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https://www.readbyqxmd.com/read/27914179/ammonothermal-synthesis-of-novel-nitrides-case-study-on-cagasin3
#1
Jonas Häusler, Lukas Neudert, Mathias Mallmann, Robin Niklaus, Anna-Carina L Kimmel, Nicolas S A Alt, Eberhard Schlücker, Oliver Oeckler, Wolfgang Schnick
The first gallium-containing nitridosilicate CaGaSiN3 was synthesized in newly developed high-pressure autoclaves using supercritical ammonia as solvent and nitriding agent. The reaction was conducted in ammonobasic environment starting from intermetallic CaGaSi with NaN3 as mineralizer. At 770 K, intermediate compounds were obtained, which were subsequently converted to the crystalline nitride at temperatures up to 1070 K (70 - 150 MPa). The impact of other mineralizers (e. g. LiN3, KN3 and CsN3) on the product formation was investigated as well...
December 3, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27914060/a-protocol-for-the-design-of-protein-and-peptide-nanostructure-self-assemblies-exploiting-synthetic-amino-acids
#2
Nurit Haspel, Jie Zheng, Carlos Aleman, David Zanuy, Ruth Nussinov
In recent years there has been increasing interest in nanostructure design based on the self-assembly properties of proteins and polymers. Nanodesign requires the ability to predictably manipulate the properties of the self-assembly of autonomous building blocks, which can fold or aggregate into preferred conformational states. The design includes functional synthetic materials and biological macromolecules. Autonomous biological building blocks with available 3D structures provide an extremely rich and useful resource...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27914041/paliperidone-loaded-nanolipomer-system-for-sustained-delivery-and-enhanced-intestinal-permeation-superiority-to-polymeric-and-solid-lipid-nanoparticles
#3
Hala Mahmoud Helal, Sana Mohamed Mortada, Marwa Ahmed Sallam
Paliperidone (PPD) is the most recent second-generation atypical antipsychotic approved for the treatment of schizophrenia. An immediate release dose causes extrapyramidal side effects. In this work, a novel nanolipomer carrier system for PPD with enhanced intestinal permeability and sustained release properties has been developed and optimized. PPD was successfully encapsulated into a lipomer consisting of a specific combination of biocompatible materials including poly-ε-caprolactone as a polymeric core, Lipoid S75, and Gelucire® 50/13 as a lipid shell and polyvinyl alcohol as a stabilizing agent...
December 2, 2016: AAPS PharmSciTech
https://www.readbyqxmd.com/read/27914031/a-simple-spectrofluorimetric-method-for-iron-determination-with-a-chalcone-based-schiff-base
#4
Nurhayat Özbek, Hakan Alp, Gonca Çelik, Tuğba Ak, Osman Can Çağılcı, Nurettin Yaylı, Ümmühan Ocak, Miraç Ocak
A chalcone-based Schiff base (5), capable of detecting iron (III) in partially aqueous media, has been designed, then synthesized by the condensation of 3-formyl-2-hydroxyquinoline and acetophenone. To determine iron (III) ion, a simple spectrofluorimetric method was developed by using the synthesized Schiff base. The developed method was validated by analyzing the certified reference material (CRM-SA-C Sandy Soil C). During the process of the determination of iron in food samples, satisfactory accuracy was obtained for spinach and rocket...
December 2, 2016: Journal of Fluorescence
https://www.readbyqxmd.com/read/27914021/surface-modified-cobalt-ferrite-nanoparticles-for-rapid-capture-detection-and-removal-of-pathogens-a-potential-material-for-water-purification
#5
Raghvendra A Bohara, Nanasaheb D Throat, Nayeem A Mulla, Shivaji H Pawar
Enteric infections resulting from the consumption of contaminated drinking water, inadequate supply of water for personal hygiene, and poor sanitation take a heavy toll worldwide, and developing countries are the major sufferers. Consumption of microbiologically contaminated water leads to diseases such as amoebiasis, cholera, shigellosis, typhoid, and viral infections leading to gastroenteritis and hepatitis B. The present investigation deals with the development of effective method to capture and eliminate microbial contamination of water and improve the quality of water and thus decreasing the contaminated waterborne infections...
December 2, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27914018/encapsulation-of-%C3%AE-sitosterol-in-polyurethane-by-sol-gel-electrospinning
#6
Musarat Amina, Touseef Amna, Nawal Al-Musayeib, Sami A Zabin, M Shamshi Hassan, Myung-Seob Khil
Pristine β-sitosterol or in combination with other phytosterols is utilized in an array of enriched commercial foods. Considering the presence of β-sitosterol in different functional foods and its potential role in prevention and cure of neurodegenerative diseases, the aims of our investigation were to encapsulate β-sitosterol in nanofibers and to estimate influence of β-sitosterol on proliferation of fibroblasts. Electrospun nanofibers have widely been used as scaffolds to mimic natural extracellular matrix...
