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https://www.readbyqxmd.com/read/28535492/impact-of-substrate-concentration-on-anammox-ubf-reactors-start-up
#1
Yujie Qin, Bin Han, Yan Cao, Tongyu Wang
Two up-flow blanket filter (UBF) reactors were employed to treat synthetic wastewater with different substrate concentrations and nitrogen load rates (NLR) for 178days. During days 0-60, higher influent NLR of R2 (0.21-0.58kg·m(3)·d) slowed down the formation of anammox sludge compared with the lower NLR of R1 (0.18-0.31kg·m(3)·d). Difference in sludge color and nitrogen conversion rate indicated greater anammox activity of R2 than R1. During days 61-178, R1 and R2 achieved the maximum nitrogen removal rates (NRR) of 1...
May 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28533631/an-angstrom-sensitive-differential-mems-capacitor-for-monitoring-the-milliliter-dynamics-of-fluids
#2
David J Apigo, Philip L Bartholomew, Thomas Russell, Alokik Kanwal, Reginald C Farrow, Gordon A Thomas
A device, with MEMS sensors at its core, has been fabricated and tested for measuring low fluid pressure and slow flow rates. The motivation was to measure clinically relevant ranges of slow-moving fluids in living systems, such as the cerebrospinal fluid in the brain. For potential clinical utility, the device can be read transcutaneously by inductive coupling to MEMS capacitive sensors in circuits with resonance frequencies in the MHz range. Signal shifts for flow rates in the range of 0-42 mL/h and differential pressure levels between 0...
November 1, 2016: Sensors and Actuators. A, Physical
https://www.readbyqxmd.com/read/28530789/insight-into-charge-separation-in-wo3-bivo4-heterojunction-for-solar-water-splitting
#3
Sang Youn Chae, Chang Soo Lee, Hyejin Jung, Oh-Shim Joo, Byoung Koun Min, Jong Hak Kim, Yun Jeong Hwang
The WO3/BiVO4 heterojunction has shown promising photoelectrochemical (PEC) water splitting activity based on its charge transfer and light absorption capability, and notable enhancement of the photocurrent has been achieved via morphological modification of WO3. We developed a graft copolymer-assisted protocol for the synthesis of WO3 mesoporous thin films on a transparent conducting electrode, wherein the particle size, particle shape, and thickness of the WO3 layer were controlled by tuning the interactions in the polymer/sol-gel hybrid...
May 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28529701/recent-advances-in-the-management-of-dry-age-related-macular-degeneration-a-review
#4
REVIEW
Francesco Bandello, Riccardo Sacconi, Lea Querques, Eleonora Corbelli, Maria Vittoria Cicinelli, Giuseppe Querques
Age-related macular degeneration (AMD), the most important cause of vision loss in elderly people, is a degenerative disorder of the central retina with a multifactorial etiopathology. AMD is classified in dry AMD (d-AMD) or neovascular AMD depending on the presence of choroidal neovascularization. Currently, no therapy is approved for geographic atrophy, the late form of d-AMD, because no treatment can restore the damage of retinal pigment epithelium (RPE) or photoreceptors. For this reason, all treatment approaches in d-AMD are only likely to prevent and slow down the progression of existing atrophy...
2017: F1000Research
https://www.readbyqxmd.com/read/28527376/the-effectiveness-of-cutoff-walls-to-control-saltwater-intrusion-in-multi-layered-coastal-aquifers-experimental-and-numerical-study
#5
Antoifi Abdoulhalik, Ashraf A Ahmed
The objective of this study was to examine the performance of cutoff walls in controlling saltwater intrusion in stratified heterogeneous coastal aquifers. Numerical and laboratory experiments were completed in laboratory-scale aquifer where the effectiveness of cutoff walls was assessed in three different configurations, including a homogeneous scenario, a stratified aquifer with high K-low K-high K pattern (case HLH) and another stratified aquifer with low K-high K-low K pattern (case LHL). The results show that the cutoff wall was effective in reducing the saltwater wedge in all the investigated cases of layered-aquifers with toe length reduction of up to 43%...
