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https://www.readbyqxmd.com/read/28214853/chronic-consumption-of-artificial-sweetener-in-packets-or-tablets-and-type-2-diabetes-risk-evidence-from-the-e3n-european-prospective-investigation-into-cancer-and-nutrition-study
#1
Guy Fagherazzi, Gaëlle Gusto, Aurélie Affret, Francesca Romana Mancini, Courtney Dow, Beverley Balkau, Françoise Clavel-Chapelon, Fabrice Bonnet, Marie-Christine Boutron-Ruault
BACKGROUND: The influence of artificial sweeteners on metabolic diseases is controversial. Artificially sweetened beverages have been associated with an increased risk of type 2 diabetes (T2D) but biases and reverse causation have been suspected to have influenced the observed association. In addition, it has been suggested that investigation into the relationship between the frequency and duration of the consumption of packet or tablet artificial sweeteners and T2D risk is necessary...
February 18, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28214746/a-magnetite-pmaa-nanospheres-targeting-sers-aptasensor-for-tetracycline-sensing-using-mercapto-molecules-embedded-core-shell-nanoparticles-for-signal-amplification
#2
Huanhuan Li, Quansheng Chen, Md Mehedi Hassan, Xiaoxing Chen, Qin Ouyang, Zhiming Guo, Jiewen Zhao
Surface-enhanced Raman scattering (SERS) biosensors have promising potential in the field of antibiotics detection because of their ultrahigh detection sensitivity. This paper reports a rapid and sensitive SERS-based magnetic nanospheres-targeting strategy for sensing tetracycline (TTC) using aptamer-conjugated magnetite colloid nanocrystal clusters (MCNCs)-polymethacrylic acid (PMAA) magnetic nanospheres (MNs) as the recognition and the Au/PATP/SiO2 (APS) as the labels. Initially, MNs were fabricated and conjugated with the aptamers through condensation reaction...
February 7, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28214703/polyester-fabric-sheet-layers-functionalized-with-graphene-oxide-for-sensitive-isolation-of-circulating-tumor-cells
#3
Jiyoon Bu, Young Jun Kim, Yoon-Tae Kang, Tae Hee Lee, Jeongsuk Kim, Young-Ho Cho, Sae-Won Han
The metastasis of cancer is strongly associated with the spread of circulating tumor cells (CTCs). Based on the microfluidic devices, which offer rapid recovery of CTCs, a number of studies have demonstrated the potential of CTCs as a diagnostic tool. However, not only the insufficient specificity and sensitivity derived from the rarity and heterogeneity of CTCs, but also the high-cost fabrication processes limit the use of CTC-based medical devices in commercial. Here, we present a low-cost fabric sheet layers for CTC isolation, which are composed of polyester monofilament yarns...
February 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28214583/remediation-of-fluoride-from-drinking-water-using-magnetic-iron-oxide-coated-hydrotalcite-chitosan-composite
#4
Kalimuthu Pandi, Soodamani Periyasamy, Natrayasamy Viswanathan
The present study was performed to examine the probability of magnetic iron oxide fabricated hydrotalcite/chitosan (Fe3O4@HTCS) composite for the removal of excess fluoride content from drinking water. The developed Fe3O4@HTCS composite not only demonstrate the good separation ability but also display an extreme enhanced defluoridation capacity (DC) when compared to other base components and composite. The DCs of Fe3O4@HTCS composite, Fe3O4@HT composite, Fe3O4, HT and CS was found to be 5032, 3041, 1050, 1030 and 52 mgF(-)/kg respectively...
February 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28214537/biomechanical-behavior-of-endodontically-treated-premolars-using-different-preparation-designs-and-cad-cam-materials
#5
Diogo Pedrollo Lise, Annelies Van Ende, Jan De Munck, Thaís Yumi Umeda Suzuki, Luiz Clovis Cardoso Vieira, Bart Van Meerbeek
OBJECTIVES: To evaluate the effect of restoration design ('2.5-mm deep endocrown', '5-mm deep endocrown' or '5-mm deep post&crown') and CAD/CAM material type (composite or lithium disilicate glass-ceramic) on the load-to-failure of endodontically treated premolars in absence of any ferrule. METHODS: The crowns of 48 single-rooted premolars were cut and the roots were endodontically treated. Teeth were randomly divided into six groups (n=8); teeth in each group were restored using one of the two tested materials with standardized CAD/CAM fabricated endocrowns (with either 2...
