Phosphonium-based room temperature ionic liquids (“RTILs”) were prepared. They were used as matrices for Matrix-Assisted Laser Desorption Ionization (MALDI) mass spectrometry and also for preparing samples of dyes for analysis.
BENZOTHIAZOLESULFONAMIDE DERIVATIVE, PROCESS FOR PRODUCING THE SAME, AND USE THEREOF
申请人:Asahi Kasei Kogyo Kabushiki Kaisha
公开号:EP0638564A1
公开(公告)日:1995-02-15
A benzothiazolesulfonamide derivative represented by general formula (1) and having the activity of inhibiting protein phosphorylases such as protein kinase C and myosin light-chain kinase, a pharmaceutically acceptable acid-addition salt thereof, a process for producing the same, a medicinal composition containing the same, and a drug containing the same as the active ingredient for treating or preventing asthma on the basis of the protein phosphorylase inhibitor activity. In formula (1) A represents lower alkylene; R¹ represents hydrogen or lower alkyl; R² and R³ represent each independently hydrogen or lower alkyl, or they are combined together to represent lower alkylene; and R⁴ represents hydrogen, lower alkyl, amidino or phenyl-lower alkyl, wherein the phenyl group is mono- or disubstituted by lower alkyl, lower alkoxy, halogen or methylenedioxy.
A fluorometer may be used to measure ultralow concentrations of fluorescing species, such as ultralow concentrations of fluorescent tracer passing through a reverse osmosis membrane into a permeate stream. In some examples, the fluorometer may be recalibrated by resetting some but not all of the calibration parameters used to determine the concentration of fluorescent tracer in the permeate based on the measured fluorescent response of the fluorometer. For example, an intercept of a calibration curve may be reset or recalibrated for the fluorometer in situ, potentially providing significant accuracy improvements even though the fluorometer has not undergone a full recalibration.
Disclosed are corrosion inhibitor compounds and compositions useful for preventing or inhibiting corrosion of surfaces found in cooling water applications. In some embodiments, the surfaces may include mild steel, aluminum, brass, copper, galvanized steel, a copper alloy, admirality brass, or any combination thereof. Also disclosed are methods of using the compounds and compositions as corrosion inhibitors. In some embodiments, the corrosion inhibitor compounds and compositions are used in cooling water applications.
Method of monitoring membrane separation processes
申请人:——
公开号:US20040185472A1
公开(公告)日:2004-09-23
Methods and systems for monitoring and controlling membrane separation systems are provided. The present invention uses measurable amounts of one or more inert fluorescent tracers added to a feed stream to evaluate and/or control the unit operation of processing such feed stream during membrane separation. The methods and systems of the present invention can be used in a variety of different industrial applications including raw water processing and waste water processing.