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Reticulated Formation

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https://www.readbyqxmd.com/read/27836591/synthesis-of-reticulated-hollow-spheres-structure-nico2s4-and-its-application-in-organophosphate-pesticides-biosensor
#1
Lei Peng, Sheying Dong, Wenbo Wei, Xiaojing Yuan, Tinglin Huang
Electrode materials play a key role in the development of electrochemical sensors, particularly enzyme-based biosensors. Here, a novel NiCo2S4 with reticulated hollow spheres assembled from rod-like structures was prepared by a one-pot solvothermal method and its formation mechanism was discussed. Moreover, comparison of NiCo2S4 materials from different experiment conditions as biosensors was investigated by electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV), and the best one that was reticulated hollow spheres assembled from rod-like structures NiCo2S4 has been successfully employed as a matrix of AChE immobilization for the special structure, superior conductivity and rich reaction active sites...
October 24, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27667810/ultrastructural-morphogenesis-of-a-virus-associated-with-lymphocystis-like-lesions-in-parore-girella-tricuspidata-kyphosidae-perciformes
#2
P M Hine, St J Wakefield, G Mackereth, R Morrison
The morphogenesis of large icosahedral viruses associated with lymphocystis-like lesions in the skin of parore Girella tricuspidata is described. The electron-lucent perinuclear viromatrix comprised putative DNA with open capsids at the periphery, very large arrays of smooth endoplasmic reticulum (sER), much of it with a reticulated appearance (rsER) or occurring as rows of vesicles. Lysosomes, degenerating mitochondria and virions in various stages of assembly, and paracrystalline arrays were also present...
September 26, 2016: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/27594572/tailoring-large-pores-of-porphyrin-networks-on-ag-111-by-metal-organic-coordination
#3
Felix Bischoff, Yuanqin He, Knud Seufert, Daphné Stassen, Davide Bonifazi, Johannes V Barth, Willi Auwärter
The engineering of nanoarchitectures to achieve tailored properties relevant for macroscopic devices is a key motivation of organometallic surface science. To this end, understanding the role of molecular functionalities in structure formation and adatom coordination is of great importance. In this study, the differences in formation of Cu-mediated metal-organic coordination networks based on two pyridyl- and cyano-bearing free-base porphyrins on Ag(111) are elucidated by use of low-temperature scanning tunneling microscopy (STM)...
October 17, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27431794/insight-into-the-ionotropic-gelation-of-chitosan-using-tripolyphosphate-and-pyrophosphate-as-cross-linkers
#4
Pasquale Sacco, Sergio Paoletti, Michela Cok, Fioretta Asaro, Michela Abrami, Mario Grassi, Ivan Donati
Ionotropic gelation of chitosan by means of opposite charge ions represents an efficient alternative to covalent reticulation because of milder condition of use and, in general, higher biocompatibility of the resulting systems. In this work 90° light scattering (turbidimetry), circular dichroism (CD) and (1)H NMR measurements have been performed to study the interactions between the biopolymer and ionic cross-linkers tripolyphosphate (TPP) and pyrophosphate (PPi) in dilute solutions. Thereafter, a dialysis-based technique was exploited to fabricate tridimensional chitosan hydrogels based on both polyanions...
July 15, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27418151/microscopic-and-immunohistochemical-study-on-the-cornification-of-the-developing-beak-in-the-turtle-emydura-macquarii
#5
Lorenzo Alibardi
The development and cornification of the ramphoteca (beak) in turtles are not known. The microscopic aspects of beak formation have been analyzed in the pleurodirian turtle Emydura macquarii using histological, immunocytochemical and ultrastructural methods. At embryonic Stage 15 the maxillar beak is originated from discontinuous placodes (one frontal and two oral) formed in the epidermis above and below the mouth that later merge into the epidermis of the beak. The mandibular beak is formed by two lateral placodes...
