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https://www.readbyqxmd.com/read/28426039/controlled-synthesis-of-lanthanide-doped-gd2o2s-nanocrystals-with-novel-excitation-dependent-multicolor-emissions
#1
Lei Lei, Shengjun Zhang, Han Xia, Ying Tian, Junjie Zhang, Shiqing Xu
Developing multicolor-emitting materials has significant value in many research fields such as displays, bioimaging, and information storage. The widely adopted strategies to realize multicolor emission are tuning the material composition, phase, and size. Herein, the emission color was continuously controlled from yellow to pink by simply changing the excitation wavelength from 254 nm to 365 nm for Tb(3+)/Eu(3+) co-doped Gd2O2S NCs. The Gd2O2S NCs with different morphologies, including nanoplate with various sizes and flower-like, were successfully prepared by seed-mediated, Na(+)/Y(3+) co-doped, and S concentration-tuned methods...
April 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28424723/evidence-mechanism-and-alternative-chemical-seedbank-level-control-of-glyphosate-resistance-of-a-rigid-ryegrass-lolium-rigidum-biotype-from-southern-spain
#2
Pablo T Fernández-Moreno, Fernando Bastida, Rafael De Prado
Rigid ryegrass (Lolium rigidum) is one of the most troublesome weeds in different crops in the Mediterranean region. A rigid ryegrass biotype from an olive grove in Jaén province (Andalusía, southern Spain), potentially resistant to glyphosate (RG), was tested for its resistance level through dose-response assays using a susceptible biotype (SG). To test the hypothesis of a non-target-site-based resistance, as point mutations are far less common mechanisms of glyphosate resistance, studies were also conducted to elucidate whether resistance was associated with biochemical, metabolism, molecular and/or physiological mechanisms...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28422506/extra-large-pore-mesoporous-silica-nanoparticles-for-directing-in-vivo-m2-macrophage-polarization-by-delivering-il-4
#3
Dohyeong Kwon, Bong Geun Cha, Yuri Cho, Jiyoun Min, Eun-Byeol Park, Suk-Jo Kang, Jaeyun Kim
Over the past decade, mesoporous silica nanoparticles (MSNs) smaller than 200 nm with high colloidal stability have been extensively studied for systemic drug delivery. Although small molecule delivery via MSNs has been successful, the encapsulation of large therapeutic biomolecules, such as proteins or DNA, is limited due to small pore size of the conventional MSNs obtained by soft-templating. Here, we report the synthesis of mesoporous silica nanoparticles with extra-large pores (XL-MSNs) and their application to in vivo cytokine delivery for macrophage polarization...
April 19, 2017: Nano Letters
https://www.readbyqxmd.com/read/28421095/exploiting-wild-relatives-for-genomics-assisted-breeding-of-perennial-crops
#4
REVIEW
Zoë Migicovsky, Sean Myles
Perennial crops are vital contributors to global food production and nutrition. However, the breeding of new perennial crops is an expensive and time-consuming process due to the large size and lengthy juvenile phase of many species. Genomics provides a valuable tool for improving the efficiency of breeding by allowing progeny possessing a trait of interest to be selected at the seed or seedling stage through marker-assisted selection (MAS). The benefits of MAS to a breeder are greatest when the targeted species takes a long time to reach maturity and is expensive to grow and maintain...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28415542/bladder-smooth-muscle-cells-on-electrospun-poly-%C3%AE%C2%B5-caprolactone-poly-l-lactic-acid-scaffold-promote-bladder-regeneration-in-a-canine-model
#5
Nasser Shakhssalim, Masoud Soleimani, Mohammad M Dehghan, Javad Rasouli, Masoud Taghizadeh-Jahed, Peyman M Torbati, Mohammad Naji
Engineering of urinary bladder has been the focus of numerous studies in recent decade. Novel biomaterials, innovative fabrication methods and various modification processes of scaffolds are the critical issues to find supportive matrices. Supportive characteristics of electrospun PCL/PLLA nano-scaffold for bladder augmentation in canine model and the role of bladder cells in regeneration process were appraised. Electrospun PCL/PLLA was fabricated by co-electrospinning of PCL and PLLA. Bladder cells were isolated and transduced with lentiviral particles encoding eGFP and JRed proteins...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415516/acceleration-of-bone-regeneration-in-bioactive-glass-gelatin-composite-scaffolds-seeded-with-bone-marrow-derived-mesenchymal-stem-cells-over-expressing-bone-morphogenetic-protein-7
#6
Saeid Kargozar, Seyed Jafar Hashemian, Mansooreh Soleimani, Peiman Brouki Milan, Mohammad Askari, Vahid Khalaj, Ali Samadikuchaksaraie, Sepideh Hamzehlou, Amir Reza Katebi, Noorahmad Latifi, Masoud Mozafari, Francesco Baino
