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https://www.readbyqxmd.com/read/28938205/co-exposure-to-methylmercury-and-inorganic-arsenic-in-baby-rice-cereals-and-rice-containing-teething-biscuits
#1
Sarah E Rothenberg, Brian P Jackson, G Carly McCalla, Alexis Donohue, Alison M Emmons
BACKGROUND: Rice is an important dietary source for methylmercury (MeHg), a potent neurotoxin, and inorganic arsenic (As), a human carcinogen. Rice baby cereals are a dietary source of inorganic As; however, less is known concerning MeHg concentrations in rice baby cereals and rice teething biscuits. METHODS: MeHg concentrations were measured in 36 rice baby cereals, eight rice teething biscuits, and four baby cereals manufactured with oats/wheat (n = 48 total)...
September 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28937732/reducing-agent-assisted-excessive-galvanic-replacement-mediated-seed-mediated-synthesis-of-porous-gold-nanoplates-and-highly-efficient-gene-thermo-cancer-therapy
#2
Seounghun Kang, Kyunglee Kang, Hyun Huh, Hyungjun Kim, Sung-Jin Chang, Tae Jung Park, Ki Soo Chang, Dal-Hee Min, Hongje Jang
Porous Au nanoplates (pAuNPs) were manufactured by a reducing agent-assisted galvanic replacement reaction on Ag nanoplates using a seed-mediated synthetic approach. Two core additives, polyvinylpyrrolidone and L-ascorbic acid, prevented fragmentation and proceeded secondary growth. By controlling the concentration of the additives and the amount of replacing ion AuCl4-, various nanostructures including nanoplates with holes, nanoframes, porous nanoplates, and bumpy nanoparticles with unity and homogeneity were synthesized...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28937645/bioelectrochemical-detection-of-mycobacterium-tuberculosis-esat-6-in-an-antibody-based-biomicrosystem
#3
Danna Sepulveda, Miguel A Aroca, Andres Varela, Patricia Del Portillo, Johann F Osma
Bioelectrochemical sensing of Mycobacterium tuberculosis through electro-immunosensors is a promising technique to detect relevant analytes. In general, immunosensors require the formation of organic assemblies by the adsorption of molecular constituents. Moreover, they depend on the correct immobilization of the bio-recognition element in the biosensor. These procedures cannot be easily monitored without the use of invasive methods. In this work, an impedance analysis technique was used, as a non-invasive method, to measure and differentiate the manufacturing stages of the sensors...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28937643/design-and-additive-manufacturing-of-3d-phononic-band-gap-structures-based-on-gradient-based-optimization
#4
Maximilian Wormser, Fabian Wein, Michael Stingl, Carolin Körner
We present a novel approach for gradient based maximization of phononic band gaps. The approach is a geometry projection method combining parametric shape optimization with density based topology optimization. By this approach, we obtain, in a two dimension setting, cellular structures exhibiting relative and normalized band gaps of more than 8 and 1.6, respectively. The controlling parameter is the minimal strut size, which also corresponds with the obtained stiffness of the structure. The resulting design principle is manually interpreted into a three dimensional structure from which cellular metal samples are fabricated by selective electron beam melting...
September 22, 2017: Materials
https://www.readbyqxmd.com/read/28937638/effects-of-processing-parameters-on-surface-roughness-of-additive-manufactured-ti-6al-4v-via-electron-beam-melting
#5
Pan Wang, Wai Jack Sin, Mui Ling Sharon Nai, Jun Wei
As one of the powder bed fusion additive manufacturing technologies, electron beam melting (EBM) is gaining more and more attention due to its near-net-shape production capacity with low residual stress and good mechanical properties. These characteristics also allow EBM built parts to be used as produced without post-processing. However, the as-built rough surface introduces a detrimental influence on the mechanical properties of metallic alloys. Thereafter, understanding the effects of processing parameters on the part's surface roughness, in turn, becomes critical...