May 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28521473/diagnostic-accuracies-of-endoscopic-ultrasound-guided-fine-needle-aspiration-with-distinct-negative-pressure-suction-techniques-in-solid-lesions-a-retrospective-study
#6
Ronghua Wang, Jinlin Wang, Yawen Li, Yaqi Duan, Xiaoli Wu, Bin Cheng
Endoscopic ultrasound (EUS)-guided fine-needle aspiration (EUS-FNA) is highly accurate in obtaining specific diagnoses for various diseases. The present study aimed to evaluate the diagnostic yields, accuracies and sampling adequacies, of slow-pull, 5 ml suction and 10 ml suction techniques in EUS-FNA of solid lesions. The present study was a retrospective comparative study, which was performed in tertiary academic centers, recognized for their expertise in EUS and EUS-guided FNA. The present study involved 149 patients who underwent EUS-FNA of solid masses...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28520734/interfacial-mechanisms-for-stability-of-surfactant-laden-films
#7
M Saad Bhamla, Chew Chai, Marco A Àlvarez-Valenzuela, Javier Tajuelo, Gerald G Fuller
Thin liquid films are central to everyday life. They are ubiquitous in modern technology (pharmaceuticals, coatings), consumer products (foams, emulsions) and also serve vital biological functions (tear film of the eye, pulmonary surfactants in the lung). A common feature in all these examples is the presence of surface-active molecules at the air-liquid interface. Though they form only molecular-thin layers, these surfactants produce complex surface stresses on the free surface, which have important consequences for the dynamics and stability of the underlying thin liquid film...
2017: PloS One
https://www.readbyqxmd.com/read/28520396/simultaneous-on-line-monitoring-of-multiple-reactions-using-a-miniature-mass-spectrometer
#8
Christopher J Pulliam, Ryan M Bain, Heather L Osswald, Dalton T Snyder, Patrick W Fedick, Stephen T Ayrton, Tawnya G Flick, R Graham Cooks
Advanced methods of chemical sampling using miniature mass spectrometer technology are applied to monitor slow reactions at a frequency of ca 180 hr-1. There is no detectable sample carryover and in-line derivatization is used in the case of poorly ionizing compounds. Moreover, we demonstrate high reproducibility with a relative error of less than 10% for major com-ponents. Monitoring is enabled using a continuous-flow nano-electrospray (CF-nESI) probe contained in a custom-built 3D-printed rotary holder. The holder position is automatically set using a stepper motor controlled by a microcontroller...
May 18, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28515113/force-sensing-catheters-during-pediatric-radiofrequency-ablation-the-federation-study
#9
Aarti S Dalal, Hoang H Nguyen, Tammy Bowman, George F Van Hare, Jennifer N Avari Silva
BACKGROUND: Based on data from studies of atrial fibrillation ablations, optimal parameters for the TactiCath (TC; St. Jude Medical, Inc) force-sensing ablation catheter are a contact force of 20 g and a force-time integral of 400 g·s for the creation of transmural lesions. We aimed to evaluate TC in pediatric and congenital heart disease patients undergoing ablation. METHODS AND RESULTS: Comprehensive chart and case reviews were performed from June 2015 to March 2016...
