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https://www.readbyqxmd.com/read/28636233/green-synthesis-of-small-nanoparticles-of-a2sif6-a-li-cs-using-ionic-liquids-as-solvent-and-fluorine-source-a-novel-simple-approach-without-hf
#1
Jacob Olchowka, Markus Suta, Claudia Wickleder
In this communication, nanoparticles of the fluoridosilicates A2SiF6 (A= Li, Na, K, Rb, Cs), which are extremely promising host lattices for future LEDs, are presented for the first time. The preparation method we introduces here is a very simple and energy and time saving one, moreover the usage of toxic HF or elemental fluorine is avoided. In detail, the ionic liquid [Bmim]PF6 was used both as solvent and fluoride source in an ionothermally assisted microwave synthesis. The small size of the so obtained nanoparticles is of huge relevance for their applications as thin films or coverage of surfaces for, e...
June 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28636182/effects-of-green-tea-on-lipid-metabolism-in-overweight-or-obese-people-a-meta-analysis-of-randomized-controlled-trials
#2
Yuan Fen, Dong Hui, Fang Ke, Gong Jing, Lu Fu Er
SCOPE: The effects of green tea on lipid metabolism were inconsistent. The objective of this meta-analysis was to evaluate the effects of green tea on lipid metabolism in overweight or obese people. METHODS AND RESULTS: We searched randomized controlled trials(RCTs) comparing green tea with a control on lipid metabolism on PUBMED and WEB OF SCIENCE (January 1990 to September 2016), COCHRANE and EMBASE (updated to October 2016), and the Chinese databases CNKI, WanFang and CBMD...
June 21, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28636161/infinity-sperm-storage-the-gift-that-keeps-on-giving
#3
Gauthier Schang, Beatriz Fernandez-Fuertes, Samantha C Lean, Alexandra L Nguyen, Osvaldo Bogado Pascottini
Female Drosophila retain sperm for up to two weeks post-copulation in a network of storage organs includng the bursa, the seminal receptacle, and the spermathecae. This image shows the seminal receptacle of a Drosophila melanogaster female, 2-hrs post-copulation between a LHM (wild-type) female with a Protamine B (green), β-Tubulin (blue) fluorescently tagged male, whose sperm can be visualized within the female. This 'infinity' structure of the seminal receptacle resembles the tubular coil that allows for the storage of very long sperm relative to female body size -up to 20 times the length of the female in some Drosophila species...
June 21, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28636152/dynamics-and-origin-of-cytokinins-involved-in-plant-manipulation-by-a-leaf-mining-insect
#4
Hui Zhang, Antoine Guiguet, Géraldine Dubreuil, Anna Kisiala, Peter Andreas, R J Neil Emery, Elisabeth Huguet, Mélanie Body, David Giron
Several herbivorous insects and plant-associated microorganisms control the phytohormonal balance, thus enabling them to successfully exploit the plant by inhibiting plant defences and withdrawing plant resources for their own benefit. The leaf-mining moth Phyllonorycter blancardella modifies the cytokinin (CK) profile of mined leaf-tissues, and the insect symbiotic bacteria Wolbachia is involved in the plant manipulation to the benefit of the insect host. To gain a deeper understanding into the possible origin and dynamics of CKs, we conducted an extensive characterization of CKs in larvae and in infected apple leaves...
June 21, 2017: Insect Science
https://www.readbyqxmd.com/read/28636112/fluorescent-carbon-nanoparticles-obtained-from-charcoal-via-green-methods-and-their-application-for-sensing-fe-3-in-an-aqueous-medium
#5
Rajesh Patidar, Babulal Rebary, Dhruti A Sanghani, Gopala Ram Bhadu, Parimal Paul
Two green methods (microwave and hydrothermal) were employed for the preparation of water dispersible fluorescent carbon nanoparticles (CNPs) from activated charcoal. Microwave and hydrothermally synthesized carbon nanoparticles, (MW-CNPs) and (HT-CNPs), respectively were characterized by microscopic and spectroscopic techniques. A detailed study of their fluorescence characteristics was made. MW-CNPs and HT-CNPs were tested for metal ion selectivity in aqueous medium. MW-CNPs showed selectivity for Fe(3+) among the tested metal ions and important studies such as for interference, linear range and limit of detection were carried out...
