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https://www.readbyqxmd.com/read/28927272/nonaqueous-sol-gel-synthesis-of-anatase-nanoparticles-and-their-electrophoretic-deposition-in-porous-alumina
#1
Cedric Frantz, Alessandro Lauria, Cristina Vicente Manzano, Carlos Guerra-Nuñez, Markus Niederberger, Cédric Storrer, Johann Michler, Laetitia Vérnique Philippe
TiO2 nanoparticles were synthesized by nonaqueous sol-gel route using chloride precursor and benzyl alcohol as the solvent. The obtained 4 nm size anatase nanocrystals were readily dispersible in various polar solvents allowing for simple preparation of colloidal dispersions in water, isopropyl alcohol, dimethyl sulfoxide, and ethanol. Results showed that dispersed nanoparticles have acidic properties and exhibit positive zeta-potential which is suitable for their deposition by cathodic electrophoresis. Aluminum substrates were anodized in phosphoric acid in order to produce porous anodic oxide layers with pores ranging from 160 to 320 nm...
September 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28913006/uhplc-pda-assay-for-simultaneous-determination-of-vitamin-d3-and-menaquinone-7-in-pharmaceutical-solid-dosage-formulation
#2
Muhammad Jehangir, Mahmood Ahmed, Muhammad Imtiaz Shafiq, Abdul Samad, Iftikhar-Ul-Haq
A newly developed method based on ultrahigh performance liquid chromatography (UHPLC) was optimized for the simultaneous determination of vitamin D3 and menaquinone-7 (MK-7) in tablet formulation in the present study. UHPLC separation of vitamin D3 and MK-7 was performed with ACE Excel 2 C18-PFP column (2 μm, 2.1 × 100 mm) at 0.6 mL min(-1) flow rate, whereas the mobile phase consisted of methanol/water (19 : 1, v/v, phase A) and isopropyl alcohol (99.9%, phase B) containing 0.5% triethylamine. Isocratic separation of both the analytes was performed at 40°C by pumping the mobile phases A and B in the ratio of 50 : 50 (v/v, pH, 6...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28905380/enhancing-blood-donor-skin-disinfection-using-natural-oils
#3
Meshari Alabdullatif, Imen Boujezza, Mohamed Mekni, Mariam Taha, Dilini Kumaran, Qi-Long Yi, Ahmed Landoulsi, Sandra Ramirez-Arcos
BACKGROUND: Effective donor skin disinfection is essential in preventing bacterial contamination of blood components with skin flora bacteria like Staphylococcus epidermidis. Cell aggregates of S. epidermidis (biofilms) are found on the skin and are resistant to the commonly used donor skin disinfectants chlorhexidine-gluconate and isopropyl alcohol. It has been demonstrated that essential oils synergistically enhance the antibacterial activity of chlorhexidine-gluconate. The objective of this study was to test plant-extracted essential oils in combination with chlorhexidine-gluconate or chlorhexidine-gluconate plus isopropyl alcohol for their ability to eliminate S...
September 14, 2017: Transfusion
https://www.readbyqxmd.com/read/28903829/quantification-of-induced-hypothermia-from-aseptic-scrub-applications-during-rodent-surgery-preparation
#4
Anna M Skorupski, Jingyi Zhang, Danielle Ferguson, Frank Lawrence, F Claire Hankenson
Laboratory mice (Mus musculus) are prone to develop hypothermia during anesthesia for surgery, thus potentially impeding anesthetic recovery, wound healing, and future health. The core body temperatures of isoflurane-anesthetized mice are influenced by the choice of supplemental heat sources; however, the contribution of various surgical scrubs on the body temperatures of mice under gas anesthesia has not been assessed. We sought to quantify the effect of using alcohol (70% isopropyl alcohol [IPA]) compared with saline to rinse away surgical scrub on the progression of hypothermia in anesthetized mice (n = 47)...
September 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28876907/one-step-production-of-amphiphilic-nano-fibrillated-cellulose-using-a-cellulose-producing-bacterium
#5
Kenji Tajima, Ryo Kusumoto, Ryota Kose, Hiroyuki Kono, Tokuo Matsushima, Takuya Isono, Takuya Yamamoto, Toshifumi Satoh
Nano-fibrillated bacterial cellulose (NFBC) is produced by culturing a cellulose-producing bacterium (Gluconacetobacter intermedius NEDO-01) with rotation or agitation in medium supplemented with carboxymethylcellulose (CMC). Despite a high yield and dispersibility in water, the product immediately aggregates in organic solvents. To broaden its applicability, we prepared amphiphilic NFBC by culturing strain NEDO-01 in medium supplemented with hydroxyethylcellulose or hydroxypropylcellulose instead of CMC. Transmission electron microscopy analysis revealed that the resultant materials (HE-NFBC and HP-NFBC, respectively) comprised relatively uniform fibers with diameters of 33 ± 7 and 42 ± 8 nm, respectively...
