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https://www.readbyqxmd.com/read/28437992/a-large-airborne-survey-of-earth-s-visible-infrared-spectral-dimensionality
#1
David R Thompson, Joseph W Boardman, Michael L Eastwood, Robert O Green
The intrinsic spectral dimensionality indicates the observable degrees of freedom in Earth's solar-reflected light field, quantifying the diversity of spectral content accessible by visible and infrared remote sensing. The solar-reflected regime spans the 0.38 - 2.5 μm interval, and is captured by a wide range of current and planned instruments on both airborne and orbital platforms. To date there has been no systematic study of its spectral dimensionality as a function of space, time, and land cover. Here we report a multi-site, multi-year statistical survey by NASA's "Classic" Airborne Visible Near InfraRed Spectrometer (AVIRIS-C)...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437662/life-in-earth-the-root-microbiome-to-the-rescue
#2
REVIEW
Tim H Mauchline, Jacob G Malone
Manipulation of the soil microbiome holds great promise for contributing to more environmentally benign agriculture, with soil microbes such as Pseudomonas promoting plant growth and effectively suppressing pathogenic microorganisms. Next-generation sequencing has enabled a new generation of research into soil microbiomes, presenting the opportunity to better understand and exploit these valuable resources. Soil bacterial communities are both highly complex and variable, and contain vast interspecies and intraspecies diversity, both of which respond to environmental variation...
April 21, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/28437164/factors-affecting-the-levels-of-heavy-metals-in-juices-processed-with-filter-aids
#3
Zhengfang Wang, Lauren S Jackson, Joseph E Jablonski
This study investigated factors that may contribute to the presence of arsenic and other heavy metals in apple and grape juices processed with filter aids. Different types and grades of filter aids were analyzed for arsenic, lead, and cadmium with inductively coupled plasma-tandem mass spectrometry. Potential factors affecting the transfer of heavy metals to juices during filtration treatments were evaluated. Effects of washing treatments on removal of heavy metals from filter aids were also determined. Results showed that diatomaceous earth (DE) generally contained a higher level of arsenic than perlite, whereas perlite had a higher lead content than DE...
April 24, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28437019/extending-unique-1d-borate-chains-to-3d-framework-by-introducing-metallic-nodes
#4
Guo-Yu Yang, Qi Wei, Shi-Jia Sun, Jie Zhang
Two novel alkali/alkaline-earth borates, Ba6[B6O9 (OH)6]2(H3BO3) (1) and Li7MAlB12O24 (M = Ba, Sr, Ca) (2a-c), with 1- and 3-D structures have been hydrothermally made and characterized. 1 features a rarely 1-D anionic chain built by hexaborate clusters of B6O11(OH)6 made of six BO4/ BO2(OH)2 tetrahedra. The anionic chains are embedded in the channels of Ba6-based wheel cluster open-framework. On the basis of the structural analyses of 1, by incorporating the rational Al atoms as the linkers and tuning the reaction conditions, the anhydrous borates 2a-c have been success-fully obtained, showing novel 3-D aluminoborates (ABOs) constructed from B6O14-based cluster chains and AlO6 octa-hedra...
April 24, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28436819/insight-into-the-evolution-of-microbial-metabolism-from-the-deep-branching-bacterium-thermovibrio-ammonificans
#5
Donato Giovannelli, Stefan M Sievert, Michael Hügler, Stephanie Markert, Dörte Becher, Thomas Schweder, Costantino Vetriani
Anaerobic thermophiles inhabit relic environments that resemble the early Earth. However, the lineage of these modern organisms co-evolved with our planet. Hence, these organisms carry both ancestral and acquired genes and serve as models to reconstruct early metabolism. Based on comparative genomic and proteomic analyses, we identified two distinct groups of genes in Thermovibrio ammonificans: the first codes for enzymes that do not require oxygen and use substrates of geothermal origin; the second appears to be a more recent acquisition, and may reflect adaptations to cope with the rise of oxygen on Earth...
April 24, 2017: ELife
https://www.readbyqxmd.com/read/28436509/covering-the-optical-spectrum-through-collective-rare-earth-doping-of-nagdf4-nanoparticles-806-and-980-nm-excitation-routes
#6
A Skripka, R Marin, A Benayas, P Canton, E Hemmer, F Vetrone
Today, at the frontier of biomedical research, the need has been clearly established for integrating disease detection and therapeutic function in one single theranostic system. Light-emitting nanoparticles are being intensively investigated to fulfil this demand, by continuously developing nanoparticle systems simultaneously emitting in both the UV/visible (light-triggered release and activation of drugs) and the near-infrared (imaging and tracking) spectral regions. In this work, rare-earth (RE) doped nanoparticles (RENPs) were synthesized via a thermal decomposition process and spectroscopically investigated as potential candidates as all-in-one optical imaging, diagnostic and therapeutic agents...
