摘要:
The invention provides methods and compositions for detection and removal of sulfate from a liquid. The method provides much faster removal of sulfate than the prior art does and does so while requiring the use of far less aluminum. The method involves sequentially adding an acidic to neutral pH generating aluminum agent to the liquid, an alkaline pH generating aluminum agent to the liquid, after having added the acidic to neutral pH generating aluminum agent, and an alkaline calcium agent to the liquid. The most efficient rate possible can be obtained by also using a flourophore to precisely determine the amount of sulfate in the liquid.
摘要:
A device for the detection of a peroxide-based explosive, in particular, triacetone triperoxide (TATP), which is based on a molecular controlled semiconductor resistor (MOCSER) and composed of at least one insulating or semi-insulating layer, at least one conducting semiconductor layer, two conducting pads and a layer of multifunctional organic molecules capable of adsorbing molecules of said peroxide-based explosive. Further is provided an array of semiconductor devices for the selective detection of a peroxide-based explosive, as well as a method for the selective detection of vapors of a peroxide-based explosive in a gaseous mixture using said array. The multifunctional organic molecules are from the group of cyclodextrins, thiols or alkylphosphonates with RPO (OH) 2 wherein R is an aliphatic hydrocarbyl with C6-C22.
摘要:
A method for detecting the onset of ovulation in a female mammal is provided. The method comprises contacting mouth air of the female mammal with an arylmethane test chromogen in an amount effective to undergo a rapid and detectable color change in the presence of one or more volatile sulfur compounds. The color of the test chromogen is compared to a control color that corresponds to a pre-ovulatory sulfur content. The difference in color between the test chromogen and the control color is correlated to the onset of ovulation.
摘要:
The present invention relates to a novel biomarker which can be used to determine the extent of interference of a substance with the farnesyl pathway.
摘要:
The present invention relates to articles and methods involving luminescent films which may be useful in various applications. Luminescent films of the present invention may comprise a layer of metal oxide nanoparticles and, in some cases, may interact with an analyte to generate a detectable signal, whereby the presence and/or amount of analyte can be determined. In some embodiments, fluorescence resonance energy transfer (FRET) may occur between the luminescent film and the analyte. Such articles and methods may be useful in, for example, biological assays or in sensors.
摘要:
The present invention provides a method for analyzing gases such as carbon dioxide. Economical on-site analytical capabilities are provided for by concentrating the impurities prior to their analysis.
摘要:
The present invention relates to the treatment of a wide array of diseases and physiologic conditions based on modulating the level of hydrogen sulfide (H2S) in the body by at least partially eradicating small intestinal bacterial overgrowth (SIBO) in the gut. An H2S or lactulose breath test and/or detection of H2S or thiosulfate in the blood or urine may be used as a diagnostic and/or prognostic for assessing a systemic H2S load that exceeds a mammal's natural detoxification capacity. These tests may similarly be used to monitor the effectiveness of a therapeutic intervention for SIBO and/or the diseases or physiologic conditions whose pathology is linked thereto. Because SIBO is related to hyperhomocysteinemia, diseases and physiologic conditions that relate to hyperhomocysteinemia may further be monitored and treated in connection with the methods of the present invention.
摘要:
A method and apparatus to monitor the enantiomeric excess of chiral molecules participating in a chemical reaction. The method includes real time monitoring of the chemical reaction by obtaining a VCD spectra and an IR spectra of the chemical compounds in the reaction, and manipulating the spectra to obtain a % EE value. Using such real time information, the reaction parameters can be changed to shift the reaction to produce more of one chiral molecule than another.
摘要:
The present invention provides for a method of monitoring the concentration of a sulfate salt present in a solution. In accordance with this aspect of the present invention, the concentration of sulfate salt present in the solution is monitored by titrating a known concentration of a barium salt solution with a test sample of the solution containing an unknown amount of sulfate salt under conductivity titration conditions.
摘要:
An indicator for assessing body odor containing at least one member selected from the group consisting of: a component (A) which is a beta-hydroxycarboxylic acid compound represented by the following general formula (1); a component (B) which is a derivative of the above compound represented by the general formula (1); a component (C) which is an alcohol compound having a mercapto group at the 3-position as represented by the following general formula (2); and a component (D) which is a derivative of the above compound represented by the general formula (2). Also it is intended to provide a process for producing the above compound represented by the general formula (2) which comprises incubating human-origin perspiration in an environment with an oxygen concentration of 10 v/v% or below. Further, it is intended to provide a kit for assessing human body odor which contains a color developing reagent reacting with a human perspiration-origin beta-hydroxycarboxylic acid. General formula (1) wherein R represents C1-4 alkyl; and R represents hydrogen or C1-4 alkyl, provided that the total carbon atom number is not more than 10. General formula (2) wherein R represents hydrogen or methyl; R represents C1-3 alkyl; and R represents hydrogen or methyl, provided that the total carbon atom number is not more than 8.