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https://www.readbyqxmd.com/read/28926974/block-v-rtx-domain-of-adenylate-cyclase-from-bordetella-pertussis-a-conformationally-dynamic-scaffold-for-protein-engineering-applications
#1
REVIEW
Beyza Bulutoglu, Scott Banta
The isolated Block V repeats-in-toxin (RTX) peptide domain of adenylate cyclase (CyaA) from Bordetella pertussis reversibly folds into a β-roll secondary structure upon calcium binding. In this review, we discuss how the conformationally dynamic nature of the peptide is being engineered and employed as a switching mechanism to mediate different protein functions and protein-protein interactions. The peptide has been used as a scaffold for diverse applications including: a precipitation tag for bioseparations, a cross-linking domain for protein hydrogel formation and as an alternative scaffold for biomolecular recognition applications...
September 17, 2017: Toxins
https://www.readbyqxmd.com/read/28926363/blood-pressure-measurements-over-thin-and-thick-sleeves-in-the-frail-elderly
#2
Sachiko Ozone, Mikiya Sato, Ayumi Takayashiki, Takuya Sato, Aya Matsushita, Hisashi Yoshimoto, Tetsuhiro Maeno
OBJECTIVE: Blood pressure (BP) measurement is recommended on bare arms, but undressing the arms for BP measurements is often difficult for frail elderly individuals. We aimed to assess the accuracy of BP measurements over arms with thin and thick clothing among the frail elderly. PARTICIPANTS AND METHODS: This is a cross-sectional study. Individuals aged 65 years or older were recruited from three long-term care facilities in Japan between April and May 2016. The main outcome measures were BP measurements (a) on a bare arm, (b) over a thin shirt, (c) over a thin shirt and a cardigan, and (d) over the sleeve of a thin shirt and a cardigan rolled up to the elbow...
September 18, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28925979/a-new-quaternion-based-kalman-filter-for-real-time-attitude-estimation-using-the-two-step-geometrically-intuitive-correction-algorithm
#3
Kaiqiang Feng, Jie Li, Xiaoming Zhang, Chong Shen, Yu Bi, Tao Zheng, Jun Liu
In order to reduce the computational complexity, and improve the pitch/roll estimation accuracy of the low-cost attitude heading reference system (AHRS) under conditions of magnetic-distortion, a novel linear Kalman filter, suitable for nonlinear attitude estimation, is proposed in this paper. The new algorithm is the combination of two-step geometrically-intuitive correction (TGIC) and the Kalman filter. In the proposed algorithm, the sequential two-step geometrically-intuitive correction scheme is used to make the current estimation of pitch/roll immune to magnetic distortion...
September 19, 2017: Sensors
https://www.readbyqxmd.com/read/28922992/policy-maker-attitudes-to-the-ageing-of-the-hiv-cohort-in-botswana
#4
Kabo Matlho, Refelwetswe Lebelonyane, Tim Driscoll, Joel Negin
BACKGROUND: The roll out of antiretroviral therapy in Botswana, as in many countries with near universal access to treatment, has transformed HIV into a complex yet manageable chronic condition and has led to the emergence of a population aging with HIV. Although there has been some realization of this development at international level, no clear defined intervention strategy has been established in many highly affected countries. Therefore we explored attitudes of policy-makers and service providers towards HIV among older adults (50 years or older) in Botswana...
December 2017: SAHARA J: Journal of Social Aspects of HIV/AIDS Research Alliance
https://www.readbyqxmd.com/read/28922185/a-pilot-study-to-precisely-quantify-forces-applied-by-sonographers-while-scanning-a-step-toward-reducing-ergonomic-injury
#5
Manish Dhyani, Shawn C Roll, Matthew W Gilbertson, Melanie Orlowski, Arash Anvari, Qian Li, Brian Anthony, Anthony E Samir
BACKGROUND: There is a significantly high rate of work-related musculsokeletal injuries in sonography professionals. To date, assessment of risk factors for work- related injuries in sonographers has been based primarily on surveys, subjective reports, and observational methods. There is a need to develop quantitative techniques to better understand risk factors and develop preventive interventions. OBJECTIVE: We pilot tested a high-resolution force-measuring probe capable of precisely measuring forces applied through the transducer by sonographers and used this novel direct measurement technique to evaluate forces during abdominal imaging...
