• At high pressure, HeN 4 comprises a polymeric channel-like nitrogen framework filled with linearly arranged helium atoms. (osti.gov)
  • Nitrogen pentafluoride (NF5) is a theoretical compound of nitrogen and fluorine that is hypothesized to exist based on the existence of the pentafluorides of the atoms below nitrogen in the periodic table, such as phosphorus pentafluoride. (wikipedia.org)
  • NF4+F− R3m structure (NF4+)2NF6−F− I4/m structure NF4+NF6− P4/n structure For a NF5 molecule to form, five fluorine atoms have to be arranged around a nitrogen atom. (wikipedia.org)
  • Plants use the energy of sunlight to cleave the relatively stable chemical bonds between the carbon and oxygen atoms in a carbon dioxide molecule. (motherjones.com)
  • In photosynthesis, the CO2 molecule is initially bonded to nitrogen atoms, making reactive compounds called carbamates. (motherjones.com)
  • The graphite-like compound is made from flat layers of carbon and nitrogen atoms arranged in hexagons. (motherjones.com)
  • Hydrazines are chemical compounds that contain two nitrogen atoms joined by a single covalent bond. (cdc.gov)
  • A functional group is a group of atoms in a molecule with distinctive chemical properties , regardless of the other atoms in the molecule. (wikipedia.org)
  • For repeating units of polymers , functional groups attach to their nonpolar core of carbon atoms and thus add chemical character to carbon chains. (wikipedia.org)
  • Imidazole is between the two nitrogen atoms of five membered heterocyclic compounds containing. (lookchem.com)
  • Alkaloids are a group of naturally occurring chemical compounds that contain mostly basic nitrogen atoms. (absoluteastronomy.com)
  • And by spare, I mean that these particular electrons aren't directly forming chemical bonds with other atoms in the compound. (thenakedscientists.com)
  • Compounds with three contiguous nitrogen atoms in linear format, H2N-N=NH, and hydrocarbyl derivatives. (bvsalud.org)
  • Compounds with three contiguous nitrogen atoms in linear format R2N-N=NR. (bvsalud.org)
  • Preparation and properties of a few important compounds of representative elements (like halides, oxides and oxyacids etc. (successcds.net)
  • First row transition metals and general properties of their compounds (oxides, halides and suplhides), Inner transition elements, general feature: Chemistry of iron, copper, silver, gold zinc and mercury (occurrence and extraction without technical details). (successcds.net)
  • At the Earth's surface, the ingredients for making ozone are nitrogen oxides and volatile organic compounds (organic chemicals that vaporize easily). (nasa.gov)
  • These maps show a satellite-based approach to deciding when it would be more effective to reduce nitrogen oxides and when it would be more effective to reduce volatile organic compounds. (nasa.gov)
  • Since there are plenty of naturally produced volatile organics in the air in most places, ozone production is limited by the amount of nitrogen oxides. (nasa.gov)
  • Further reductions of nitrogen oxides, then, would be the best way to limit ozone production in most places. (nasa.gov)
  • other decomposition products include nitrogen oxides and chlorine compounds. (medscape.com)
  • The " Heavy-Duty Low NO x Omnibus Regulation " will require manufacturers to comply with tougher emissions standards, overhaul engine testing procedures, and further extend engine warranties to ensure that emissions of NO x (oxides of nitrogen, a key component of smog) are reduced to help California meet federal air quality standards and public health goals. (greencarcongress.com)
  • U.S. EPA Integrated Science Assessment for Oxides of Nitrogen - Health Criteria (First External Review Draft). (greencarcongress.com)
  • It's created by a chemical reaction between oxides of nitrogen (NOx) and volatile organic compounds (VOCs) in the presence of sunlight. (airquality.org)
  • Based on data from the Ozone Monitoring Instrument (OMI) on NASA's Aura satellite, the maps show the relative amounts of the volatile organic compound formaldehyde and nitrogen dioxide in July and September 2005. (nasa.gov)
