Queuing Time Prediction Using WiFi Positioning Data in an Indoor Scenario.

Queuing is common in urban public places. Automatically monitoring and predicting queuing time can not only help individuals to reduce their wait time and alleviate anxiety but also help managers to allocate resources more efficiently and enhance their ability to address emergencies. This paper proposes a novel method to estimate and predict queuing time in indoor environments based on WiFi positioning data.

[Extraction, purification technology and antineoplastic effects of solamargine].

Objective: To extract and purify of solamargine from Solanum nigrum, and to research its antineoplastic effects.

Method: S. nigrum was extracted refluently with 80% alcohol, solamargine was purified with silica gel column chromatography and recrystallization, and then conducted its structure identification and purity checks.

Quantitative determination and pharmacokinetic study of solamargine in rat plasma by liquid chromatography-mass spectrometry.

A sensitive and simple liquid chromatography-mass spectrometry (LC-MS) method has been developed and validated for the quantification of solamargine, a steroidal glycoalkaloid, in rat plasma. Vincristine was selected as the internal standard. Sample preparation involved simple liquid-liquid extraction by ethyl acetate with high efficiency.

[Optimization of extraction process of total amino acid from Bubali Cornu by orthogonal test].

Objective: To optimize the extraction conditions of the total amino acid from Bubali Cornu.

Method: An orthogonal test of L9 (3(4)) was designed to select optimum exaction conditions of the total amino acid. The influence of solvent concentration, the dosage of solvent and time of extraction were investigated with the content of total amino acid and thrombin-induced fibrin clotting time as index.