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https://www.readbyqxmd.com/read/28918582/removal-of-endrin-and-dieldrin-isomeric-pesticides-through-stereoselective-adsorption-behavior-on-the-graphene-oxide-magnetic-nanoparticles
#1
Kamlesh Shrivas, Archana Ghosale, Nidhi Nirmalkar, Arti Srivastava, Sunil Kumar Singh, Sandip S Shinde
A novel stereoselective removal behavior of isomeric endrin and dieldrin pesticides from sample solution is demonstrated using nanocomposite of graphene oxide (GO) and iron oxide (Fe3O4) magnetic nanoparticles (MNPs). The removal efficiency of endrin and dieldrin was found higher when GO-MNPs was used as a separating probe than the individual use of GO and MNPs. The removal efficiency of both the pesticides was found to be more favorable when the dosage amount of GO-MNPs was 30 mg for 30-min contact time with pH 4...
September 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28918230/biosensing-methods-for-determination-of-triglycerides-a-review
#2
REVIEW
C S Pundir, Vinay Narwal
Triglycerides (TGs) are the major transporters of dietary fats throughout the bloodstream. Besides transporting fat, TGs also act as stored fat in adipose tissue, which is utilized during insufficient carbohydrates supply. TG level is below 150mg/dL in healthy persons. Elevated TGs level in blood over 500mg/dL is a biomarker for cardiovascular diseases, Alzheimer disease, pancreatitis and diabetes. Numerous methods are accessible for recognition of TGs, among them, most are cumbersome, time-consuming, require sample pre-treatment, high cost instrumental set-up and experienced personnel to operate...
September 9, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28917970/how-do-enzymes-meet-nanoparticles-and-nanomaterials
#3
REVIEW
Ming Chen, Guangming Zeng, Piao Xu, Cui Lai, Lin Tang
Enzymes are fundamental biological catalysts responsible for biological regulation and metabolism. The opportunity for enzymes to 'meet' nanoparticles and nanomaterials is rapidly increasing due to growing demands for applications in nanomaterial design, environmental monitoring, biochemical engineering, and biomedicine. Therefore, understanding the nature of nanomaterial-enzyme interactions is becoming important. Since 2014, enzymes have been used to modify, degrade, or make nanoparticles/nanomaterials, while numerous nanoparticles/nanomaterials have been used as materials for enzymatic immobilization and biosensors and as enzyme mimicry...
September 13, 2017: Trends in Biochemical Sciences
https://www.readbyqxmd.com/read/28917872/crystalline-nanocellulose-lauric-arginate-complexes
#4
Kai Chi, Jeffrey M Catchmark
As a novel sustainable nanomaterial, crystalline nanocellulose (CNC) possesses many unique characteristics for emerging applications in coatings, emulsions, paints, pharmaceutical formulations, and other aqueous composite systems where interactions with oppositely charged surfactants are commonly employed. Herein, the binding interactions between sulfated CNC and a novel biologically-derived cationic surfactant lauric arginate (LAE) were comprehensively examined. Ionic strength and solution pH are two crucial factors in determining the adsorption of LAE to the CNC surface...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917869/high-aspect-ratio-phospho-calcified-rock-candy-like-cellulose-nanowhiskers-of-wastepaper-applicable-in-osteogenic-differentiation-of-hmscs
#5
Mohsen Shahrousvand, Fatemeh Ahmadi Tabar, Ehsan Shahrousvand, Amir Babaei, Mohammad Mahdi Hasani-Sadrabadi, Gity Mir Mohamad Sadeghi, Hafez Jafari, Ali Salimi
The aim of this study was to prepare cellulose nanowhiskers (CNWs) from wastepaper powder (WPP), as an environmentally friendly approach for obtaining the source material, which is a highly available and low-cost precursor for cellulose nanomaterial processing. Acid hydrolysis and calcification treatments were employed for extraction of CNWs and preparation of novel phospho-calcified cellulose nanowhiskers (PCCNWs). CNWs and PCCNWs were analyzed through optical microscopy (OM), scanning electron microscopy (SEM), Fourier-transformed infrared spectra (FTIR) and X-ray diffraction analysis (XRD)...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917860/carbon-materials-derived-from-chitosan-cellulose-cryogel-supported-zeolite-imidazole-frameworks-for-potential-supercapacitor-application
#6