February 15, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28213846/fixation-of-bovine-pericardium-based-tissue-biomaterial-with-irreversible-chemistry-improves-biochemical-and-biomechanical-properties
#6
H Tam, W Zhang, D Infante, N Parchment, M Sacks, N Vyavahare
Bioprosthetic heart valves (BHVs), derived from glutaraldehyde crosslinked (GLUT) porcine aortic valve leaflets or bovine pericardium (BP), are used to replace defective heart valves. However, valve failure can occur within 12-15 years due to calcification and/or progressive structural degeneration. We present a novel fabrication method that utilizes carbodiimide, neomycin trisulfate, and pentagalloyl glucose crosslinking chemistry (TRI) to better stabilize the extracellular matrix of BP. We demonstrate that TRI-treated BP is more compliant than GLUT-treated BP...
February 17, 2017: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/28213329/thioaromatic-dna-monolayers-for-target-amplification-free-electrochemical-sensing-of-environmental-pathogenic-bacteria
#7
Rebeca Miranda-Castro, Raquel Sánchez-Salcedo, Beatriz Suárez-Álvarez, Noemí de-Los-Santos-Álvarez, Arturo J Miranda-Ordieres, María Jesús Lobo-Castañón
Genosensing technology has mostly based on mixed self-assembled monolayers (SAMs) of thiol-modified oligonucleotides and alkanethiols on gold surfaces. However, the typical backfilling approach, which incorporates the alkanethiol in a second step, gives rise to a heterogeneous distribution of oligonucleotide probes on the surface, negatively affecting to both hybridization efficiency and surface stability. Despite aromatic thiols present a remarkably different behavior from alkanethiols, with higher rigidity and stronger intermolecular interactions, they have been scarcely explored for the fabrication of DNA sensing platforms...
February 12, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28213275/a-single-microfluidic-chip-with-dual-surface-properties-for-protein-drug-delivery
#8
Mehrdad Bokharaei, Katayoun Saatchi, Urs O Häfeli
Principles of double emulsion generation were incorporated in a glass microfluidic chip fabricated with two different surface properties in order to produce protein loaded polymer microspheres. The microspheres were produced by integrating two microfluidic flow focusing systems and a multi-step droplet splitting and mixing system into one chip. The chip consists a hydrophobic and a hydrophilic section with two different heights, 12μm and 45μm, respectively. As a result, the protein is homogenously distributed throughout the polymer microsphere matrix, not just in its center (which has been studied before)...
