Chemical composition, minerals concentration, total …
To eliminate this limitation, the present study aimed to cultivating vegetables in controlled conventional and organic systems and determining the chemical composition, phenolic compounds content, minerals concentration, flavonoids profile and antioxidant activity (AA).
ACP
Abstract. The chemical composition and volatility of organic aerosol (OA) particles were investigated during July–August 2017 and February–March 2018 in the city of Stuttgart, one of the most polluted cities in Germany. Total non-refractory particle mass was measured with a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF …
26.1: Organic Compounds and Structures: An Overview
Learning Objectives To recognize the composition and properties typical of organic and inorganic compounds. To identify and name simple (straight-chain) alkanes …
ACP
This similarity in turn suggests that both in the flow reactor and in chambers, SOA chemical composition at low OH exposure is governed primarily by gas-phase OH oxidation of the precursors rather than heterogeneous oxidation of the condensed particles.
Chemistry and geology of coal: nature, composition, …
It contains very little organic matter. Chemical constituents of coal ash may include nitrogen and sulphur compounds, unburned carbon, heavy metals, ... along with petroleum and natural gas, is the most ... Chemical composition is the underlying criterion for the oldest coal-classification system, later improved in the ...
Secondary organic aerosols produced from …
Secondary organic aerosols produced from photochemical oxidation of secondarily evaporated biomass burning organic gases: Chemical composition, toxicity, optical properties, and climate effect
Chemical composition and antifungal activity of plant …
Five plant extracts traditionally used in organic and biodynamic farming for pest control and antifungal (downy mildew) disease management were selected after a farmer survey and analyzed for their chemical composition in LC-PDA-MS-MS and using adapted analytical method from food chemistry for deter …
Organic compound | Definition & Examples | Britannica
An organic compound is any chemical compound in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or …
ACP
This study provides further insight into the chemical composition of the ATAL and assesses its decadal variability composition and aerosol trends for the first time. To assess this, we have carried out long-term modeling of the ATAL using the Community Earth System Model (CESM 1.2), which embeds the Community …
ACP
Isotope studies can constrain budgets of secondary organic aerosol (SOA) that is pivotal to air pollution and climate. SOA from α-pinene ozonolysis was found to be enriched in 13 C relative to the precursor. The observed difference in 13 C between the gas and particle phases may arise from isotope-dependent changes in branching ratios. Alternatively, …
3.1: Understanding Fats and Oils
Fats and oils are organic compounds that, like carbohydrates, are composed of the elements carbon (C), hydrogen (H), and oxygen (O), arranged to form molecules. There are many types of fats and oils …
Natural gas origin, composition, and processing: A review
The natural gas composition is determined mainly by its origin. ... Natural gas can be classified according to its origin and chemical composition (Rojey et al., 1997, Kidnay et al., 2011, ... the presence of microbial methanogenesis in organic-rich gas reservoirs can be detected through an increase in ...
Organic and inorganic composition and microbiology of
Across the state of Pennsylvania, shale gas production is booming; therefore, it is important to assess the variability in PW chemistry and microbiology across this geographical span. We quantified the inorganic and organic chemical composition and microbial communities in PW samples from 13 shale gas wells in north central …
Chemical Composition of the Human Body
Learn what you are made of with this primer on the chemical composition of the average adult human body, in terms of elements and major compounds.
Atmosphere | Free Full-Text | Chemical Composition of Gas …
It has been reported in previous studies that RH will change the chemical composition of gas phase and particle phase oxidation products of different VOCs. The effect of RH on the chemical composition of gas phase products can again be examined by the dot products between experiments carried out at different RH as shown by Figure …
10
Natural gas is a mixture of hydrocarbons with various quantities of non-hydrocarbons, which exists either in the gas phase or in solution with petroleum in …
3.9: Chemistry Matters—Gasoline
Natural gas consists chiefly of methane but also contains ethane, propane, and butane. Petroleum is a complex mixture of hydrocarbons that must be separated into fractions …
Chemical analysis of the Asian Tropopause Aerosol …
45 chemical processing during the transport through convective mixed phase clouds. As a consequence, the chemical composition and abundance of materials which are amenable for the formation of the ATAL are altered and thus differ from the initial
Volatile and semi-volatile organic compounds in landfill gas
Gas emitted from landfills contains a large quantity of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs), some of which are carcinogenic, teratogenic, and mutagenic, thereby posing a serious threat to the health of landfill workers and nearby residents.
Composition of natural gas: understanding its key elements
Unveiling the composition of natural gas: explore its essential components, understand its chemical structure, and gain insights into this versatile energy source.
Biogas Composition – Fact Sheets & Characteristics
Biogas is a renewable energy source that can produce heat and electricity with minimum impact on climate change, being simultaneously a carbon-neutral energy source and a sustainable organic waste management solution. This blog post explains where biogas comes from and how its composition makes it an excellent alternative to …
AMF
High EGR ratio may lead to problems with engine cleanliness, and particulate matter emissions may increase. Oxidation catalyst reduces volatile organic emissions. Particulate filters reduce efficiently particulate matter emissions. Composition of gasoline and diesel . Both gasoline and diesel fuel consist of hundreds of different hydrocarbon ...
Chemical Composition and Optical Properties of Secondary Organic …
The chemical and optical properties of secondary organic aerosols (SOA) have been widely studied through environmental chamber experiments, and some of the results have been parametrized in atmospheric models to help understand their radiative effects and climate influence. While most chamber studies investigate the aerosol …
Global modelling studies of composition and decadal …
This study provides further insight on the chemical composition of the ATAL and assesses its decadal variability composition and aerosol trends for the first time. To asses this, we have
Chemical Composition of Petroleum
Petroleum or crude oil is a complex mixture of hydrocarbons and other chemicals. The composition varies widely depending on where and how the petroleum was formed. In fact, chemical analysis can be used to fingerprint the source of petroleum.
Coal | Properties, Formation, Occurrence and Uses
Chemical composition. Coal is primarily composed of carbon, hydrogen, oxygen, nitrogen, and sulfur. The exact composition of coal varies depending on its age and origin, but generally, coal can be classified into four major types based on its carbon content: lignite, sub-bituminous, bituminous, and anthracite.
Efficient Ethane and Propane Separation from Natural Gas …
The development of efficient technology for natural gas separation in industrial processes has become imperative. In this regard, the exploration of novel and effective adsorbents has gained significant attention. One promising approach is the metal regulation of metal–organic frameworks (MOFs), particularly heterometallic MOFs, …
Natural Gas Composition
Chemical Composition of Natural Gas. The gas we get as consumers, like what shows up at your house, is nearly entirely pure methane. Natural gas is …
Landfill leachate: Sources, nature, organic composition, and …
The landfill leachate can be characterized as a strong wastewater that contains four main pollutants namely: xenobiotic organic compounds, dissolved organic matter, heavy metals, and inorganic macro components [16].The most serious environmental threat of the landfill leachate is contamination of both surface water and …
13.1: Earth's Atmosphere- Divisions and Composition
What are the different layers and components of the earth's atmosphere? How do they affect the climate, weather, and life on our planet? Learn more about the structure and composition of the air we breathe in this introductory chapter of Chemistry for Changing Times.