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https://www.readbyqxmd.com/read/28437770/historical-and-contemporary-metal-budgets-for-a-boreal-shield-lake
#1
Shaun A Watmough
Metal concentrations in sediment cores are widely used to reconstruct metal deposition histories, but rarely have metal budgets based on measured inputs (atmospheric deposition and inflows) and lake outflows been compared with metal fluxes estimated from lake sediment cores. In this study, budgets for six metals (As, Cd, Co, Cu, Ni and Pb) were estimated by measuring inputs in bulk deposition, inputs in the major inflow and export in the lake outflow for one hydrologic year (2002-2003) at Plastic Lake, Ontario, Canada...
April 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28437174/more-than-fever-thermoregulatory-responses-to-immunological-stimulation-and-consequences-of-thermoregulatory-strategy-on-innate-immunity-in-gopher-tortoises-gopherus-polyphemus
#2
Jeffrey M Goessling, Craig Guyer, Mary T Mendonça
Organisms possess a range of thermoregulatory strategies that may vary in response to sickness, thereby driving important life-history consequences. Because the immune system is vital to maintaining organism function, understanding the suite of immune responses to infection indicates basic costs and benefits of physiological strategies. Here, we assessed consequences of thermoregulation and seasonality on immune function in both immunologically stimulated and nonstimulated gopher tortoises (Gopherus polyphemus)...
July 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28437071/revealing-the-initial-reaction-behavior-in-the-continuous-synthesis-of-metal-organic-frameworks-using-real-time-synchrotron-x-ray-analysis
#3
Angelos Polyzoidis, Martin Etter, Michael Herrmann, Stefan Loebbecke, Robert E Dinnebier
In recent years, continuous process technologies have attracted increasing attention, as a means of overcoming limitations in the repeatability and reproducibility of metal-organic framework (MOF) synthesis. Research in this area, however, has neglected to provide insight into the phenomenon leading to the formation of MOFs. In this work, we report the adaption of high-energy synchrotron powder X-ray diffraction analysis to a continuous ZIF-8 production process for online monitoring of the reaction behavior and crystallite formation during the first seconds of the MOF synthesis...
April 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28436542/intercontinental-telehealth-coaching-of-therapists-to-improve-verbalizations-by-children-with-autism
#4
Ana Barkaia, Trevor F Stokes, Tamar Mikiashvili
This study examined the effects of intercontinental telehealth coaching on the mastery of therapists' skills and improvements in verbalizations by children with autism, testing whether telehealth can be a solution for underserved communities in developing countries such as Georgia-Sakartvelo in Eastern Europe. Three therapists delivering and three children with autism receiving early-intervention services from the nongovernmental organization Children of Georgia in Tbilisi participated. Experimenters provided coaching from Virginia, USA to therapists in Georgia-Sakartvelo...
April 24, 2017: Journal of Applied Behavior Analysis
https://www.readbyqxmd.com/read/28436521/well-incorporation-of-carbon-nanodots-with-silicon-nanowire-arrays-featuring-excellent-photocatalytic-performances
#5
Chia-Yun Chen, Po-Hsuan Hsiao, Ta-Cheng Wei, Ting-Chen Chen, Chien-Hsin Tang
Recently, silicon (Si) nanowires have been intensively applied for a wide range of optoelectronic applications. Nevertheless, rare explorations considering the photodegradation of organic pollutants based on Si nanowires were performed, and they still require vast improvement, in particular for their degradation efficiency. In this study, broad-band and high efficiency photocatalytic systems were demonstrated through the good incorporation of Si nanowires with highly fluorescent carbon nanodots. The photodegradation rate of these intriguing heterostructure arrays under a 580 nm light illumination is approximately 6 times higher than that of sole Si nanowires, and more than 3...
