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https://www.readbyqxmd.com/read/28527375/surfactant-enhanced-remediation-of-polycyclic-aromatic-hydrocarbons-a-review
#1
REVIEW
Shanti Lamichhane, K C Bal Krishna, Ranjan Sarukkalige
Polycyclic aromatic hydrocarbons (PAHs) are toxic, mutagenic and carcinogenic organic compounds that are widely present in the environment. The bioremediation of PAHs is an economical and environmentally friendly remediation technique, but it is limited because PAHs have low water solubility and fewer bioavailable properties. The solubility and bioavailability of PAHs can be increased by using surfactants to reduce surface tension and interfacial tension; this method is called surfactant-enhanced remediation (SER)...
May 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28527323/revealing-the-ability-of-a-novel-polysaccharide-bioflocculant-in-bioremediation-of-heavy-metals-sensed-in-a-vibrio-bioluminescence-reporter-assay
#2
Arya Sajayan, G Seghal Kiran, S Priyadharshini, Navya Poulose, Joseph Selvin
A bioflocculant-producing bacterial strain, designated MSI021, was isolated from the marine sponge Dendrilla nigra and demonstrated 94% flocculation activity in a kaolin clay suspension. MSI021 was identified as Bacillus cereus based on phylogenetic affiliation and biochemical characteristics. The purified extra-cellular bioflocculant was chemically elucidated as a polysaccharide molecule. The polysaccharide bioflocculant was stable under both acidic and alkaline conditions (pH 2.0-10.0) and temperatures up to 100 °C...
May 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28527179/making-time-conservation-of-biological-clocks-from-fungi-to-animals
#3
Jay C Dunlap, Jennifer J Loros
The capacity for biological timekeeping arose at least three times through evolution, in prokaryotic cyanobacteria, in cells that evolved into higher plants, and within the group of organisms that eventually became the fungi and the animals. Neurospora is a tractable model system for understanding the molecular bases of circadian rhythms in the last of these groups, and is perhaps the most intensively studied circadian cell type. Rhythmic processes described in fungi include growth rate, stress responses, developmental capacity, and sporulation, as well as much of metabolism; fungi use clocks to anticipate daily environmental changes...
May 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28527152/socioenvironmental-factors-associated-with-heat-and-cold-related-mortality-in-vadu-hdss-western-india-a-population-based-case-crossover-study
#4
Vijendra Ingole, Sari Kovats, Barbara Schumann, Shakoor Hajat, Joacim Rocklöv, Sanjay Juvekar, Ben Armstrong
Ambient temperatures (heat and cold) are associated with mortality, but limited research is available about groups most vulnerable to these effects in rural populations. We estimated the effects of heat and cold on daily mortality among different sociodemographic groups in the Vadu HDSS area, western India. We studied all deaths in the Vadu HDSS area during 2004-2013. A conditional logistic regression model in a case-crossover design was used. Separate analyses were carried out for summer and winter season...
May 19, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28527138/application-of-hyper-branched-rolling-circle-amplification-hrca-and-hrca-based-strip-test-for-the-detection-of-chattonella-marina
#5
Xiaoli Nie, Chunyun Zhang, Yuanyuan Wang, Changlu Guo, Jin Zhou, Guofu Chen
Harmful algal blooms (HABs) are global threats to marine ecosystems, fisheries, and human health. Therefore, developing effective and accurate methods for identifying causative algae and monitoring seawater quality is urgent. However, traditional, microscopy-based methods are complex, inaccurate, and time-consuming. Here, we present a novel method for effective and sensitive detection of Chattonella marina using hyper-branched rolling circle amplification (HRCA) and HRCA-based strip test (HBST). The large subunit (LSU) ribosomal DNA (rDNA) D1-D2 region of C...
May 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28527126/polycaprolactone-based-nanoparticles-loaded-with-indomethacin-for-anti-inflammatory-therapy-from-preparation-to-ex-vivo-study
#6
Waisudin Badri, Karim Miladi, Sophie Robin, Céline Viennet, Qand Agha Nazari, Géraldine Agusti, Hatem Fessi, Abdelhamid Elaissari
PURPOSE: This work focused on the preparation of polycaprolactone based nanoparticles containing indomethacin to provide topical analgesic and anti-inflammatory effect for symptomatic treatment of inflammatory diseases. Indomethacin loaded nanoparticles are prepared for topical application to decrease indomethacin side effects and administration frequency. Oppositely to already reported works, in this research non-invasive method has been used for the enhancement of indomethacin dermal drug penetration...
May 19, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28527037/frequency-voltage-controlled-light-transmittance-in-ferroelectric-liquid-crystal-cells
#7
Aleksey A Kudreyko, Nail G Migranov, Olga V Bachurina, Song Wanqing
Light transmittance of a short-pitch deformed-helix ferroelectric liquid crystal cell was numerically studied when low and high voltage frequencies ([Formula: see text] kHz and [Formula: see text] kHz, respectively) are applied to the cell. The reported finding in the decay of light transmittance at increasing frequency is obtained due to reasonable simplifications of the temporal dependence of director's azimuthal angle. By taking experimentally known data, we numerically demonstrate that the increase in temperature of ferroelectric liquid crystals yields an insignificant change of light transmittance within all visible spectra...
