keyword
MENU ▼
Read by QxMD icon Read
search

FT

keyword
https://www.readbyqxmd.com/read/28647572/adsorption-of-solophenyl-red-3bl-polyazo-dye-onto-amine-functionalized-mesoporous-carbons
#1
Joanna Goscianska, Nady A Fathy, Reham M M Aboelenin
Mesoporous carbon of cubic structure was functionalized with ethylamine, ethylenediamine, diethylenetriamine and triethylenetetramine at 40°C for 8h. The mesostructure and textural parameters of the new materials were determined by X-ray diffraction and low-temperature nitrogen sorption techniques. The functional groups present on the surface of the samples were identified by FT-IR and thermogravimetric studies. Functionalization of the mesoporous carbon led to reduction of the surface area and pore volume as well as to an increase in the mean pore diameter...
June 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28647524/preparation-and-evaluation-of-bsa-based-hydrosol-nanoparticles-cross-linked-with-genipin-for-oral-administration-of-poorly-water-soluble-curcumin
#2
Narges Shahgholian, Ghadir Rajabzadeh, Bizhan Malaekeh-Nikouei
One of the most interesting functions of albumin is the ability to interact with bioactive compounds. This study describes preparation of protein-based nanoparticles (NPs) for the preparation of solid dispersion of curcumin (CN). Fabrication of hydrosol system of dispersed CN in bovine serum albumin (BSA) was approached, followed by cross-linking with glutaraldehyde (Gta). Response surface methodology (RSM) was used to investigate the influence of input factors (pH, CN content and organic phase ratio (r)), on the particle size and CN entrapment efficiency (EE)...
June 21, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28647266/synthesis-of-a-novel-illite-carbon-nanocomposite-adsorbent-for-removal-of-cr-vi-from-wastewater
#3
Gaofeng Wang, Shan Wang, Wen Sun, Zhiming Sun, Shuilin Zheng
A novel illite@carbon (I@C) nanocomposite adsorbent has been synthesized via a facile hydrothermal carbonization process (HTC) using glucose as carbonaceous source and illite as the carrier. The morphology, microstructure and surface properties of the prepared nanocomposite adsorbent were analyzed by FESEM, TGA, XRD, FT-IR and Zeta potential measurements. Batch experiments were carried out on the adsorption of Cr(VI) to determine the adsorption properties of the composite. The adsorption of Cr(VI) onto the I@C nanocomposite was well described by the pseudo-second-order kinetic model and Langmuir isotherm...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647251/pet-modified-red-mud-as-catalysts-for-oxidative-desulfurization-reactions
#4
Nayara T do Prado, Ana P Heitmann, Herman S Mansur, Alexandra A Mansur, Luiz C A Oliveira, Cinthia S de Castro
This work describes the synthesis of catalysts based on red mud/polyethylene terephthalate (PET) composites and their subsequent heat treatment under N2 atmosphere. The materials were characterized by scanning electron microscopy (SEM), temperature programmed reduction (TPR), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric (TG) analysis and N2 adsorption/desorption. The catalysts were evaluated in the oxidative desulfurization reaction of dibenzothiophene (DBT) in a biphasic system...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647242/effect-of-oxide-nanoparticles-on-the-morphology-and-fluidity-of-phospholipid-membranes-and-the-role-of-hydrogen-bonds
#5
Xiaoran Wei, Junchao Yu, Lei Ding, Jingtian Hu, Wei Jiang
Engineered oxide nanoparticles (NPs) are widely applied in insulators, catalyzers, paints, cosmetic products, textiles and semiconductors. Their attachment on cell membrane may lead to cytotoxicity. The effects of Al2O3, Fe2O3, SiO2, TiO2 and ZnO NPs on membrane integrity and fluidity were studied using giant or small unilamellar vesicles in this study. Al2O3 and SiO2 NPs disrupted the oppositely charged membrane, indicating the important role of electrostatic attraction. However, Fe2O3, TiO2 and ZnO NPs did not cause serious membrane disruption as Al2O3 and SiO2 NPs...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28646756/protein-functionalization-of-zno-nanostructure-exhibits-selective-and-enhanced-toxicity-to-breast-cancer-cells-through-oxidative-stress-based-cell-death-mechanism
#6
Sailendra Mahanta, S Prathap, Deependra Kumar Ban, Subhankar Paul
Zinc oxide nanostructure (ZnONS) was chemically synthesized and functionalized (FZnONSBLA) with a small protein bovine α-lactalbumin (BLA) by chemical cross-linking methods. Both nano-structures were characterized using various techniques such as electron microscopy, dynamic light scattering (DLS), UV-Vis spectroscopy, FT-IR, photo-luminescence and X-ray diffraction. Electron microscopy and DLS analysis revealed their (ZnONS and FZnONSBLA) average size of 200nm and 450nm, respectively. When cytotoxicity of both the nanostructures were assessed in breast cancer cells MCF-7 and MDAMB231 by MTT assay and PI/Annexin V staining (FACS), FZnONSBLA demonstrated higher cell death than ZnONS primarily due to generation of intracellular reactive oxygen species (ROS)...
