Organic compounds organic acids. Medical search. Frequent questions

1.2 This test method may be applicable to the determination of salts and esters of analyte compounds. (astm.org)
For historical reasons, a few classes of carbon-containing compounds (e.g., carbonate salts and cyanide salts ), along with a few other exceptions (e.g., carbon dioxide , and even hydrogen cyanide despite the fact it contains a carbon-hydrogen bond), are generally considered inorganic . (wikipedia.org)
Aluminium salts of palmitic acid and naphthenic acid were combined during World War II to produce napalm. (hmdb.ca)

Identification and evaluation of volatile organic compounds evolved during solarization with almond hull and shell amendments. (cdc.gov)
The purpose of this study was to (1) profile volatiles that may contribute to pest control under field conditions and (2) measure volatile compounds that may present nuisance or exposure risks for humans near biosolarized fields where larger-scale anaerobic degradation of residues occurs. (cdc.gov)
Volatile fatty acids and ketones made up 85% of biosolarized soil headspace, but terpenes, alcohols, aldehydes, esters, and sulfides were detected as well. (cdc.gov)
Exposures to glutaraldehyde (111308), acetic-acid (64197), hydroquinone (123319), ethylene-oxide (75218), formaldehyde (50000), xylene (1330207), and volatile organic compounds were all well below any evaluation criteria. (cdc.gov)
4 The fires at the site created toxic combustion products, such as polycyclic aromatic hydrocarbons (PAHs), dioxins, volatile organic compounds, and various other known carcinogenic compounds. (cdc.gov)
Organic acids and volatile compounds were also determined. (bvsalud.org)

One of the most ancient of Falkowski's biological machines is the ribosome, a combination of proteins and nucleic acids that causes protein synthesis. (nybooks.com)
In soft tissues, phosphate is mainly found in the intracellular compartment as an integral component of several organic compounds, including nucleic acids and cell membrane phospholipids. (msdmanuals.com)

At a low concentration, TFA is used as an ion pairing agent in liquid chromatography (HPLC) of organic compounds, particularly peptides and small proteins. (wikipedia.org)
Similar compounds on Earth take part in the chemical reactions that form amino acids, which are the organic compounds that combine to form proteins and are essential to life as we know it. (space.com)
However, one thing that is certain, is that life would have required amino acids at some point in order to synthesise proteins, which are responsible for a number of biological functions, such as catalysing metabolic reactions, the replication of DNA, transportation of molecules and giving structure to cells and organisms 3 . (nature.com)
Both inorganic and organic acids denature the proteins of the skin, resulting in a coagulum, the color of which depends on the acid involved. (medscape.com)

Most synthetically-produced organic compounds are ultimately derived from petrochemicals consisting mainly of hydrocarbons , which are themselves formed from the high pressure and temperature degradation of organic matter underground over geological timescales. (wikipedia.org)

TFA is widely used in organic chemistry for various purposes. (wikipedia.org)
One complication to its use is that TFA forms an azeotrope with water (b. p. 105 °C). TFA is popularly used as a strong acid to remove protecting groups such as Fmoc and BOC used in organic chemistry and peptide synthesis. (wikipedia.org)
In chemistry , many authors consider an organic compound to be any chemical compound that contains carbon-hydrogen or carbon-carbon bonds , however, some authors consider an organic compound to be any chemical compound that contains carbon. (wikipedia.org)
The study of the properties, reactions, and syntheses of organic compounds comprise the discipline known as organic chemistry . (wikipedia.org)
Acid-based chemistry. (testprepreview.com)
An introduction to the concepts of chemistry underlying important processes in biology and human health, including chemical bonding, energetics, kinetics, equilibria and solubility, properties of water and solutions, acids, bases, complexation and electron transfer, mechanisms of organic reactions and properties of amino acids and carbohydrates. (otago.ac.nz)
Both inorganic and organic compounds can be analyzed and characterized by experienced personnel in consultation with the highly recognized faculty members in the chemistry department at ETSU. (etsu.edu)
The findings highlight the importance of aqueous chemistry for defining the ultimate concentrations of amino acids in primitive extraterrestrial samples. (nature.com)
To help you understand organic chemistry better, I have put together some molecular models for you to play with. (creative-chemistry.org.uk)
Creative Chemistry has molecular models of simple carboxylic acids with 1 to 4 carbon atoms. (creative-chemistry.org.uk)
This subject is designed to provide a basic understanding of some of the important elementary ideas and principles across the fields of general, inorganic and organic chemistry. (edu.au)

