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Giorgio Vilardi, Thanasis Mpouras, Dimitris Dermatas, Nicola Verdone, Angeliki Polydera, Luca Di Palma
Carbon Nanotubes (CNTs) and nano Zero-Valent Iron (nZVI) particles, as well as two nanocomposites based on these novel nanomaterials, were employed as nano-adsorbents for the removal of hexavalent chromium, selenium and cobalt, from aqueous solutions. Nanomaterials characterization included the determination of their point of zero charge and particle size distribution. CNTs were further analyzed using scanning electron microscopy, thermogravimetric analysis and Raman spectroscopy to determine their morphology and structural properties...
March 5, 2018: Chemosphere
Daniel Amgar, Tal Binyamin, Vladimir Uvarov, Lioz Etgar
One of the most attractive features of perovskite materials is their chemical flexibility. Due to innovative chemical compositions of perovskites, their optical and structural properties, and functionalities have become more advanced, enabling better solar performance in photovoltaics, as well as robustness and excellent properties in the nanoscale for optoelectronics. The quest for novel perovskite compositions in the nano-scale is significantly important. This paper reports on a mixed-cation system of RbxCs1-xPbX3 (where X = Cl or Br) nanoparticles...
March 16, 2018: Nanoscale
Mikhail A Sevost'yanov, Elena O Nasakina, Alexander S Baikin, Konstantin V Sergienko, Sergey V Konushkin, Mikhail A Kaplan, Alexey V Seregin, Alexander V Leonov, Valery A Kozlov, Alexey V Shkirin, Nikolai F Bunkin, Alexey G Kolmakov, Sergey V Simakov, Sergey V Gudkov
A technology for obtaining materials from nanostructured nitinol with titanium- or tantalum-enriched surface layers was developed. Surface layers enriched with titanium or tantalum were shown to provide a decrease in the formation of reactive oxygen species and long-lived protein radicals in comparison to untreated nitinol. It was determined that human peripheral vessel myofibroblasts and human bone marrow mesenchymal stromal cells grown on nitinol bases coated with titanium or tantalum-enriched surface layers exhibit a nearly two times higher mitotic index...
March 15, 2018: Journal of Materials Science. Materials in Medicine
Irena Misiewicz-Krzeminska, Luis Antonio Corchete, Elizabeta A Rojas, Joaquín Martínez-López, Ramón García-Sanz, Albert Oriol, Joan Bladé, Juan José Lahuerta, Jesús San Miguel, María Victoria Mateos, Norma C Gutiérrez
Protein analysis in bone marrow samples from patients with multiple myeloma has been limited by the low protein concentration obtained after CD138+ selection. A novel approach based on capillary nano-immunoassay could make it possible to automatically quantify dozens of proteins from each myeloma sample. Here, we present a method for the accurate and robust quantification of the expression of multiple proteins extracted from CD138-purified multiple myeloma samples frozen in RLT Plus buffer, which is commonly used for nucleic acid preservation and isolation...
March 15, 2018: Haematologica
P A Stapleton, C R McBride, J Yi, A B Abukabda, T R Nurkiewicz
Preconceptive health encompasses male and female reproductive capability. In females, this takes into account each of the stages of the estrous cycle. Microvascular reactivity varies throughout the estrous cycle in response to hormonal changes and in preparation for pregnancy. Microvascular alterations in response to engineered nanomaterial (ENM) exposure have been described within 24-hours of inhalation; however, the impact upon the uterine vasculature at differing estrous stages and at late-stage pregnancy is unclear...
March 12, 2018: Reproductive Toxicology
Iwona Sembratowicz, Katarzyna Ognik
Gold nanoparticles (AuNPs) are one of the most examined nanomaterials, but information about their immunogenic potential is still insufficient. Understanding interaction of AuNPs with immune system is essential in designing their safety and possibilities of biomedical applications. An experiment was conducted to determine immunotropic activity of gold nanocolloid (AuNPs) administered orally to chickens depending on dose and duration time. 162 birds were assigned to 9 experimental groups of 18 birds each. The control group (C) did not receive AuNPs...
May 2018: Journal of Trace Elements in Medicine and Biology
Lilian Cristina Pereira, Murilo Pazin, Mariana Furio Franco-Bernardes, Airton da Cunha Martins, Gustavo Rafael Mazzaron Barcelos, Márcio Cesar Pereira, João Paulo Mesquita, Jairo Lisboa Rodrigues, Fernando Barbosa, Daniel Junqueira Dorta
Nanotechnology is a growing branch of science that deals with the development of structural features bearing at least one dimension in the nano range. More specifically, nanomaterials are defined as objects with dimensions that range from 1 to 100 nm, which give rise to interesting properties. In particular, silver and titanium nanoparticles (AgNPs and TiNPs, respectively) are known for their biological and biomedical properties and are often used in consumer products such as cosmetics, food additives, kitchen utensils, and toys...
