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https://www.readbyqxmd.com/read/29351225/a-composite-photocatalyst-based-on-hydrothermally-synthesized-cu%C3%A2-znsns%C3%A2-powders
#1
Shih-Jen Lin, Jyh-Ming Ting, Kuo-Chin Hsu, Yaw-Shyan Fu
A novel composite photocatalyst based on Cu₂ZnSnS₄ (CZTS) powders was synthesized and investigated for use as a photocatalyst. CZTS powders were first made using a conventional hydrothermal method and were then used to grow silver nanoparticles hybridized onto the CZTS under various conditions through a microwave-assisted hydrothermal process. After the obtained samples were subsequently mixed with 1T-2H MoS₂, the three synthesized component samples were characterized using X-ray diffractometry (XRD), scanning electron microscopy, transmission electron microscopy (FE-SEM, FE-TEM), UV-visible spectroscopy (UV-Vis), Brunauer-Emmet-Teller (BET), photoluminescence spectroscopy (PL), and X-ray photoelectron spectroscopy (XPS)...
January 19, 2018: Materials
https://www.readbyqxmd.com/read/29349982/-effects-of-tranexamic-acid-combined-with-temporary-drain-clamping-on-postoperative-blood-loss-in-total-knee-arthroplasty
#2
Yi-Long Dong, Yue-Nan Qian, Xi-Qiang Zhong, Guang-Jie Shen, Chun-Yuan Cai
OBJECTIVE: To evaluate the efficacy and safety of one dose tranexamic acid combined with temporary drain lamping in primary unilateral total knee arthroplasty. METHODS: Total 160 patients undergoing unilateral primary total knee arthroplasty between January 2012 and December 2013 were randomly divided into four groups(40 cases in each group):group A (the drain was clamped for 2 hours after the operation and the patients received 20 ml physiological saline), group B(the drain was clamped for 2 hours after the operation and the patients received 10 ml tranexamic acid and 10 ml physiological saline), group C (the drain was clamped for 4 hours after the operation and the patients received 20 ml physiological saline) and group D(the drain was clamped for 4 hours after the operation and the patients received 10 ml tranexamic acid and 10 ml physiological saline)...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29345468/photochemistry-of-solid-films-of-the-neonicotinoid-nitenpyram
#3
Kifle Z Aregahegn, Michael J Ezell, Barbara J Finlayson-Pitts
The environmental fates of nitenpyram (NPM), a widely used neonicotinoid insecticide, are not well known. A thin solid film of NPM deposited on a germanium attenuated total reflectance (ATR) crystal was exposed to radiation from a low-pressure mercury lamp at 254 nm, or from broadband low pressure mercury photolysis lamps centered at 350 or 313 nm. The loss during photolysis was followed in time using FTIR. The photolysis quantum yields (), defined as the number of NPM molecules lost per photon absorbed, were determined to be (9...
January 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29345131/photolithography-based-nanopatterning-using-re-entrant-photoresist-profile
#4
Tong Kim, Yei Hwan Jung, Huilong Zhang, Kwangeun Kim, Juhwan Lee, Zhenqiang Ma
Photolithography based on optical mask is widely used in academic research laboratories due to its low-cost, simple mechanism, and ability to pattern in micron sized features on a wafer scale area. Since the resolution is bound by diffraction limits of the light source, nano-scale patterning using photolithography requires short wavelength light source combined with sophisticated optical elements, adding complexity and cost. In this paper, a novel method of sub-wavelength patterning process using conventional i-line mercury lamp is introduced, without the use of such advanced optical tools...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29344968/a-novel-nested-polymerase-chain-reaction-assay-targeting-plasmodium-mitochondrial-dna-in-field-collected-anopheles-mosquitoes
#5
M Calzetta, E Perugini, G Seixas, C A Sousa, W M Guelbeogo, N Sagnon, A Della Torre, J Pinto, M Pombi, E Mancini
Sensitive techniques for the detection of Plasmodium (Aconoidasida: Plasmodiidae) sporozoites in field-collected malaria vectors are essential for the correct assessment of risk for malaria transmission. A real-time polymerase chain reaction (RT-PCR) protocol targeting Plasmodium mtDNA proved to be much more sensitive in detecting sporozoites in mosquitoes than the widely used enzyme-linked immunosorbent assay targeting Plasmodium circumsporozoite protein (CSP-ELISA). However, because of the relatively high costs associated with equipment and reagents, RT-PCRs are mostly used to assess the outcomes of experimental infections in the frame of research experiments, rather than in routine monitoring of mosquito infection in the field...