October 2016: Journal of Morphology
https://www.readbyqxmd.com/read/27388342/ectopic-expression-of-bnac-cp20-1-results-in-premature-tapetal-programmed-cell-death-in-arabidopsis
#6
Liping Song, Zhengfu Zhou, Shan Tang, Zhiqiang Zhang, Shengqian Xia, Maomao Qin, Bao Li, Jing Wen, Bin Yi, Jinxiong Shen, Chaozhi Ma, Tingdong Fu, Jinxing Tu
Tapetal programmed cell death (PCD) is essential in pollen grain development, and cysteine proteases are ubiquitous enzymes participating in plant PCD. Although the major papain-like cysteine proteases (PLCPs) have been investigated, the exact functions of many PLCPs are still poorly understood in PCD. Here, we identified a PLCP gene, BnaC.CP20.1, which was closely related to XP_013596648.1 from Brassica oleracea. Quantitative real-time PCR analysis revealed that BnaC.CP20.1 expression was down-regulated in male-sterile lines in oilseed rape, suggesting a connection between this gene and male sterility...
September 2016: Plant & Cell Physiology
https://www.readbyqxmd.com/read/27299376/aerosol-assisted-self-assembly-of-reticulated-n-doped-carbonaceous-submicron-spheres-for-effective-removal-of-hexavalent-chromium
#7
Jiawei He, Yuan Long, Yiyan Wang, Chaoliang Wei, Jingjing Zhan
This Research Article described a facile one-step method to prepare reticulated N-doped carbonaceous submicron spheres. Through a simple aerosol-assisted technology, glucosamine sulfate used as a carbon source was aerosolized and carbonized to functionalized carbonaceous submicron spheres. The electrostatic attraction between protonated amino groups and sulfate in the aerosol droplets induced a self-assembly and led to the formation of reticular structure, avoiding the use of templates. Compared to bare carbonaceous materials produced from glucose, reticulated N-doped carbonaceous spheres exhibit higher efficiency in the removal of Cr(VI), where the doping of element nitrogen led to electrostatic attraction between protonated nitrogen and chromium ions, and reticulated structure created relatively higher surface area and pore volume, facilitating materials to contact with Cr(VI) ions...
July 6, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/26931578/linked-in-immunologic-membrane-nanotube-networks
#8
REVIEW
C R Zaccard, C R Rinaldo, R B Mailliard
Membrane nanotubes, also termed tunneling nanotubes, are F-actin-based structures that can form direct cytoplasmic connections and support rapid communication between distant cells. These nanoscale conduits have been observed in diverse cell types, including immune, neuronal, stromal, cancer, and stem cells. Until recently, little was known about the mechanisms involved in membrane nanotube development in myeloid origin APCs or how membrane nanotube networks support their ability to bridge innate and adaptive immunity...
July 2016: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/26847476/hoxa10-null-animals-exhibit-reduced-platelet-biogenesis
#9
Iwona M Konieczna, Teresa A DeLuca, Elizabeth A Eklund, William M Miller
The transcription factor HOXA10 is an important regulator of myelopoiesis. Engineered over-expression of Hoxa10 in mice results in a myeloproliferative disorder that progresses to acute myeloid leukaemia (AML) over time, and in humans over-expression is associated with poor outcomes in AML. Here, we report that loss of Hoxa10 expression in mice results in reduced platelet count and platelet production, but does not affect clotting efficiency. About 40% fewer platelets were found in Hoxa10 null animals in comparison to wild type littermates...
April 2016: British Journal of Haematology
https://www.readbyqxmd.com/read/26843518/tantalum-coating-of-porous-carbon-scaffold-supplemented-with-autologous-bone-marrow-stromal-stem-cells-for-bone-regeneration-in%C3%A2-vitro-and-in%C3%A2-vivo
#10
Xiaowei Wei, Dewei Zhao, Benjie Wang, Wei Wang, Kai Kang, Hui Xie, Baoyi Liu, Xiuzhi Zhang, Jinsong Zhang, Zhenming Yang
Porous tantalum metal with low elastic modulus is similar to cancellous bone. Reticulated vitreous carbon (RVC) can provide three-dimensional pore structure and serves as the ideal scaffold of tantalum coating. In this study, the biocompatibility of domestic porous tantalum was first successfully tested with bone marrow stromal stem cells (BMSCs) in vitro and for bone tissue repair in vivo. We evaluated cytotoxicity of RVC scaffold and tantalum coating using BMSCs. The morphology, adhesion, and proliferation of BMSCs were observed via laser scanning confocal microscope and scanning electron microscopy...