Berzelius also contended that compounds could be distinguished by whether they required any organisms in their synthesis (organic compounds) or whether they did not ( inorganic compounds ). (wikipedia.org)
[6] Vitalism taught that formation of these "organic" compounds were fundamentally different from the "inorganic" compounds that could be obtained from the elements by chemical manipulations in laboratories. (wikipedia.org)

The biostimulants are based on organic nitrogen compounds such as amino acids. (lu.se)

Living things incorporate inorganic carbon compounds into organic compounds through a network of processes ( the carbon cycle ) that begins with the conversion of carbon dioxide and a hydrogen source like water into simple sugars and other organic molecules by autotrophic organisms using light ( photosynthesis ) or other sources of energy. (wikipedia.org)
The following work describes the synthesis of compounds carrying a vicinal difluoro motif and the evaluation of this structural element to influence the conformation of organic molecules. (st-andrews.ac.uk)
Molweight, melting and boiling point, density, pKa-values, as well as number of carbon and hydrogen atoms in molecules are given for 150 different alcohols and acids. (engineeringtoolbox.com)
In studying these ejections, the team found organic molecules that are condensed onto these grains and which contain oxygen and nitrogen. (space.com)
We don't yet know if amino acids are needed for life beyond Earth, but finding the molecules that form amino acids is an important piece of the puzzle," Nozair Khawaja, who led the research team from the Free University of Berlin, said in a statement . (space.com)
Carboxylic acid molecules contain a carboxyl group, −COOH. (creative-chemistry.org.uk)
This project focuses on investigating the asteroidal contribution of organic molecules to the terrestrial planets in the early Solar System - molecules that may have contributed to the rise of life on Earth and potentially on Mars. (nasa.gov)
Fragments from asteroids arrive at the Earth (and Mars) at comparably low velocities and can efficiently deliver intact organic molecules to the surfaces of these planets. (nasa.gov)
In the case of cometary nuclei, it is expected that most of the contained organic compounds will be essentially pristine nebular and/or pre-nebular molecules. (nasa.gov)
During this process, pre-existing nebular organic molecules apparently underwent alteration and/or abiotic carbon species were processed to produce relatively high concentrations of prebiotic molecules in the more altered meteorites. (nasa.gov)
However, most of the compounds which have been identified with certainty in space are relatively small molecules such as hydrogen, water and carbon dioxide. (lu.se)
Finding traces of organic compounds indicates the possibility that carbon atoms could combine to form complex molecules even out in space. (lu.se)

some properties of alcohols, esters and carboxylic acids. (edu.au)
Conventional wines showed a lower content of esters, and a higher concentration of alcohols than organic and biodynamic ones. (bvsalud.org)
1996). In- haled vapors that are highly water soluble (e.g., some organic esters and especially the organic acids) are characterized by high degree of extraction in the nasal cavity and show little systemic accumulation. (cdc.gov)

an organic compound that contains a carboxyl group (C(=O)OH). (engineeringtoolbox.com)
Ptomaines are bases and are formed by removing the carboxyl group (COOH) from amino acids. (dictionary.com)

The general formula of a carboxylic acid is R-COOH, with R referring to the rest of the molecule. (engineeringtoolbox.com)
A carboxylic acid where the R is an alkane. (engineeringtoolbox.com)

Palmitic acid, or hexadecanoic acid, is one of the most common saturated fatty acids found in animals, plants, and microorganisms. (hmdb.ca)
Palmitic acid is the first fatty acid produced during fatty acid synthesis and is the precursor to longer fatty acids. (hmdb.ca)
A mixture of naturally-occurring tocopherols have been added to bosch dog food to help conserve the delicate yet essential vitamins and fatty acids. (zooplus.co.uk)
This group of compounds includes amino acids and fatty acids. (bvsalud.org)

