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Reticulated Formation

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https://www.readbyqxmd.com/read/29846951/examination-of-prezygotic-and-postzygotic-isolating-barriers-in-tropical-ulva-ulvophyceae-chlorophyta-evidence-for-ongoing-speciation
#1
Alvin P Monotilla, Tomohiro Nishimura, Masao Adachi, Yuta Tanii, Danilo B Largo, Masanori Hiraoka
Phylogenetic clades based on DNA sequences such as the chloroplast rbcL gene and the nuclear ITS region are frequently used to delimit algal species. However, these molecular markers cannot accurately delimit boundaries among some Ulva species. Although Ulva reticulata and U. ohnoi occasionally bloom in tropical to warm-temperate regions and are clearly distinguishable by their reticulate or plain blade morphology, they have few or no sequence divergences in these molecular markers and form a monophyletic clade...
May 30, 2018: Journal of Phycology
https://www.readbyqxmd.com/read/29804810/supergene-evolution-triggered-by-the-introgression-of-a-chromosomal-inversion
#2
Paul Jay, Annabel Whibley, Lise Frézal, María Ángeles Rodríguez de Cara, Reuben W Nowell, James Mallet, Kanchon K Dasmahapatra, Mathieu Joron
Supergenes are groups of tightly linked loci whose variation is inherited as a single Mendelian locus and are a common genetic architecture for complex traits under balancing selection [1-8]. Supergene alleles are long-range haplotypes with numerous mutations underlying distinct adaptive strategies, often maintained in linkage disequilibrium through the suppression of recombination by chromosomal rearrangements [1, 5, 7-9]. However, the mechanism governing the formation of supergenes is not well understood and poses the paradox of establishing divergent functional haplotypes in the face of recombination...
May 16, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29735758/the-impact-of-active-metabolism-on-chlamydia-trachomatis-elementary-body-transcript-profile-and-infectivity
#3
Scott Grieshaber, Nicole Grieshaber, Hong Yang, Briana Baxter, Ted Hackstadt, Anders Omsland
Bacteria of the genus Chlamydia include the significant human pathogens C. trachomatis and C. pneumoniae All Chlamydiae are obligate intracellular parasites that depend on infection of a host cell and transition through a biphasic developmental cycle. Following host cell invasion by the infectious Elementary Body (EB), the pathogen transitions to the replicative but non-infectious Reticulate Body (RB). Differentiation of the RB back to the EB is essential to generate infectious progeny. While the EB form has historically been regarded as metabolically inert, maintenance of infectivity during incubation with specific nutrients has revealed active maintenance of the infectious phenotype...
May 7, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29723142/use-of-a-novel-foam-dressing-with-negative-pressure-wound-therapy-and-instillation-recommendations-and-clinical-experience
#4
Paul J Kim, Andrew Applewhite, Anthony N Dardano, Luis Fernandez, Kimberly Hall, Elizabeth McElroy, Susan Mendez-Eastman, Marie Anne Obst, Casey Thomas, Lindsey Waddell, Garrett Wirth, Luc Téot
A new reticulated open-cell foam dressing with through holes (ROCF-CC) has been introduced to assist with wound cleansing by removing thick wound exudate and infectious materials during neg- ative pressure wound therapy with instillation. Due to the limited published evidence supporting use of ROCF-CC dressings with negative pressure wound therapy with instillation and dwell time (NPWTi-d), clinicians have been relying on practical application experience to gain pro ciency with the dressing and NPWTi-d. To help provide general guidelines for safe and e cient use of ROCF-CC dressings with NPWTi-d, a multidisciplinary expert panel of clinicians was convened from September 28 to 29, 2017...
March 2018: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/29715461/direct-visualization-of-the-wntless-induced-redistribution-of-wnt1-in-developing-chick-embryos
#5
Lisa M Galli, Frederick Santana, Chantilly Apollon, Linda A Szabo, Keri Ngo, Laura W Burrus
Paracrine Wnt signals are critical regulators of cell proliferation, specification, and differentiation during embryogenesis. Consistent with the discovery that Wnt ligands are post-translationally modified with palmitoleate (a 16 carbon mono-unsaturated fatty acid), our studies show that the vast majority of bioavailable chick WNT1 (cWNT1) produced in stably transfected L cells is cell-associated. Thus, it seems unlikely that the WNT1 signal is propagated by diffusion alone. Unfortunately, the production and transport of vertebrate Wnt proteins has been exceedingly difficult to study as few antibodies are able to detect endogenous Wnt proteins and fixation is known to disrupt the architecture of cells and tissues...