September 6, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28865738/the-yeasticidal-activity-of-chemical-disinfectants-and-antiseptics-against-candida-auris
#6
Ginny Moore, Silke Schelenz, Andrew M Borman, Elizabeth M Johnson, Colin S Brown
Candida auris appears to be readily transmitted between patients, yet, information regarding the efficacy of environmental disinfection and skin decolonisation is lacking. A quantitative suspension test (EN 13624:2013) was used to evaluate the yeasticidal activity of different chemical disinfectants and antiseptics against C. auris and C. albicans. When tested in suspension, both a chlorine-based disinfectant and iodine-based skin antiseptic were effective against C. auris suggesting that, if applied appropriately, their use could reduce environmental contamination and skin colonisation respectively...
August 30, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28856894/a-low-energy-route-to-dna-wrapped-carbon-nanotubes-via-replacement-of-bile-salt-surfactants
#7
Jason K Streit, Jeffrey A Fagan, Ming Zheng
DNA-wrapped carbon nanotubes are a class of bionano hybrid molecules that have enabled carbon nanotube sorting, controlled assembly, and biosensing and bioimaging applications. The current method of synthesizing these hybrids via direct sonication of DNA/nanotube mixtures is time-consuming and not suitable for high-throughput synthesis and combinatorial sequence screening. Additionally, the direct sonication method does not make use of nanotubes presorted by extensively developed surfactant-based methods, is not effective for large diameter (>1 nm) tubes, and cannot maintain secondary and tertiary structural and functional domains present in certain DNA sequences...
September 11, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28831284/effect-of-isopropyl-alcohol-concentration-and-etching-time-on-wet-chemical-anisotropic-etching-of-low-resistivity-crystalline-silicon-wafer
#8
Eyad Abdur-Rahman, Ibrahim Alghoraibi, Hassan Alkurdi
A micropyramid structure was formed on the surface of a monocrystalline silicon wafer (100) using a wet chemical anisotropic etching technique. The main objective was to evaluate the performance of the etchant based on the silicon surface reflectance. Different isopropyl alcohol (IPA) volume concentrations (2, 4, 6, 8, and 10%) and different etching times (10, 20, 30, 40, and 50 min) were selected to study the total reflectance of silicon wafers. The other parameters such as NaOH concentration (12% wt.), the temperature of the solution (81...
2017: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/28796919/evaluation-of-a-needle-disinfectant-technique-to-reduce-infection-related-hospitalization-following-transrectal-prostate-biopsy
#9
Gregory B Auffenberg, Ji Qi, Yuqing Gao, David C Miller, Zaojun Ye, Andrew Brachulis, Susan Linsell, Tejal N Gandhi, David Kraklau, James E Montie, Khurshid R Ghani
OBJECTIVES: To determine whether a needle disinfectant technique during transrectal prostate biopsy is associated with lower rates of infection-related hospitalization. SUBJECTS AND METHODS: We conducted a retrospective analysis of all transrectal prostate biopsies performed across the Michigan Urological Surgery Improvement Collaborative (MUSIC) from January 2012 through March 2015. Natural variation in technique allowed us to evaluate for differences in infection-related hospitalizations based on whether or not a needle disinfectant technique was utilized...
August 10, 2017: BJU International
https://www.readbyqxmd.com/read/28795792/lu2-c82-nanorods-with-enhanced-photoluminescence-and-photoelectrochemical-properties
#10
Wangqiang Shen, Li Zhang, Shushu Zheng, Yunpeng Xie, Xing Lu
One-dimensional (1D) single-crystalline hexagonal nanorods of Lu2@C3v(8)-C82 were prepared for the first time using the liquid-liquid interface precipitation (LLIP) method from the interfaces between carbon disulfide (CS2) and isopropyl alcohol (IPA). The length of the nanorods can be readily controlled by varying the concentration of the Lu2@C82 solution in addition to the volume ratio of CS2 to IPA. The latter factor also exhibits a significant influence on the morphology of the crystals. The crystalline structure of the nanorods has been investigated by XRD and selected area electron diffraction (SAED), suggesting a face-centered cubic structure...
