摘要:
Disclosed is a method for simultaneous analysis of neurotransmitters and/or their metabolites. The method includes (a) separating analytes including a plurality of neurotransmitters and/or their metabolites from a sample selected from body tissues, body fluids, secretions, and excretions, (b) derivatizing the analytes with ethyl chloroformate to obtain derivatives of the plurality of neurotransmitters and/or their metabolites, (c) separating the derivatives of the plurality of neurotransmitters and/or their metabolites by liquid chromatography, and (d) subjecting the separated derivatives of the neurotransmitters or their metabolites to multiple reaction monitoring (MRM) using a mass spectrometer. According to the method, a plurality of neurotransmitters in a very small amount of sample can be simultaneously analyzed in an accurate and rapid manner based on derivatization to increase the stability and ionization efficiency of the substances.
摘要:
Compounds and methods for use in detecting pregabalin in a sample suspected of containing pregabalin are disclosed. Pregabalin derivatives are described for producing pregabalin conjugates. A pregabalin-immunogenic carrier conjugate may be used as an immunogen for the preparation of an anti-pregabalin antibody. A pregabalin-detectable label conjugate may be used in a signal producing system in pregabalin assays.
摘要:
Compounds and methods for use in detecting pregabalin in a sample suspected of containing pregabalin are disclosed. Pregabalin derivatives are described for producing pregabalin conjugates. A pregabalin-immunogenic carrier conjugate may be used as an immunogen for the preparation of an anti-pregabalin antibody. A pregabalin-detectable label conjugate may be used in a signal producing system in pregabalin assays.
摘要:
An apparatus is configured to detect a beverage that is contaminated with a substance. The apparatus may include a testing material, wherein the testing material may comprise a cavity having a complimentary shape to a molecule associated with the substance. The apparatus may include a taste substance filling the cavity, wherein the taste substance filling the cavity may bleed out into the beverage when the molecule associated with the substance in the beverage replaces the taste substance filling the cavity, wherein a taste of the beverage may change when the taste substance bleeds out into the beverage as an indicator that the substance is present in the beverage.
摘要:
A method is described for mass spectrometric analysis, detection and quantification of catecholamines. The methods can comprise reacting the catecholamines with a 4-aminoantippyrine reagent and detecting and/or quantifying the adduct produced by the reaction. The methods can also allow for multiplexing. Compounds formed by the reactions are also provided.
摘要:
An apparatus may be configured to test a beverage, the apparatus may include but is not limited to, a food container, wherein the food container includes a material. An indicator may be combined with at least a portion of the material of the food container, wherein the indicator may be associated with a brand profile that may identify a brand of the food, wherein the indicator may visibly react when the indicator is contacted with the food to show whether the food is identified as the brand of the food, and wherein the visible reaction may be shown on at least the portion of the material of the food container via the indicator combined with at least the portion of the material of the food container.
摘要:
An array of methods for assessing vaginal atrophy are disclosed. The methods may be used alone or in combination with a treatment or as part of a kit.
摘要:
An apparatus may be configured to test a beverage, the apparatus may include but is not limited to, a beverage container that may be configured to hold a beverage, wherein the beverage container may include a material. An indicator may be chemically bonded to at least a portion of the material of the beverage container, wherein at least the portion of the material of the beverage container may include the indicator, wherein the indicator may be associated with at least part of a brand profile to identify a beverage brand's beverage, wherein the indicator may visibly react when the indicator is contacted with the beverage to show whether the beverage may be identified as the beverage brand's beverage, and wherein the visible reaction may be shown on at least the portion of the material of the beverage container via the indicator chemically bonded to at least the portion of the material of the beverage container.
摘要:
An assay for identifying ligands of the σ1 receptor based on a fusion protein comprising the σ1 receptor flanked by two fluorophores, so that said fluorophores are capable of producing constitutive FRET when no ligand is bound to the σ1 receptor. The fusion protein of the invention also allows the simultaneous determination whether the newly determined ligand is an agonist or an antagonist. Said fusion protein has been expressed in a cell, giving rise to a new cellular model useful for identifying σ1 receptor ligands, and additionally for discriminating between agonists and antagonists.
摘要:
A method is provided for in vivo detection of a biochemical substance in an animal by culturing neurofluocytes that stably express a receptor of the biochemical substances by transfecting cells with cDNA of the receptor and a tag that will emit a detectable energy in the presence of the biochemical substance, implanting the neurofluocyte into the animal's brain; and detecting the energy emission of the tag. In a first embodiment, the biochemical substance is a neurotransmitter, the tag is a fluophore, and the step of detecting includes forming an opening in the animal's skull and optically detecting fluorescent emissions using a two-photon laser scanning microscope. Multiple biochemical substances can be simultaneously detected by culturing neurofluocytes that express different receptors and have different fluophor tags that produce fluorescent signals at distinguishable wavelengths.