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https://www.readbyqxmd.com/read/28646084/a-novel-mechanism-linked-to-cell-density-largely-controls-cell-division-in-synechocystis
#1
Alberto A Esteves-Ferreira, Masami Inaba, Toshihiro Obata, Antoine Fort, Gerard Fleming, Wagner L Araújo, Alisdair R Fernie, Ronan Sulpice
Many studies have investigated the various genetic and environmental factors regulating cyanobacterial growth. Here, we investigated the growth and metabolism of Synechocystis sp. PCC 6803, under different nitrogen sources, light intensities and CO2 concentrations. Cells grown on urea showed the highest growth rates. However, for all the conditions, the daily growth rates in batch cultures decreased steadily over time, and stationary phase was obtained with similar cell densities. Unexpectedly, metabolic and physiological analyses showed that growth rates during log phase were not primarily controlled by the availability of photoassimilates...
June 23, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28642799/extraoral-taste-receptor-discovery-new-light-on-ayurvedic-pharmacology
#2
REVIEW
Marilena Gilca, Dorin Dragos
More and more research studies are revealing unexpectedly important roles of taste for health and pathogenesis of various diseases. Only recently it has been shown that taste receptors have many extraoral locations (e.g., stomach, intestines, liver, pancreas, respiratory system, heart, brain, kidney, urinary bladder, pancreas, adipose tissue, testis, and ovary), being part of a large diffuse chemosensory system. The functional implications of these taste receptors widely dispersed in various organs or tissues shed a new light on several concepts used in ayurvedic pharmacology (dravyaguna vijnana), such as taste (rasa), postdigestive effect (vipaka), qualities (guna), and energetic nature (virya)...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28642713/benefits-of-substituting-sitting-with-standing-and-walking-in-free-living-conditions-for-cardiometabolic-risk-markers-cognition-and-mood-in-overweight-adults
#3
Bernard M F M Duvivier, Nicolaas C Schaper, Annemarie Koster, Linh van Kan, Harry P F Peters, Jos J Adam, Timo Giesbrecht, Esther Kornips, Martine Hulsbosch, Paul Willems, Matthijs K C Hesselink, Patrick Schrauwen, Hans H C M Savelberg
Background: We investigated whether substituting sitting with standing and self-perceived light walking in free-living conditions would improve cardiometabolic risk factors, mood, and cognition in overweight/obese adults. Methods: In a randomized, cross-over study, 24 (m/f: 13/11) sedentary overweight/obese participants (64 ± 7 years, BMI 29 ± 2 kg/m(2)) followed two activity regimens of each 4 days in free-living conditions: "Sit": sitting 13.5 h/day, standing 1.4 h/day, self-perceived light-intensity walking 0...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28641258/quality-assessment-of-perceptual-crosstalk-on-two-view-auto-stereoscopic-displays
#4
Jongyoo Kim, Taewan Kim, Sanghoon Lee, Alan C Bovik
Crosstalk is one of the most severe factors affecting the perceived quality of stereoscopic 3D (S3D) images. It arises from a leakage of light intensity between multiple views, as in auto-stereoscopic displays. Well-known determinants of crosstalk include the co-location contrast and disparity of the left and right images, which have been dealt with in prior studies. However, when a natural stereo image that contains complex naturalistic spatial characteristics is viewed on an auto-stereoscopic display, other factors may also play an important role in the perception of crosstalk...
June 19, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28640922/changes-in-hemp-secondary-fiber-production-related-to-technical-fiber-variability-revealed-by-light-microscopy-and-attenuated-total-reflectance-fourier-transform-infrared-spectroscopy
#5
Eva Fernandez-Tendero, Arnaud Day, Sandrine Legros, Anouck Habrant, Simon Hawkins, Brigitte Chabbert
Interest in hemp (Cannabis sativa L.) is increasing due to the development of a new range of industrial applications based on bast fibers. However the variability of bast fiber yield and quality represents an important barrier to further exploitation. Primary and secondary fiber content was examined in two commercial hemp varieties (Fedora 17, Santhica 27) grown under contrasted sowing density and irrigation conditions. Both growing conditions and hemp varieties impact stem tissue architecture with a large effect on the proportion of secondary fibers but not primary fibers...
