keyword
MENU ▼
Read by QxMD icon Read
search

Biomass

keyword
https://www.readbyqxmd.com/read/28647878/selection-of-zygosaccharomyces-rouxii-strains-resistant-to-cadmium-with-improved-removal-abilities-through-ultraviolet-diethyl-sulfate-cooperative-mutagenesis
#1
Yu Liu, Ying Xu, Dongfeng Wang, Wei Jiang
Cd(2+) resistance and bioaccumulation capacity were selected from parental Zygosaccharomyces rouxii (CRZ-0) while maintaining NaCl tolerance using protoplast mutagenesis technology. Ultraviolet-diethyl sulfate (UV-DES) cooperative mutagenesis, followed by preliminary screening and rescreening, was used to select the mutant strain CRZ-9. CRZ-9 grew better than CRZ-0 in YPD medium with 20 or 50 mg L(-1) of Cd(2+). Scanning electron microscopy observations and flow cytometry tests indicated that CRZ-9 was more effective at eliminating reactive oxygen species (ROS) generated by Cd(2+), which led to less cellular structural damage and lower lethality...
June 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28647606/role-of-streptomyces-pactum-in-phytoremediation-of-trace-elements-by-brassica-juncea-in-mine-polluted-soils
#2
Amjad Ali, Di Guo, Amanullah Mahar, Zhen Wang, Dost Muhammad, Ronghua Li, Ping Wang, Feng Shen, Quanhong Xue, Zengqiang Zhang
The industrial expansion, smelting, mining and agricultural practices have increased the release of toxic trace elements (TEs) in the environment and threaten living organisms. The microbe-assisted phytoremediation is environmentally safe and provide an effective approach to remediate TEs contaminated soils. A pot experiment was conducted to test the potential of an Actinomycete, subspecies Streptomyces pactum (Act12) along with medical stone compost (MSC) by growing Brassica juncea in smelter and mines polluted soils of Feng County (FC) and Tongguan (TG, China), respectively...
June 22, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28647581/development-of-field-applicable-tests-for-rapid-and-sensitive-detection-of-candidatus-phytoplasma-oryzae
#3
Lillian Wambua, Bernd Schneider, Allan Okwaro, Joseph Odhiambo Wanga, Olive Imali, Peninah Nduku Wambua, Lavender Agutu, Cassandra Olds, Chris Stephen Jones, Daniel Masiga, Charles Midega, Zeyaur Khan, Joerg Jores, Anne Fischer
Napier grass Stunt Disease (NSD) is a severe disease of Napier grass (Pennisetum purpureum) in Eastern Africa, caused by the leafhopper-transmitted bacterium Candidatus Phytoplasma oryzae. The pathogen severely impairs the growth of Napier grass, the major fodder for dairy cattle in Eastern Africa. NSD is associated with biomass losses of up to 70% of infected plants. Diagnosis of NSD is done by nested PCR targeting the phytoplasma DNA, which is difficult to perform in developing countries with little infrastructure...
June 21, 2017: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/28647321/development-of-large-scale-and-economic-ph-control-system-for-outdoor-cultivation-of-microalgae-haematococcus-pluvialis-using-industrial-flue-gas
#4
Yoon Young Choi, Jae Min Joun, Jeewon Lee, Min Eui Hong, Hoang-Minh Pham, Won Seok Chang, Sang Jun Sim
The aim of this study was to develop the economic and effective buffer system for microalgae mass cultivation using industrial flue gas. Due to the continuous flue gas supplement, culture media acidified, therefore cell growth inhibited. Although buffering agent was added, this result increase in cost for overall culture process. Therefore combined buffer system of bicarbonate and phosphate (BP) for large-scale use was investigated. The bicarbonate buffer system generated from CO2 dissolution, additionally phosphate buffer system improves the buffer performance under the continuous CO2 supplementation from flue gas...