January 18, 2018: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/29344500/pilot-study-of-a-large-eye-surgically-induced-dry-eye-rabbit-model-by-selective-removal-of-the-harderian-lacrimal-and-meibomian-glands
#6
Arthur S Polans, Jonathan F McAnulty, Paul O Phelps, Soesiawati R Darjatmoko, Christopher K Burris, Daniel M Albert
Background/Aims: Establish a reliable rabbit dry eye (DE) model. Methods: An interventional cohort study surgically removing glands contributing to the tear film. Eight rabbits were studied after removal of left lacrimal, Harderian, or both glands. Additional rabbits had Meibomian glands in the left eye thermally obstructed. All were followed for 10 weeks with phenol red thread (PRT) and slit-lamp examination with 2% fluorescein. We assessed corneal sensitivity using a Cochet-Bonnet esthesiometer...
December 2017: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/29343880/novel-application-of-loop-mediated-isothermal-amplification-for-rapid-detection-of-gene-translocation
#7
Ibu Matsuzaki, Hideto Iguchi, Yurina Mikasa, Hiromu Morishita, Katsuya Okuda, Keita Nakaguchi, Yuki Mori, Yoshifumi Iwahashi, Kenji Warigaya, Masakazu Fujimoto, Fumiyoshi Kojima, Shin-Ichi Murata
Identification of fusion genes in cancer is essential for pathological diagnosis and clinical therapy. Although methods for detection of fusion genes, such as fluorescence in situ hybridization (FISH) and real-time polymerase chain reaction (PCR), have been developed in last two decades, these methods are not ideal for detection of these genetic alterations owing to their high cost and time-consuming procedures. In this study, we developed novel application for detection of gene translocations using loop-mediated isothermal amplification (LAMP)...
December 26, 2017: Acta Histochemica et Cytochemica
https://www.readbyqxmd.com/read/29342878/improved-photo-ignition-of-carbon-nanotubes-ferrocene-using-a-lipophilic-porphyrin-under-white-power-led-irradiation
#8
Paolo Visconti, Patrizio Primiceri, Roberto de Fazio, Antonio Paolo Carlucci, Selma Elaine Mazzetto, Giuseppe Mele
The aim of this work is to investigate and characterize the photo-ignition process of dry multi-walled carbon nanotubes (MWCNTs) mixed with ferrocene (FeCp₂) powder, using an LED (light-emitting diode) as the light source, a combination that has never been used, to the best of our knowledge. The ignition process was improved by adding a lipophilic porphyrin (H₂Pp) in powder to the MWCNTs/FeCp₂ mixtures-thus, a lower ignition threshold was obtained. The ignition tests were carried out by employing a continuous emission and a pulsed white LED in two test campaigns...
January 13, 2018: Materials
https://www.readbyqxmd.com/read/29342438/vitreoretinal-complications-and-outcomes-in-92-eyes-undergoing-surgery-for-modified-osteo-odonto-keratoprosthesis-a-10-year-review
#9
Pukhraj Rishi, Ekta Rishi, Vishvesh Agarwal, Sridevi Nair, Geetha Iyer, Bhaskar Srinivasan, Shweta Agarwal
PURPOSE: To analyze vitreoretinal (VR) complications and treatment outcomes in eyes undergoing modified osteo-odonto-keratoprosthesis (OOKP) surgery. DESIGN: Retrospective case series. PARTICIPANTS: All patients who underwent modified OOKP (mOOKP) surgery at a tertiary eye-care center from March 2003 to February 2013 were included. METHODS: Medical records were reviewed for relevant medical history, best-corrected visual acuity (BCVA), slit-lamp examination, ultrasound scan, oral examination findings, and VR complications...