It is a structural analogue of acetic acid with all three of the acetyl group's hydrogen atoms replaced by fluorine atoms and is a colorless liquid with a vinegar-like odor. (wikipedia.org)
TFA is a stronger acid than acetic acid, having an acid ionisation constant, Ka, that is approximately 34,000 times higher, as the highly electronegative fluorine atoms and consequent electron-withdrawing nature of the trifluoromethyl group weakens the oxygen-hydrogen bond (allowing for greater acidity) and stabilises the anionic conjugate base. (wikipedia.org)
TFA is prepared industrially by the electrofluorination of acetyl chloride or acetic anhydride, followed by hydrolysis of the resulting trifluoroacetyl fluoride: CH 3COCl + 4 HF → CF 3COF + 3 H 2 + HCl CF 3COF + H 2O → CF 3COOH + HF Where desired, this compound may be dried by addition of trifluoroacetic anhydride. (wikipedia.org)
Identified volatiles with low US recommended exposure limits were quantified via internal and external standards, including acetic acid, 2-butanone, butanal, hexanal, and phenylethyl alcohol. (cdc.gov)
The main purpose of AChE is to hydrolyze acetylcholine (ACh) to choline and acetic acid. (medscape.com)
Bacteria isolates belonged to lactic acid bacteria (Lactiplantibacillus plantarum and Pediococcus pentosaceus) and acetic acid bacteria (Gluconobacter oxydans). (bvsalud.org)

Similar chemicals may also be determined by this test method, but it is the user's responsibility to verify the applicability of this test method to any compounds not listed in this scope. (astm.org)

Tables and figures below show the liquid density at 20°C for different groups of organic sulfur compounds , compared to other kinds of organic classes as alkanes, alcohols, acids and amines . (engineeringtoolbox.com)
See also density for n-alkanes, alcohols and acids and density, boiling and melting points of nitrogen and sulfur compounds. (engineeringtoolbox.com)
The alcohols are a homologous series of organic compounds. (creative-chemistry.org.uk)

Oxidative degradation of the phenyl rings allowed to access erythro and threo 2,3- difluorosuccinic acids and a variety of derivatives thereof. (st-andrews.ac.uk)
Conformational analysis of derivatives of 2,3-difluorosuccinic acid was carried out using JHFandJHHNMR coupling constants. (st-andrews.ac.uk)
For this reason, we prepared eight derivatives of lignite humic acids using either water-soluble N-Ethyl-N′-(3-dimethylaminopropyl)carbodiimide (EDC) or water-insoluble N,N′-dicyclohexylcarbodiimide (DCC) under various conditions. (researchgate.net)

An α-amino acid that consists of propionic acid bearing an amino substituent at position 2. (ebi.ac.uk)
On Earth, energy, or heat, from hydrothermal vents on the ocean floor helps to fuel these amino acid-producing reactions. (space.com)
Some dipeptides are known to have physiological or cell-signalling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis. (hmdb.ca)
The concentrations show that N,N-dimethylglycine (DMG) is the most abundant amino acid in the TD1 particle, but below detection limit in the other. (nature.com)

In such a scenario, the progenitor planetesimal of Ryugu would be expected to accrete large quantities of icy volatiles and thus ISM/outer PSN organic matter, such as amino acids. (nature.com)

An organosulfur compound that contains a carbon-bonded sulfhydryl group (-SH), with the general formula R-SH (where R represents an alkyl or other organic substituent). (engineeringtoolbox.com)

Presses used exclusively for extruding metals, minerals, plastics, rubber, or wood are exempt except where halogenated carbon compounds or hydrocarbon solvents are used as foaming agents. (texas.gov)

It can be a primary (R-NH2), a secondary (R',R''-NH) or a tertiary amine (R',R'',R'''-N), where R represent an alkyl or other organic substituent. (engineeringtoolbox.com)

TFA is also less oxidizing than sulfuric acid but more readily available in anhydrous form than many other acids. (wikipedia.org)
For example, numerous cases of serious permanent injury and, occasionally, death caused by exposure to sulfuric acid drain cleaners have been recorded by the CPSC. (medscape.com)
Nitric acid burns result in a yellow eschar, whereas sulfuric acid eschar is black or brown. (medscape.com)

