157902

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Preparation of a copper-based fluorescent probe for nitric oxide and its use in mammalian cultured cells.

Mi Hee Lim

Nature protocols, 2(2), 408-415 (2007-04-05)

A procedure for the preparation of a copper(II) complex (CuFL) as a fluorescent nitric oxide (NO) detector is described. The fluorescein-based ligand FL can be synthesized in seven reaction steps (overall yield approximately 20%), typically requiring a total time of

1,3-Dibromo-5,5-dimethylhydantoin (DBH) as oxidant and precipitant for drug identification according to PH. EUR Analytical methods of pharmacopoeias with DBH in respect of environmental and economical concern, Part 15(1).

M Hilp

Die Pharmazie, 57(6), 393-395 (2002-07-16)

Elemental bromine serves as oxidant for the identification of propylthiouracil, 2-thiouracil and sulphur according to PH. EUR. 2002. Phenol is identified according to PH. EUR. 2002 with bromine water as the sparingly water-soluble 2,4,4,6-tetrabromo-2,5-cyclohexadiene-1-one. These tests can be performed better

Determination of iodine values using 1,3-dibromo-5,5-dimethylhydantoin (DBH) and ethyl acetate as solvent. Analytical methods with DBH in respect to environmental and economical concern, part 18.

M Hilp

Die Pharmazie, 59(8), 612-614 (2004-09-24)

Iodine values (iodine numbers) of several fixed oils and lard can be determined in ethyl acetate, an easily biodegredable solvent, instead of chloroform according to PH. EUR. 2002. Iodine monobromide has been replaced by 1,3-dibromo-5,5-dimethylhydantoin (DBH) and potassium iodide (KI)

Facile exchange of glycosyl S,S-acetals to their O,O-acetals and preparation of glycofuranosides from acyclic glycosyl S,S-acetals under metal-free reaction conditions in the presence of 1,3-dibromo-5,5-dimethylhydantoin.

Soni Kamlesh Madhusudan et al.

Carbohydrate research, 340(3), 497-502 (2005-02-01)

Exchange of acyclic glycosyl dithioacetals to their O,O-acetals has been achieved by a generalized reaction protocol mediated by 1,3-dibromo-5,5-dimethylhydantoin under mild, metal-free and neutral conditions. This methodology has been extended to the synthesis of alkyl glycofuranosides.

Synthesis, 693-693 (1993)

Application of 1,3-dibromo-5,5-dimethylhydantoin (DBH) instead of bromine gas or bromine water decolorization for drug identification according to PH. EUR. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern, Part 14.

M Hilp

Die Pharmazie, 57(5), 316-319 (2002-06-14)

PH. EUR. 2002 identifies biotin, flucytosine, polysorbate 80 and sorbic acid using the decolorization of bromine water. These tests can be better performed with 1,3-dibromo-5,5-dimethylhydantoin (DBH) in combination of the reaction with fluorescein sodium resp. sodium bromide. Also fluorescein sodium

Cetylpyridinium tetrachlorozincate as standard for tenside titration. Analytical methods with 1,3-dibromo-5,5-dimethylhydantoin (DBH) in respect to environmental and economical concern, part 19.

M Hilp et al.

Die Pharmazie, 59(8), 615-617 (2004-09-24)

The determination of the cationic active disinfectants benzalkonium chloride, benzethonium chloride, cetrimide, and cetylpyridinium chloride according to PH. EUR. 2002 resp. supplement 4.3/2003 can be improved using the DBH-method. By application of column extraction the iodide determination can be performed

Determination of phenol and resorcinol using 1,3-dibromo-5,5-dimethylhydantoin (DBH) analogous to the Koppeschaar reaction. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern, Part 6.

M Hilp

Die Pharmazie, 56(10), 777-779 (2001-10-31)

PH. EUR. 1997 determines phenol and resorcinol according to the Koppeschaar reaction using hepatotoxic and environmentally hazardous chloroform. Chlorinated hydrocarbons are not required when applying 1,3-dibromo-5,5-dimethylhydantoin (DBH). The reaction time for phenol can be reduced from 45 to 5 min.

