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https://www.readbyqxmd.com/read/28743156/components-of-mesophyll-resistance-and-their-environmental-responses-a-theoretical-modeling-analysis
#1
Yi Xiao, Xin-Guang Zhu
Mesophyll resistance (rm ), together with stomatal resistance and biochemical limitations, are recognized as three critical factors limiting leaf photosynthesis. Contrary to the expectation of being a constant, rm not only varies with light and CO2 conditions but also shows different responses among species. To elucidate the mechanistic basis of these responses, we derived an analytical model of rm , which incorporates various anatomical and biochemical factors including permeabilities of cell wall and chloroplast envelope to CO2 and HCO3(-) , carbonic anhydrase activities in cytosol and stroma, Rubisco activities, and relative location of mitochondria and chloroplast...
July 25, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28743094/a-personalized-medicine-approach-to-the-design-of-dry-powder-inhalers-selecting-the-optimal-amount-of-bypass
#2
Thomas Kopsch, Darragh Murnane, Digby Symons
In dry powder inhalers (DPIs) the patient's inhalation manoeuvre strongly influences the release of drug. Drug release from a DPI may also be influenced by the size of any air bypass incorporated in the device. If the amount of bypass is high less air flows through the entrainment geometry and the release rate is lower. In this study we propose to reduce the intra- and inter-patient variations of drug release by controlling the amount of air bypass in a DPI. A fast computational method is proposed that can predict how much bypass is needed for a specified drug delivery rate for a particular patient...
July 22, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28743055/the-influence-of-viscous-and-conducting-liquid-on-the-characteristics-of-the-slot-acoustic-wave
#3
I A Borodina, B D Zaitsev, A A Teplykh
The influence of the liquid with the different values of conductivity, permittivity, and viscosity on the characteristics of the slot mode in the structure consisting of delay line with propagating shear - horizontal acoustic wave of zero order (SH0) and upper piezoelectric plate separated by the air gap was experimentally investigated. The delay line made of the Y-X lithium niobate plate 0.2mm thick contained two interdigital transducers for the excitation and reception of acoustic wave in the frequency range of 2...
July 18, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28743048/the-ketogenic-diet-in-patients-with-myoclonic-status-in-non-progressive-encephalopathy
#4
Roberto Caraballo, Francesca Darra, Gabriela Reyes, Marisa Armeno, Araceli Cresta, Graciela Mestre, Bernardo Dalla Bernardina
Myoclonic status in non-progressive encephalopathy (MSNPE) is characterized by the recurrence of long-lasting atypical status epilepticus associated with attention impairment and continuous polymorphous jerks, mixed with other complex abnormal movements, in infants suffering from a non-progressive encephalopathy. The ketogenic diet (KD) has been used as an alternative to antiepileptic drugs (AEDs) for patients with refractory epileptic encephalopathies. PURPOSE: In this study we assess the efficacy and tolerability of the KD in patients with MSNPE...
July 11, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28743045/wind-friction-parametrisation-used-in-emission-models-for-wastewater-treatment-plants-a-critical-review
#5
REVIEW
Ademir A Prata, Jane M Santos, Victoria Timchenko, Neyval C Reis, Richard M Stuetz
Emission models are widely applied tools for estimating atmospheric emissions from wastewater treatment plants (WWTPs). The friction velocity u∗ is a key variable for the modelling of emissions from passive liquid surfaces in WWTPs. This work evaluated different parametrisations of u∗ for passive liquid surfaces at the scale of WWTP units, which present relatively small fetches, based on available wind friction and wave data measured at wind-wave tanks (fetches spanning from approximately 3 to 100 m, and wind speeds from 2 to 17 m s(-1))...
July 17, 2017: Water Research
https://www.readbyqxmd.com/read/28742947/dendritic-hematite-nanoarray-photoanode-modified-by-conformal-titanium-dioxide-interlayer-for-effective-charge-collection
#6
Jinlong Gong, Zhibin Luo, Tuo Wang, Jijie Zhang, Chengcheng Li, Huimin Li
This paper describes the introduction of a thin titanium dioxide interlayer that serves as passivation layer and dopant source for hematite (α-Fe2O3) nanoarray photoanode. This interlayer is demonstrated to boost the photocurrent by suppressing the substrate/hematite interfacial charge recombination, and increase the electrical conductivity by enabling Ti4+ incorporation. A dendritic nanostructure of this photoanode with enhanced solid-liquid junction area further improves to the surface charge collection efficiency, generating a photocurrent of ~2...