May 2018: Journal of Trace Elements in Medicine and Biology
Amarjeet Singh, Bhavana Sharma, Renu Deswal
In the present study, we report perhaps for the first time the use of novel varieties of Brassica oleracea var. botrytis and Raphanus sativus as potential bioreductant, to synthesize highly stable silver nanoparticles (AgNPs, no aggregation observed for six months), which is a significant finding as plant extract-directed AgNPs are intrinsically unstable and tend to aggregate. The reduction of Ag+ to Ag0 nanostructures was confirmed using UVVis spectroscopy showing SPR spectra at 400-435 nm. Nanosight and transmission electron microscope (TEM) analysis showed monodisperse spherical AgNPs (4-18 nm)...
May 2018: Journal of Trace Elements in Medicine and Biology
Ali Deniz Dalgic, Ammar Zeidan Alshemary, Ayşen Tezcaner, Dilek Keskin, Zafer Evis
In this study, novel graphene oxide-incorporated silicate-doped nano-hydroxyapatite composites were prepared and their potential use for bone tissue engineering was investigated by developing an electrospun poly(ε-caprolactone) scaffold. Nanocomposite groups were synthesized to have two different ratios of graphene oxide (2 and 4 wt%) to evaluate the effect of graphene oxide incorporation and groups with different silicate-doped nano-hydroxyapatite content was prepared to investigate optimum concentrations of both silicate-doped nano-hydroxyapatite and graphene oxide...
January 1, 2018: Journal of Biomaterials Applications
Jianguo Li, Roger Beuerman, Chandra Verma
Molecular aggregation plays a significant role in modulating the solubility, permeability, and bioactivity of drugs. The propensity to aggregate depends on hydrophobicity and on molecular shape. Molecular dynamics simulations coupled with enhanced sampling methods are used to explore the early stages of oligomerization of two drug molecules which have a strong aggregation propensity, but with contrasting molecule shapes: the antibiotic ciprofloxacin and the anticancer drug Nutlin-3A. The planar shape of ciprofloxacin induces the formation of stable oligomers at all cluster sizes...
March 14, 2018: Journal of Chemical Physics
Mandy Hei Man Leung, Amy Q Shen
The ability to control particle size and size distribution of nanoparticles for drug delivery is essential because it impacts on the biodistribution and cellular uptake of nanoparticles. We present a novel microfluidic assisted nanoprecipitation strategy that enables synthesis of surfactant-free curcumin encapsulated poly(lactide-co-glycolide) nanoparticles (Cur-PLGA NP) with adjustable particle diameters (30-70nm) and narrow particle size distribution (polydispersity index less than 0.2). Our Cur-PLGA NP exhibit excellent colloidal stability and inhibit degradation of curcumin...
March 15, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Jing Huang, Guohe Huang, Chunjiang An, Yuan He, Yao Yao, Peng Zhang, Jian Shen
Global water safety is facing great challenges due to increased population and demand. There is an urgent need to develop suitable water treatment strategy for small rural and remote communities in low-income developing countries. In order to find a low-cost solution, the reduction of E. coli using ceramic water disk coated with nano ZnO was investigated in this study. The performance of modified ceramic disk filters was influenced by several factors in the filter production process. Based on the factorial analysis, the pore size of the disk filters was the most significant factor for influencing E...
March 12, 2018: Environmental Pollution
Hidehito Adaniya, Martin Cheung, Cathal Cassidy, Masao Yamashita, Tsumoru Shintake
A new SEM-based in-line electron holography microscope has been under development. The microscope utilizes conventional SEM and BF-STEM functionality to allow for rapid searching of the specimen of interest, seamless interchange between SEM, BF-STEM and holographic imaging modes, and makes use of coherent low-energy in-line electron holography to obtain low-dose, high-contrast images of light element materials. We report here an overview of the instrumentation and first experimental results on gold nano-particles and carbon nano-fibers for system performance tests...
March 6, 2018: Ultramicroscopy
Somali Mukherjee, Sumi Ganguly, Krishnendu Manna, Sanchaita Mondal, Supratim Mahapatra, Debasis Das
Five new coordination polymers (CPs) namely, [{Zn(μ2 -H2 O)0.5 (5N3 -IPA)(2,2'-bpe)}]∞ (1), [{Zn(μ2 -H2 O)0.5 (5N3 -IPA)(1,10-phen)}]∞ (2), [{Zn(5N3 -IPA)(1,2-bpe)}]∞ (3), [{Zn(5N3 -IPA)(1,2-bpey)}]∞ (4), and [{Zn(H2 O)(5N3 -IPA)(4,4'-tme)}(H2 O)0.5 ]∞ (5) (5N3 -H2 IPA = 5-azidoisophthalic acid, 2,2'-bpe= 2,2'-bipyridine, 1,10-phen = 1,10-phenanthroline, 1,2-bpe = 1,2-bis(4-pyridyl)ethane, 1,2-bpey = 1,2-bis(4-pyridyl)ethylene, 4,4'-tme = 4,4'-trimethylenedipyridine), have been synthesized based on a mixed ligand approach adopting a solvothermal technique...