  • Across virtually all of the United States, the ratio of formaldehyde to nitrogen dioxide is greater than 1 (yellow, orange, red) throughout the summer months, despite the seasonal decline in naturally produced volatile organics. (nasa.gov)
  • tighter regulation of manmade volatile organic compounds would more effectively stop ozone formation in these urban areas. (nasa.gov)
  • This corrosive three-atom molecule of oxygen forms in the atmosphere through a chemical reaction involving sunlight, nitrogen oxide and volatile organic compounds. (sltrib.com)
  • In the absence of these chemicals, the results of a combined chlorine test indicate the presence of synthetic organic compounds, volatile organic compounds and other higher chlorinated ammonia compounds called N-chloro compounds. (aquaticsintl.com)
  • The role of volatile sulfur compounds (VSCs) in producing bacteria that colonize the dorsal surface of the tongue was recently understood as a primary cause of halitosis (bad breath). (medscape.com)
  • Blood-borne causes often are consequences of metabolic processes that emit odorous volatile sulfur compounds, which are taken by the bloodstream, transported to the lungs, and emitted during exhalation. (medscape.com)
  • He and coworkers established that oral malodor (bad breath) is associated with the presence of volatile sulfur compounds, primarily hydrogen sulfide and methylmercaptan. (medscape.com)
  • Although detector tubes for chlorine reacted with nitrogen-trichloride, the presence of trace amounts of molecular chlorine interfered, making the use of detector tubes unworkable. (cdc.gov)
  • Analytical testing at each step is required to monitor key chemical parameters like nitrogen compounds, phosphates, and chlorine. (sigmaaldrich.com)
  • This compound has a chlorine atom in its structure linked to the quinoxaline ring (C-5) substituted at the C-2 position with a sulfanilamide moiety. (springer.com)
  • The term "combined chlorine" encompasses these three chloramine species plus myriad other chlorinated nitrogen compounds. (aquaticsintl.com)
  • Some of these chemicals or compounds that show up as combined chlorine may include oxidants such as potassium mono-persulfate and ozone. (aquaticsintl.com)
  • Chlorine is a toxic industrial chemical with a history of use as a chemical weapon. (cdc.gov)
  • Ammonia is a compound of nitrogen and hydrogen widely used in fertilizers and pharmaceuticals. (cdc.gov)
  • Most people will smell a noxious odor or feel irritation that indicates exposure to ammonia, but exposure for a long time may affect their ability to sense the chemical. (cdc.gov)
  • If the ammonia release was from household cleaners or chemicals, open windows and doors to the outside to let in fresh air. (cdc.gov)
  • 1993). The total nitrogen content in tobacco leaves-as derived from nitrates, ammonia, amino acids, amides and alkaloids-ultimately contributes to the formation of AAs in tobacco smoke (Stabbert, R., et. (cdc.gov)
  • Nitrate, which is introduced to the growing tobacco plant through the application of fertilizer, can be converted to ammonia, which, in turn, is converted to other nitrogenous organic compounds such as amino acids. (cdc.gov)
  • Intermediate NH2 radicals, forming during the pyrolysis of ammonia during tobacco combustion, may react with aromatic CH groups (from compounds already present in the tobacco leaves) to form the AAs (Patrianakos, C., et. (cdc.gov)
  • Hydrazines are manufactured from chemicals such as ammonia, dimethylamine, hydrogen peroxide, or sodium hypochlorite. (cdc.gov)
  • Amines are a class of organic compounds derived from ammonia (NH3) and have a characteristic fishy odour. (accepta.com)
  • Excess nitrogen (in the form of ammonia) and other byproducts of the urea cycle accumulate in the bloodstream. (medlineplus.gov)
  • The unshared electron pair of 1-bit nitrogen atom in imidazole ring participates in the cyclic conjugation, reduces the electron density of the nitrogen atom, and makes hydrogen of the nitrogen atom easily leave in the form of hydrogen. (lookchem.com)
  • The hydrogen on the 1-bit nitrogen atom can be transferred to the 3-atom, therefore, imidazole derivatives with same substituent respectively on 4-bit and 5-bit are tautomers. (lookchem.com)
