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Ascorbic acid sulfate

L-Ascorbic acid, sulfate monoester, disodium salt. See Disodium ascorbyl sulfate Ascorbo-120, Ascorbo-C Tablets. See L-Ascorbic acid... [Pg.353]

Synonyms L-Ascorbic acid, sulfate monoester, disodium salt... [Pg.1521]

Vitamin C also appears to be involved in the metabolism of cholesterol in another way. Through its sulfated metabolite, ascorbic acid sulfate, it appears to bring about the formation of cholesterol sulfate, a water-soluble compound that is excreted in the urine. By this means, cholesterol may be mobilized from the body tissues, with the result that there is a lowering of blood cholesterol levels. [Pg.1094]

The FCC is to food-additive chemicals what the USP—NF is to dmgs. In fact, many chemicals that are used in dmgs also are food additives (qv) and thus may have monographs in both the USP—NF and in the FCC. Examples of food-additive chemicals are ascorbic acid [50-81-7] (see Vitamins), butylated hydroxytoluene [128-37-0] (BHT) (see Antioxidants), calcium chloride [10043-52-4] (see Calcium compounds), ethyl vanillin [121-32-4] (see Vanillin), ferrous fumarate [7705-12-6] and ferrous sulfate [7720-78-7] (see Iron compounds), niacin [59-67-6] sodium chloride [7647-14-5] sodium hydroxide [1310-73-2] (see lkaliand cm ORiNE products), sodium phosphate dibasic [7558-79-4] (see Phosphoric acids and phosphates), spearmint oil [8008-79-5] (see Oils, essential), tartaric acid [133-37-9] (see Hydroxy dicarboxylic acids), tragacanth [9000-65-1] (see Gums), and vitamin A [11103-57-4]. [Pg.446]

Until recent years the only syntheses of 3-hydroxy quinoline involved multistep processes, the last step of which consisted of the conversion of 3-aminoquinoline to 3-hydroxyquinoline via the diazonium salt. " Small quantities of quinoline have been oxidized to 3-hydroxyquinoline in low yields by using oxygen in the presence of ascorbic acid, ethylenediaminetetraacetic acid, ferrous sulfate, and i)hosi)halc buffer. The decarboxylation of 3-hydroxycinchoninic, acid in boiling nitrobenzene has been re-... [Pg.59]

Besides Fe-, other reducing agents that may be used in conjunction with H2O2 are aliphatic amines, Na2S203 thiourea, ascorbic acid, glyoxal, sulfuric acid, NaHSOs, sodium nitrite, ferric nitrate, peroxidase, AgNOs, tartaric acid, hydroxylamine, ethylene sulfate, sodium phosphite, formic acid, ferrous ammonium sulphate, acetic acid, ferrous sulphate, and HNO2, etc,... [Pg.489]

Patients of varying skin types (1-V) having striae distensae alba on the abdomen or thighs can apply topical 20% glycolic acid daily to the entire treatment area. In addition, these patients apply 10% L-ascorbic acid, 2% zinc sulfate, and 0.5% tyrosine to half of the treatment area and 0.05% tretinoin emollient cream to the other half of the treatment area. The creams are applied on a daily basis for 12 weeks. Improvement is evaluated at 4 and 12 weeks with increased elastin content within the reticular and papillary dermis [14]. [Pg.19]

Synthesis of the 1,2-dihydrodiol of BcP by conventional methods was blocked by the failure of attempts to synthesize its potential synthetic precursors 1-keto-l,2,3,4-tetrahydro-BcP and 1,2-dihydro-BcP (66). However, BcP 1,2-dihydrodiol was obtained in low yield ( 1%) by oxidation of BcP with ascorbic acid-ferrous sulfate (66). [Pg.54]

The 10,11-dihydrodiol of MBA was synthesized from MBA by Method III (12). Hydrogenation of MBA over a platinum catalyst took place regiospecifically in the terminal ring to provide 8,9,10,11-tetra-hydro-MBA (75). Treatment of the latter with DDQ furnished 8,9-dihydro-MBA which underwent conversion to the 10,11-dihydrodiol by the usual procedures. Oxidation of MBA with ascorbic acid-ferrous sulfate to afford low yields ( <0.2%) of the five possible di-hydrodiols has also been described (76). [Pg.56]

