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https://www.readbyqxmd.com/read/29351556/testosterone-induced-benign-prostatic-hyperplasia-rat-and-dog-as-facile-models-to-assess-drugs-targeting-lower-urinary-tract-symptoms
#1
Jing Li, Yanxin Tian, Shimeng Guo, Haifeng Gu, Qianting Yuan, Xin Xie
Benign prostatic hyperplasia (BPH) is an age-related disease, affecting a majority of elderly men worldwide. Medical management of BPH is an alternative to surgical treatment of this disease. Currently, α1-adrenergic receptor (α1-AR) antagonists are among the first line drugs to treat BPH by reducing the tension of urinary track and thus the obstructive symptoms in voiding. In drug development, old male dogs with spontaneous BPH are considered the golden standard of the animal models. However, old dogs (>6 years) are expensive and not all old dogs develop BPH...
2018: PloS One
https://www.readbyqxmd.com/read/29350608/acute-transverse-myelitis-following-scrub-typhus-a-case-report-and-review-of-the-literature
#2
Hyun-Seung Ryu, Bong Ju Moon, Jae-Young Park, Sang-Deok Kim, Seung-Kwon Seo, Jung-Kil Lee
Context Scrub typhus is an acute febrile disease caused by Orientia tsutsugamushi. The disease can usually involve the lungs, heart, liver, spleen and brain through hematogenous dissemination. However, very rarely, acute transverse myelitis in the spinal cord develops from scrub typhus. We present a case of acute transverse myelitis following scrub typhus with a review of the literature. Findings A 66-year-old male visited a hospital for general myalgia, mild headache, and fever in October. He was noted to have thick, black papule skin on his abdomen, which was highly suggestive of scrub typhus...
January 19, 2018: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29347643/nonhelical-turbulence-and-the-inverse-transfer-of-energy-a-parameter-study
#3
Johannes Reppin, Robi Banerjee
We explore the phenomenon of the recently discovered inverse transfer of energy from small to large scales in decaying magnetohydrodynamical turbulence by Brandenburg et al. [Phys. Rev. Lett. 114, 075001 (2015)PRLTAO0031-900710.1103/PhysRevLett.114.075001], even for nonhelical magnetic fields. For this investigation we mainly employ the Pencil Code performing a parameter study, where we vary the Prandtl number, the kinematic viscosity, and the initial spectrum. We find that to get a decay that exhibits this inverse transfer, large Reynolds numbers (O∼10^{3}) are needed and low Prandtl numbers of the order unity Pr=1 are preferred...
November 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347592/diffusion-subdiffusion-and-localization-of-active-colloids-in-random-post-lattices
#4
Alexandre Morin, David Lopes Cardozo, Vijayakumar Chikkadi, Denis Bartolo
Combining experiments and theory, we address the dynamics of self-propelled particles in crowded environments. We first demonstrate that motile colloids cruising at constant speed through random lattices undergo a smooth transition from diffusive to subdiffusive to localized dynamics upon increasing the obstacle density. We then elucidate the nature of these transitions by performing extensive simulations constructed from a detailed analysis of the colloid-obstacle interactions. We evidence that repulsion at a distance and hard-core interactions both contribute to slowing down the long-time diffusion of the colloids...
October 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347591/reconstruction-of-three-dimensional-porous-media-using-generative-adversarial-neural-networks
#5
Lukas Mosser, Olivier Dubrule, Martin J Blunt
To evaluate the variability of multiphase flow properties of porous media at the pore scale, it is necessary to acquire a number of representative samples of the void-solid structure. While modern x-ray computer tomography has made it possible to extract three-dimensional images of the pore space, assessment of the variability in the inherent material properties is often experimentally not feasible. We present a method to reconstruct the solid-void structure of porous media by applying a generative neural network that allows an implicit description of the probability distribution represented by three-dimensional image data sets...