Zehui Li, Lan Yang, Hongbin Cao, Yu Chang, Kexin Tang, Zhiqin Cao, Junjun Chang, Youpeng Cao, Wenbo Wang, Meng Gao, Chenming Liu, Dagang Liu, He Zhao, Yi Zhang, Mingjie Li
In order to promote sustainable development, green and renewable clean energy technologies continue to be developed to meet the growing demand for energy, such as supercapacitor, fuel cells and lithium-ion battery. It is urgent to develop appropriate nanomaterials for these energy technologies to reduce the volume of the device, improve the efficiency of energy conversion and enlarge the energy storage capacity. Here, chitosan/cellulose carbon cryogel (CCS/CCL) were designed and synthesized. Through the introduction of zeolite imidazole frameworks (ZIFs) into the chitosan/cellulose cryogels, the obtained materials showed a microstructure of ZIF-7 (a kind of ZIFs) coated chitosan/cellulose fibers (CS/CL)...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917855/chiroplasmonic-magnetic-gold-nanocomposites-produced-by-one-step-aqueous-method-using-%C3%AE%C2%BA-carrageenan
#7
Marina V Lesnichaya, Boris G Sukhov, Galina P Aleksandrova, Ekaterina R Gasilova, Tamara I Vakul'skaya, Spartak S Khutsishvili, Anatoliy N Sapozhnikov, Igor V Klimenkov, Boris A Trofimov
Novel water-soluble chiroplasmonic nanobiocomposites with directly varied gold content were synthesized by a one-step redox method in water using a biocompatible polysaccharide κ-carrageenan (industrial product from algae) as both reducing and stabilizing matrix. The influence of the reactants ratio, temperature, and pH on the reaction was studied and the optimal reaction parameters were found. The structure and the properties of composite nanomaterials were examined in solid state and aqueous solutions by using complementary physical-chemical methods X-ray diffraction analysis, transmission electron microscopy, spectroscopy of electron paramagnetic resonance, atomic absorption and optical spectroscopy, polarimetry including optical rotatory dispersion with registration of interphase-crossbred Cotton effect of a chiral polysaccharide matrix on plasmonic chromophore of gold nanoparticles, dynamic and static light scattering...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917776/apta-nanosensors-for-detection-and-quantitative-determination-of-acetamiprid-a-pesticide-residue-in-food-and-environment
#8
REVIEW
Asma Verdian
In an effort to achieve high sensitive and selective detection of pesticide residues, numerous nanomaterial-based aptasensors are currently being developed for acetamiprid analysis. Recently, aptamers as a potent alternative of antibodies are used in biosensing platforms. There is tremendous interest in utilizing of nanomaterial as basic building blocks and signaling elements in aptasensors. The nanomaterials have the unique optical and electrical properties. The combination of nanomaterial and aptamer technology has opened a new window in pesticide residues monitoring...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917502/fluorescence-and-magnetic-nanocomposite-fe3o4-sio2-au-mnps-as-peroxidase-mimetics-for-glucose-detection
#9
Shajie Luo, Yaqin Liu, Hanbing Rao, Yanying Wang, Xianxiang Wang
In this paper, multifunction nanoparticles (MNPs), Fe3O4@SiO2@Au MNPs, with properties of superparamagnetism, fluorescence and peroxidase-like catalytic activity were synthesized in the aqueous phase. The synthesized composites were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), powder diffraction (XRD), Fourier translation infrared spectrum (FT-IR) and fluorometer. The results show that the multifunctional nanomaterials have good magnetic and fluorescence properties...
September 13, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28916974/controlling-growth-high-uniformity-indium-selenide-in2se3-nanowires-via-the-rapid-thermal-annealing-process-at-low-temperature
#10
Ya-Chu Hsu, Yu-Chen Hung, Chiu-Yen Wang
High uniformity Au-catalyzed indium selenide (In2Se3) nanowires are grown with the rapid thermal annealing (RTA) treatment via the vapor-liquid-solid (VLS) mechanism. The diameters of Au-catalyzed In2Se3 nanowires could be controlled with varied thicknesses of Au films, and the uniformity of nanowires is improved via a fast pre-annealing rate, 100 °C/s. Comparing with the slower heating rate, 0.1 °C/s, the average diameters and distributions (standard deviation, SD) of In2Se3 nanowires with and without the RTA process are 97...