Yoshimura et al. [193] carried out microdeterminations of phosphate by gel-phase colorimetry with molybdenum blue. In this method phosphate reacted with molybdate in acidic conditions to produce 12-phosphomolybdate. The blue species of phosphomolybdate were reduced by ascorbic acid in the presence of antimonyl ions and adsorbed on to Sephadex G-25 gel beads. Attenuation at 836 and 416 nm (adsorption maximum and minimum wavelengths) was measured, and the difference was used to determine trace levels of phosphate. The effect of nitrate, sulfate, silicic acid, arsenate, aluminium, titanium, iron, manganese, copper, and humic acid on the determination were examined. [Pg.100]

After the milling process, any gaseous treatments are applied, any powder treatments, e.g. ascorbic acid, are added, as well as any fortifying ingredients such as calcium sulfate. Different countries have various policies on fortifying flour. In the UK, white flour is fortified with calcium to make up for the calcium lost by not making a wholemeal flour. In the USA, bread is fortified with folic acid. It is possible for an untreated flour to be mixed with a flour improver containing the powder treatments. [Pg.60]

Mix 0.01 M dimethyltryptamine, 0.02 M phosphate buffer pH 7.2 containing 5 mM ascorbic acid, 0.02 M disodium EDTA and 0.01 M ferrous sulfate (CuCI may substitute) and add with stirring at 20-22° 0.02 M H202 (0.01 M may increase yield). Let reaction proceed to completion (2 hours or less) and extract with ethyl acetate. Dry and evaporate in vacuum to get about 30% yield of psilocin. The product, which contains the other OH-DMT s as well, can be chromatographed on silica thin layer with t-butanol-acetic acid-water (ACS 22,1210 (1968)) or on a 5% alumina-Nickel... [Pg.73]

This ammonium phosphomolybdate complex is yellow, but if mildly reduced by ascorbic acid in the presence of potassium antimonyl tartrate a solution of stable bluish-purple color ( molybdenum blue ) develops after about ten minutes, which has its strongest absorption at 882 pm (Fig. 4.6). Other mild reducing agents have also been used, including tin(II) chloride, or hydrazine sulfate, which give maximum absorbances at slightly different wavelengths. The intensity of the color which develops is linearly proportional to the... [Pg.86]

The pK values of ascorbic acid are 4.1 and 11.79 [17]. Basically, the imdissociated (H A) and monoanionic (HA ) forms of ascorbic acid predominate in solntions at pH 3. 2 and 5.6, respectively. Copper (II) nitrate was used as the catalyst because of that it forms the least stable complex with nitrate ions among the inorganic anions. Sulfate and chloride ions form more stable complexes with copper, though all of them are relatively weak. [Pg.321]

Protons are mainly derived from two sources—free acids in the diet and sulfur-containing amino acids. Acids taken up with food— e.g., citric acid, ascorbic acid, and phosphoric acid—already release protons in the alkaline pH of the intestinal tract. More important for proton balance, however, are the amino acids methionine and cysteine, which arise from protein degradation in the cells. Their S atoms are oxidized in the liver to form sulfuric acid, which supplies protons by dissociation into sulfate. [Pg.288]

Physically compatible up to 48 hours - Ascorbic acid benztropine cytarabine dexamethasone sodium phosphate diphenhydramine doxorubicin heparin sodium hydrocortisone sodium phosphate lidocaine magnesium sulfate multivitamin infusion (must be refrigerated) vitamin B complex with ascorbic acid. [Pg.1393]

A cell with a small Pt disk working electrode coated with a polyelectrolyte multilayer made of poly(allylamine)-poly(vinyl sulfate), a Pt wire counterelectrode and a reference SCSE may be used for selective amperometric determination of H2O2, in the presence of ascorbic acid (22), uric acid (29) and acetaminophen (148). The latter three compounds show a significant response with the bare working electrode at +0.6 V while a practically nil one with the coated electrode. The reason for this selectivity may be an exclusion effect by the coating. ... [Pg.651]