2017: PloS One
https://www.readbyqxmd.com/read/28640211/a-novel-active-imaging-model-to-design-visual-systems-a-case-of-inspection-system-for-specular-surfaces
#6
Jorge Azorin-Lopez, Andres Fuster-Guillo, Marcelo Saval-Calvo, Higinio Mora-Mora, Juan Manuel Garcia-Chamizo
The use of visual information is a very well known input from different kinds of sensors. However, most of the perception problems are individually modeled and tackled. It is necessary to provide a general imaging model that allows us to parametrize different input systems as well as their problems and possible solutions. In this paper, we present an active vision model considering the imaging system as a whole (including camera, lighting system, object to be perceived) in order to propose solutions to automated visual systems that present problems that we perceive...
June 22, 2017: Sensors
https://www.readbyqxmd.com/read/28639143/quality-of-life-after-carotid-endarterectomy-a-review-of-the-literature
#7
REVIEW
Mariusz Chabowski, Anna Grzebien, Agnieszka Ziomek, Karolina Dorobisz, Michał Leśniak, Dariusz Janczak
Strokes are one of the leading causes of death, morbidity, and disability worldwide, mainly among elderly people. It is also the third most common cause of years of life being lost, indicating a high risk of premature mortality. Revascularisation with endarterectomy (CEA) is effective in reducing the risk of death and strokes in patients with carotid artery stenosis, but the effect of invasive treatment on quality of life (QoL) still needs attention. To shed more light on the patients' perspective on this health condition, we carried out a review of the literature which aimed to analyze the level of health-related QoL among stroke survivors, with special attention to patients who had been treated with CEA...
June 21, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28638245/optical-coherence-tomography-technology-and-quality-improvement-methods-for-optical-coherence-tomography-images-of-skin-a-short-review
#8
REVIEW
Saba Adabi, Zahra Turani, Emad Fatemizadeh, Anne Clayton, Mohammadreza Nasiriavanaki
Optical coherence tomography (OCT) delivers 3-dimensional images of tissue microstructures. Although OCT imaging offers a promising high-resolution method, OCT images experience some artifacts that lead to misapprehension of tissue structures. Speckle, intensity decay, and blurring are 3 major artifacts in OCT images. Speckle is due to the low coherent light source used in the configuration of OCT. Intensity decay is a deterioration of light with respect to depth, and blurring is the consequence of deficiencies of optical components...
2017: Biomedical Engineering and Computational Biology
https://www.readbyqxmd.com/read/28635570/quality-dementia-care-prerequisites-and-relational-ethics-among-multicultural-healthcare-providers
#9
Gerd Sylvi Sellevold, Veslemøy Egede-Nissen, Rita Jakobsen, Venke Sørlie
BACKGROUND: Many nursing homes appear as multicultural workplaces where the majority of healthcare providers have an ethnic minority background. This environment creates challenges linked to communication, interaction and cultural differences. Furthermore, the healthcare providers have varied experiences and understanding of what quality care of patients with dementia involves. PURPOSE: The aim of this study is to illuminate multi-ethnic healthcare providers' lived experiences of their own working relationship, and its importance to quality care for people with dementia...
January 1, 2017: Nursing Ethics
https://www.readbyqxmd.com/read/28634122/mapping-the-binding-interface-in-a-non-covalent-size-variant-of-a-monoclonal-antibody-using-native-mass-spectrometry-hydrogen-deuterium-exchange-mass-spectrometry-and-computational-analysis
#10
Yuetian Yan, Hui Wei, Sutjano Jusuf, Stanley R Krystek, Jie Chen, Guodong Chen, Richard T Ludwig, Li Tao, Tapan K Das
Variants of monoclonal antibody containing an extra light chain has been reported in protein products(1-3). Due to potential impact on potency and immunogenicity, it is important to understand the formation mechanism of such variants so that appropriate control strategies can be implemented to assure product quality. In a model monoclonal antibody, we observed a size variant with an extra light chain non-covalently associated with the monomer (later named as "1.2mer"). The interaction between monomer and the extra light chain was characterized by native spray and hydrogen/deuterium exchange mass spectrometry (HDX MS) techniques...