March 2016: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/26810392/bringing-high-rate-co2-based-microbial-electrosynthesis-closer-to-practical-implementation-through-improved-electrode-design-and-operating-conditions
#11
Ludovic Jourdin, Stefano Freguia, Victoria Flexer, Jurg Keller
The enhancement of microbial electrosynthesis (MES) of acetate from CO2 to performance levels that could potentially support practical implementations of the technology must go through the optimization of key design and operating conditions. We report that higher proton availability drastically increases the acetate production rate, with pH 5.2 found to be optimal, which will likely suppress methanogenic activity without inhibitor addition. Applied cathode potential as low as -1.1 V versus SHE still achieved 99% of electron recovery in the form of acetate at a current density of around -200 A m(-2)...
February 16, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/26711890/oxidative-burst-inhibition-cytotoxicity-and-antibacterial-acriquinoline-alkaloids-from-citrus-reticulate-blanco
#12
Marie Fomani, Emmanuel Ngeufa Happi, Achille Nouga Bisoue, Jean Claude Ndom, Alain François Kamdem Waffo, Norbert Sewald, Jean Duplex Wansi
Two novel acridone-quinoline alkaloids, acriquinoline A (1) and acriquinoline B (2), together with twenty-two known compounds were isolated from the methanol extract of the root of Citrus reticulata Blanco. The structures of all compounds were determined by comprehensive analyses of their 1D and 2D NMR and mass spectral (EI and ESI) data. The possible biosynthesis for the formation of above compounds is proposed, based on close examination of their structures. Compounds 1, 2, 6, 10 and 14-17 exhibited strong suppressive effect on phagocytosis response upon activation with serum opsonized zymosan in the range of IC50 0...
January 15, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/26415629/immunolocalization-indicates-that-both-original-and-regenerated-lizard-tail-tissues-contain-populations-of-long-retaining-cells-putative-stem-progenitor-cells
#13
Lorenzo Alibardi
The regeneration of the tail in lizards is likely sustained by stem/progenitor cells located in the stump after amputation of the tail. This microscopic and ultrastructural study shows the localization of 5-bromo-deoxy-uridine (5BrdU)-long retaining labeled cells in different tissues of the tail stump. These putative stem/progenitor cells are sparsely detected in the epidermis of scales, adipose tissue, intermuscle connective septa, myosatellite cells, and perichondrion of the vertebrae. Most of 5BrdU-labeled cells are present in the bone marrow of vertebrae as hemocytoblasts and reticulate cells, whereas more numerous myelocytes and polychromatophilic erythroblasts show a variable level of nuclear labeling...
November 2015: Microscopy Research and Technique
https://www.readbyqxmd.com/read/26369194/fabrication-and-microstructure-of-hydroxyapatite-coatings-on-zirconia-by-room-temperature-spray-process
#14
Dong Seok Seo, Hak Cheol Chae, Jong Kook Lee
Hydroxyapatite coatings were fabricated on zirconia substrates by a room temperature spray process and were investigated with regards to their microstructure, composition and dissolution in water. An initial hydroxyapatite powder was prepared by heat treatment of bovine-bone derived powder at 1100 °C for 2 h, while dense zirconia substrates were fabricated by pressing 3Y-TZP powder and sintering it at 1350 °C for 2 h. Room temperature spray coating was performed using a slit nozzle in a low pressure-chamber with a controlled coating time...
August 2015: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/26330186/micro-concentration-lipopolysaccharide-as-a-novel-stimulator-of-megakaryocytopoiesis-that-synergizes-with-il-6-for-platelet-production
#15
Di Wu, Jun Xie, Xuejun Wang, Bingcheng Zou, Yin Yu, Tao Jing, Songmei Zhang, Qing Zhang
Lipopolysaccharide (LPS) induces platelet activation and enhances platelet sensitivity to aggregation, which might alter platelet counts. We found that serial doses of micro-concentration LPS significantly increased the platelet count in mice treated with kanamycin, along with increased expression of IL-6 compared with IL-3 and TPO in megakaryocytes obtained from the mouse bone morrow following LPS administration. Furthermore, LPS at lower levels ranging plus IL-6 effectively stimulated CFU-MK formation and increased CD41 expression and megakaryocyte polyploidization...