August 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28780437/elemental-mercury-removal-from-flue-gas-by-cofe2o4-catalyzed-peroxymonosulfate
#11
Yi Zhao, Xiaoying Ma, Peiyao Xu, Han Wang, Yongchun Liu, Anen He
A magnetic cobalt ferrite (CoFe2O4) catalyst was prepared by sol-gel method, and characterized by a X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Brunauer-Emmett-Teller (BET) and hysteresis loop method. The chemical states on surface of the fresh and spent catalysts were analyzed by a X-ray photoelectron spectroscopy (XPS). The experiments of elemental mercury (Hg(0)) removal from flue gas were conducted in a laboratory scale using activated peroxymonosulfate (PMS) catalyzed by CoFe2O4, and the effects of the dosage of catalyst, the concentration of PMS, initial solution pH and reaction temperature on mercury removal efficiency were investigated...
July 29, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28772091/riding-high-into-the-danger-zone-a-review-of-potential-differences-in-chemical-exposures-in-fighter-pilots-resulting-from-high-altitude-and-g-forces
#12
REVIEW
Matthew W Linakis, Kathleen M Job, Xiaoxi Liu, Scott C Collingwood, Heather A Pangburn, Darrin K Ott, Catherine M T Sherwin
When in flight, pilots of high performance aircraft experience conditions unique to their profession. Training flights, performed as often as several times a week, can expose these pilots to altitudes in excess of 15 km (~50,000 ft, with a cabin pressurized to an altitude of ~20,000 ft), and the maneuvers performed in flight can exacerbate the G-forces felt by the pilot. While the pilots specifically train to withstand these extreme conditions, the physiologic stress could very likely lead to differences in the disposition of chemicals in the body, and consequently, dangerously high exposures...
September 2017: Expert Opinion on Drug Metabolism & Toxicology
https://www.readbyqxmd.com/read/28768592/effect-of-hand-lotion-on-the-effectiveness-of-hygienic-hand-antisepsis-implications-for-practicing-hand-hygiene
#13
Helga Paula, Nils-Olaf Hübner, Ojan Assadian, Katja Bransmöller, Romy Baguhl, Harald Löffler, Axel Kramer
BACKGROUND: Skin protection products should be used after washing hands with soap, during breaks, after work, and during leisure time. Aside from their beneficial effects, skin care products may also interact with alcohol-based hand disinfectants by reducing their efficacy. The aim of this study was to investigate the effect of a hand lotion on the effectiveness of hygienic hand antisepsis using an alcohol-based handrub. METHODS: The effect of a protective hand lotion against an isopropyl alcohol-based handrub was investigated in 20 healthy volunteers according to the European standard test procedure EN 1500 in the following combinations: handwashing and application of hand lotion, only application of hand lotion, and no washing and no hand lotion (control), each for 5 minutes or 1 hour before hand antisepsis...
August 1, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28763758/simultaneous-determination-of-three-di-caffeoylquinic-acids-by-uhplc-ms-ms-in-rat-plasma-and-its-application-to-a-comparative-pharmacokinetic-study-in-normal-and-acute-lung-injury-rat
#14
Yanjuan Wang, Yanmin Wang, Xiao Wu, Zhili Xiong, Wei Xiao, Chao Ma
Acute lung injury (ALI) is a severe inflammatory disease with high mortality rates. Di-caffeoylquinic acids (DCQAs), the bioactive components of reduning injection (RDN), may play important roles in the protective effect on acute lung injury (ALI). A selective and rapid ultra high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method has been developed and validated for the simultaneous determination of 3,4-, 3,5- and 4,5-DCQA in rat plasma. The DCQAs were extracted by liquid-liquid extraction with ethyl acetate-isopropyl alcohol (7:3, v/v)...
July 25, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28755490/metabolic-engineering-of-isopropyl-alcohol-producing-escherichia-coli-strains-with-13-c-metabolic-flux-analysis
#15
Nobuyuki Okahashi, Fumio Matsuda, Katsunori Yoshikawa, Tomokazu Shirai, Yoshiko Matsumoto, Mitsufumi Wada, Hiroshi Shimizu
Metabolic engineering of isopropyl alcohol (IPA)-producing Escherichia coli strains was conducted along with (13) C-metabolic flux analysis (MFA). A metabolically engineered E. coli strain expressing the adc gene derived from Clostridium acetobutylicum and the IPADH gene from C. beijerinckii did not produce IPA during its exponential growth phase in the aerobic batch culture. (13) C-MFA was carried out, and revealed a deficiency in NADPH regeneration for IPA production in growth phase. Based on these findings, we used nitrogen-starved culture conditions to reduce NADPH consumption for biomass synthesis...
