Acidity function - Factbites

Acidity function - Factbites
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Topic: Acidity function

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	DETERMINATION OF HYDRATION CONSTANT, pKD, FOR A SERIES OF 2-(p-SUBSTITUTED PHENYL)- 4, 4, 5, 5-TETRAMETHYL-..., By: A. POURJAVADI
		Dioxolenium ion, hydration constant, acidity function, indicator ratio
		This has required development of a new acidity function, H
		The relatively modest effect of r-substituents on these properties reflects the strong delocalization of the charge on to the oxygen.
	hafez.shirazu.ac.ir /~journals/a22/222_2.htm (102 words)

	What's Wrong with pH? A Conservator and a Scientist Search for Consensus
		Using the Hammett Acidity Function, an acidity scale can be based on any family of similar molecules that change their absorption characteristics towards any type of electromagnetic radiation upon protonation or deprotonation.
		The crucial properties of this acidity scale are the use of electromotive force of the hydrogen ions in the solution being tested, the use of a comparison (standard) solution, and the need for a quite complicated electrical circuit in the measurement.
		A simple application of an acidity scale based on color changes is pH paper, the name being justified only when the paper is used to measure dilute aqueous solutions, in which case the two acidity scales coincide.
	palimpsest.stanford.edu /waac/wn/wn16/wn16-2/wn16-207.html (3381 words)

	Micro Cluster Water FAQ
		Oxidation, which is a regular function of metabolism and cell funtion, strips an electron from certain molecules.
		The degree of acidity or alkalinity of a solution is measured in terms of a value known as pH, which is the negative logarithm of the concentration of hydrogen ions (Hydrogen atoms that have been stripped of their electron).
		This is an important function because many biochemical reactions normally occurring in living organisms either release or use up ions.
	www.myholistic.com /mall/telstar/articles/waterfaq.php3 (3381 words)

	Modelling Bacterial Growth of Lactobacillus curvatus as a Function of Acidity and Temperature -- Wijtzes et al. 61 (7): 2533 -- Applied and Environmental Microbiology
		Modelling Bacterial Growth of Lactobacillus curvatus as a Function of Acidity and Temperature -- Wijtzes et al.
		Modelling Bacterial Growth of Lactobacillus curvatus as a Function of Acidity and Temperature
		acidity is monitored at several constant temperature values.
	aem.asm.org /cgi/content/abstract/61/7/2533 (400 words)

	Chemical Reactivity
		By converting a hydroxyl function to an ether, its acidity and ease of oxidation (in the case of 1º and 2º-alcohols) can be suppressed to such a degree that normally incompatible reactions, such as those employing Grignard reagents, may be carried out.
		The high acidity of the second hydroxyl function is even more surprising, and undoubtedly reflects the fact that both conjugate bases are stabilized by charge delocalization over a different set of oxygen atoms.
		These reagents are generally preferred over the use of concentrated HX due to the harsh acidity of these hydrohalic acids and the carbocation rearrangements associated with their use.
	www.cem.msu.edu /~reusch/VirtualText/special2.htm (6168 words)

	WOW Curricula Teacher Effect of pH on Aquatic Organisms
		The lower the pH the greater the acidity of the solution..','DEFINITION'); return true;" onMouseOut="nd(); return true;">acid deposition falling within a lake’s watershed is a function of the lake’s proximity to industrial sources of sulphur dioxide and oxides of nitrogen and prevailing weather patterns.
		Conceptually, this means that a decrease in pH represents an increase in acidity, and an increase in pH represents a decrease in acidity.
		Since it is a negative logarithm, an increase in pH is equivalent to a decrease in hydrogen ion activity (approximately equal to concentration in typical lake waters).
	waterontheweb.org /curricula/bs/teacher/ph/teaching.html (3644 words)

	M
		Function: Acidity Regulator, Anticaking Agent, Colour Retention Agent,
		Function: Anticaking Agent, Bulking Agent, Emulsifier, Foaming Agent, Stabilizer, Thickener
		Function: Anticaking Agent, Bulking Agent, Emulsifier, Stabilizer, Sweetener, Thickener
	www.fao.org /docrep/meeting/005/y0474f/y0474f24.htm (3644 words)

