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https://www.readbyqxmd.com/read/28319374/mechanisms-of-energy-transfer-and-enhanced-stability-of-carbidonitride-phosphors-for-solid-state-lighting
#1
Christopher Grieco, Kurt F Hirsekorn, Andrew T Heitsch, Alan C Thomas, Mark H McAdon, Britt A Vanchura, Michael M Romanelli, Lora L Brehm, Anne Leugers, Anatoliy Sokolov, John B Asbury
Phosphor-converted light emitting diodes (pcLEDs) produce white light through the use of phosphors that convert blue light emitted from the LED chip into green and red wavelengths. Understanding the mechanisms of degradation of the emission spectra and quantum yields of the phosphors used in pcLEDs is of critical importance to fully realize the potential of solid state lighting as an energy efficient technology. Toward this end, time-resolved photoluminescence spectroscopy was used to identify the mechanistic origins of enhanced stability and luminescence efficiency that can be obtained from a series of carbidonitride red phosphors with varying degree of substitutional carbon...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28319149/walking-and-talking-the-tree-of-life-why-and-how-to-teach-about-biodiversity
#2
Cissy J Ballen, Harry W Greene
Taxonomic details of diversity are an essential scaffolding for biology education, yet outdated methods for teaching the tree of life (TOL), as implied by textbook content and usage, are still commonly employed. Here, we show that the traditional approach only vaguely represents evolutionary relationships, fails to denote major events in the history of life, and relies heavily on memorizing near-meaningless taxonomic ranks. Conversely, a clade-based strategy-focused on common ancestry, monophyletic groups, and derived functional traits-is explicitly based on Darwin's "descent with modification," provides students with a rational system for organizing the details of biodiversity, and readily lends itself to active learning techniques...
March 2017: PLoS Biology
https://www.readbyqxmd.com/read/28318794/ethylenediaminedisuccinic-acid-edds-enhances-phytoextraction-of-lead-by-vetiver-grass-from-contaminated-residential-soils-in-a-panel-study-in-the-field
#3
Ramesh Attinti, Kirk R Barrett, Rupali Datta, Dibyendu Sarkar
Phytoextraction is a green remediation technology for cleaning contaminated soils. Application of chelating agents increases metal solubility and enhances phytoextraction. Following a successful greenhouse experiment, a panel study under field weather elucidated the efficiency of the chelating agent ethylenediaminedisuccinic acid (EDDS) on phytoextraction of lead (Pb) by vetiver grass, a hyperaccumulator of Pb, and a nonaccumulator fescue grass from residential soils contaminated with Pb-based paint from Baltimore, MD and San Antonio, TX...
March 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28304134/a-modified-eco-efficiency-framework-and-methodology-for-advancing-the-state-of-practice-of-sustainability-analysis-as-applied-to-green-infrastructure
#4
Santosh R Ghimire, John M Johnston
We propose a modified eco-efficiency (EE) framework and novel sustainability analysis methodology for green infrastructure (GI) practices used in water resource management. GI practices such as rainwater harvesting (RWH), rain gardens, porous pavements, and green roofs are emerging as viable strategies for climate change adaptation. The modified framework includes four economic, 11 environmental, and three social indicators. Using six indicators from the framework, at least one from each dimension of sustainability, we demonstrate the methodology to analyze RWH designs...
March 17, 2017: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/28303540/exploiting-fruit-byproducts-for-eco-friendly-nanosynthesis-citrus%C3%A2-%C3%A3-%C3%A2-clementina-peel-extract-mediated-fabrication-of-silver-nanoparticles-with-high-efficacy-against-microbial-pathogens-and-rat-glial-tumor-c6-cells
#5
Rijuta Ganesh Saratale, Han-Seung Shin, Gopalakrishnan Kumar, Giovanni Benelli, Gajanan S Ghodake, Yuan Yuan Jiang, Dong Su Kim, Ganesh Dattatraya Saratale
Process byproducts from the fruit industry may represent a cheap and reliable source of green reducing agents to be used in current bio-nanosynthesis. This study reports the use of orange (Citrus × clementina) peel aqueous extract (OPE) for one-pot green synthesis of silver nanoparticles (AgNPs) with high effectiveness against various microbial pathogens as well as rat glial tumor C6 cells. The effects of various operational parameters on the synthesis of AgNPs were systematically investigated. The morphology, particle size, and properties of synthesized AgNPs were characterized using UV-visible spectroscopy, x-ray diffraction, x-ray photoelectron spectroscopy, field emission scanning electron microscopy, energy-dispersive x-ray spectroscopy, and Fourier transform infrared spectroscopy...