October 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347372/lattice-boltzmann-heat-transfer-model-for-permeable-voxels
#6
Gerald G Pereira, Bisheng Wu, Shakil Ahmed
We develop a gray-scale lattice Boltzmann (LB) model to study fluid flow combined with heat transfer for flow through porous media where voxels may be partially solid (or void). Heat transfer in rocks may lead to deformation, which in turn can modulate the fluid flow and so has significant contribution to rock permeability. The LB temperature field is compared to a finite difference solution of the continuum partial differential equations for fluid flow in a channel. Excellent quantitative agreement is found for both Poiseuille channel flow and Brinkman flow...
December 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347276/generalized-network-modeling-network-extraction-as-a-coarse-scale-discretization-of-the-void-space-of-porous-media
#7
Ali Q Raeini, Branko Bijeljic, Martin J Blunt
A generalized network extraction workflow is developed for parameterizing three-dimensional (3D) images of porous media. The aim of this workflow is to reduce the uncertainties in conventional network modeling predictions introduced due to the oversimplification of complex pore geometries encountered in natural porous media. The generalized network serves as a coarse discretization of the surface generated from a medial-axis transformation of the 3D image. This discretization divides the void space into individual pores and then subdivides each pore into sub-elements called half-throat connections...
July 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347136/linking-initial-microstructure-and-local-response-during-quasistatic-granular-compaction
#8
R C Hurley, J Lind, D C Pagan, M A Homel, M C Akin, E B Herbold
We performed experiments combining three-dimensional x-ray diffraction and x-ray computed tomography to explore the relationship between microstructure and local force and strain during quasistatic granular compaction. We found that initial void space around a grain and contact coordination number before compaction can be used to predict regions vulnerable to above-average local force and strain at later stages of compaction. We also found correlations between void space around a grain and coordination number, and between grain stress and maximum interparticle force, at all stages of compaction...
July 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347052/capacitively-coupled-rf-discharge-with-a-large-amount-of-microparticles-spatiotemporal-emission-pattern-and-microparticle-arrangement
#9
M Y Pustylnik, I L Semenov, E Zähringer, H M Thomas
The effect of micron-sized particles on a low-pressure capacitively coupled rf discharge is studied both experimentally and using numerical simulations. In the laboratory experiments, microparticle clouds occupying a considerable fraction of the discharge volume are supported against gravity with the help of the thermophoretic force. The spatiotemporally resolved optical emission measurements are performed with different arrangements of microparticles. The numerical simulations are carried out on the basis of a one-dimensional hybrid (fluid-kinetic) discharge model describing the interaction between plasma and microparticles in a self-consistent way...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29341652/cascade-of-magnetic-field-induced-lifshitz-transitions-in-the-ferromagnetic-kondo-lattice-material-ybni_-4-p_-2
#10
H Pfau, R Daou, S Friedemann, S Karbassi, S Ghannadzadeh, R Küchler, S Hamann, A Steppke, D Sun, M König, A P Mackenzie, K Kliemt, C Krellner, M Brando
A ferromagnetic quantum critical point is thought not to exist in two- and three-dimensional metallic systems yet is realized in the Kondo lattice compound YbNi_{4}(P,As)_{2}, possibly due to its one-dimensionality. It is crucial to investigate the dimensionality of the Fermi surface of YbNi_{4}P_{2} experimentally, but common probes such as angle-resolved photoemission spectroscopy and quantum oscillation measurements are lacking. Here, we study the magnetic-field dependence of transport and thermodynamic properties of YbNi_{4}P_{2}...
September 22, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341501/tadalafil-improves-symptoms-erectile-function-and-quality-of-life-in-patients-with-lower-urinary-tract-symptoms-suggestive-of-benign-prostatic-hyperplasia-kyu-pro-study
#11
Ryosuke Takahashi, Minoru Miyazato, Hisae Nishii, Yasuhiro Sumino, Kazuo Takayama, Masako Onzuka, Takuma Oshiro, Seiichi Saito, Naohiro Fujimoto, Hiromitsu Mimata, Masatoshi Eto
OBJECTIVES: Effect of tadalafil on lower urinary tract symptoms (LUTS), erectile function and quality of life (QoL) were prospectively evaluated in patients with benign prostatic hyperplasia (BPH) at multicenter. METHODS: Eligible men were ≥40 years who had no treatment with alpha-blocker for BPH, with total International Prostate Symptom Score (IPSS) ≥8, IPSS-QOL ≥2 and prostate volume ≥20 mL. Data were collected on age, body mass index (BMI), and prostate specific antigen (PSA)...