May 26, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28647270/polycyclic-aromatic-hydrocarbons-in-ambient-air-surface-soil-and-wheat-grain-near-a-large-steel-smelting-manufacturer-in-northern-china
#5
Weijian Liu, Yilong Wang, Yuanchen Chen, Shu Tao, Wenxin Liu
The total concentrations and component profiles of polycyclic aromatic hydrocarbons (PAHs) in ambient air, surface soil and wheat grain collected from wheat fields near a large steel-smelting manufacturer in Northern China were determined. Based on the specific isomeric ratios of paired species in ambient air, principle component analysis and multivariate linear regression, the main emission source of local PAHs was identified as a mixture of industrial and domestic coal combustion, biomass burning and traffic exhaust...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647267/relationship-between-nutrients-and-plankton-biomass-in-the-turbidity-maximum-zone-of-the-pearl-river-estuary
#6
Zhen Shi, Jie Xu, Xiaoping Huang, Xia Zhang, Zhijian Jiang, Feng Ye, Ximei Liang
Nutrients, dissolved and particulate organic carbon and plankton (bacterio-, phyto- and zoo-) were compared in the turbidity maximum zone (TMZ) and adjacent areas (non-TMZ) in the Pearl River estuary. Our results showed that high levels of suspended substances had marked effect on dynamics of nutrients and plankton in the TMZ. Based on the cluster analysis of total suspended solids (TSS) concentrations, all stations were divided into two groups, TMZ with average TSS of 171mg/L and non-TMZ of 45mg/L. Suspended substances adsorbed PO4(3-) and dissolved organic carbon, resulting in higher particulate phosphorus and organic carbon (POC) and lower PO4(3-) and DOC in the TMZ, compared to the non-TMZ...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647265/evaluation-of-co-metabolic-removal-of-trichloroethylene-in-a-biotrickling-filter-under-acidic-conditions
#7
Dhawal Chheda, George A Sorial
This study investigated the removal of hydrophobic trichloroethylene (TCE) in the presence of methanol (co-metabolite) in a biotrickling filter, which was seeded with fungi at pH4. Starvation was chosen as the biomass control strategy. Two systems, Biofilter I (methanol:TCE 70:30) and Biofilter II (methanol:TCE 80:20) were run in parallel, each with varying composition ratios. The TCE loading rates for both biofilters ranged from 3.22 to 12.88g/m(3)/hr. Depending on the ratio, methanol concentrations varied from 4...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647258/influence-of-haze-pollution-on-water-soluble-chemical-species-in-pm2-5-and-size-resolved-particles-at-an-urban-site-during-fall
#8
Geun-Hye Yu, Yan Zhang, Sung-Yong Cho, Seungshik Park
To investigate the influence of haze on the chemical composition and formation processes of ambient aerosol particles, PM2.5 and size-segregated aerosol particles were collected daily during fall at an urban site of Gwangju, Korea. During the study period, the total concentration of secondary ionic species (SIS) contributed an average of 43.9% to the PM2.5, whereas the contribution of SIS to the PM2.5 during the haze period was 62.3%. The NO3(-) and SO4(2-) concentrations in PM2.5 during the haze period were highly elevated, being 13...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647247/spatial-variability-and-possible-sources-of-acetate-and-formate-in-the-surface-snow-of-east-antarctica
#9
Gautami Samui, Runa Antony, Kanthanathan Mahalinganathan, Meloth Thamban
Spatial trends of acetate (Ac(-)) and formate (Fo(-)) were determined in surface snow samples along a coastal-inland transect (180km) in the ice cap region at Princess Elizabeth Land and along a coastal transect in the Amery Ice Shelf (130km), East Antarctica. Variations in both Ac(-) and Fo(-) seem to be unrelated to the acidity of snow. Ionic balance determined for the snow samples indicate the availability of HNO3 that could undergo photolysis to produce hydroxyl radical (OH), one of the major reactants involved in oxidation reactions with organic matter...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647231/simultaneous-elimination-of-cyanotoxins-and-pcbs-via-mechanical-collection-of-cyanobacterial-blooms-an-application-of-green-bioadsorption-concept
#10
Wei Chen, Yunlu Jia, Anyue Liu, Qichao Zhou, Lirong Song
In this study, the distribution, transfer and fate of both polychlorinated biphenyls (PCBs) and cyanotoxins via phytoplankton routes were systematically investigated in two Chinese lakes. Results indicated that PCB adsorption/bioaccumulation dynamics has significantly positive correlations with the biomass of green alga and diatoms. Total lipid content of phytoplankton is the major factor that influences PCB adsorption/bioaccumulation. Cyanobacterial blooms with relatively lower lipid content could also absorb high amount of PCBs due to their high cell density in the water columns, and this process was proposed as major route for the transfer of PCBs in Chinese eutrophic freshwater...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647223/fluid-dynamics-model-on-fluidized-bed-gasifier-using-agro-industrial-biomass-as-fuel
#11
Tamer M Ismail, M Abd El-Salam, Eliseu Monteiro, Abel Rouboa
The present study shows the experimental and numerical results of thermal gasification of biomass, on the energy potential of agro-industrial waste from the Portalegre region. Gasification tests were performed in a pilot-scale fluidized bed gasifier, in order to study the behavior of peach stones and miscanthus to investigate the effect of gasification temperatures at 750°C, 800°C and 850°C at a constant biomass flow rate of 45kg/h. In order to optimize the operating conditions of the biomass gasification process, a numerical model is developed namely COMMENT code...