April 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28436216/energy-sensitive-ion-and-cathode-luminescent-radiation-beam-monitors-based-on-a-multilayer-thin-film-designs
#7
Jorge Gil-Rostra, Francisco Javier Ferrer, Juan Pedro Espinos, Agustín R Gonzalez-Elipe, Francisco Yubero
A multilayer luminescent design concept is presented to develop energy sensitive radiation beam monitors based on colorimetric analysis. Each luminescent layer within the stack consists of rare earth doped transparent oxides of optical quality and a characteristic luminescent emission under excitation with electron or ion beams. For a given type of particle beam (electron, protons, alpha particles, …), its penetration depth and therefore its energy loss at a particular buried layer within the multilayer stack depend on the initial beam energy...
April 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28435960/meteorite-impacts-on-ancient-oceans-opened-up-multiple-nh3-production-pathways
#8
Kohei Shimamura, Fuyuki Shimojo, Aiichiro Nakano, Shigenori Tanaka
A recent series of shock experiments by Nakazawa et al. starting in 2005 (e.g. [Nakazawa et al., Earth Planet. Sci. Lett., 2005, 235, 356]) suggested that meteorite impacts on ancient oceans would have yielded a considerable amount of NH3 to the early Earth from atmospheric N2 and oceanic H2O through reduction by meteoritic iron. To clarify the mechanisms, we imitated the impact events by performing multi-scale shock technique-based ab initio molecular dynamics in the framework of density functional theory in combination with multi-scale shock technique (MSST) simulations...
April 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28435871/recovery-of-an-oxidized-majorite-inclusion-from-earth-s-deep-asthenosphere
#9
Cheng Xu, Jindřich Kynický, Renbiao Tao, Xi Liu, Lifei Zhang, Miroslav Pohanka, Wenlei Song, Yingwei Fei
Minerals recovered from the deep mantle provide a rare glimpse into deep Earth processes. We report the first discovery of ferric iron-rich majoritic garnet found as inclusions in a host garnet within an eclogite xenolith originating in the deep mantle. The composition of the host garnet indicates an ultrahigh-pressure metamorphic origin, probably at a depth of ~200 km. More importantly, the ferric iron-rich majoritic garnet inclusions show a much deeper origin, at least at a depth of 380 km. The majoritic nature of the inclusions is confirmed by mineral chemistry, x-ray diffraction, and Raman spectroscopy, and their depth of origin is constrained by a new experimental calibration...
April 2017: Science Advances
https://www.readbyqxmd.com/read/28434880/ultrasound-assisted-extraction-of-rare-earth-elements-from-carbonatite-rocks
#10
Lisarb O Diehl, Thais L Gatiboni, Paola A Mello, Edson I Muller, Fabio A Duarte, Erico M M Flores
In view of the increasing demand for rare-earth elements (REE) in many areas of high technology, alternative methods for the extraction of these elements have been developed. In this work, a process based on the use of ultrasound for the extraction of REE from carbonatite (an igneous rock) is proposed to avoid the use of concentrated reagents, high temperature and excessive extraction time. In this pioneer work for REE extraction from carbonatite rocks in a preliminary investigation, ultrasonic baths, cup horn systems or ultrasound probes operating at different frequencies and power were evaluated...
April 12, 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28434200/land-use-for-animal-production-in-global-change-studies-defining-and-characterizing-a-framework
#11
Leanne N Phelps, Jed O Kaplan
Land use for animal production influences the earth system in a variety of ways, including local-scale modification to biodiversity, soils, and nutrient cycling; regional changes in albedo and hydrology; and global-scale changes in greenhouse gas and aerosol concentrations. Pasture is furthermore the single most extensive form of land cover, currently comprising about 22 - 26% of the earth's ice-free land surface. Despite the importance and variable expressions of animal production, distinctions among different systems are effectively absent from studies of land use and land cover change...
April 23, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28433931/alkaline-earth-elements-of-scalp-hair-and-presence-of-hypertension-in-housewives-a-perspective-of-chronic-effect
#12
Bin Wang, Lailai Yan, Ying Sun, Jingjing Yan, Qun Lu, Jingxu Zhang, Zhiwen Li
The relationship between population intakes of alkaline-earth elements (AEEs) and hypertension risk remains under discussion. Hair AEE concentrations can indicate their intake levels into human body. Thus, we aimed to investigate an association of hair AEE concentrations with hypertension risk, and the potential effect of dietary habit on this association. We recruited 398 housewives [163 subjects with hypertension (case group) and 235 subjects without hypertension (control group)] in Shanxi Province of north China...
April 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28433875/framing-causal-questions-about-the-past-the-cambrian-explosion-as-case-study
#13
Greg Priest
About 540 million years ago, a rapid radiation of animal phyla radically changed the Earth's biota in a geological eye-blink. What caused this "Cambrian explosion"? Over the years, paleontologists have pointed to a wide array of different physical mechanisms as the causal "trigger" for the explosion. More recently, some paleontologists have proposed complex causal pathways to which multiple physical mechanisms are said to have contributed. Despite their variety, these answers share an assumption that a single explanation can in principle be constructed that identifies some factor or confluence of factors as the cause of the Cambrian explosion...