January 2018: Lower Urinary Tract Symptoms
https://www.readbyqxmd.com/read/29341202/risk-factors-for-stress-urinary-incontinence-recurrence-after-single-incision-sling
#12
Stefania Palmieri, Matteo Frigerio, Federico Spelzini, Stefano Manodoro, Rodolfo Milani
AIMS: The aim of the study was to identify in a pure stress urinary incontinence (SUI) population risk factors for recurrence after single-incision slings (SIS). METHODS: This retrospective study analyzed women with complaints of SUI symptoms and urodynamically proven SUI. Exclusion criteria were recurrent SUI, overactive bladder syndrome/detrusor overactivity, preoperative postvoid residual >100 mL, reduced urethral mobility (<10° at the Q-tip test), concomitant anterior prolapse >I stage and previous history of radical pelvic surgery...
January 17, 2018: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29340648/a-novel-strategy-for-quantifying-choriocapillaris-flow-voids-using-swept-source-oct-angiography
#13
Qinqin Zhang, Fang Zheng, Elie H Motulsky, Giovanni Gregori, Zhongdi Chu, Chieh-Li Chen, Chunxia Li, Luis de Sisternes, Mary Durbin, Philip J Rosenfeld, Ruikang K Wang
Purpose: To achieve reproducible imaging of the choriocapillaris and associated flow voids using swept-source OCT angiography (SS-OCTA). Methods: Subjects were enrolled and SS-OCTA was performed using the 3 × 3 mm scan pattern. Blood flow was identified using the complex optical microangiography (OMAG) algorithm. The choriocapillaris was defined as a slab from the outer boundary of Bruch's membrane (BM) to approximately 20 μm below BM. Compensation for the shadowing effect caused by the RPE and BM complex on the choriocapillaris angiogram was achieved by using the structural information from the same slab...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29339572/three-dimensional-cross-linking-composite-of-graphene-carbon-nanotube-and-si-nanoparticles-for-lithium-ion-batteries-anode
#14
Suyun Tian, Guannan Zhu, Yanping Tang, Xiaohua Xie, Qian Wang, Yufei Ma, Gu Qiao Ding, Xiaoming Xie
Various graphene-based Si nanocomposites have been reported to improve the performance of active materials in Li ion battery. However, these candidates still yield severe capacity fading due to the electrical disconnection and fracture caused by huge volume changes with extended cycles.Therefore, we design a novel three-dimensional cross-linking structure of graphene and single-wall carbon nanotube to encapsulate Si nanoparticles. The synthesized three-dimensional structure is ascribed to the excellent self-assembly of carbon nanotube with graphene oxide and a thermal treatment process at 900 ºC...
January 17, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29338314/inflammatory-cytokines-in-the-papillary-tips-and-urine-of-nephrolithiasis-patients
#15
Andrew Yang Sun, Bryan Hinck, Benjamin R Cohen, Karen Keslar, Robert L Fairchild, Manoj Monga
INTRODUCTION: Intrarenal inflammation has been implicated in the pathogenesis of nephrolithiasis, with prior work showing increased urine levels of IL-6, IL-8, and CCL-2 in stone patients. However, no studies have assessed for inflammation in the renal papillae. We sought to characterize novel papillary tip and urinary biomarkers in stone patients. METHODS: 92 patients with nephrolithiasis undergoing percutaneous nephrolithotomy were enrolled. Papillary tip biopsies, kidney urine, and bladder urine were collected, as well as voided urine from 8 healthy volunteers...