March 15, 2018: Inorganic Chemistry
Zishen Wang, Qin'e Zhang, Shichuan Long, Yangxi Luo, Peikai Yu, Zhibing Tan, Jie Bai, Baihua Qu, Yang Yang, Jia Shi, Hua Zhou, Zong-Yuan Xiao, Wenjing Hong, Hua Bai
We apply direct ink writing for the three-dimensional (3D) printing of polyaniline/reduced graphene oxide (PANI/RGO) with PANI/GO gel as printable ink. The PANI/GO gel inks for 3D printing are prepared via self-assembly of PANI and GO in a blend solvent of N-methyl-2-pyrrolidinone and water, and offer both shaping capability, self-sustainability, and electrical conductivity after reduction of GO. Interdigitated electrodes are fabricated by using the PANI/GO ink in 3D printing, and a planar solid-state supercapacitor is constructed, which exhibits high performance with specific capacitance of 1329 mF cm-2...
March 15, 2018: ACS Applied Materials & Interfaces
Hao Huang, Xiaohui Ren, Zhongjun Li, Huide Wang, Zongyu Huang, Hui Qiao, Pinghua Tang, Jinlai Zhao, Weiyuan Liang, Yanqi Ge, Jie Liu, Jianqing Li, Xiang Qi, Han Zhang
Two dimensional (2D) Bi nano-sheets had been employed to fabricate electrodes for broadband photo-detection. A series of characterization techniques including SEM and HRTEM verify that Bi nanosheets with intact lamellar structure have been obtained after facile liquid phase exfoliation. In the meanwhile, UV-Vis and Raman spectra are also carried out and confirm the inherent optical and physical properties of Bi nanosheets. Inherited from the topological characteristics of Bi bulk counterpart, the resultant Bi nanosheet-based photo-detector exhibits preferable photo-response activity as well as environmental robustness...
March 15, 2018: Nanotechnology
Fenhong Song, Dapeng Ju, Fangwei Gu, Yan Liu, Yuan Ji, Yulin Ren, Xiaocong He, Baoyong Sha, Ben Q Li, Qingzhen Yang
Electric field induced micro/nano patterns in thin polymer film, sometimes referred as electrohydrodynamic patterning, is a promising technique to fabricate micro/nano structures. Extensive attentions have been attracted due to its advantages in micro contact (easy demolding) and low cost. Although considerable work has been done on this technique, including both experimental and theoretical ones, there still appears a requirement for understanding the mechanism of electrohydrodynamic patterning. Thus we systematically studied the effect of different parameters on electrohydrodynamic patterning with a numerical phase field model...
March 15, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Peng Chen, Xiaohu Liu, Garima Goyal, Nhung Thi Tran, James Chin Shing Ho, Yi Wang, Daniel Aili, Bo Liedberg
Localized surface plasmon resonance (LSPR) constitutes a versatile technique for biodetection exploiting the sensitivity of plasmonic nanostructures to small changes in refractive index. The optical shift in the LSPR band caused by molecular in-teractions in the vicinity of the nanostructures are typically < 5 nm and can readily be detected using a spectrophotometer. Widespread use of LSPR based sensors require cost effective devices and would benefit from sensing schemes that enables use of very simple spectrophotometers or even naked eye detection...
March 15, 2018: Analytical Chemistry
Jing Ruan, Ying Wang, Fang Li, Renbing Jia, Guangming Zhou, Chunlin Shao, Liqi Zhu, Malin Cui, Da-Peng Yang, Shengfang Ge
Combination of drug chemotherapy and ray radiation is the main solution for treating patients with advanced colorectal carcinoma, but the toxicity and adverse effects caused in the surrounding normal tissues and the radio resistance in tumor site will severely influence its therapeutic effect. Nano radiosensitizer is an ideal choice for improving the tumor radiotherapy effects thanks to its high degree of tumor tissue uptake and secondary electrons productivity. Graphene quantum dots (GQDs) have good oxidative stress response and significantly high phototoxicity, and are regarded as a potential nano radiosensitizer...
March 15, 2018: ACS Applied Materials & Interfaces
Jon Ashley, Xiaotong Feng, Arnab Halder, Tongchang Zhou, Yi Sun
We describe a novel dispersive solid-phase imprinting technique for the production of nano-sized molecularly imprinted polymers (nanoMIPs) as plastic antibodies. The template was immobilized on in-house synthesized magnetic microspheres instead of conventional glass beads. As a result, high-affinity and template-free MIPs were produced in higher yields.
March 15, 2018: Chemical Communications: Chem Comm
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