  • A Novel Method for Chemical Recycling of Waste Plastics by Utilizing Polyolefin-derived Hydrogen (MURORAN INST. (csj.jp)
  • The unshared electron pair of 3-bit nitrogen atom in imidazole ring doesn't participates in the cyclic conjugation, while it occupies the sp2 hybridized orbital, can accept protons, and form salt with strong acid. (lookchem.com)
  • Amine is the name given to a chemical compound with a nitrogen atom that has a spare pair of electrons. (thenakedscientists.com)
  • In particular, the interaction between the outgoing electron and the remaining system depends on the chemical environment of the atom, which can be studied by quantum chemical methods. (lu.se)
  • Infrared spectrometry allowed the detection of gaseous nitrogen- trichloride (10025851) in atmospheres low in carbon-dioxide. (cdc.gov)
  • Under atmospheric levels of carbon-dioxide, the nitrogen-trichloride absorbance band was completely obscured by carbon-dioxide sidebands. (cdc.gov)
  • These less stable compounds can then be broken down, allowing the carbon to be used in the synthesis of other plant products, such as sugars and proteins. (motherjones.com)
  • We have taken the first step towards using carbon dioxide from the atmosphere as a source for chemical synthesis. (motherjones.com)
  • He conducted the analysis using data from Utah Division of Air Quality monitoring stations that record ambient concentrations of various pollutants, as well as from satellite imagery that shows nitrogen oxide levels and ground-based sensors that record carbon dioxide emissions . (sltrib.com)
  • These are chemical sponges that mop up the excess carbon dioxide in the air allowing astronauts to breath freely. (thenakedscientists.com)
  • The growth curve reflected a diauxic growth other uses for it, in particular lignosulfonates originating from when mixtures of the model compounds were used as carbon the sulfite pulping process, but the predominant technical lig- source. (lu.se)
  • The results show that the shake-up and shake-off processes affect 20% of all emissions from nitrogen, 30% from carbon, 40% from oxygen, and 23% from sulfur. (lu.se)
  • Triple and higher ionizations are rare for carbon, nitrogen, and oxygen, but are frequent for sulfur. (lu.se)
  • Here we suggest a route for synthesis of a tetragonal polymeric nitrogen, denoted t-N, via He-N compounds at high pressures. (osti.gov)
  • As a result, this expands the known polymeric forms of nitrogen and indicates a route to its synthesis. (osti.gov)
  • [1] [2] This enables systematic prediction of chemical reactions and behavior of chemical compounds and the design of chemical synthesis . (wikipedia.org)
  • Imidazoles, Pyrroles, Pyrazoles, Pyrrolidines;Biochemistry;Reagents for Oligosaccharide Synthesis;Highly Purified Reagents;Other Categories;Zone Refined Products;Buffer;ACS Grade Buffers;ACS Grade;Biological Buffers;Buffers A to Z;Building Blocks;C3 to C8;Chemical Synthesis;Essential Chemicals;Heterocyclic Building Blocks;Imidazoles;Inorganic Salts;Research Essentials;Solutions and Reagents;Intermediate for Propafenone hydrochloride. (lookchem.com)
  • As a result, alkaloids find applications in various industries, including medicine, agriculture, and even the synthesis of fine chemicals. (selfgrowth.com)
  • Mass spectrometry with selected ion monitoring detected nitrogen-trichloride. (cdc.gov)
  • Advances in Kinetics and Mechanism of Chemical Reactions describes the chemical physics and/or chemistry of ten novel material or chemical systems. (routledge.com)
  • Hydrazine is used to treat boiler water to reduce corrosion, to reduce other chemicals, and to bring about or speed up chemical reactions. (cdc.gov)
  • In organic chemistry , a functional group is a substituent or moiety in a molecule that causes the molecule's characteristic chemical reactions . (wikipedia.org)
  • The same functional group will undergo the same or similar chemical reactions regardless of the rest of the molecule's composition. (wikipedia.org)
