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https://read.qxmd.com/read/30776590/chemometrics-coupled-with-uplc-ms-ms-for-simultaneous-analysis-of-markers-in-the-raw-and-processed-fructus-xanthii-and-application-to-optimization-of-processing-method-by-bbd-design
#1
Hai Jiang, Liu Yang, Xudong Xing, Meiling Yan, Xinyue Guo, Bingyou Yang, Qiu-Hong Wang, Hai-Xue Kuang
BACKGROUND: As a widely used toxic traditional herbal medicine, the quality of the Fructus Xanthii must be well controlled to ensure the clinical therapeutic efficacy and safety. AIMS: A rapid, and sensitive using ultra-high performance liquid chromatography to triple quadrupole tandem mass spectrometry (UPLC-MS/MS) in selected reaction monitoring (SRM) mode was developed and validated for simultaneous quantitation of determination active and toxic ingredients form processed by stir-frying and raw materials of Fructus Xanthii...
December 15, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://read.qxmd.com/read/30771938/a-ratiometric-fluorescent-sensor-with-dual-response-of-fe-3-cu-2-based-on-europium-post-modified-sulfone-metal-organic-frameworks-and-its-logical-application
#2
Yu Zhang, Bing Yan
In this work, a sulfone-functionalized metal organic frameworks (MOFs) (CAU-11) formulated as [Al(OH)(SDBA)]·0.25DMF (H2 SDBA = 4, 4'-sulfonyldibenzoic acid) has been successfully constructed under solvothermal conditions. Next, a europium ion post-functionalized compound (Eu3+ @CAU-11) with bright red fluorescence has been obtained by postsynthetic modification (PSM). Because of its excellent luminescence and robust framework, we design this compound as a ratiometric fluorescent probe (IL /IEu ) for sensing application...
May 15, 2019: Talanta
https://read.qxmd.com/read/30771673/economic-leverage-affords-post-combustion-capture-of-43-of-carbon-emissions-supersonic-separators-for-methanol-hydrate-inhibitor-recovery-from-raw-natural-gas-and-co-2-drying
#3
Alexandre Mendonça Teixeira, Lara de Oliveira Arinelli, José Luiz de Medeiros, Ofélia de Queiroz F Araújo
Offshore oil/gas productions are power intensive and CO2 emitters from gas-fired power generation. This work investigates supersonic separator as a strategy for affording post-combustion capture backed up by cost reductions. Conventional offshore gas processing usually loses thermodynamic hydrate inhibitor methanol in processing and exported gas. This work analyses a supersonic separator variant gas processing simultaneously reducing methanol losses. Such process dramatically improves gas-plant profitability via cost-reduction of methanol make-up and power-consumption, simultaneously increasing revenues from liquefied-petroleum-gas by-product...
February 13, 2019: Journal of Environmental Management
https://read.qxmd.com/read/30770480/a-tale-of-two-sterilizers
#4
James P Agalloco
Steam sterilization is widely used across the healthcare industry, and among the most documented and standardized. Despite its broad application, there is considerable confusion regarding the different process control consideration and sterilizer designs necessary for its successful use. The methods and equipment used for porous (equipment, components and tools) loads are established to address air removal and steam penetration as these are critical to process efficacy. Sterilizing processes and equipment for non-porous loads (sealed aqueous containers) seek to minimize variations across the load, and minimizing over-processing...
February 15, 2019: PDA Journal of Pharmaceutical Science and Technology
https://read.qxmd.com/read/30767921/biosorption-potential-of-two-brown-seaweeds-in-the-removal-of-chromium
#5
Sibel Yalçın, Mustafa Özyürek
The present work focused on the potential use of brown algae Cystoseira barbata and Cystoseira crinita from the Black Sea coast for removal and speciation analyses of Cr(III,VI) ions from aqueous and wastewater solutions. The biosorption process of Cr(III) and Cr(VI) was designed as a function of pH and contact time. Potentiometric titration and Fourier transform infrared spectroscopy (FT-IR) analysis techniques revealed the potential binding sites present at the surface of the algae for both oxidation states of Cr...
