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https://www.readbyqxmd.com/read/28433002/changes-in-microstructure-of-two-ammonium-based-protic-ionic-liquids-proved-by-in-situ-variable-temperature-1-h-nmr-spectroscopy-influence-of-anion
#1
Xiaochen Tang, Yingjie Xu, Xiao Zhu, Yueqing Lu
In this work, changes in microstructure of two protic ionic liquids (PILs), namely n-butylammonium acetate (N4Ac) and n-butylammonium nitrate (N4NO3 ) are proved by in situ variable-temperature (1) H NMR spectroscopy at the temperature range from 25 °C to 115 °C, and the influence of the nature of anion is discussed accordingly. The results demonstrate that (1) H NMR chemical shifts of alkyl protons of both N4Ac and N4NO3 are almost not changed with the increasing of temperature, due to the absence of hydrogen bond interaction between alkyl protons with anions...
April 22, 2017: Magnetic Resonance in Chemistry: MRC
https://www.readbyqxmd.com/read/28432972/assessment-of-the-bioavailability-and-depuration-of-uranium-cesium-and-thorium-in-snails-cantareus-aspersus-using-kinetics-models
#2
B Pauget, A Villeneuve, P O Redon, A Cuvier, A de Vaufleury
Uranium ore waste has led to soil contamination that may affect both environmental and soil health. To analyze the risk of metal transfer, metal bioavailability must be estimated by measuring biological parameters. Kinetic studies allow taking into account the dynamic mechanisms of bioavailability, as well as the steady state concentration in organisms necessary to take into account for relevant risk assessment. In this way, this work aims to model the snail accumulation and excretion kinetics of uranium (U), cesium (Cs) and thorium (Th)...
April 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28432958/membrane-fusion-between-baculovirus-budded-virus-enveloped-particles-and-giant-liposomes-generated-using-a-droplet-transfer-method-for-the-incorporation-of-recombinant-membrane-proteins
#3
Misako Nishigami, Takaaki Mori, Masahiro Tomita, Kingo Takiguchi, Kanta Tsumoto
Giant proteoliposomes are generally useful as artificial cell membranes in biochemical and biophysical studies, and various procedures for their preparation have been reported. We present here a novel preparation technique that involves the combination of i) cell-sized lipid vesicles (giant unilamellar vesicles, GUVs) that are generated using the droplet-transfer method, where lipid monolayer-coated water-in-oil microemulsion droplets interact with oil/water interfaces to form enclosed bilayer vesicles, and ii) budded viruses (BVs) of baculovirus (Autographa californica nucleopolyhedrovirus) that express recombinant transmembrane proteins on their envelopes...
April 13, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28432907/assessment-of-field-re-entry-exposure-to-pesticides-a-dislodgeable-foliar-residue-study
#4
Konstantinos M Kasiotis, Angelos N Tsakirakis, C Richard Glass, Agathi N Charistou, Pelagia Anastassiadou, Rianda Gerritsen-Ebben, Kyriaki Machera
A dislodgeable foliar residue study was conducted in greenhouse pepper and tomato on the island of Crete, Greece, following the spray application of an SC insecticide (with active substance (a.s.) tebufenozide) and an EC fungicide (a.s. bupirimate). Furthermore, for the assessment of worker exposure to pesticides - as a result of re-entering the treated crops - a worker dermal exposure study was carried out during the tasks of tying or pruning, which allowed the transfer coefficient values for the specific tasks to be determined...
April 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28432653/analyzing-glycopeptide-isomers-by-combining-differential-mobility-spectrometry-with-electron-and-collision-based-tandem-mass-spectrometry
#5
J Larry Campbell, Takashi Baba, Chang Liu, Catherine S Lane, J C Yves Le Blanc, James W Hager
Differential mobility spectrometry (DMS) has been employed to separate isomeric species in several studies. Under the right conditions, factors such as separation voltage, temperature, the presence of chemical modifiers, and residence time can combine to provide unique signal channels for isomeric species. In this study, we examined a set of glycopeptide isomers, MUC5AC-3 and MUC5AC-13, which bear an N-acetyl-galactosamine (GalNAc) group on either threonine-3 or threonine-13. When analyzed as a mixture, the resulting MS and MS/MS spectra yield fragmentation patterns that cannot discern these convolved species...
April 21, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/28432594/microrna-transfer-between-bone-marrow-adipose-and-multiple-myeloma-cells
#6
REVIEW
Luna Soley, Carolyne Falank, Michaela R Reagan
PURPOSE OF REVIEW: Multiple myeloma remains an incurable disease, largely due to the tumor-supportive role of the bone marrow microenvironment. Bone marrow adipose tissue (BMAT) is one component of the fertile microenvironment which is believed to contribute to myeloma progression and drug resistance, as well as participate in a vicious cycle of osteolysis and tumor growth. RECENT FINDINGS: MicroRNAs (miRNAs) have recently emerged as instrumental regulators of cellular processes that enable the development and dissemination of cancer...