September 14, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/28919765/scopolamine-alleviates-involuntary-lingual-movements-tardive-dyskinesia-or-dystonia
#6
Jianbo Hu, Jianbo Lai, Shaohua Hu, Yi Xu
Cholinergic hypofunction was believed to be associated with the pathogenesis of tardive dyskinesia, and therefore, anticholinergic treatment might exacerbate the condition. We describe herein a middle-aged male with feeble chewing movements, involuntary rolling motions of the tongue, and abnormally tightened cheeks which developed after consuming different psychotropic medications. These symptoms did not improve after routine treatment for tardive dyskinesia, but responded well to anticholinergic agents, such as scopolamine and benzhexol hydrochloride...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28919324/pretreatment-of-skin-using-an-abrasive-skin-preparation-pad-a-microneedling-device-or-iontophoresis-improves-absorption-of-methyl-aminolevulinate-in-ex-vivo-human-skin
#7
Hanan Osman-Ponchet, Alexandre Gaborit, Karine Sevin, Christophe Bianchi, Jean-Michel Linget, Claire E Wilson, Guy Bouvier
BACKGROUND: Pretreatment of skin to remove scales/crusts and roughen the surface is essential to enhance the penetration of topically applied methyl aminolevulinate (MAL) prior to photodynamic therapy and to permit daylight to access all parts of the skin lesions. Numerous procedures of skin preparation are currently available. This study compared the in vitro penetration of MAL into ex vivo human skin pretreated with skin preparation pad abrasion or a microneedling device, and evaluated the effectiveness of an iontophoretic device in delivering MAL into ex vivo human skin...
September 12, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28918084/uranium-isotopes-in-tree-bark-as-a-spatial-tracer-of-environmental-contamination-near-former-uranium-processing-facilities-in-southwest-ohio
#8
Elise Conte, Elisabeth Widom, David Kuentz
Inappropriate handling of radioactive waste at nuclear facilities can introduce non-natural uranium (U) into the environment via the air or groundwater, leading to anthropogenic increases in U concentrations. Uranium isotopic analyses of natural materials (e.g. soil, plants or water) provide a means to distinguish between natural and anthropogenic U in areas near sources of radionuclides to the environment. This study examines the utility of two different tree bark transects for resolving the areal extent of U atmospheric contamination using several locations in southwest Ohio that historically processed U...
September 14, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28917803/atp-mediated-rolling-circle-amplification-and-opening-dna-gate-for-drug-delivery-to-cell
#9
Yujie Wang, Xinxin Shang, Jia Liu, Yingshu Guo
Here, we have developed a facile fluorometric system for the detection of adenosine triphosphate (ATP) by a rolling circle amplification (RCA) based on proximity ligation mediated amplification, and simultaneously achieved the release of the anticancer drug doxorubicin (DOX) through the mesoporous silicon system. Once the ATP molecule is present, the linker DNA will be released from the graphene oxide (GO) surface and hybridized to the template DNA of the GO surface joining with ligation enzyme. RCA reaction is followed by the addition of the phi29 DNA polymerase...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28915502/to-stop-or-not-to-stop-contrasting-compliant-and-non-compliant-driver-behaviour-at-rural-rail-level-crossings
#10
Vanessa Beanland, Paul M Salmon, Ashleigh J Filtness, Michael G Lenné, Neville A Stanton
Many rail level crossings (RLXs) have only passive protection, such as static signs instructing road users to stop, yield, or look for trains. Stop signs have been suggested as a low-cost option to improve safety at passive RLXs, as requiring drivers to stop should encourage safe behaviour. However, field observations have noted high rates of non-compliance at stop-controlled RLXs. To explore this further, we conducted an on-road study to identify factors that influence compliance at stop-controlled RLXs. Twenty-two drivers drove a 30...
September 12, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28914951/plasmonic-color-metasurfaces-fabricated-by-a-high-speed-roll-to-roll-method
#11
Swathi Murthy, Henrik Pranov, Nikolaj A Feidenhans'l, Jonas S Madsen, Poul Erik Hansen, Henrik C Pedersen, Rafael Taboryski
Lab-scale plasmonic color printing using nano-structured and subsequently metallized surfaces have been demonstrated to provide vivid colors. However, upscaling these structures for large area manufacturing is extremely challenging due to the requirement of nanometer precision of metal thickness. In this study, we have investigated a plasmonic color meta-surface design that can be easily upscaled. We have demonstrated the feasibility of fabrication of these plasmonic color surfaces by a high-speed roll-to-roll method, comprising roll-to-roll extrusion coating at 10 m min(-1) creating a polymer foil having 100 nm deep pits of varying sub-wavelength diameter and pitch length...
