[Comparative Study on Efficiency of Extraction of Boiling Powder and Traditional Herbal Piecesâ . Part of Root and Rhizome,Flower,Leaf and Whole Plant Medicinal Materials].

Objective: To compare the efficiency of extraction of boiling powder and traditional herbal pieces of root and rhizome, flower, leaf and whole plant medicinal materials for providing a reference for the study and clinical application of boiling powder. Methods: 19 kinds of root and rhizome herbs, the 4 kinds of flower medicinal materials, the 2 kinds of leaf medicinal materials and the 2 kinds of whole plant medicinal materials were chosen as the researh object and were crushed into boiling powder. The contents of the active ingredients and dry extract rate in the water decoction were set as the index to compare the extraction efficiency of boiling powder and traditional herbal pieces. Results: Boiling powder was added ten times of water, decocted one time, decoction time was only ten min, the dry extract rate and the concentration of ingredients in the decoction of boiling powder were not less than those in the traditional decoction of herbal pieces( ten times of water, decoction time was 50 min),this difference was mainly caused by the different of texture density and size of the medicinal materials. Conclusion: The boiling powder can not only save time and facilitate the patient, but also save a lot of medicinal materials from the perspective of chemical medicine, which is beneficial to the sustainable development of medicinal material resources.

[Comparative Study on Boiling Powder and Traditional Herbal Pieces of Rhubarb].

Objective: To optimize the particle size of rhubarb boiling powder, to determine decoction process of rhubarb boiling powder through the comparative study with traditional herbal pieces. Methods: Three kinds of particle size of rhubarb boiling powder were prepared. The content of aloe emodin,rhein, emodin, chrysophanol and emodin monomethyl ether were detected by HPLC,and to determine particle size of rhubarb boiling powder according to the content of total chemical ingredients and dry extract rate in water decoction. The effect of the amount of water and decocting time on decoction of boiling powder and traditional herbal pieces of rhubarb were systematically investigated by using single factor test. Results: Firstly, the content of 2 mm to 0. 18 mm particles in rhubarb boiling powder can not be less than 80%. Total anthraquinone content and dry extract rate had no significant difference in the decoction of boiling powder in the amount of water between 14 ~ 20 times; decocting time had no significant effect on total anthraquinone and dry extract rate; the content of combined anthraquinone decreased significantly, while the decocting time was more than 20 min. The decocting time had great influence on the herbal pieces, with ten times of water,and decocting 5 ~ 50 min each time, the compound content and dry extract rate of boiling powder were 3. 23 ~ 9. 48 times and 1. 61 ~ 3. 44 times than that of traditional herbal pieces, and with the extension of the decocting time, the gap was narrowing. Conclusion: Preparation process of rhubarb boiling powder is simple and suitable for industrial production, boiling powder can save more than half of the amount of traditional herbal pieces with ten times of water, decocting one times, decoction time of 10 ~ 15 min.

[Study on preparation process and quality control of jiangtangyin teabag].

OBJECTIVE: To study preparation technology and establish the quality standard of Jiangtangyin teabag. METHODS: An orthogonal test was adopted in this study. The transter rate of puerarin and the dried extraction rate were used as indices for optimizing the extraction condition. Quality standards of Jiangtangyin teabag were established by TLC and HPLC method. RESULTS: The best extraction technology was as follows: The drugs were extracted for 3 times, the ratio of water to solid was 10, 8 and 8, respectirely, the extracting time was 1.5 h, 1 h and 1 h respectively. The speckles of TLC method were distinct, accurate and sensitive. The calibration curve of puerarin was linear in the range of 0.168 - 0.84 microg, r2 = 0.9997. CONCLUSION: The preparation process is reasonable and feasible. The methods of quality control are scientific and can be used to control the quality of the Teabag.

[Effects of early growth stage shading on rice flag leaf physiological characters and grain growth at grain-filling stage].

In a pot experiment, rice plants were shaded during the period from transplanting to booting, aimed to study the effects of early growth stage shading on the rice growth at grain-filling stage. Comparing with the control, early growth stage shading decreased the tiller number by 26.72%, but increased the flag leaf area and soluble sugar content by 33.86% and 30.23%, respectively. The filled-grain number per panicle, 1000-grain mass, ultimate brown rice mass, and maximum and average grain-filling rates decreased by 8.65%, 4.81%, 9.74%, 20.22%, and 19.13%, and the effective panicle number and grain yield declined by 25.26% and 39.56%, respectively. The peak time of grain-filling rate (Tm) advanced 1.66 days, while the grain-filling time (T99) prolonged 6.80 days. For shading-tolerance variety, its flag leaf Chl a, Chl b, and Chl (a + b) contents at early and mid grain-filling stages, and the protein N and soluble sugar contents and Chl a/b in its flag leaves at grain-filling stage all increased under early growth stage shading, and the ultimate brown rice mass and 1000-grain mass maintained at the similar levels as the control. Consequently, its grain yield reduction rate was lower than that of shading-sensitive variety.