December 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://read.qxmd.com/read/30767392/atomic-resolution-insight-on-sac7d-protein-binding-to-dna-and-associated-global-changes-by-molecular-dynamics-simulations
#6
Martin Zacharias
Sac7d is a small thermostable protein that induces large helical deformations in DNA upon association. Starting from multiple initial placements of the unbound Sac7d structure relative to a B-DNA oligonucleotide molecular dynamics (MD) simulations were employed to directly follow several successful binding events at atomic resolution that resulted in structures in close agreement with the native complex geometry. The final native complex formation occurred rapidly within tenth of nanoseconds and included simultaneous large scale kinking, groove opening, twisting and intercalation in the target DNA...
February 15, 2019: Angewandte Chemie
https://read.qxmd.com/read/30755391/a-green-and-facile-synthesis-for-rgo-ag-nanocomposites-using-one-step-chemical-co-reduction-route-at-ambient-temperature-and-combined-first-principles-theoretical-analyze
#7
L L Dong, Y C Ding, W T Huo, W Zhang, J W Lu, L H Jin, Y Q Zhao, G H Wu, Y S Zhang
Recently, graphene decorated with various inorganic nanoparticles, such as Pt, Au, Ag, TiO2 and Fe3 O4 , among which Ag nanocomposites are good candidates for electronics, optics, electrochemistry and catalysis. However, preparation techniques for Ag nanoparticles/carbon matrix hybrids require tedious multi-step processes often involving toxic reducing agents/high temperatures which is not viable for scalable production. Here, a facile, one step and eco-friendly chemical co-reduction route was utilized to synthesis of a new nanocomposites by Ag nanoparticle anchored on reduced graphene oxide (rGO) at ambient temperature and combined first principles theoretical analyze their interfacial adsorption behavior, is reported...
January 4, 2019: Ultrasonics Sonochemistry
https://read.qxmd.com/read/30743985/simultaneous-determination-of-thirteen-q-markers-in-raw-and-processed-tussilago-farfara-l-by-uplc-qqq-ms-ms-coupled-with-chemometrics
#8
Liu Yang, Hai Jiang, Ajiao Hou, Xinyue Guo, Wenjing Man, Meiling Yan, Xudong Xing, Bingyou Yang, Qiuhong Wang, Haixue Kuang
The purpose of this study was to establish a rapid, reliable, and sensitive ultra-performance liquid chromatography with triple-quadrupole tandem mass spectrometry coupled with chemometric method to measure and evaluate the differences between thirteen compounds in raw and processed Tussilago farfara L. from different sources. This assay method was validated, and the results indicated that the calibration curves for the thirteen compounds had good linearity (R² > 0.9990). The limits of detection and limits of quantification of the thirteen compounds ranged from 0...
February 8, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/30742006/in-situ-synthesized-and-pattern-ag-bi-2-se-3-composite-structure-by-ldw-and-photothermal-conversion
#9
Zejia Zhao, Guozhi Jia, Yanling Liu, Qiurui Zhang, Yaoyao Zhou
Bi2 Se3 nanofilm has exhibited many promising potentials application in the field of photo-to-heat conversion. A highly-efficient photo-to-heat conversion system of Ag/Bi2 Se3 composite nanofilm is successfully fabricated through laser direct writing (LDW) technique. The localized heat induced by laser simultaneously achieve Ag particles synthesis, transfer and patterning in a single processing step. The thermal reaction process includes the forming of nanoparticles based on the process of the thermal reduction, laser ablation, sputtering deposition and so on...
February 11, 2019: Scientific Reports
https://read.qxmd.com/read/30740973/ebola-virus-aptamers-from-highly-efficient-selection-to-application-on-magnetism-controlled-chips
#10
Shao-Li Hong, Meng-Qi Xiang, Man Tang, Dai-Wen Pang, Zhi-Ling Zhang
Aptamers of Ebola virus (EBOV) offer a powerful means for the prevention and diagnostics. Unfortunately, few of aptamers for EBOV are discovered yet. Herein, assisted by magnetism-controlled selection chip to strictly manipulate selection conditions, a highly efficient aptamer selection platform for EBOV is proposed. With the high-stringency selection conditions of rigorous washing, minuscule amount of magnetic beads manipulating and real-time evaluation of the selection effectiveness, the selection performance of platform was improved significantly...
