-of-aspergillus-niger-and-metabolic-engineering-for-citrate-production
#10
Xian Yin, Hyun-Dong Shin, Jianghua Li, Guocheng Du, Long Liu, Jian Chen
Despite a long and successful history of citrate production in Aspergillus niger, the molecular mechanism of citrate accumulation is only partially understood. In this study, we used comparative genomics and transcriptome analysis of citrate-producing strains-namely, A. niger H915-1 (citrate titer: 157 g L(-1)), A1 (117 g L(-1)), and L2 (76 g L(-1))-to gain a genome-wide view of the mechanism of citrate accumulation. Compared with A. niger A1 and L2, A. niger H915-1 contained 92 mutated genes, including a succinate-semialdehyde dehydrogenase in the γ-aminobutyric acid shunt pathway and an aconitase family protein involved in citrate synthesis...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28105922/differential-expression-of-alternatively-spliced-transcripts-related-to-energy-metabolism-in-colorectal-cancer
#11
Anastasiya Vladimirovna Snezhkina, George Sergeevich Krasnov, Andrew Rostislavovich Zaretsky, Alex Zhavoronkov, Kirill Mikhailovich Nyushko, Alexey Alexandrovich Moskalev, Irina Yurievna Karpova, Anastasiya Isaevna Afremova, Anastasiya Valerievna Lipatova, Dmitriy Vladimitovich Kochetkov, Maria Sergeena Fedorova, Nadezhda Nikolaevna Volchenko, Asiya Fayazovna Sadritdinova, Nataliya Vladimirovna Melnikova, Dmitry Vladimirovich Sidorov, Anatoly Yurievich Popov, Dmitry Valerievich Kalinin, Andrey Dmitrievich Kaprin, Boris Yakovlevich Alekseev, Alexey Alexandrovich Dmitriev, Anna Viktorovna Kudryavtseva
BACKGROUND: Colorectal cancer (CRC) is one of the most common malignant tumors worldwide. CRC molecular pathogenesis is heterogeneous and may be followed by mutations in oncogenes and tumor suppressor genes, chromosomal and microsatellite instability, alternative splicing alterations, hypermethylation of CpG islands, oxidative stress, impairment of different signaling pathways and energy metabolism. In the present work, we have studied the alterations of alternative splicing patterns of genes related to energy metabolism in CRC...
December 28, 2016: BMC Genomics
https://www.readbyqxmd.com/read/28103588/quantifying-kinetics-from-time-series-of-single-molecule-fret-efficiency-histograms
#12
Stephan Benke, Daniel Nettels, Hagen Hofmann, Benjamin Schuler
Single-molecule fluorescence spectroscopy is a powerful approach for probing biomolecular structure and dynamics, including protein folding. For the investigation of nonequilibrium kinetics, F��rster resonance energy transfer (FRET) in combination with confocal multiparameter detection has proven particularly versatile, owing to the large number of observables and the broad range of accessible timescales, especially in combination with rapid microfluidic mixing. However, a comprehensive kinetic analysis of the resulting time series of transfer efficiency histograms and complementary observables can be challenging owing to the complexity of the data...
January 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28103313/mycobacterium-marinum-degrades-both-triacylglycerols-and-phospholipids-from-its-dictyostelium-host-to-synthesise-its-own-triacylglycerols-and-generate-lipid-inclusions
#13
Caroline Barisch, Thierry Soldati
During a tuberculosis infection and inside lipid-laden foamy macrophages, fatty acids (FAs) and sterols are the major energy and carbon source for Mycobacterium tuberculosis. Mycobacteria can be found both inside a vacuole and the cytosol, but how this impacts their access to lipids is not well appreciated. Lipid droplets (LDs) store FAs in form of triacylglycerols (TAGs) and are energy reservoirs of prokaryotes and eukaryotes. Using the Dictyostelium discoideum/Mycobacterium marinum infection model we showed that M...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28103016/sns2-nanowall-arrays-toward-high-performance-sodium-storage
#14
Peng Zhou, Xiao Wang, Wenhao Guan, Dan Zhang, Libin Fang, Yinzhu Jiang
Cost-effective sodium ion batteries (SIBs) are springing out as desirable alternative choice of lithium ion batteries (LIBs), in terms of application in large-scale energy storage devices. SnS2 is regarded as a potential anode material for SIBs due to its unique layered structure and high theoretical specific capacity. However, the development of SnS2 was hindered by the sluggish kinetics of diffusion process and the inevitable volume change during repeated sodiation/desodiation processes. In this work, SnS2 with a unique nanowall arrays (NWAs) structure is fabricated by one-step pulsed spray evaporation chemical vapor deposition (PSE-CVD), which could be used directly as binder-free and carbon-free anodes for SIBs...