	Esophageal Manometry
		Other techniques that are used to study the esophagus include: upper GI x-ray series using swallowed liquid barium; fiberoptic or video endoscopy to visualize the inside lining of the esophagus; and a 24-hour probe left in the end of the esophagus to measure acidity as it refluxes from the stomach.
		Esophageal manometry is a very valuable method of recording and evaluating the muscular function of the esophagus.
		Esophageal manometry is very effective in evaluating the contraction function of the esophagus in many situations.
	www.endowsec.com /pated/epdgs31.htm (3644 words)

	Indigestion, Heartburn, and Low Stomach Acidity - Vitacost
		One of the major functions of stomach acid is to initiate the digestion of large protein molecules.
		If this digestive function is not performed efficiently, incompletely digested protein fragments may be absorbed into the bloodstream.
		Boldo has been used in South America for a variety of digestive conditions, although this may have stemmed from its impact on intestinal infections or liver function.
	www.vitacost.com /science/hn/Concern/Indigestion.htm (3924 words)

	CERC Publications 1983-1987
		Haines, T.A., Jagoe, C.H., Pauwels, S.J., 1985, Fish species distribution as a function of lake acidity in the northeastern United States: Acid Rain and Fisheries: A Debate of Issues.
		Fairchild, J.F., Boyle, T., English, W.R., Rabeni, C., 1987, Effects of sediment and contaminated sediment on structural and functional components of experimental stream ecosystems: Water, Air, and Soil Pollution 36(271-293) (90557)
		Haines, T.A., Pauwels, S.J., Jagoe, C.H., Norton, S.A., 1987, Effects of acidity-related water and sediment chemistry variables on trace metal burdens in brook trout (Salvelinus fontinalis): Annales De La Societe Royale Zoologique De Belgique 117, Supplement 1:45-55 (90537)
	www.cerc.usgs.gov /pubs/center/PUB83-87.htm (3924 words)

	Alphabetical Listing - Digestive Care, 110 capsules/500mg
		This product is an effective antiflatulent that alleviates bloating and relieves upset stomach and occasional heartburn and minor acidity.
		This is a simple natural and safe approach to maintaining healthy digestive functions as it addresses a broad range of gastrointestinal imbalances.
		A Dietary Supplement: Digestive Care is a safe unique, balanced natural formula that helps to alleviate occasional gas, minor heart burn and minor acidity due to excessive/heavy food intake.
	www.naturalcuresproducts.com /catalog/product_info.php?products_id=237 (532 words)

	THE MERCK MANUAL--SECOND HOME EDITION, Acidosis in Ch. 159, Acid-Base Balance
		Acidosis is excessive blood acidity caused by an overabundance of acid in the blood or a loss of bicarbonate from the blood (metabolic acidosis), or by a buildup of carbon dioxide in the blood that results from poor lung function or slow breathing (respiratory alkalosis).
		The treatment of respiratory acidosis aims at improving the function of the lungs.
		When acidosis is severe, bicarbonate may be given intravenously; however, bicarbonate provides only temporary relief and may cause harm—for instance, by overloading the body with sodium and water.
	www.merck.com /mmhe/sec12/ch159/ch159b.html (688 words)

	Potassium - Potassium in Foods, to Treat Rheumatoid Arthritis and Heart Disease
		Potassium is an essential mineral needed to regulate water balance, levels of acidity, blood pressure, and neuromuscular function.
		Potassium is an element (and an electrolyte) that's essential for the body's growth and maintenance.
		Potassium (K+) is the major positive ion within cells and is particularly important for
	linksession.com /q/potassium.htm (228 words)

	Encyclopedia: Leaving group
		In chemistry, the methoxy prefix indicates the function group consisting of the methyl group and oxygen.
		The term hydroxyl group is used when the functional group -OH is counted as a substituent of an organic compound.
		Nitro may refer to: nitro functional group, a functional group with chemical formula NO2 nitroglycerin, an extremely volatile explosive chemical compound nitromagnesium, a fertilizer.
	www.nationmaster.com /encyclopedia/Leaving-group (228 words)

	Problems for Chapter 8
		So the more halogens closer to the OH function, the more acidic the alcohol will be.
		For determination of acidity, remember alkyl groups are donating and halogens are electron-withdrawing.
		The only way you know how to introduce a halogen substituent in an alkane is by free radical halogenation.
	www.chem.arizona.edu /courseweb/974/CHEM241a1/problems_in_chapter_8.html (228 words)

