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https://www.readbyqxmd.com/read/28335509/novel-diagnostic-and-predictive-biomarkers-in-pancreatic-adenocarcinoma
#1
REVIEW
John C Chang, Madappa Kundranda
Pancreatic ductal adenocarcinoma (PDAC) is a highly lethal disease for a multitude of reasons including very late diagnosis. This in part is due to the lack of understanding of the biological behavior of PDAC and the ineffective screening for this disease. Significant efforts have been dedicated to finding the appropriate serum and imaging biomarkers to help early detection and predict response to treatment of PDAC. Carbohydrate antigen 19-9 (CA 19-9) has been the most validated serum marker and has the highest positive predictive value as a stand-alone marker...
March 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335417/dna-sequencing-sensors-an-overview
#2
REVIEW
Jose Antonio Garrido-Cardenas, Federico Garcia-Maroto, Jose Antonio Alvarez-Bermejo, Francisco Manzano-Agugliaro
The first sequencing of a complete genome was published forty years ago by the double Nobel Prize in Chemistry winner Frederick Sanger. That corresponded to the small sized genome of a bacteriophage, but since then there have been many complex organisms whose DNA have been sequenced. This was possible thanks to continuous advances in the fields of biochemistry and molecular genetics, but also in other areas such as nanotechnology and computing. Nowadays, sequencing sensors based on genetic material have little to do with those used by Sanger...
March 14, 2017: Sensors
https://www.readbyqxmd.com/read/28335369/effect-of-nano-sio%C3%A2-on-the-hydration-and-microstructure-of-portland-cement
#3
Liguo Wang, Dapeng Zheng, Shupeng Zhang, Hongzhi Cui, Dongxu Li
This paper systematically studied the modification of cement-based materials by nano-SiO₂ particles with an average diameter of about 20 nm. In order to obtain the effect of nano-SiO₂ particles on the mechanical properties, hydration, and pore structure of cement-based materials, adding 1%, 3%, and 5% content of nano-SiO₂ in cement paste, respectively. The results showed that the reaction of nano-SiO₂ particles with Ca(OH)₂ (crystal powder) started within 1 h, and formed C-S-H gel. The reaction speed was faster after aging for three days...
December 15, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335367/investigating-polymer-metal-interfaces-by-grazing-incidence-small-angle-x-ray-scattering-from-gradients-to-real-time-studies
#4
REVIEW
Matthias Schwartzkopf, Stephan V Roth
Tailoring the polymer-metal interface is crucial for advanced material design. Vacuum deposition methods for metal layer coating are widely used in industry and research. They allow for installing a variety of nanostructures, often making use of the selective interaction of the metal atoms with the underlying polymer thin film. The polymer thin film may eventually be nanostructured, too, in order to create a hierarchy in length scales. Grazing incidence X-ray scattering is an advanced method to characterize and investigate polymer-metal interfaces...
December 10, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335341/design-and-electrochemical-study-of-platinum-based-nanomaterials-for-sensitive-detection-of-nitric-oxide-in-biomedical-applications
#5
REVIEW
Maduraiveeran Govindhan, Zhonggang Liu, Aicheng Chen
The extensive physiological and regulatory roles of nitric oxide (NO) have spurred the development of NO sensors, which are of critical importance in neuroscience and various medical applications. The development of electrochemical NO sensors is of significant importance, and has garnered a tremendous amount of attention due to their high sensitivity and selectivity, rapid response, low cost, miniaturization, and the possibility of real-time monitoring. Nanostructured platinum (Pt)-based materials have attracted considerable interest regarding their use in the design of electrochemical sensors for the detection of NO, due to their unique properties and the potential for new and innovative applications...
November 14, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335340/recent-advances-in-chiral-nematic-structure-and-iridescent-color-of-cellulose-nanocrystal-films
#6
REVIEW
Derek G Gray
One unique property of cellulose nanocrystals (CNC) is their property of forming suspensions with chiral nematic order. This order can be preserved in films cast from the suspensions, raising the possibility of applications as photonic materials and templates. However, it has proved difficult to generate uniform, well-ordered chiral nematic materials from CNC. Recently, the importance of kinetic arrest due to gel formation in the later stages of evaporation has been recognized as a key step in film formation...
November 14, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335285/graphene-and-carbon-quantum-dot-based-materials-in-photovoltaic-devices-from-synthesis-to-applications
#7
REVIEW
Sofia Paulo, Emilio Palomares, Eugenia Martinez-Ferrero
Graphene and carbon quantum dots have extraordinary optical and electrical features because of their quantum confinement properties. This makes them attractive materials for applications in photovoltaic devices (PV). Their versatility has led to their being used as light harvesting materials or selective contacts, either for holes or electrons, in silicon quantum dot, polymer or dye-sensitized solar cells. In this review, we summarize the most common uses of both types of semiconducting materials and highlight the significant advances made in recent years due to the influence that synthetic materials have on final performance...
