2.Response surface optimization of microwave-assisted extraction for HPLC-fluorescence determination of puerarin and daidzein in Radix Puerariae thomsonii
Yingkun LIU ; E YAN ; Hanying ZHAN ; Zhiqi ZHANG
Journal of Pharmaceutical Analysis 2011;01(1):13-19
Microwave-assisted extraction was optimized with response surface methodology for HPLC-fluorescence determination of puerarin and daidzein in Radix Puerariae thomsonii.The optimized extraction procedure was achieved by soaking the sample with 70% methanol(1∶15,v/v)for 30 min,and then microwave irradiation for 11 min at a power of 600 W.Coupling the extraction process with HPLC-fluorescence presented good recovery,satisfactory precision,and good linear relation.Compared with a method from the Chinese Pharmacopoeia,the proposed method enables higher extraction efficiency and more accurate analytical results.It can be of potential value in quality assessment of Radix Puerariae thomsonii medicinal materials.
4.Study on solid dispersion of precipitated calcium carbonate-based oleanolic acid.
Hong-mei YAN ; Zhen-hai ZHANG ; Xiao-bin JIA ; Yan-rong JIANG ; E SUN
China Journal of Chinese Materia Medica 2015;40(10):1935-1938
Oleanolic acid-precipitated calcium carbonate solid dispersion was prepared by using solvent evaporation method. The microscopic structure and physicochemical properties of solid dispersion were analyzed using differential scanning calorimetry and scanning electron microscopy (SEM). And its in vitro release also was investigated. The properties of the precipitated calcium carbonate was studied which was as a carrier of oleanolic acid solid dispersion. Differential scanning calorimetry analysis suggested that oleanolic acid may be present in solid dispersion as amorphous substance. The in vitro release determination results of oleanolic acid-precipitated calcium carbonate (1: 5) solid dispersion showed accumulated dissolution rate of.oleanolic acid was up to 90% at 45 min. Accelerating experiment showed that content and in vitro dissolution of oleanolic acid solid dispersion did not change after storing over 6 months. The results indicated that in vitro dissolution of oleanolic acid was improved greatly by the solid dispersion with precipitated calcium carbonate as a carrier. The solid dispersion is a stabilizing system which has actual applied value.
Calcium Carbonate
;
chemistry
;
Calorimetry, Differential Scanning
;
Chemistry, Pharmaceutical
;
Drug Carriers
;
chemistry
;
Drug Stability
;
Microscopy, Electron, Scanning
;
Oleanolic Acid
;
chemistry
;
Plant Extracts
;
chemistry
;
Solubility
6.Application of GeneScan analysis technique in detection of T-cell receptor gene rearrangement in lymphoma.
Jing ZHANG ; Tai-ming ZHANG ; Fei YANG ; Xu CAI ; Xiao-yan ZHOU
Chinese Journal of Pathology 2013;42(9):615-617
Adolescent
;
Adult
;
Aged
;
Aged, 80 and over
;
Female
;
Gene Rearrangement, T-Lymphocyte
;
Humans
;
Lymphoma
;
genetics
;
Lymphoma, Extranodal NK-T-Cell
;
genetics
;
Lymphoma, Large-Cell, Anaplastic
;
genetics
;
Lymphoma, T-Cell, Peripheral
;
genetics
;
Male
;
Middle Aged
;
Polymerase Chain Reaction
;
methods
;
Young Adult
7.Expression and clinicopathologic significance of Furin in cervical carcinomas.
Leilei ZHANG ; Zhulei SUN ; Qiang LIU ; Yan ZHANG ; Hong JING ; Jiang WU
Chinese Journal of Pathology 2014;43(1):36-37
Adult
;
Aged
;
Cervical Intraepithelial Neoplasia
;
metabolism
;
pathology
;
Cervix Uteri
;
metabolism
;
pathology
;
Disease Progression
;
Female
;
Furin
;
genetics
;
metabolism
;
Humans
;
Matrix Metalloproteinase 14
;
metabolism
;
Middle Aged
;
RNA, Messenger
;
metabolism
;
Uterine Cervical Neoplasms
;
metabolism
;
pathology
;
Vascular Endothelial Growth Factor C
;
metabolism
;
Young Adult
8.Granular cell tumor of appendix: report of a case.
Zongyuan YE ; Xiushan ZHANG ; Yulan ZHANG ; Junning YAN
Chinese Journal of Pathology 2014;43(4):276-277
Adult
;
Antigens, CD
;
metabolism
;
Antigens, Differentiation, Myelomonocytic
;
metabolism
;
Appendectomy
;
Appendiceal Neoplasms
;
complications
;
metabolism
;
pathology
;
surgery
;
Appendicitis
;
etiology
;
surgery
;
Diagnosis, Differential
;
Female
;
Granular Cell Tumor
;
complications
;
metabolism
;
pathology
;
surgery
;
Humans
;
Paraganglioma
;
metabolism
;
pathology
;
Phosphopyruvate Hydratase
;
metabolism
;
S100 Proteins
;
metabolism
9.Study on sustained release preparations of Epimedium component.
Hong-mei YAN ; Dong-mei DING ; Zhen-hai ZHANG ; E SUN ; Jie SONG ; Xiao-bin JIA
China Journal of Chinese Materia Medica 2015;40(8):1484-1488
The formulation for sustained release tablet of Epinedium component was selected and the evaluation equation of in vitro release was established. The liquidity of component was improved with the help of colloidal silica aided by spray drying, which would be the main drug in the sustained release tablets. Dissolution was selected as an evaluation index to investigate skeletal material type, fillers, impact porogen, lubricants and other materials on the quality of sustained release tablet. The sustained release tablets were prepared by dry compression. Formulation of sustained release preparations was main drug 35%, HPMC K(4M) 20% and HPMC K(15M) 10% as skeleton material, MCC 31% as filler, PEG6000 2% as porogen and magnesium stearate 2% as lubricant. The sustained release tablets released up to 80% in 8 h. The zero order equation, primary equation and Higuchi equation could simulate the release characteristics of sustained release tablets in vitro, the correlation coefficients r were larger than 0.96. The primary equation was most similar in vitro release characteristics and its correlation coefficient r was 0.9950. The preparation method is simple and the results of formulation selection are reliable. It can be used to guide the production of Epimedium component sustained release preparations.
Chemistry, Pharmaceutical
;
methods
;
Delayed-Action Preparations
;
chemistry
;
Drugs, Chinese Herbal
;
chemistry
;
Epimedium
;
chemistry
;
Kinetics
;
Tablets
;
chemistry