OBJECTIVE: To study the preparation and quality standard of chitosan-oxaprozin sustained release tablets, and observe the rule of in vitro release of oxaprozin. METHODS:The content of oxaprozin in the tablets was determined by UV - spectrophotometry. RESULTS:The linear range was 2. 5- 15. 0ug/ml. The average recovery was 99. 79% with a RSD of 0. 38%. CONCLUSION: The preparation process of chitosan-oxaprozin sustained release tablet is simple. It is worth expanding the app- lication in clinical practice.

OBJECTIVE:To prepare Sanzi capsules and establish the Standard of its quality.METHODS:Water decocting method was applied to extract physic liquor,thin-layer chromatography(TLC)was used for qualitative identification,and high efficiency liquid chromatography(HPLC)was used to determine the content of Jasminoidin in the preparation.RESULTS:Feature spots of Fructus Gardeniae,Fructus Chebulae,Fructus Toosendan were identified by TLC,with no sensible interference seen in the negative control.The linear range for Jasminoidin was 3.0～ 30? g? mL-1(r=0.999 9)with average recovery rate at 100.06%(RSD=1.17%).CONCLUSION:The preparation method is well-grounded,highly-specific and reproducible in property identification,accurate and reliable in content determination,and can be used for the quality control of Sanzi capsules.

OBJECTIVE: To prepare lornoxicam chitosan gel and to study its quality control method. METHODS: Lornoxicam chitosan gel was prepared with chitosan as excipient. The content of lornoxicam was determined by HPLC. The stability of the preparation was studied by accelerated test and centrifugation. RESULTS: The prepared gel was well-spread, with linear range at 12.5～125.0?g?mL-1 and average recovery at 100.02%(RSD=1.18%). The indexes of stability all met the standard. CONCLUSION: The preparing technology of lornoxicam chitosan gel is simple, and its quality is stable reliable.

OBJECTIVE:To study the preparation process and quality standard of ondansetron hydrochloride dispersible tablets METHODS:The content of ondansetron in the dispersible tablets was determined by UV-spectrophotometry RESULTS:The linear range was 4 0～16 5?g/ml,the average recovery was 99 97% with RSD of 0 35% CONCLUSION:The preparation process of ondansetron hydrochloride dispersible tablets is simple and the quality of dispersible tablets is controllable

Parkinson′s disease (PD) is a neurodegenerative disorder, and the abnormal levels of its pathological marker ɑ-synuclein (ɑ-syn) are often accompanied by imbalanced heavy metal homeostasis. However, the underlying mechanisms remain unclear, with limited research. This review explores the interactions between iron, copper, zinc, and manganese with pathological ɑ-syn′s abnormal expression, aggregation, and degradation in development and progression of PD. It also discusses potential therapeutic directions for addressing heavy metal imbalances in PD patients.