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https://www.readbyqxmd.com/read/28103592/influences-of-various-peptide-linkers-on-the-thermotoga-maritima-msb8-nitrilase-displayed-on-the-spore-surface-of-bacillus-subtilis
#1
Huayou Chen, Zhi Chen, Bangguo Wu, Jawad Ullah, Tianxi Zhang, Jinru Jia, Hongcheng Wang, Tianwei Tan
In the present study, fusion genes composed of Thermotoga maritima MSB8 nitrilase and Bacillus subtilis 168 outer coat protein CotG were constructed with various peptide linkers and displayed on B. subtilis DB 403 spores. The successful display of CotG-nit fusion proteins on the spore surface of B. subtilis was verified by Western blot analysis and activity measurement. It was demonstrated that the fusion with linker GGGGSEAAAKGGGGS presented the highest thermal and pH stability, which is 2.67- and 1.9-fold of the fusion without linker...
January 20, 2017: Journal of Molecular Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28103551/ultrasound-flow-mapping-for-the-investigation-of-crystal-growth
#2
Norman Thieme, Paul Bonisch, Dagmar Meier, Richard Nauber, Lars Buttner, Kaspars Dadzis, Olf Patzold, Lamine Sylla, Jurgen Czarske
A high energy conversion and cost efficiency are keys for the transition to renewable energy sources, e.g. solar cells. The efficiency of multi-crystalline solar cells can be improved by enhancing the understanding of its crystallization process, especially the directional solidification. In this paper, a novel measurement system for the characterization of flow phenomena and solidification processes in low-temperature model experiments on the basis of ultrasound Doppler velocimetry is described. It captures turbulent flow phenomena in two planes with a frame rate of 3...
January 16, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28103051/standoff-laser-induced-breakdown-spectroscopy-libs-using-a-miniature-wide-field-of-view-spatial-heterodyne-spectrometer-with-sub-microsteradian-collection-optics
#3
Patrick D Barnett, Nirmal Lamsal, S Michael Angel
A spatial heterodyne spectrometer (SHS) is described for standoff laser-induced breakdown spectroscopy (LIBS) measurements. The spatial heterodyne LIBS spectrometer (SHLS) is a diffraction grating based interferometer with no moving parts that offers a very large field of view, high light throughput, and high spectral resolution in a small package. The field of view of the SHLS spectrometer is shown to be ∼1° in standoff LIBS measurements. In the SHLS system described here, the collection aperture was defined by the 10 mm diffraction gratings in the SHS and standoff LIBS measurements were made up to 20 m with no additional collection optics, corresponding to a collection solid angle of 0...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28102776/targeted-delivery-of-cisplatin-to-tumor-xenografts-via-the-nanoparticle-component-of-nano-diamino-tetrac
#4
Thangirala Sudha, Dhruba J Bharali, Murat Yalcin, Noureldien He Darwish, Melis Debreli Coskun, Kelly A Keating, Hung-Yun Lin, Paul J Davis, Shaker A Mousa
AIM: Nano-diamino-tetrac (NDAT) targets a receptor on integrin αvβ3; αvβ3 is generously expressed by cancer cells and dividing endothelial cells and to a small extent by nonmalignant cells. The tetrac (tetraiodothyroacetic acid) of NDAT is covalently bound to a poly(lactic-co-glycolic acid) nanoparticle that encapsulates anticancer drugs. We report NDAT delivery efficiency of cisplatin to agent-susceptible urinary bladder cancer xenografts. MATERIALS & METHODS: Cisplatin-loaded NDAT (NDAT-cisplatin) was administered to xenograft-bearing nude mice...