September 22, 2017: Materials
https://www.readbyqxmd.com/read/28937633/predictive-simulation-of-process-windows-for-powder-bed-fusion-additive-manufacturing-influence-of-the-powder-bulk-density
#6
Alexander M Rausch, Vera E Küng, Christoph Pobel, Matthias Markl, Carolin Körner
The resulting properties of parts fabricated by powder bed fusion additive manufacturing processes are determined by their porosity, local composition, and microstructure. The objective of this work is to examine the influence of the stochastic powder bed on the process window for dense parts by means of numerical simulation. The investigations demonstrate the unique capability of simulating macroscopic domains in the range of millimeters with a mesoscopic approach, which resolves the powder bed and the hydrodynamics of the melt pool...
September 22, 2017: Materials
https://www.readbyqxmd.com/read/28936988/reducing-radiation-exposure-with-iterative-reconstruction-an-inter-and-intra-scanner-analysis
#7
Aaron Rohr, Jo Wick, Jacqueline Hill, Carissa Walter, Neville Irani, Shaun Best, Kirk Miller, Ryan Ash
Our purpose in this study was to compare delivered radiation exposure via Computed Tomography Dose Index Volume (CTDIvol) and Dose Length Production (DLP) measurements from computed tomography (CT) examinations performed on scanners with and without image-quality enhancing iterative reconstruction (IR) software. A retrospective analysis was conducted on randomly selected chest, abdomen, and/or pelvis CT examinations from three different scanners from January 1, 2013 to December 31, 2013. CTDIvol and DLP measurements were obtained from two CT scanners with and one CT scanner without IR software...
September 22, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28936896/fat-fraction-mapping-using-magnetic-resonance-imaging-insight-into-pathophysiology
#8
Timothy J P Bray, Manil D Chouhan, Shonit Punwani, Alan Bainbridge, Margaret A Hall-Craggs
Adipose cells have traditionally been viewed as a simple, passive energy storage depot for triglycerides. However, in recent years it has become clear that adipose cells are highly physiologically active and have a multitude of endocrine, metabolic, haematological and immune functions. Changes in the number or size of adipose cells may be directly implicated in disease (for example, in the metabolic syndrome), but may also be linked to other pathological processes such as inflammation, malignant infiltration or infarction...
September 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28936855/-investigation-on-supramolecular-mechanism-of-multi-component-overall-control-in-chinese-medicine-controlled-sustained-release-preparation
#9
Yan-Tao Yang, Ye-Qin Tao, Wen-Han Tang, Sen Li, Ji-Lian Shi, Yi-Qun Zhou, Wen-Long Liu, Fu-Yuan He
Controlled sustained-release preparation (CSRP) is a definitely important source of innovative medicines, however, its further researches and development are limited due to the complexity of Chinese medicine (CM) compositions, and a series of unclear key problems like the apparent properties from physical and chemical aspects. Combined with the CM characteristics of the multiple components and synergistic effect, a series of bottleneck problems in the preparation of CSRP were analyzed. Then the mechanism and influences of supermolecular chemical theory in the CSRP about the multiple-components overall-control were explored under the guideline of "overall control, synchronous dissolution" in CSRP, based on the previous explications about supramolecular chemistry theories and with the application of single component precision controlling technologies...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28936421/a-conceptual-framework-to-assess-effectiveness-in-wheelchair-provision
#10
Deepan C Kamaraj, Nathan Bray, Karen Rispin, Padmaja Kankipati, Jonathan Pearlman, Johan Borg
BACKGROUND: Currently, inadequate wheelchair provision has forced many people with disabilities to be trapped in a cycle of poverty and deprivation, limiting their ability to access education, work and social facilities. This issue is in part because of the lack of collaboration among various stakeholders who need to work together to design, manufacture and deliver such assistive mobility devices. This in turn has led to inadequate evidence about intervention effectiveness, disability prevalence and subsequent costeffectiveness that would help facilitate appropriate provision and support for people with disabilities...
