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https://www.readbyqxmd.com/read/28737813/the-synthesis-of-cuymnzal1-zox-mixed-oxide-as-a-low-temperature-nh3-scr-catalyst-with-enhanced-catalytic-performance
#1
Qinghua Yan, Sining Chen, Lei Qiu, Yanshan Gao, Dermot O'Hare, Qiang Wang
A new type of low-temperature selective catalytic reduction (SCR) catalyst, CuyMnzAl1-zOx, derived from layered double hydroxides is presented in this contribution. By tuning the Cu/Mn/Al ratio, the optimal catalyst Cu2Mn0.5Al0.5Ox resulted in a NOx conversion of 91.2% at 150 °C, which is much higher than that of all other control catalysts, Cu2AlOx (71.1%), Cu-Mn/γ-Al2O3 (65.23%), and Mn/γ-Al2O3 (59.32%). All samples were characterized in detail using various physico-chemical techniques including XRD, BET, FTIR, TEM, H2-TPR, NH3-TPD, and XPS analyses, and the results revealed that the superior catalytic performance of the Cu2Mn0...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737606/visual-acuity-and-contrast-sensitivity-development-in-children-sweep-visually-evoked-potential-and-psychophysics
#2
Fahad M Almoqbel, Elizabeth L Irving, Susan J Leat
PURPOSE: The purpose of this study was to investigate the development of visual acuity (VA) and contrast sensitivity in children as measured with objective (sweep visually evoked potential) and subjective, psychophysical techniques, including signal detection theory (SDT), which attempts to control for differences in criterion or behavior between adults and children. Furthermore, this study examines the possibility of applying SDT methods with children. METHODS: Visual acuity and contrast thresholds were measured in 12 children 6 to 7 years old, 10 children 8 to 9 years old, 10 children 10 to 12 years old, and 16 adults...
July 21, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28717398/preclinical-evaluation-of-nf-%C3%AE%C2%BAb-triggered-dendritic-cells-expressing-the-viral-oncogenic-driver-of-merkel-cell-carcinoma-for-therapeutic-vaccination
#3
Kerstin F Gerer, Michael Erdmann, Sine R Hadrup, Rikke Lyngaa, Lena-Marie Martin, Reinhard E Voll, Beatrice Schuler-Thurner, Gerold Schuler, Niels Schaft, Stefanie Hoyer, Jan Dörrie
BACKGROUND: Merkel cell carcinoma (MCC) is a rare but very aggressive skin tumor that develops after integration of a truncated form of the large T-antigen (truncLT) of the Merkel cell polyomavirus (MCV) into the host's genome. Therapeutic vaccination with dendritic cells (DCs) loaded with tumor antigens is an active form of immunotherapy, which intends to direct the immune system towards tumors which express the respective vaccination antigens. METHODS: Cytokine-matured monocyte-derived DCs of healthy donors and MCC patients were electroporated with mRNA encoding the truncLT...
July 2017: Therapeutic Advances in Medical Oncology
https://www.readbyqxmd.com/read/28711399/restrictive-bare-stent-prevents-distal-stent-graft-induced-new-entry-in-endovascular-repair-of-type-b-aortic-dissection
#4
Yang Zhao, Yitian Chen, Mian Wang, Liang Zheng, Zilun Li, Guangqi Chang, Henghui Yin
OBJECTIVE: Distal stent graft-induced new entry (SINE) can occur after thoracic endovascular aortic repair (TEVAR) of type B aortic dissection. This study investigated the mechanism of distal SINE and its prevention using a restrictive bare stent (RBS) technique. METHODS: From January 2013 to December 2014, 68 consecutive type B aortic dissection patients received endovascular repair at our center. The RBS technique was used with distal oversizing (between the diameter of the thoracic stent graft and the descending aorta true lumen diameter at the level of the intended distal edge of the thoracic stent graft) >20%...