January 19, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28102372/structure-transport-and-photoconductance-of-pbs-quantum-dot-monolayers-functionalized-with-a-copper-phthalocyanine-derivative
#5
A André, C Theurer, J Lauth, S Maiti, M Hodas, M Samadi Khoshkhoo, S Kinge, A J Meixner, F Schreiber, L D A Siebbeles, K Braun, M Scheele
We simultaneously surface-functionalize PbS nanocrystals with Cu 4,4',4'',4'''-tetraaminophthalocyanine and assemble this hybrid material into macroscopic monolayers. Electron microscopy and X-ray scattering reveal a granular mesocrystalline structure with strong coherence between the atomic lattice and the superlattice of nanocrystals within each domain. Terahertz spectroscopy and field-effect transistor measurements indicate efficient coupling of holes throughout the hybrid thin film, in conjunction with a pronounced photoresponse...
January 19, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28102291/improvement-in-the-biochemical-and-chemical-properties-of-badland-soils-by-thorny-bamboo
#6
Yo-Jin Shiau, Hsueh-Ching Wang, Tsai-Huei Chen, Shih-Hau Jien, Guanglong Tian, Chih-Yu Chiu
Badland soils-which have high silt and clay contents, bulk density, and soil electric conductivity- cover a large area of Southern Taiwan. This study evaluated the amelioration of these poor soils by thorny bamboo, one of the few plant species that grows in badland soils. Soil physiochemical and biological parameters were measured from three thorny bamboo plantations and nearby bare lands. Results show that bamboo increased microbial C and N, soil acid-hydrolysable C, recalcitrant C, and soluble organic C of badland soils...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28101142/exploring-accessibility-of-pretreated-poplar-cell-walls-by-measuring-dynamics-of-fluorescent-probes
#7
Gabriel Paës, Anouck Habrant, Jordane Ossemond, Brigitte Chabbert
BACKGROUND: The lignocellulosic cell wall network is resistant to enzymatic degradation due to the complex chemical and structural features. Pretreatments are thus commonly used to overcome natural recalcitrance of lignocellulose. Characterization of their impact on architecture requires combinatory approaches. However, the accessibility of the lignocellulosic cell walls still needs further insights to provide relevant information. RESULTS: Poplar specimens were pretreated using different conditions...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28100826/biomechanical-properties-of-wheat-grains-the-implications-on-milling
#8
James E Hourston, Michael Ignatz, Martin Reith, Gerhard Leubner-Metzger, Tina Steinbrecher
Millennia of continuous innovation have driven ever increasing efficiency in the milling process. Mechanically characterizing wheat grains and discerning the structure and function of the wheat bran layers can contribute to continuing innovation. We present novel shear force and puncture force testing regimes to characterize different wheat grain cultivars. The forces endured by wheat grains during the milling process can be quantified, enabling us to measure the impact of commonly applied grain pretreatments, such as microwave heating, extended tempering, enzyme and hormone treatments on grains of different 'hardness'...
January 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28100712/salt-management-strategy-defines-the-stem-and-leaf-hydraulic-characteristics-of-six-mangrove-tree-species
#9
Guo-Feng Jiang, Uromi Manage Goodale, Yan-Yan Liu, Guang-You Hao, Kun-Fang Cao
Mangroves in hypersaline coastal habitats are under constant high xylem tension and face great risk of hydraulic dysfunction. To investigate the relationships between functional traits and salt management, we measured 20 hydraulic and photosynthetic traits in four salt-adapted (SA) and two non-SA (NSA) mangrove tree species in south China. The SA species included two salt secretors (SSs), Avicennia marina (Forsskål) Vierhapper and Aegiceras corniculatum (L.) Blanco and two salt excluders (SEs), Bruguiera gymnorrhiza (L...
January 18, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28100710/tree-diversity-affects-chlorophyll-a-fluorescence-and-other-leaf-traits-of-tree-species-in-a-boreal-forest
#10
Martina Pollastrini, Ana Garcia Nogales, Raquel Benavides, Damien Bonal, Leena Finer, Mariangela Fotelli, Arthur Gessler, Charlotte Grossiord, Kalliopi Radoglou, Reto J Strasser, Filippo Bussotti
An assemblage of tree species with different crown properties creates heterogeneous environments at the canopy level. Changes of functional leaf traits are expected, especially those related to light interception and photosynthesis. Chlorophyll a fluorescence (ChlF) properties in dark-adapted leaves, specific leaf area, leaf nitrogen content (N) and carbon isotope composition (δ(13)C) were measured on Picea abies (L.) H.Karst., Pinus sylvestris L. and Betula pendula Roth. in monospecific and mixed boreal forests in Europe, in order to test whether they were affected by stand species richness and composition...
