摘要:
Methods and compound useful for detecting a source of hydrogen peroxide are disclosed wherein a signalling compound of formula
is reacted with peroxide. A detectable product compound of the formula Sig - OH or Sig-O is produced and detected by measuring color, absorbance, fluorescence, chemiluminescence or bioluminescence. The signalling compound itself does not possess the detectable property or does so only to a very weak degree. The methods can be used as a detectable signal in assays for peroxide or peroxide-producing enzymes and in assays employing enzyme-labeled specific binding pairs. The signaling compound has the formula:
wherein B is a boron atom, R 5 and R 6 are independently selected from hydrogen and lower alkyl groups and can be joined together as a straight or branched alkylene chain forming a five or six-membered ring or an arylene ring, and R 13 is independently selected from cyano, imine, carbonyl, thiazole, carbonyl-substitute thiazole and benzothiazole groups or a group
wherein Z is C-C double or triple bond or aromatic ring and n is 1 or 2.
摘要:
A chemiluminescence method characterized in that a 1,2-dioxetane derivative of the formula 1:
wherein each of R 1 , R 2 , R 3 , R 4 and R 5 which are independent of one another, is a hydrogen atom, an alkyl group or an aryl group, or each pair of R 2 and R 3 , and R 4 and R 5 , which are independent of each other, may form together a cyclic alkyl group, R 6 is a hydroxyl group, an alkoxyl group, an aralkyloxy group, a group represented by -OSi(R 8 R 9 R 10 ) (provided that each of R 8 , R 9 and R 10 which are independent of one another, is an alkyl group or an aryl group), a phosphate group or a group represented by S(C=O)R 11 (provided that R 11 is an alkyl group or an aryl group), and R 7 is a hydrogen atom, a halogen atom, an alkyl group or an alkoxyl group, is let generate chemiluminescence by means of an activator (selected from the group consisting of a base, an acid, a salt, a fluorine compound, an enzyme, a catalyst and an amine compound), a cationic surfactant and a fluorescent material.
摘要:
The present invention relates to a chemical compound comprising a light emitting moiety precursor (eg. acridine, luciferine) and a precursor of a leaving group (eg. oxazine, anilide), bound to each other by an amide or by an ester bond and characterized in that the leaving group precursor upon oxidation is converted into the leaving group. The invention also relates to compounds additionally comprising a coupling group to the use of such compounds for labeling of biomolecules and more generally to the use of such compounds in chemiluminescence detection procedures.
摘要:
Systems and methods are disclosed for treating biological fluids carrying contaminants by photoactivating materials mixed with the fluids. The system (10) comprises a vessel (12) having a transparent region and containing a solution (14) comprising a photoactive material which undergoes reduction oxidation in response to exposure to a prescribed light energy, and a reducing agent mixed with the photoactive material.
摘要:
The invention relates to a method for determining the concentration of dissolved oxygen in a liquid water sample comprising the steps: (a) providing a liquid water sample of predetermined volume, the oxygen content of which is to be determined; (b) mixing additives with the liquid water sample to form a mixture, the additives comprising an oxidizable metal salt comprising a metal cation and an anion selected from an inorganic anion or an organic anion which, with the cation, results in a water soluble oxidizable metal salt, at least one water soluble alkali metal compound selected from an alkali metal oxide, or an alkali metal hydroxide or a salt of an alkali metal and a weak acid; and at least one oxidation-reduction indicator capable of a color change upon oxidation of the oxidizable metal salt during contact with dissolved oxygen in the liquid sample to a color indicative of the concentration of dissolved oxygen in the liquid sample; (c) preventing any substantial contact of the mixture with atmospheric oxygen; and (d) determining the concentration of dissolved oxygen in the liquid sample by comparing the color of the mixture to a predetermined color indicative of the concentration of dissolved oxygen in the water sample.
摘要:
Disclosed is an improved method for the detection of creatinine in a fluid test sample by contacting the test sample with cupric ions, a hydroperoxide, citrate and an oxidizable dye which gives a colored response in the presence of oxygen free radicals and a pseudoperoxide. The improvement involves stabilizing the reagent formulation by the addition thereto of an ionizable phosphate containing compound such as phytic acid.
摘要:
The application concerns oxidative metabolism in smooth muscle cells and to methods and materials related thereto. Provided is a method which in a medium suitable for the support of oxidative metabolism comprises (i) incubating a cell or tissue sample with a specimen deriving from a patient wherein the sample comprises smooth muscle cells; (ii) measuring a marker of oxidative metabolism of the cell or tissue sample; and (iii) detecting an increase in oxidative metabolism which is not attributable to a contractile demand for ATP, such an increase in oxidative metabolism being indicative of the existence in a patient of an agent or combination of agents able to cause an increase in oxidative metabolism in smooth muscle cells.