  • Over the past half century, a number of improvements in the way fingerprints are analyzed and identified have been made, many resulting from the use of chemical reactions. (bibalex.org)
  • His research areas include fuel design based on chemical structure, discerning the identity and order of fundamental chemical reactions occurring during hypergolic ignition, and the development of fuel additives. (purdue.edu)
  • Dr Dave Summers investigates a wide range of chemical reactions that are either needed for life to begin, that may affect whether life can exist, or that might be used by scientists to recognize life elsewhere. (seti.org)
  • To date, there has not been a single comprehensive study performed on the multitude of chemical reactions that occur in a pool. (aquaticsintl.com)
  • These reactions process excess nitrogen that is generated when protein is used by the body. (medlineplus.gov)
  • SciFinder-N provides access to the world's most comprehensive and authoritative source of references, substances and reactions in chemistry, chemical engineering, food, biomedicine and related sciences. (lu.se)
  • It contains the PatentPak modul, which can quickly localize chemical information within patents, and chemical reactions are documented in greater details. (lu.se)
  • See also boiling and melting point of different kinds of organic compounds , boiling and melting point of organic nitrogen compounds , pKa of phenols, alcohols and carboxylic acids and pKa of inorganic acids and bases , as well as acid and base pH indicators and Acid-base properties of aqueous solutions of salts with ions from both acids and bases . (engineeringtoolbox.com)
  • Zinc oxide is an inorganic compound that has the chemical formula ZnO is an oxide of Zinc. (mis-asia.com)
  • Insights into how the simultaneous presence of organic and inorganic nitrogen (N) forms influences root absorption will help elucidate the relative importance of these N forms for plant nutrition in the field as well as for nursery cultivation of seedlings. (who.int)
  • The Inorganic Crystal Structure Database (ICSD) is the world's largest database of fully determined inorganic crystal structures, from elements to quintenary compounds. (lu.se)
  • The presence of amines did not seriously affect the mass spectral intensities of nitrogen- trichloride. (cdc.gov)
  • Values for the negative logarithm of the acid dissociation constant, pKa, of the conjugated acid of amines, diamines and cyclic organic nitrogen compounds, shown together with the molecular structure of the acids. (engineeringtoolbox.com)
  • These compounds are highly reactive electrophiles that form stable adducts to a variety of available amino acid residues on proteins upon exposure. (cdc.gov)
  • Compounds that prevent these changes, including coatings on fertilizers and so-called "nitrification inhibitors," can reduce nitrogen losses and increase the amount of nitrogen taken up by plants, leading to lower emissions and less water pollution from fertilizer runoff. (sustainablebrands.com)
  • Also some synthetic compounds of similar structure are attributed to alkaloids. (absoluteastronomy.com)
  • In the realm of organic chemistry, one class of compounds has captured the scientific community's attention for decades - alkaloids. (selfgrowth.com)
  • Alkaloids represent a large and diverse group of organic compounds characterized by the presence of a nitrogen-containing heterocyclic ring. (selfgrowth.com)
  • Alkaloids can be classified into several subclasses based on their chemical structures and origin. (selfgrowth.com)
  • Alkaloids are a fascinating group of naturally occurring chemical compounds found in various plants, fungi, and some animals. (selfgrowth.com)
  • With current technology, we finally are able to peer into plants and see their vast arsenal of chemicals, including glycosides, alkaloids, oxalates, and resins. (medscape.com)
  • In other words, formaldehyde is more abundant than nitrogen dioxide. (nasa.gov)
  • Where urban development is extensive enough, however, the ratio of formaldehyde to nitrogen dioxide shifts to less than 1 (purple, blue, green). (nasa.gov)
  • Levels of nitric oxide, NO, were 57% lower than average for March, and 36% lower for nitrogen dioxide, NO2, which forms in the atmosphere. (sltrib.com)