January 13, 2018: Ophthalmology
https://www.readbyqxmd.com/read/29341601/determining-double-bond-position-in-lipids-using-online-ozonolysis-coupled-to-liquid-chromatography-and-ion-mobility-mass-spectrometry
#10
Rachel A Harris, Jody C May, Craig A Stinson, Yu Xia, John A McLean
The increasing focus on lipid metabolism has revealed a need for analytical techniques capable of structurally characterizing lipids with a high degree of specificity. Lipids can exist as any one of a large number of double bond positional isomers, which are indistinguishable by single-stage mass spectrometry alone. Ozonolysis reactions coupled to mass spectrometry have previously been demonstrated as a means for localizing double bonds in unsaturated lipids. Here we describe an online, solution-phase reactor using ozone produced via a low-pressure mercury lamp, which generates aldehyde products diagnostic of cleavage at a particular double bond position...
January 17, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29339609/effects-of-ph-and-coexisting-chemicals-on-photolysis-of-perfluorooctane-sulfonate-using-an-excited-xenon-dimer-lamp
#11
Naoyuki Kishimoto, Koji Doda
Vacuum ultraviolet (VUV) photolysis at the wavelength of 172 nm in a sulfate solution was introduced as a more efficient process for perfluorooctane sulfonate (PFOS) degradation than ultraviolet (UV) photolysis at 254 nm. The effects of pH and coexisting chemicals on VUV photolysis under the coexistence of 100 mM sulfate were investigated. VUV irradiation successfully degraded PFOS, and the degradation rate was 5.5 times higher than by UV photolysis. Direct VUV photolysis was inferred to mainly contribute to PFOS degradation...
January 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29339330/photocatalytic-degradation-of-aniline-using-an-autonomous-rotating-drum-reactor-with-both-solar-and-uv-c-artificial-radiation
#12
A Durán, J M Monteagudo, I San Martín, S Merino
The aim of this work was to evaluate the performance of a novel self-autonomous reactor technology (capable of working with solar irradiation and artificial UV light) for water treatment using aniline as model compound. This new reactor design overcomes the problems of the external mass transfer effect and the accessibility to photons occurring in traditional reaction systems. The UV-light source is located inside the rotating quartz drums (where TiO2 is immobilized), allowing light to easily reach the water and the TiO2 surface...
January 12, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29338772/incidence-risk-factors-and-impact-of-protocolised-care-on-exposure-keratopathy-in-critically-ill-adults-a-two-phase-prospective-cohort-study
#13
Obaid Kousha, Zubaid Kousha, Jonathan Paddle
BACKGROUND: Exposure keratopathy (EK) has a high incidence in critically ill patients. We aimed to determine the rate of EK in patients admitted to our intensive care unit (ICU), identify risk factors for developing EK and ascertain the effectiveness of a protocol to prevent EK. METHODS: We undertook a two-phase prospective cohort single-centre study in a general adult ICU. The first phase of the study was observational. In the second phase of the study an eye care protocol was introduced...
January 16, 2018: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29338658/the-chemical-club-an-early-nineteenth-century-scientific-dining-club
#14
Andrew Lacey
The Chemical Club (fl. 1806-1828) was a small scientific dining club in London. Among its members were Sir Humphry Davy, William Hyde Wollaston, and Alexander Marcet. Other accomplished men of science, including John Dalton, Jöns Jacob Berzelius, and Augustin Pyramus de Candolle, also attended its meetings as guests. This article, drawing on the unpublished papers of Lionel Felix Gilbert, as well as a range of contemporary sources in print and manuscript, presents the first substantial history of the Chemical Club, and situates it in the context of the scientific and social networks of the period...
August 2017: Ambix
https://www.readbyqxmd.com/read/29338133/pimasertib-associated-ophthalmological-adverse-events
#15
Elon H C van Dijk, Wim H J Kruit, Martine J Jager, Gregorius P M Luyten, Johannes R Vingerling, Camiel J F Boon
PURPOSE: To analyse ophthalmological adverse events associated with mitogen-activated protein kinase kinase (MEK) inhibition with pimasertib treatment for metastatic cutaneous melanoma (CM). METHODS: In this prospective observational, cohort-based, cross-sectional study, eight patients treated with the MEK inhibitor pimasertib received a complete ophthalmic examination. This included Early Treatment of Diabetic Retinopathy Study best-corrected visual acuity, visual field testing, colour vision testing, slit-lamp examination, applanation tonometry, indirect ophthalmoscopy, digital colour fundus photography and optical coherence tomography (OCT)...