January 18, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28100231/can-screening-instruments-accurately-determine-poor-outcome-risk-in-adults-with-recent-onset-low-back-pain-a-systematic-review-and-meta-analysis
#11
Emma L Karran, James H McAuley, Adrian C Traeger, Susan L Hillier, Luzia Grabherr, Leslie N Russek, G Lorimer Moseley
BACKGROUND: Delivering efficient and effective healthcare is crucial for a condition as burdensome as low back pain (LBP). Stratified care strategies may be worthwhile, but rely on early and accurate patient screening using a valid and reliable instrument. The purpose of this study was to evaluate the performance of LBP screening instruments for determining risk of poor outcome in adults with LBP of less than 3 months duration. METHODS: Medline, Embase, CINAHL, PsycINFO, PEDro, Web of Science, SciVerse SCOPUS, and Cochrane Central Register of Controlled Trials were searched from June 2014 to March 2016...
January 19, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28100228/association-of-stem-cell-factor-gene-expression-with-severity-and-atopic-state-in-patients-with-bronchial-asthma
#12
Safaa I Tayel, Sally M El-Hefnway, Eman M Abd El Gayed, Gehan A Abdelaal
BACKGROUND: Bronchial asthma is a chronic inflammatory and remodeling disorder of the airways, in which many cells, cellular elements, and cytokines play important roles. Stem cell factor (SCF) may contribute to the inflammatory changes occurring in asthma. We aimed to show the expression of SCF gene in patients with asthma as a means of diagnosis and its association with severity and atopic state in these patients. METHODS: This study was carried out on 80 subjects, 50 asthmatic patients and 30 age and gender matched healthy control persons...
January 18, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28100092/sample-size-requirements-for-one-year-treatment-effects-using-deep-gray-matter-volume-from-3t-mri-in-progressive-forms-of-multiple-sclerosis
#13
Gloria Kim, Renxin Chu, Fawad Yousuf, Shahamat Tauhid, Lynn Stazzone, Maria K Houtchens, James M Stankiewicz, Christopher Severson, Dorlan Kimbrough, Francisco Quintana, Tanuja Chitnis, Howard L Weiner, Brian C Healy, Rohit Bakshi
OBJECTIVE: The subcortical deep gray matter (DGM) develops selective, progressive, and clinically-relevant atrophy in progressive forms of multiple sclerosis (PMS). This patient population is the target of active neurotherapeutic development, requiring the availability of outcome measures. We tested a fully automated MRI analysis pipeline to assess DGM atrophy in PMS. DESIGN/METHODS: Consistent 3D T1-weighted high-resolution 3T brain MRI was obtained over one year in 19 consecutive patients with PMS [15 secondary progressive, 4 primary progressive, 53% women, age (mean±SD) 50...
January 19, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28099997/on-joint-estimation-of-gaussian-graphical-models-for-spatial-and-temporal-data
#14
Zhixiang Lin, Tao Wang, Can Yang, Hongyu Zhao
In this article, we first propose a Bayesian neighborhood selection method to estimate Gaussian Graphical Models (GGMs). We show the graph selection consistency of this method in the sense that the posterior probability of the true model converges to one. When there are multiple groups of data available, instead of estimating the networks independently for each group, joint estimation of the networks may utilize the shared information among groups and lead to improved estimation for each individual network...
January 18, 2017: Biometrics
https://www.readbyqxmd.com/read/28099992/on-estimation-of-time-dependent-attributable-fraction-from-population-based-case-control-studies
#15
Wei Zhao, Ying Qing Chen, Li Hsu
Population attributable fraction (PAF) is widely used to quantify the disease burden associated with a modifiable exposure in a population. It has been extended to a time-varying measure that provides additional information on when and how the exposure's impact varies over time for cohort studies. However, there is no estimation procedure for PAF using data that are collected from population-based case-control studies, which, because of time and cost efficiency, are commonly used for studying genetic and environmental risk factors of disease incidences...
