keyword
MENU ▼
Read by QxMD icon Read
search

Environmental enrichment

keyword
https://www.readbyqxmd.com/read/28918084/uranium-isotopes-in-tree-bark-as-a-spatial-tracer-of-environmental-contamination-near-former-uranium-processing-facilities-in-southwest-ohio
#1
Elise Conte, Elisabeth Widom, David Kuentz
Inappropriate handling of radioactive waste at nuclear facilities can introduce non-natural uranium (U) into the environment via the air or groundwater, leading to anthropogenic increases in U concentrations. Uranium isotopic analyses of natural materials (e.g. soil, plants or water) provide a means to distinguish between natural and anthropogenic U in areas near sources of radionuclides to the environment. This study examines the utility of two different tree bark transects for resolving the areal extent of U atmospheric contamination using several locations in southwest Ohio that historically processed U...
September 14, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28917608/environmental-enrichment-in-the-absence-of-wheel-running-produces-beneficial-behavioural-and-anti-oxidative-effects-in-rats
#2
F Mármol, J Sánchez, M N Torres, V D Chamizo
The effects of early environmental enrichment (EE) when solving a simple spatial task in adult male rats were assessed. After weaning, rats were housed in pairs in enriched or standard cages (EE and control groups) for two and a half months. Then the rats were trained in a triangular-shaped pool to find a hidden platform whose location was defined in terms of two sources of information, a landmark outside the pool and a particular corner of the pool. As expected, enriched rats reached the platform faster than control animals...
September 13, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28917172/reconstruction-of-atmospheric-trace-metals-pollution-in-southwest-china-using-sediments-from-a-large-and-deep-alpine-lake-historical-trends-sources-and-sediment-focusing
#3
Qi Lin, Enfeng Liu, Enlou Zhang, Bibhash Nath, Ji Shen, Hezhong Yuan, Rong Wang
Atmospheric pollution, one of the leading environmental problems in South and East Asia, and its impact on the terrestrial environmental quality remain poorly understood particularly in alpine areas where both historical and present-day mining and smelting operations might leave an imprint. Here, we reconstructed atmospheric trace metals pollution during the past century using core sediments from a large and deep alpine lake in Southwest China. The implication of in lake and/or in watershed sediment focusing in pollution quantification is discussed by analyzing 15 sediment cores...
September 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28916995/effects-of-environmental-enrichment-on-self-administration-of-the-short-acting-opioid-remifentanil-in-male-rats
#4
Rebecca S Hofford, Jonathan J Chow, Joshua S Beckmann, Michael T Bardo
BACKGROUND: Opioid abuse is a major problem around the world. Identifying environmental factors that contribute to opioid abuse and addiction is necessary for decreasing this epidemic. In rodents, environmental enrichment protects against the development of low dose stimulant self-administration, but studies examining the effect of enrichment and isolation (compared to standard housing) on the development of intravenous opioid self-administration have not been conducted. The present study investigated the role of environmental enrichment on self-administration of the short-acting μ-opioid remifentanil...
September 15, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28916038/a-tri-metal-centered-metal-organic-framework-for-solid-phase-microextraction-of-environmental-contaminants-with-enhanced-extraction-efficiency
#5
Shuqin Liu, Lijun Xie, Qingkun Hu, Huangsheng Yang, Guanrui Pan, Fang Zhu, Shenghong Yang, Gangfeng Ouyang
This study presents the preparation and the characterizations of six tri-metal centered metal-organic frameworks (tM-MOFs) as solid-phase microextraction (SPME) adsorbents. Possessing different proportions of Al, Ga and In atoms in their frameworks, the tM-MOF-based SPME coatings exhibited different extraction performance towards the organic pollutants. Extraction results showed that the M4 (Al0.593Ga0.167In0.240(O2C2H4)(h2fipbb)) coating exhibited the best enrichment ability among six tM-MOFs. In addition, it showed better extraction efficiency towards the analytes than three single-metal centered MOFs coatings and a commercial polydimethylsiloxane (PDMS) coating...