March 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28303038/nutritional-properties-of-green-gram-germinated-in-mineral-fortified-soak-water-i-effect-of-dehulling-on-total-and-bioaccessible-nutrients-and-bioactive-components
#6
Morteza Oghbaei, Jamuna Prakash
The study aimed at investigating the effect of germinating green gram (Vigna radiata, GG) in mineral fortified soak water on total and bioaccessible nutrients and bioactive components in whole and dehulled GG. Whole GG was soaked in water fortified with iron (100 or 200 mg/100 ml) or zinc (50 or 100 mg/100 ml), germinated and a portion was dehulled. Whole and dehulled grains were analyzed for selected total and in vitro digestible/bioaccessible constituents. GG germinated in water served as controls. GG germinated in mineral fortified soak water had high iron and zinc content in whole and dehulled grains...
March 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28300605/a-rapid-quantification-of-binocular-misalignment-without-recording-eye-movements-vertical-and-torsional-alignment-nulling
#7
Kara H Beaton, Mark J Shelhamer, Dale C Roberts, Michael C Schubert
BACKGROUND: Small, innate asymmetries between the left and right otolith organs can cause ocular misalignment with symptoms that include double vision and motion sickness. Additionally, ocular misalignment affects nearly 5% of the US population. We have developed a portable, non-invasive technology that uses subjective perception of binocular visual signals to estimate relative binocular alignment. NEW METHOD AND RESULTS: The Vertical Alignment Nulling (VAN) and Torsional Alignment Nulling (TAN) tests ask subjects to view one red and one blue line on a tablet computer while looking through color-matched red and blue filters so that each eye sees only one of the lines...
March 11, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28299934/antibacterial-composite-film-based-triboelectric-nanogenerator-for-harvesting-walking-energy
#8
Guangqin Gu, Changbao Han, Jingjing Tian, Cunxin Lu, Chuan He, Tao Jiang, Zhou Li, Zhong Lin Wang
As a green and eco-friendly technology, triboelectric nanogenerator (TENG) can harvest energy from human motion to generate electricity, so TENGs have been widely applied in wearable electronic devices to replace the traditional batteries. However, the surface of these TENGs is easy to be contaminated and breed bacteria, which is a threat to human health. Here, we report an antibacterial composite film-based triboelectric nanogenerator (ACF-TENG) that uses Ag exchanged zeolite (Ag-zeolite) and polypropylene (PP) composite film as the triboelectric layer...
March 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28297579/endothelial-cells-promote-expansion-of-long-term-engrafting-marrow-hematopoietic-stem-and-progenitor-cells-in-primates
#9
Jennifer L Gori, Jason M Butler, Balvir Kunar, Michael G Poulos, Michael Ginsberg, Daniel J Nolan, Zachary K Norgaard, Jennifer E Adair, Shahin Rafii, Hans-Peter Kiem
Successful expansion of bone marrow (BM) hematopoietic stem and progenitor cells (HSPCs) would benefit many HSPC transplantation and gene therapy/editing applications. However, current expansion technologies have been limited by a loss of multipotency and self-renewal properties ex vivo. We hypothesized that an ex vivo vascular niche would provide prohematopoietic signals to expand HSPCs while maintaining multipotency and self-renewal. To test this hypothesis, BM autologous CD34(+) cells were expanded in endothelial cell (EC) coculture and transplanted in nonhuman primates...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28290448/rare-earth-separations-by-selective-borate-crystallization
#10
Xuemiao Yin, Yaxing Wang, Xiaojing Bai, Yumin Wang, Lanhua Chen, Chengliang Xiao, Juan Diwu, Shiyu Du, Zhifang Chai, Thomas E Albrecht-Schmitt, Shuao Wang
Lanthanides possess similar chemical properties rendering their separation from one another a challenge of fundamental chemical and global importance given their incorporation into many advanced technologies. New separation strategies combining green chemistry with low cost and high efficiency remain highly desirable. We demonstrate that the subtle bonding differences among trivalent lanthanides can be amplified during the crystallization of borates, providing chemical recognition of specific lanthanides that originates from Ln(3+) coordination alterations, borate polymerization diversity and soft ligand coordination selectivity...
