ABSTRACT
A rapid quantitative component analysis method for biochar based on near infrared spectroscopy (NIRS) technology was established in this study. Near infrared spectra of 163 samples in 10000-3800 cm-1 (1000-2632 nm) range were collected, and the contents of fixed carbon (FC), volatile matter (VM) and ash of samples were analyzed. A partial least square(PLS) model for FC,VM and Ash was established in the optimized model spectral ranges. The factors were optimized and the raw spectra were pretreated by multiple scatter correction and second derivative(MSC+SD) method. Finally,the prediction performance of predictive model was evaluated. The results showed that the PLS model had a good prediction ability,and the predicted coefficient R2pof actual values vs prediction values for FC, VM and Ash were 0.9423,0.9517 and 0.9265, respectively. Root mean square errors of prediction(RMSEP) were 0.1074,0.1201 and 0.1243,and ratios of prediction to deviation(RPD) were 3.51,4.28 and 2.03,respectively. The PLS model has good accuracy and precision for both of FC and VM, and can be used as a quantitative method for FC and VM contents analysis. Nevertheless,PLS model needs to improve the precision for Ash analysis according to RPD value. The method provides a fast and effective technical means for the quantitative analysis of biochar components.
ABSTRACT
Objective: To study the effects of GSK-3β on the migration ability of hepatocellular carcinoma cells. Methods: Inhibition tests with specific inhibitors of GSK-3 (LiCl and SB216763) and transfection with different plasmids(GSK-3β WT, GSK-3β S9A, and G1D5-6) were used to alter the activity of GSK-3β. The migration ability of SMMC-7221 and Hep3B cells was observed using wound healing assay, transwell assay and the microtubule- organizing center (MTOC) test before and after treatment. Immunocytochemistry was used to investigate the distribution of phospho-GSK-3β. Results: Wound healing assay showed that LiCl and SB216763 decreased the migration of SMMC-7721 cells by 36. 44% and 41. 78%, respectively; and decreased the migration of Hep3B cells by both 26. 66%. Transfection with GSK-3β WT increased the expression of GSK-3β and pGSK-3β, and the migration rate of SMMC-7721 cells decreased to 61. 27%. Transfection with GSK-3β S9A increased GSK-3β expression and had no noticeable influence on pGSK-3β expression, and the migration rate of SMMC-7721 cells decreased to 38. 61%. Transfection with GID5-6 had no noticeable influence on GSK-3β and increased pGSK-3β expression, and the migration rate decreased to 36. 49%. Immunocytochemical staining showed that LiCl blocked pGSK-3β accumulation on cell edge as that in normally cultured cells. MTOC test showed that the MTOC positive rate was above 60% in Hep3B cells before adding inhibitors of GSK-3β, and it decreased after exposure to the inhibitors. Conclusion: GSK-3β plays an important role in migration of hepatocellular carcinoma cells. Inhibitors of GSK-3β can affect the polarization and decrease the migration ability of hepatocellular carcinoma cells.
ABSTRACT
<p><b>OBJECTIVE</b>To optimize the extraction process of root of Polygoni multflori and validate the interrelation between antioxdative capacity and the content of 2,3,4,5-tetrahydroxystilbene-2-O-beta-D-glucoside in root of P. multiflori.</p><p><b>METHOD</b>The optimum extraction was abserved with the orthogonal design; 2,3,4,5-tetrahydroxystilbene-2-O-beta-D-glucoside was determined by HPLC and the antioxidative capacity by using photochemiluminescence detection method with the Photochem supplied by Analytik Jena AG; the concentration of ethanol, amount of ethanol, extraction time and extraction times were the four factors in the extraction.</p><p><b>RESULT</b>The concentration of ethanol and extraction times had significant effect on the content of 2,3,4,5-tetrahydroxystilbene-2-O-beta-D-glucoside and the antioxidative capacity of the crude extract.</p><p><b>CONCLUSION</b>The best extraction process is to extract three times by using 10 fold EtOH(60%), refluxing at 85 degrees C and to extract one and half hours each time.</p>
Subject(s)
Antioxidants , Pharmacology , Chromatography, High Pressure Liquid , Drugs, Chinese Herbal , Pharmacology , Ethanol , Glucosides , Plant Roots , Chemistry , Plants, Medicinal , Chemistry , Polygonum , Chemistry , Stilbenes , Technology, Pharmaceutical , Methods , Time FactorsABSTRACT
Objective To observe the therapeutic effect and toxicity reaction of Oxaliplatin com- bined with XeLoda in the treatment of 42 patients with advanced colorectal cancer.Methods All the pa- tients were treated with Oxaliplatin(130 mg/m~2,ivgtt for 2 h,d1)combined with XeLoda(2000 mg?m~(-2)?d~(-1), po,bid,d1 to d14).The regime was repeated every 21 days for at least 3 consecutive cycles.Results The to- tal response rate was 40.5%(17/42)in which 2 got CR and 15 PR.24 patients got Kamofsky score increased. The major toxic effects were alopecia,peripheral neuritis,gastrointestinal tract reactions and myelosuppression. Conclusion Oxaliplatin combined with XeLoda regimen is effective in the treatment of advanced colorectal cancer,and its toxicity is tolerable.It is worth studying in the future.