Using a synthetic method designed and installed with computer monitor on line, the solubility values of melamine in water were determined and were in good agreement with traditional analytic method data. The solubilit...Using a synthetic method designed and installed with computer monitor on line, the solubility values of melamine in water were determined and were in good agreement with traditional analytic method data. The solubilities of melamine in alcohol and dimethyl sulfoxide were also determined with this method. The experimental data were correlated with Apelblat equation.展开更多
By using laser monitoring technique,the solubilities of p -toluic acid in N -methyl-2-pyrrolidone, N,N -dimethylformamide, N,N -dimethylacetamide,chloroform,acetic acid and water are measured in larger temperature int...By using laser monitoring technique,the solubilities of p -toluic acid in N -methyl-2-pyrrolidone, N,N -dimethylformamide, N,N -dimethylacetamide,chloroform,acetic acid and water are measured in larger temperature intervals by synthetic method.As to the solubility of p -toluic acid in water,the experimental and literature data have satisfactory consistency.Given the solubilities of p -toluic acid, a solubility model is proposed. This model is verified by experimental and literature data, and the solubilities calculated by the model show good agreement with experimental and literature data.展开更多
Ferulic acid was obtained from rice hull with the microwave-assisted extraction method.The solubility data of trans-ferulic acid in 8 binary systems of water and organic solvents,such as methyl acetate,ethyl acetate,b...Ferulic acid was obtained from rice hull with the microwave-assisted extraction method.The solubility data of trans-ferulic acid in 8 binary systems of water and organic solvents,such as methyl acetate,ethyl acetate,butyl acetate,methanol,ethanol,dichloromethane and chloroform were measured from 273.15 K to 333.15 K.The empirical equation was adopted,and the solubilities calculated by the model were in good agreement with experimental data.展开更多
By using a laser monitoring technique,the solubilities of catechol in water, ethyl acetate, butyl acetate and 4-methyl-2-pentanone were determined by the synthesis method.A simplified equation was proposed to correlat...By using a laser monitoring technique,the solubilities of catechol in water, ethyl acetate, butyl acetate and 4-methyl-2-pentanone were determined by the synthesis method.A simplified equation was proposed to correlate the experimental data, and the solubility values calculated by the correlation equation showed good agreement with the experimental values.展开更多
Perfusion of individual tissues is a basic physiological process that is necessary to sustain oxygenation and nutrition at a cellular level. Ischemia, or the insuff iciency of perfusion, is a common mechanism for tiss...Perfusion of individual tissues is a basic physiological process that is necessary to sustain oxygenation and nutrition at a cellular level. Ischemia, or the insuff iciency of perfusion, is a common mechanism for tissue death or degeneration, and at a lower threshold, a mechanism for the generation of sensory signalling including pain. It is of considerable interest to study perfusion of pe- ripheral abdominal tissues in a variety of circumstances. Microvascular disease of the abdominal organs has been implicated in the pathogenesis of a variety of disorders, including peptic ulcer disease, inflammatory bowel disease and chest pain. The basic principle of laser Doppler perfusion monitoring (LDPM) is to analyze changes in the spectrum of light reflected from tissues as a response to a beam of monochromatic laser light emitted. It reflects the total local microcirculatory blood perfusion, including perfusion in capillaries, arterioles, venules and shunts. During the last 20-25 years, numerous studies have been performed in different parts of the gastroin-testinal (GI) tract using LDPM. In recent years we have developed a multi-modal catheter device which includes a laser Doppler probe, with the intent primarily to investigate patients suffering from functional chest pain of presumed oesophageal origin. Preliminary studies show the feasibility of incorporating LDPM into such catheters for performing physiological studies in the GI tract. LDPM has emerged as a research and clinical tool in preference to other methods; but, it is important to be aware of its limitations and account for them when reporting results.展开更多
文摘Using a synthetic method designed and installed with computer monitor on line, the solubility values of melamine in water were determined and were in good agreement with traditional analytic method data. The solubilities of melamine in alcohol and dimethyl sulfoxide were also determined with this method. The experimental data were correlated with Apelblat equation.
文摘By using laser monitoring technique,the solubilities of p -toluic acid in N -methyl-2-pyrrolidone, N,N -dimethylformamide, N,N -dimethylacetamide,chloroform,acetic acid and water are measured in larger temperature intervals by synthetic method.As to the solubility of p -toluic acid in water,the experimental and literature data have satisfactory consistency.Given the solubilities of p -toluic acid, a solubility model is proposed. This model is verified by experimental and literature data, and the solubilities calculated by the model show good agreement with experimental and literature data.
文摘Ferulic acid was obtained from rice hull with the microwave-assisted extraction method.The solubility data of trans-ferulic acid in 8 binary systems of water and organic solvents,such as methyl acetate,ethyl acetate,butyl acetate,methanol,ethanol,dichloromethane and chloroform were measured from 273.15 K to 333.15 K.The empirical equation was adopted,and the solubilities calculated by the model were in good agreement with experimental data.
文摘By using a laser monitoring technique,the solubilities of catechol in water, ethyl acetate, butyl acetate and 4-methyl-2-pentanone were determined by the synthesis method.A simplified equation was proposed to correlate the experimental data, and the solubility values calculated by the correlation equation showed good agreement with the experimental values.
文摘Perfusion of individual tissues is a basic physiological process that is necessary to sustain oxygenation and nutrition at a cellular level. Ischemia, or the insuff iciency of perfusion, is a common mechanism for tissue death or degeneration, and at a lower threshold, a mechanism for the generation of sensory signalling including pain. It is of considerable interest to study perfusion of pe- ripheral abdominal tissues in a variety of circumstances. Microvascular disease of the abdominal organs has been implicated in the pathogenesis of a variety of disorders, including peptic ulcer disease, inflammatory bowel disease and chest pain. The basic principle of laser Doppler perfusion monitoring (LDPM) is to analyze changes in the spectrum of light reflected from tissues as a response to a beam of monochromatic laser light emitted. It reflects the total local microcirculatory blood perfusion, including perfusion in capillaries, arterioles, venules and shunts. During the last 20-25 years, numerous studies have been performed in different parts of the gastroin-testinal (GI) tract using LDPM. In recent years we have developed a multi-modal catheter device which includes a laser Doppler probe, with the intent primarily to investigate patients suffering from functional chest pain of presumed oesophageal origin. Preliminary studies show the feasibility of incorporating LDPM into such catheters for performing physiological studies in the GI tract. LDPM has emerged as a research and clinical tool in preference to other methods; but, it is important to be aware of its limitations and account for them when reporting results.