July 25, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28742775/estimation-of-stroke-volume-and-stroke-volume-changes-by-electrical-impedance-tomography
#7
Fernando José da Silva Ramos, André Hovnanian, Rogério Souza, Luciano C P Azevedo, Marcelo B P Amato, Eduardo L V Costa
BACKGROUND: Electrical impedance tomography (EIT) is a noninvasive imaging method that identifies changes in air and blood volume based on thoracic impedance changes. Recently, there has been growing interest in EIT to measure stroke volume (SV). The objectives of this study are as follows: (1) to evaluate the ability of systolic impedance variations (ΔZsys) to track changes in SV in relation to a baseline condition; (2) to assess the relationship of ΔZsys and SV in experimental subjects; and (3) to identify the influence of body dimensions on the relationship between ΔZsys and SV...
July 24, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28742630/unique-case-of-hearing-recovery-after-otic-capsule-destruction-and-complete-sensorineural-hearing-loss-caused-by-langerhans-cell-histiocytosis
#8
Jennifer A Losie, Michael Yong, Frederick K Kozak, Neil K Chadha
: A 14-year-old woman presented with right-sided otologic and vestibular symptoms after presenting with hormonal disturbances earlier that year. Imaging showed a gross destruction of the temporal bone, mastoid air cells, and external acoustic meatus with invasion into the otic capsule. The patient experienced complete sensorineural hearing loss in the right ear. Biopsy diagnosed Langerhans cell histiocytosis (LCH) and the patient was treated with chemotherapy. After 1 year of treatment, the patient's hearing partially recovered and imaging showed reconstitution of the temporal bone including the otic capsule...
July 24, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28742620/comparison-of-5-sulfur-hexafluoride-versus-100-air-tamponade-in-descemet-membrane-endothelial-keratoplasty
#9
Paraskevas Ampazas, Konstantinos Droutsas, Eleftherios Giallouros, Frank M Schroeder, Walter Sekundo
PURPOSE: To compare the rebubbling rate and clinical outcomes of Descemet membrane endothelial keratoplasty (DMEK) with 5% sulfur hexafluoride (SF6) gas versus 100% air as a tamponade for graft attachment. METHODS: Retrospective, comparative, interventional case series including 368 consecutive pseudophakic eyes with Fuchs endothelial dystrophy or pseudophakic bullous keratopathy that underwent DMEK in a tertiary referral center between October 2010 and August 2015 using either air (group 1, 191 eyes) or 5% SF6 (group 2, 177 eyes) as a tamponade...
July 24, 2017: Cornea
https://www.readbyqxmd.com/read/28742424/evaluation-of-noise-exposure-secondary-to-wind-noise-in-cyclists
#10
Michael D Seidman, Anna G Wertz, Matthew M Smith, Steve Jacob, Syed F Ahsan
Objective Determine if the noise levels of wind exposure experienced by cyclists reach levels that could contribute to noise-induced hearing loss. Study Design Industrial lab research. Setting Industrial wind tunnel. Subjects and Methods A commercial-grade electric wind tunnel was used to simulate different speeds encountered by a cyclist. A single cyclist was used during the simulation for audiometric measurements. Microphones attached near the ears of the cyclist were used to measure the sound (dB sound pressure level) experienced by the cyclist...
July 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28742415/air-and-dust-borne-fungi-in-indoor-and-outdoor-home-of-allergic-patients-in-a-dust-storm-affected-area
#11
Elham Shabankarehfard, Afshin Ostovar, Shokrollah Farrokhi, Behrouz Naeimi, Sasan Zaeri, Shahrokh Nazmara, Mozhgan Keshtkar, Farzaneh Sadeghzadeh, Sina Dobaradaran
Despite the recent increases in fungi-induced allergic diseases, there is no report yet in the region of the Persian Gulf on concentration levels of fungi in relationship with health state. Therefore, our aim was to measure fungi prevalence as well as to evaluate the relationships between air- and dust-borne fungal genera and allergic diseases. A matched case-control study was carried out including 45 allergic cases and 45 age- and gender-matched controls for each individual. Indoor and outdoor dust and indoor air samples were collected from participant homes during May to October 2015...