	Neutralise Excess Stomach Acid
		The universal indicator did not function as it should (have a wide range of colours indicating pH levels) therefore it was not chosen, as we wanted to be as accurate as possible.
		Litmus Indicator This was chosen over other indicators to progressively show the acidity of the solution.
		We chose this over other indicators, such as universal indicator, methyl orange and bromothymol blue because we found it easier to tell when a substance was neutral, acid, or alkali.
	www.courseworkbank.co.uk /coursework/neutralise_excess_stomach_acid_949 (3484 words)

	Pathology Update
		They speculated that the hyperplasia may be an adaptive reaction to either the exocrine insufficiency of the inflamed pancreas or the changes in gastric function caused by pancreatitis, or it may develop simultaneously as a result of gastrointestinal hormonal disturbances.
		The retrospective nature of this study, however, does not allow us to study the gastric acidity or possible pathogenetic relationship between the gastric ulcer and Brunner's gland proliferation.
		Brunner's gland hamartoma (BGH), characterized by benign proliferation of the Brunner's glands, was first described by Cruveilhier in 1835.
	www.moffitt.usf.edu /pubs/ccj/v4n4/path.html (3484 words)

	Daily Coral Calcium
		Coral Calcium has over 70 trace minerals that your body needs for proper function including high levels of Calcium.
		Fibromyalgia and over 150 more degenerative diseases have been linked to nutritional deficiency and acidity.
		Top Quality Air Purification Systems - Air Filtration: Air conditioners,purifiers and other air filtration equipment
	www.dailycoralcalcium.com (590 words)

	Blood Energy
		High energy phosphate compounds (glycerophosphates) are vital for proper muscle function and endurance, to ensure that ATP is readily available to fuel muscles over long races, without excess lactic acid accumulation and fatigue.
		The high energy phosphate released by ATP for maximal exertion helps to buffer the rise in muscle and blood acidity, but this phosphate needs to be recycled to produce more available energy immediately.
		Specially designed for performance animals on a high grain diet where B group vitamins may be limiting, and rapid supplementation may be required.
	www.ranvet.com.au /blood.htm (622 words)

	Department of Geological Sciences Colloquium
		The intersection of this function with the range of Lewis basicity of a specific structural unit defines the values of the coefficients m, n, l, a, b, c, d, e, f that are possible for a stable structure.
		The valence-matching principle examines the interaction between these structural components, and a stable structure forms when the Lewis acidity of the interstitial complex closely matches the Lewis basicity of the structural unit.
		The structural unit is usually anionic and is characterized by its Lewis basicity.
	www.umanitoba.ca /faculties/science/geological_sciences/grads/colloquium/huminicki.htm (622 words)

	Ariane-5: Learning from Flight 501 and Preparing for 502
		During the measurements of the natural state of the environment close to the Kourou facilities prior to each test, it was confirmed that, as elsewhere in the Amazonian ecosystem, the aluminium-oxide content in the ground and natural waters (between 4% and 35%), and the water acidity (PH values between 4 and 6), are particularly high.
		The origin of the failure was rapidly narrowed down to the Flight Control System, and more particularly, to the Inertial Reference Systems, which obviously ceased to function almost simultaneously at around H0+36.7 s.
		For Ariane flight 501, more than 100 sensors were installed around the launch pad and as far afield as the towns of Kourou (15 km to the southeast) and Sinnamary (25 km to the northwest).
	esapub.esrin.esa.it /bulletin/bullet89/dalma89.htm (4219 words)

	Untitled Document
		the bulbourethral glands secrete a viscous fluid that appears to line the urethra (but whose function is largely unknown).
		the prostate gland surround the urethra, secretes milky fluid (60% of the volume of semen) that contains enzymes and nutrients and is thought to balance acidity of residual urine in urethra and vagina.
		Male accessory glands include seminal vesicles, the prostate gland and bulbourethral gland.
	www.und.nodak.edu /instruct/agerber/x59lecture.html (590 words)