September 15, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28916111/icosahedral-plant-viral-nanoparticles-bioinspired-synthesis-of-nanomaterials-nanostructures
#11
REVIEW
Kannan Badri Narayanan, Sung Soo Han
Viral nanotechnology utilizes virus nanoparticles (VNPs) and virus-like nanoparticles (VLPs) of plant viruses as highly versatile platforms for materials synthesis and molecular entrapment that can be used in the nanotechnological fields, such as in next-generation nanoelectronics, nanocatalysis, biosensing and optics, and biomedical applications, such as for targeting, therapeutic delivery, and non-invasive in vivo imaging with high specificity and selectivity. In particular, plant virus capsids provide biotemplates for the production of novel nanostructured materials with organic/inorganic moieties incorporated in a very precise and controlled manner...
August 31, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28916045/evaluation-of-fluorogenic-substrates-for-ni-co-ldhs-peroxidase-mimic-and-application-for-determination-of-inhibitory-effects-of-antioxidant
#12
Li Su, Xinai Yu, Yexi Cai, Puhua Kang, Wenjie Qin, Wenpei Dong, Guojiang Mao, Suling Feng
Nanomaterial-based peroxidase-mimetics are an emerging research field that promises to produce alternatives to horseradish peroxidase for a variety of applications. Generally, some peroxidase-mimetics substrates are used in acidic condition (pH ≤ 7). Then, it is necessary to screen some peroxidase-mimetics substrates suitable for basic condition because that some peroxidase-mimetics leached ions in acidic solution. In this paper, using Ni/Co layered double hydroxides (LDHs) as a nano-peroxidase mimic model, we evaluated three fluorogenic substrates suitable for basic condition though experimental conditions, reaction kinetic and glucose detection assay...
September 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28915481/general-synthesis-of-hierarchical-c-mox-mno2-m-mn-cu-co-composite-nanofibers-for-high-performance-supercapacitor-electrodes
#13
Guangdi Nie, Xiaofeng Lu, Maoqiang Chi, Mu Gao, Ce Wang
Improving the conductivity and specific surface area of electrospun carbon nanofibers (CNFs) is beneficial to a rapid realization of their applications in energy storage field. Here, a series of one-dimensional C/MOx (M=Mn, Cu, Co) nanostructures are first prepared by a simple two-step process consisting of electrospinning and thermal treatment. The presence of low-valence MOx enhances the porosity and conductivity of nanocomposites to some extent through expanding graphitic domains or mixing metallic Cu into the CNF substrates...
September 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28915026/supercubes-supersquares-and-superrods-of-face-centered-cubes-fcc-atomic-and-electronic-requirements-of-mm-sr-l-pr-3-8-q-nanoclusters-m-coinage-metals-and-their-implications-with-respect-to-nucleation-and-growth-of-fcc-metals
#14
Boon K Teo, Huayan Yang, Juanzhu Yan, Nanfeng Zheng
Understanding the nucleation and growth pathways of nanocrystallites allows precise control of the size and shape of functional crystalline nanomaterials of importance in nanoscience and nanotechnology. This paper provides a detailed analysis of the stereochemical and electronic requirements of three series of nanoclusters based on face-centered cubes (fcc) as the basic building blocks, namely, 1-, 2-, and 3-D assemblages of fcc to form superrods (n), supersquares (n(2)), and supercubes (n(3)). The generating functions for calculating the numbers (and arrangements) of surface and interior metal atoms, as well as the number and dispositions of the ligands, for these particular sequences of fcc metal clusters of the general formula [Mm(SR)l(PR'3)8](q) (where M = coinage metals; SR = thiolates (or group XI ligands), and PR'3 = phosphines) are presented...
September 15, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28915005/a-novel-type-of-aqueous-dispersible-ultrathin-layered-double-hydroxide-nanosheets-for-in-vivo-bioimaging-and-drug-delivery
#15
Li Yan, Mengjiao Zhou, Xiujuan Zhang, Longbiao Huang, Wei Chen, Vellaisamy A L Roy, WenJun Zhang, Xianfeng Chen
Layered double hydroxide (LDH) nanoparticles have been widely used for various biomedical applications. However, because of the difficulty of surface functionalization of LDH nanoparticles, the systemic administration of these nanomaterials for in vivo therapy remains a bottleneck. In this work, we develop a novel type of aqueous dispersible two dimensional ultrathin LDH nanosheets with a size of about 50 nm and a thickness of about 1.4 to 4 nm. We are able to covalently attach positively charged Rhodamine B fluorescent molecules to the nanosheets and the nanohybrid retains strong fluorescence in liquid and even dry powder form...