March 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/28288103/reproducibility-of-computational-workflows-is-automated-using-continuous-analysis
#11
Brett K Beaulieu-Jones, Casey S Greene
Replication, validation and extension of experiments are crucial for scientific progress. Computational experiments are scriptable and should be easy to reproduce. However, computational analyses are designed and run in a specific computing environment, which may be difficult or impossible to match using written instructions. We report the development of continuous analysis, a workflow that enables reproducible computational analyses. Continuous analysis combines Docker, a container technology akin to virtual machines, with continuous integration, a software development technique, to automatically rerun a computational analysis whenever updates or improvements are made to source code or data...
March 13, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28285526/lipophilization-of-hydroxytyrosol-enriched-fractions-from-olea-europaea-l-by-products-and-evaluation-of-the-in-vitro-effects-on-a-model-of-colorectal-cancer-cells
#12
Roberta Bernini, Isabella Carastro, Gaia Palmini, Annalisa Tanini, Roberto Zonefrati, Patrizia Pinelli, Maria Luisa Brandi, Annalisa Romani
A hydroxytyrosol (HTyr)-enriched fraction containing HTyr 6% w/w, derived from Olea europaea L. by-products, obtained using an environmentally and economically sustainable technology was lipophilized under green chemistry conditions. The effects of three fractions containing hydroxytyrosyl butanoate, octanoate and oleate and unreacted HTyr, named, respectively, lipophilic fraction 5, 6 and 7, on the human colon cancer cell line HCT8-β8 engineered to overexpress estrogen receptor  (ER) were evaluated and compared to those of pure HTyr...
March 12, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28284942/investigation-on-by-products-of-bioenergy-systems-anaerobic-digestion-and-gasification-as-potential-crop-nutrient-using-ftir-xrd-sem-analysis-and-phyto-toxicity-test
#13
Sampriti Kataki, Samarendra Hazarika, D C Baruah
Success and acceptability of the bio energy conversion technology to a large extent depend upon management of the inevitable by-products generated during the conversion process. By-products can be considered favourable as organic fertilizer as they retain nutrients with varying composition depending upon input biomass. However, characteristics of these heterogeneous resources with respect to feedstock and processing conditions have to be assessed to state on their agricultural and environmental benefits. Therefore, 3 types of anaerobic digestion by-products (digestate) from surplus biomass viz...
March 9, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28283763/specific-computed-virtual-chromoendoscopy-for-detection-of-peritoneal-carcinomatosis-an-animal-study
#14
Haythem Najah, Ingrid Jouvin, Samaher Besbes, Diana Cifuentes, Clarisse Eveno, Marc Pocard
BACKGROUND: Detection of an incipient Peritoneal Carcinomatosis (PC) is still challenging, and there is a crucial need for technological improvements in order to diagnose and to treat early this condition. The aim of this study was to create a murine model of incipient PC and to explore the PC with Fujinon Intelligent Chromo Endoscopy (FICE) in order to determine the wavelengths of the white light (WL) spectre that offer the highest contrast between PC nodules and surrounding peritoneum...
March 10, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28283297/a-new-approach-for-the-estimation-of-phytoplankton-cell-counts-associated-with-algal-blooms
#15
Majid Nazeer, Man Sing Wong, Janet Elizabeth Nichol
This study proposes a method for estimating phytoplankton cell counts associated with an algal bloom, using satellite images coincident with in situ and meteorological parameters. Satellite images from Landsat Thematic Mapper (TM), Enhanced Thematic Mapper Plus (ETM+), Operational Land Imager (OLI) and HJ-1 A/B Charge Couple Device (CCD) sensors were integrated with the meteorological observations to provide an estimate of phytoplankton cell counts. All images were atmospherically corrected using the Second Simulation of the Satellite Signal in the Solar Spectrum (6S) atmospheric correction method with a possible error of 1...