June 15, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28646658/investigation-and-structural-elucidation-of-a-new-impurity-in-bulk-drug-of-cilostazol-by-lc-ms-ms-ft-ir-and-nmr
#7
Zhaoxia Hu, Sanguo Gao, Jue Gao
A new impurity was detected in bulk cilostazol (CIL) crude during routine analysis. The impurity (∼4%, the specification for unknown impurity in crude is not more than 0.20%) has a relative retention time of 1.46. Based on MS, NMR and IR spectral data, the impurity was identified as 6,6'-bis(4-(1-cyclohexyl-1H-tetrazol-5-yl) butoxy)-3,3',4,4'-tetrahydro-[7,7'-biquinoline]-2,2'(1H,1'H)-dione(CIL-dimer). The precursor of CIL-dimer is an oxidative product of starting material 6-Hydroxy-3,4-dyhydro-1H-quinolin-2-one(6-HQ), CIL-dimer was formed in the following reaction with 5-(3-Chloro-propyl)-1-cyclohexyl-1H-tetrazol(CHCBT)...
June 15, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28646435/eco-friendly-synthesis-of-silver-nanoparticles-using-green-algae-caulerpa-serrulata-reaction-optimization-catalytic-and-antibacterial-activities
#8
Eman F Aboelfetoh, Rania A El-Shenody, Mohamed M Ghobara
Stable colloidal silver nanoparticles (AgNPs) were synthesized using Caulerpa serrulata (green marine algae) aqueous extract as an efficient reducing and stabilizing agent. This method is considered to be a sustainable alternate to the more complicated chemical procedures. To achieve the optimization synthesis of AgNPs, several effects such as extract concentration, contact time, pH values, and temperature were examined. The synthesized AgNPs were characterized by UV-Vis spectroscopy, FT-IR, XRD, and HR-TEM...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28645759/microplastics-in-the-sediments-of-terra-nova-bay-ross-sea-antarctica
#9
Cristina Munari, Vanessa Infantini, Marco Scoponi, Eugenio Rastelli, Cinzia Corinaldesi, Michele Mistri
This is the first survey to investigate the occurrence and extent of plastic contamination in sediments collected in Terra Nova Bay (Ross Sea, Antarctica). Plastic debris extracted from 31 samples of sediments were counted, weighted and identified by Fourier-transform infrared spectroscopy (FT-IR). All sediment samples contained plastics: a total of 1661 items of debris (3.14g) were recorded from the 31 samples of sediment. Plastic particles in the samples ranged from 0.3 to 22mm in length. Fibres were the most frequent type of small plastics debris detected...
June 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28645066/hydrothermal-co-carbonization-of-sewage-sludge-and-pinewood-sawdust-for-nutrient-rich-hydrochar-production-synergistic-effects-and-products-characterization
#10
Xiaojuan Zhang, Lei Zhang, Aimin Li
The aim of this study is to explore the synergistic effects of hydrothermal co-carbonization of sewage sludge and pinewood sawdust on hydrochar production. Firstly, the effects of mixing ratios on hydrothermal carbonization were investigated, and then, the hydrochar was characterized by diverse analytical techniques. The mass balance results indicated that a significant synergistic enhancement occurred in terms of the increased hydrochar yield, organic and carbon retentions. By combining sewage sludge and pinewood sawdust at the mass ratio of 1:1, 58...