August 25, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335278/recent-prospects-in-the-inline-monitoring-of-nanocomposites-and-nanocoatings-by-optical-technologies
#8
REVIEW
Elodie Bugnicourt, Timothy Kehoe, Marcos Latorre, Cristina Serrano, Séverine Philippe, Markus Schmid
Nanostructured materials have emerged as a key research field in order to confer materials with unique or enhanced properties. The performance of nanocomposites depends on a number of parameters, but the suitable dispersion of nanoparticles remains the key in order to obtain the full nanocomposites' potential in terms of, e.g., flame retardance, mechanical, barrier, thermal properties, etc. Likewise, the performance of nanocoatings to obtain, for example, tailored surface affinity with selected liquids (e.g...
August 19, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335253/soft-interaction-in-liposome-nanocarriers-for-therapeutic-drug-delivery
#9
REVIEW
Domenico Lombardo, Pietro Calandra, Davide Barreca, Salvatore Magazù, Mikhail A Kiselev
The development of smart nanocarriers for the delivery of therapeutic drugs has experienced considerable expansion in recent decades, with the development of new medicines devoted to cancer treatment. In this respect a wide range of strategies can be developed by employing liposome nanocarriers with desired physico-chemical properties that, by exploiting a combination of a number of suitable soft interactions, can facilitate the transit through the biological barriers from the point of administration up to the site of drug action...
June 25, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335238/selective-plasma-etching-of-polymeric-substrates-for-advanced-applications
#10
REVIEW
Harinarayanan Puliyalil, Uroš Cvelbar
In today's nanoworld, there is a strong need to manipulate and process materials on an atom-by-atom scale with new tools such as reactive plasma, which in some states enables high selectivity of interaction between plasma species and materials. These interactions first involve preferential interactions with precise bonds in materials and later cause etching. This typically occurs based on material stability, which leads to preferential etching of one material over other. This process is especially interesting for polymeric substrates with increasing complexity and a "zoo" of bonds, which are used in numerous applications...
June 7, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335191/nanostructured-materials-for-li-ion-batteries-and-beyond
#11
EDITORIAL
Xifei Li, Xueliang Sun
This Special Issue "Nanostructured Materials for Li-Ion Batteries and Beyond" of Nanomaterials is focused on advancements in the synthesis, optimization, and characterization of nanostructured materials, with an emphasis on the application of nanomaterials for building high performance Li-ion batteries (LIBs) and future systems.[...].
April 7, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333580/air-quality-measurements-from-rubber-bands-to-tapping-the-rainbow
#12
George M Hidy, Peter K Mueller, Samuel L Altshuler, Judith C Chow, John G Watson
It is axiomatic that good measurements are integral to good public policy for environmental protection. The generalized term for "measurements" includes sampling and quantitation, data integrity, documentation, network design, sponsorship and operations, and archiving and accessing for applications. Each of these components has evolved and advanced over the last 200 years as knowledge of atmospheric chemistry and physics has matured. Air quality was first detected by what people could see smoke and smell contaminated air...
March 23, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28333433/high-performance-complementary-transistors-and-medium-scale-integrated-circuits-based-on-carbon-nanotube-thin-films
#13
Zhiyong Zhang, Yingjun Yang, Li Ding, Jie Han, Lian-Mao Peng
Solution-derived carbon nanotube (CNT) network films with high semiconducting purity are suitable materials for the wafer-scale fabrication of field-effect transistors (FETs) and integrated circuits (ICs). However, it is challenging to realize high-performance complementary metal-oxide-semiconductor (CMOS) FETs with high yield and stability on such CNT network films, and this difficulty hinders the development of CNT-film-based ICs. In this work, we developed a doping-free process for the fabrication of CMOS FETs based on solution-processed CNT network films, in which the polarity of the FETs was controlled by using Sc or Pd as the source/drain contacts to selectively inject carriers into the channels...
March 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28333156/an-in-vitro-bacterial-surface-migration-assay-underneath-sterile-barrier-material-commonly-found-in-a-hospital-setting
#14
J D Shih, L S Y Wood, C L Dambkowski, S Torres, E F Chehab, R Venook, J K Wall
OBJECTIVE: To determine what barrier material used in hospital neonatal intensive care units most effectively blocks bacterial migration. STUDY DESIGN: Bacterial migration distance was compared across simple and complex solid media using Escherichia coli, an early and common neonatal gut colonizer, and Staphylococcus aureus, a common skin bacterium, across polystyrene, medical-grade silicone, hydrocolloid dressing and transparent film dressing as barrier materials on complex solid media...