June 21, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28636039/a-convenient-method-for-multicolour-labelling-of-proteins-with-bodipy-fluorophores-via-tyrosine-residues
#6
Miffy H Y Cheng, Huguette Savoie, Francesca Bryden, Ross W Boyle
Fluorescence is an essential imaging modality for labelling and visualising cells and sub-cellular structures. Multicolour labelling is especially challenging due to differences in physicochemical and photophysical behaviour of structurally unrelated fluorophores in the heterogeneous environments found in sub-cellular compartments. Herein, we report the conjugation of three azide-bearing BODIPYs with similar core structures but widely different emission wavelengths (green, red and NIR) to tyrosine residues of a model globular protein (BSA) via a common linking methodology...
June 21, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28636032/reline-aqueous-solutions-behaving-as-liquid-mixtures-of-h-bonded-co-solvents-microphase-segregation-and-formation-of-co-continuous-structures-as-indicated-by-brillouin-and-1-h-nmr-spectroscopies
#7
E Posada, N López-Salas, R J Jiménez Riobóo, M L Ferrer, M C Gutiérrez, F Del Monte
Deep eutectic solvents (DESs) offer a suitable alternative to conventional solvents in terms of both performance and cost-effectiveness. Some DESs also offer certain green features, the greenness of which is notoriously enhanced when combined with water. Aqueous DES dilutions are therefore attracting great attention as a novel green medium for biotechnological processes, with the aqueous dilutions of reline - a DES composed of urea and choline chloride - being one of the most studied systems. Despite their macroscopic homogeneous appearance, both (1)H NMR spectroscopic studies and molecular dynamics simulations have revealed the occurrence of certain dynamic heterogeneity at a microscopic molecular level...
June 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28635650/the-application-of-heptamethine-cyanine-dye-dz-1-and-indocyanine-green-for-imaging-and-targeting-in-xenograft-models-of-hepatocellular-carcinoma
#8
Caiqin Zhang, Yong Zhao, He Zhang, Xue Chen, Ningning Zhao, Dengxu Tan, Hai Zhang, Changhong Shi
Near infrared fluorescence (NIRF) imaging has strong potential for widespread use in noninvasive tumor imaging. Indocyanine green (ICG) is the only Food and Drug Administration (FDA) -approved NIRF dye for clinical diagnosis; however, it is unstable and poorly targets tumors. DZ-1 is a novel heptamethine cyanine NIRF dye, suitable for imaging and tumor targeting. Here, we compared the fluorescence intensity and metabolism of DZ-1 and ICG. Additionally, we assayed their specificities and abilities to target tumor cells, using cultured hepatocellular carcinoma (HCC) cell lines, a nude mouse subcutaneous xenograft model of liver cancer, and a rabbit orthotopic transplantation model...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28635622/the-arabidopsis-gpr1-gene-negatively-affects-pollen-germination-pollen-tube-growth-and-gametophyte-senescence
#9
Xiao Yang, Qinying Zhang, Kun Zhao, Qiong Luo, Shuguang Bao, Huabin Liu, Shuzhen Men
Genes essential for gametophyte development and fertilization have been identified and studied in detail; however, genes that fine-tune these processes are largely unknown. Here, we characterized an unknown Arabidopsis gene, GTP-BINDING PROTEIN RELATED1 (GPR1). GPR1 is specifically expressed in ovule, pollen, and pollen tube. Enhanced green fluorescent protein-tagged GPR1 localizes to both nucleus and cytoplasm, and it also presents in punctate and ring-like structures. gpr1 mutants exhibit no defect in gametogenesis and seed setting, except that their pollen grains are pale in color...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28635621/the-charge-and-spin-transport-properties-in-hexagonal-silicene-nanorings
#10
Ning Xu, Haiyang Zhang, Xiuqiang Wu, Chen Qiao, Jian-Wen Ding
Based on the tight-binding model, charge and spin transport properties of hexagonal silicene rings are investigated within the nonequilibrium Green's function technique. The effects of external electric, magnetic and exchange fields are taken into account. The calculated results reveal that the hexagonal silicene nanorings act as a controllable spin filter. The near-perfect spin polarization can be achieved by adjusting electric, magnetic and exchange fields. The calculated results offer new possibilities for silicene ring based spin nanodevices...