February 11, 2019: Analytical Chemistry
https://read.qxmd.com/read/30735025/colorimetric-sensor-array-for-antioxidant-discrimination-based-on-the-inhibition-of-oxidation-reaction-between-3-3-5-5-tetramethylbenzidine-and-hydrogen-peroxide
#11
Xin Li, Caiyun Kong, Zhengbo Chen
The discrimination of antioxidants is of great significance due to their essential roles in various biological processes and many diseases. Compared with the traditional lock-key sensing mode for single target detection at a time, sensor arrays can discriminate various antioxidants simultaneously. Nanomaterial-based sensor arrays have shown great promise for antioxidant discrimination, however, as far as I know none of them have been reported for discriminating antioxidants based on catalytic reaction of intrinsic peroxidase-like activity of two-dimensional nanomaterials...
February 8, 2019: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/30724188/co-localization-of-glucose-oxidase-and-catalase-enabled-by-a-self-assembly-approach-matching-between-molecular-dimensions-and-hierarchical-pore-sizes
#12
Wei Zhuang, Jinsha Huang, Xiaojing Liu, Lei Ge, Huanqing Niu, Zhenfu Wang, Jinglan Wu, Pengpeng Yang, Yong Chen, Hanjie Ying
To achieve efficient one-step production of gluconic acid, cascade reactions of glucose oxidase (GOD) and catalase (CAT) have been advocated in the biocatalysis system. In this work, the methodology of co-immobilization of GOD and CAT was investigated in details for obtaining improved enzyme loading and activity. The maximum adsorption capability of GOD and CAT was 24.18 and 14.33 mg·g-1 , respectively. The matching between dimensions of enzymes and hierarchical pore sizes of carriers are critical to the success of immobilization process...
March 1, 2019: Food Chemistry
https://read.qxmd.com/read/30721895/improved-photo-and-chemical-responses-of-graphene-via-porphyrin-functionalization-for-flexible-transparent-and-sensitive-sensors
#13
Soonjae Pyo, Jungwook Choi, Jongbaeg Kim
The functionalization of graphene with organic molecules is beneficial for the realization of high-performance graphene sensors because functionalization can provide enhanced functionalities beyond the properties of pristine graphene. Although various types of sensors based on organic-graphene hybrids have been developed, the functionalization processes have poor thickness-controllability/reliability or require post-processing, and sensor applications rely on conventional, rigid substrates such as SiO2/Si. Here, a flexible and transparent metalloporphyrin (MPP)-graphene hybrid for sensitive UV detection and chemical sensing is demonstrated...
February 5, 2019: Nanotechnology
https://read.qxmd.com/read/30720368/pheromone-induced-accuracy-of-nestmate-recognition-in-carpenter-ants-simultaneous-decrease-in-type-i-and-type-ii-errors
#14
Natacha Rossi, David Baracchi, Martin Giurfa, Patrizia d'Ettorre
The ecological and evolutionary success of social insects relies on their ability to efficiently discriminate between group members and aliens. Nestmate recognition occurs by phenotype matching, the comparison of the referent (colony) phenotype to the one of an encountered individual. Based on the level of dissimilarity between the two, the discriminator accepts or rejects the target. The tolerated degree of mismatch is predicted by the acceptance threshold model, which assumes adaptive threshold shifts depending on the costs of discrimination errors...
February 2019: American Naturalist
https://read.qxmd.com/read/30714920/content-aware-convolutional-neural-network-for-in-loop-filtering-in-high-efficiency-video-coding
#15
Chuanmin Jia, Shiqi Wang, Xinfeng Zhang, Shanshe Wang, Jiaying Liu, Shiliang Pu, Siwei Ma
Recently, convolutional neural network (CNN) has attracted tremendous attention and achieved great success in many image processing tasks. In this paper, we focus on CNN technology joining with image restoration to facilitate video coding performance, and propose the content-aware CNN based in-loop filtering for High Efficiency Video Coding (HEVC). In particular, we quantitatively analyze the structure of the proposed CNN model from multiple dimensions to make the model interpretable and optimal for CNN based loop filtering...