June 20, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28644242/effects-of-participation-in-sports-programs-on-walking-ability-and-endurance-over-time-in-children-with-cerebral-palsy
#11
Sandy A Ross, Morgan Yount, Sara Ankarstad, Samantha Bock, Britta Orso, Kimberly Perry, Jennifer Miros, Janice E Brunstrom-Hernandez
OBJECTIVE: Children with cerebral palsy may benefit from maintaining a high level of physical fitness similar to typically developing children especially in terms of long-term physical performance, although in practice this is often difficult. The purpose of this study was to determine the effect of participation in sports programs on walking ability and endurance over time. DESIGN: A retrospective cohort study included participants with cerebral palsy, aged 6 to 20 yrs, who attended a summer sports program from 2004 to 2012...
June 21, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28643834/understanding-the-remarkable-luminescence-enhancement-via-sio2-coating-on-tio2-eu-3-nanofibers
#12
Meiqi Chang, Yanhua Song, Ye Sheng, Jie Chen, Haifeng Zou
TiO2:Eu(3+) nanofibers diameters can be tuned by changing the mixed solvent ratio are synthesized via the electrospinning technique. Concentration quenching phenomena and the relationship of the PL intensity ratio I((5)D0-(7)F2)/I((5)D0-(7)F1) with the Eu doping concentration are discussed. Notably, the luminescence intensity is enhanced by about 7.8 fold by coating SiO2 gel layer on the TiO2:Eu(3+) nanofibers, which is successfully performed via a sol-gel process followed by calcination. Furthermore, these fibers are characterized systematically via X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), Fourier transform infrared spectroscopy (FT-IR), and photoluminescence (PL) spectroscopy...
June 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28643382/synthesis-and-biological-evaluation-of-arginyl-diosgenin-conjugate-as-a-potential-bone-tissue-engineering-agent
#13
Ai-Mei Liao, Hana Jung, Ji Won Yu, Dong Hee Lee, Sang-Soo Park, Bangrong Cai, ChangJu Chun
Water-soluble arginyl-diosgenin (Arg-DG) conjugate was designed, synthesized, and evaluated for a biological activity. The Arg-DG conjugate was characterized using FT-IR, (1) H NMR, (13) C NMR, and HPLC-MS analyses, followed by a biological activity evaluation. Compared with DG, the Arg-DG conjugate showed a decreased cytotoxicity against L929 cells and an increased anti-proliferative activity against hepatocellular cells. The safety of the Arg-DG conjugate was confirmed using the highly sensitive Alamar Blue assay, which indicated that it increased the cellular metabolic activity at suitable concentrations...
June 23, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28643032/fall-from-heights-does-height-really-matter
#14
G Alizo, J D Sciarretta, S Gibson, K Muertos, A Romano, J Davis, A Pepe
INTRODUCTION: Fall from heights is high energy injuries and constitutes a fraction of all fall-related trauma evaluations while bearing an increase in morbidity and mortality. We hypothesize that despite advancements in trauma care, the overall survivability has not improved in this subset of trauma patients. METHODS: All adult trauma patients treated after sustaining a fall from heights during a 40-month period were retrospectively reviewed. Admission demographics, clinical data, fall height (ft), injury patterns, ISS, GCS, length of stay, and mortality were reviewed...
June 22, 2017: European Journal of Trauma and Emergency Surgery: Official Publication of the European Trauma Society
https://www.readbyqxmd.com/read/28642952/solventless-mechanochemical-preparation-of-novel-magnetic-bioconjugates
#15
Daily Rodriguez-Padrón, Alain R Puente-Santiago, Alina M Balu, Antonio A Romero, Rafael Luque
A solventless mechanochemical approach was employed to obtain a bioconjugate (BSA-DA-Fe2O3) based on bovine serum albumin (BSA) and dopamine (DA) coated iron oxide magnetic nanoparticles. UV-vis measurements of the obtained material showed a distinctive peak at 280 nm which, together with the presence of N on the surface of the nanomaterial (a band at 400 eV in the XPS spectrum) and zeta potential measurements, confirmed the successful immobilization of the protein. Additionally, the presence of two bands at 1652 and 1545 cm(-1) in the FT-IR spectra of both BSA and BSA-DA-Fe2O3 and steady-state fluorescence analysis validated that the protein preserved its native-like structure after the mechanochemical milling process...
