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Topic Review
SPE/DLLME for Determining Plasticizer Residues
This entry aims to compare two extraction procedures for the analysis of phthalates (PAE) in hot drinks collected from vending machines, usually coffee and tea. The two analytical procedures rely on solid phase extraction (SPE) using C18 cartridge and ultrasound and vortex assisted liquid-liquid dispersive microextraction (DLLME) to mechanically improve dispersion, each followed by a routine analytical method such as GC- FID. Seven phthalates (DMP, DEP, DiBP, DBP, DEHP, DOP, DDP) were analyzed and determined. All analytical parameters (i.e., recovery, limit of detection, limit of quantification, enrichment factors, repeatability, reproducibility) were studied and discussed, as well as the matrix effect. The whole procedure was applied to hot drink matrices, for example coffee, decaffeinated coffee.
  • 599
  • 13 Sep 2021
Topic Review
Spatiotemporal Variation in Gross Primary Productivity
Carbon uptake through the photosynthesis process by a terrestrial ecosystem termed gross primary productivity (GPP) is the way CO2 enters into the biosphere from the atmosphere. GPP not only drives the ecosystem functioning but also takes part in terrestrial carbon sequestration through phenological and physiological processes.
  • 423
  • 10 Mar 2022
Topic Review
Spatial-Temporal Distribution Patterns of Major Mine Debris Flows in China
From 1954 to 2019, the number of major mine debris flow disasters first increased and then decreased. The proportion of mine debris flow disasters to the total number of debris flow disasters also showed a trend of first increasing and then decreasing, with the southwestern region being the area of high occurrence of mine debris flow, and the geoenvironmental areas of middle and low hills and middle and high mountains being the topographic areas of high occurrence of mine debris flow. More than 90% of the major mine debris flow disasters occurred from May to September, with the largest number of disasters occurring in July.
  • 363
  • 27 Apr 2023
Topic Review
Southern European People
Southern European people are a pan-ethnic group, or multi-ethnic regional grouping, and the inhabitants of Southern Europe. South or Southern Europeans can usually trace back full or partial heritage to Greece, Italy, Spain , Portugal, as well as nations bordering with, or ethnoculturally related to, the region. As the pan-ethnic group is also culturally defined, rather than exclusively a geographical category, it often includes peoples inhabiting areas that are, at times, considered outside of the region. This can include people with heritage from Southern France, the Mediterranean islands of Corsica (also part of France ), Malta and Cyprus (geographically part of West Asia), Southeastern Europe's Albania and European Turkey. There are also descriptions of Southern Europeans which include ancestry from other nations in Southeast Europe, and countries of the South Slavs, particularly in diasporic identification. As Slavs, they are also often identified as Eastern Europeans. There is a large Southern European diaspora, with significant concentrations in the United Kingdom, North America (Southern European Americans and Canadians), and Southern European Australians in Oceania. Other subgroups of Europeans include Eastern European people and Northwestern European people.
  • 6.0K
  • 29 Sep 2022
Topic Review
Sources of Microplastic Pollution in Soil
Microplastics (MPs) are the most versatile, inexpensive, and non-biodegradable materials widely used in daily life. Regardless of their enormous applications, MPs have developed into a critical ecological issue. Major sources of MPs in soil ecosystems are sewage sludge, mulching plastic films, inappropriate dumping of plastic waste, agricultural amendments, etc. which pose a severe environmental threat to the different ecosystems of the earth. Soil has become the reservoir of various micropollutants released from several potential sources over decades of applications, harming the soil and the environment.
  • 498
  • 14 Jun 2023
Topic Review
Sources of Microorganisms for Bioaugmentation
Bioremediation encompasses a broad range of environmental biotechnologies, which require multidisciplinary approaches through implementation of innovative tools to the natural biological processes occurring in soil, water, and air. The addition of microbial biomass (bacteria, fungi, and their secreted enzymes) to contaminated areas, i.e., the process of bioaugmentation, can be adapted to the green environment and can notably improve an area’s pollutant removal efficiency (RE), as well as reduce their removal time and costs.
  • 261
  • 21 Mar 2023
Topic Review
Sources of Bioavailable Water in Desert Ecosystems
Water availability is the dominant driver of microbial community structure and function in desert soils. However, these habitats typically only receive very infrequent large-scale water inputs (e.g., from precipitation and/or run-off). In light of studies, the paradigm that desert soil microorganisms are largely dormant under xeric conditions is questionable. Gene expression profiling of microbial communities in desert soils suggests that many microbial taxa retain some metabolic functionality, even under severely xeric conditions.
  • 319
  • 24 Jul 2023
Topic Review
Sources of Arsenic in the Aquatic Environment
Arsenic is an element that is distributed globally and is abundant in the Earth’s crust (20th most abundant element) and seawater (14th most abundant element). It is classified as a metalloid and exhibits both metallic and non-metallic properties. The high solubility and mobility of arsenic in aquatic environments affects its global cycling. Furthermore, the biological processes in the aquatic environment are discussed, especially the possible microbe-mediated reactions of arsenic in sediments. In addition, various environmental factors, such as redox conditions, pH, and salinity, which influence the transformation of arsenic species.
  • 1.1K
  • 04 Jan 2023
Topic Review
Sources of Active Travel Data
Active travel (AT), namely journeys that have been undertaken either entirely or partially using human-powered transportation modes such as walking, cycling, or using a wheelchair, has been the focus of much attention due to its potential for remedying negative impacts of urbanization. Among other benefits, AT helps to meet required physical activity guidelines and reduces traffic congestion and pollution. Furthermore, AT induces the uptake of emerging micromobility, a term that describes the use of electrically assessed lightweight vehicles such as e-bikes, e-scooters, e-skateboards, and hoverboards.
  • 559
  • 12 Jul 2021
Topic Review
Sources and Health Effects of Indoor Air Pollution
Indoor air pollution can be treated with techniques such as chemical purification, ventilation, isolation, and removing pollutions by plants (phytoremediation). Indoor air pollution can be treated with techniques such as chemical purification, ventilation, isolation, and removing pollutions by plants (phytoremediation).
  • 383
  • 08 Aug 2023
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