April 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28436505/well-defined-functional-mesoporous-silica-polymer-hybrids-prepared-by-an-icar-atrp-technique-integrated-with-bio-inspired-polydopamine-chemistry-for-lithium-isotope-separation
#6
Yuekun Liu, Xuegang Liu, Gang Ye, Yang Song, Fei Liu, Xiaomei Huo, Jing Chen
Mesoporous silica/polymer hybrids with well-preserved mesoporosity were prepared by integrating the initiators for continuous activator regeneration (ICAR) atom transfer radical polymerization (ATRP) technique with the bio-inspired polydopamine (PDA) chemistry. By manipulating the auto-oxidative polymerization of dopamine, uniform PDA layers were deposited on the surfaces and pore walls of ordered mesoporous silicas (OMSs), thereby promoting the immobilization of ATRP initiators. Poly(glycidyl methacrylate) (PGMA) brushes were then grown from the OMSs by using the ICAR ATRP technique...
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436501/bis-zn-ii-salphen-complexes-bearing-pyridyl-functionalized-ligands-for-efficient-organic-light-emitting-diodes-oleds
#7
Jiang Zhao, Feifan Dang, Boao Liu, Yong Wu, Xiaolong Yang, Guijiang Zhou, Zhaoxin Wu, Wai-Yeung Wong
Inspired by the emissive features of Zn(II) complexes based on bis-Schiff base ligands, bis-Zn(II) salphen complexes bearing pyridyl functionalized ligands have been successfully synthesized. Their photophysical features, electrochemical behavior and electroluminescent (EL) properties have been investigated in detail. The functionalized bis-Zn(II) salphen complexes can exhibit high thermal stability up to 417 °C, and their photoluminescence (PL) spectra show a maximal emission wavelength peak at ca. 565 nm both in solution and PMMA doped films...
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436192/predictors-of-non-pharmacological-intervention-effect-on-cognitive-function-and-behavioral-and-psychological-symptoms-of-older-people-with-dementia
#8
Ting-Jung Hsu, Hui-Te Tsai, An-Chun Hwang, Liang-Yu Chen, Liang-Kung Chen
AIM: Our previous work showed that non-pharmacological interventions could effectively reduce the severity of behavioral and psychological symptoms of dementia (BPSD), while the factors influencing the effect of intervention were less explored. Therefore, the main purpose of the present study was to investigate the predictors of the non-pharmacological intervention effect for old veterans with dementia and BPSD. METHODS: A total of 141 old veterans with dementia living in two veterans' homes in northern Taiwan were recruited...
April 2017: Geriatrics & Gerontology International
https://www.readbyqxmd.com/read/28435966/water-structuring-above-solutes-with-planar-hydrophobic-surfaces
#9
Udo Schnupf, John W Brady
Many important biological solutes possess not only polar and hydrogen bonding functionalities, but also weakly-hydrating, or hydrophobic, surfaces. Theories of the hydration of such surfaces predict that their solvent interactions will change from a wetting type interaction to a dewetting regime as a function of the solute size, with a gradual transition in behavior taking place around characteristic lengths of ∼1 nm. Aggregations of non-polar species over this size range will undergo a transition from being dominated by entropy to being dominated by enthalpy...
April 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28435337/treatment-strategies-for-the-female-athlete-triad-in-the-adolescent-athlete-current-perspectives
#10
REVIEW
Jill Thein-Nissenbaum, Erin Hammer
Since the passage of Title IX in 1972, female sports participation has dramatically increased. The benefits of physical activity, including decreased risk for heart disease and diabetes as well as improved body image and self-esteem, far outweigh the risks. However, a select population of adolescent and young adult females may experience symptoms related to the female athlete triad (Triad), which refers to the interrelatedness of energy availability, menstrual function, and bone mineral density (BMD). These conditions often manifest clinically as disordered eating behaviors, menstrual irregularity, and stress fractures; an individual may suffer from 1 or all of the Triad components simultaneously...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/28434998/use-of-two-photon-microscopy-to-study-leishmania-major-infection-of-the-skin
#11
REVIEW
Matheus Batista Carneiro, Leah Shan Hohman, Jackson G Egen, Nathan C Peters
Intra-vital two-photon microscopy (2P-IVM) allows for in-situ investigation of tissue organization, cell behavior and the dynamic interactions between different cell types in their natural environment. This methodology has also expanded our understanding of the immune response against pathogens. Leishmania are protozoan intracellular parasites that have adapted to successfully establish infection within the context of an inflammatory response in the skin following transmission by the bite of an infected sand fly...