July 25, 2017: Immunological Investigations
https://www.readbyqxmd.com/read/28742382/occurrence-and-antibiotic-susceptibility-of-listeria-species-and-staphylococcus-aureus-in-cattle-slaughterhouses-of-kerala-south-india
#12
Tanuja K G M Gowda, Latha C, Sunil B, Inge Van Damme
A total of 765 samples were collected from beef carcasses, knives, cutting table surfaces, beef, hands, air, and water from four cattle slaughterhouses of Kerala, South India, to determine the occurrence and antibiotic susceptibility of Listeria species and Staphylococcus aureus. Listeria spp. were isolated from beef carcasses (2.0%), knives (3.7%), cutting table surfaces (1.9%), beef (0.7%), and water (1.3%). The identified species were Listeria monocytogenes (0.1%), Listeria innocua (0.9%), and Listeria ivanovii (0...
July 25, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28742305/pediatric-heat-related-illness-recommendations-for-prevention-and-management
#13
Roberta J. Dunn, Tommy Y. Kim
Infants, children, and adolescents are at increased risk for heat-related illness due to their inability to remove themselves from dangerous environments. Evidence shows that morbidity and mortality from heat illness is related to the length of time core temperature is elevated, so rapid reduction and accurate serial measurements are crucial to prevention of organ system damage and death. The primary methods of patient cooling are conduction (ice-water immersion, cold packs) and convection (moisture and moving air)...
August 2017: Pediatric Emergency Medicine Practice
https://www.readbyqxmd.com/read/28742162/trajectories-of-anxiety-and-health-related-quality-of-life-during-pregnancy
#14
K Oliver Schubert, Tracy Air, Scott R Clark, Luke E Grzeskowiak, Edward Miller, Gustaaf A Dekker, Bernhard T Baune, Vicki L Clifton
Anxiety and health related Quality of Life (HRQoL) have emerged as important mental health measures in obstetric care. Few studies have systematically examined the longitudinal trajectories of anxiety and HRQoL in pregnancy. Using a linear growth modeling strategy, we analyzed the course of State-Trait Anxiety Inventory (STAI)- and Short Form (36) Health Survey (SF-36) scores between the 12th and the 36th week of gestation, in a sample of 355 women. We additionally analyzed the impact of depressive symptoms and a chronic medical condition (asthma), on STAI and SF-36 trajectory curves...
2017: PloS One
https://www.readbyqxmd.com/read/28742066/a-comprehensive-data-set-of-lake-surface-water-temperature-over-the-tibetan-plateau-derived-from-modis-lst-products-2001-2015
#15
Wei Wan, Huan Li, Hongjie Xie, Yang Hong, Di Long, Limin Zhao, Zhongying Han, Yaokui Cui, Baojian Liu, Cunguang Wang, Wenting Yang
Lake surface water temperature (LSWT) is sensitive to long-term changes in thermal structure of lakes and regional air temperature. In the context of global climate change, recent studies showed a significant warming trend of LSWT based on investigating 291 lakes (71% are large lakes, ≥50 km(2) each) globally. However, further efforts are needed to examine variation in LSWT at finer regional spatial and temporal scales. The Tibetan Plateau (TP), known as 'the Roof of the World' and 'Asia's water towers', exerts large influences on and is sensitive to regional and even global climates...
July 25, 2017: Scientific Data
https://www.readbyqxmd.com/read/28742026/aire-is-a-critical-spindle-associated-protein-in-embryonic-stem-cells
#16
Bin Gu, Jean-Philippe Lambert, Katie Cockburn, Anne-Claude Gingras, Janet Rossant
Embryonic stem (ES) cells go though embryo-like cell cycles regulated by specialized molecular mechanisms. However, it is not known whether there are ES cell-specific mechanisms regulating mitotic fidelity. Here we showed that Autoimmune Regulator (Aire), a transcription coordinator involved in immune tolerance processes, is a critical spindle-associated protein in mouse ES(mES) cells. BioID analysis showed that AIRE associates with spindle-associated proteins in mES cells. Loss of function analysis revealed that Aire was important for centrosome number regulation and spindle pole integrity specifically in mES cells...