In this research, the osteoinduction effect of a novel variant of bone morphogenetic protein-7 (BMP-7), delivered through bone marrow mesenchymal stem cells (BM-MSCs) seeded on bioactive glass/gelatin nanocomposite scaffolds, was evaluated in a calvarial critical size defect in rats. After being harvested and characterized in vitro, BM-MSCs were infected by a plasmid vector containing BMP-7 encoding gene enriched with a heparin-binding site (B2BMP-7) to assess its osteogenic effects in vivo. The animals were randomly categorized into three groups receiving the scaffold alone (group I), the scaffold seeded with BM-MSCs (group II), and the scaffold seeded with manipulated BM-MSCs (group III)...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415208/x-ray-shadow-imprint-of-hydrodynamic-instabilities-on-the-surface-of-inertial-confinement-fusion-capsules-by-the-fuel-fill-tube
#7
A G MacPhee, D T Casey, D S Clark, S Felker, J E Field, S W Haan, B A Hammel, J Kroll, O L Landen, D A Martinez, P Michel, J Milovich, A Moore, A Nikroo, N Rice, H F Robey, V A Smalyuk, M Stadermann, C R Weber
Measurements of hydrodynamic instability growth for a high-density carbon ablator for indirectly driven inertial confinement fusion implosions on the National Ignition Facility are reported. We observe significant unexpected features on the capsule surface created by shadows of the capsule fill tube, as illuminated by laser-irradiated x-ray spots on the hohlraum wall. These shadows increase the spatial size and shape of the fill tube perturbation in a way that can significantly degrade performance in layered implosions compared to previous expectations...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28415137/drivers-of-species-role-in-avian-seed-dispersal-mutualistic-networks
#8
Esther Sebastián-González
The mutualistic interaction between frugivore birds and the fruiting plants they disperse presents an asymmetric interaction pattern, with some species having a more important role (i.e. being essential) for maintaining the structure and functioning of the interaction network. The identification of the biological characteristics of these species is of major importance for the understanding and conservation of seed-dispersal interactions. In this study, I use a network approach and avian seed-dispersal networks from 23 different geographical areas to test 5 hypotheses about species characteristics determining the structure of the assemblage...
April 17, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28414678/what-the-eyes-don-t-see-the-heart-does-grieve-over
#9
M Sciaudone, M Dery
INTRODUCTION: A 71 year old Peruvian woman presented with blurry vision and bilateral eye pain and had evidence of bilateral endophthalmitis on eye examination. Her past medical history was notable for multiple abdominal surgeries within the preceding months, including an incarcerated inguinal hernia repair which required an ileostomy placement, and cholecystitis requiring cholecystostomy tube placement. Over her multiple long hospitalizations, she developed bacteremia and fungemia on several occasions, with organisms including Enterobacter cloacae, Klebsiella pneumoniae, Bacteroides fragilis, Pseudomonas aeruginosa, Enterococcus faecium, and Candida albicans...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28412790/-a-preliminary-study-of-three-dimensional-bio-printing-by-polycaprolactone-and-periodontal-ligament-stem-cells
#10
J Xu, M Hu
Objective: To investigate the technical scheme of three-dimensional (3D) bio-printing by polycaprolactone (PCL) and periodontal ligament stem cells (PDLSC). Methods: To manufacture a 3D bio-printing body, PDLSC were used as seed cells, and polycaprolactone (PCL) was used as the 3D printing scaffold material. Print size was designed at 13.0 mm×13.0 mm, and mesh size was 0.25 mm×0.25 mm (group A) and 0.75 mm×0.75 mm (group B). Cell counting kit-8 was used to detect the proliferation of PDLSC on day 1, day 3 and day 5 respectively...
April 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28408376/a-comparative-study-of-tissue-engineered-constructs-from-acropora-and-porites-coral-in-a-large-animal-bone-defect-model
#11
A Decambron, M Manassero, M Bensidhoum, B Lecuelle, D Logeart-Avramoglou, H Petite, V Viateau
OBJECTIVES: To compare the therapeutic potential of tissue-engineered constructs (TECs) combining mesenchymal stem cells (MSCs) and coral granules from either Acropora or Porites to repair large bone defects. MATERIALS AND METHODS: Bone marrow-derived, autologous MSCs were seeded on Acropora or Porites coral granules in a perfusion bioreactor. Acropora-TECs (n = 7), Porites-TECs (n = 6) and bone autografts (n = 2) were then implanted into 25 mm long metatarsal diaphyseal defects in sheep...