  • The diagnosis of nitrogen dioxide (NO 2 ) toxicity largely depends on the history of exposure. (medscape.com)
  • Noncardiogenic pulmonary edema following exposure to nitrogen dioxide. (medscape.com)
  • Harmful effects of nitrogen dioxide (NO 2 ) often occur from either high-level short-term or low-level long-term exposures. (medscape.com)
  • Because both kinds of chemicals-plus summertime sunlight and heat-are needed to make ground-level ozone, regulators could control ozone production by reducing only one ingredient. (nasa.gov)
  • Understanding the chemical precursors of ground-level ozone may make it easier to prevent the pollutant from building up in the lower atmosphere. (nasa.gov)
  • As such, occupational exposure to AAs can occur by inhalation or skin contact during the production of chemicals that use AAs as raw materials or intermediates. (cdc.gov)
  • This statement was prepared to give you information about hydrazines and to emphasize the human health effects that may result from exposure to these chemicals. (cdc.gov)
  • no. 106) 1.Phosgene - toxicity 2.Environmental exposure 3.Guidelines I.International Programme on Chemical Safety II.Series ISBN 92 4 15106 0 (NLM Classification: QV 664) ISSN 0259-7268 The World Health Organization welcomes requests for permission to reproduce or translate its publications, in part or in full. (inchem.org)
  • BIBLIOGRAPHY INTRODUCTION The Environmental Health Criteria (EHC) monographs produced by the International Programme on Chemical Safety include an assessment of the effects on the environment and on human health of exposure to a chemical or combination of chemicals, or physical or biological agents. (inchem.org)
  • We present a quantitative exposure assay that simultaneously measures agent specific protein adducts to cysteine for sulfur mustard (HD) and three nitrogen mustards (HN1, HN2, and HN3). (cdc.gov)
  • Compared to previously published assays, this method quantitates both sulfur and nitrogen mustard exposure biomarkers, requires only 10muL of sample volume, and can use either a liquid sample or dried sample spot. (cdc.gov)
  • Pain occurring at or shortly after exposure suggests to first responders that Lewisite or phosgene oxime is the chemical agent involved. (msdmanuals.com)
  • Theoretical models of the nitrogen pentafluoride molecule are either a trigonal bipyramidal covalently bound molecule with symmetry group D3h, or NF+ 4F−, which would be an ionic solid. (wikipedia.org)
  • These ten novel material or chemical systems are examined in the context of various issues, including structure and bonding, reactivity, transport properties, polymer properties, or biological characteristics. (routledge.com)
  • These hydrazines are somewhat similar in chemical structure and reactivity. (cdc.gov)
  • Carbimidates are compounds of great reactivity. (springer.com)
  • The nitrogen framework persists to ambient pressure on decompression after removal of helium, forming pure polymeric nitrogen, t-N. t-N is dynamically and mechanically stable at ambient pressure with an estimated energy density of ~11.31 kJ/g, marking it out as a remarkable high-energy density material. (osti.gov)
  • Over 33 GPa it will form a stable ionic compound with formula (NF+ 4)2NF− 6F- with space group I4/m. (wikipedia.org)
  • A NF5 molecular compound is not stable under any pressure conditions. (wikipedia.org)
  • Nitrogen pentafluoride also violates the octet rule in which compounds with eight outer shell electrons are particularly stable. (wikipedia.org)
  • Nitrogen- trichloride was stable in a glass/polytetrafluoroethylene sample bulb for over 48 hours. (cdc.gov)
  • Bacterial metabolism selected lignin model compounds (vanillin, vanillate, 4- hydroxybenzoate, p-coumarate, benzoate, and ferulate) was carried out with three of the Pseudomonas isolates and in addition with the strain Pseudomonas putida KT2440 from a Introduction culture collection. (lu.se)
  • Here we present calculations on model compounds to represent the most common chemical environments in proteins. (lu.se)