September 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28914047/a-light-triggered-co2-breathing-foam-via-non-surfactant-high-internal-phase-emulsion
#6
Shiming Zhang, Dingguan Wang, Qianhao Pan, Qinyuan Gui, Shenglong Liao, Yapei Wang
Solid materials for CO2 capture and storage have attracted enormous attention for gaseous separation, environmental protection and climate governance. However, their preparation and recovery are meeting the problems of high energy and financial cost. Herein, a light-triggered CO2 capture and storage process is accomplished in an emulsion-templated polymer foam, in which CO2 is breathed-in at dark and breathed-out under light illumination. Such a process is likely to become a relay of natural CO2 capture by plants which on the contrary breathe out CO2 in nights...
September 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28913587/isotopic-effects-of-pce-induced-by-organohalide-respiring-bacteria
#7
Simon Leitner, Harald Berger, Markus Gorfer, Thomas G Reichenauer, Andrea Watzinger
Reductive dechlorination performed by organohalide-respiring bacteria (OHRB) enables the complete detoxification of certain emerging groundwater pollutants such as perchloroethene (PCE). Environmental samples from a contaminated site incubated in a lab-scale microcosm (MC) study enable documentation of such reductive dechlorination processes. As compound-specific isotope analysis is used to monitor PCE degradation processes, nucleic acid analysis-like 16S-rDNA analysis-can be used to determine the key OHRB that are present...
September 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28911867/population-dynamics-of-neural-progenitor-cells-during-aging-in-the-cerebral-cortex
#8
Yuka Okada, Koji Ohira
Recent studies indicate that adult neurogenesis occurs in the cerebral cortex of rodents. Neural progenitor cells (NPCs) have been found in the adult cerebral cortex. These cells are expected to be regulated by various stimuli, including environmental enrichment, exercise, learning, and stress. However, it is unclear what stimuli can regulate cortical NPCs. In this study, we examined whether aging has an impact on population dynamics of NPCs in the murine cerebral cortex, using immunohistological staining for NPCs...
September 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28905629/nanoparticle-and-ionic-zn-promote-nutrient-loading-of-sorghum-grain-under-low-npk-fertilization
#9
Christian Dimkpa, Jason C White, Wade H Elmer, Jorge L Gardea-Torresdey
This study evaluated the effects of ZnO nanoparticles (NP) or Zn salt amendment on sorghum yield, macronutrient use efficiency, and grain Zn-enrichment. Amendments were through soil and foliar pathways, under ''low'' and ''high'' NPK. In soil and foliar amendments, grain yield was significantly (p≤0.05) increased by both Zn types, albeit insignificantly with soil-applied Zn at low NPK. Across NPK levels and Zn exposure pathways, both Zn types increased N and P accumulation relative to control plants. Compared to N and K, both Zn types had a mixed effect on P accumulation, depending on NPK level and Zn exposure pathway, and permitted greater soil P retention...
September 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28904419/fish-scales-as-potential-substrate-for-production-of-alkaline-protease-and-amino-acid-rich-aqua-hydrolyzate-by-bacillus-altitudinis-gvc11
#10
N Harikrishna, S Mahalakshmi, K Kiran Kumar, Gopal Reddy
Fish processing industries generate large quantities of fish scales as processing waste, if not treated leading to environmental pollution. Fish scales are hard to degrade, hence cause difficulty in waste management. In this context present study was made to utilize fish scales as substrate for the production of alkaline protease by Bacillus altitudinis GVC11 and subsequently amino acid rich aqua hydrolyzate. B. altitudinis GVC11 efficiently utilized five types of fish scales as substrates and produced maximum alkaline protease using Labeo rohita (28,150 U/mL) followed by Catla catla (23,320 U/mL) at 48 h and Cyprinus carpio (17,146 U/mL) Mugil cephalus (18,917 U/mL), Cirrhinus mrigala (12,430 U/mL) at 72 h...
