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https://www.readbyqxmd.com/read/29778002/plasmonic-colorimetric-sensors-based-on-etching-and-growth-of-noble-metal-nanoparticles-strategies-and-applications
#1
REVIEW
Zhiyang Zhang, Han Wang, Zhaopeng Chen, Xiaoyan Wang, Jaebum Choo, Lingxin Chen
Plasmonic colorimetric sensors have emerged as a powerful tool in chemical and biological sensing applications due to the localized surface plasmon resonance (LSPR) extinction in the visible range. Among the plasmonic sensors, the most famous sensing mode is the "aggregation" plasmonic colorimetric sensor which is based on plasmon coupling due to nanoparticle aggregation. Herein, this review focuses on the newly-developing plasmonic colorimetric sensing mode - the etching or the growth of metal nanoparticles induces plasmon changes, namely, "non-aggregation" plasmonic colorimetric sensor...
May 9, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29777808/preparation-and-applications-of-glyconanoparticles
#2
Qilin Tang, Gangliang Huang
The glyconanoparticle can be used to construct biological cell models that are similar to the expression of carbohydrates on the surface of cells, and it has become excellent research tools in glycobiology, biopharmaceuticals, and materials science. With the deepening of research, glyconanoparticle has broad application prospects in drug delivery, biomedical imaging, diagnosis and treatment because its preparation is simple, and it has the unique physical, chemical and biological properties. The preparation of glyconanoparticles and their applications were summarized and discussed here...
May 16, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29774426/plant-physical-and-chemical-defence-variation-along-elevation-gradients-a-functional-trait-based-approach
#3
Alan Kergunteuil, Patrice Descombes, Gaetan Glauser, Loïc Pellissier, Sergio Rasmann
Predicting variation in plant functional traits related to anti-herbivore defences remains a major challenge in ecological research, considering that multiple traits have evolved in response to both abiotic and biotic conditions. Therefore, understanding variation in plant anti-herbivore defence traits requires studying their expression along steep environmental gradients, such as along elevation, where multiple biotic and abiotic factors co-vary. We expand on plant defence theory and propose a novel conceptual framework to address the sources of variations of plant resistance traits at the community level...
May 17, 2018: Oecologia
https://www.readbyqxmd.com/read/29774041/report-on-the-current-inventory-of-the-toolbox-for-plant-cell-wall-analysis-proteinaceous-and-small-molecular-probes
#4
REVIEW
Maja G Rydahl, Aleksander R Hansen, Stjepan K Kračun, Jozef Mravec
Plant cell walls are highly complex structures composed of diverse classes of polysaccharides, proteoglycans, and polyphenolics, which have numerous roles throughout the life of a plant. Significant research efforts aim to understand the biology of this cellular organelle and to facilitate cell-wall-based industrial applications. To accomplish this, researchers need to be provided with a variety of sensitive and specific detection methods for separate cell wall components, and their various molecular characteristics in vitro as well as in situ ...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29772906/visualization-and-semi-quantity-study-of-the-distribution-of-ma-jor-components-in-wheat-straw-in-mesoscopic-scale-using-ftir-microspectroscopic-imaging
#5
Zengling Yang, Jiaqi Mei, Zhiqiang Liu, Guangqun Huang, Guan Huang, Lujia Han
Understanding the biochemical heterogeneity of plant tissue linked to crop straw anatomy is attractive to plant researchers and researchers in the field of biomass-refinery. This study provides an in-situ analysis and semi-quantitative, visualization distributions of major composition distribution in internodal transverse sections of wheat straw based on FTIR microspec-troscopic imaging, with a fast Non-Negativity-Constrained Least Squares (fast NNLS) fitting. The paper investigates changes in biochemical components of tissue during stages of elongation, booting, heading, flowering, grain-filling, milk-ripening, dough, and full-ripening...