January 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28102948/use-of-parallel-plate-ionization-chambers-in-reference-dosimetry-of-novac-and-liac-%C3%A2-mobile-electron-linear-accelerators-for-intraoperative-radiotherapy-a-multi-center-survey
#15
Paolo Scalchi, Alessia Ciccotelli, Giuseppe Felici, Assunta Petrucci, Raffaella Massafra, Valeria Piazzi, Paola D'Avenia, Francesca Cavagnetto, Federica Cattani, Raffaella Romagnoli, Antonella Soriani
PURPOSE: LIAC(®) and NOVAC are two mobile linear accelerators dedicated to intraoperative radiation therapy (IORT), generating electron beams in the energy range of 3-12 MeV. Due to high dose-per-pulse (up to 70 mGy per pulse), in 2003 the Italian National Institute of Health (ISS) stated that "for the measure of dose to water in reference conditions, ionization chambers cannot be employed and no published dosimetry protocol can be used". As a consequence, ferrous sulphate (or, alternatively alanine) dosimetry was recommended...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102376/insights-into-the-mechanism-of-electrochemical-ozone-production-via-water-splitting-on-the-ni-and-sb-doped-sno2-catalyst
#16
Gregory Gibson, Ziyun Wang, Christopher Hardacre, Wen-Feng Lin
The H2O splitting mechanism is a very attractive alternative used in electrochemistry for the formation of O3. The most efficient catalysts employed for this reaction at room temperature are SnO2-based, in particular the Ni/Sb-SnO2 catalyst. In order to investigate the H2O splitting mechanism density functional theory (DFT) was performed on a Ni/Sb-SnO2 surface with oxygen vacancies. By calculating different SnO2 facets, the (110) facet was deemed most stable, and further doped with Sb and Ni. On this surface, the H2O splitting mechanism was modelled paying particular attention to the final two steps, the formation of O2 and O3...
January 19, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28102374/ethane-c-h-bond-activation-on-the-fe-iv-oxo-species-in-a-zn-based-cluster-of-metal-organic-frameworks-a-density-functional-theory-study
#17
Sarawoot Impeng, Siwarut Siwaipram, Sareeya Bureekaew, Michael Probst
We first investigate the feasibility of designing a Fe-oxo complex for the activation of alkane C-H bonds by (a) incorporating an Fe ion into a Zn-based cluster derived from a metal-organic framework (MOF) and (b) creating the Fe-oxo complex via decomposition of N2O over a Fe(2+)-substituted Zn-based cluster (Fe-Zn3O(pyrazole)6). From the energy profile, it turns out that both steps should be feasible and that the resulting Fe-oxo complex is stable. In the main step, we then investigate the reactivity of this Fe-oxo cluster for the C-H bond cleavage of ethane by calculating the reaction energy profile and analyzing the electronic structure along the relevant steps...
January 19, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28100847/genetic-background-of-aberrant-thermogenin-expression-ucp1-in-obesity-leading-to-metabolic-syndrome
#18
Małgorzata Stosio, Agata Witkowicz, Anna Kowalska, Lidia Karabon
Cardiovascular and metabolic disturbances individually and interdependently lead to chronic pathological conditions observed in cardio-metabolic diseases (CMDs). In Europe, the morbidity and mortality caused by cardiovascular disease are the highest among all diseases. Therefore, it seems important to search for new and alternative therapies for obesity, which is the main cause of type 2 diabetes (T2D) and cardiovascular disease (CD). Great attention has been paid to the role of brown adipose tissue in fat burning and the possibility of transformation of the white adipose tissue to cells with brown adipose tissue function as a potential form of treatment of obesity...
December 31, 2016: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28099171/an-approach-to-estimate-spatial-distribution-of-analyte-within-cells-using-spectrally-resolved-fluorescence-microscopy
#19
Dharmendar Kumar Sharma, Mir Irfanullah, Santanu Kumar Basu, Sheri Madhu, Suman De, Sameer Jadhav, Mangalampalli Ravikanth, Arindam Chowdhury
While fluorescence microscopy has become an essential tool amongst chemists and biologists for the detection of various analyte within cellular environments, non-uniform spatial distribution of sensors within cells often restricts extraction of reliable information on relative abundance of analytes in different subcellular regions. As an alternative to existing sensing methodologies such as ratiometric or FRET imaging, where relative proportion of analyte with respect to the sensor can be obtained within cells, we propose a methodology using spectrally-resolved fluorescence microscopy, via which both the relative abundance of sensor as well as their relative proportion with respect to the analyte can be simultaneously extracted for local subcellular regions...
January 18, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28098975/development-of-spiro-cyclopenta-1-2-b-5-4-b-dithiophene-4-9-fluorene-based-a-%C3%AF-d-%C3%AF-a-small-molecules-with-different-acceptor-units-for-efficient-organic-solar-cells
#20
Wengong Wang, Ping Shen, Xinning Dong, Chao Weng, Guo Wang, Haijun Bin, Jing Zhang, Zhi-Guo Zhang, Yongfang Li
Three acceptor-π-donor-π-acceptor (A-π-D-π-A) small molecules (STFYT, STFRDN, and STFRCN) with spiro[cyclopenta[1,2-b:5,4-b']dithiophene-4,9'-fluorene] (STF) as the central donor unit, terthiophene as the π-conjugated bridge, indenedione, 3-ethylrhodanine, or 2-(1,1-dicyanomethylene)rhodanine as the acceptor unit are designed, synthesized and characterized as electron donor materials in solution-processing organic solar cells (OSCs). The effects of the spiro STF-based central core and different acceptors on the molecular configuration, absorption properties, electronic energy levels, carrier transport properties, the morphology of active layers, and photovoltaic properties are investigated in detail...
January 18, 2017: ACS Applied Materials & Interfaces
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