July 25, 2017: ELife
https://www.readbyqxmd.com/read/28741972/the-effect-of-zirconium-doping-of-cerium-dioxide-nanoparticles-on-pulmonary-and-cardiovascular-toxicity-and-biodistribution-in-mice-after-inhalation
#17
Susan Dekkers, Mark R Miller, Roel P F Schins, Isabella Römer, Mike Russ, Rob J Vandebriel, Iseult Lynch, Marie-France Belinga-Desaunay, Eugenia Valsami-Jones, Shea P Connell, Ian P Smith, Rodger Duffin, John A F Boere, Harm J Heusinkveld, Catrin Albrecht, Wim H de Jong, Flemming R Cassee
Development and manufacture of nanomaterials is growing at an exponential rate, despite an incomplete understanding of how their physicochemical characteristics affect their potential toxicity. Redox activity has been suggested to be an important physicochemical property of nanomaterials to predict their biological activity. This study assessed the influence of redox activity by modification of cerium dioxide nanoparticles (CeO2 NPs) via zirconium (Zr) doping on the biodistribution, pulmonary and cardiovascular effects in mice following inhalation...
July 25, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28741958/observing-imperfection-in-atomic-interfaces-for-van-der-waals-heterostructures
#18
Aidan P Rooney, Aleksey Kozikov, Alexander N Rudenko, Eric Prestat, Matthew J Hamer, Freddie Withers, Yang Cao, Kostya S Novoselov, Mikhail I Katsnelson, Roman Vladislavovich Gorbachev, Sarah J Haigh
Vertically stacked van der Waals heterostructures are a lucrative platform for exploring the rich electronic and optoelectronic phenomena in two-dimensional materials. Their performance will be strongly affected by impurities and defects at the interfaces. Here we present the firstsystematic study of interfaces in van der Waals heterostructure using cross sectional scanning transmission electron microscope (STEM) imaging. By measuring interlayer separations and comparing these to density functional theory (DFT) calculations we find that pristine interfaces exist between hBN and MoS2 or WS2 for stacks prepared by mechanical exfoliation in air...
July 25, 2017: Nano Letters
https://www.readbyqxmd.com/read/28741933/functionalized-cobalt-triarylcorrole-covalently-bonded-with-graphene-oxide-a-selective-catalyst-for-the-two-or-four-electron-reduction-of-oxygen
#19
Jijun Tang, Zhongping Ou, Rui Guo, Yuanyuan Fang, Dong Huang, Jing Zhang, Jiaoxia Zhang, Song Guo, Frederick M McFarland, Karl M Kadish
A cobalt triphenylcorrole (CorCo) was covalently bonded to graphene oxide (GO), and the resulting product, represented as GO-CorCo, was characterized by UV-vis, FT-IR, and micro-Raman spectroscopy as well as by HRTEM, TGA, XRD, XPS, and AFM. The electrocatalytic activity of GO-CorCo toward the oxygen reduction reaction (ORR) was then examined in air-saturated 0.1 M KOH and 0.5 M H2SO4 solutions by cyclic voltammetry and linear sweep voltammetry using a rotating disk electrode and/or a rotating ring-disk electrode...
July 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28741895/a-doubly-boron-doped-perylene-by-n-heterocylic-carbene-borenium-hydroboration-c-h-borylation-dehydrogenation
#20
Jeffrey M Farrell, David Schmidt, Vincenzo Grande, Frank Würthner
Reaction of an N-heterocyclic carbene (NHC)-borenium ion with 9,10-distyrylanthracene forms four B-C bonds through two selective, tandem hydroboration-electrophilic C-H borylations to yield an isolable, crystallographically characterizable polycyclic diborenium ion as its [NTf2]- salt (1). Dehydrogenation of 1 with TEMPO radical followed by acidic workup yields a 3,9-diboraperylene as its corresponding borinic acid (2). This sequence can be performed in one pot to allow the facile, metal-free conversion of an alkene to a small molecule containing a boron-doped graphene substructure...
July 25, 2017: Angewandte Chemie
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