September 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/28903555/aldehyde-and-ketone-photoproducts-from-solar-irradiated-crude-oil-seawater-systems-determined-by-esi-ms-ms
#11
Xian Cao, Matthew A Tarr
Aldehyde and ketone photoproducts were observed in the aqueous phase under oil exposed to simulated sunlight by using 2,4-dinitrophenylhydrazine (DNPH) derivatization and electrospray ionization-tandem mass spectrometry (ESI-MS/MS). Oil samples were spread over seawater in a jacketed beaker held at 27.0 °C and exposed to simulated sunlight. The aq. phase was collected after irradiation and derivatized with DNPH, which selectively reacts with aldehydes and ketones. The derivatized hydrazones (aldehyde/ketone-DNPH derivatives) were washed and enriched with a solid phase extraction cartridge prior to analysis by ESI-MS/MS in negative ion mode...
September 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28903553/monitoring-microbial-mineralization-using-reverse-stable-isotope-labelling-analysis-by-mid-infrared-laser-spectroscopy
#12
Xiyang Dong, Maik A Jochmann, Martin Elsner, Armin H Meyer, Leonard E Bäcker, Mona Rahmatullah, Daniel Schunk, Guido Lens, Rainer Udo Meckenstock
Assessing the biodegradation of organic compounds is a frequent question in environmental science. Here, we present a sensitive, inexpensive, and simple approach to monitor microbial mineralization using reverse stable isotope labelling analysis (RIL) of dissolved inorganic carbon (DIC). The medium for the biodegradation assay contains regular organic compounds and (13)C-labelled DIC with (13)C atom fractions (x((13)C)DIC) higher than natural abundance (typically 2-50%). The produced CO2 (x((13)C) ≈ 1.11%) gradually dilutes the initial x((13)C)DIC allowing to quantify microbial mineralization using mass-balance calculations...
September 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28901631/equine-behavioral-enrichment-toys-as-tools-for-non-invasive-recovery-of-viral-and-host-dna
#13
Peter A Seeber, Sanatana E Soilemetzidou, Marion L East, Chris Walzer, Alex D Greenwood
Direct collection of samples from wildlife can be difficult and sometimes impossible. Non-invasive remote sampling for the purpose of DNA extraction is a potential tool for monitoring the presence of wildlife at the individual level, and for identifying the pathogens shed by wildlife. Equine herpesviruses (EHV) are common pathogens of equids that can be fatal if transmitted to other mammals. Transmission usually occurs by nasal aerosol discharge from virus-shedding individuals. The aim of this study was to validate a simple, non-invasive method to track EHV shedding in zebras and to establish an efficient protocol for genotyping individual zebras from environmental DNA (eDNA)...
September 12, 2017: Zoo Biology
https://www.readbyqxmd.com/read/28900747/transcriptome-analysis-and-identification-of-significantly-differentially-expressed-genes-in-holstein-calves-subjected-to-severe-thermal-stress
#14
Krishnamoorthy Srikanth, Eunjin Lee, Anam Kwan, Youngjo Lim, Junyep Lee, Gulwon Jang, Hoyoung Chung
RNA-Seq analysis was used to characterize transcriptome response of Holstein calves to thermal stress. A total of eight animals aged between 2 and 3 months were randomly selected and subjected to thermal stress corresponding to a temperature humidity index of 95 in an environmentally controlled house for 12 h consecutively for 3 days. A set of 15,787 unigenes were found to be expressed and after a threshold of threefold change, and a Q value <0.05; 502, 394, and 376 genes were found to be differentially expressed on days 1, 2, and 3 out of which 343, 261 and 256 genes were upregulated and 159, 133, and 120 genes were downregulated...
September 12, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28900110/enhancement-of-environmental-hazard-degradation-in-the-presence-of-lignin-a-proteomics-study
#15
Su Sun, Shangxian Xie, Yanbing Cheng, Hongbo Yu, Honglu Zhao, Muzi Li, Xiaotong Li, Xiaoyu Zhang, Joshua S Yuan, Susie Y Dai
Proteomics studies of fungal systems have progressed dramatically based on the availability of more fungal genome sequences in recent years. Different proteomics strategies have been applied toward characterization of fungal proteome and revealed important gene functions and proteome dynamics. Presented here is the application of shot-gun proteomic technology to study the bio-remediation of environmental hazards by white-rot fungus. Lignin, a naturally abundant component of the plant biomass, is discovered to promote the degradation of Azo dye by white-rot fungus Irpex lacteus CD2 in the lignin/dye/fungus system...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28892512/grape-microbiome-as-a-reliable-and-persistent-signature-of-field-origin-and-environmental-conditions-in-cannonau-wine-production
#16
Valerio Mezzasalma, Anna Sandionigi, Ilaria Bruni, Antonia Bruno, Gianni Lovicu, Maurizio Casiraghi, Massimo Labra
Grape berries harbor a wide range of microbes originating from the vineyard environment, many of which are recognized for their role in the must fermentation process shaping wine quality. To better clarify the contribution of the microbiome of grape fruits during wine fermentation, we used high-throughput sequencing to identify bacterial and fungi communities associated with berries and musts of Cannonau. This is the most important cultivar-wine of Sardinia (Italy) where most vineyards are cultivated without phytochemical treatments...