September 15, 2017: Nanoscale
https://www.readbyqxmd.com/read/28914797/dynamic-recrystallization-of-the-constituent-%C3%AE-phase-and-mechanical-properties-of-ti-43al-9v-0-2y-alloy-sheet
#12
Yu Zhang, Xiaopeng Wang, Fantao Kong, Yuyong Chen
A crack-free Ti-43Al-9V-0.2Y alloy sheet was successfully fabricated via hot-pack rolling at 1200 °C. After hot-rolling, the β/γ lamellar microstructure of the as-forged TiAl alloy was completely converted into a homogeneous duplex microstructure with an average γ grain size of 10.5 μm. The dynamic recrystallization (DRX) of the γ phase was systematically investigated. A recrystallization fraction of 62.5% was obtained for the γ phase in the TiAl alloy sheet, when a threshold value of 0.8° was applied to the distribution of grain orientation spread (GOS) values...
September 15, 2017: Materials
https://www.readbyqxmd.com/read/28913561/conformational-rearrangement-of-1-2-d-gg-intrastrand-cis-diammineplatinum-crosslinked-dna-is-driven-by-counter-ion-penetration-within-the-minor-groove-of-the-modified-site
#13
Tsvetan G Gantchev, Peicho St Petkov, Darel J Hunting
The major structural aberrations of DNA induced by a cis-diammineplatinum (II) 1,2-d(GG) intrastrand cross-link (CPT) have been known for decades. To gain deeper insights into the structural dynamics of the sequence-dependent DNA distortions adjacent to the CPT adduct, we employed molecular modeling and molecular dynamics (MD) simulations. The structural dynamics of native (N-DNA) and cisPt 1,2-d(GG) crosslinked (CPT-DNA) in the form of symmetric 36 nt d(G2T15G*G*T15G2)●C2A15CCA15C2) oligonucleotide duplexes is compared...
September 14, 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28912884/towards-translational-immunopet-mr-imaging-of-invasive-pulmonary-aspergillosis-the-humanised-monoclonal-antibody-jf5-detects-aspergillus-lung-infections-in-vivo
#14
Genna Davies, Anna-Maria Rolle, Andreas Maurer, Philipp R Spycher, Claudia Schillinger, Djamschid Solouk-Saran, Mike Hasenberg, Juliane Weski, Jesper Fonslet, Adrien Dubois, Frederic Boschetti, Franck Denat, Matthias Gunzer, Martin Eichner, Lauren S Ryder, Mikael Jensen, Roger Schibli, Bernd J Pichler, Stefan Wiehr, Christopher R Thornton
Invasive pulmonary aspergillosis (IPA) is a life-threatening lung disease of hematological malignancy or bone marrow transplant patients caused by the ubiquitous environmental fungus Aspergillus fumigatus. Current diagnostic tests for the disease lack sensitivity as well as specificity, and culture of the fungus from invasive lung biopsy, considered the gold standard for IPA detection, is slow and often not possible in critically ill patients. In a previous study, we reported the development of a novel non-invasive procedure for IPA diagnosis based on antibody-guided positron emission tomography and magnetic resonance imaging (immunoPET/MRI) using a [(64)Cu]DOTA-labeled mouse monoclonal antibody (mAb), mJF5, specific to Aspergillus...
2017: Theranostics
https://www.readbyqxmd.com/read/28911016/quantifying-rooting-at-depth-in-a-wheat-doubled-haploid-population-with-introgression-from-wild-emmer
#15
Christina K Clarke, Peter J Gregory, Martin Lukac, Amanda J Burridge, Alexandra M Allen, Keith J Edwards, Mike J Gooding
Background and Aims: The genetic basis of increased rooting below the plough layer, post-anthesis in the field, of an elite wheat line (Triticum aestivum 'Shamrock') with recent introgression from wild emmer (T. dicoccoides), is investigated. Shamrock has a non-glaucous canopy phenotype mapped to the short arm of chromosome 2B (2BS), derived from the wild emmer. A secondary aim was to determine whether genetic effects found in the field could have been predicted by other assessment methods...