There are [compounds containing the element sulphur] in this meteorite that aren't found on Earth and there are also some very unusual shapes of sulphide. (bbc.co.uk)

Wooden shafts or calcium alginate swabs may contain substances that inhibit some viruses and nucleic acid detection reactions. (medscape.com)

However, the health assessor will find the information in this report useful in characterizing the significance of exposure pathways and the importance of the physical and chemical properties of the lead compounds that may impact on persons' uptake of lead. (cdc.gov)
Inorganic and organic lead compounds / IARC Working Group on the Evaluation of Carcinogenic Risks to Humans. (who.int)
This monograph re-evaluates the potential carcinogenic hazards to humans from exposure to inorganic and organic lead compounds. (who.int)

Trifluoroacetic acid is a corrosive acid but it does not pose the hazards associated with hydrofluoric acid because the carbon-fluorine bond is not labile. (wikipedia.org)
Only if heated or treated with ultrasonic waves will it decompose into hydrofluoric acid. (wikipedia.org)
Chemical injuries are commonly encountered following exposure to acids and alkali, including hydrofluoric acid (HF), formic acid, anhydrous ammonia, cement, and phenol. (medscape.com)

Arabinonic acid, glyceric acid, glycolic acid and formic acid can be determined in organic compounds using ion-exclusion chromatography with subsequent conductivity detection in accordance with inverse suppression. (metrohm.com)

WHO advocates banning or strong restrictions on the use of class I pesticides and a reduction in the use of pesticides to a minimal number of compounds that are less hazardous than others. (medscape.com)

Improved histopathological evaluation techniques in the upper and lower respiratory-tract tissues following inhalation toxicity studies have shown that a wide variety of compounds cause selective damage to epithe- lial tissues in these airways. (cdc.gov)
These compounds predominantly cause contact-site toxicity and show an anterior-to-posterior gradation in lesion intensity and severity along the respiratory tract (Bog- danffy et al. (cdc.gov)
Such compounds have a potential to accumulate in the blood and can cause toxicity both at the portal of entry and in remote sites such as the liver and kidney (Cruzan et al. (cdc.gov)
Subchronic and chronic inhalation studies have shown that these in- haled compounds elicit similar dose-response for toxicity in systemic organs such as the liver and kidney. (cdc.gov)

Due to carbon's ability to catenate (form chains with other carbon atoms ), millions of organic compounds are known. (wikipedia.org)
To complete the task, we need to determine the molecular formula of the unknown organic compound that contains C, H, O, and N atoms. (quizlet.com)

Phenoxy acid herbicides can be toxic even at low concentrations. (astm.org)
Across biosolarization treatments, headspace concentrations of selected compounds did not exceed 1 mg/m3. (cdc.gov)
Here, the concentrations of amino acids from two particles from different touchdown sites (TD1 and TD2) are reported. (nature.com)

Polar and apolar moieties of humic acids are spatially separated forming domains of different polarity. (researchgate.net)
In this work, we tested the procedures to crosslink functional groups in polar domains of humic acids by using carbodiimide coupling and analyzed to which extent influenced the modification their hydration properties and stability. (researchgate.net)
Higher moisture uptake and water holding capacity were observed in humic acids, which were pre-wetted prior to crosslinking for at least 24 h. (researchgate.net)
The results suggested that water holding capacity, swelling kinetics and moisture uptake of humic acids were not influenced significantly by the amount of polar groups, but also by their spatial arrangement and distribution. (researchgate.net)
It reflects the relative molecular mass or aromatic condensation degree of humic acid. (researchgate.net)
The E4/E6 data of humic acid/fulvic acid extracted by mechanochemical activation of peat are shown in Table 3. (researchgate.net)
The mechanochemical methods can increase the molecular condensation degree and molecular relative mass of humic acid, but reduce the molecular condensation degree and molecular relative mass of fulvic acid. (researchgate.net)
It is activated by mechanochemical method, and then humic acid and fulvic acid are extracted by alkali-soluble acid purification technology. (researchgate.net)
The results show that mechanochemical the method can improve the extraction rate of humic acid and fulvic acid in peat. (researchgate.net)
This method was previously developed for the characterization of water in polysaccharides 41−43 and also tested for humic acids. (researchgate.net)