December 2, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27913907/development-of-a-culturally-informed-child-safety-curriculum-for-american-indian-families
#7
Ryan M Berns, Emily J Tomayko, Kate A Cronin, Ronald J Prince, Tassy Parker, Alexandra K Adams
American Indian (AI) children are disproportionately affected by unintentional injuries, with injury mortality rates approximately 2.3 times higher than the combined rates for all children in the United States. Although multiple risk factors are known to contribute to these increased rates, a comprehensive, culturally informed curriculum that emphasizes child safety is lacking for this population. In response to this need, academic and tribal researchers, tribal community members, tribal wellness staff, and national child safety experts collaborated to develop a novel child safety curriculum...
December 2, 2016: Journal of Primary Prevention
https://www.readbyqxmd.com/read/27913812/association-between-cytokines-and-their-receptor-antagonist-gene-polymorphisms-and-clinical-risk-factors-and-acute-rejection-following-renal-transplantation
#8
SIqing Ding, Jianfei Xie, Qiquan Wan
BACKGROUND Acute rejection (AR) after renal transplantation affects both patient and graft survival. There is growing evidence of the genetic association between cytokine or its receptor antagonist and AR in solid organ transplantation. The objectives of this study were to investigate the role of recipient TNF β, IL-10, IL-1β, and IL-1 receptor antagonist (ra) gene polymorphism, as well as traditional clinical variables such as panel-reactive antibody (PRA) levels, donor type, and HLA mismatches in AR following renal transplantation...
December 3, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27913792/genetic-engineering-approach-to-develop-next-generation-reagents-for-endotoxin-quantification
#9
Hikaru Mizumura, Norihiko Ogura, Jun Aketagawa, Maki Aizawa, Yuki Kobayashi, Shun-Ichiro Kawabata, Toshio Oda
The bacterial endotoxin test, which uses amebocyte lysate reagents of horseshoe crab origin, is a sensitive, reproducible and simple assay to measure endotoxin concentration. To develop sustainable raw materials for lysate reagents that do not require horseshoe crabs, three recombinant protease zymogens (factor C, derived from mammalian cells; factor B; and the proclotting enzyme derived from insect cells) were prepared using a genetic engineering technique. Recombinant cascade reagents (RCRs) were then prepared to reconstruct the reaction cascade in the amebocyte lysate reagent...
December 1, 2016: Innate Immunity
https://www.readbyqxmd.com/read/27913659/formative-research-using-a-community-based-participatory-research-approach-to-develop-an-oral-health-intervention-for-migrant-mexican-families
#10
Tracy L Finlayson, Padideh Asgari, Lisa Hoffman, Ana Palomo-Zerfas, Martha Gonzalez, Nannette Stamm, Maria-Isabel Rocha, Arcela Nunez-Alvarez
Oral health is a leading unmet health need among migrant families. This article describes the 1-year, community-based participatory research (CBPR) approach employed to plan and develop a Líder Communitario (lay community health worker)-led educational intervention for Mexican migrant adult caregivers and their families in three underserved, remote communities in North San Diego County, California. Four partner organizations collaborated, reviewed existing oral health curricula, and sought extensive input on educational topics and research design from key informants, migrant caregivers, and Líderes Communitarios...
December 1, 2016: Health Promotion Practice
https://www.readbyqxmd.com/read/27913653/dimensional-evaluation-of-patient-specific-3d-printing-using-calcium-phosphate-cement-for-craniofacial-bone-reconstruction
#11
Liciane Sabadin Bertol, Rodrigo Schabbach, Luís Alberto Loureiro Dos Santos
The 3D printing process is highlighted nowadays as a possibility to generate individual parts with complex geometries. Moreover, the development of 3D printing hardware, software and parameters permits the manufacture of parts that can be not only used as prototypes, but are also made from materials that are suitable for implantation. In this way, this study investigates the process involved in the production of patient-specific craniofacial implants using calcium phosphate cement, and its dimensional accuracy...
December 1, 2016: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/27913352/towards-zero-waste-furniture-design
#12
Bongjin Koo, Jean Hergel, Sylvain Lefebvre, Niloy Mitra
In traditional design, shapes are first conceived, and then fabricated. While this decoupling simplifies the design process, it can result in unwanted material wastage, especially where off-cut pieces are hard to reuse. In absence of explicit feedback on material usage, the designer remains helpless to effectively adapt the design - even when design variabilities exist.We investigate waste minimizing furniture design wherein based on the current design, the user is presented with design variations that result in less wastage of materials...
December 1, 2016: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/27913334/switchable-and-tunable-baw-duplexer-based-on-ferroelectric-material
#13
Almonir Abdulgader Mansour, Thottam S Kalkur
A switchable and tunable bulk acoustic wave (BAW) duplexer for RF applications is presented in this paper. The fabricated BAW duplexer was built on sapphire substrate using solidly mounted resonators. A metal-organic solution deposition technique was used to form resonators with barium strontium titanate (BST) thin film and six layers of silicon dioxide and tantalum oxide as Bragg reflector. By applying dc bias, the BST thin film shows an electrostrictive effect, and the two filter paths of the BAW duplexer switch to a bandpass response with center frequencies at 4...