2015: Scientific Reports
https://www.readbyqxmd.com/read/26272103/abnormal-megakaryopoiesis-and-platelet-function-in-cyclooxygenase-2-deficient-mice
#16
Silvia S Barbieri, Giovanna Petrucci, Eva Tarantino, Patrizia Amadio, Bianca Rocca, Maurizio Pesce, Kellie R Machlus, Franco O Ranelletti, Sara Gianellini, Babette Weksler, Joseph E Italiano, Elena Tremoli
Previous studies suggest that cyclooxygenase-2 (COX-2) might influence megakaryocyte (MK) maturation and platelet production in vitro. Using a gene deletion model, we analysed the effect of COX-2 deficiency on megakaryopoiesis and platelet function. COX-2-/- mice (10-12 weeks old) have hyper-responsive platelets as suggested by their enhanced aggregation, TXA2 biosynthesis, CD62P and CD41/CD61 expression, platelet-fibrinogen binding, and increased thromboembolic death after collagen/epinephrine injection compared to wild-type (WT)...
November 25, 2015: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/26235316/chlamydia-infected-cells-shed-gp96-to-prevent-chlamydial-re-infection
#17
Karthika Karunakaran, Prema Subbarayal, Nadine Vollmuth, Thomas Rudel
Chlamydia trachomatis is an obligate intracellular human pathogen with a biphasic developmental life cycle. The infectious elementary bodies (EBs) enter a host cell where they transform into reticulate bodies (RBs) that use cellular metabolites to multiply. Re-infection of an infected cell during the replicative phase of chlamydial development may prevent formation of infectious EBs, interrupting the infectious cycle. Here, we report that Glucose Regulated Protein 96 (Gp96), a chaperone for cell surface receptors, binds to and facilitates adherence and entry of C...
November 2015: Molecular Microbiology
https://www.readbyqxmd.com/read/26182838/the-chloroplast-genome-of-the-hexaploid-spartina-maritima-poaceae-chloridoideae-comparative-analyses-and-molecular-dating
#18
COMPARATIVE STUDY
M Rousseau-Gueutin, S Bellot, G E Martin, J Boutte, H Chelaifa, O Lima, S Michon-Coudouel, D Naquin, A Salmon, K Ainouche, M Ainouche
The history of many plant lineages is complicated by reticulate evolution with cases of hybridization often followed by genome duplication (allopolyploidy). In such a context, the inference of phylogenetic relationships and biogeographic scenarios based on molecular data is easier using haploid markers like chloroplast genome sequences. Hybridization and polyploidization occurred recurrently in the genus Spartina (Poaceae, Chloridoideae), as illustrated by the recent formation of the invasive allododecaploid S...
December 2015: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/26156663/on-surface-synthesis-of-carbon-based-scaffolds-and-nanomaterials-using-terminal-alkynes
#19
Florian Klappenberger, Yi-Qi Zhang, Jonas Björk, Svetlana Klyatskaya, Mario Ruben, Johannes V Barth
The covalent linking of acetylene compounds is an important synthetic tool to control carbon-carbon bond formation and has been extensively studied for more than a century. Notably, Glaser coupling and subsequently developed refined procedures present an important route for the fabrication of distinct carbon-based scaffolds incorporating units with both sp(2)- and sp-hybridizations, such as carbyne chains, or two-dimensional (2D) graphyne or graphdiyne networks. However, the realization of the envisioned regular low-dimensional compounds and nanoarchitectures poses formidable challenges when following conventional synthesis protocols in solution, which we briefly overview...
July 21, 2015: Accounts of Chemical Research
https://www.readbyqxmd.com/read/26135829/using-negative-pressure-therapy-for-wound-healing-in-the-extremely-low-birth-weight-infant-micropreemie
#20
Barbara McGarrah
BACKGROUND: The term micropreemie describes an infant born weighing less than 1 pound 12 ounces (800 g) or before 26 weeks' gestation. The gastrointestinal tract of these premature infants is fragile due to developmental immaturity. In this case study, we describe our experience with wound care following surgical intervention for necrotizing enterocolitis in a micropreemie. CASE: Baby A is a female who was born at 23 weeks 5 days; she weighed 530 g. On day 12 of life, a sonogram was interpreted as suspicious for intestinal perforation...
July 2015: Journal of Wound, Ostomy, and Continence Nursing
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