June 21, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28634749/the-king-laryngeal-tube-a-mimic-of-esophageal-intubation-in-the-emergency-department
#11
Daniel B Green, Christopher W Root, Ian R Drexler, Alan C Legasto, Jonathan St George
The King Airway is a temporary airway device used primarily in the pre-hospital setting and typically exchanged for an endotracheal tube upon arrival to the emergency department. Since this usually occurs before imaging, many radiologists are unfamiliar with the King Airway. This lack of familiarity can have important consequences for the patient and treating team. The purpose of this article is to raise awareness of the King Airway among radiologists, emphasize appropriate positioning, and review the imaging complications of incorrect positioning...
June 20, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28634596/study-on-drive-system-of-hybrid-tree-harvester
#12
Shen Rong-Feng, Zhang Xiaozhen, Zhou Chengjun
Hybrid tree harvester with a 60 kW diesel engine combined with a battery pile could be a "green" forest harvesting and transportation system. With the new design, the diesel engine maintains a constant engine speed, keeping fuel consumption low while charging the batteries that drive the forwarder. As an additional energy saving method, the electric motors work as generators to charge the battery pile when the vehicle moves downhill. The vehicle is equipped with six large wheels providing high clearance over uneven terrain while reducing ground pressure...
2017: TheScientificWorldJournal
https://www.readbyqxmd.com/read/28634583/circular-rnas-biogenesis-function-and-role-in-human-diseases
#13
REVIEW
John Greene, Anne-Marie Baird, Lauren Brady, Marvin Lim, Steven G Gray, Raymond McDermott, Stephen P Finn
Circular RNAs (circRNAs) are currently classed as non-coding RNA (ncRNA) that, unlike linear RNAs, form covalently closed continuous loops and act as gene regulators in mammals. They were originally thought to represent errors in splicing and considered to be of low abundance, however, there is now an increased appreciation of their important function in gene regulation. circRNAs are differentially generated by backsplicing of exons or from lariat introns. Unlike linear RNA, the 3' and 5' ends normally present in an RNA molecule have been joined together by covalent bonds leading to circularization...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28634224/igh-myc-translocation-associates-with-brca2-deficiency-and-synthetic-lethality-to-parp1-inhibitors
#14
Silvia Maifrede, Kayla Martin, Paulina Podszywalow-Bartnicka, Katherine Sullivan, Samantha K Langer, Reza Nejadi, Yashodhara Dasgupta, Michael Hulse, Daniel Gritsyuk, Margaret Nieborowska-Skorska, Lena N Lupey-Green, Huaqing Zhao, Katarzyna Piwocka, Mariusz A Wasik, Italo Tempera, Tomasz Skorski
Burkitt lymphoma/leukemia (BL) cells carry t(8;14)(q24;q32) chromosomal translocation encoding IGH/MYC, which results in the constitutive expression of the MYC oncogene. Here, it is demonstrated that untreated and cytarabine (AraC)-treated IGH/MYC-positive BL cells accumulate a high number of potentially lethal DNA double-strand breaks (DSBs) and display low levels of the BRCA2 tumor suppressor protein, which is a key element of homologous recombination (HR)-mediated DSB repair. BRCA2 deficiency in IGH/MYC-positive cells was associated with diminished HR activity and hypersensitivity to poly (ADP-ribose) polymerase-1 (PARP1) inhibitors (olaparib, talazoparib) used alone or in combination with cytarabine in vitro...