December 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27913333/super-cell-piezoelectric-composite-with-1-3-connectivity
#14
Remi Rouffaud, Franck Levassort, Mai Pham Thi, Claire Bantignies, Marc Lethiecq, Anne-Christine Hladky-Hennion
The standard fabrication method for 1-3 piezocomposites for ultrasound transducers is the "dice and fill" method (DFM) in which lateral periodicity is introduced. This contributes to the appearance of spurious modes that can drastically affect the performance of the device if they appear near its thickness mode frequency, thus limiting the effective frequency range. A new 1-3 piezocomposite fabricated with a super-cell structure [1-3 super cell (13SC)] was designed in order to overcome these limitations. It consists of the merging of several periodic cells with 47% PZT volume fraction and epoxy resin as the matrix...
December 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27913332/a-method-for-accurate-modeling-of-baw-filters-at-high-power-levels
#15
Andreas Tag, Vikrant Chauhan, Christian Huck, Bernhard Bader, Dominik Karolewski, F Maximilian Pitschi, Robert Weigel, Amelie Hagelauer
A novel approach for multiphysics modeling of bulk acoustic wave (BAW) filters is presented allowing accurate and at the same time efficient modeling of BAW filters at high power levels. The approach takes the different types of losses and their spatial distribution into account in order to provide the required input for thermal simulation. The temperature distribution determined by thermal simulation is used to modify the geometry and the layer stack of each single resonator of the filter. In this way, the required input for modeling of electromagnetic (EM) and acoustic behavior at high power level is generated...
December 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27913325/increasing-axial-resolution-of-ultrasonic-imaging-with-a-joint-sparse-representation-model
#16
Junbo Duan, Hui Zhong, Bowen Jing, Siyuan Zhang, Mingxi Wan
The axial resolution of ultrasonic imaging is confined by the temporal width of acoustic pulse generated by the transducer, which has a limited bandwidth. Deconvolution can eliminate this effect and, therefore, improve the resolution. However, most ultrasonic imaging methods perform deconvolution scan line by scan line, and therefore the information embedded within the neighbor scan lines is unexplored, especially for those materials with layered structures such as blood vessels. In this paper, a joint sparse representation model is proposed to increase the axial resolution of ultrasonic imaging...
December 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27913297/phospholipase-c%C3%AE-1-suppresses-foreign-body-giant-cell-formation-by-maintaining-runx1-expression-in-macrophages
#17
Ye Seon Kim, Chang Youp Ok, Joon Seong Park, Ha Young Lee, Yoe-Sik Bae
Foreign body giant cell (FBGC) formation is associated with the inflammatory response following material implantation. However, the intracellular signaling events that regulate the process remain unclear. Here, we investigated the potential role of phospholipase C (PLC)γ1, a crucial enzyme required for growth factor-induced signaling, on FBGC formation. Knock-down of PLCγ1 using shRNA induced FBGC formation accompanied by increased expression of cathepsin K, DC-STAMP and CD36. Re-addition of PLCγ1 decreased FBGC formation...
November 29, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27913294/sleep-mediated-memory-consolidation-depends-on-the-level-of-integration-at-encoding
#18
Lea Himmer, Elias Müller, Steffen Gais, Monika Schönauer
There is robust evidence that sleep facilitates declarative memory consolidation. Integration of newly acquired memories into existing neocortical knowledge networks has been proposed to underlie this effect. Here, we test whether sleep affects memory retention for word-picture associations differently when it was learned explicitly or using a fast mapping strategy. Fast mapping is an incidental form of learning that references new information to existing knowledge and possibly allows neocortical integration already during encoding...
November 29, 2016: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/27913289/damage-repair-and-regeneration-in-insect-cuticle-the-story-so-far-and-possibilities-for-the-future
#19
REVIEW
Eoin Parle, Jan-Henning Dirks, David Taylor
The exoskeleton of an insect can contain countless specializations across an individual, across developmental stages, and across the class Insecta. Hence, the exoskeleton's building material cuticle must perform a vast variety of functions. Cuticle displays a wide range of material properties which are determined by several known factors: the amount and orientation of the chitin fibres, the constituents and degree of cross-linking and hydration of the protein matrix, the relative amounts of exo- and endocuticle, and the shape of the structures themselves...
November 29, 2016: Arthropod Structure & Development
https://www.readbyqxmd.com/read/27913270/part-1-comparison-of-plasma-ammonia-results-from-seven-different-automated-platforms-in-use-throughout-central-australia
#20
Corey Markus, Michael Metz
INTRODUCTION: The clinical catchment area for the Metabolic service at the Women's and Children's Hospital in Adelaide, South Australia, covers nearly 2.5millionkm(2). Care of children with metabolic disorders in these remote areas is assisted from Adelaide, and at times, using plasma ammonia results from laboratories up to 3000km away. There are seven different platforms measuring plasma ammonia within this vast clinical catchment area. Hence, a correlation study was conducted to examine the relationship between plasma ammonia results from the seven different platforms in use throughout central Australia...
November 29, 2016: Clinical Biochemistry
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