Preparation technology of effective fraction of Catharsius molossus based on determination of effective composition and characterization of physico-chemical property / 中国中药杂志

<p><b>OBJECTIVE</b>To optimize the preparation technology of effective fraction of Catharsius molossus, and investigate the feasibility of process control by the physical and chemical characterization of extracts.</p><p><b>METHOD</b>Used single-factor test method, choosed the main effective components of peptides and amino acids as indexes, combined with theology, chemistry, electricity, and other characterization, the study researched the prepared technology of effective fraction of C. molossus including extraction, concentration, separation, purification, drying and so on.</p><p><b>RESULT</b>The optimal preparation technology of effective fraction of C. molossus was that soaked an amount of crude drugs with three times of 85% ethanol for 48 h, added 10 times of 85% ethanol, percolated in 4 mL x min(-1) x kg(-1), collected percolation liquid, concentrated to 1:1 at 50-55 degrees C, removed fat by frozen, adopted DA201-C macroporous resin, used 1 BV of water and 4 BV of 70% ethanol as eluting agent, collected eluant respectively. The water part was concentrated and dried, then washed twice with 85% ethanol, collected washing liquid and mixed with 70% ethanol eluant. The product was obtained by concentrating and dring. At the same time, the liquid-phase system of each link was characterized in preparation of effective fraction of C. molossus, which showed that the surface tension related to polypeptide was essentially unchanged, and the conductivity related to salt decreased by about 90% with ineffective substances closely related to salt The results showed that the preparation technology maximumly retained the effective information, and removed the invalid information.</p><p><b>CONCLUSION</b>The preparation technology of effective fraction of C. molossus is stable and reliable, and the process control in physico-chemical characterization of extracts is feasible.</p>

Researches on relationships between main active ingredients and physical and chemical parameters of dangguibuxue decoction / 中国中药杂志

<p><b>OBJECTIVE</b>To study relationships between the main active ingredients and physical and chemical parameters of dangguibuxue decoction, and to explore the feasibility of characterization the quality of decoction by physical and chemical parameters.</p><p><b>METHOD</b>Solutions of ferulic acid and astragaloside with different concentrations were prepared, of which physical and chemical parameters such as surface tension, pH value and conductivity, etc were determined at 25 degrees C. And polynomial regression analysis was used to analyze these data.</p><p><b>RESULT</b>With the increase of concentration of ferulic acid, pH value was decreased and conductivity was increased. And surface tension was decreased in the aqueous solution of astragaloside. In the combined solution of ferulic acid and astragaloside, ferulic acid was the main influencing pH value and conductivity, while astragaloside was the main factor influencing surface tension.</p><p><b>CONCLUSION</b>On one hand, astragaloside concentration has a significant correlation with surface tension, but almost no correlation with pH value and conductivity. On the other hand, ferulic acid concentration has a strong correlation with pH value and conductivity, but almost no correlation with surface tension. In addition, each parameter has strong anti-interference ability and almost didn't change with the addition of another material. These preliminary results suggested that such characteristic parameters could be used to characterize the decoction quality.</p>

Foam separation for protein of Catharsius molossus / 中草药

Objective To optimize the technique of foam separation from extract of Catharsius molossus.Methods Single factor test was used to examine the key operational parameters by using enrichment ratio,recovery rate,and protein content as the evaluation indexes.Results The best conditions were as follow: airflow velocity,feed concentration,pH value,feed volume,and temperature were 600 mL/min,0.050 g/mL,pH 4,1 000 mL,and room temperature,respectively.Under the condition,the enrichment ratio was 1.56,recovery rate was 85.6%,and protein content was 20.37%.Conclusion Foam separation could be used to concentrate and separate protein from extract of C.molossus with higher recovery rate and protein content.

Application of hydrating swelling kinetic model to Radix et Rhizoma Rhei / 中成药

AIM: To establish a new kinetic model of hydrating swelling and to make experiments of Radix et Rhizoma Rhei (Rhubarb) designed to validate this model. METHODS: The model was set up according to kinetics, residul water analysis was adopted to measure Rhubarb's sakage, and then obtained the fittin curve and kinetic parameters, its goodness of fit was evaluated by analysis of variance. RESULTS: Hydrating swelling model of the vegetable herb had a form of multivariate first order linear differential equation. Rhubarb comformed to three compartment model with ? = 0.3241min -1 , ? = 0.0185min -1 , ?=5.659?10 -3 min -1 , V ∞ T =1.726mL?g -1 , V ∞ 1 =1.008mL?g -1 , V ∞ 2 =0.2814mL?g -1 V ∞ 3 =0.4366mL?g -1 ,K= 0.2186min -1 ,K 12 =0.02426min -1 ,K 21 =0.07422min -1 ,K 13 =6.402?10 -3 min -3 ,K 31 =0.02481min -1 . CONCLUSION: The kinetic model of hydrating swelling has been in accordance with quantitative changes with multivariate first order linear mammary.