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https://www.readbyqxmd.com/read/29318467/theoretical-and-experimental-studies-of-the-controlled-release-of-tetracycline-incorporated-into-bioactive-glasses
#1
Ângela L Andrade, Isabela A Militani, Katia J de Almeida, Jadson C Belchior, Sérgio C Dos Reis, Rosangela M F Costa E Silva, Rosana Z Domingues
Several authors have studied the release profile of drugs incorporated in different devices. However, to the best of our knowledge, although many studies have been done on the release of tetracycline, in these release devices, no study has investigated if the released compound is actually the tetracycline, or, instead, a degraded product. This approach is exploited here. In this work, we analyse the influence of two drying methods on the tetracycline delivery behaviour of synthesised glasses using the sol-gel process...
January 9, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29306156/co2-methanation-on-the-catalyst-of-ni-mcm-41-promoted-with-ceo2
#2
Xiaoliu Wang, Lingjun Zhu, Yincong Liu, Shurong Wang
CO2 as a raw feed combined with renewable hydrogen for the production of useful chemicals and alternative energy products is one of the solutions to environmental and energy problems. In this study, a series of Ni-xCeO2/MCM-41 catalysts with a nickel content of 20wt% were prepared through deposition precipitation method for CO2 methanation. Different characterization methods, including BET, XRD, TEM, SEM, H2-TPR and H2-TPD were applied to help explore the influence mechanism of CeO2 on Ni/MCM-41 in CO2 methanation...
January 3, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29278856/removal-of-low-concentration-ch3sh-with-regenerable-cu-doped-mesoporous-silica
#3
Shengpan Peng, Wenhui Li, Yuzhou Deng, Weiman Li, Xiang Ma, Yunfa Chen
Mercaptans are highly volatile compounds responsible for disagreeable odors and very low olfactory threshold, especially for CH3SH (0.4 ppvb). To the best knowledge of us, approach for controlling low-concentrated odors (i.e. 1-10 ppm) is scarcely reported. In this research, Cu-doped mesoporous silica was synthesized for removal of low-concentrated CH3SH. The as-prepared samples show considerably thermal and mechanical stability and could be thermal-regenerated. Copper loading ratio and humidity have significant impacts on eliminating odors...
December 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29275204/synthesis-characterization-and-study-of-sorption-parameters-of-multi-walled-carbon-nanotubes-chitosan-nanocomposite-for-the-removal-of-picric-acid-from-aqueous-solutions
#4
Roghayeh Khakpour, Hasan Tahermansouri
The modification of carboxylated multi-wall carbon nanotubes (MWCNT-COOH) with chitosan (Chi) has been investigated to prepare a nanocomposite material (MWCNT-Chi) for the removal of picric acid from aqueous solutions. Materials were characterized by FT-IR, TGA, DTG, FESEM, EDX, BET and zeta potential. Batch experiments such as solution pH, dosage of adsorbents, contact time, concentration of the picric acid and temperature were achieved to study sorption process. Kinetic studies were well described by pseudo-second-order kinetic model for both adsorbents...
December 21, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29249029/efficient-fluoride-removal-using-al-cu-oxide-nanoparticles-supported-on-steel-slag-industrial-waste-solid
#5
Alien Blanco-Flores, Nubia Arteaga-Larios, Víctor Pérez-García, José Martínez-Gutiérrez, María Ojeda-Escamilla, Israel Rodríguez-Torres
A SSW/Al-Cu formed from an industrial solid waste and Al-Cu Nps are utilized for the removal of fluoride from aqueous solutions. The SSW/Al-Cu was obtained by a chemical reduction method. The SSW/Al-Cu was characterized by TEM, SEM, FT-IR, XRD, BET, and pHzpc techniques. The Nps were formed as bimetallic oxides and deposited in the form of spheroidal particles forming agglomerations. The sizes of these particles range from 1 to 3 nm. The surface area and average pore width of SSW/Al-Cu were 2.99 m2/g and 17...
December 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29247138/bet-2-nsais-and-chickenpox
#6
Karen Stone, Emma Tackley, Sandra Weir
A shortcut review was carried out to establish whether non-steroidal anti-inflammatory drugs (NSAIDs) is safe to prescribe in patients with chicken pox. 66 unique papers were found in CINAHL, Medline, Embase and Cochrane using the reported searches of which 6 presented the best evidence to answer the clinical question. The author, date and country of publication; patient group studied; study type; relevant outcomes; results and study weaknesses of these best papers are tabulated. It is concluded that, pending further research, it is advisable to avoid NSAID use in cases of primary varicella due to the potential increased risk of severe bacterial skin infections...