July 29, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28753970/reversed-phase-uhplc-enantiomeric-separation-of-rasagiline-salts-using-a-chiralpak-%C3%A2-agp-column
#16
Nagarajan Balaji, Sayeeda Sultana
We report the first rapid ultra-high performance liquid chromatographic (UHPLC) enantiomeric reversed-phase separation of rasagiline mesylate and its tartrate salts using a Chiralpak(®) AGP column (50 mm × 2.1 mm, 5 μm) as a stationary phase. This method was developed as an alternative to the usage of previously reported normal-phase chiral LC columns for isomer separation. Our method is based on an isocratic approach using a mixture of ammonium acetate and isopropyl alcohol (90:10, v/v) as the mobile phase (0...
July 19, 2017: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/28729139/endoscope-drying-and-its-pitfalls
#17
REVIEW
J Kovaleva
Inadequate drying of endoscope channels is a possible cause of replication and survival of remaining pathogens during storage. The presence during storage of potentially contaminated water in endoscope channels may promote bacterial proliferation and biofilm formation. An incomplete drying procedure or lack of drying and not storing in a vertical position are the most usual problems identified during drying and endoscope storage. Inadequate drying and storage procedures, together with inadequate cleaning and disinfection, are the most important sources of endoscope contamination and post-endoscopic infection...
July 17, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28711498/promotion-of-hair-growth-by-newly-synthesized-ceramide-mimetic-compound
#18
Bu-Mahn Park, Soon-Sun Bak, Kyung-Oh Shin, Minhee Kim, Daehwan Kim, Sang-Hun Jung, Sekyoo Jeong, Young Kwan Sung, Hyun Jung Kim
Based on the crucial roles of ceramides in skin barrier function, use of ceramides or their structural mimetic compounds, pseudoceramides, as cosmetic ingredients are getting more popular. While currently used pseudoceramides are intended to substitute the structural roles of ceramides in stratum corneum, development of bioactive pseudoceramides has been repeatedly reported. In this study, based on the potential involvement of sphingolipids in hair cycle regulation, we investigated the effects of newly synthesized pseudoceramide, bis-oleamido isopropyl alcohol (BOI), on hair growth using cultured human hair follicles and animal models...
September 9, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28705429/disinfection-of-tonometers-a-report-by-the-american-academy-of-ophthalmology
#19
Anna K Junk, Philip P Chen, Shan C Lin, Kouros Nouri-Mahdavi, Sunita Radhakrishnan, Kuldev Singh, Teresa C Chen
OBJECTIVE: To examine the efficacy of various disinfection methods for reusable tonometer prisms in eye care and to highlight how disinfectants can damage tonometer tips and cause subsequent patient harm. METHODS: Literature searches were conducted last in October 2016 in the PubMed and the Cochrane Library databases for original research investigations. Reviews, non-English language articles, nonophthalmology articles, surveys, and case reports were excluded. RESULTS: The searches initially yielded 64 unique citations...
July 11, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28695953/triaminoborane-bridged-diphosphine-complexes-with-ni-and-pd-coordination-chemistry-structures-and-ligand-centered-reactivity
#20
Kyounghoon Lee, Courtney M Donahue, Scott R Daly
The synthesis, coordination chemistry, and reactivity of two diphosphines containing the cyclic triaminoborane 1,8,10,9-triazaboradecalin (TBD) are described. To evaluate the ligand-centered reactivity of (Ph)TBDPhos and (iPr)TBDPhos, the complexes ((Ph)TBDPhos)MCl2 and ((iPr)TBDPhos)MCl2, where M = Ni and Pd, were prepared and characterized by elemental analysis, multinuclear NMR spectroscopy ((1)H, (13)C, (31)P, and (11)B), and single-crystal X-ray diffraction (XRD). Despite very low boron Lewis acidity in the TBD backbone, ((Ph)TBDPhos)NiCl2 (1) and ((Ph)TBDPhos)PdCl2 (3) react with H2O, alcohols, and hydrated fluoride reagents in the presence of NEt3 to yield trans H-O or H-F addition across the bridgehead N-B bond...
July 25, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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