May 18, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29772760/a-review-of-carbon-nanomaterials-synthesis-via-the-chemical-vapor-deposition-cvd-method
#6
REVIEW
Yehia M Manawi, Ayman Samara, Tareq Al-Ansari, Muataz A Atieh
Carbon nanomaterials have been extensively used in many applications owing to their unique thermal, electrical and mechanical properties. One of the prime challenges is the production of these nanomaterials on a large scale. This review paper summarizes the synthesis of various carbon nanomaterials via the chemical vapor deposition (CVD) method. These carbon nanomaterials include fullerenes, carbon nanotubes (CNTs), carbon nanofibers (CNFs), graphene, carbide-derived carbon (CDC), carbon nano-onion (CNO) and MXenes...
May 17, 2018: Materials
https://www.readbyqxmd.com/read/29772722/ethnobotany-phytochemistry-and-pharmacological-effects-of-plants-in-genus-cynanchum-linn-asclepiadaceae
#7
REVIEW
Lu Han, Xiuping Zhou, Mengmeng Yang, Li Zhou, Xinxin Deng, Shijie Wei, Wenping Wang, Zhizhong Wang, Xue Qiao, Changcai Bai
Genus Cynanchum L. belongs to the family Asclepiadaceae, which comprise more than 200 species distributed worldwide. In Chinese medical practice, numerous drugs (such as tablets and powders) containing different parts of plants of this genus are used to treat snake bites, bruises, osteoblasts, rheumatoid arthritis and tumors. A search for original articles published on the cynanchum genus was performed by using several resources, including Flora of China Official Website and various scientific databases, such as PubMed, SciFinder, the Web of Science, Science Direct, and China Knowledge Resource Integrated (CNKI)...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772178/nanoliter-cell-culture-array-with-tunable-chemical-gradients
#8
Jonathan Avesar, Yaron Blinder, Hadar Aktin, Ariel Szklanny, Dekel Rosenfeld, Yonatan Savir, Moran Bercovici, Shulamit Levenberg
A multitude of cell screening assays for diagnostic and research applications rely on quantitative measurements of a sample in the presence of different reagent concentrations. Standard methods rely on microtiter plates of varying well density, which provide simple and standardized sample addressability. However, testing hundreds of chemical dilutions requires complex automation, and typical well volumes of microtiter plates are incompatible with the analysis of a small number of cells. Here, we present a microfluidic device for creating a high resolution chemical gradient spanning 200 nanoliter wells...
May 17, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29772177/capture-ferment-upgrade-a-three-step-approach-for-the-valorization-of-sewage-organics-as-commodities
#9
Abbas Alloul, Ramon Ganigue, Marc Spiller, Francis A Meerburg, Cristina Cagnetta, Korneel Rabaey, Siegfried E Vlaeminck
This critical review outlines a roadmap for the conversion of chemical oxygen demand (COD) contained in sewage to commodities based on three-steps: capture COD as sludge, ferment it to volatile fatty acids (VFA), and upgrade VFA to products. The article analyzes the state-of-the-art of this three-step approach and discusses the bottlenecks and challenges. The potential of this approach is illustrated for the European Union's 28 member states (EU-28) through Monte Carlo simulations. High-rate contact stabilization captures the highest amount of COD (66-86 gCOD person equivalent-1 day-1 in 60% of the iterations)...
May 17, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29771506/the-metabolic-chemical-reporter-6-azido-6-deoxy-glucose-further-reveals-the-substrate-promiscuity-of-o-glcnac-transferase-and-catalyzes-the-discovery-of-intracellular-protein-modification-by-o-glucose
#10
Narek Darabedian, Jinxu Gao, Kelly N Chuh, Christina M Woo, Matthew R Pratt
Metabolic chemical reporters of glycosylation in combination with bioorthogonal reactions have been known for two decades and have been used by many different research labs for the identification and visualization of glycoconjugates. More recently, however, they have begun to see utility for the investigation of cellular metabolism and the tolerance of biosynthetic enzymes and glycosyltransferases to dif-ferent sugars. Here, we take this concept one step further by using the metabolic chemical reporter 6-azido-6-deoxy-glucose (6AzGlc)...