January 2018: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/29247136/bet-1-continuous-flow-insufflation-of-oxygen-in-out-of-hospital-cardiac-arrest
#7
Pierre-Alexandre LeBlanc, Alexandra Nadeau
A short cut review was carried out to establish whether continuous flow insufflation of oxygen (CFIO) is better than standard ventilation strategies at improving outcome in adults who have suffered an out-of-hospital cardiac arrest (OHCA). Papers were found in Medline and Embase using the reported searches of which four presented the best evidence to answer the clinical question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these best papers are tabulated...
January 2018: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/29210677/simultaneous-removal-of-nitrogen-and-phosphorus-by-cetylpyridinium-bromide-modified-zeolite
#8
Chengle Li, Jing Yao, Tian C Zhang, Wenya Xing, Ying Liang, Mingli Xiang
In this study, surfactant modified zeolite-clinoptilolite (SMZ) by CPB (cetylpyridinium bromide) was used for simultaneous removal of ammonium, nitrate and phosphate in synthetic wastewater, and the sorption properties of SMZ were determined and compared with natural zeolite. Results showed that natural clinoptilolite had good affinity for ammonium (8.940 mg/g), but not for nitrate (0.427 mg/g) and phosphate (0.801 mg/g). With the increase of surfactant loading from 5 g/L to 40 g/L, the sorption capacity for nitrate increased from 0...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29194922/material-properties-determining-the-insecticidal-activity-of-highly-divided-porous-materials-on-the-pharaoh-ant-monomorium-pharaonis
#9
Heleen Van Den Noortgate, Bert Lagrain, Sreeprasanth Pulinthanathu Sree, Stef Kerkhofs, Tom Wenseleers, Johan A Martens
BACKGROUND: Historically, inert insecticidal powders such as diatomaceous earth were researched for pest management applications, revealing that these types of powders killed insects by desiccation. However, data on the critical material properties that affect their efficacy is sparse. The present study investigates the insecticidal effect of powdered materials on the pharaoh ant, a notorious domestic pest. RESULTS: The insecticidal activity of 24 porous materials was tested...
December 1, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29170296/towards-evidence-based-emergency-medicine-best-bets-from-the-manchester-royal-infirmary
#10
Katherine Wylie
No abstract text is available yet for this article.
December 2017: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/29165473/large-cu-chalcogenone-cubic-cages-with-non-interacting-counter-ions
#11
Srinivas Katam, Prabusankar Ganesan
Two mega size copper(i) cubic cages, [{Cu(Bptp)1.5}8(PF6(-))](PF6(-))7 (1) and [{Cu(Bpsp)1.5}8(PF6(-))](PF6(-))7 (2), supported by imidazole-2-chalcogenone ligands (Bptp = 2,6-bis(1-isopropylimidazole-2-thione)pyridine and Bpsp = 2,6-bis(1-isopropylimidazole-2-selone)pyridine) have been synthesized and characterized. The formation of ionic salts 1 and 2 was confirmed by FT-IR, multinuclear ((1)H, (13)C, (31)P and (19)F) NMR, UV-vis, TGA, CHN analysis, BET analysis, single crystal X-ray diffraction and powder X-ray diffraction techniques...
November 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29137781/preparation-of-novel-ceo2-biochar-nanocomposite-for-sonocatalytic-degradation-of-a-textile-dye
#12
Alireza Khataee, Peyman Gholami, Dimitrios Kalderis, Eleni Pachatouridou, Michalis Konsolakis
The sonocatalytic performance of CeO2 nanoparticles synthesized by a hydrothermal method (CeO2-H) and CeO2@biochar (CeO2-H@BC) nanocomposite, were evaluated for the degradation of Reactive Red 84 (RR84) under ultrasonic irradiation. For comparison purposes the corresponding performance of bare biochar (BC) and commercial CeO2 (CeO2-C) samples were also assessed. A complementary characterization study, involving scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Transmission electron microscopy (TEM), dynamic light scattering (DLS), X-ray diffraction (XRD), N2 adsorption at -196°C (Brunauer-Emmett-Teller (BET) method) and Fourier transform infrared spectroscopy (FT-IR) was undertaken to gain insight into the structure-performance relationships...
March 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29098472/synthesis-and-co-oxidation-activity-of-1d-mixed-binary-oxide-ceo2-lao-x-supported-gold-catalysts
#13
Huanhuan Yu, Siyuan Zhong, Baolin Zhu, Weiping Huang, Shoumin Zhang
One-dimensional (1D) Ce-La nanorods with different La contents (Ce and La in the molar ratio of 1:0, 3:1, 1:1, 1:3, and 0:1) were synthesized by hydrothermal process. Au/Ce-La nanorod catalysts were obtained by a modified deposition-precipitation method. The samples were characterized by N2 adsorption-desorption (BET), ICP, X-ray diffraction (XRD), SEM, TEM, EDX, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), and temperature-programmed reduction (H2-TPR). It revealed that La existed as LaO x in the 1D nanorods...