  • The chemistry of s and p block elements with reference to general trends in physical and chemical properties, anomalous behavior of first member of each group, diagonal relationship. (successcds.net)
  • Generation behavior of nitrogen compounds during the thermal degradation of polyimide film in the presence of steam. (csj.jp)
  • Sulfur and nitrogen mustards are internationally banned vesicants listed as Schedule 1 chemical agents in the Chemical Weapons Convention. (cdc.gov)
  • There is insufficient space to do this at typical nitrogen-fluorine covalent-bond lengths, so at least some bonds are forced to be longer. (wikipedia.org)
  • This total nitrogen test kit is faster, safer, more accurate and costs less than the traditional method. (sigmaaldrich.com)
  • The Total Nitrogen Analysis test kit was developed to provide users with a single test method for determining total nitrogen levels in process water and wastewater. (sigmaaldrich.com)
  • companies are already investigating a variety of natural compounds to do so. (sustainablebrands.com)
  • The relationship between imidazole and natural compounds is very close. (lookchem.com)
  • Pure water, often defined as water containing no minerals or chemicals, does not exist naturally in the environment. (lifewater.ca)
  • Safe drinking water, on the other hand, may retain naturally occurring minerals and chemicals such as calcium, potassium, sodium or fluoride which are actually beneficial to human health. (lifewater.ca)
  • These naturally occurring compounds are known for their diverse chemical structures and profound biological activities. (selfgrowth.com)
  • Polymeric nitrogen, stabilized by compressing pure molecular nitrogen, has yet to be recovered to ambient conditions, precluding its application as a high-energy density material. (osti.gov)
  • These methods require microbiological testing by culture or molecular techniques, and chemical testing by spectrophotometry, pH, conductivity, and turbidity analysis. (sigmaaldrich.com)
  • In the context of biology, poisons are substances that can cause disturbances to organisms, usually by chemical reaction or other activity on the molecular scale, when a sufficient quantity is absorbed by an organism. (absoluteastronomy.com)
  • Some of the enzymes which generate aromatic radicals that break down most prominent bacterial strains found were isolated and tax- the complex linkages present in lignin to compounds of lower onomically identified using 16S ribosomal RNA (rRNA) se- molecular weight. (lu.se)
  • The chemical compound elevates the concentration of nitrogen and phosphate, which in turn drives the presence of organisms like algae. (ipsnews.net)
  • This new compound reveals a black or reddish-brown fingerprint in the presence of ultraviolet light. (bibalex.org)
  • However, the perceptions of these odors are so subjective that they are not reliable indicators of the presence or identity of these compounds. (msdmanuals.com)
  • In partnership with JPL, her research focused on solid chemical compounds that are hypergolic with nitrogen tetroxide and its derivatives, for hybrid rocket application. (purdue.edu)
  • Seven compounds inhibited the growth of some cancer cell lines, whereas one of the 2-quinoline derivatives displayed favorable activity against all tested cancer cells with GI 50 values of 0.92-13 μM. (springer.com)
  • These findings prompted us to extend our search for biologically active compounds among nitrogen heterocyclic derivatives. (springer.com)
  • 1.2 Physical and chemical properties Phosgene is a colourless gas at room temperature and standard pressure. (inchem.org)
  • The chemical physics methods used to characterize these ten novel systems are state-of-the-art, and the results should be intriguing to those in the chemistry, physics, and nanoscience fields, include scientists engaged in chemical physics research and the polymer chemistry. (routledge.com)
  • SMILES representations of structure can in turn be used as "words" in the vocabulary of other languages designed for storage of chemical information (information about chemicals) and chemical intelligence (information about chemistry). (daylight.com)