June 17, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28633144/standardized-renal-endpoints-for-perioperative-clinical-trials-the-standardized-endpoints-in-perioperative-medicine-initiative
#11
David R McIlroy, Andrew D Shaw, Paul S Myles
Perioperative acute kidney injury is a common problem. While clinical trials seek to evaluate the impact of interventions on a variety of primary and secondary endpoints with the aim of implementing this knowledge to improve perioperative outcomes, the use of valid and relevant endpoints within clinical trials is of critical importance to achieving this goal. Suitable endpoints must be validated for the study population and in light of the clinical context under investigation while also considering regulatory requirements that govern the licensing of new therapeutic agents as well as the values of patients whose outcomes we seek to improve...
June 21, 2017: Nephron
https://www.readbyqxmd.com/read/28632740/soft-bilateral-filtering-volumetric-shadows-using-cube-shadow-maps
#12
Hatam H Ali, Mohd Shahrizal Sunar, Hoshang Kolivand
Volumetric shadows often increase the realism of rendered scenes in computer graphics. Typical volumetric shadows techniques do not provide a smooth transition effect in real-time with conservation on crispness of boundaries. This research presents a new technique for generating high quality volumetric shadows by sampling and interpolation. Contrary to conventional ray marching method, which requires extensive time, this proposed technique adopts downsampling in calculating ray marching. Furthermore, light scattering is computed in High Dynamic Range buffer to generate tone mapping...
2017: PloS One
https://www.readbyqxmd.com/read/28632399/prokaryotic-contig-annotation-pipeline-server-web-application-for-a-prokaryotic-genome-annotation-pipeline-based-on-the-shiny-app-package
#13
Byeonghyeok Park, Min-Jeong Baek, Byoungnam Min, In-Geol Choi
Genome annotation is a primary step in genomic research. To establish a light and portable prokaryotic genome annotation pipeline for use in individual laboratories, we developed a Shiny app package designated as "P-CAPS" (Prokaryotic Contig Annotation Pipeline Server). The package is composed of R and Python scripts that integrate publicly available annotation programs into a server application. P-CAPS is not only a browser-based interactive application but also a distributable Shiny app package that can be installed on any personal computer...
June 20, 2017: Journal of Computational Biology: a Journal of Computational Molecular Cell Biology
https://www.readbyqxmd.com/read/28632325/nickelocene-precursor-facilitated-fast-growth-of-graphene-h-bn-vertical-heterostructures-and-its-applications-in-oleds
#14
Qiucheng Li, Zifeng Zhao, Baoming Yan, Xiuju Song, Zhepeng Zhang, Jia Li, Xiaosong Wu, Zuqiang Bian, Xiaolong Zou, Yanfeng Zhang, Zhongfan Liu
The direct growth of high-quality, large-area, uniform, vertically stacked Gr/h-BN heterostructures is of vital importance for applications in electronics and optoelectronics. However, the main challenge lies in the catalytically inert nature of the hexagonal boron nitride (h-BN) substrates, which usually afford a rather low decomposition rate of carbon precursors, and thus relatively low growth rate of graphene. Herein, a nickelocene-precursor-facilitated route is developed for the fast growth of Gr/h-BN vertical heterostructures on Cu foils, which shows much improved synthesis efficiency (8-10 times faster) and crystalline quality of graphene (large single-crystalline domain up to ≈20 µm)...
June 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28632265/3d-printed-conformal-microfluidics-for-isolation-and-profiling-of-biomarkers-from-whole-organs
#15
Manjot Singh, Yuxin Tong, Kelly Webster, Ellen Cesewski, Alexander P Haring, Sahil Laheri, Bill Carswell, Timothy J O'Brien, Charles H Aardema, Ryan S Senger, John L Robertson, Blake N Johnson
The ability to interface microfluidic devices with native complex biological architectures, such as whole organs, has the potential to shift the paradigm for the study and analysis of biological tissue. Here, we show 3D printing can be used to fabricate bio-inspired conformal microfluidic devices that directly interface with the surface of whole organs. Structured-light scanning techniques enabled the 3D topographical matching of microfluidic device geometry to porcine kidney anatomy. Our studies show molecular species are spontaneously transferred from the organ cortex to the conformal microfluidic device in the presence of fluid flow through the organ-conforming microchannel...