May 2017: European Physical Journal. E, Soft Matter
https://www.readbyqxmd.com/read/28526914/finite-element-method-simulating-temperature-distribution-in-skin-induced-by-980-nm-pulsed-laser-based-on-pain-stimulation
#8
Han Wang, Xiao-Xi Dong, Ji-Chun Yang, He Huang, Ying-Xin Li, Hai-Xia Zhang
For predicting the temperature distribution within skin tissue in 980-nm laser-evoked potentials (LEPs) experiments, a five-layer finite element model (FEM-5) was constructed based on Pennes bio-heat conduction equation and the Lambert-Beer law. The prediction results of the FEM-5 model were verified by ex vivo pig skin and in vivo rat experiments. Thirty ex vivo pig skin samples were used to verify the temperature distribution predicted by the model. The output energy of the laser was 1.8, 3, and 4.4 J. The laser spot radius was 1 mm...
May 19, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28526909/retraction-note-to-the-interaction-effects-of-temperature-and-humidity-on-emergency-room-visits-for-respiratory-diseases-in-beijing-china
#9
Q Su, H Liu, X Yuan, X Zhang, W Dang, J Zhang, Y Qin, B Men, X Zhao, Y Xiao, R Sun
No abstract text is available yet for this article.
May 20, 2017: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28526881/biosorption-performance-of-encapsulated-candida-krusei-for-the-removal-of-copper-ii
#10
Chi Him Jim Luk, Joanne Yip, Chun Wah Marcus Yuen, Siu Kwong Pang, Kim Hung Lam, Chi Wai Kan
The use of microorganisms in biosorption is one of the most promising ways to remove trace amounts of heavy metal ions. Nevertheless, the enhancement of the successful removal of heavy metal ions by using different combinations of biosorbents is not generally guaranteed which leaves room to explore the application of the technique. In this study, the performance of free and immobilized forms of a yeast strain, Candida krusei (C. krusei), and calcium alginate (CaAlg) are evaluated for their ability to remove copper(II)...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526876/inductive-flash-annealing-of-bulk-metallic-glasses
#11
K Kosiba, S Pauly
We developed a temperature-controlled inductive flash-annealing device, which heats bulk metallic glasses (BMGs) at defined rates of up to 200 K/s to a given temperature. Subsequent instantaneous quenching in water allows preserving the microstructures obtained at various stages of crystallization. One Zr-based and two CuZr-based BMGs were flash-annealed at the onset of crystallization with different heating rates in order to prepare advanced BMG-matrix composites. The highly reproducible composite microstructures contain uniformly dispersed crystals and a narrow crystal size distribution...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526872/seasonal-soil-microbial-responses-are-limited-to-changes-in-functionality-at-two-alpine-forest-sites-differing-in-altitude-and-vegetation
#12
José A Siles, Rosa Margesin
The study of soil microbial responses to environmental changes is useful to improve simulation models and mitigation strategies for climate change. We here investigated two Alpine forest sites (deciduous forest vs. coniferous forest) situated at different altitudes (altitudinal effect) in spring and autumn (seasonal effect) regarding: (i) bacterial and fungal abundances (qPCR); (ii) diversity and structure of bacterial and fungal communities (amplicon sequencing); and (iii) diversity and composition of microbial functional gene community (Geochip 5...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526857/room-temperature-soft-mode-and-ferroelectric-like-polarization-in-srtio3-ultrathin-films-infrared-and-ab-initio-study
#13
Wei-Wei Peng, Robert Tétot, Gang Niu, Emilie Amzallag, Bertrand Vilquin, Jean-Blaise Brubach, Pascale Roy
Due to the remarkable possibilities of epitaxially growing strontium titanate (SrTiO3 or STO) on silicon, this oxide is widely used as a buffer layer for integrating other perovskite oxides which allows for the development of various functional electronic devices on silicon. Moreover, STO is known to be an incipient ferroelectric in bulk but may become ferroelectric when in the form of strained ultrathin films. Given the importance of the potential applications for electronics if this property is demonstrated, we performed a spectroscopic study of STO on Si(001) templates coupling experimental and ab initio investigations...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526853/response-of-coral-calcification-and-calcifying-fluid-composition-to-thermally-induced-bleaching-stress
#14
J P D'Olivo, M T McCulloch
Severe, global-scale thermal stress events like those of 1998 and 2016, are becoming more frequent and intense, potentially compromising the future of coral reefs. Here we report the effects of the 1998 bleaching event on coral calcification as well as the composition of the calcifying fluid (cf) from which corals precipitate their calcium carbonate skeletons. This was investigated by using the Sr/Ca, Li/Mg (temperature), and boron isotopes (δ(11)B) and B/Ca (carbonate chemistry) proxies in a Porites sp. coral...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526851/characterization-of-trpa-channels-in-the-starfish-patiria-pectinifera-involvement-of-thermally-activated-trpa1-in-thermotaxis-in-marine-planktonic-larvae
