Degraded guar was prepared by acid with guar as the main material, which was then brought into reaction with chlorosulfonic acid under proper conditions, the sulfonated degraded guar was obtained successfully. The effects of sulfonation conditions on the SO4(2-) content were investigated, and the proper reaction conditions were determined. The results of infrared spectrometry showed that this sulfated derivative is a novel heparin-like polysaccharide. At the same time, the selective removal of low density lipoprotein (LDL) and fibrinogen (Fib) by degraded guar gum sulfate was studied. The experimental results showed that degraded guar gum sulfate is a novel LDL/ Fib purifying agent. When pH= 5.15 and the initial concentration of the degraded guar gum sulfate is 2500 mg/L, the reduction percentages were about 60%-66% for total cholesterol, about 76%-89% for LDL and very low-density lipoproteins (VLDL), and almost 100% for fibrinogen. There were no significant changes regarding the level of high-density lipoproteins and total proteins.
Fibrinogen ; analysis ; isolation & purification ; Galactans ; chemistry ; Hyperlipidemias ; blood ; Lipoproteins, LDL ; blood ; isolation & purification ; Mannans ; chemistry ; Plant Gums ; chemistry ; Sulfates ; chemistry

A biodegradable modified guar gum microsphere was prepared for the first time by ionic gelation of the guar gum derivative containing quarternary ammonium group with tripolyphosphate at room temperature in the absence of emulsifying agent or organic solvent. Its average particle diameter was about 140 microm and the particle size had a narrow and normal gauss distribution. From the loading experiment of bovine serum album (BSA) with various concentrations, it was found that the encapsulation efficiency is more than 80%. By the investigation of in vitro release from the BSA-loaded microsphere, it was found that the BSA had a continuous release for more than 6 hours and the release percentage was affected by the initial concentration of the BSA and temperature.
Biocompatible Materials ; chemistry ; Drug Carriers ; chemistry ; Drug Delivery Systems ; Galactans ; chemistry ; Mannans ; chemistry ; Microspheres ; Plant Gums ; chemistry ; Proteins ; administration & dosage ; Serum Albumin, Bovine ; administration & dosage

The aim of this work was to investigate guar gum/ethylcellulose mix coated pellets for potential colon-specific drug delivery. The coated pellets, containing 5-fluorouracil as a model drug, were prepared in a fluidized bed coater by spraying the aqueous/ethanol dispersion mixture of guar gum and ethylcellulose. The lag time of drug release and release rate were adjustable by changing the ratio of guar gum to ethylcellulose and coat weight gain. In order to find the optimal coating formulation that was able to achieve drug targeting to the colon, the effect of two independent variables (the ratio of guar gum to ethylcellulose and the coat weight gain) on drug release characteristics was studied using 3 x 4 factorial design and response surface methodology. Results indicated that drug release rate decreased as the proportion of ethylcellulose in the hybrid coat and the coat weight gain increased. When the ratio of guar gum to ethylcellulose was kept in the range of 0.2 to 0.7, and the coat weight gain in the range of 250% to 500%, the coated pellets can keep intact for about 5 h in upper gastrointestine and achieve colon-specific drug delivery. The pellets prepared under optimal conditions resulted in delayed-release sigmoidal patterns with T(5%) (time for 5% drug release) of 5.1 - 7.8 h and T(90%) (time for 90% drug release) of 9.8 - 16.3 h. Further more, drug release was accelerated and T(90%) of the optimum formulation pellets decreased to 9.0 - 14.5 h in pH 6.5 phosphate buffer with hydrolase. It is concluded that mixed coating of guar gum and ethylcellulose is able to provide protection of the drug load in the upper gastrointestinal tract, while allowing enzymatic breakdown of the hybrid coat to release the drug load in the colon.
Cellulose ; administration & dosage ; analogs & derivatives ; Colon ; metabolism ; Drug Delivery Systems ; Fluorouracil ; administration & dosage ; chemistry ; Galactans ; administration & dosage ; Mannans ; administration & dosage ; Plant Gums ; administration & dosage

OBJECTIVEThe study is the research on the preparation of arabinogalactan (AG) dropping pills and the releasing mechanism.

METHODUse the orthogonal test to find out the best way to produce and advance the preparation of AG dropping pills, analysis according to the chart and DSC to find the releasing mechanism.

RESULTThe best preparation conditions are: the liquid of AG is at 75 degrees C, the temperature above the polydimethls iloxane is 30 degrees C, the distance to the frizzed liquid is 6 cm, the speed of the liquid is 30 drop x min(-1). The chart and DSC suggest: The solid disoperation of AG-PREG 4000 the complex is in a certain form which made the melting point decreased obviously, so as to increase the solution of the medicine in carrier to increase the releasing speed.