April 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28407071/decline-in-rna-integrity-of-dry-stored-soybean-seeds-correlates-with-loss-of-germination-potential
#12
Margaret B Fleming, Christopher M Richards, Christina Walters
This study investigates the relationship between germination ability and damage to RNA in soybean seeds (cv 'Williams 82') stored dry at 5 °C for 1-27 years. Total germination of 14 age cohorts harvested between 2015 and 1989 ranged from 100% to 3%. Germination decline followed classic seed viability kinetics, with symptomatic seed aging beginning after 17 years of storage. RNA integrity was assessed in dry seeds by electrophoresis of total RNA, followed by calculation of the RNA integrity number (RIN, Agilent Bioanalyzer software), which evaluates RNA fragment size distributions...
April 12, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28406901/automatic-extraction-of-endocranial-surfaces-from-ct-images-of-crania
#13
Takashi Michikawa, Hiromasa Suzuki, Masaki Moriguchi, Naomichi Ogihara, Osamu Kondo, Yasushi Kobayashi
The authors present a method for extracting polygon data of endocranial surfaces from CT images of human crania. Based on the fact that the endocast is the largest empty space in the crania, we automate a procedure for endocast extraction by integrating several image processing techniques. Given CT images of human crania, the proposed method extracts endocranial surfaces by the following three steps. The first step is binarization in order to fill void structures, such as diploic space and cracks in the skull...
2017: PloS One
https://www.readbyqxmd.com/read/28405286/predicting-species-establishment-using-absent-species-and-functional-neighborhoods
#14
Jonathan A Bennett, Meelis Pärtel
Species establishment within a community depends on their interactions with the local environment and resident community. Such environmental and biotic filtering is frequently inferred from functional trait and phylogenetic patterns within communities; these patterns may also predict which additional species can establish. However, differentiating between environmental and biotic filtering can be challenging, which may complicate establishment predictions. Creating a habitat-specific species pool by identifying which absent species within the region can establish in the focal habitat allows us to isolate biotic filtering by modeling dissimilarity between the observed and biotically excluded species able to pass environmental filters...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28405282/ecological-application-of-biotic-resistance-to-control-the-invasion-of-an-invasive-plant-ageratina-altissima
#15
Chaeho Byun, Eun Ju Lee
Biotic resistance is the ability of species in a community to limit the invasion of other species. However, biotic resistance is not widely used to control invasive plants. Experimental, functional, and modeling approaches were combined to investigate the processes of invasion by Ageratina altissima (white snakeroot), a model invasive species in South Korea. We hypothesized that (1) functional group identity would be a good predictor of biotic resistance to A. altissima, whereas a species identity effect would be redundant within a functional group, and (2) mixtures of species would be more resistant to invasion than monocultures...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28405027/virus-genomes-reveal-factors-that-spread-and-sustained-the-ebola-epidemic
#16
Gytis Dudas, Luiz Max Carvalho, Trevor Bedford, Andrew J Tatem, Guy Baele, Nuno R Faria, Daniel J Park, Jason T Ladner, Armando Arias, Danny Asogun, Filip Bielejec, Sarah L Caddy, Matthew Cotten, Jonathan D'Ambrozio, Simon Dellicour, Antonino Di Caro, Joseph W Diclaro, Sophie Duraffour, Michael J Elmore, Lawrence S Fakoli, Ousmane Faye, Merle L Gilbert, Sahr M Gevao, Stephen Gire, Adrianne Gladden-Young, Andreas Gnirke, Augustine Goba, Donald S Grant, Bart L Haagmans, Julian A Hiscox, Umaru Jah, Jeffrey R Kugelman, Di Liu, Jia Lu, Christine M Malboeuf, Suzanne Mate, David A Matthews, Christian B Matranga, Luke W Meredith, James Qu, Joshua Quick, Suzan D Pas, My V T Phan, Georgios Pollakis, Chantal B Reusken, Mariano Sanchez-Lockhart, Stephen F Schaffner, John S Schieffelin, Rachel S Sealfon, Etienne Simon-Loriere, Saskia L Smits, Kilian Stoecker, Lucy Thorne, Ekaete Alice Tobin, Mohamed A Vandi, Simon J Watson, Kendra West, Shannon Whitmer, Michael R Wiley, Sarah M Winnicki, Shirlee Wohl, Roman Wölfel, Nathan L Yozwiak, Kristian G Andersen, Sylvia O Blyden, Fatorma Bolay, Miles W Carroll, Bernice Dahn, Boubacar Diallo, Pierre Formenty, Christophe Fraser, George F Gao, Robert F Garry, Ian Goodfellow, Stephan Günther, Christian T Happi, Edward C Holmes, Brima Kargbo, Sakoba Keïta, Paul Kellam, Marion P G Koopmans, Jens H Kuhn, Nicholas J Loman, N'Faly Magassouba, Dhamari Naidoo, Stuart T Nichol, Tolbert Nyenswah, Gustavo Palacios, Oliver G Pybus, Pardis C Sabeti, Amadou Sall, Ute Ströher, Isatta Wurie, Marc A Suchard, Philippe Lemey, Andrew Rambaut
The 2013-2016 West African epidemic caused by the Ebola virus was of unprecedented magnitude, duration and impact. Here we reconstruct the dispersal, proliferation and decline of Ebola virus throughout the region by analysing 1,610 Ebola virus genomes, which represent over 5% of the known cases. We test the association of geography, climate and demography with viral movement among administrative regions, inferring a classic 'gravity' model, with intense dispersal between larger and closer populations. Despite attenuation of international dispersal after border closures, cross-border transmission had already sown the seeds for an international epidemic, rendering these measures ineffective at curbing the epidemic...