July 13, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28708591/an-improved-nerve-sparing-radical-hysterectomy-technique-for-cervical-cancer-using-the-paravesico-vaginal-space-as-a-new-surgical-landmark
#5
Yuqin Zhang, Tingyan Shi, Sheng Yin, Sining Ma, Di Shi, Jun Guan, Libing Xiang, Yang Liu, Yulan Ren, Deyan Tan, Rongyu Zang
Bladder dysfunction remains a major postoperative challenge for early stage cervical cancer patients. The present prospective phase 2 trial in patients with stage IB1 and IIA1 cervical cancer follows up on our previous, unpublished work describing a new surgical landmark, the paravesico-vaginal space. We describe a novel nerve-sparing radical hysterectomy (NSRH) approach to treat early stage cervical cancer without compromising local control rate or survival. Between September 2015 and August 2016, 49 patients were enrolled to receive NSRH...
July 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28700217/mechanisms-of-symmetry-breaking-in-a-multidimensional-flashing-particle-ratchet
#6
Ofer Kedem, Bryan Lau, Emily A Weiss
Ratcheting is a mechanism that produces directional transport of particles by rectifying nondirectional energy using local asymmetries rather than a net bias in the direction of transport. In a flashing ratchet, an oscillating force (here, an AC field) is applied perpendicular to the direction of transport. In an effort to explore the properties of current experimentally realizable ratchet systems, and to design new ones, this paper describes classical simulations of a damped flashing ratchet that transports charged nanoparticles within a transport layer of finite, non-zero thickness...
July 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28699920/systematic-periodicity-in-waviness-of-vertically-aligned-carbon-nanotubes-explained-by-helical-buckling
#7
Mehdi Jahangiri
A hypothesis is proposed in this work to account for the geometry of individual vertically aligned carbon nanotubes (VACNTs) that not only justifies the directionality of their growth, but also explains the origin of the waviness frequently reported for these nanotube forests. Such waviness has fundamental effects on the transport/conduction properties of VACNTs, either through or along them, regarding phenomena such as mass, stress, heat and electricity. Despite the general opinion about randomness of CNTs tortuosity, we demonstrate here that rules of helical buckling of tubular strings is applicable to VACNTs, based on which a regular 3D helical geometry is proposed for VACNTs, with a 2D sine wave shape side-profile...
July 12, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28697996/s-25-hydroxyvitamin-d-and-c3-epimers-in-pregnancy-and-infancy-an-odense-child-cohort-study
#8
Nanne Dreier Mydtskov, Sine Lykkedegn, Palle Back Nielsen Fruekilde, Jan Nielsen, Torben Barington, Henrik Thybo Christesen
BACKGROUND: Analysis of serum 25-hydroxyvitamin D (s-25(OH)D) may be complicated by the less active or in-active vitamin D metabolite C3-epi-25(OH)D3 (C3-epimer). We aimed to explore the relationship between s-C3-epimer and s-25(OH)D and other determinants and describe the longitudinal course of the C3-epimer fraction in paired mother-child samples. METHOD: S-25(OH)D and s-C3-epimer were estimated by liquid chromatography mass spectrometry in 290 mother-infant pairs from the population-based Odense Child Cohort...
July 8, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28692933/contrast-enhancement-of-nanomaterials-using-phase-plate-stem
#9
Hiroki Minoda, Takayuki Tamai, Yuya Ohmori, Hirofumi Iijima
Visualizing materials composed of light elements is difficult, and the development of an imaging method that enhances the phase contrast of such materials has been of much interest. In this study, we demonstrate phase-plate scanning transmission electron microscopy (P-STEM), which we developed recently, and its application to nanomaterials. An amorphous carbon film with a small hole in its center was used to control the phase of incident electron waves, and the phase-contrast transfer function (PCTF) was modified from sine-type to cosine-type...
July 4, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28685414/cervical-chondrocutaneous-branchial-remnants
#10
Daniel T Ginat, Daniel N Johnson, Andrea Shogan, Nicole A Cipriani
Cervical chondrocutaneous branchial remnants are rare congenital choristomas. These lesions contain a cartilage core surrounded by skin with adnexal structures and subcutaneous fat. Correspondingly, on ultrasound there is a tubular hypoechoic core surrounded by hyperechoic, while on CT there is central intermediate attenuation surrounded by fat attenuation tissues. These features are exemplified in this sine qua non radiology-pathology correlation article. Management includes complete surgical resection and evaluating for potential associated anomalies, such as other branchial apparatus anomalies, as well as cardiac anomalies...