May 17, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29771111/the-chemical-history-of-a-bubble
#11
Kenneth S Suslick, Nathan C Eddingsaas, David J Flannigan, Stephen D Hopkins, Hangxun Xu
Acoustic cavitation (the growth, oscillation, and rapid collapse of bubbles in a liquid) occurs in all liquids irradiated with sufficient intensity of sound or ultrasound. The collapse of such bubbles creates local heating and provides a unique source of energy for driving chemical reactions. In addition to sonochemical bond scission and formation, cavitation also induces light emission in many liquids. This phenomenon of sonoluminescence (SL) has captured the imagination of many researchers since it was first observed 85 years ago...
May 17, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29770663/-in-silico-cloning-and-comparative-analysis-of-nad1-gene-in-three-common-human-parasites
#12
Xie Jian, Zhao Yong-Xia, Yang Ming-Li, Zhang Zhi-Min, Jia Qi
OBJECTIVE: To in silico clone the NAD1 gene of three common parasites and analyze their bioinformatics, so as to lay the foundation for further research on the NAD gene. METHODS: By using the in silico cloning method, the full length cDNA (s) of NAD 1 genes of Clonorchis sinensis , Ascaris lumbricoides and Schistosoma japonicum were got, then their physical and chemical properties, compositions of amino acids, subcellular localizations, binary and ternary structures were contrastively analyzed...
April 25, 2018: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/29770507/flatlands-in-the-holy-land-the-evolution-of-layered-materials-research-in-israel
#13
REVIEW
Oded Hod, Michael Urbakh, Doron Naveh, Maya Bar-Sadan, Ariel Ismach
The experimental identification of fullerenes in 1985, carbon nanotubes in 1991, inorganic nanotubes in 1992, and graphene in 2004 are cornerstone events that have marked the beginning of the layered nanostructures era of materials science. Nowadays, the synthesis of such low-dimensional systems is a routine practice allowing the controlled fabrication of 0-, 1-, and 2D layered structures of diverse chemical compositions. These systems possess unique physical properties that stem from their structural anisotropy characterized by strong intralayer covalent bonding and weaker interlayer dispersive interactions...
May 16, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29770420/selenium-species-dependent-toxicity-bioavailability-and-metabolic-transformations-in-caenorhabditis-elegans
#14
Isabelle Rohn, Talke Anu Marschall, Nina Kroepfl, Kenneth Bendix Jensen, Michael Aschner, Simon Tuck, Doris Kuehnelt, Tanja Schwerdtle, Julia Bornhorst
The essential micronutrient selenium (Se) is required for various systemic functions, but its beneficial range is narrow and overexposure may result in adverse health effects. Additionally, the chemical form of the ingested selenium contributes crucially to its health effects. While small Se species play a major role in Se metabolism, their toxicological effects, bioavailability and metabolic transformations following elevated uptake are poorly understood. Utilizing the tractable invertebrate Caenorhabditis elegans allowed for an alternative approach to study species-specific characteristics of organic and inorganic Se forms in vivo, revealing remarkable species-dependent differences in the toxicity and bioavailability of selenite, selenomethionine (SeMet) and Se-methylselenocysteine (MeSeCys)...
May 17, 2018: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29770376/field-studies-reveal-functions-of-chemical-mediators-in-plant-interactions
#15
REVIEW
Meredith C Schuman, Ian T Baldwin
Plants are at the trophic base of most ecosystems, embedded in a rich network of ecological interactions in which they evolved. While their limited range and speed of motion precludes animal-typical behavior, plants are accomplished chemists, producing thousands of specialized metabolites which may function to convey information, or even to manipulate the physiology of other organisms. Plants' complex interactions and their underlying mechanisms are typically dissected within the controlled environments of growth chambers and glasshouses, but doing so introduces conditions alien to plants evolved in natural environments, such as being pot-bound, and receiving artificial light with a spectrum very different from sunlight...