April 20, 2017: Nature
https://www.readbyqxmd.com/read/28401593/low-dose-bmp-2-and-msc-dual-delivery-onto-coral-scaffold-for-critical-size-bone-defect-regeneration-in-sheep
#17
Adeline Decambron, Alexandre Fournet, Morad Bensidhoum, Mathieu Manassero, Frédéric Sailhan, Hervé Petite, Delphine Logeart-Avramoglou, Véronique Viateau
Tissue-engineered constructs (TECs) combining resorbable calcium-based scaffolds and mesenchymal stem cells (MSCs) have the capability to regenerate large bone defects. Inconsistent results have, however, been observed, with a lack of osteoinductivity as a possible cause of failure. This study aimed to evaluate the impact of the addition of low-dose bone morphogenetic protein-2 (BMP-2) to MSC-coral-TECs on the healing of clinically-relevant segmental bone defects in sheep. Coral granules were either seeded with autologous MSCs (bone marrow-derived) or loaded with BMP-2...
April 12, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28401020/control-of-tissue-size-and-development-by-a-regulatory-element-in-the-yorkie-3-utr
#18
Takanari Umegawachi, Hideki Yoshida, Hiromu Koshida, Momoko Yamada, Yasuyuki Ohkawa, Tetsuya Sato, Mikita Suyama, Henry M Krause, Masamitsu Yamaguchi
Regulation of the Hippo pathway via phosphorylation of Yorkie (Yki), the Drosophila homolog of human Yes-associated protein 1, is conserved from Drosophila to humans. Overexpression of a non-phosphorylatable form of Yki induces severe overgrowth in adult fly eyes. Here, we show that yki mRNA associates with microsomal fractions and forms foci that partially colocalize to processing bodies in the vicinity of endoplasmic reticulum. This localization is dependent on a stem-loop (SL) structure in the 3' untranslated region of yki...
2017: American Journal of Cancer Research
https://www.readbyqxmd.com/read/28399342/uveal-melanoma-treatment-and-prognostication
#19
Mehmet Dogrusöz, Martine J Jager, Bertil Damato
Approximately 90% of uveal melanoma develop in the choroid, with the remainder arising in the ciliary body or the iris. The treatment of uveal melanoma is aimed at conserving the eye and useful vision, and, if possible, preventing metastatic disease. Enucleation is now reserved for tumors that are large and/or involve the optic disc, having largely been replaced by various forms of radiotherapy (plaque brachy-therapy, proton beam or stereotactic radiotherapy) and laser therapy. Whereas iridectomy and iridocyclectomy are widely performed, transscleral exoresection of choroidal tumors is performed only in a few centers because it requires special skills and hypotensive anesthesia...
March 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28396862/semiquantitative-decision-tools-for-fmd-emergency-vaccination-informed-by-field-observations-and-simulated-outbreak-data
#20
Preben William Willeberg, Mohammad AlKhamis, Anette Boklund, Andres M Perez, Claes Enøe, Tariq Halasa
We present two simple, semiquantitative model-based decision tools, based on the principle of first 14 days incidence (FFI). The aim is to estimate the likelihood and the consequences, respectively, of the ultimate size of an ongoing FMD epidemic. The tools allow risk assessors to communicate timely, objectively, and efficiently to risk managers and less technically inclined stakeholders about the potential of introducing FMD suppressive emergency vaccination. To explore the FFI principle with complementary field data, we analyzed the FMD outbreaks in Argentina in 2001, with the 17 affected provinces as the units of observation...
2017: Frontiers in Veterinary Science
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