July 6, 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28681219/lash-a-review-of-the-current-literature
#11
REVIEW
William Kingston, Rashmi Halker
PURPOSE OF REVIEW: The purpose of this review is to evaluate and explain our current understanding of a very rare disorder, long-lasting autonomic symptoms with associated hemicranias (LASH). RECENT FINDINGS: At present, there are four known cases in the literature of LASH. Its characteristics and reported response to indomethacin link it most closely to the trigeminal autonomic cephalalgias (TACs). Its pathophysiology and epidemiology remain unclear. Variance in the pain and autonomic symptom relationship in the existing TAC literature along with the reports of TAC sine headache suggests that LASH may represent a far end of the spectrum of TACs, with most similarities to paroxysmal hemicrania (PH) and hemicrania continua (HC)...
August 2017: Current Pain and Headache Reports
https://www.readbyqxmd.com/read/28679842/the-firing-characteristics-of-foot-sole-cutaneous-mechanoreceptor-afferents-in-response-to-vibration-stimuli
#12
Nicholas Dj Strzalkowski, Ayesha Ali, Leah R Bent
Single unit microneurography was used to record the firing characteristics of the four classes of foot sole cutaneous afferents (fast and slowly adapting type I and II; FAI, FAII, SAI, SAII) in response to sinusoidal vibratory stimuli. Frequency (3-250Hz) and amplitude (0.001-2mm) combinations were applied to afferent receptive fields through a 6mm diameter probe. The impulses per cycle, defined as the number of action potentials evoked per vibration sine wave, were measured over one second of vibration at each frequency-amplitude combination tested...
July 5, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28679768/pd-1-%C3%A2-polyfunctional-t-cells-dominate-the-periphery-after-tumor-infiltrating-lymphocyte-therapy-for-cancer
#13
Marco Donia, Julie Westerlin Kjeldsen, Rikke Andersen, Marie Christine Wulff Westergaard, Valentina Bianchi, Mateusz Legut, Meriem Attaf, Barbara Szomolay, Sascha Ott, Garry Dolton, Rikke Lyngaa, Sine Reker Hadrup, Andrew K Sewell, Inge Marie Svane
Infusion of highly heterogeneous populations of autologous tumor-infiltrating lymphocytes (TILs) can result in tumor regression of exceptional duration. Initial tumor regression has been associated with persistence of tumor-specific TILs one month after infusion, but mechanisms leading to long-lived memory responses are currently unknown. Here we studied the dynamics of bulk tumor-reactive CD8(+) T cell populations in patients with metastatic melanoma following treatment with TILs. <p>Experimental Design: We analyzed the function and phenotype of tumor-reactive CD8(+) T cells contained in serial blood samples of sixteen patients treated with TILs</p> <p>Results: Polyfunctional tumor-reactive CD8(+) T cells accumulated over time in the peripheral lymphocyte pool...
July 5, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28676740/modulation-of-illusory-auditory-perception-by-transcranial-electrical-stimulation
#14
Giulia Prete, Anita D'Anselmo, Luca Tommasi, Alfredo Brancucci
The aim of the present study was to test whether transcranial electrical stimulation can modulate illusory perception in the auditory domain. In two separate experiments we applied transcranial Direct Current Stimulation (anodal/cathodal tDCS, 2 mA; N = 60) and high-frequency transcranial Random Noise Stimulation (hf-tRNS, 1.5 mA, offset 0; N = 45) on the temporal cortex during the presentation of the stimuli eliciting the Deutsch's illusion. The illusion arises when two sine tones spaced one octave apart (400 and 800 Hz) are presented dichotically in alternation, one in the left and the other in the right ear, so that when the right ear receives the high tone, the left ear receives the low tone, and vice versa...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28673770/alterations-of-the-nuclear-transport-system-in-hepatocellular-carcinoma-new-basis-for-therapeutic-strategies
#15
REVIEW
Martin Beck, Peter Schirmacher, Stephan Singer
Hepatocellular carcinoma (HCC) is among the most prevalent human malignancies world-wide with rising incidence in industrialized countries, few therapeutic options and poor prognosis. To expand and improve therapeutic strategies identification of drug targets ideally involved in several liver cancer relevant pathways appears mandatory. Virtually all signal transduction cascades cross the nuclear envelope and thereby require components of the nuclear transport system (NTS) including nuclear transport receptors (e...