In the case of giant wheel (molybdenum blue) compounds, the general synthetic strategy involves the acidification (pH 1) and reduction of an aqueous molybdate(VI) solution [possible reducing agents iron powder, tin(II) chloride, molybdenum(V) chloride, ascorbic acid, cysteine, hydroxylamine, hypophos-phorous acid, sodium dithionite, or hydrazine sulfate].On the other hand, an icosahedral ball-shaped cluster can be formed in an aqueous Mo(VI)... [Pg.192]

Bilirubin A false negative may occur when the sample contains ascorbic acid concentrations of 25 mg/dl or more. The yellow/orange-to-red color produced by the presence of indican (indoxyl sulfate) is also problematic. [Pg.33]

The top-down approach involves size reduction by the application of three main types of force — compression, impact and shear. In the case of colloids, the small entities produced are subsequently kinetically stabilized against coalescence with the assistance of ingredients such as emulsifiers and stabilizers (Dickinson, 2003a). In this approach the ultimate particle size is dependent on factors such as the number of passes through the device (microfluidization), the time of emulsification (ultrasonics), the energy dissipation rate (homogenization pressure or shear-rate), the type and pore size of any membranes, the concentrations of emulsifiers and stabilizers, the dispersed phase volume fraction, the charge on the particles, and so on. To date, the top-down approach is the one that has been mainly involved in commercial scale production of nanomaterials. For example, the approach has been used to produce submicron liposomes for the delivery of ferrous sulfate, ascorbic acid, and other poorly absorbed hydrophilic compounds (Vuillemard, 1991 ... [Pg.6]

While esters of sulfuric acid do not play as central a role in metabolism as do phosphate esters, they occur widely. Both oxygen esters (R-0-S03 , often referred to as O-sulfates) and derivatives of sulfamic acid (R-NH-SOg, N-suIfates) are found, the latter occurring in mucopolysaccharides such as heparin. Sulfate esters of mucopolysaccharides and of steroids are ubiquitous and sulfation is the most abundant known modification of tyrosine side chains. Choline sulfate and ascorbic acid 2-sulfate are also found in cells. Sulfate esters of phenols and many other organic sulfates are present in urine. [Pg.659]

The richest dietary sources of total iron are organ meats (liver and kidney), egg yolk, dried legumes, com, molasses and parsley. Liver is particularly valuable because of the high absorbability of its iron. However, only about 10% of dietary iron is absorbed. Iron deficiency anemia can be treated with soluble iron(II) compounds providing 200 mg in three or four daily divided doses. Oral iron(II) sulfate is the least expensive and is in wide use. Ascorbic acid increases the absorption efficiency of iron(II) sulfate. Parenteral administration of iron is used when oral iron is ineffective. Iron-dextran, a colloid formed from iron(III) chloride and an alkali-modified dextran, is one of several preparations available which has found extensive clinical use. It contains up to 28% Fe by weight and has a structural similarity to ferritin. Transfusion therapy may also be used in severe chronic anemia or acute hemorrhage. [Pg.764]


See other pages where Ascorbic acid sulfate is mentioned: [Pg.232]    [Pg.232]    [Pg.476]    [Pg.324]    [Pg.464]    [Pg.17]    [Pg.18]    [Pg.18]    [Pg.22]    [Pg.368]    [Pg.916]    [Pg.421]    [Pg.99]    [Pg.396]    [Pg.39]    [Pg.80]    [Pg.243]    [Pg.58]    [Pg.302]    [Pg.29]    [Pg.35]    [Pg.36]    [Pg.74]    [Pg.700]    [Pg.229]    [Pg.1066]    [Pg.673]   
See also in sourсe #XX -- [ Pg.359 ]

See also in sourсe #XX -- [ Pg.359 ]

See also in sourсe #XX -- [ Pg.359 ]




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