Abstract：
:The Amazonian forest is, due to its great size, carbon storage capacity and present-day variability in carbon uptake and release, an important component of the global carbon cycle. Paleo-environmental reconstruction is difficult for Amazonia due to the scarcity of primary palynological data and the mis-interpretation of some secondary data. Studies of lacustrine sediment records have shown that Amazonia has known periods in which the climate was drier than it is today. However, not all geomorphological features such as dunes, and slope erosion, which are thought to indicate rainforest regression, date from the time of the Late Glacial Maximum (LGM) and these features do not necessarily correspond to episodes of forest regression. There is also uncertainty concerning LGM carbon storage due to rainforest soils and biomass estimates. Soil carbon content may decrease moderately during the LGM, whereas rainforest biomass may change considerably in response to changes in the global environment. Biomass per unit area in Amazonia has probably been reduced by the cumulative effects of low CO2 concentration, a drier climate and lower temperatures. As few paleo-vegetation data are available, there is considerable uncertainty concerning the amount of carbon stored in Amazonia during the LGM, which may have corresponded to 44-94% of the carbon currently stored in biomass and soils.
journal_name
Chemospherejournal_title
Chemosphereauthors
Turcq B,Cordeiro RC,Sifeddine A,Simões Filho FF,Albuquerque AL,Abrão JJdoi
10.1016/s0045-6535(02)00383-1subject
Has Abstractpub_date
2002-12-01 00:00:00pages
821-35issue
8eissn
0045-6535issn
1879-1298pii
S0045-6535(02)00383-1journal_volume
49pub_type
杂志文章相关文献
CHEMOSPHERE文献大全abstract：:Arsenic (As) and zinc (Zn) are common co-contaminants in mining impacted soils. Their interaction on solubility and toxicity when present concurrently is not well understood in natural systems. The aim of this study was to observe their interaction in solubility (soil-solution), bioaccumulation (shoot uptake) and toxi...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2017.08.093
更新日期：2017-11-01 00:00:00
abstract：:In order to obtain basic information for designing standardized test preparation methods, the heavy metals Zn, Cu, Cd and Pb were measured in gastropods (Xerolenta obvia), oligochaetes (Lumbricus terrestris), isopods (Armadillidium vulgare, Trachelipus rathkei) and carabids (Harpalus rubripes, Calathus fuscipes) using...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/S0045-6535(03)00442-9
更新日期：2003-08-01 00:00:00
abstract：:Biochar application to agricultural land has been proposed as a means for improving phosphorus (P) availability in soil. The purpose of the current study was to understand how pyrolysis temperature affects P speciation in biochar and how this affects availability of P in the amended soil. Biochar was produced at diffe...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2016.11.058
更新日期：2017-02-01 00:00:00
abstract：:Contamination of soil with hydrocarbons occurs frequently when petroleum ducts are damaged. Restoration of those contaminated soils might be achieved by applying readily available organic material. An uncontaminated clayey soil sampled in the vicinity of a duct carrying diesel which ruptured recently, was contaminated...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/S0045-6535(03)00653-2
更新日期：2004-01-01 00:00:00
abstract：:The World Health Organization recommends assessing human exposure to contaminants on a regular basis. In order to assess the current dietary exposure of the Belgian adult population to PCDD/Fs and dioxin-like PCBs and to update exposure estimates of 2000-2001, a total diet study was designed. The mean dietary intake o...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2010.01.031
更新日期：2010-04-01 00:00:00
abstract：:Polycyclic aromatic hydrocarbons (PAHs) and its oxygenated derivatives (OPAHs) are toxins in PM2.5. Little information has been known for their transformation in the ambient airs. In this study, PM2.5 samples were collected at 19 sampling sites in Xi'an, China during the heating period, which is classified into: urban...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2016.06.033
更新日期：2016-09-01 00:00:00
abstract：:Mesotrione is a benzoylcyclohexane-1,3-dione herbicide that inhibits 4-hydroxyphenyl pyruvate dioxygenase in target plants. Although it has been used since 2000, only a limited number of degrading microorganisms have been reported. Mesotrione-degrading bacteria were selected among strains isolated from Brazilian aquat...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2011.12.041
更新日期：2012-03-01 00:00:00
abstract：:The study was carried out to evaluate enzyme activities and histopathological changes due to the effect of acute and chronic definitive toxicity of selenium (Se) on the post larvae (PL) of giant tiger shrimp (Penaeus monodon), and green mussel (Perna viridis). The 96-h Median Lethal concentration (LC50) for the PL of ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2018.02.068
更新日期：2018-05-01 00:00:00
abstract：:China's urban and rural populations face very serious health risks from combustion particles. Major sources of exposure to inhalable particulates include the burning solid fuels (biomass and coal) for household cooking and heating, coal-fired industrial and residential boilers, tobacco smoking, and diesel motor vehicl...