January 16, 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29336516/neglect-of-attention-to-reproductive-health-in-women-with-hiv-infection-contraceptive-use-and-unintended-pregnancies-in-the-swiss-hiv-cohort-study
#16
K Aebi-Popp, V Mercanti, C Voide, J Nemeth, A Cusini, B Jakopp, D Nicca, M Rasi, A Bruno, A Calmy, B Martinez de Tejada
OBJECTIVES: Women with HIV infection are mainly of reproductive age and need safe, effective and affordable contraception to avoid unintended pregnancies. The aim of this study was to evaluate contraceptive use and unintended pregnancies in this population in Switzerland. METHODS: A self-report anonymous questionnaire on contraceptive methods, adherence to them, and unintended pregnancies was completed by women included in the Swiss HIV Cohort Study (SHCS) between November 2013 and June 2014...
January 16, 2018: HIV Medicine
https://www.readbyqxmd.com/read/29336441/a-high-pressure-study-of-calmodulin-ligand-interactions-using-small-angle-x-ray-and-elastic-incoherent-neutron-scattering
#17
Süleyman Cinar, Samy Al-Ayoubi, Christian Sternemann, Judith Peters, Roland Winter, Claus Czeslik
Calmodulin (CaM) is a Ca2+ sensor and mediates Ca2+ signaling through binding of numerous target ligands. The binding of ligands by Ca2+-saturated CaM (holo-CaM) is governed by attractive hydrophobic and electrostatic interactions that are weakened under high pressure in aqueous solutions. Moreover, the potential formation of void volumes upon ligand binding creates a further source of pressure sensitivity. Hence, high pressure is a suitable thermodynamic variable to probe protein-ligand interactions. In this study, we compare the binding of two different ligands to holo-CaM as a function of pressure by using X-ray and neutron scattering techniques...
January 16, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29336347/electromigration-and-morphological-changes-in-ag-nanostructures
#18
Atasi Chatterjee, T Bai, Frederik Edler, Christoph Tegenkamp, Kirsten Weide-Zaage, Herbert Pfnür
Electromigration (EM) as a structuring tool was investigated in Ag nanowires (width 300 nm, thickness 25 nm) and partly in notched and bow-tie Ag structures on a Si(100) substrate in ultra-high vacuum (UHV) using a 4-tip scanning tunneling microscope (STM) in combination with a scanning electron microscope (SEM). From simulations of Ag nanowires we got estimates of temperature profiles, current density profiles, EM and thermal migration (TM) mass flux distributions within the nanowire induced by critical current densities of $10^{8}$ A/cm$^2$...
January 16, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29336157/glycerol-hydrogen-bonding-network-dominates-structure-and-collective-dynamics-in-a-deep-eutectic-solvent
#19
A Faraone, D V Wagle, G A Baker, E C Novak, M Ohl, D Reuter, P Lunkenheimer, A Loidl, E Mamontov
The deep eutectic solvent glyceline formed by choline chloride and glycerol in 1:2 molar ratio is much less viscous compared to glycerol, which facilitates its use in many applications where high viscosity is undesirable. Despite the large difference in viscosity, we have found that the structural network of glyceline is completely defined by its glycerol constituent, which exhibits complex microscopic dynamic behavior, as expected from a highly correlated hydrogen-bonding network. Choline ions occupy interstitial voids in the glycerol network and show little structural or dynamic correlations with glycerol molecules...
January 16, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29335585/robust-fabrication-of-thin-film-polyamide-tio2-nanocomposite-membranes-with-enhanced-thermal-stability-and-anti-biofouling-propensity
#20
Behnam Khorshidi, Ishita Biswas, Tanushree Ghosh, Thomas Thundat, Mohtada Sadrzadeh
The development of nano-enabled composite materials has led to a paradigm shift in the manufacture of high-performance nanocomposite membranes with enhanced permeation, thermo-mechanical, and antibacterial properties. The major challenges to the successful incorporation of nanoparticles (NPs) to polymer films are the severe aggregation of the NPs and the weak compatibility of NPs with polymers. These two phenomena lead to the formation of non-selective voids at the interface of the polymer and NPs, which adversely affect the separation performance of the membrane...
January 15, 2018: Scientific Reports
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