2017: Afr J Disabil
https://www.readbyqxmd.com/read/28936416/effect-of-wheelchair-design-on-wheeled-mobility-and-propulsion-efficiency-in-less-resourced-settings
#11
Christopher J Stanfill, Jody L Jensen
BACKGROUND: Wheelchair research includes both qualitative and quantitative approaches, primarily focuses on functionality and skill performance and is often limited to short testing periods. This is the first study to use the combination of a performance test (i.e. wheelchair propulsion test) and a multiple-day mobility assessment to evaluate wheelchair designs in rural areas of a developing country. OBJECTIVES: Test the feasibility of using wheel-mounted accelerometers to document bouts of wheeled mobility data in rural settings and use these data to compare how patients respond to different wheelchair designs...
2017: Afr J Disabil
https://www.readbyqxmd.com/read/28936413/discriminatory-validity-of-the-aspects-of-wheelchair-mobility-test-as-demonstrated-by-a-comparison-of-four-wheelchair-types-designed-for-use-in-low-resource-areas
#12
Karen L Rispin, Elisa Hamm, Joy Wee
BACKGROUND: Comparative effectiveness research on wheelchairs available in low-resource areas is needed to enable effective use of limited funds. Mobility on commonly encountered rolling environments is a key aspect of function. High variation in capacity among wheelchair users can mask changes in mobility because of wheelchair design. A repeated measures protocol in which the participants use one type of wheelchair and then another minimises the impact of individual variation. OBJECTIVES: The Aspects of Wheelchair Mobility Test (AWMT) was designed to be used in repeated measures studies in low-resource areas...
2017: Afr J Disabil
https://www.readbyqxmd.com/read/28936358/characteristics-of-occupational-musculoskeletal-disorders-of-five-sectors-in-service-industry-between-2004-and-2013
#13
Hyun-Woo Choi, Young-Ki Kim, Dong-Mug Kang, Jong-Eun Kim, Bo-Young Jang
BACKGROUND: 'Work related musculoskeletal disorders (WRMSDs)' have been mostly reported in the manufacturing industry but recently the occurrence of industrial injuries has been constantly increasing in the service industry. This research is going to analyze the data about workers' compensation for WRMSDs in five different service sectors and identify characteristics of occupations with the highest approved occupations. METHODS: According to the data released from the Korea Worker's Compensation & Welfare Service, the overview of 12,730 cases of workers' compensation for WRMSDs in five service sectors from 2004 to 2013 is going to be analyzed and the source data is going to be classified by the Korean Standard Classification of Occupations to select the top five occupations that have the highest number of approval...
2017: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28935988/a-smart-thermo-and-ph-responsive-microfiltration-membrane-based-on-three-dimensional-inverse-colloidal-crystals
#14
Bing Yu, Qianqian Song, Hailin Cong, Xiaodan Xu, Dongwei Han, Zhongmin Geng, Xiaoyan Zhang, Muhammad Usman
In this paper, a thermo- and pH-responsive microfiltration membrane was prepared based on three-dimensional (3D) inverse colloidal crystals (ICC). To manufacture the smart ICC membrane, the typical thermo-responsive N-isopropylacrylamide (NIPAM) and pH-responsive methacrylic acid (MAA) were polymerized inside silica colloidal crystals. The smart ICC membranes were characterized by SEM, IR and contact angle measurements. Moreover, the permeability of smart microfiltration membrane was carried out by the KCl diffusion tests...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935954/process-signatures-in-glatiramer-acetate-synthesis-structural-and-functional-relationships
#15
Víctor R Campos-García, Daniel Herrera-Fernández, Carlos E Espinosa-de la Garza, German González, Luis Vallejo-Castillo, Sandra Avila, Leslie Muñoz-García, Emilio Medina-Rivero, Néstor O Pérez, Isabel Gracia-Mora, Sonia Mayra Pérez-Tapia, Rodolfo Salazar-Ceballos, Lenin Pavón, Luis F Flores-Ortiz
Glatiramer Acetate (GA) is an immunomodulatory medicine approved for the treatment of multiple sclerosis, whose mechanisms of action are yet to be fully elucidated. GA is comprised of a complex mixture of polypeptides with different amino acid sequences and structures. The lack of sensible information about physicochemical characteristics of GA has contributed to its comprehensiveness complexity. Consequently, an unambiguous determination of distinctive attributes that define GA is of highest relevance towards dissecting its identity...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935923/formation-and-purification-of-tailored-liposomes-for-drug-delivery-using-a-module-based-micro-continuous-flow-system
