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https://www.readbyqxmd.com/read/28938196/sorption-of-uranium-vi-onto-hydrous-ferric-oxide-modified-zeolite-assessment-of-the-effect-of-ph-contact-time-temperature-selected-cations-and-anions-on-sorbent-interactions
#1
Pfano Mathews Nekhunguni, Nikita Tawanda Tavengwa, Hlanganani Tutu
Zeolites are commonly used as adsorbents for metal removal in most applications e.g. in wastewater. However, the ubiquity of iron in such systems may, in the long-term, distort the true interactions and mechanisms of contaminant removal as a result of modification of the zeolite surface. In this study, this potential phenomenon was assessed for the removal of uranium(VI) from aqueous solution by hydrous ferric oxide-modified zeolite (HFOMZ). This was prepared by precipitating iron hydroxide (the common precipitate of iron in aqueous systems) onto zeolite...
September 19, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28936518/microscopic-time-resolved-imaging-of-singlet-oxygen-by-delayed-fluorescence-in-living-cells
#2
Marek Scholz, Roman Dědic, Jan Hála
Singlet oxygen is a highly reactive species which is involved in a number of processes, including photodynamic therapy of cancer. Its very weak near-infrared emission makes imaging of singlet oxygen in biological systems a long-term challenge. We address this challenge by introducing Singlet Oxygen Feedback Delayed Fluorescence (SOFDF) as a novel modality for semi-direct microscopic time-resolved wide-field imaging of singlet oxygen in biological systems. SOFDF has been investigated in individual fibroblast cells incubated with a well-known photosensitizer aluminium phthalocyanine tetrasulfonate...
September 22, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28934337/pyrene-conjugation-and-spectroscopic-analysis-of-hydroxypropyl-methylcellulose-compounds-successfully-demonstrated-a-local-dielectric-difference-associated-with-in-vivo-anti-prion-activity
#3
Kenta Teruya, Ayumi Oguma, Keiko Nishizawa, Hiroshi Kamitakahara, Katsumi Doh-Ura
Our previous study on prion-infected rodents revealed that hydroxypropyl methylcellulose compounds (HPMCs) with different molecular weights but similar composition and degree of substitution have different levels of long-lasting anti-prion activity. In this study, we searched these HPMCs for a parameter specifically associated with in vivo anti-prion activity by analyzing in vitro chemical properties and in vivo tissue distributions. Infrared spectroscopic and thermal analyses revealed no differences among HPMCs, whereas pyrene conjugation and spectroscopic analysis revealed that the fluorescence intensity ratio of peak III/peak I correlated with anti-prion activity...
2017: PloS One
https://www.readbyqxmd.com/read/28929158/ru-os-dyads-based-on-a-mixed-bipyridine-terpyridine-bridging-ligand-modulation-of-the-rate-of-energy-transfer-and-ph-induced-luminescence-switching-in-the-infrared-domain
#4
Manoranjan Bar, Dinesh Maity, Sourav Deb, Shyamal Das, Sujoy Baitalik
A series of heterobimetallic complexes of compositions [(bpy/phen)2Ru(dipy-Hbzim-tpy)Os (tpy-PhCH3/H2pbbzim)](4+) (bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline, tpy-PhCH3 = 4'-(4-methylphenyl)-2,2':6',2''-terpyridine and H2pbbzim = 2,6-bis(benzimidazole-2-yl)pyridine)), derived from a heteroditopic bpy-tpy bridging ligand, were synthesized and thoroughly characterized in this work. The heterometallic complexes exhibit two successive one-electron reversible metal-centered oxidations corresponding to Os(II)/Os(III) at lower potential and Ru(II)/Ru(III) at higher potential...