This study demonstrates that almond processing residues recycled into the soil as biosolarization substrates produce a high diversity of bioactive degradation compounds on a field scale, with low potential of non-target risks to humans.Implications: This manuscript has implications for two policy goals in the state of California: to reduce landfill disposal of organic waste, and to reduce emissions from soil fumigants. (cdc.gov)

5.1 Chlorinated phenoxyacid herbicides, and other organic acids are used extensively for weed control. (astm.org)
1.1 This test method covers a gas chromatographic procedure for the quantitative determination of selected chlorinated acids and other acidic herbicides in water. (astm.org)

It is generally used commercially as either the solid or as a 50% aqueous solution and should be stored in a cool, dry, well ventilated location separate from organic and oxidizing materials, acids, and metal powders. (cdc.gov)
Furthermore, the relationships between the amino acids and the geochemistry suggest that DMG formed on the Ryugu progenitor body during aqueous alteration. (nature.com)
More complex meteoritic amino acids are thought to require aqueous processing and are thus thought to form on planetesimals while they are hot enough to sustain liquid water 14 . (nature.com)
In the case of asteroids - as indicated by organic-bearing CI1 and CM2 meteorites - the organic compounds will commonly have been either modified or synthesized altogether as a result of aqueous processes within mildly heated parent bodies. (nasa.gov)

A molecular entity capable of accepting a hydron from a donor (Br o nsted acid). (ebi.ac.uk)
N . Calculate the molecular formula of the compound. (quizlet.com)

It is a reagent used in organic synthesis because of a combination of convenient properties: volatility, solubility in organic solvents, and its strength as an acid. (wikipedia.org)
Encyclopedia of Reagents for Organic Synthesis. (wikipedia.org)

This research focuses on: (A) identifying the pathways by which extraterrestrial prebiotic organic compounds reached the early Earth and Mars, and (B) estimating the flux of such material as a function of time. (nasa.gov)

All life on Earth contains amino acids and carbonaceous chondrite meteorites have been suggested as their source at the origin of life on Earth. (nature.com)
Some types of meteorites contain significant amounts of organic compounds, including amino acids. (nasa.gov)

Occupations in which the highest potential exposure to lead exists include mining, primary and secondary smelting, production of lead-acid batteries, pigment production, construction and demolition. (who.int)

However, the researchers have seen traces of several organic (carbon-based) or even biochemically significant compounds in space. (lu.se)

Organic compounds containing the carboxy group (-COOH). (bvsalud.org)

Trifluoroacetic acid (TFA) is an organofluorine compound with the chemical formula CF3CO2H. (wikipedia.org)
Different forms ( allotropes ) of pure carbon, such as diamond , graphite , fullerenes , and carbon nanotubes [4] are also excluded because they are simple substances composed of only a single element and therefore are not generally considered to be chemical compounds . (wikipedia.org)
Vitalism was a widespread conception that substances found in organic nature are formed from the chemical elements by the action of a "vital force" or "life-force" ( vis vitalis ) that only living organisms possess. (wikipedia.org)
With the growing consumer demand for natural preservatives to replace chemical compounds, plant antimicrobial compounds must be thoroughly investigated for their potential to serve as biopreservatives. (hindawi.com)
Increasing regulatory restrictions and consumer negative response to chemical compounds and to the use of antibiotics in agriculture have contributed to the pressure for the development of alternative compounds for use as antimicrobial agents [ 6 ]. (hindawi.com)
The analytical instruments in the department enable us to analyze a wide range of chemical compounds in different matrices such as water, gasoline, agricultural crops, etc. (etsu.edu)
Basic winemaking parameters, some key chemical analysis and aroma compounds were considered. (bvsalud.org)

TFA is the precursor to many other fluorinated compounds such as trifluoroacetic anhydride, trifluoroperacetic acid, and 2,2,2-trifluoroethanol. (wikipedia.org)