#16
Nikolay Dimov, Elisabeth Kastner, Maryam Hussain, Yvonne Perrie, Nicolas Szita
Liposomes are lipid based bilayer vesicles that can encapsulate, deliver and release low-soluble drugs and small molecules to a specific target site in the body. They are currently exploited in several nanomedicine formulations. However, their development and application is still limited by expensive and time-consuming process development and production methods. Therefore, to exploit these systems more effectively and support the rapid translation of new liposomal nanomedicines from bench to bedside, new cost-effective and scalable production methods are needed...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935592/manufacture-of-fibrous-dosage-forms-by-wet-micro-patterning-and-drying
#17
Aron H Blaesi, Nannaji Saka
Recently, we have introduced fibrous dosage forms prepared by the predictable deposition, or 3D-micro-patterning, of a drug-laden fibrous melt on a surface. Such dosage forms enable precisely controlled microstructures and drug release rates, and can be manufactured by an efficient, continuous melt process. However, the applicability of melt-processing to manufacture pharmaceutical dosage forms is limited because the temperatures at which suitable excipients plasticize by melting are greater than the degradation or melting temperatures of many kinds of drugs...
September 18, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28935523/an-outbreak-of-burkholderia-cepacia-pseudobacteraemia-caused-by-intrinsically-contaminated-commercial-0-5-chlorhexidine-solution-in-neonatal-intensive-care-units
#18
Je Eun Song, Yee Gyung Kwak, Tae Hyun Um, Chong Rae Cho, Sollip Kim, In Sook Park, Jong Hee Hwang, Namhee Kim, Gang-Bok Oh
BACKGROUND: Burkholderia cepacia is intrinsically resistant to certain antiseptics. We experienced a sudden increase in the frequency of isolation of B. cepacia from blood cultures in a neonatal intensive care unit (NICU) of a university-affiliated hospital. AIM: An investigation was conducted to identify the source and to intervene in the ongoing infections. METHODS: The cases were defined as patients with positive blood cultures for B. cepacia in a NICU between November 2014 and January 2015...
September 18, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28935306/suprasternal-aortic-valve-replacement-key-technology-and-techniques
#19
Andy C Kiser, Thomas G Caranasos, Mark D Peterson, Christopher E Buller, Michael A Borger
PURPOSE: Suprasternal transcatheter aortic valve replacement offers patients, with unsuitable femoral artery anatomy, an alternative to transapical, direct aortic, and subclavian approaches. DESCRIPTION: The Transit System (Aegis Surgical, Galway, Ireland) enables transcatheter aortic valve replacement directly into the ascending aorta or innominate artery through a small, suprasternal incision. The valve introducer sheath is inserted through a standard pursestring suture, which facilitates secure arterial closure...
October 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28935256/application-of-feedback-control-and-in-situ-milling-to-improve-particle-size-and-shape-in-the-crystallization-of-a-slow-growing-needle-like-active-pharmaceutical-ingredient
#20
Yang Yang, Kanjakha Pal, Andy Koswara, Qingqing Sun, Yuqi Zhang, Justin Quon, Rahn McKeown, Charles Goss, Zoltan K Nagy
Control of crystal size and shape is crucially important for crystallization process development in the pharmaceutical industries. In general crystals of large size and low aspect ratio are desired for improved downstream manufacturability. It can be extremely challenging to design crystallization processes that achieve these targets for active pharmaceutical ingredients (APIs) that have very slow growth kinetics and needle-like morphology. In this work, a batch cooling crystallization process for a GlaxoSmithKline patented API, which is characterized by very slow growth rate and needle morphology, was studied and improved using process analytical technology (PAT) based feedback control techniques and in situ immersion milling...
September 18, 2017: International Journal of Pharmaceutics
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