February 14, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28213260/the-fabrication-of-carbon-nanotubes-array-based-electrochemical-chiral-sensor-by-electrosynthesis
#9
Hong Zhu, Fengxia Chang, Zhiwei Zhu
How to align the single-walled carbon nanotubes (SWCNTs) onto the electrode vertically and to control their density and orientation are still a major challenge. Theoretically, properly selected chiral SWCNTs can discriminate enantiomers through their different dielectric response to the adsorption of chiral species, few reports can confirm this theoretic model. Herein, we presented a new strategy to fabricate SWCNTs array-based electrochemical chiral sensor. Carboxylated chiral SWCNTs were vertically attached to the oxidized glass carbon electrode with ethylenediamine as a linker by electrosynthesis...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28213237/revealing-the-location-of-semen-vaginal-fluid-and-urine-in-stained-evidence-through-near-infrared-chemical-imaging
#10
Félix Zapata, Fernando E Ortega-Ojeda, Carmen García-Ruiz
Crime scene investigation (CSI) requires the ultimate available technology for a rapid, non-destructive, and accurate detection of a wide variety of evidence including invisible stains of bodily fluids. Particularly crucial is the discrimination of semen in stained evidence from sexual abuse cases. This is because those evidence have high odds of containing the DNA from the aggressor. To this aim, we demonstrated the potential of near infrared hyperspectral imaging (NIR-HSI) to make visible stains of semen, vaginal fluid, and urine on fabrics, which lays the bases to face the challenging visualization and discrimination of semen within bodily fluids mixtures...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28213236/the-extraction-of-uranium-using-graphene-aerogel-loading-organic-solution
#11
Mumei Chen, Zheng Li, Jihao Li, Jingye Li, Qingnuan Li, Lan Zhang
A new approach for uranium extraction employing graphene aerogel (GA) as a skeleton loading organic solution (GA-LOS) is proposed and investigated. Firstly, the GA with super-hydrophobicity and high organic solution absorption capacity was fabricated by one-step reduction and self-assembly of graphene oxide with ethylenediamine. By adsorbing Tri-n-butyl phosphate (TBP)/n-dodecane solution to prepare GA-LOS, the extraction of U(VI) from nitric acid medium using GA-LOS was investigated and compared with conventional solvent extraction...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28213225/a-melamine-based-molecularly-imprinted-sensor-for-the-determination-of-8-hydroxydeoxyguanosine-in-human-urine
#12
Neeraj Kumar, Rosy, Rajendra N Goyal
A sensitive and facile molecular imprinted sensor has been fabricated using edge plane pyrolytic graphite (EPPG) for the determination of an important oxidative DNA damage product, 8-hydroxydeoxyguanosine (8-OHdG). The molecularly imprinted polymer film was fabricated by electropolymerization of melamine in the presence of 8-OHdG, on glutaraldehyde/poly 1,5-diaminonaphthalene modified EPPG. The imprinted sensor surface was characterized by using Field Emission Scanning Electron Microscopy, Electron Impedance Spectroscopy, Cyclic Voltammetry, Square Wave Voltammetry and UV-visible spectroscopy...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28213216/graphene-quantum-dots-decorated-with-maleimide-and-zinc-tetramaleimido-phthalocyanine-application-in-the-design-of-off-on-fluorescence-sensors-for-biothiols
#13
Ojodomo J Achadu, Tebello Nyokong
The fabrication of maleimide-derivatized graphene quantum dots (M-GQDs) and zinc phthalocyanine (2) as novel sensor probes for the selective detection of biothiols (cysteine, homocysteine or glutathione) through the rapid and specific Michael addition reaction between biothiols and the maleimide-derivatized probes is presented in this study. GQDs directly functionalized with maleimide units (M-GQDs) were synthesized and deployed for biothiols recognition following the principle of Michael addition. M-GQDs probe was found to be highly sensitive and selective towards biothiols detection in the nanomolar range in aqueous solution and at physiological pH (7...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28213214/bifunctional-polydopamine-thin-film-coated-zinc-oxide-nanorods-for-label-free-photoelectrochemical-immunoassay
#14
Yan Yang, Weihua Hu
Photoelectrochemical (PEC) detection is a promising method for label-free immunoassay by reporting the specific biological recognition events with electrical signals. However, it is challenging to rationally incorporate immunosensing components with a photocurrent conversion interface, which generally necessitates multistep fabrication and careful tailoring of various components such as photoactive material and biological probe. For high detection reliability and reproducibility, it is highly desirable to rationally construct an efficient PEC interface with architecture as simple as possible...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28213146/linear-ultrasonic-motor-for-absolute-gravimeter
#15
Yue Jian, Zhiyuan Yao, Vadim V Silberschmidt
Thanks to their compactness and suitability for vacuum applications, linear ultrasonic motors are considered as substitutes for classical electromagnetic motors as driving elements in absolute gravimeters. Still, their application is prevented by relatively low power output. To overcome this limitation and provide better stability, a V-type linear ultrasonic motor with a new clamping method is proposed for a gravimeter. In this paper, a mechanical model of stators with flexible clamping components is suggested, according to a design criterion for clamps of linear ultrasonic motors...
