Folic acid (FC) is a water-soluble vitamin of B complex family. Folate is the nature form of FC. Due to FC can not be stored in the human body. Therefore, FC deficiency is one of the most common vitamin deficiencies. FC supplements daily is very important for people. FCrich chicken eggs are the functional and popular product in Japan and Taiwan. Therefore, the establishment of the detection methods for the precise quantitative of folate and FC metabolite in chicken eggs is need. In this study, microbiological methods and LC-MS/ MS for the folate and FC metabolite quantification in chicken eggs were successfully established.
A rapid detection of the local anesthetic ropivacaine was measured by electrochemical impedance method. Polypyrrole (Ppy) and polypyrrole (Ppy)-graphene oxide (GO) composites were prepared by electrochemical polymerization on the gold electrode as the working electrode. The electrochemical properties of the Ppy and Ppy-GO composites electrode were characterized by transmission electron microscopy (TEM), scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). Various concentrations from 1 to 20 ppm of ropivacaine were prepared in 0.9% NaCl as the sample solution. Prepared Ppy and Ppy-GO were used as working electrodes, and the sample solution had been measured for a sinusoidal excitation in the frequency range of 100 Hz to 1 MHz. It exhibited the better linearity (R2=0.973) of Ppy/1% GO than Ppy (R2=0.882) from 1 to 20 ppm when the frequency fixed in 100 kHz. All the response and recovery time of 0.1 ppm local anesthetic ropivacaine can be detection in this system within 1 sec, it will be a promising composite material on electrochemical electrode.
Reported in this paper is an investigation of the process parameter effects on surface roughness and subsurface damage (SSD) in CMP of single crystalline Silicon. For the given experiments, the appropriate method to examine the SSD can be obtained. The surface roughness and figure accuracy were measured with an atomic force microscope (AFM) and Taylor-Hobson profilometer. The experiments results indicate proper process parameter for the best surface roughness, which can be divided into two stages. It should use longer time in the finish polishing stage, while shorter time and reduce the ratio of polishing pads and head in the ultra-finish polishing stage. Generally speaking, the isotropic etching of single crystalline Silicon, anisotropic etching of single crystalline Silicon and hand burnishing are mostly used to find the SSD and it is found that the last method is the best one to see the SSD by SEM.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.