January 31, 2019: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://read.qxmd.com/read/30714253/3-dimensional-visualization-of-implant-tissue-interface-with-the-polyethylene-glycol-associated-solvent-system-tissue-clearing-method
#16
Yating Yi, Yi Men, Dian Jing, Wenjing Luo, Shiwen Zhang, Jian Q Feng, Jin Liu, Woo-Ping Ge, Jun Wang, Hu Zhao
OBJECTIVES: Dental implants are major treatment options for restoring teeth loss. Biological processes at the implant-tissue interface are critical for implant osseointegration. Superior mechanical properties of the implant constitute a major challenge for traditional histological techniques. It is imperative to develop new technique to investigate the implant-tissue interface. MATERIALS AND METHODS: Our laboratory developed the polyethylene glycol (PEG)-associated solvent system (PEGASOS) tissue clearing method...
February 3, 2019: Cell Proliferation
https://read.qxmd.com/read/30713745/the-neotree-application-developing-an-integrated-mhealth-solution-to-improve-quality-of-newborn-care-and-survival-in-a-district-hospital-in-malawi
#17
Caroline Crehan, Erin Kesler, Bejoy Nambiar, Queen Dube, Norman Lufesi, Matteo Giaccone, Charles Normand, Kishwar Azad, Michelle Heys
More than two-thirds of newborn lives could be saved worldwide if evidence-based interventions were successfully implemented. We developed the NeoTree application to improve quality of newborn care in resource-poor countries. The NeoTree is a fully integrated digital health intervention that combines immediate data capture, entered by healthcare workers (HCW) on admission, while simultaneously providing them with evidence-based clinical decision support and newborn care education. We conducted a mixed-methods intervention development study, codeveloping and testing the NeoTree prototype with HCWs in a district hospital in Malawi...
2019: BMJ Global Health
https://read.qxmd.com/read/30710677/eeg-microstates-distinguish-between-cognitive-components-of-fluid-reasoning
#18
Filippo Zappasodi, Mauro Gianni Perrucci, Aristide Saggino, Pierpaolo Croce, Pasqua Mercuri, Roberta Romanelli, Roberto Colom, Sjoerd J H Ebisch
Fluid reasoning is considered central to general intelligence. How its psychometric structure relates to brain function remains poorly understood. For instance, what is the dynamic composition of ability-specific processes underlying fluid reasoning? We investigated whether distinct fluid reasoning abilities could be differentiated by electroencephalography (EEG) microstate profiles. EEG microstates specifically capture rapidly altering activity of distributed cortical networks with a high temporal resolution as scalp potential topographies that dynamically vary over time in an organized manner...
January 30, 2019: NeuroImage
https://read.qxmd.com/read/30708343/nano-cual-2-o-4-spinel-mineral-as-a-novel-antibacterial-agent-for-pvdf-membrane-modification-with-minimized-copper-leachability
#19
Ziyi Wang, Yuanyuan Tang, Tao Wang, Kun Liang
The employment of copper-containing antibacterial agents for membrane modification can constrain undesirable bacterial adhesion and growth in an effective and economical way. However, copper ion may be leached out and cause further toxicity after applying those materials for membrane processes. Therefore, in this study, nano CuAl2 O4 spinel was synthesized as a novel copper-containing material which was expected to have good antibacterial activity and simultaneously stabilize copper ions by its intrinsic structure...
January 25, 2019: Journal of Hazardous Materials
https://read.qxmd.com/read/30707545/intracellular-dynamic-disentangling-of-doxorubicin-release-from-luminescent-nanogold-carriers-by-fluorescence-lifetime-imaging-microscopy-flim-under-two-photon-excitation
#20
Sorina Suarasan, Ana-Maria Craciun, Emilia Licarete, Monica Focsan, Klara Magyari, Simion Astilean
There is still a lack of available technique to follow noninvasively the intracellular processes as well to track or disentangle various signals from the therapeutic agents at the site of action in the target cells. We present here the assessment of the intracellular kinetic of Doxorubicin (DOX) and gold nanoparticles carriers (AuNPs) by mapping simultaneously fluorescence and photoluminescence signals by Fluorescence Lifetime Imaging Microscopy under two-photon excitation (TPE-FLIM). The new nano-chemotherapeutic system AuNPs@gelatin-hyd-DOX has been fabricated by DOX loading onto the surface of gelatin biosynthesized AuNPs (AuNPs@gelatin) through a pH-sensitive hydrazone bond...
February 1, 2019: ACS Applied Materials & Interfaces
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