#15
Shigeru Saito, Gen Hamanaka, Narudo Kawai, Ryohei Furukawa, Jun Gojobori, Makoto Tominaga, Hiroyuki Kaneko, Yoko Satta
The vast majority of marine invertebrates spend their larval period as pelagic plankton and are exposed to various environmental cues. Here we investigated the thermotaxis behaviors of the bipinnaria larvae of the starfish, Patiria pectinifera, in association with TRPA ion channels that serve as thermal receptors in various animal species. Using a newly developed thermotaxis assay system, we observed that P. pectinifera larvae displayed positive thermotaxis toward high temperatures, including toward temperatures high enough to cause death...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526848/room-temperature-magnetism-in-carbon-dots-and-enhanced-ferromagnetism-in-carbon-dots-polyaniline-nanocomposite
#16
Jian Liu, Hong Bi, Paulo Cesar Morais, Xiang Zhang, Fapei Zhang, Lin Hu
Room temperature magnetic ordering is reported for very small carbon dots (CDs), mat-like polyaniline nanofibers (Mat-PANI) and a composite of CDs@Mat-PANI containing 0.315 wt% CDs. We have found saturation magnetization (M S ) of CDs, Mat-PANI and CDs@Mat-PANI at 5 (20/300) K equals to 0.0079 (0.0048/0.0019), 0.0116 (0.0065/0.0055) and 0.0349 (0.0085/0.0077) emu/g, respectively. The M S enhancement in CDs@Mat-PANI (200% and 40% at 5 K and 300 K, respectively) is attributed to electron transfer from Mat-PANI imine N-atoms to the encapsulated CDs...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526840/in-situ-stem-imaging-of-growth-and-phase-change-of-individual-cualx-precipitates-in-al-alloy
#17
Chunhui Liu, Sairam K Malladi, Qiang Xu, Jianghua Chen, Frans D Tichelaar, Xiaodong Zhuge, Henny W Zandbergen
Age-hardening in Al alloys has been used for over a century to improve its mechanical properties. However, the lack of direct observation limits our understanding of the dynamic nature of the evolution of nanoprecipitates during age-hardening. Using in-situ (scanning) transmission electron microscopy (S/TEM) while heating an Al-Cu alloy, we were able to follow the growth of individual nanoprecipitates at atomic scale. The heat treatments carried out at 140, 160, 180 and 200 °C reveal a temperature dependence on the kinetics of precipitation and three kinds of interactions of nano-precipitates...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526665/the-sensor-study-protocol-for-a-mixed-methods-study-of-self-management-checks-to-predict-exacerbations-of-pseudomonas-aeruginosa-in-patients-with-long-term-respiratory-conditions
#18
Claire Roberts, Thomas L Jones, Samal Gunatilake, Will Storrar, Scott Elliott, Sharon Glaysher, Ben Green, Steven Rule, Carole Fogg, Ann Dewey, Kevin A Auton, Anoop J Chauhan
BACKGROUND: There are an estimated three million people in the United Kingdom with chronic obstructive pulmonary disease (COPD), and the incidence of bronchiectasis is estimated at around 0.1% but is more common in COPD and severe asthma. Both COPD and bronchiectasis are characterized by exacerbations in which bacteria play a central role. Pseudomonas aeruginosa is isolated from sputum samples from 4% to 15% of adults with COPD and is more likely to be isolated from patients with severe disease...
May 19, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28526480/human-seasonal-and-circadian-studies-in-antarctica-halley-75-0-s
#19
Josephine Arendt, Benita Middleton
Living for extended periods in Antarctica exposes base personnel to extremes of daylength (photoperiod) and temperature. At the British Antarctic Survey base of Halley, 75(0)S, the sun does not rise for 110 d in the winter and does not set for 100 d in summer. Photoperiod is the major time cue governing the timing of seasonal events such as reproduction in many species. The neuroendocrine signal providing photoperiodic information to body physiology is the duration of melatonin secretion which reflects the length of the night: longer in the short days of winter and shorter in summer...
May 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28526443/mechanical-properties-of-polymer-infiltrated-ceramic-sodium-aluminum-silicate-composites-for-dental-restoration
#20
Bencang Cui, Jing Li, Huining Wang, Yuanhua Lin, Yang Shen, Ming Li, Xuliang Deng, Cewen Nan
OBJECTIVE: To fabricate indirect restorative composites for CAD/CAM applications and evaluate the mechanical properties. METHODS: Polymer-infiltrated-ceramic composites were prepared through infiltrating polymer into partially sintered sodium aluminum silicate ceramic blocks and curing. The corresponding samples were fabricated according to standard ISO-4049 using for mechanical properties measurement. The flexural strength and fracture toughness were measured using a mechanical property testing machine...
May 16, 2017: Journal of Dentistry
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