journal_title：Chemosphere
pub_type： 杂志文章,评审
doi：10.1016/s0045-6535(02)00246-1
更新日期：2002-12-01 00:00:00
abstract：:Roundup Original® (RD) is a glyphosate-based herbicide used to control weeds in agriculture. Contamination of Amazon waters has increased as a consequence of anthropogenic pressure, including the use of herbicides as RD. The central goal of this study was to evaluate the toxic effects of RD on juveniles of tambaqui (C...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2015.03.042
更新日期：2015-09-01 00:00:00
abstract：:It has not been well understood that the influences of pH and accompanying anions on the toxicity of selenate (Se(VI)). The influences of pH and major anions on Se(VI) toxicity to wheat root elongation were determined and modeled based on the biotic ligand model (BLM) and free ion activity model (FIAM) concepts. Resul...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2020.128424
更新日期：2021-02-01 00:00:00
abstract：:Callitriche cophocarpa (water-starwort)--aquatic widespread macrophyte--was found to be an excellent chromium accumulator. The plants were exposed to various chromium(VI) concentration ranging from 50 to 700 microM in a hydroponic culture up to ca. 3 weeks. Physiological conditions of shoots were monitored via measuri...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2010.03.019
更新日期：2010-05-01 00:00:00
abstract：:Rare earth elements (REEs) are essential in high technology industries and have great economic value. The monitoring of REEs concentrations in rocks from oil well drill cuttings is critical to avoid environmental contamination and evaluate new sources of these elements. However, information is scarce about the REEs co...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2020.127984
更新日期：2021-01-01 00:00:00
abstract：:In this study, a nickel (Ni)-tolerant Bacillus subtilis strain SJ-101 was characterized based on the 16SrDNA homology and phylogenetic analysis. The role of this strain ascertained in facilitating Ni accumulation in the Indian mustard plant (Brassica juncea [L]. Czern and Coss) var. Pusa Bold (DIR-50), to elucidate th...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2005.12.057
更新日期：2006-08-01 00:00:00
abstract：:The aim of the study was to develop quantitative structure-activity relationships (QSARs) for a large group of 77 aromatic aldehydes tested for acute toxicity to the ciliate Tetrahymena pyriformis using mechanistically interpretable descriptors. The resulting QSARs revealed that the 1-octanol/water partition coefficie...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2005.04.040
更新日期：2005-12-01 00:00:00
abstract：:The use of polybrominated diphenyl ethers (PBDEs) as flame retardants in Singapore is not strictly regulated; therefore these compounds can be readily found in furniture, electronic devices, and building materials. This study was the first of its kind to be conducted in Singapore to measure concentrations of PBDEs in ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2006.07.052
更新日期：2007-01-01 00:00:00
abstract：:The use of a very effective insecticide against sucking pests, neonicotinoid imidacloprid, has been increasing extensively. For this reason elevated concentrations are expected in aquatic environment. Despite this fact, there is still a lack of data available on its possible risk for the environment. In this study, th...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2009.05.002
更新日期：2009-08-01 00:00:00
abstract：:In this article, the modeling of inhibitory grown activity against Tetrahymena pyriformis is described. The 0-2D Dragon descriptors based on structural aspects to gain some knowledge of factors influencing aquatic toxicity are mainly used. Besides, it is done by some enlarged data of phenol derivatives described for t...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2016.09.041
更新日期：2016-12-01 00:00:00
abstract：:In recent years the behavior and properties of nanoparticles released to the environment have been studied extensively to better assess the potential consequences of their broad use in commercial products. The fate, transport and mobility of nanoparticles in soil were shown to be strongly dependent on environmental co...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2012.09.018
更新日期：2013-01-01 00:00:00