June 23, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28641685/distortion-of-prospective-time-production-underwater
#16
Malcolm B Hobbs, Wendy Kneller
BACKGROUND: The few prior studies of time perception underwater have reached contradictory conclusions as to how, and if, time perception becomes distorted when submerged. The current paper expands upon this limited data by describing two studies of prospective time production in scuba divers. METHODS: Study 1 (N = 32) compared performance on a 30-s interval time production task in deep water (35 m-42 m/∼115-138 ft) with a shallow water control (3-12 m/∼10-39 ft)...
July 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28641682/health-effects-of-airline-cabin-environments-in-simulated-8-hour-flights
#17
(no author information available yet)
INTRODUCTION: Commercial air travel is usually without health incidents. However, there is a view that cabin environments may be detrimental to health, especially flights of 8 h or more. Concerns have been raised about deep vein thrombosis, upper respiratory tract infections, altitude sickness, and toxins from the engines. METHODS: Passenger cabin simulators were used to achieve a comparative observational study with 8-h flights at pressures equivalent to terrestrial altitudes of ground, 4000, 6000, and 8000 ft...
July 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28641678/cognitive-deterioration-in-moderate-and-severe-hypobaric-hypoxia-conditions
#18
Jeremy M A Beer, Barry S Shender, Daren Chauvin, Todd S Dart, Joseph Fischer
BACKGROUND: Hypoxia continues to present risks in military aviation. Hypoxia symptoms include sensory and cognitive effects; of these, it is important to identify which components of operator performance are most vulnerable to hypoxia-induced decline in order to determine which sensory modality is most effective for alerting an impaired aviator of an imminent hypoxic episode. METHODS: A study was performed in a hypobaric chamber to characterize deterioration of cognitive performance under moderate (MH) and severe (SH) hypoxia conditions, culminating in subjects' inability to perform tasks...
July 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28641673/renewable-modified-cellulose-bearing-chelating-schiff-base-for-adsorptive-removal-of-heavy-metal-ions-and-antibacterial-action
#19
R Saravanan, L Ravikumar
  A novel approach toward chemically modified cellulose bearing active chelating Schiff base with hydroxyl group (Cell-Hy) was synthesized. The modified cellulose was examined for its heavy metal ion uptake potential from aqueous solution. The chemical and structural features of the adsorbent were characterized by Fourier transform infrared spectroscopy (FT-IR), solid state 13C-NMR, Scanning Electron Microscopy (SEM), and energy dispersive analysis of X-ray (EDAX) observations. The experimental conditions and adsorption parameters, including pH, initial metal ion concentration, adsorbent dosage, temperature, and contact time were optimized for the removal of Cu(II) and Pb(II) ions...
July 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28640541/design-and-fabrication-of-dual-targeted-delivery-system-based-on-gemcitabine-conjugated-human-serum-albumin-nanoparticles
#20
Parisa Norouzi, Mohsen Amini, Fatemeh Mottaghitalab, Farnaz Sadat Mirzazadeh Tekie, Rassoul Dinarvand, Zahra Hadavand Mirzaie, Fatemeh Atyabi
Dual-targeted drug delivery system has established their reputation as potent vehicles for cancer chemotherapies. Herein, gemcitabine (Gem) was conjugated to human serum albumin (HSA) via dithiodipropionic anhydride (DTDPA) to fabricate Gem-HSA nanoparticles. It was hypothesized that this system can enhance the low stability of Gem and can improve its intracellular delivery. Furthermore, folate was applied as targeting agent on HSA nanoparticles for increasing the tumor selectivity of Gem. In order to evaluate the structural properties of synthesized products, (1) H NMR and FT-IR were performed...
June 22, 2017: Chemical Biology & Drug Design
keyword
keyword
103820
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"