April 21, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28432507/study-of-the-potential-of-barnyard-grass-for-the-remediation-of-cd-and-pb-contaminated-soil
#7
Jianling Xu, Qiongyao Cai, Hanxi Wang, Xuejun Liu, Jing Lv, Difu Yao, Yue Lu, Wei Li, Yuanyuan Liu
In this study, the microwave digestion method was used to determine total cadmium (Cd) and lead (Pb) concentrations, the BCR method was used to determine different states of Cd and Pb, and atomic absorption spectroscopy (AAS) and inductively coupled plasma optical emission spectrometry (ICP-OES) were used to determine Cd and Pb concentrations in simulated soil and barnyard grass before and after planting barnyard grass to provide a theoretical basis for the remediation of Cd- and Pb-contaminated soil. The results showed that the bioconcentration factor changes with different Cd concentrations are relatively complex and that the removal rate increases regularly...
May 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28432418/-because-we-feel-we-have-to-do-something-barriers-in-the-prevention-of-violence-and-key-areas-requiring-action-a%C3%A2-qualitative-interview-study-with-professional-nurses-and-managers-in-the-field-of-elderly-care
#8
Melanie Siegel, Yuliya Mazheika, Regina Mennicken, Stefanie Ritz-Timme, Hildegard Graß, Britta Gahr
BACKGROUND: In recent years, politics and society have shown an increasing interest in the prevention of violence. Despite the scientific studies and prevention programs that have been conducted over the past few years, there is no indication that the prevalence of violence in elderly care is falling. A high number of unreported cases may still be assumed. OBJECTIVE: The present study examined the barriers in transferring research knowledge into practice. Furthermore, it dealt with the requirements of an interventional approach which is practical and which effectively addresses the barriers...
April 21, 2017: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/28432349/augmentation-of-working-memory-training-by-transcranial-direct-current-stimulation-tdcs
#9
Steffen Philipp Ruf, Andreas J Fallgatter, Christian Plewnia
Transcranial direct current stimulation (tDCS) to the dorsolateral prefrontal cortex (dlPFC) can modulate working memory (WM) performance. However, evidence regarding the enhancement of WM training, its sustainability and transferability is ambiguous. Since WM functioning appears to be lateralized in respect to stimulus characteristics, this study examined the difference between task-congruent (spatial-right, verbal-left), task-incongruent (spatial-left, verbal-right) and sham tDCS in regards to the efficacy of WM training...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432316/how-visual-experience-impacts-the-internal-and-external-spatial-mapping-of-sensorimotor-functions
#10
Virginie Crollen, Geneviève Albouy, Franco Lepore, Olivier Collignon
Tactile perception and motor production share the use of internally- and externally-defined coordinates. In order to examine how visual experience affects the internal/external coding of space for touch and movement, early blind (EB) and sighted controls (SC) took part in two experiments. In experiment 1, participants were required to perform a Temporal Order Judgment task (TOJ), either with their hands in parallel or crossed over the body midline. Confirming previous demonstration, crossing the hands led to a significant decrement in performance in SC but did not affect EB...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432306/simple-rectangular-gratings-as-a-near-field-anti-reflection-pattern-for-gasb-tpv-cells
#11
Haitong Yu, Dong Liu, Zhen Yang, Yuanyuan Duan
We show theoretically that 2D rectangular gratings on the surface of GaSb can serve as an "anti-reflection" pattern for nano-gap thermophotovoltaic (TPV) devices, which significantly enhances near-field radiative flux from the emitter to a GaSb cell, thus improving output power and conversion efficiency. The system in this study is a 200-nm gap TPV power generation system with a planar infrared plasmonic emitter and GaSb cell. Rigorous coupled-wave analysis is used to calculate the spectral near-field radiative flux involving periodic structures...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432194/diagnostic-value-of-prehospital-ecg-in-acute-stroke-patients
#12
Tobias Bobinger, Bernd Kallmünzer, Markus Kopp, Natalia Kurka, Martin Arnold, Stefan Heider, Stefan Schwab, Martin Köhrmann
OBJECTIVE: To investigate the diagnostic yield of prehospital ECG monitoring provided by emergency medical services in the case of suspected stroke. METHODS: Consecutive patients with acute stroke admitted to our tertiary stroke center via emergency medical services and with available prehospital ECG were prospectively included during a 12-month study period. We assessed prehospital ECG recordings and compared the results to regular 12-lead ECG on admission and after continuous ECG monitoring at the stroke unit...
April 21, 2017: Neurology
https://www.readbyqxmd.com/read/28432104/dancing-attraction-followers-of-honey-bee-tremble-and-waggle-dances-exhibit-similar-behaviors
#13
Calvin Lam, Yanlei Li, Tim Landgraf, James Nieh
The function of the honey bee tremble dance and how it attracts signal receivers is poorly understood. We tested the hypothesis that tremble followers and waggle followers exhibit the same dance following behavior. If correct, this would unify our understanding of dance following, provide insight into dance information transfer, and offer a way to identify the signal receivers of tremble dance information. Followers showed similar initial attraction to and tracking of dancers. However, waggle dancers were faster than tremble dancers, and follower forward, sideways, and angular velocities were generally similar to the velocities of their respective dancers...