May 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28514296/clinicopathological-features-and-differential-diagnosis-of-aggressive-angiomyxoma-of-the-female-pelvis-5-case-reports-and-literature-review
#10
Hong Chen, Hongyan Zhao, Yan Xie, Mulan Jin
Aggressive angiomyxoma (AAM) is a rare mesenchymal tumor that usually occurs in the pelvis and perineum of young females. AAM can simulate Bartholin's gland cyst, abscess, lipoma, simple labial cyst, or other pelvic soft tissue tumors. Here we present five cases of AAM with mean age of 42. The patients mainly presented slow-growing mass in the abdomen and perineum (3 cases in the pelvis, 1 in the vulva, and 1 in the buttock). Color Doppler flow imaging revealed blood flow for the 3 pelvic lesions. Enhanced computed tomography and magnetic resonance imaging of the other 2 cases showed the typical "swirled" or "layered" structure characteristic...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28512401/increased-gamma-connectivity-in-the-human-prefrontal-cortex-during-the-bereitschaftspotential
#11
Kisun Kim, June Sic Kim, Chun Kee Chung
The Bereitschaftspotential (BP) is a slow negative cortical potential preceding voluntary movement. Since movement preparation is dependent upon the synchronous activity of a variety of neurons, BP may develop through the exchange of information among motor-related neurons. However, the relationship between BP and information flow is not yet well-known. In the present study, we aimed to investigate how the connectivity in the prefrontal cortex (PFC) changes during the occurrence of BP. Electrocorticography (ECoG) was recorded in five patients with epilepsy...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28511227/tenosynovitis-evaluation-using-image-fusion-and-b-flow-a-pilot-study-on-new-imaging-techniques-in-rheumatoid-arthritis-patients
#12
Mads Ammitzbøll-Danielsen, Daniel Glinatsi, Søren Torp-Pedersen, Jacob M Møller, Esperanza Naredo, Mikkel Ostergaard, Lene Terslev
Aim The aim of this study was to compare the assessment of tenosynovitis by ultrasound (US) and magnetic resonance imaging (MRI) using the image fusion technique and to investigate whether US B-flow imaging (BFI) is an alternative to Doppler US when assessing tenosynovitis. Materials and Methods 15 patients with rheumatoid arthritis (RA) had US-verified tenosynovitis in the wrist/hand. An MRI was performed of the wrist/hand with subsequent repeated US and image fusion. Images were compared in three steps: 1...
May 16, 2017: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/28510344/harnessing-1-4-1-5-and-1-6-anionic-fries-type-rearrangements-by-reaction-time-control-in-flow
#13
Jun-Ichi Yoshida, Heejin Kim, Keita Inoue
A series of anionic Fries-type rearrangements of carbamoyl-substituted aryllithiums can be controlled by using flow microreactor systems. For [1,4]- and [1,5]-rearrangements, either the carbamoyl-maintained or migrated aryllithium intermediates can be subjected to the subsequent reactions with electrophiles at will based on precise residence time and the temperature (-25 oC to -50 oC) control. In contrast, the [1,6] -rearrangement is rather slow even at -25 oC. The absence of cross-over products indicates the intramolecular nature of the carbamoyl group migration...
May 16, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28508297/adaptation-to-stochastic-temporal-variations-in-intratumoral-blood-flow-the-warburg-effect-as-a-bet-hedging-strategy
#14
Curtis A Gravenmier, Miriam Siddique, Robert A Gatenby
While most cancers promote ingrowth of host blood vessels, the resulting vascular network usually fails to develop a mature organization, resulting in abnormal vascular dynamics with stochastic variations that include slowing, cessation, and even reversal of flow. Thus, substantial spatial and temporal variations in oxygen concentration are commonly observed in most cancers. Cancer cells, like all living systems, are subject to Darwinian dynamics such that their survival and proliferation are dependent on developing optimal phenotypic adaptations to local environmental conditions...
May 15, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28508133/children-and-adolescents-macrovascular-reactivity-level-and-dynamics-but-not-the-microvascular-response-is-associated-with-body-mass-index-and-arterial-stiffness-levels
#15
Yanina Zócalo, Marco Marotta, Victoria García-Espinosa, Santiago Curcio, Pedro Chiesa, Gustavo Giachetto, Daniel Bia
INTRODUCTION: The existing evidence indicates that primary prevention of atherosclerotic disease should begin in childhood. Detection of children and adolescents at risk for atherosclerosis may allow early intervention to decrease the atherosclerotic process, thereby preventing or delaying cardiovascular disease. Vascular reactivity (VR) is altered even by early atherosclerosis. Obesity is a main cardiovascular risk factor (CVRF) observed in childhood. If childhood obesity associates impaired macro and/or micro VR is controversial...