Determination of selenium sulfide using 1,3-dibromo-5,5-dimethylhydantoin (DBH). Analytical methods of pharmacopeias with DBH in respect to environmental and economical concern Part 11.

Manfred Hilp

Journal of pharmaceutical and biomedical analysis, 28(2), 337-343 (2002-04-04)

USP 2000 (The United States Pharmacopeia, Rockville, MD, 24th ed., 2000, pp. 1514-1515) and PH. EUR. 1997 (European Pharmacopoeia, 3rd ed., Council of Europe, Strasbourg, 1997, p. 1459) dissolve selenium sulfide by boiling with fuming nitric acid for about 1

Determination of iodine values according to Hanus using 1,3-dibromo-5,5-dimethylhydantoin (DBH): analytical methods of pharmacopeias with DBH: part 7.

Manfred Hilp

Journal of pharmaceutical and biomedical analysis, 28(1), 81-86 (2002-02-28)

USP/NF 2000 [The United States Pharmacopeia, Rockville USA, 24th ed., 2000, p. 1868, The National Formulary, 19th ed. 2000] and PH. EUR. 1997 [European Pharmacopoeia, third ed., Council of Europe, Strasbourg, 1997, pp. 63-64] determine the iodine values according to

Titrimetric determination of acetylenic hyponotics using organic brominating agents.

A el-Brashy et al.

Pharmaceutisch weekblad. Scientific edition, 10(2), 90-92 (1988-04-22)

A titrimetric method is described for the determination of three acetylenic hypnotics, namely ethchlorvynol, ethinamate, and methylpentynol carbamate, in bulk and in dosage forms. The method involves the use of either 1,3-dibromo-5,5-dimethylhydantoin (DBH), N-bromosuccinimide (NBS) or N-bromophthalimide (NBP) as titrants.

Colour reactions of PH. EUR. for identification of drugs using 1,3-dibromo-5,5-dimethylhydantoin (DBH) instead of elemental bromine. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern, Part 10.

M Hilp

Die Pharmazie, 57(3), 172-175 (2002-04-06)

PH. EUR. 2002 and supplements identify aloes (Rosenthaler reaction), amiloride hydrochloride, chlorhexidine, dienestrol, quinidine sulphate, quinine hydrochloride and quinine sulphate (Thalleioquine reaction) and trifluoperazine hydrochloride using elemental bromine. This colour reaction can be performed better with 1,3-dibromo-5,5-dimethylhydantoin (DBH). Some prescriptions

Determination of iodide with 1,3-dibromo-5,5-dimethylhydantoin (DBH) in comparison with the ICl-method. Analytical methods of pharmacopeias with DBH in respect to environmental and economical concern. Part 3.

M Hilp et al.

Journal of pharmaceutical and biomedical analysis, 25(3-4), 363-377 (2001-05-30)

USP 1995 (The United States Pharmacopeia, 23rd Edit., (1995), potassium iodide p. 1265, sodium iodide p. 1424), PH. EUR. 1997 (European Pharmacopoeia, third ed., Council of Europe, Strasbourg, (1997), potassium iodide p. 1367, sodium iodide p. 1493) and JAP 1996

Identification of lactate. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern, Part 4.

M Hilp

Die Pharmazie, 56(7), 548-551 (2001-08-08)

The identification of lactate according to Ph. Eur. 1997 and DAB 2000 uses the oxidation of lactic acid to pyruvic acid by boiling with bromine water in sulphuric acid. Acetaldehyde arising by decarboxylation is detected according to Legal applying a

Determination of iron limiting values according to PH. EUR. using 1,3-dibromo-5,5-dimethylhydantoin (DBH) instead of elemental bromine. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern. Part 8.