September 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28927594/synthesis-of-a-fluorescent-ethyl-cellulose-membrane-with-application-in-monitoring-1-naphthylacetic-acid-from-controlled-release-formula
#5
Long Pang, Zideng Gao, Haojie Feng, Shunyi Wang, Rongrong Ma, Bin Zhou, Shuwen Hu, Kemo Jin
A triple-functional (chemical release properties, physical release properties, and monitoring 1-naphthylacetic acid (NAA) release) ethyl cellulose (EC) membrane, modified with fluorescein 1-naphthylacetic acid ester (FNE) and isophorone diisocyanate (IPDI), was prepared (designated as IECF membrane). Fourier transform infrared analysis was conducted to confirm the grafting of FNE to the EC backbone. The chemical and physical release properties of IECF membrane were investigated. The chemical release traits of NAA were related to the hydrolysis of FNE of IECF membrane which was influenced by the NAA concentration at pH 7...
November 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28926230/formation-and-characterization-of-hydrogen-boride-sheets-derived-from-mgb2-by-cation-exchange
#6
Hiroaki Nishino, Takeshi Fujita, Nguyen Thanh Cuong, Satoshi Tominaka, Masahiro Miyauchi, Soshi Iimura, Akihiko Hirata, Naoto Umezawa, Susumu Okada, Eiji Nishibori, Asahi Fujino, Tomohiro Fujimori, Shin-Ichi Ito, Junji Nakamura, Hideo Hosono, Takahiro Kondo
Two-dimensional (2D) materials are promising for applications in a wide range of fields because of their unique properties. Hydrogen boride sheets, a new 2D material recently predicted from theory, exhibit intriguing electronic and mechanical properties as well as hydrogen storage capacity. Here, we report the experimental realization of 2D hydrogen boride sheets with an empirical formula of H1B1, produced by exfoliation and complete ion-exchange between protons and magnesium cations in magnesium diboride (MgB2) with an average yield of 42...
September 19, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28925890/the-use-of-hemodynamic-and-cerebral-monitoring-to-study-pharmacodynamics-in-neonates
#7
A Smits, L Thewissen, A Dereymaeker, E Dempsey, A Caicedo, Gunnar Naulaers
BACKGROUND: Drugs acting on the cardiovascular and central nervous system often display relatively fast clinical responses, which may differ in neonates compared to children and adults. Introduction of bedside monitoring tools might be of additional value in the pharmacodynamic (PD) assessment of such drugs in neonates. METHODS: We aim to provide an overview of the frequently used monitoring tools to assess drug effects on the hemodynamic status as well as the cerebral circulation, oxygenation and cerebral metabolism in neonates...
September 18, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28925151/-construction-of-nirs-based-total-quality-control-system-for-compound-ejiao-oral-liquid-and-relative-thinking
#8
Yan Zhang, Lu Zhang, Shou-Sheng Tian, Xiang-Shan Zhou, Wen-Long Li, Hai-Bin Qu
In this paper, near infrared spectroscopy (NIRS)-based total quality control system of compound Ejiao oral liquid is introduced briefly, including the quality control of raw traditional Chinese medicine (TCM) materials, monitoring and control of the extract and the alkaline precipitation technics, and also the inspection of finished products in both open bottle and non-opening modes. By analyzing and summing up the significance and difficulties, several important problems in the practical applications of NIRS technology are proposed, which will provide references for the similar studies of other TCM products...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28925144/-induction-and-analysis-for-nir-features-of-frequently-used-mineral-traditional-chinese-medicines
#9
Long Chen, Ming-Yang Yuan, Ke-Li Chen
In order to provide theoretical basis for the rapid identification of mineral traditional Chinese medicines(TCM) with near infrared (NIR)diffuse reflectance spectroscopy, Characteristic NIR spectra of 51 kinds of mineral TCMs were generalized and compared on the basis of the previous research, and the characteristic spectral bands were determined and analyzed by referring to mineralogical and geological literatures. It turned out that the NIR features of mineral TCMs were mainly at 8 000-4 000 cm ⁻¹ wavebands, which can be assigned as the absorption of water, -OH and[CO3 ²⁻] and so on...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28925142/-research-progress-on-method-validation-of-near-infrared-spectroscopy-in-quantitative-analysis
#10
Yu Luo, Wen-Long Li, Hai-Bin Qu