April 28, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29683488/new-prospects-in-the-detection-and-comparative-analysis-of-hybridization-in-the-tree-of-life
#6
Ryan A Folk, Pamela S Soltis, Douglas E Soltis, Robert Guralnick
Assessing the relative importance of the various pathways to diversification is a central goal of biodiversity researchers. For plant biologists, and increasingly across the spectrum of biological sciences, among these pathways of interest is hybridization. New methodological developments are moving the field away from questions of whether natural hybridization occurs or hybrids can persist and toward more direct assessments of the long-term impact of hybridization on diversification and genome organization...
March 2018: American Journal of Botany
https://www.readbyqxmd.com/read/29677445/new-amphiphilic-composite-for-preparing-efficient-coated-potassium-fertilizers-for-top-dressing-fertilization-of-annual-crops
#7
Oscar Urrutia, Javier Erro, Andre Zabini, Kent Hoshiba, Anne F Blandin, Roberto Baigorri, Manuel Martín-Pastor, Yves Alis, Jean C Yvin, José M García-Mina
This study describes the efficiency of a new coating material for preparing granulated potassium-fertilizers with a potassium release to the soil solution sensitive to rainfall intensity. The composite is prepared by reaction of an alkyd-resin with cement in the absence of water. The complementary use of diverse analytical techniques showed that the presence of the cement fraction induced alkyd resin reticulation and gradual cement-resin hardening. Scanning electron microscopy revealed the formation of micro and nanopores within cement-clusters, whose water permeability is affected by the resin reticulation and amphiphilic character...
May 16, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29666579/d-dencichine-regulates-thrombopoiesis-by-promoting-megakaryocyte-adhesion-migration-and-proplatelet-formation
#8
Shilan Ding, Min Wang, Song Fang, Huibo Xu, Huiting Fan, Yu Tian, Yadong Zhai, Shan Lu, Xin Qi, Fei Wei, Guibo Sun, Xiaobo Sun
Life-threatening chemotherapy-induced thrombocytopenia can increase the risk of bleeding due to a dramatic low platelet count, which may limit or delay treatment schedules in cancer patients. The pressing need for the rapid alleviation of the symptoms of thrombocytopenia has prompted us to search for novel highly effective and safe thrombopoietic agents. Pharmacological investigations have indicated that dencichine can prevent and treat blood loss and increase the number of platelets. On the basis of the neurotoxicity of dencichine, D-dencichine is artificially synthesized in the laboratory...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29617560/3d-anionic-silicate-covalent-organic-framework-with-srs-topology
#9
Oussama Yahiaoui, Andrew N Fitch, Frank Hoffmann, Michael Fröba, Arne Thomas, Jérôme Roeser
The synthesis of 3D covalent organic frameworks (COFs) adopting novel topologies is challenging, and so far 3D COFs have only been reported for nets based on building blocks with tetrahedral geometry. We demonstrate the targeted synthesis of an anionic 3D COF crystallizing in a three-coordinated srs net by exploiting a recently developed linkage for the formation of anionic silicate COFs based on hypercoordinate silicon nodes. The framework, named SiCOF-5, was synthesized by reticulating dianionic hexacoordinate [SiO6 ]2- nodes with triangular triphenylene building blocks and adopts a two-fold interpenetrated srs-c net with an overall composition of Na2 [Si(C18 H6 O6 )] (where C18 H6 O6 is triphenylene-2,3,6,7,10,11-hexakis(olate))...
April 25, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29584421/benzoxazole-linked-ultrastable-covalent-organic-frameworks-for-photocatalysis
#10
Pi-Feng Wei, Ming-Zhu Qi, Zhi-Peng Wang, San-Yuan Ding, Wei Yu, Qiang Liu, Li-Ke Wang, Huai-Zhen Wang, Wan-Kai An, Wei Wang
The structural uniqueness of covalent organic frameworks (COFs) has brought these new materials great potential for advanced applications. One of the key aspects yet to be developed is how to improve the robustness of covalently linked reticular frameworks. In order to make the best use of π-conjugated structures, we develop herein a "killing two birds with one stone" strategy and construct a series of ultrastable benzoxazole-based COFs (denoted as LZU-190, LZU-191, and LZU-192) as metal-free photocatalysts...