March 23, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28333065/preparation-of-mesoporous-tio2-with-enhanced-photocatalytic-activity-towards-tannery-wastewater-degradation
#15
Weiwei Zhao, Xiu He, Yu Peng, Hongfeng Zhang, Donglan Sun, Xiaocong Wang
Ordered mesoporous TiO2 materials are successfully synthesized via a sol-gel route using butyl titanate as a precursor and sodium dodecyl benzene sulfonate surfactants as soft templates. The as-prepared TiO2 samples possess a relatively high surface area of 40.03 m(2)/g and the center of pore diameter distribution of 13.04 nm. They exhibit excellent photocatalytic activity towards degradation of organic pollutants in tannery wastewater under UV-light and natural sunlight irradiation. The effect of the catalyst dosage, the pH value of the solution and the concentration of H2O2 are discussed in detail...
March 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28332850/integrating-molecular-control-to-improve-cryopreservation-outcome
#16
John G Baust, Kristi K Snyder, Robert Van Buskirk, John M Baust
Cryopreservation (CP) is a critical component in enabling on-demand access to biological material (macromolecules, cells, and tissues), yet CP has evolved little over the last several decades. Today's CP processes often yield a suboptimal "product," which has slowed progression in areas such as cell therapy and stem cell research. Recent discoveries focusing on molecular control and buffering of cell stress responses to CP as well as the development of new devices that improve sample freezing and thawing are now providing a path to improve sample quality...
March 23, 2017: Biopreservation and Biobanking
https://www.readbyqxmd.com/read/28332673/hierarchical-porous-nico2o4-nanosheet-arrays-directly-grown-on-carbon-cloth-with-superior-lithium-storage-performance
#17
Li Zhao, Lei Wang, Peng Yu, Chungui Tian, He Feng, Zhongwei Diao, Honggang Fu
Binary metal oxides have been explored as advanced candidates in lithium-ion battery (LIB) anodes due to their high specific capacity. Herein, the hierarchical structures of porous NiCo2O4 nanosheets directly grown on a conductive carbon cloth substrate (3D NCO-PSA/CC) were obtained by a facile in situ synthetic strategy. When applied as a binder-free LIB anode, it exhibited satisfactory performance with a high discharge capacity (a first discharge capacity of 2090.8 mA h g(-1) and a stable capacity of 1687...
March 23, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28332663/surface-chemistry-of-group-ib-metals-and-related-oxides
#18
REVIEW
Weixin Huang, Guanghui Sun, Tian Cao
Understanding the surface chemistry of solid catalysts is of great importance for the rational design of structures of advanced catalysts; however, long-term challenges remain due to the complex and non-uniform catalyst structures and the lack of suitable characterization techniques. Surface chemistry studies of single-crystal-based model catalysts with well-defined surface structures under ultra-high vacuum conditions have been developed as one approach, but the so-called materials gap and pressure gap are sometimes encountered when the acquired understanding is extended to the industrial reaction conditions...
March 23, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28332612/superhydrophobic-hbn-regulated-sponges-with-excellent-absorbency-fabricated-using-a-green-and-facile-method
#19
Ying Zhou, Yao Wang, Tengfei Liu, Gang Xu, Guangming Chen, Huayi Li, Lichun Liu, Qiqi Zhuo, Jiaoxia Zhang, Chao Yan
The world faces severe environmental, human and ecological problems when major oil spills and organic discharges are released into the environment. And so it is imperative to develop tools and high performance innovative materials that can efficiently absorb these organic discharges. Furthermore, green, facile methods to produce these advanced materials are also needed. In this paper, we demonstrate a novel porous supersponge based on melamine coated with hBN. This superhydrophobic sponge (with a contact angle >150°) exhibits excellent absorption performance for oils and organic solvents, including good selectivity, high capacity (up to 175 g·g(-1)) and extraordinary recyclability (less than 20% decline after 30 cycles of absorption/squeezing)...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28332537/mapping-vibrational-surface-and-bulk-modes-in-a-single-nanocube
#20
Maureen J Lagos, Andreas Trügler, Ulrich Hohenester, Philip E Batson
Imaging of vibrational excitations in and near nanostructures is essential for developing low-loss infrared nanophotonics, controlling heat transport in thermal nanodevices, inventing new thermoelectric materials and understanding nanoscale energy transport. Spatially resolved electron energy loss spectroscopy has previously been used to image plasmonic behaviour in nanostructures in an electron microscope, but hitherto it has not been possible to map vibrational modes directly in a single nanostructure, limiting our understanding of phonon coupling with photons and plasmons...
March 22, 2017: Nature
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