April 18, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28434992/promising-techniques-to-illuminate-neuromodulatory-control-of-the-cerebral-cortex-in-sleeping-and-waking-states
#12
REVIEW
Takeshi Kanda, Kaoru Ohyama, Hiroki Muramoto, Nami Kitajima, Hiroshi Sekiya
Sleep, a common event in daily life, has clear benefits for brain function, but what goes on in the brain when we sleep remains unclear. Sleep was long regarded as a silent state of the brain because the brain seemingly lacks interaction with the surroundings during sleep. Since the discovery of electrical activities in the brain at rest, electrophysiological methods have revealed novel concepts in sleep research. During sleep, the brain generates oscillatory activities that represent characteristic states of sleep...
April 20, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28434970/transfer-of-c-terminal-residues-of-human-apolipoprotein-a-i-to-insect-apolipophorin-iii-creates-a-two-domain-chimeric-protein-with-enhanced-lipid-binding-activity
#13
James V C Horn, Rachel A Ellena, Jesse J Tran, Wendy H J Beck, Vasanthy Narayanaswami, Paul M M Weers
Apolipophorin III (apoLp-III) is an insect apolipoprotein (18kDa) that comprises a single five-helix bundle domain. In contrast, human apolipoprotein A-I (apoA-I) is a 28kDa two-domain protein: an α-helical N-terminal domain (residues 1-189) and a less structured C-terminal domain (residues 190-243). To better understand the apolipoprotein domain organization, a novel chimeric protein was engineered by attaching residues 179 to 243 of apoA-I to the C-terminal end of apoLp-III. The apoLp-III/apoA-I chimera was successfully expressed and purified in E...
April 20, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28434864/sensorimotor-representations-in-cerebellar-granule-cells-in-larval-zebrafish-are-dense-spatially-organized-and-non-temporally-patterned
#14
Laura D Knogler, Daniil A Markov, Elena I Dragomir, Vilim Štih, Ruben Portugues
A fundamental question in neurobiology is how animals integrate external sensory information from their environment with self-generated motor and sensory signals in order to guide motor behavior and adaptation. The cerebellum is a vertebrate hindbrain region where all of these signals converge and that has been implicated in the acquisition, coordination, and calibration of motor activity. Theories of cerebellar function postulate that granule cells encode a variety of sensorimotor signals in the cerebellar input layer...
April 14, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28434800/medial-entorhinal-cortex-selectively-supports-temporal-coding-by-hippocampal-neurons
#15
Nick T M Robinson, James B Priestley, Jon W Rueckemann, Aaron D Garcia, Vittoria A Smeglin, Francesca A Marino, Howard Eichenbaum
Recent studies have shown that hippocampal "time cells" code for sequential moments in temporally organized experiences. However, it is currently unknown whether these temporal firing patterns critically rely on upstream cortical input. Here we employ an optogenetic approach to explore the effect of large-scale inactivation of the medial entorhinal cortex on temporal, as well as spatial and object, coding by hippocampal CA1 neurons. Medial entorhinal inactivation produced a specific deficit in temporal coding in CA1 and resulted in significant impairment in memory across a temporal delay...