	Transformer Service Inc.
		The primary function of the oil is to provide a high dielectric insulating material and an efficient coolant.
		In so doing, heat transfer is reduced causing the transformer to operate at higher than normal temperatures, which in turn speeds up the oxidation process (Acidity levels of.20mg KOH/g oil or greater).
		A transformer such as this may be a candidate for "reclassification" to a lower classification once all EPA mandated criteria have been satisfied.
	www.transformer-svc.com /bulletin.php?id=2 (1352 words)

	000007.ubb
		Imines form a equilibrium with amines and ketones, where imine concentration as a function of acidity peaks at a pH around 4.5.
		Yes, imine is formed at the end, but its a small amount, and when doing the acid-base extraction, it gets hydrolysed pretty good.
		The little bit of ketone makes an imine with tryptophan, it decarboxylates, and after a while, the imine hydrolyses, and the ketone moves on to another molecule of tryptophan.
	dmt.lycaeum.org /ncgi/Forum6/000007.ubb (426 words)

	AAOS On-Line Service July 1996 Bulletin Morse taper modular connections
		The biodegradation phenomena observed for Morse taper junctions within TJA was a result of fretting-corrosion that was directly influenced by the component tolerances combined with design and clinical conditions that produced higher magnitude micromotions during function.
		Fretting mediated corrosion and alterations of the local environment (acidity) within these taper interfaces were implicated with suggestions that specific alloy properties (galling) or mixed alloy (galvanic) reactions were critical to the process.
		Morse taper angles used for TJA generally fall in a range of 2 to 12 degrees and when interpenetrating parts of slightly different sizes or angles are assembled as an interference fit, they lock together.
	www.aaos.org /wordhtml/bulletin/july96/biomedic.htm (426 words)

	THE BANKING SYSTEM
		In terms of its functions, the National Bank of Ukraine is the central bank, which pursues comprehensive state policy in the domain of monetary circulation, crediting and provision of the stability of the national monetary unit.
		One essential function of the National Bank is the provision of normal settlements in the national economy.
		As per the Law "On Banks and Banking Acidity., the National Bank is not allowed to fund deficit of the state budget.
	info.ua.net /guide/51.html (426 words)

	Bicarbonate definition - Medical Dictionary definitions of popular medical terms
		Also, the bicarbonate level is an indirect measure of the acidity of the blood that is determined when electrolytes are tested.
		Electrolytes - Electrolytes in the body need to be maintained for bodily fluid function.
		Bicarbonate: In medicine, bicarbonate usually refers to bicarbonate of soda (sodium bicarbonate, baking soda) white powder that is common ingredient in antacids.
	www.medterms.com /script/main/art.asp?articlekey=11038 (236 words)

	Pillin & coll. 2001
		MATRIFE) with poly(vinylidene fluoride) (PVDF) and VDF copolymers was studied by differential scanning calorimetry (DSC) as a function of the fluorinated copolymer crystallinity and fluoroalkyl methacrylic ester content in the methacrylic copolymer.
		Huggins interaction parameters were determined through the melting point depression analysis and compared to correlate the intensity of inter- or intra-molecular interactions between the polymers to the postulated `acidity' of hydrogen atoms in various VDF-containing polymers.
		Miscibility limits were found identical whatever be the blend preparation technique, although solution mixing induced some polymer fractionation, thus giving slightly higher blend glass transition temperature.
	www.univ-ubs.fr /l2p/A2-2002.htm (252 words)

	Alcohol Reactivity
		When the hydroxyl functional group is present together with a function of higher nomenclature priority, it must be cited and located by the prefix hydroxy and an appropriate number.
		Because of its enhanced acidity, the hydrogen atom on the hydroxyl group is rather easily replaced by other substituents.
		In each case the hydroxyl group is converted to an ester of a strong acid.
	www.cem.msu.edu /%7Ereusch/VirtualText/alcohol1.htm (2583 words)

	N101 Potassium
		Potassium is an essential mineral needed to regulate water balance, levels of acidity, blood pressure, and neuromuscular function.
		People with low blood levels of potassium who are undergoing heart surgery are at an increased risk of developing heart arrhythmias and an increased need for cardiopulmonary resuscitation.
		The best way to obtain extra potassium is to eat several pieces of fruit per day, as well as liberal amounts of vegetables.
	www.n101.com /Static/HNs/Supp/Potassium.htm (751 words)

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In the News (Fri 1 Jan 10)