April 21, 2017: Biology Open
https://www.readbyqxmd.com/read/28432097/diazotrophy-overcomes-the-deleterious-growth-phenotype-of-glne-deletion-in-azotobacter-vinelandii
#14
Florence Mus, Alex Tseng, Ray Dixon, John W Peters
Overcoming the inhibitory effects of excess environmental ammonium on nitrogenase synthesis or activity, or preventing ammonium assimilation, have both been considered as strategies to increase the amount of fixed nitrogen transferred from bacterial to plant partners in associative or symbiotic plant-diazotroph relationships. The GlnE adenylyltransferase/adenylyl-removing enzyme catalyzes reversible adenylylation of glutamine synthetase (GS), thereby affecting the post translational regulation of ammonium assimilation critical for appropriate coordination of carbon and nitrogen assimilation...
April 21, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28432094/the-use-of-synthetic-hybrid-strains-to-determine-the-role-of-replicon-3-in-virulence-of-the-burkholderia-cepacia-complex
#15
Kirsty Agnoli, Roman Freitag, Margarida C Gomes, Christian Jenul, Angela Suppiger, Olga Mannweiler, Carmen Frauenknecht, Daniel Janser, Annette C Vergunst, Leo Eberl
The Burkholderia cepacia complex (Bcc) displays a wealth of metabolic diversity with great biotechnological potential, but the utilisation of these bacteria is limited by their opportunistic pathogenicity to humans. The third replicon of the Bcc, megaplasmid pC3 (0.5 to 1.4 Mb, previously chromosome 3), is important for various phenotypes, including virulence, antifungal and proteolytic activities, and the utilization of certain substrates. Approximately half of plasmid pC3 is well-conserved throughout sequenced Bcc members, while the other half is not...
April 21, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28432093/diversity-of-integrative-and-conjugative-elements-of-streptococcus-salivarius-and-their-intra-and-interspecies-transfer
#16
Narimane Dahmane, Virginie Libante, Florence Charron-Bourgoin, Eric Guédon, Gérard Guédon, Nathalie Leblond-Bourget, Sophie Payot
Integrative and Conjugative Elements (ICEs) are widespread chromosomal mobile genetic elements, which can transfer autonomously by conjugation in bacteria. Thirteen ICEs with a conjugation module closely related to that of ICESt3 of Streptococcus thermophilus were characterized in Streptococcus salivarius by whole genome sequencing. Sequence comparison highlighted ICE evolution by shuffling of 3 different integration/excision modules (for integration in the 3' end of fda, rpsI or rpmG genes) with the conjugation module of the ICESt3 subfamily...
April 21, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28432065/adoptive-t-cell-transfer-targets-viral-and-nonviral-tumor-antigens
#17
(no author information available yet)
Successful T-cell therapy targets nonviral tumor antigens in patients with HPV(+) cervical cancer.
April 21, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28432042/syndrome-of-inappropriate-antidiuretic-hormone-accompanied-by-bilateral-hypothalamic-and-anterior-thalamic-lesions-with-serum-antiaquaporin-4-antibody
#18
Kosuke Inoue, Takahiro Nakayama, Aya Kamisawa, Jun Saito
We described a rare case of the syndrome of inappropriate antidiuretic hormone secretion (SIADH) and severe unconsciousness accompanied by bilateral hypothalamic and anterior thalamic lesions with positive serum antiaquaporin 4 (AQP4) antibody. A 29-year-old man was admitted to our hospital due to the subacute progression of an unconscious state. He was observed to be hyponatraemic secondary to SIADH. Brain MRI showed bilateral hypothalamic and anterior thalamic lesions. Anti-AQP4 antibody was detected in his serum...
April 20, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28432031/membrane-lipid-replacement-for-chronic-illnesses-aging-and-cancer-using-oral-glycerolphospholipid-formulations-with-fructooligosaccharides-to-restore-phospholipid-function-in-cellular-membranes-organelles-cells-and-tissues
#19
REVIEW
Garth L Nicolson, Michael E Ash
Membrane Lipid Replacement is the use of functional, oral supplements containing mixtures of cell membrane glycerolphospholipids, plus fructooligosaccharides (for protection against oxidative, bile acid and enzymatic damage) and antioxidants, in order to safely replace damaged, oxidized, membrane phospholipids and restore membrane, organelle, cellular and organ function. Defects in cellular and intracellular membranes are characteristic of all chronic medical conditions, including cancer, and normal processes, such as aging...
April 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28432021/the-er-phagosome-connection-in-the-era-of-membrane-contact-sites
#20
REVIEW
Paula Nunes-Hasler, Nicolas Demaurex
Phagocytosis is an essential mechanism through which innate immune cells ingest foreign material that is either destroyed or used to generate and present antigens and initiate adaptive immune responses. While a role for the ER during phagosome biogenesis has been recognized, whether fusion with ER cisternae or vesicular derivatives occurs has been the source of much contention. Membrane contact sites (MCS) are tight appositions between ER membranes and various organelles that coordinate multiple functions including localized signalling, lipid transfer and trafficking...
April 18, 2017: Biochimica et Biophysica Acta
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