M Hilp

Die Pharmazie, 57(1), 45-48 (2002-02-12)

PH. EUR. 2002 uses elemental bromine performing iron limit tests for maleic acid (iron 5 ppm) and titanium dioxide (iron 200 ppm). 1,3-Dibromo-5,5-dimethylhydantoin (DBH) can replace bromine water. For the iron limit test of maleic acid bivalent iron is oxidized

Replacement of cyanogen bromide solution PH. EUR. with 1,3-dibromo-5,5-dimethylhydantoin (DBH). Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern, Part 13.

M Hilp

Die Pharmazie, 57(4), 250-251 (2002-05-10)

PH. EUR. 2002 identifies nicotinamid, nicotinic acid, and nikethamide according the reaction of König using cyanogen bromide solution prepared with bromine water and ammonium thiocyanate immediately before use. This colour reaction can be better performed with 1,3-dibromo-5,5-dimethylhydantoin (DBH) and sulphanilic

Organocatalysis as a safe practical method for the stereospecific dibromination of unsaturated compounds.

Gloria Hernández-Torres et al.

Organic letters, 14(7), 1858-1861 (2012-03-27)

Organocatalytic stereospecific dibromination of a wide variety of functionalized alkenes was achieved using a stable, inexpensive halogen source, 1,3-dibromo 5,5-dimethylhydantoin, and a simple thiourea catalyst at room temperature. The presence of a tertiary amine enhanced the rate of the dibromination

Determination of organically bound iodine by reductive mineralization with aluminium powder. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern. Part 16.

M Hilp

Die Pharmazie, 57(7), 471-473 (2002-08-10)

PH. EUR. 2002, JAP 1996 and USP 2000 mineralize organically bound iodine in x-ray contrast media by boiling under reflux with zinc powder in alkaline solution. The reductive mineralization can be performed at room temperature without filtration, when aluminium powder

Determination of propylthiouracil using 1,3-dibromo-5,5-dimethylhydantoin (DBH): analytical methods of pharmacopeias with DBH in respect to environmental and economical concern: part 9.

Manfred Hilp

Journal of pharmaceutical and biomedical analysis, 28(2), 303-309 (2002-04-04)

USP 2000 [The United States Pharmacopeia, Rockville USA, 24th ed., 2000, pp. 1436] and PH. EUR. 1997 [European Pharmacopoeia, third ed., Council of Europe, Strasbourg, 1997, p. 1401] determine propylthiouracil using neutralization titration, whereby 0.1 M silver nitrate and twice

Determination of iodine values using 1,3-dibromo-5,5-dimethylhydantoin (DBH) without the employment of chlorinated hydrocarbons. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern. Part 17.

M Hilp

Die Pharmazie, 57(8), 538-542 (2002-09-14)

Low and medium iodine values of fixed oils and fats can be determined in glacial acetic acid within reduced waiting times of only 5 min. Highly unsaturated compounds such as those of linseed oil, cod-liver oil, sunflower oil, soybean oil

Effectiveness of 1,3-dibromo-5,5 dimethylhydantoin on reduction of Escherichia coli O157:H7- and Salmonella-inoculated fresh meat.

Norasak Kalchayanand et al.

Journal of food protection, 72(1), 151-156 (2009-02-12)

1,3-Dibromo-5,5-dimethylhydantoin (DBDMH; 25 degrees C) and hot water (85 degrees C) spray treatments were evaluated for efficacy in decontamination of pathogenic bacteria attached to beef carcass surfaces represented by cutaneous trunci (CT) muscle sections and beef hearts. Treatments were evaluated

Tetrahedron Letters, 34, 931-931 (1993)

[Isolation of Legionella spp. from cooling tower water and the effect of microbicides].

J Kasai et al.

Rinsho byori. The Japanese journal of clinical pathology, 37(8), 918-922 (1989-08-01)

Legionella spp., the causative organism of legionnaires' disease, were isolated from more than 80% of water samples in cooling towers before washing. Therefore, we evaluated the effect of microbicide treatment of cooling tower water on Legionella spp., other bacteria and

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