January 18, 2017: Biometrics
https://www.readbyqxmd.com/read/28099870/single-embryo-resolution-quantitative-analysis-of-reporters-permits-multiplex-spatial-cis-regulatory-analysis
#16
Catherine L Guay, Sean T McQuade, Jongmin Nam
Cis-regulatory modules (CRMs) control spatiotemporal gene expression patterns in embryos. While measurement of quantitative CRM activities has become efficient, measurement of spatial CRM activities still relies on slow, one-by-one methods. To overcome this bottleneck, we have developed a high-throughput method that can simultaneously measure quantitative and spatial CRM activities. The new method builds profiles of quantitative CRM activities measured at single-embryo resolution in many mosaic embryos and uses these profiles as a 'fingerprint' of spatial patterns...
January 15, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28099482/a-new-statistical-approach-to-characterize-chemical-elicited-behavioral-effects-in-high-throughput-studies-using-zebrafish
#17
Guozhu Zhang, Lisa Truong, Robert L Tanguay, David M Reif
Zebrafish have become an important alternative model for characterizing chemical bioactivity, partly due to the efficiency at which systematic, high-dimensional data can be generated. However, these new data present analytical challenges associated with scale and diversity. We developed a novel, robust statistical approach to characterize chemical-elicited effects in behavioral data from high-throughput screening (HTS) of all 1,060 Toxicity Forecaster (ToxCast™) chemicals across 5 concentrations at 120 hours post-fertilization (hpf)...
2017: PloS One
https://www.readbyqxmd.com/read/28099194/chronic-resistance-training-does-not-ameliorate-unloading-induced-decrements-in-neuromuscular-function
#18
Michael R Deschenes, Raymond W McCoy, Katherine A Mangis
OBJECTIVE: The aim of this study was to assess the efficacy of long-term resistance training in preventing the detrimental effects of muscle unloading on neuromuscular function. DESIGN: Eleven untrained men and 11 men with extensive backgrounds in resistance training were tested for several parameters of neuromuscular function at various isokinetic contractile velocities before and after 7 days of muscle unloading. Measurements included muscle mass, strength, power, total work, electromyography, and neuromuscular transmission efficiency using superimposed electrical stimulation of maximally contracting muscles...
January 17, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28099140/telomerase-antagonist-imetelstat-increases-radiation-sensitivity-in-esophageal-squamous-cell-carcinoma
#19
Xuping Wu, Jing Zhang, Sijun Yang, Zhihui Kuang, Guolei Tan, Gang Yang, Qichun Wei, Zhigang Guo
The morbidity and mortality of esophageal cancer is one of the highest around the world and the principal therapeutic method is radiation. Thus, searching for sensitizers with lower toxicity and higher efficiency to improve the efficacy of radiation therapy is critical essential. Our research group has previously reported that imetelstat, the thio-phosphoramidate oligonucleotide inhibitor of telomerase, can decrease cell proliferation and colony formation ability as well as increase DNA breaks induced by radiation in esophageal cancer cells...
January 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28099016/influence-of-energetic-disorder-on-exciton-lifetime-and-photoluminescence-efficiency-in-conjugated-polymers
#20
Irina Rörich, Oleksandr V Mikhnenko, Dominik W Gehrig, Paul W M Blom, Nicoleta Irina Craciun
Using time-resolved photoluminescence (TRPL) spectroscopy the exciton lifetime in a range of conjugated polymers is investigated. For poly(p-phenylene vinylene) (PPV)-based derivatives and a polyspirobifluorene copolymer (PSBF) we find that the exciton lifetime is correlated with the energetic disorder. Better ordered polymers exhibit a single exponential PL decay with exciton lifetimes of a few hundred picoseconds, whereas polymers with a larger degree of disorder show multi-exponential PL decays with exciton lifetimes in the nanosecond regime...
January 18, 2017: Journal of Physical Chemistry. B
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