June 20, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28634208/ligand-and-voltage-gated-ca-2-channels-differentially-regulate-the-mode-of-vesicular-neuropeptide-release-in-mammalian-sensory-neurons
#15
Yeshi Wang, Qihui Wu, Meiqin Hu, Bin Liu, Zuying Chai, Rong Huang, Yuan Wang, Huadong Xu, Li Zhou, Lianghong Zheng, Changhe Wang, Zhuan Zhou
Neuropeptides released from dorsal root ganglion (DRG) neurons play essential roles in the neurotransmission of sensory inputs, including those underlying nociception and pathological pain. Neuropeptides are released from intracellular vesicles through two modes: a partial release mode called "kiss-and-run" (KAR) and a full release mode called "full fusion-like" (FFL). Using total internal reflection fluorescence (TIRF) microscopy, we traced the release of pH-sensitive green fluorescent protein-tagged neuropeptide Y (pHluorin-NPY) from individual dense-core vesicles in the soma and axon of single DRG neurons after Ca(2+) influx through either voltage-gated Ca(2+) channels (VGCCs) or ligand-gated transient receptor potential vanilloid 1 (TRPV1) channels...
June 20, 2017: Science Signaling
https://www.readbyqxmd.com/read/28634138/intracellular-and-transdermal-protein-delivery-mediated-by-non-covalent-interactions-with-a-synthetic-guanidine-rich-molecular-carrier
#16
Jungkyun Im, Sanket Das, Dongjun Jeong, Chang-Jin Kim, Hyun-Suk Lim, Ki Hean Kim, Sung-Kee Chung
The impermeability of the cell plasma membrane is one of the major barriers for protein transduction into mammalian cells, and it also limits the use of proteins as therapeutic agents. Protein transduction has usually been achieved based on certain invasive processes or cell penetrating peptides (CPP). Herein we report our study in which a synthetic guanidine-rich molecular carrier is used as a delivery vector for intracellular and transdermal delivery of proteins. First a sorbitol-based molecular carrier having 8 guanidine units (Sor-G8) was synthesized, and then was simply mixed with a cargo protein of varying sizes to form the non-covalent complex of carrier-cargo proteins...
June 17, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28633985/autophagy-a-double-edged-sword-to-fight-plant-viruses
#17
Marion Clavel, Simon Michaeli, Pascal Genschik
In metazoans, autophagy is an essential component of host defense against viruses, orchestrating their degradation. Such antiviral functions for autophagy have also been long suspected in the green lineage. Two recent reports provide molecular insights on how plants selectively send viral proteins and even particles to the vacuole.
June 17, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28633921/applying-the-national-committee-for-quality-assurance-patient-centered-specialty-practice-framework-to-radiology
#18
Allison M Greene, Christopher R Bailey, Mollie Young, Elyce Wolfgang, Aylin Tekes, Thierry A G M Huisman, Daniel J Durand
No abstract text is available yet for this article.
June 17, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28633854/an-investigation-of-lipase-catalysed-sonochemical-synthesis-a-review
#19
REVIEW
Sneha R Bansode, Virendra K Rathod
Ultrasonic irradiation has recently gained attention of researchers for its process intensification in numerous reactions. Earlier ultrasound was known for its application either to deactivate enzyme activity or to disrupt the cell. However, in recent years, practice of ultrasonic irradiation began to emerge as a tool for the activation of the enzymes under mild frequency conditions. The incorporation of ultrasound in any of enzymatic reactions not only increases yield but also accelerates the rate of reaction in the presence of mild conditions with better yield and less side-products...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28633852/lipase-ultrasound-assisted-synthesis-of-polyesters
#20
Prerana D Tomke, Xiaoman Zhao, Pranali P Chiplunkar, Bo Xu, Hongbo Wang, Carla Silva, Virendra K Rathod, Artur Cavaco-Paulo
Poly (ethylene glutarate), poly (ethylene malonate) and poly (ethylene phthalate), were enzymatically synthesized by immobilized Candida antarctica lipase B in solvent free conditions. The synthesis of these polyesters was based on the ester-ester exchange reaction between ethylene glycol diacetate and di-ethyl glutarate, di-benzyl malonate, di-n-octyl phthalate to produce poly (ethylene glutarate), poly (ethylene malonate) and poly (ethylene phthalate), respectively. The effect of ultrasound and PET polymeric beads was evaluated and showed to improve the synthesis of all polyesters...
September 2017: Ultrasonics Sonochemistry
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