Due to the advantages of fast and noninvasive, requiring almost no sample preparation, supplying chemical and physical information, near infrared (NIR) spectroscopy is widely used in the pharmaceutical industry. In the life cycle of an established analytical method, rigorous validation should be performed before routine use. However,there is no detailed experimental standards or decision rules for the NIR methods validation currently, and various approaches were applied to validate the established NIR quantification models in literatures...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28925141/-research-progress-on-standardization-study-of-nir-spectroscopy-based-method-for-quality-control-of-traditional-chinese-medicine
#11
Wen-Long Li, Hai-Bin Qu
In recent years, the near infrared (NIR) spectroscopy has gained wide acceptance within the quantitative analysis of traditional Chinese medicine (TCM). However, the lack of technical standards is the bottleneck problem in this process. To address this issue, standardization study of the NIR spectroscopy based method for the quantitative analysis of TCM is needed, in which the specific characteristics of TCM should be given full considerations. The main research contents include:the scope definition for the application of NIR spectroscopy in the TCM quantitative analysis field, the selection criteria for the sample pretreatment and spectral acquisition conditions, the rules for the model optimization and evaluation, and the regulations for the model update and transfer...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28925140/-near-infrared-spectroscopy-based-process-trajectory-technology-and-its-application-in-monitoring-and-controlling-of-traditional-chinese-medicine-manufacturing-process
#12
Wen-Long Li, Hai-Bin Qu
In this paper, the principle of NIRS (near infrared spectroscopy)-based process trajectory technology was introduced.The main steps of the technique include:① in-line collection of the processes spectra of different technics; ② unfolding of the 3-D process spectra;③ determination of the process trajectories and their normal limits;④ monitoring of the new batches with the established MSPC (multivariate statistical process control) models.Applications of the technology in the chemical and biological medicines were reviewed briefly...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28919470/preparation-and-characterization-of-amorphous-ciprofloxacin-amino-acid-salts
#13
Hanah Mesallati, Daryl Conroy, Sarah Hudson, Lidia Tajber
The amorphization of the poorly soluble drug ciprofloxacin (CIP) may be facilitated by the use of a suitable stabilizer. In this study seven amino acids, with various side chain properties, were evaluated in this regard. Solid dispersions were prepared by ball milling 1:1 molar ratios of CIP with the amino acids, and their solid-state and pharmaceutical properties were then examined. Fully X-ray amorphous solid dispersions were obtained with aspartic acid, glutamic acid, cysteine and arginine. In each case, evidence of salt formation between the drug and amino acids was found via Fourier transform infrared spectroscopy and solid-state nuclear magnetic resonance...
September 14, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28917737/3-4-diaminotoluene-sensor-development-based-on-hydrothermally-prepared-mncoxoy-nanoparticles
#14
Mohammed M Rahman, M M Alam, Abdullah M Asiri, M A Islam
A facile hydrothermal process was used to prepare MnCoxOy nanoparticles (NPs) in alkaline medium (pH~10.5) at room temperature. The NPs were characterized by Fourier-transform infrared spectroscopy (FTIR), ultraviolet visible spectroscopy (UV/vis), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), and powder X-ray diffraction (XRD). A thin layer of NPs film as a chemical sensor was fabricated on a glassy carbon electrode (GCE) with the help of a conducting binder...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28915485/long-acting-and-broad-spectrum-antimicrobial-electrospun-poly-%C3%AE%C2%B5-caprolactone-gelatin-micro-nanofibers-for-wound-dressing
#15
Rui Shi, Huan Geng, Min Gong, Jingjing Ye, Chengai Wu, Xiaohua Hu, Liqun Zhang
Trimethoxysilylpropyl octadecyldimethyl ammonium chloride (QAS), which forms facile bonds with hydroxyl groups, acts asa cationic antibacterial agent. In this work, QAS was introduced into a polycaprolactone (PCL)/gelatin hybrid in increasing concentrations to fabricate a long-acting and broad-spectrum antimicrobial micro/nanofiber membrane as a novel wound dressing. The physical interactions and chemical bonding between QAS/PCL and QAS/gelatin were demonstrated by infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS...