  • This project studies the chemistry of nitrogen compounds on past and present Mars to better understand what nitrogen compounds existed on Mars and how that may have changed over time. (seti.org)
  • The research seeks to understand early solar system organic chemistry and the possible contribution of extraterrestrial organic compounds that may have led to the origin of life. (seti.org)
  • Reaxys enables you to search by structure, substructure, reaction, text, and property data.Being based on the CrossFire Beilstein, CrossFire Gmelin and Patent Chemistry databases Reaxys has a long history beginning with chemical data from 1771. (lu.se)
  • I. J. Solomon believed that nitrogen pentafluoride was produced by the thermal decomposition of NF4AsF6, but experimental results were not reproduced. (wikipedia.org)
  • Catalytic wet peroxide oxidation (CWPO) is emerging as an advanced oxidation process (AOP) of significant promise, which is mainly due to its efficiency for the decomposition of recalcitrant organic compounds in industrial and urban wastewaters and relatively low operating costs. (mdpi.com)
  • The majority of these emissions come from the formation of nitrous oxide, as microorganisms transfer nitrogen from one chemical form to another. (sustainablebrands.com)
  • Another way to chip away at nitrous oxide emissions is to develop crop varieties that absorb more nitrogen and/or inhibit nitrification. (sustainablebrands.com)
  • At a result, levels of nitrogen oxide, a key component of tailpipe emissions, plunged, as did fine particulate pollution, according to the new analysis . (sltrib.com)
  • Combining the names of functional groups with the names of the parent alkanes generates what is termed a systematic nomenclature for naming organic compounds . (wikipedia.org)
  • These results contribute to a better more biomass-derived carbohydrates are also used for produc- understanding of the aromatic metabolism of P. putida in tion of chemicals, a further valorization of lignin is an essential terms of growth and uptake rates, which will be helpful for component. (lu.se)
  • This eclectic survey encompasses a special focus on the associated kinetics, reaction mechanism, or other chemical physics properties of these ten chosen material or chemical systems. (routledge.com)
  • Energy changes during a chemical reaction. (successcds.net)
  • Second law of Thermodynamics : Entropy, free energy, spontaneity of a chemical reaction, free energy and chemical equilibrium, free energy available for useful work. (successcds.net)
  • The CSI team brought out their chemical kits, and mysterious gaseous fumes were released. (bibalex.org)
  • Mutations in the ASS1 gene reduce the activity of the enzyme, which disrupts the urea cycle and prevents the body from processing nitrogen effectively. (medlineplus.gov)
  • This structural feature gives them unique physical and chemical properties, enabling them to exert pharmacological effects on living organisms. (selfgrowth.com)
  • Other activities carried out by the IPCS include the development of know-how for coping with chemical accidents, coordination of laboratory testing and epidemiological studies, and promotion of research on the mechanisms of the biological action of chemicals. (inchem.org)
  • The tertiary treatment utilizes a combination of chemical and biological processes to reduce nutrient loading in the wastewater. (sigmaaldrich.com)
  • The synthesized compounds were evaluated for their biological activity in vitro: tuberculostatic, antibacterial, cytotoxic, and anticancer. (springer.com)
  • The most contemporary chemical physics methods and principles are applied to the characterization of the these ten properties. (routledge.com)
  • The coverage is broad, ranging from the study of biopolymers to the analysis of antioxidant and medicinal chemical activity, on the one hand, to the determination of the chemical kinetics of not chemical systems and the characterization of elastic properties of novel nanometer scale material systems on the other. (routledge.com)
  • Initially, the intern will assist in the characterization of standard (known) organic compounds. (seti.org)