April 13, 2017: Neuron
https://www.readbyqxmd.com/read/28434794/behavioral-and-physiological-responses-of-yellow-perch-perca-flavescens-to-moderate-hypoxia
#16
L Zoe Almeida, Samuel C Guffey, Maria S Sepúlveda, Tomas O Höök
While severe hypoxia can be lethal and is usually avoided by mobile aquatic organisms, moderate hypoxic conditions are likely more prevalent and may affect organisms, such as fishes, in a variety of systems. However, fishes have the potential to adjust physiologically and behaviorally and thus reduce the negative effects of hypoxia. Quantifying such physiological responses may shed light on the ability of fishes to tolerate reduced oxygen concentrations. This study assessed how two different hatchery populations of yellow perch Perca flavescens, a fish that is likely to encounter moderate hypoxic conditions in a variety of systems, responded to moderate hypoxic exposure through three experiments: 1) a behavioral foraging experiment, 2) an acute exposure experiment, and 3) a chronic exposure experiment...
April 18, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28434591/oxytocin-and-vasopressin-neural-networks-implications-for-social-behavioral-diversity-and-translational-neuroscience
#17
REVIEW
Zachary V Johnson, Larry J Young
Oxytocin- and vasopressin-related systems are present in invertebrate and vertebrate bilaterian animals, including humans, and exhibit conserved neuroanatomical and functional properties. In vertebrates, these systems innervate conserved neural networks that regulate social learning and behavior, including conspecific recognition, social attachment, and parental behavior. Individual and species-level variation in central organization of oxytocin and vasopressin systems has been linked to individual and species variation in social learning and behavior...
May 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28434428/local-response-of-sialoliths-to-lithotripsy-cues-on-fragmentation-outcome
#18
Pedro Nolasco, Ana J Dos Anjos, José Dias, Paulo V Coelho, Carla Coelho, Manuel Evaristo, Albano Cavaleiro, António Maurício, Manuel F C Pereira, Virgínia Infante, António P Alves de Matos, Raúl C Martins, Patricia A Carvalho
Lithotripsy methods show relatively low efficiency in the fragmentation of sialoliths compared with the success rates achieved in the destruction of renal calculi. However, the information available on the mechanical behavior of sialoliths is limited and their apparently tougher response is not fully understood. This work evaluates the hardness and Young's modulus of sialoliths at different scales and analyzes specific damage patterns induced in these calcified structures by ultrasonic vibrations, pneumoballistic impacts, shock waves, and laser ablation...
April 24, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28433582/effects-of-twenty-standard-amino-acids-on-biochemical-constituents-docosahexaenoic-acid-production-and-metabolic-activity-changes-of-crypthecodinium-cohnii
#19
Waseem Safdar, Xinyi Zan, Muhammad Shamoon, Hafiz Rizwan Sharif, Omar Mukama, Xin Tang, Yuanda Song
The influence of 20 standard amino acids was investigated on growth, lipid accumulation, docosahexaenoic acid (DHA) production and cell biochemical composition of Crypthecodinium cohnii. C. cohnii efficiently utilize organic nitrogen (predominantly threonine and to a lesser extent tyrosine and serine) as compared to inorganic nitrogen (NH4)2SO4. However, No significant effect was observed on major biochemical composition of C. cohnii (lipids, carbohydrates and proteins) under N limitation or supplementation with different N-sources...
April 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28433417/mechanistic-insights-into-epigenetic-modulation-of-ethanol-consumption
#20
Igor Ponomarev, Claire E Stelly, Hitoshi Morikawa, Yuri A Blednov, R Dayne Mayfield, R Adron Harris
There is growing evidence that small-molecule inhibitors of epigenetic modulators, such as histone deacetylases (HDAC) and DNA methyltransferases (DNMT), can reduce voluntary ethanol consumption in animal models, but molecular and cellular processes underlying this behavioral effect are poorly understood. We used C57BL/6J male mice to investigate the effects of two FDA-approved drugs, decitabine (a DNMT inhibitor) and SAHA (an HDAC inhibitor), on ethanol consumption using two tests: binge-like drinking in the dark (DID) and chronic intermittent every other day (EOD) drinking...
March 12, 2017: Alcohol
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