[Spatiotemporal Distributions and Ecological Risk Assessments of Typical Antibiotics in Surface Water of Taihu Lake].

Using solid phase extraction-high performance liquid chromatography tandem mass spectrometry, antibiotics belonging to four classes (i.e. sulfonamides, quinolones, tetracycline, and macrolides) in the surface water of Taihu Lake were monitored monthly for a year.

[A new triterpenic acid from the roots of Rosa laevigata].

This study was designed to investigate triterpenoids from the roots of Rosa laevigata Michx. The silica gel column chromatography was used to separate the chemical constituents from the roots of Rosa laevigata Michx. HPLC was used to analyze its purity and chemical constitution.

A new picfeltarraenone glycoside from Picria fel-terrae.

Aim: To investigate the chemical constituents from Picria fel-terrae Lour.

Methods: Column chromatography techniques were used to isolate the chemical constituents, physico-chemical constants and spectroscopic analysis were employed for structural elucidation. Results Two triterpenoids named picfeltarraenone I (1) and picfeltarraenin XI (2) were isolated, and their structures were established to be 3,11,22-trioxo-16alpha-hydroxy-(20S,24)-epoxy-cucurbit-5,23-diene (1) and 3,11,22-trioxo-16alpha-hydroxy-(20S,24)-epoxy-cucurbit-5, 23-diene-2beta-O-beta-D-glucopyranoside (2), respectively.

[Absorption spectra study of the association nanoparticle system of berberine-[AuI4]- and its analytical application].

In 0.008 mol x L(-1) HCl medium, [AuCl4]- and I- combine to form [AuI4]-. [AuI4]- reacts with berberine (BB) to form (AuI4-BB) association molecule.

[Spectral properties of the association particle system of quinine-[PtI6]2- and its analytical application].

In 0.01 mol x L(-1) HCl medium, red color [PtI6]2- and quinine combine to form association molecule. The molecules aggregate automatically owing to strong hydrophobic and molecular forces.

[Effects of Naomaitai capsule on learning and memory and content of Ach in rat model produced by cerebral ischemia-reperfusion].

Objective: To observe the effects of Naomaitai capsule on the learning and memory abilities and the content of acetylcholine(Ach) in the brain tissue of the model rat.

Method: One vascular dementia(VD) model was produced by occlusion of bilateral common carotid arteries in rats with following steps: ischemia 20 minutes-reperfusion 10 minutes-ischemia 20 minutes. The learning and memory abilities were tested by water maze.

[Study on the chemical constituents from Picria fel-tarrae].

Objective: To isolate and identify compounds from Picria fel-tarrae in order to utilize it better.

Method: Constituents from Picria fel-tarrae were isolated by several column chromatography and their structures were elucidated on the basis of chemical and spectral analysis.

Result: Six compounds, N-benzoylphenylalanyl-L-phenylalaninol acetate (1), 1-hydroxy-7-hydroxymethyl-9,10-anthraquinone (2), 9, 16-dioxo-10,12,14-octadeca-trienoic acid (3), 5,7,4'-trihydroxy-flavone (4), beta-sitosterol (5), and daucosterol (6) were obtained from the fraction with relatively low polarity of EtOH extract of Picria fel-tarrae.

[Determination of linarin in Yuye Jiedu granule by RP-HPLC].

Objective: To determine the content of linarin in Yuye Jiedu granule.

Method: A HPLC method was developed. The chromatographic conditions are as follows Luna C18 column and acetonitrile-0.

[Resonance Rayleigh scattering spectra of berberine-tetraphenylboron association nanoparticle and its analytical application].

Aim: To study the relationship between resonance Rayleigh scattering(RRS) and the formation of association nanoparticle, and to develop a new and sensitive RRS method for the determination of trace berberine (BB).

Methods: The association nanoparticle between BB and tetraphenylboron (TPB) was investigated by means of RRS, absorption spectral method and transmission electron microscope (TEM).

Results: In pH 5.

[Kinetic study on the volatility of menthol and borneol].

Objective: To study the volatile regularity of menthol and borneol in granule and lozenge at different temperature.

Method: Kinetic method with GC being detection technique.

Result: The volatility of menthol and borneol acts as a pseudo first-order reaction in open system.