September 1, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28910559/the-impact-of-fda-regulatory-activities-on-incident-dispensing-of-laba-containing-medication-2005-2011
#16
Meghan A Baker, Melissa G Butler, Sally Seymour, Fang Zhang, Yute Wu, Ann Chen Wu, Mark S Levenson, Pingsheng Wu, Aarthi Iyer, Sengwee Toh, Solomon Iyasu, Esther H Zhou
BACKGROUND: Evidence of safety issues associated with long-acting beta2-agonist (LABA) treatment has led to multiple regulatory activities by the U.S. Food and Drug Administration (FDA) on this class of medications. OBJECTIVE: This study describes the impact of the regulatory activities on incident LABA-containing medication dispensing. METHODS: A monthly rolling cohort of asthma patients who were eligible to initiate a LABA-containing product was created in the Mini-Sentinel Distributed Database between January 2005 and June 2011...
September 14, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28905712/evaluation-of-traditional-and-contemporary-methods-for-detecting-syphacia-obvelata-and-aspiculuris-tetraptera-in-laboratory-mice
#17
Philip M Gerwin, Rodolfo J Ricart Arbona, Elyn R Riedel, Michelle L Lepherd, Ken S Henderson, Neil S Lipman
There is no consensus regarding the best practice for detecting murine pinworm infections. Initially, we evaluated 7 fecal concentration methods by using feces containing Aspiculuris tetraptera (AT) eggs (n = 20 samples per method). Sodium nitrate flotation, sodium nitrate centrifugation, Sheather sugar centrifugation, and zinc sulfate centrifugation detected eggs in 100% of samples; zinc sulfate flotation and water sedimentation detected eggs in 90%. All had better detection rates than Sheather sugar flotation (50%)...
January 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28904802/analytical-study-of-226-ra-activity-concentration-in-market-consuming-foodstuffs-of-ramsar-iran
#18
M Gooniband Shooshtari, M R Deevband, M R Kardan, N Fathabadi, A A Salehi, K Naddafi, M Yunesian, R Nabizadeh Nodehi, M Karimi, S S Hosseini
BACKGROUND: Ramsar, a city of Iran located on the coast of the Caspian Sea, has been considered to be enormously important due to its high natural radioactivity levels. People living in High Level Natural Radiation Areas (HLNRAs) have been exposed by several sources, one of which could be foodstuff. However, many studies have been carried out to measure the environmental radioactivity in Ramsar, but no survey has been conducted in all stapled consumed foods yet. This study was dedicated to determine (226)Ra activity concentration in the daily diets of Ramsar residents as a probable exposure...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/28904643/rolling-circle-mutagenesis-of-gst-mcherry-to-understand-mutation-gene-expression-and-regulation
#19
Jessica Cole, Amanda Ferguson, Verónica A Segarra, Susan Walsh
Undergraduates are often familiar with textbook examples of human mutations that affect coding regions and the subsequent disorders, but they may struggle with understanding the implications of mutations in the regulatory regions of genes. We have designed a laboratory sequence that will allow students to explore the effect random mutagenesis can have on protein function, expression, and ultimately phenotype. Students design and perform a safe and time-efficient random mutagenesis experiment using error-prone rolling circular amplification of a plasmid expressing the inducible fusion protein glutathione S-transferase (GST)-mCherry...
2017: Journal of Microbiology & Biology Education: JMBE
https://www.readbyqxmd.com/read/28902990/high-purity-semiconducting-single-walled-carbon-nanotubes-a-key-enabling-material-in-emerging-electronics
#20
Jacques Lefebvre, Jianfu Ding, Zhao Li, Paul Finnie, Gregory Lopinski, Patrick R L Malenfant
Semiconducting single-walled carbon nanotubes (sc-SWCNTs) are emerging as a promising material for high-performance, high-density devices as well as low-cost, large-area macroelectronics produced via additive manufacturing methods such as roll-to-roll printing. Proof-of-concept demonstrations have indicated the potential of sc-SWCNTs for digital electronics, radiofrequency circuits, radiation hard memory, improved sensors, and flexible, stretchable, conformable electronics. Advances toward commercial applications bring numerous opportunities in SWCNT materials development and characterization as well as fabrication processes and printing technologies...
September 13, 2017: Accounts of Chemical Research
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