April 20, 2017: Studies in History and Philosophy of Biological and Biomedical Sciences
https://www.readbyqxmd.com/read/28433768/response-of-evapotranspiration-to-changes-in-land-use-and-land-cover-and-climate-in-china-during-2001-2013
#14
Gen Li, Fangmin Zhang, Yuanshu Jing, Yibo Liu, Ge Sun
Land surface evapotranspiration (ET) is a central component of the Earth's global energy balance and water cycle. Understanding ET is important in quantifying the impacts of human influences on the hydrological cycle and thus helps improving water use efficiency and strengthening water use planning and watershed management. China has experienced tremendous land use and land cover changes (LUCC) as a result of urbanization and ecological restoration under a broad background of climate change. This study used MODIS data products to analyze how LUCC and climate change affected ET in China in the period 2001-2013...
April 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28433608/toward-biotechnology-in-space-high-throughput-instruments-for-in-situ-biological-research-beyond-earth
#15
REVIEW
Fathi Karouia, Kianoosh Peyvan, Andrew Pohorille
Space biotechnology is a nascent field aimed at applying tools of modern biology to advance our goals in space exploration. These advances rely on our ability to exploit in situ high throughput techniques for amplification and sequencing DNA, and measuring levels of RNA transcripts, proteins and metabolites in a cell. These techniques, collectively known as "omics" techniques have already revolutionized terrestrial biology. A number of on-going efforts are aimed at developing instruments to carry out "omics" research in space, in particular on board the International Space Station and small satellites...
April 19, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28433535/bioimaging-and-biodetection-assisted-with-tta-uc-materials
#16
REVIEW
Qingqing Dou, Lu Jiang, Dan Kai, Cally Owh, Xian Jun Loh
Upconversion of light has attracted intensive studies for biomedical research, because it enables deeper [SB1] tissue analysis owing to the longer wavelength of incident light, compared with conventional downconversion fluorescent materials. Triplet-triplet annihilation (TTA), as a typical mechanism of upconversion, does not necessitate high power excitation and exhibits a higher quantum yield than rare earth upconversion owing to more sensitizer options with higher absorption coefficients. A desirable wavelength range of excitation and emission can be realized by careful selection of the combination of sensitizer and activator...
April 19, 2017: Drug Discovery Today
https://www.readbyqxmd.com/read/28432620/cultivating-hope-for-a-better-future-research-contributions-from-young-scholars-in-earth-and-environmental-sciences
#17
EDITORIAL
Peiyue Li, Ken W F Howard, Matthew Currell
No abstract text is available yet for this article.
April 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28432500/walking-over-4-gya-chemical-evolution-from-photochemistry-to-mineral-and-organic-chemistries-leading-to-an-rna-world
#18
REVIEW
Kunio Kawamura, Marie-Christine Maurel
Here we overview the chemical evolution of RNA molecules from inorganic material through mineral-mediated RNA formation compatible with the plausible early Earth environments. Pathways from the gas-phase reaction to the formation of nucleotides, activation and oligomerization of nucleotides, seem to be compatible with specific environments. However, how these steps interacted is not clear since the chemical conditions are frequently different and can be incompatible between them; thus the products would have migrated from one place to another, suitable for further chemical evolution...
April 21, 2017: Origins of Life and Evolution of the Biosphere
https://www.readbyqxmd.com/read/28432328/tactile-flow-overides-other-cues-to-self-motion
#19
Laurence R Harris, Kenzo Sakurai, William H A Beaudot
Vestibular-somatosensory interactions are pervasive in the brain but it remains unclear why. Here we explore the contribution of tactile flow to processing self-motion. We assessed two aspects of self-motion: timing and speed. Participants sat on an oscillating swing and either kept their hands on their laps or rested them lightly on an earth-stationary surface. They viewed a grating oscillating at the same frequency as their motion and judged its phase or, in a separate experiment, its speed relative to their perceived motion...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28431803/reutilization-of-discarded-biomass-for-preparing-functional-polymer-materials
#20
REVIEW
Jianfeng Wang, Wenzhen Qian, Yufeng He, Yubing Xiong, Pengfei Song, Rong-Min Wang
Biomass is abundant and recyclable on the earth, which has been assigned numerous roles to human beings. However, over the past decades, accompanying with the rapid expansion of man-made materials, such as alloy, plastic, synthetic rubber and fiber, a great number of natural materials had been neglected and abandoned, such as straw, which cause a waste of resource and environmental pollution. In this review, based on introducing sources of discarded biomass, the main composition and polymer chains in discarded biomass materials, the traditional treatment and novel approach for reutilization of discarded biomass were summarized...
April 18, 2017: Waste Management
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