September 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28914769/multifunctional-nanotechnology-enabled-sensors-for-rapid-capture-and-detection-of-pathogens
#16
REVIEW
Fatima Mustafa, Rabeay Y A Hassan, Silvana Andreescu
Nanomaterial-based sensing approaches that incorporate different types of nanoparticles (NPs) and nanostructures in conjunction with natural or synthetic receptors as molecular recognition elements provide opportunities for the design of sensitive and selective assays for rapid detection of contaminants. This review summarizes recent advancements over the past ten years in the development of nanotechnology-enabled sensors and systems for capture and detection of pathogens. The most common types of nanostructures and NPs, their modification with receptor molecules and integration to produce viable sensing systems with biorecognition, amplification and signal readout are discussed...
September 15, 2017: Sensors
https://www.readbyqxmd.com/read/28914610/fluorescent-j-aggregates-of-cyanine-dyes-basic-research-and-applications-review
#17
Julia L Bricks, Yuri L Slominsky, Ihor Panas, Aleksander Demchenko
J-aggregates are fascinating fluorescent nanomaterials formed by highly ordered assembly of organic dyes with the spectroscopic properties dramatically different from that of single or disorderly assembled dye molecules. They demonstrate very narrow red-shifted absorption and emission bands, strongly increased absorbance together with the decrease of radiative lifetime, highly polarized emission and other valuable features. The mechanisms of their electronic transitions are understood by formation of delocalized excitons already on the level of several coupled monomers...
September 15, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28914553/nanomaterials-as-nanocarriers-a-critical-assessment-why-these-are-multi-chore-vanquisher-in-breast-cancer-treatment
#18
Sania Naz, Hira Shahzad, Attarad Ali, Muhammad Zia
Breast cancer is a group of diseases with various subtypes and leads to high mortality throughout the globe. Various conventional techniques are in practice to cure breast cancer but these techniques are linked with various shortcomings. Mostly these treatments are not site directed and cause toxicity towards normal cells. In order to overcome these issues, we need smart system that can deliver anticancer drugs to specific sites. Targeted drug delivery can be achieved via passive or active drug delivery using nanocarriers...
September 15, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28913810/effect-of-nanoscale-zero-valent-iron-confined-in-mesostructure-on-escherichia-coli
#19
Xia Sun, Yubo Yan, Mingyan Wang, Zhaoxiang Han
Nanoscale zero-valent iron particles (NZVIs) confined in the mesochannels of SBA-15 have superabilities in the remediation of contaminated groundwater. As a new kind of remediation nanomaterials, it is necessary to investigate the ecotoxicity of NZVIs/SBA-15 composites during their applications. In this study, we evaluated the toxicity of NZVIs/SBA-15 on Escherichia coli and proposed a possible mechanism. Compared with the bare NZVIs and SBA-15 surface-supported NZVIs at the same equivalent concentration of NZVIs (0...
September 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28913784/managing-wastes-as-green-resources-cigarette-butt-synthesized-pesticides-are-highly-toxic-to-malaria-vectors-with-little-impact-on-predatory-copepods
#20
Kadarkarai Murugan, Udaiyan Suresh, Chellasamy Panneerselvam, Rajapandian Rajaganesh, Mathath Roni, Al Thabiani Aziz, Jiang-Shiou Hwang, Kuppusamy Sathishkumar, Aruliah Rajasekar, Suresh Kumar, Abdullah A Alarfaj, Akon Higuchi, Giovanni Benelli
The development of novel mosquito control tools is a key prerequisite to build effective and reliable Integrated Vector Management strategies. Here, we proposed a novel method using cigarette butts for the synthesis of Ag nanostructures toxic to young instars of the malaria vector Anopheles stephensi, chloroquine (CQ)-resistant malaria parasites Plasmodium falciparum and microbial pathogens. The non-target impact of these nanomaterials in the aquatic environment was evaluated testing them at sub-lethal doses on the predatory copepod Mesocyclops aspericornis...
September 14, 2017: Environmental Science and Pollution Research International
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