November 2, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29061878/bet-2-should-children-with-sport-related-concussion-observe-strict-physical-rest-until-symptom-free
#14
Andrew C Kline
A short cut review was carried out to establish whether strict physical rest following sports related concussion in children is better than normal activity in reducing post-concussional symptoms. two recent systematic reviews presented the best evidence to answer the clinical question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these papers are tabulated. It is concluded that children who present with a sport-related concussion should have a brief period of cognitive and physical rest followed by a gradual increase in activity...
November 2017: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/29061876/bet-1-does-the-use-of-emollients-prevent-frostbite-to-the-face
#15
Emmy De Buck
A short cut review was carried out to establish whether routine use of emollients on the face reduced the incidence of frostbite in cold environments. 126 papers were found using the reported searches, of which three presented the best evidence to answer the clinical question. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of these papers are tabulated. It is concluded that the use of emollients on the face is not a good protection against frostbite and may even result in a higher risk...
November 2017: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/29035715/linear-and-crosslinked-polyurethanes-based-catalysts-for-reduction-of-methylene-blue
#16
Misbah Sultan, Asma Javeed, Maliha Uroos, Muhammad Imran, Farhat Jubeen, Shazia Nouren, Nazish Saleem, Ismat Bibi, Rashid Masood, Waqas Ahmed
The large amount of synthetic dyes in effluents is a serious concern to be addressed. The chemical reduction is one of the potential way to resolve this problem. In this study, linear and crosslinked polyurethanes i.e. LPUR & CLPUR were synthesized from toluene diisocyanate (TDI), polyethylene glycol (PEG;1000g/mole) and tetraethylenepentamine (TEPA). The structure and morphology of synthesized materials were examined by FTIR, SEM and BET. The CLPUR was found stable in aqueous system with 0.80g/cm(3) density and 16...
October 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29031227/development-of-a-graphene-oxide-chitosan-nanocomposite-for-the-removal-of-picric-acid-from-aqueous-solutions-study-of-sorption-parameters
#17
Mona Mohseni Kafshgari, Hasan Tahermansouri
The functionalization of graphene oxide (GO) with chitosan (Chi) has been investigated to prepare a nanocomposite material (GO-Chi) for the removal of picric acid from aqueous solutions. Materials were characterized by FT-IR, TGA, DTG, FESEM, EDX, XRD and BET. Batch experiments such as solution pH, amount of adsorbents, contact time, concentration of the picric acid and temperature were achieved to study sorption process. Kinetic studies were well described by pseudo-second-order kinetic model for both adsorbents...
October 7, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29031109/application-of-novel-ternary-deep-eutectic-solvents-as-a-functional-monomer-in-molecularly-imprinted-polymers-for-purification-of-levofloxacin
#18
Xiaoxia Li, Kyung Ho Row
A series of ecofriendly ternary deep eutectic solvents (DESs) with different molar ratios were prepared as candidate functional monomers. Three of the optimal ternary DESs as functional monomers were applied to the preparation of molecularly imprinted polymers (MIPs). After synthesis, the proposed polymers were characterized by elemental analysis (EA), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller surface area measurements (BET) and Fourier transform infrared spectroscopy (FT-IR)...
October 7, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29028457/photocatalytic-degradation-of-p-cresol-using-tio2-zno-hybrid-surface-capped-with-polyaniline
#19
Thabo J Brooms, Benton Otieno, Maurice S Onyango, Aoyi Ochieng
This study evaluated the photocatalytic activity of polyaniline (PANI)-capped titanium dioxide and zinc oxide (TiO2/ZnO) hybrid, for the degradation of P-Cresol. The hybrid was synthesized by precipitating ZnO on the surface of commercial TiO2. An "in situ" chemical oxidative polymerization method was used to prepare the PANI capped hybrid (TiO2/ZnO/PANI). The photocatalysts were characterized by powder X-ray diffraction (XRD), a Brunauer Emmett Teller (BET) analyzer, Fourier-transform infrared (FTIR) and photoluminescence spectroscopies, high resolution-transmission electron microscopy (HR-TEM) and thermogravimetric analysis (TGA)...
October 13, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28953471/a-novel-biochar-from-manihot-esculenta-crantz-waste-application-for-the-removal-of-malachite-green-from-wastewater-and-optimization-of-the-adsorption-process
#20
Buscotin Horax Beakou, Kaoutar El Hassani, Mohammed Amine Houssaini, Mounir Belbahloul, Elhassan Oukani, Abdellah Anouar
The adsorptive removal of Malachite Green (MG) by a novel biochar namely Cassava Rind Carbon (CRC) was studied in a batch system. Moreover, Box-Behnken Response Surface Methodology was used to optimize operating conditions of the adsorption process. Characterization was done by Thermo Gravimetric Analysis (TGA), Attenuated Total Reflectance Fourier Transform Infra-Red Spectroscopy (ATR/FTIR), Brunauer-Emmett-Teller (BET) surface area, Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and pH zero charge point (pHZCP)...
September 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
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