May 15, 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/28506629/hippocampal-information-processing-across-sleep-wake-cycles
#16
REVIEW
Kenji Mizuseki, Hiroyuki Miyawaki
According to a two-stage memory consolidation model, during waking theta states, afferent activity from the neocortex to the hippocampus induces transient synaptic modification in the hippocampus, where the information is deposited as a labile form of memory trace. During subsequent sharp-wave ripples (SPW-Rs), the newly acquired hippocampal information is transferred to the neocortex and stored as a long-lasting memory trace. Consistent with this hypothesis, waking theta states and SPW-Rs distinctly control information flow in the hippocampal-entorhinal loop...
May 12, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28502893/the-effect-of-exhalation-flow-on-endogenous-particle-emission-and-phospholipid-composition
#17
Per Larsson, Björn Bake, Anita Wallin, Oscar Hammar, Ann-Charlotte Almstrand, Mona Lärstad, Evert Ljungström, Ekaterina Mirgorodskaya, Anna-Carin Olin
Exhaled particles constitute a micro-sample of respiratory tract lining fluid. Inhalations from low lung volumes generate particles in small airways by the airway re-opening mechanism. Forced exhalations are assumed to generate particles in central airways by mechanisms associated with high air velocities. To increase knowledge on how and where particles are formed, different breathing manoeuvres were compared in 11 healthy volunteers. Particles in the 0.41-4.55μm diameter range were characterised and sampled...
May 11, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28501498/the-role-of-sleep-in-the-plasticity-of-the-olfactory-system
#18
REVIEW
Masahiro Yamaguchi
The central olfactory system mediates a variety of odor-guided behaviors crucial for maintenance of animal life. The olfactory neural circuit must be highly plastic to ensure that it responds appropriately to changing odor circumstances. Recent studies have revealed that the processing of odor information changes drastically during waking and sleep and that neural activity during sleep plays pivotal roles in the structural reorganization and functional plasticity of the olfactory system. While olfactory information from the external world is efficiently transferred to the olfactory cortex (OC) via the olfactory bulb (OB) during waking, this information flow is attenuated during slow-wave sleep: during slow-wave sleep, the OC neurons exhibit synchronous discharges without odor input under the entrainment of sharp waves in the local field potential recording...
May 10, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28501382/fabrication-of-biochars-obtained-from-valorization-of-biowaste-and-evaluation-of-its-physicochemical-properties
#19
Rumi Narzari, Neonjyoti Bordoloi, Banashree Sarma, Lina Gogoi, Nirmali Gogoi, Bikram Borkotoki, Rupam Kataki
This study investigated the yields and the physicochemical properties of biochar from three different feedstocks viz., i) bioenergy byproducts (deoiled cakes of Jatropha carcus and Pongamia glabra), ii) lignocellulose biomass (Jatropha carcus seed cover), and iii) a noxious weed (Parthenium hysterophorus), obtained through slow pyrolysis at a heating rate of 40°Cmin(-1) with a nitrogen flow 100mlmin(-1) at a temperature range of 350-650°C. For successful utilization of biochar for C-sequestration, its ability to resist abiotic or biotic degradation was deduced from recalcitrance index R50 by using TG analysis...
April 16, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28499755/biological-characteristics-and-karyotiping-of-a-new-isolation-method-for-human-adipose-mesenchymal-stem-cells-in-vitro
#20
Jun Li, Haisen Huang, Ximing Xu
OBJECTIVE: A new method was presented to prepare clinical-grade human adipose-derived stromal stem cells (ASCs) and its safety in vitro, such as biological characteristics and genetic features alteration were investigated. METHODS: The morphology of the ASCs which were cultured in vitro using serum-free medium was observed. Cell cycle and CD markers profile were tested by flow cytometry, while karyotype was analyzed by the chromosome G-banding technology. Growth factors expression was tested by ELISA and tumor-related genes were analyzed by the real-time PCR, respectively...
April 24, 2017: Tissue & Cell
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