June 20, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28629139/novel-descattering-approach-for-stereo-vision-in-dense-suspended-scatterer-environments
#16
Chanh D Tr Nguyen, Jihyuk Park, Kyeong-Yong Cho, Kyung-Soo Kim, Soohyun Kim
In this paper, we propose a model-based scattering removal method for stereo vision for robot manipulation in indoor scattering media where the commonly used ranging sensors are unable to work. Stereo vision is an inherently ill-posed and challenging problem. It is even more difficult in the case of images of dense fog or dense steam scenes illuminated by active light sources. Images taken in such environments suffer attenuation of object radiance and scattering of the active light sources. To solve this problem, we first derive the imaging model for images taken in a dense scattering medium with a single active illumination close to the cameras...
June 17, 2017: Sensors
https://www.readbyqxmd.com/read/28625617/response-of-the-seagrass-halophila-ovalis-to-altered-light-quality-in-a-simulated-dredge-plume
#17
Simone Strydom, Kathryn McMahon, Paul S Lavery
Seagrass meadows are globally threatened, largely through activities that reduce light quantity (photosynthetic photon flux density) such as dredging. However, these activities can simultaneously alter the spectral quality of light. Previous studies showed that Halophila ovalis seagrass productivity is reduced under monochromatic yellow/green light, wavelengths associated with dredge plumes, but it is unclear how they respond to spectra produced by real dredging projects. We simultaneously subjected adult H...
June 15, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28623338/high-resolution-imaging-of-a-cell-attached-nanointerface-using-a-gold-nanoparticle-two-dimensional-sheet
#18
Shihomi Masuda, Yuhki Yanase, Eiji Usukura, Sou Ryuzaki, Pangpang Wang, Koichi Okamoto, Thasaneeya Kuboki, Satoru Kidoaki, Kaoru Tamada
This paper proposes a simple, effective, non-scanning method for the visualization of a cell-attached nanointerface. The method uses localized surface plasmon resonance (LSPR) excited homogeneously on a two-dimensional (2D) self-assembled gold-nanoparticle sheet. The LSPR of the gold-nanoparticle sheet provides high-contrast interfacial images due to the confined light within a region a few tens of nanometers from the particles and the enhancement of fluorescence. Test experiments on rat basophilic leukemia (RBL-2H3) cells with fluorescence-labeled actin filaments revealed high axial and lateral resolution even under a regular epifluorescence microscope, which produced higher quality images than those captured under a total internal reflection fluorescence (TIRF) microscope...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28622786/dairy-cow-disability-weights
#19
Craig S McConnel, Ashleigh A McNeil, Joleen C Hadrich, Jason E Lombard, Franklyn B Garry, Jane Heller
Over the past 175 years, data related to human disease and death have progressed to a summary measure of population health, the Disability-Adjusted Life Year (DALY). As dairies have intensified there has been no equivalent measure of the impact of disease on the productive life and well-being of animals. The development of a disease-adjusted metric requires a consistent set of disability weights that reflect the relative severity of important diseases. The objective of this study was to use an international survey of dairy authorities to derive disability weights for primary disease categories recorded on dairies...
August 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28622755/cross-sensory-correspondences-heaviness-is-dark-and-low-pitched
#20
Peter Walker, Gabrielle Scallon, Brian Francis
Everyday language reveals how stimuli encoded in one sensory feature domain can possess qualities normally associated with a different domain (e.g., higher pitch sounds are bright, light in weight, sharp, and thin). Such cross-sensory associations appear to reflect crosstalk among aligned (corresponding) feature dimensions, including brightness, heaviness, and sharpness. Evidence for heaviness being one such dimension is very limited, with heaviness appearing primarily as a verbal associate of other feature contrasts (e...
July 2017: Perception
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