April 4, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29562303/dating-the-species-network-allopolyploidy-and-repetitive-dna-evolution-in-american-daisies-melampodium-sect-melampodium-asteraceae
#11
Jamie McCann, Tae-Soo Jang, Jiri Macas, Gerald M Schneeweiss, Nicholas J Matzke, Petr Novák, Tod F Stuessy, José L Villaseñor, Hanna Weiss-Schneeweiss
Allopolyploidy has played an important role in the evolution of the flowering plants. Genome mergers are often accompanied by significant and rapid alterations of genome size and structure via chromosomal rearrangements and altered dynamics of tandem and dispersed repetitive DNA families. Recent developments in sequencing technologies and bioinformatic methods allow for a comprehensive investigation of the repetitive component of plant genomes. Interpretation of evolutionary dynamics following allopolyploidization requires both the knowledge of parentage and the age of origin of an allopolyploid...
March 19, 2018: Systematic Biology
https://www.readbyqxmd.com/read/29530649/metaplastic-woven-bone-in-bone-metastases-a-fourier-transform-infrared-analysis-and-imaging-of-bone-quality-ftir
#12
D Chappard, G Mabilleau, C Masson, A Tahla, E Legrand
Most osteolytic tumors are in fact mixed and contain an osteoblastic component associated with the predominant osteolytic areas. This metaplastic woven bone is always evidenced by histological analysis even in the absence of radiological expression. Metaplastic bone formation reflects the activation of new osteoblasts coming from the stimulation of the dormant lining cells. Twelve patients with secondary metastases of the iliac crest evidenced by hot spots on a 99 Tc-MBP san were diagnosed by histomorphometry on bone biopsies...
March 9, 2018: Morphologie: Bulletin de L'Association des Anatomistes
https://www.readbyqxmd.com/read/29514307/inferring-phylogenetic-networks-using-phylonet
#13
Dingqiao Wen, Yun Yu, Jiafan Zhu, Luay Nakhleh
PhyloNet was released in 2008 as a software package for representing and analyzing phylogenetic networks. At the time of its release, the main functionalities in PhyloNet consisted of measures for comparing network topologies and a single heuristic for reconciling gene trees with a species tree. Since then, PhyloNet has grown significantly. The software package now includes a wide array of methods for inferring phylogenetic networks from data sets of unlinked loci while accounting for both reticulation (e.g...
March 5, 2018: Systematic Biology
https://www.readbyqxmd.com/read/29384268/dating-phototrophic-microbial-lineages-with-reticulate-gene-histories
#14
C Magnabosco, K R Moore, J M Wolfe, G P Fournier
Phototrophic bacteria are among the most biogeochemically significant organisms on Earth and are physiologically related through the use of reaction centers to collect photons for energy metabolism. However, the major phototrophic lineages are not closely related to one another in bacterial phylogeny, and the origins of their respective photosynthetic machinery remain obscured by time and low sequence similarity. To better understand the co-evolution of Cyanobacteria and other ancient anoxygenic phototrophic lineages with respect to geologic time, we designed and implemented a variety of molecular clocks that use horizontal gene transfer (HGT) as additional, relative constraints...
March 2018: Geobiology
https://www.readbyqxmd.com/read/29377394/platelet-predominate-gene-expression-and-reticulated-platelets-in-nonvalvular-atrial-fibrillation-effect-of-pulmonary-veins-isolation
#15
Waldemar E Wysokinski, Alfonso Tafur, Yanhong Wu, Naser Ammash, Samuel J Asirvatham, Izabela Gosk-Bierska, Diane E Grill, Joshua P Slusser, Jozef Mruk, Robert D McBane
INTRODUCTION: Reticulated platelet (RP) content is increased in nonvalvular atrial fibrillation (NVAF). The purpose of this study was to determine if platelet content, morphology, and RP proportion are modulated by platelet genes. METHODS AND RESULTS: Expression of six platelet-predominate genes impacting platelet formation and release, platelet count, and RP content was assessed in NVAF patients before and 3-4 months after pulmonary veins isolation (PVI) and compared to normal sinus rhythm (NSR) controls...