June 30, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28670758/congenital-long-qt-syndrome-and-torsade-de-pointes
#16
REVIEW
Nabil El-Sherif, Gioia Turitto, Mohamed Boutjdir
Since its initial description by Jervell and Lange-Nielsen in 1957, the congenital long QT syndrome (LQTS) has been the most investigated cardiac ion channelopathy. A prolonged QT interval in the surface electrocardiogram is the sine qua non of the LQTS and is a surrogate measure of the ventricular action potential duration (APD). Congenital as well as acquired alterations in certain cardiac ion channels can affect their currents in such a way as to increase the APD and hence the QT interval. The inhomogeneous lengthening of the APD across the ventricular wall results in dispersion of APD...
July 2, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28668761/selinexor-overcomes-hypoxia-induced-drug-resistance-in-multiple-myeloma
#17
Barbara Muz, Feda Azab, Pilar de la Puente, Yosef Landesman, Abdel Kareem Azab
Increased levels of the nuclear export protein, exportin 1 (XPO1), were demonstrated in multiple myeloma (MM) patients. Targeting XPO1 with selinexor (the selective inhibitor of nuclear export; SINE compound KPT-330) demonstrates broad antitumor activity also in patient cells resistant to bortezomib; hence, it is a promising target in MM patients. Hypoxia is known to mediate tumor progression and drug resistance (including bortezomib resistance) in MM cells. In this study, we tested the effects of selinexor alone or in combination with bortezomib in normoxia and hypoxia on MM cell survival and apoptosis in vitro and in vivo...
June 29, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28668030/sine-squared-shifted-pulses-for-recoupling-interactions-in-solid-state-nmr
#18
Mukul G Jain, G Rajalakshmi, Asif Equbal, Kaustubh R Mote, Vipin Agarwal, P K Madhu
Rotational-Echo DOuble-Resonance (REDOR) is a versatile experiment for measuring internuclear distance between two heteronuclear spins in solid-state NMR. At slow to intermediate magic-angle spinning (MAS) frequencies, the measurement of distances between strongly coupled spins is challenging due to rapid dephasing of magnetisation. This problem can be remedied by employing the pulse-shifted version of REDOR known as Shifted-REDOR (S-REDOR) that scales down the recoupled dipolar coupling. In this study, we propose a new variant of the REDOR sequence where the positions of the π pulses are determined by a sine-squared function...
June 28, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28667980/noise-characterization-of-analog-to-digital-converters-for-amplitude-and-phase-noise-measurements
#19
A C Cárdenas-Olaya, E Rubiola, J-M Friedt, P-Y Bourgeois, M Ortolano, S Micalizio, C E Calosso
Improvements on electronic technology in recent years have allowed the application of digital techniques in phase noise metrology, where low noise and high accuracy are required, yielding flexibility in system implementation and setup. This results in measurement systems with extended capabilities, additional functionalities, and ease of use. In most digital schemes, the Analog to Digital Converters (ADCs) set the ultimate performance of the system; therefore the proper selection of this component is a critical issue...
June 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28667318/automatic-detection-of-galaxy-type-from-datasets-of-galaxies-image-based-on-image-retrieval-approach
#20
Mohamed Abd El Aziz, I M Selim, Shengwu Xiong
This paper presents a new approach for the automatic detection of galaxy morphology from datasets based on an image-retrieval approach. Currently, there are several classification methods proposed to detect galaxy types within an image. However, in some situations, the aim is not only to determine the type of galaxy within the queried image, but also to determine the most similar images for query image. Therefore, this paper proposes an image-retrieval method to detect the type of galaxies within an image and return with the most similar image...
June 30, 2017: Scientific Reports
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