February 1, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28213142/extraction-preparation-and-application-of-pigments-from-cordyline-fruticosa-and-hylocereus-polyrhizus-as-sensitizers-for-dye-sensitized-solar-cells
#16
Mahmoud A M Al-Alwani, Norasikin A Ludin, Abu Bakar Mohamad, Abd Amir H Kadhum, Kamaruzzaman Sopian
Current study employs mixture of chlorophyll-anthocyanin dye extracted from leaves of Cordyline fruticosa as new sensitizers for dye-sensitized solar cell (DSSCs), as well as betalains dye obtained from fruit of Hylocereus polyrhizus. Among ten pigments solvents, the ethanol and methanol extracts revealed higher absorption spectra of pigments extracted from C. fruticosa and H. polyrhizus respectively. A major effect of temperature increase was studied to increase the extraction yield. The results indicated that extraction temperature between 70 and 80°C exhibited a high dye concentration of each plant than other temperatures...
February 14, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28213101/additively-manufactured-metallic-porous-biomaterials-based-on-minimal-surfaces-a-unique-combination-of-topological-mechanical-and-mass-transport-properties
#17
F S L Bobbert, K Lietaert, A A Eftekhari, B Pouran, S M Ahmadi, H Weinans, A A Zadpoor
: Porous biomaterials that simultaneously mimic the topological, mechanical, and mass transport properties of bone are in great demand but are rarely found in the literature. In this study, we rationally designed and additively manufactured (AM) porous metallic biomaterials based on four different types of triply periodic minimal surfaces (TPMS) that mimic the properties of bone to an unprecedented level of multi-physics detail. Sixteen different types of porous biomaterials were rationally designed and fabricated using selective laser melting (SLM) from a titanium alloy (Ti-6Al-4V)...
February 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28213098/gelatin-based-3d-conduits-for-transdifferentiation-of-mesenchymal-stem-cells-into-schwann-cell-like-phenotypes
#18
Metin Uz, Melda Buyukoz, Anup D Sharma, Donald S Sakaguchi, Sacide Alsoy Altinkaya, Surya K Mallapragada
: In this study, gelatin-based 3D conduits with three different microstructures (nanofibrous, macroporous and ladder-like) were fabricated for the first time via combined molding and thermally induced phase separation (TIPS) technique for peripheral nerve regeneration. The effects of conduit microstructure and mechanical properties on the transdifferentiation of bone marrow-derived mesenchymal stem cells (MSCs) into Schwann cell (SC) like phenotypes were examined to help facilitate neuroregeneration and understand material-cell interfaces...
February 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28212931/uv-protective-poly-lactic-acid-rosin-films-for-sustainable-packaging
#19
Meenu Narayanan, Sravanthi Loganathan, Ravi Babu Valapa, Sabu Thomas, T O Varghese
Recently, biopolymer based plastic materials are regarded as potential alternative for conventional plastics of fossil fuel origin in order to compensate depleting petroleum resources and address environmental pollution issues. Poly(lactic acid) (PLA) is one among the biopolymers which is rapidly commercialized for food packaging application. However, the demerits accompanied with PLA like brittle nature, slower crystallization rate, poor gas barrier and high ultraviolet radiation transmission properties confines its commercial application in food packaging sector...
February 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28212488/graphene-oxide-glue-electrode-for-fabrication-of-vertical-elastic-conductive-columns
#20
Liusi Yang, Mingchu Zou, Shiting Wu, Wenjing Xu, Huaisheng Wu, Anyuan Cao
Graphene has a planar atomic structure with high flexibility, and might be used as ultra-thin conductive glues or adhesion layers in electronics and other applications. Here, we show that graphene oxide (GO) sheets condensed from solution can act as a pure, thin-layer, non-penetrating glue for fabrication of vertical architectures anchored on rigid and flexible substrates. Carbon nanotube (CNT) sponges are used as a porous template to make polymer-reinforced composite columns, to achieve both high conductivity and elastic behavior...
February 17, 2017: ACS Nano
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