January 16, 2018: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29336956/reverse-transcription-loop-mediated-isothermal-amplification-for-species-specific-detection-of-tomato-chlorotic-spot-orthotospovirus
#16
Xuelian Sui, Shouan Zhang, Zujian Wu, Kai-Shu Ling
Tomato chlorotic spot orthotospovirus (TCSV) is an emerging orthotospovirus that can cause severe disease on tomato plants. There are at least four orthotospoviruses infecting tomato, and mixed infection of two or more orthotospoviruses in a single tomato plant is quite common in the field. With similarity in the symptomatology and cross serological reactivity among tomato-infecting orthotospoviruses, especially between TCSV and groundnut ringspot orthotospovirus (GRSV), the current serological tests could not achieve definite and accurate species-specific determination in disease diagnosis...
January 11, 2018: Journal of Virological Methods
https://www.readbyqxmd.com/read/29336627/clinical-severity-classification-using-automated-conjunctival-hyperemia-analysis-software-in-patients-with-superior-limbic-keratoconjunctivitis
#17
Junki Kurita, Jun Shoji, Noriko Inada, Tsuyoshi Yoneda, Tamaki Sumi, Masahiko Kobayashi, Yasuhiro Hoshikawa, Atsuki Fukushima, Satoru Yamagami
PURPOSE: Digitization of clinical observation is necessary for assessing the severity of superior limbic keratoconjunctivitis (SLK). This study aimed to use a novel quantitative marker to examine hyperemia in patients with SLK. MATERIALS AND METHODS: We included six eyes of six patients with both dry eye disease and SLK (SLK group) and eight eyes of eight patients with Sjögren syndrome (SS group). We simultaneously obtained the objective finding scores by using slit-lamp examination and calculated the superior hyperemia index (SHI) with an automated conjunctival hyperemia analysis software by using photographs of the anterior segment...
January 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29335903/anterior-cervical-corpectomy-and-fusion-versus-posterior-laminoplasty-for-the-treatment-of-oppressive-myelopathy-owing-to-cervical-ossification-of-posterior-longitudinal-ligament-a-meta-analysis
#18
Rongqing Qin, Xiaoqing Chen, Pin Zhou, Ming Li, Jie Hao, Feng Zhang
PURPOSE: The purpose of this research is to compare the clinical efficacy, postoperative complication and surgical trauma between anterior cervical corpectomy and fusion versus posterior laminoplasty for the treatment of oppressive myelopathy owing to cervical ossification of the posterior longitudinal ligament (OPLL). STUDY DESIGN: Systematic review and meta-analysis. METHODS: An comprehensive search of literature was implemented in three electronic databases (Embase, Pubmed, and the Cochrane library)...
January 15, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29335461/pixelated-spatial-gene-expression-analysis-from-tissue
#19
A Ganguli, A Ornob, N Spegazzini, Y Liu, G Damhorst, T Ghonge, B Thornton, C J Konopka, W Dobrucki, S E Clare, R Bhargava, A M Smith, F Kosari, R Bashir
Here, we present a technique that performs on-chip picoliter real-time reverse transcriptase loop mediated isothermal amplification (RT-LAMP) reactions on a histological tissue section without any analyte purification while preserving the native spatial location of the nucleic acid molecules. We demonstrate this method by amplifying TOP2A messenger RNA (mRNA) in a prostate cancer xenograft with 100 µm spatial resolution and by visualizing the variation in threshold time of amplification across the tissue...
January 15, 2018: Nature Communications
https://www.readbyqxmd.com/read/29334733/surface-functionalization-with-carboxylic-acids-by-photochemical-microcontact-printing-and-tetrazole-chemistry
#20
Christoph Buten, Sebastian Lamping, Martin Körsgen, Heinrich F Arlinghaus, Craig Jamieson, Bart Jan Ravoo
In this paper we show that carboxylic acid functionalized molecules can be patterned by photochemical microcontact printing on tetrazole-terminated self-assembled monolayers. Upon irradiation, tetrazoles eliminate nitrogen to form highly reactive nitrile imines, which can be ligated with several different nucleophiles, carboxylic acids being most reactive. As a proof of concept, we immobilized trifluoroacetic acid to monitor the reaction with X-ray photoelectron spectroscopy (XPS). Moreover, we also immobilized peptides and fabricated carbohydrate-lectin as well as biotin-streptavidin microarrays using this method...
January 16, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
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