March 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28281264/resonance-energy-transfer-based-nucleic-acid-hybridization-assays-on-paper-based-platforms-using-emissive-nanoparticles-as-donors
#16
Samer Doughan, M Omair Noor, Yi Han, Ulrich J Krull
Quantum dots (QDs) and upconverting nanoparticles (UCNPs) are luminescent nanoparticles (NPs) commonly used in bioassays and biosensors as resonance energy transfer (RET) donors. The narrow and tunable emissions of both QDs and UCNPs make them versatile RET donors that can be paired with a wide range of acceptors. Ratiometric signal processing that compares donor and acceptor emission in RET-based transduction offers improved precision, as it accounts for fluctuations in the absolute photoluminescence (PL) intensities of the donor and acceptor that can result from experimental and instrumental variations...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28281260/low-cost-charged-coupled-device-ccd-based-detectors-for-shiga-toxins-activity-analysis
#17
Reuven Rasooly, Ben Prickril, Hugh A Bruck, Avraham Rasooly
To improve food safety there is a need to develop simple, low-cost sensitive devices for detection of food-borne pathogens and their toxins. We describe a simple, low-cost webcam-based detector which can be used for various optical detection modalities, including fluorescence, chemiluminescence, densitometry, and colorimetric assays. The portable battery-operated CCD-based detection system consists of four modules: (1) a webcam to measure and record light emission, (2) a sample plate to perform assays, (3) a light emitting diode (LED) for illumination, and (4) a portable computer to acquire and analyze images...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28281123/icg-fluorescence-imaging-for-quantitative-evaluation-of-colonic-perfusion-in-laparoscopic-colorectal-surgery
#18
Toshiaki Wada, Kenji Kawada, Ryo Takahashi, Mami Yoshitomi, Koya Hida, Suguru Hasegawa, Yoshiharu Sakai
BACKGROUND: Fluorescence technology with indocyanine green (ICG) provides a real-time assessment of intestinal perfusion. However, a subjective evaluation of fluorescence intensity based on the surgeon's visual judgement is a major limitation. This study evaluated the quantitative assessment of ICG fluorescence imaging in determining the transection line of the proximal colon during laparoscopic colorectal surgery. METHODS: This is a retrospective analysis of a prospectively maintained database of 112 patients who underwent laparoscopic surgery for left-sided colorectal cancers...
March 9, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28278761/spectroscopic-investigation-on-interaction-of-biogenic-croton-bonplandianum-leaves-extract-mediated-potential-bactericidal-silver-nanoparticles-with-human-hemoglobin-and-human-serum-albumin
#19
Maidul Beg, Anukul Maji, Amit Kumar Mandal, Somnath Das, Pradeep K Jha, Maidul Hossain
The green synthesis of nanoparticles has received increasing attention due to the growing demand to produce safe, cost-effective, and eco-friendly technology for nanomaterials synthesis. We report on the use of aqueous Croton bonplandianum (Family: Euphorbiaceae, Genus: Croton) leaves extract for the preparation of silver nanoparticles (AgNPs) without using any external reducing and stabilizing agent. Ultraviolet-visible spectroscopy showed maximum absorbance at 446 nm due to surface plasmon resonance of AgNPs...
February 28, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28278154/harnessing-the-hidden-genetic-diversity-for-improving-multiple-abiotic-stress-tolerance-in-rice-oryza-sativa-l
#20
Jauhar Ali, Jian-Long Xu, Yong-Ming Gao, Xiu-Fang Ma, Li-Jun Meng, Ying Wang, Yun-Long Pang, Yong-Sheng Guan, Mei-Rong Xu, Jastin E Revilleza, Neil J Franje, Shao-Chuan Zhou, Zhi-Kang Li
To develop superior rice varieties with improved yield in most rainfed areas of Asia/Africa, we started an introgression-breeding program for simultaneously improving yield and tolerances of multiple abiotic stresses. Using eight BC1 populations derived from a widely adaptable recipient and eight donors plus three rounds of phenotypic selection, we developed 496 introgression lines (ILs) with significantly higher yield under drought, salt and/or non-stress conditions in 5 years. Six new varieties were released in the Philippines and Pakistan and many more are being evaluated in multi-location yield trials for releasing in several countries...
2017: PloS One
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