2017: PloS One
https://www.readbyqxmd.com/read/28891003/contaminant-characteristics-and-environmental-risk-assessment-of-heavy-metals-in-the-paddy-soils-from-lead-pb-zinc-zn-mining-areas-in-guangdong-province-south-china
#17
Da-Mao Xu, Bo Yan, Tao Chen, Chang Lei, Han-Zhi Lin, Xian-Ming Xiao
In November 2016, the total metal concentrations in nine representative locations in lead (Pb)-zinc (Zn) mining areas, located in Guangdong Province, South China, were determined experimentally by flame atomic absorption spectrometer. The results indicated that the paddy soils were heavily contaminated with Cd (20.25 mg kg(-1)), Pb (1093.03 mg kg(-1)), and Zn (867.0 mg kg(-1)), exceeding their corresponding soil quality standard values and background values. According to the results, the mean enrichment factor levels of the studied metals decreased in the following order: Cd > Zn > Pb > Cu > Ni > Mn > Cr...
September 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28890501/novel-uniform-fe3o4-hollow-spheres-for-magnetic-solid-phase-extraction-of-polycyclic-aromatic-hydrocarbons
#18
Jiangbo Xi, Juan Zhang, Haiyan Zhao
A novel magnetic absorbent based on Fe3O4 hollow nanospheres was developed for polycyclic aromatic hydrocarbons (PAHs) extraction. Fe3O4 hollow nanospheres were prepared by a one-pot facile solvothermal method and its structural properties were characterized by scanning electron microscope (SEM) and analyzer transmission electron microscopy (TEM). It was the first time to use hollow nanospheres which possess high special surface area for magnetic solid-phase extraction (MSPE). The extraction condition of Fe3O4 hollow nanospheres and its performance for PAHs was systematically investigated...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28888640/a-bovine-botulism-outbreak-associated-with-a-suspected-cross-contamination-from-a-poultry-farm
#19
R Souillard, C Le Maréchal, V Ballan, F Mahé, M Chemaly, S Le Bouquin
In October 2014, an outbreak of botulism type D/C occurred on two cattle farms in close proximity. A poultry farm located nearby with no history of botulism had transferred poultry manure to both bovine farms before the beginning of the outbreak. Given this context, epidemiological investigation was conducted to determine if the poultry farm was a reservoir of C. botulinum type D/C and to identify the source of contamination on the cattle farms. Environmental samples were collected at three houses on the poultry farm (boot swabs from the surroundings, swabs from the ventilation system, boot swabs from the poultry litter and darkling beetles samples), and on the two cattle farms (silage samples, boot swabs from the cattle stalls, boot swabs from the cattle pasture and poultry manure samples)...
September 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28886108/the-potential-role-of-genetic-assimilation-during-maize-domestication
#20
Anne Lorant, Sarah Pedersen, Irene Holst, Matthew B Hufford, Klaus Winter, Dolores Piperno, Jeffrey Ross-Ibarra
Domestication research has largely focused on identification of morphological and genetic differences between extant populations of crops and their wild relatives. Little attention has been paid to the potential effects of environment despite substantial known changes in climate from the time of domestication to modern day. In recent research, the exposure of teosinte (i.e., wild maize) to environments similar to the time of domestication, resulted in a plastic induction of domesticated phenotypes in teosinte...
2017: PloS One
keyword
keyword
22368
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"