Carboxylic acids can be saturated, unsaturated, or aromatic. (bvsalud.org)

Any of various toxic nitrogenous organic compounds produced by bacterial decomposition of protein, especially in dead animal tissue. (dictionary.com)

An organic compound consisting entirely of hydrogen and carbon. (engineeringtoolbox.com)

Polymers were used only by organic and biodynamic microbial communities, which also showed the highest values of Shannon's diversity index, and substrate richness. (bvsalud.org)

Gout occurs when there is too much uric acid in the blood. (lu.se)
The body produces uric acid when it breaks down purine, an organic compound found in food. (lu.se)
Normally, uric acid is excreted by our kidneys , but if the body produces too much uric acid or if our kidneys are unable to excrete enough uric acid, small crystals start to form in our joints , creating inflammation. (lu.se)

It's higher in extra-terrestrial organic material than any other meteorite. (bbc.co.uk)
While many meteoritic amino acids are considered indigenous, deciphering the extent of terrestrial contamination remains an issue. (nature.com)
The CI1 (e.g., the meteorite Orgueil ) and CM2 (e.g., the meteorite Murchison ) assemblages contain significant amounts of extra-terrestrial organic matter, as well as elemental carbon and water-bearing minerals. (nasa.gov)
ALS also offers a range of tests for biota, and depending on the compound can test terrestrial and aquatic plants and animals, animal tissue, eggs, blood and serum, as well as human blood, human serum and human milk. (alsglobal.com)

CH 4 ) is among the simplest organic compounds. (wikipedia.org)

8 These reasons make apparent the need for a standard test method for such compounds in water. (astm.org)
When dissolved in water or neutralized with acid, it liberates substantial heat, which may be sufficient to ignite combustible materials. (cdc.gov)
Palmitic acid is also used in the determination of water hardness and is a surfactant of Levovist, an intravenous ultrasonic contrast agent. (hmdb.ca)
In a 13-week gavage study, B6C3F1 mice (20 per sex per dose) received MCA (as an acid in deionized water) at doses of 0, 25, 50, 100, 150 or 200 mg/ kg bw per day, 5 days per week. (canada.ca)
In the same study as above, six groups of F344 rats (20 per sex per dose) received MCA (as an acid in deionized water) by gavage at 0, 30, 60, 90, 120 or 150 mg/ kg bw per day, 5 days per week, for 13 weeks. (canada.ca)
These compounds are presumed to have formed by non-biological processes, either in the solar nebula (with subsequent incorporation into asteroids during their formation), or within the asteroids themselves by liquid water acting on the original minerals. (nasa.gov)
The critical conditions for forming these organic- and water-bearing assemblages is that during planetesimal accretion, their parent bodies incorporated a component of water ice and that their parent bodies underwent moderate heating sufficient to melt that ice without attaining high temperatures which would have dehydrated object. (nasa.gov)

Anatomy7

Organisms21

Diseases3

Chemicals and Drugs135

Analytical, Diagnostic and Therapeutic Techniques and Equipment20

Psychiatry and Psychology2

Phenomena and Processes44

Disciplines and Occupations5

Technology, Industry, Agriculture12

Information Science2

Health Care26

Salts3

Volatile6

Nucleic acids2

Proteins4

Hydrocarbons1

Chemistry11

Inorganic compounds2

Nitrogen compounds1

Molecules12

Esters3

Carboxyl group2

Carboxylic acid2

Fatty acids4

Acetic6

Chemicals1

Alcohols3

Derivatives3

Amino acid4

Volatiles1

Organosulfur1

Hydrocarbon1

Amine1

Sulfuric acid3

Sulphur1

Reactions1

Lead compounds3

Hydrofluoric acid3

Formic acid1

PESTICIDES1

Toxicity4

Atoms2

Concentrations3

Humic10

Degradation1

Herbicides2

Aqueous4

Molecular2

Synthesis2

Extraterrestrial1

Meteorites2

Exposure1

Several organic1

COOH1

Chemical7

Precursor1

Aromatic1

Nitrogenous1

Hydrogen1

Polymers1

Uric3

Terrestrial4

Simplest1

Water7