June 21, 2017: Waste Management
https://www.readbyqxmd.com/read/28647222/soil-application-of-sewage-sludge-stabilized-with-steelmaking-slag-and-its-effect-on-soil-properties-and-wheat-growth
#12
Eftihia Samara, Theodora Matsi, Athanasios Balidakis
The effect of sewage sludge, stabilized with steelmaking slag, on soil chemical properties and fertility and on wheat (Triticum aestivum L.) growth was evaluated. Dewatered sewage sludge [75% (wet weight basis)] stabilized with steelmaking slag (25%) and three soils with different pH values were used in a pot experiment with winter wheat. The following treatments were applied: (i) sludge addition of 30gkg(-1) (≈ 120Mgha(-1), rate equivalent to the common inorganic N fertilization for wheat, based on sludge's water soluble NO3-N), (ii) sludge addition of 10gkg(-1) (≈ 40Mgha(-1), rate equivalent to the common inorganic N fertilization for wheat, based on sludge's Kjeldahl-N), (iii) addition of the common inorganic N fertilization for wheat (120kgNha(-1)) as NH4NO3, (iv) control (no fertilizer, no sludge)...
June 21, 2017: Waste Management
https://www.readbyqxmd.com/read/28647154/synergistic-negative-effects-of-small-sized-benthivorous-fish-and-nitrogen-loading-on-the-growth-of-submerged-macrophytes-relevance-for-shallow-lake-restoration
#13
Jiao Gu, Hu He, Hui Jin, Jinlei Yu, Erik Jeppesen, Robert W Nairn, Kuanyi Li
Rapid recruitment of small fish after biomanipulation in warm lakes may delay the reestablishment of submerged macrophytes, not least at high nutrient concentrations. Success has recently been obtained in controlling phosphorus (P) loading to many lakes, but nitrogen (N) inputs often remain high. To determine the interactive effects of N loading and the abundance of small-sized fish on the growth of the submerged macrophyte Vallisneria natans, we conducted an outdoor mesocosm experiment with a factorial design on the north shore of Lake Taihu, China...
June 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28647123/zinc-solubilizing-bacillus-spp-potential-candidates-for-biofortification-in-maize
#14
Muhammad Zahid Mumtaz, Maqshoof Ahmad, Moazzam Jamil, Tanveer Hussain
Bioaugmentation of Zn solubilizing rhizobacteria could be a sustainable intervention to increase bioavailability of Zn in soil which can be helpful in mitigation of yield loss and malnutrition of zinc. In present study, a number of pure rhizobacterial colonies were isolated from maize rhizosphere and screened for their ability to solubilize zinc oxide. These isolates were screened on the basis of zinc and phosphate solubilization, IAA production, protease production, catalase activity and starch hydrolysis...
September 2017: Microbiological Research
https://www.readbyqxmd.com/read/28646775/consequences-of-intensive-forest-harvesting-on-the-recovery-of-swedish-lakes-from-acidification-and-on-critical-load-exceedances
#15
Filip Moldan, Johanna Stadmark, Jens Fölster, Sara Jutterström, Martyn N Futter, Bernard J Cosby, Richard F Wright
Across much of the northern hemisphere, lakes are at risk of re-acidification due to incomplete recovery from historical acidification and pressures associated with more intensive forest biomass harvesting. Critical load (CL) calculations aimed at estimating the amount of pollutants an ecosystem can receive without suffering adverse consequences are dependent on these factors. Here, we present a modelling study of the potential effects of intensified forest harvesting on re-acidification of a set of 3239 Swedish lakes based on scenarios with varying intensities of forest biomass harvest and acid deposition...