abstract：:Chemical oxygen demand (COD) is one of the most important water quality parameters that quantifies the amount of oxygen needed to oxidize oxidizable pollutants (mainly organics) in water samples. However, erroneous COD results were commonly observed for bromide-rich industrial wastewater samples using standard COD tes...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2019.124804
更新日期：2020-02-01 00:00:00
abstract：:Biodiesel or renewable diesel fuels are alternative fuels produced from vegetable oil and animal tallow that are being considered to help reduce the use of petroleum-based fuels and emissions of air pollutants including greenhouse gases. Here, we analyzed the gene expression of inflammatory marker responses and the cy...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2018.12.178
更新日期：2019-04-01 00:00:00
abstract：:Target compound analysis with scanning mass spectrometers such as quadrupole or magnetic sector instruments is used extensively in environmental chemistry because of the selectivity, sensitivity, and robustness. Yet, target compound analysis selectively ignores the majority of compounds present in a sample, especially...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2014.02.032
更新日期：2014-12-01 00:00:00
abstract：:Traditionally many structural alloys are protected by primer coatings loaded with corrosion inhibiting additives. Strontium Chromate (or other chromates) have been shown to be extremely effectively inhibitors, and find extensive use in protective primer formulations. Unfortunately, hexavalent chromium which imbues the...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2016.06.044
更新日期：2016-10-01 00:00:00
abstract：:Sequestration of polycyclic aromatic hydrocarbons (PAHs) results in the slow release of PAHs from sediment to the aqueous environment, thus limiting bioavailability. Three methods to account for the limited bioavailability of native PAHs to the gastropod Hinia reticulata were therefore investigated: (i) infinite-sink ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2005.12.028
更新日期：2006-08-01 00:00:00
abstract：:A laboratory-scale acidogenic anaerobic sequencing batch reactor was set up to test the effect of pH change on microbial community structure of the reactor biomass and process performance. No immediate performance change on acidogenesis was observed after the pH change. However, as the hydrogenotrophic methanogen popu...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2014.10.047
更新日期：2015-12-01 00:00:00
abstract：:Cadmium (Cd) is considered as a carcinogenic chemical with potential to endanger normal cellular functioning. The present study was aimed to investigate the impact of Cd on the expression of two oncogenic epigenetic regulators, viz., protein arginine methyltransferase 5 (PRMT5) and the polycomb repressive complex 2 (P...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2019.125186
更新日期：2020-03-01 00:00:00
abstract：:We describe a novel method for efficiently removing glyphosate from aqueous media via adsorption onto highly functionalized star-shaped polymeric particles. These particles have a polystyrene core with more than 35 attached methacrylate polymer arms, each containing a plurality of pendant amines (poly(dimethylamino et...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2016.11.049
更新日期：2017-02-01 00:00:00
abstract：:Fish play an important role as a primary eco-toxicity test organism in environmental hazard assessment. Toxicity data of native species are often sought for use in the derivation of water quality criteria (WQC). The Chinese medaka, Oryzias sinensis, is an endemic species of China. The acute toxicity of 6 chemicals on ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2020.127813
更新日期：2020-12-01 00:00:00
abstract：:Pharmaceuticals and drugs of abuse including novel psychoactive substances (NPS) are emerging as newer contaminants in the aquatic environment. The presence of such pollutants has implications on the environment as well as public health and therefore their identification is important when monitoring water quality. Thi...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2019.02.040
更新日期：2019-05-01 00:00:00
abstract：:Conductive membranes provide a promising method to alleviate membrane fouling, but their cost-effective fabrication, which is urgently needed, is still a challenge. This paper describes the facile fabrication of an ultrafiltration conductive polypyrrole (PPy)-modified membrane (PMM) by in situ chemical polymerization ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2020.129416
更新日期：2020-12-26 00:00:00