March 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29259611/a-structurally-specialized-uniform-wall-layer-is-essential-for-constructing-wall-ingrowth-papillae-in-transfer-cells
#16
Xue Xia, Hui-Ming Zhang, Christina E Offler, John W Patrick
Transfer cells are characterized by wall labyrinths with either a flange or reticulate architecture. A literature survey established that reticulate wall ingrowth papillae ubiquitously arise from a modified component of their wall labyrinth, termed the uniform wall layer; a structure absent from flange transfer cells. This finding sparked an investigation of the deposition characteristics and role of the uniform wall layer using a Vicia faba cotyledon culture system. On transfer of cotyledons to culture, their adaxial epidermal cells spontaneously trans -differentiate to a reticulate architecture comparable to their abaxial epidermal transfer cell counterparts formed in planta ...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29194636/benthic-flattened-cells-of-the-phylogenetically-related-marine-dinoflagellates-protoceratium-reticulatum-and-ceratocorys-mariaovidiorum-gonyaulacales-a-new-type-of-cyst
#17
Pablo Salgado, Santiago Fraga, Francisco Rodríguez, Isabel Bravo
A planktonic-benthic relationship has been described for many dinoflagellate species as part of their ecological strategy to overcome highly variable aquatic environments. Here, the phylogenetically and morphologically related marine dinoflagellates Protoceratium reticulatum and Ceratocorys mariaovidiorum were studied in relation to an unknown benthic life form. In vivo and fixed samples from cultures were analyzed in detail by light and scanning electron microscopy. In both species, a cell type with a morphology different from that of vegetative cells was observed in cultures grown until stationary phase...
February 2018: Journal of Phycology
https://www.readbyqxmd.com/read/28864250/a-straightforward-approach-to-enhance-the-textural-mechanical-and-biological-properties-of-injectable-calcium-phosphate-apatitic-cements-cpcs-cpc-blood-composites-a-comprehensive-study
#18
Charlotte Mellier, François-Xavier Lefèvre, Franck Fayon, Valérie Montouillout, Christelle Despas, Myriam Le Ferrec, Florian Boukhechba, Alain Walcarius, Pascal Janvier, Maeva Dutilleul, Olivier Gauthier, Jean-Michel Bouler, Bruno Bujoli
Two commercial formulations of apatitic calcium phosphate cements (CPCs), Graftys® Quickset (QS) and Graftys® HBS (HBS), similar in composition but with different initial setting time (7 and 15min, respectively), were combined to ovine whole blood. Surprisingly, although a very cohesive paste was obtained after a few minutes, the setting time of the HBS/blood composite dramatically delayed when compared to its QS analogue and the two blood-free references. Using solid state NMR, scanning electron microscopy and high frequency impedance measurements, it was shown that, in the particular case of the HBS/blood composite, formation of a reticulated and porous organic network occurred in the intergranular space, prior to the precipitation of apatite crystals driven by the cement setting process...
August 30, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28835360/chlamydia-trachomatis-the-persistent-pathogen
#19
REVIEW
Steven S Witkin, Evelyn Minis, Aikaterini Athanasiou, Julie Leizer, Iara M Linhares
Chlamydia trachomatis is an obligate intracellular bacterium whose only natural host is humans. Although presenting as asymptomatic in most women, genital tract chlamydial infections are a leading cause of pelvic inflammatory disease, tubal factor infertility, and ectopic pregnancy. C. trachomatis has evolved successful mechanisms to avoid destruction by autophagy and the host immune system and persist within host epithelial cells. The intracellular form of this organism, the reticulate body, can enter into a persistent nonreplicative but viable state under unfavorable conditions...
October 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28813684/mimicking-mechanical-response-of-natural-tissues-strain-hardening-induced-by-transient-reticulation-in-lactose-modified-chitosan-chitlac
#20
Michela Cok, Pasquale Sacco, Davide Porrelli, Andrea Travan, Massimiliano Borgogna, Eleonora Marsich, Sergio Paoletti, Ivan Donati
The effect of transient cross-links has been explored on a lactose-modified chitosan, which previously had shown interesting biological features. The presence of galactose side chains and of the polyol spacer resulted particularly appealing for the reticulation by borate ions. The interaction between chitlac and borax was investigated by means of11 B NMR while rheology pointed to a marked non-linear behavior depending on the amount of borax added to the system. The presence of limited amount of cross-linking ion led to dilatant behavior when the steady flow curve was measured...
January 2018: International Journal of Biological Macromolecules
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