June 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28646572/general-fate-model-for-microconstituents-in-an-activated-sludge-system
#16
Bahman Banihashemi
Nine lab-scale continuous flow porous-pot bioreactors operating at various solids retention times and hydraulic retention times were conducted to simulate activated sludge (AS) systems and to evaluate the biodegradation kinetic models for the fate of 17α-ethinylestradiol (EE2), bisphenol-A (BPA), and triclosan (TCS) at the µg/L range. Mathematical models were applied to describe the degradation mechanism of selected microconstituents (MCs) and pseudo second-order model were found to best fit the results when active MCs degraders (XC) were used (r2= 0...
June 16, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28646332/a-rational-approach-for-the-improvement-of-biomass-production-and-lipid-profile-in-cacao-cell-suspensions
#17
Adriana María Gallego Rúa, Luisa Fernanda Rojas, Aura Ines Urrea Trujillo, Oriana Parra Zuleta, Cristian David Correa Alvarez, Lucía Atehortúa Garcés
Cocoa butter (CB) is produced in the seeds of Theobroma cacao representing 50% of its dry weight. The lipid composition plays an important role in the physicochemical, rheological, and sensory properties of the CB, making this fat a valuable resource for the production of chocolates, cosmetics, and pharmaceuticals. In this paper, are described experimental strategies used for a rational improvement of biomass production and fatty acids in cacao cell suspension cultures. First, the lipid profile in four cacao varieties is characterized, and then, one variety is selected to induce cell suspensions using a direct method without previous establishment of a callus phase...
June 23, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28646312/silicon-and-rhizophagus-irregularis-potential-candidates-for-ameliorating-negative-impacts-of-arsenate-and-arsenite-stress-on-growth-nutrient-acquisition-and-productivity-in-cajanus-cajan-l-millsp-genotypes
#18
Neera Garg, Lakita Kashyap
Arsenic (As) gets accumulated in plants via phosphorous transporters and water channels and interferes with nutrient and water uptake, adversely affecting growth and productivity. Although, Si and AM have been reported to combat arsenic stress, their comparative and interactive roles in ameliorating As V and As III toxicities have not been reported. Study evaluated effects of Si and Rhizophagus irregularis on growth, As uptake and yield under arsenate and arsenite stress in two pigeonpea genotypes (metal tolerant-Pusa 2002 and metal sensitive-Pusa 991)...
June 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28646299/effective-combined-water-and-sideband-suppression-for-low-speed-tissue-and-in-vivo-mas-nmr
#19
Yalda Liaghati Mobarhan, Jochem Struppe, Blythe Fortier-McGill, André J Simpson
High-resolution magic angle spinning (HR-MAS) NMR is a powerful technique that can provide metabolic profiles and structural constraints on intact biological and environmental samples such as cells, tissues and living organisms. However, centripetal force from fast spinning can lead to a loss of sample integrity. In analyses focusing on structural organization, metabolite compartmentalization or in vivo studies, it is critical to keep the sample intact. As such, there is growing interest in slow spinning studies that preserve sample longevity...
June 23, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28646198/spatiotemporal-dynamics-of-grassland-aboveground-biomass-on-the-qinghai-tibet-plateau-based-on-validated-modis-ndvi
#20
Shiliang Liu, Fangyan Cheng, Shikui Dong, Haidi Zhao, Xiaoyun Hou, Xue Wu
Spatiotemporal dynamics of aboveground biomass (AGB) is a fundamental problem for grassland environmental management on the Qinghai-Tibet Plateau (QTP). Moderate Resolution Imaging Spectroradiometer (MODIS) Normalized Difference Vegetation Index (NDVI) data can feasibly be used to estimate AGB at large scales, and their precise validation is necessary to utilize them effectively. In our study, the clip-harvest method was used at 64 plots in QTP grasslands to obtain actual AGB values, and a handheld hyperspectral spectrometer was used to calculate field-measured NDVI to validate MODIS NDVI...
June 23, 2017: Scientific Reports
keyword
keyword
74390
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"