  • Sulfonamides are compounds with diverse pharmacological activity. (springer.com)
  • The amidine functional group is an important structural element of compounds with established pharmacological activity. (springer.com)
  • Calcium nitride is an important chemical reagent and has important uses in the chemical industry. (mis-asia.com)
  • The fourth kind of chemical reagent used to reveal latent fingerprints is ninhydrin. (bibalex.org)
  • The quaternary treatment removes particularly difficult emergent pollutants, like pharmaceutical compounds or other complex molecules. (sigmaaldrich.com)
  • Search 28 million chemical structures and their properties, patents, publications and more. (lu.se)
  • Good quality (potable) drinking water is free from disease-causing organisms, harmful chemical substances and radioactive matter, tastes good, is aesthetically appealing and is free from objectionable colour or odour. (lifewater.ca)
  • Our fully biodegradable odour control chemicals are environmentally friendly and are harmless to humans and animals. (accepta.com)
  • Mercaptans (Thiols): Mercaptans are a class of sulfur-containing organic compounds with a strong, pungent odour. (accepta.com)
  • Chloramine" refers specifically to monochloramine, dichloramine and trichloramine, also called nitrogen trichloride. (aquaticsintl.com)
  • Preparation of few compounds: Potassium dichromate, Potassium permanganate. (successcds.net)
  • China Import: Fertilizer: Mineral or Chemical Fertilizer: Potassium Sulphate data was reported at 2.202 USD mn in Dec 2019. (ceicdata.com)
  • China Import: Fertilizer: Mineral or Chemical Fertilizer: Potassium Sulphate data is updated monthly, averaging 3.195 USD mn from Jan 2001 to Dec 2019, with 228 observations. (ceicdata.com)
  • China Import: Fertilizer: Mineral or Chemical Fertilizer: Potassium Sulphate data remains active status in CEIC and is reported by General Administration of Customs. (ceicdata.com)
  • What was China's China Import: Fertilizer: Mineral or Chemical Fertilizer: Potassium Sulphate in Dec 2019? (ceicdata.com)
  • There are some interesting reagents in acyl imidazole compounds. (lookchem.com)
  • In many crime labs, there are four kinds of chemical reagents used to expose invisible, or latent, fingerprints. (bibalex.org)
  • This was made by treating nitrogen trifluoride and fluorine with 3 MeV electron radiation at 77 K. It decomposed above 143 K back into those ingredients. (wikipedia.org)
  • Tests for nitrate-nitrogen (NO3-N), pH, turbidity, total dissolved solids (TDS), odours, total coliform (the most important test), aerobic and sulphate reducing bacteria can be performed with minimal equipment and cost and provide accurate information on the state of the well water. (lifewater.ca)
  • Theoretical studies also show the ionic compound is very likely to decompose to nitrogen trifluoride and fluorine gas. (wikipedia.org)
  • definition, factors influencing the formation of ionic compounds. (successcds.net)
  • About 20 percent of GHGs from agricultural production are related to nitrogen from fertilizer and manure on crops and pastures. (sustainablebrands.com)
  • Dominik Kurzydłowski and Patryk Zaleski-Ejgierd predict that a mixture of fluorine and nitrogen trifluoride under pressure between 10 and 33 GPa forms NF+ 4F− with space group R3m. (wikipedia.org)
  • UNITED NATIONS ENVIRONMENT PROGRAMME INTERNATIONAL LABOUR ORGANISATION WORLD HEALTH ORGANIZATION INTERNATIONAL PROGRAMME ON CHEMICAL SAFETY ENVIRONMENTAL HEALTH CRITERIA 192 Flame Retardants: A General Introduction This report contains the collective views of an international group of experts and does not necessarily represent the decisions or the stated policy of the United Nations Environment Programme, the International Labour Organisation, or the World Health Organization. (inchem.org)
  • This group also includes some related compounds with neutral and even weakly acidic properties. (absoluteastronomy.com)
  • Resins are a diverse group of chemical compounds that share chemical characteristics, such as insolubility in water, solidity at room temperature, and lack of a nitrogen group. (medscape.com)