September 1, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28914930/continuous-wave-singly-resonant-parametric-oscillator-based-mid-infrared-optical-vortex-source
#16
A Aadhi, Varun Sharma, R P Singh, G K Samanta
We report on a high-power, continuous-wave source of optical vortices tunable in the mid-infrared (mid-IR) wavelength range. Using the orbital angular momentum (OAM) conservation of the parametric processes and the threshold conditions of the cavity modes of the singly resonant optical parametric oscillator (SRO), we have transferred the OAM of the pump beam at the near-infrared wavelength to the idler beam tunable in the mid-IR. Pumped with a vortex beam of order lp=1 at 1064 nm, the SRO, configured in a four curved mirror-based ring cavity with a 50 mm long MgO-doped periodically poled LiNbO3 crystal, produces an idler beam with an output power in excess of 2 W in a vortex spatial profile with the order li=1, tunable across 2217-3574 nm and corresponding signal beam in Gaussian intensity distribution across 1515-2046 nm...
September 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28914915/long-wavelength-infrared-solitons-in-air
#17
A A Voronin, A M Zheltikov
Dispersion and optical nonlinearity of atmospheric air in the long-wavelength infrared (LWIR) range are shown to enable unique soliton dynamics in freely propagating laser beams. Analysis of spatiotemporal LWIR waveform evolution in air reveals soliton self-compression scenarios whereby ultrashort LWIR subterawatt pulses can be compressed to single-cycle terawatt field waveforms.
September 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28906446/a-novel-low-power-consumption-all-fiber-optic-anemometer-with-simple-system-design
#18
Yang Zhang, Fang Wang, Zhihui Duan, Zexu Liu, Zigeng Liu, Zhenlin Wu, Yiying Gu, Changsen Sun, Wei Peng
A compact and low-power consuming fiber-optic anemometer based on single-walled carbon nanotubes (SWCNTs) coated tilted fiber Bragg grating (TFBG) is presented. TFBG as a near infrared in-fiber sensing element is able to excite a number of cladding modes and radiation modes in the fiber and effectively couple light in the core to interact with the fiber surrounding mediums. It is an ideal in-fiber device used in a fiber hot-wire anemometer (HWA) as both coupling and sensing elements to simplify the sensing head structure...
September 14, 2017: Sensors
https://www.readbyqxmd.com/read/28905964/development-and-applications-of-a-near-infrared-dye-benzylguanine-conjugate-to-specifically-label-snap-tagged-proteins
#19
Xinbo Song, Hui Bian, Chao Wang, Mingyu Hu, Ning Li, Yi Xiao
Near-infrared (NIR) fluorescent probes are advantageous over visible ones, for they can avoid the interference from the short-wavelength background emission in biological systems. However, there are a very limited number of NIR probes that can specifically label target proteins in living cells. In this work, a series of long-wavelength dyes (N-NIR, S-NIR, and K-NIR) analogous to the novel Changsha NIR family are synthesized conveniently through a new approach that is different from the previously reported one...
September 14, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28895235/infrared-assisted-extraction-and-hplc-analysis-of-prunus-armeniaca-l-pomace-and-detoxified-kernel-and-their-antidiabetic-effects
#20
Karim Raafat, Nada El-Darra, Fatima A Saleh, Hiba N Rajha, Richard G Maroun, Nicolas Louka
INTRODUCTION: Prunus armeniaca L. (P. armeniaca) is one of the medicinal plants with a high safety-profile. OBJECTIVES: The aim of this work was to make an infrared-assisted extraction (IR-AE) of P. armeniaca fruit (pomace) and kernel, and analyse them using reverse phase high-performance liquid chromatography (RP-HPLC) aided method. METHODS: IR-AE is a novel-technique aimed at increasing the extraction-efficiency. The antidiabetic-potentials of the P...
September 12, 2017: Phytochemical Analysis: PCA
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