May 17, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/29769077/magnetic-field-distribution-modulation-of-intrathecal-delivered-ketorolac-iron-oxide-nanoparticle-conjugates-produce-excellent-analgesia-for-chronic-inflammatory-pain
#16
Ping-Ching Wu, Dar-Bin Shieh, Hung-Tsung Hsiao, Jeffery Chi-Fei Wang, Ya-Chi Lin, Yen-Chin Liu
BACKGROUND: Nanoparticles have become one of the most promising among the potential materials used for biomedical applications. However, few researchers have focused on their effects on analgesia. Despite the fact that various nanoparticles have been evaluated for drug delivery and MRI imaging contrast enhancement in clinical settings, no reports have investigated the in vivo synergy of ketorolac iron-oxide nanoparticle conjugates to improve the analgesic effect. METHODS: Ketorolac conjugated magnetic iron oxide nanoparticles (Keto-SPIO) were synthesized via two-stage additions of protective agents and chemical co-precipitation...
May 16, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29768446/inhibitory-effect-of-k-ions-and-influence-of-other-ions-and-osmolality-on-the-spermatozoa-motility-of-european-burbot-lota-lota-l
#17
Katarzyna Dziewulska, Malwina Pilarska
BACKGROUND: In fish with external fertilization, two main start-up mechanisms of the path that blocks or activates the spermatozoan motility apparatus are known. The main factor managing the path is osmolality or potassium ion. In burbot from the European and North American population, contradictory findings regarding the factors influencing the onset of spermatozoa motility were reported. The objective of the current study was to determine the effect of potassium and osmolality on the spermatozoa activation of European burbot, Lota lota (Actinopterygii, Gadiformes, Lotidae)...
2018: PloS One
https://www.readbyqxmd.com/read/29768398/urinary-metabolites-of-volatile-organic-compounds-of-infants-in-the-neonatal-intensive-care-unit
#18
Dina El-Metwally, Krista Chain, Matthew P Stefanak, Udeni Alwis, Benjamin C Blount, Judy S LaKind, Cynthia F Bearer
BackgroundPreterm infants (PTI) in the NICU are often placed in incubators that may increase their exposure to volatile organic chemicals (VOCs). To determine whether PTI in incubators have higher urinary concentrations of VOC metabolites compared with infants in cribs.MethodsUrine from 40 PTI in incubators and 40 infants in cribs was collected and analyzed for 28 urinary VOC biomarkers. Differences in metabolite concentrations between the two groups were compared.ResultsTwenty two of the VOC metabolites were detected in at least one urine sample...
May 16, 2018: Pediatric Research
https://www.readbyqxmd.com/read/29768226/comparison-of-the-effects-of-three-kinds-of-igys-normal-nanoliposomal-and-nanoparticle-conjugated-which-are-produced-against-the-small-domains-of-dr5-protein-on-cancer-cells
#19
Shaghaegh Amirijavid, Maliheh Entezari
Cancer treatment with several kinds of drugs, especially targets the apoptotic pathways nowadays. TNF-related apoptosis-inducing ligand (TRAIL) as one of the important members of death receptors, significantly trigger induction of apoptosis in cancer cells. Three conserved domains of Death receptor (DR5) protein extracellular domain, which are fortified cysteine, were chosen and chemically synthesised. Hens were immunised with nano-liposomal peptides, and as a result the purified Immunoglobulin (IgYs) remarkably killed the cancerous MCF7 cells...
June 2018: IET Nanobiotechnology
https://www.readbyqxmd.com/read/29768220/metallic-nanoparticle-synthesised-by-biological-route-safer-candidate-for-diverse-applications
#20
REVIEW
Lata Ramrakhiani, Sourja Ghosh
Biological synthesis of nanoparticles (NPs) involves greater prospect; however, a detailed review is required for ecofriendly, faster and stable NP formulation in large scale for different commercial applications. The present article highlighted recent updates on biological route of single and bimetallic NP synthesis wherein the chemical reducing agents are eliminated and biological entities are utilised to convert metal ions to NPs. Application of the biological reducing agents ranging from bacteria to fungi and even natural plant extracts have emerged as eco-friendly and cost-effective routes for the synthesis of metal nanomaterials...
June 2018: IET Nanobiotechnology
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