CONCLUSIONThe best preparation is reasonable, AG and carrier become a form, the melting point is low, it can release fast.

Dimethylpolysiloxanes ; Drug Carriers ; Drugs, Chinese Herbal ; administration & dosage ; isolation & purification ; Galactans ; administration & dosage ; isolation & purification ; Larix ; chemistry ; Plants, Medicinal ; chemistry ; Polyethylene Glycols ; Solubility ; Technology, Pharmaceutical ; methods ; Temperature

The present investigation is aimed to develop a new formulation containing chemically crosslinked guar gum microspheres loaded with 5-fluorouracil for targeting colorectal cancer. The emulsification polymerization method involving the dispersion of aqueous phase of guar gum in castor oil was used to prepare spherical microspheres. Various processing parameters were studied in order to optimize the formulation. Particle size and surface morphology of the microspheres were determined using optical microscopy and scanning electron microscopy. The in vitro drug release studies performed in simulated gastric fluid (SGF) for 2 h followed by intestinal fluid for 3 h, revealed the retention of the drug inside the microspheres from which only (15.27 +/- 0.56) % of the drug was released in 5 h. In vitro release rate studies were also carried out in simulated colonic fluid (SCF) in the presence of rat caecal contents, which showed improved drug release. The drug release from the formulation was found to be (41.6 +/- 3.5) % with 2% (w/v) caecal matter in 24 h as compared to control study where (25.2 +/- 3.5) % of drug was released. The drug release from the formulation with 2% and 4% rat caecal contents medium after 2 days of enzyme induction was found to be (56.3 +/- 4.1) % and (78.9 +/- 2.8) % in 24 h respectively. Similarly, (61.3 +/- 5.4) % and (90.2 +/- 2.9) % drug was released respectively with 2% and 4% rat caecal matter after 4 days of enzyme induction and (72.1 +/- 2.9) % and (90.2 +/- 3.2) % after 6 days of enzyme induction. In this way, 5-fluorouracil loaded guar gum microspheres have shown promising results in the management of colorectal cancer, warranting thorough in vivo study for scale up technology.
Animals ; Antimetabolites, Antineoplastic ; administration & dosage ; pharmacokinetics ; Cecum ; metabolism ; Colon ; metabolism ; Drug Carriers ; Drug Compounding ; Drug Delivery Systems ; Fluorouracil ; administration & dosage ; pharmacokinetics ; Galactans ; chemistry ; Mannans ; chemistry ; Microspheres ; Particle Size ; Plant Gums ; chemistry ; Rats

OBJECTIVETo study the therapeutic efficacy of total nutrition admixture (TNA) containing 30.6% BCAA, MCT/LCT, glucose, vitamin, electrolytes in rat with acute hepatic failure (AHF).

METHOD30 Wistar rats were randomly divided into 4 groups: Normal control, AHF control, Fat-free nutrient admixture group, TNA group. AHF model was induced by D-galactosamine Liver and renal function, nitrogen balance, plasma total protein, albumin, prealbumin, fibronectin, hemoglobin, aminogram, tumor necrosis factor, lymphocyte transformation rate, glucose, blood fat tests etc were determined.

RESULTSThe improvement of liver and renal function was better in TNA group than those in other groups. ALT ALP TBil BUN were lower in TNA group than those in other groups. TP, ALB, PA, N-balance in TNA group were significantly higher than those in other groups. The spectrum of plasma amino acids of the TNA group was close to the normal and the control group. The TNF in TNA group were significantly higher than that in Fat-free nutrient admixture group. The stimulation index in TNA group was significantly higher than that in other groups. The difference of triglyceride in TNA group and normal diet was statistically significant, The difference of cholesterol in TNA group and Fat-free nutrient admixture was statistically significant, The difference of lipid peroxidation in four groups was not statistically significant.

CONCLUSIONNutritional supportive treatment is necessary for AHF.

Analysis of Variance ; Animals ; Biomarkers ; blood ; Disease Models, Animal ; Drug Combinations ; Fat Emulsions, Intravenous ; chemistry ; pharmacology ; therapeutic use ; Galactans ; Lipids ; analysis ; blood ; Liver ; drug effects ; metabolism ; Liver Failure, Acute ; chemically induced ; metabolism ; therapy ; Liver Function Tests ; Male ; Nitrogen ; metabolism ; Parenteral Nutrition, Total ; Random Allocation ; Rats ; Rats, Wistar

The short time antibacterial effect of tetracaine hydrochloride was studied. S. aureus, Coagulase Negative Staphylococcus and P. aeruginosa were each incubated with tetracaine hydrochloride(preservative free) for 18 hours or for 2 minutes and then diluted and cultured on nutrient agar plate. Colony counts were done after 18 hours. In cases of 18 hours incubation, there was no growth of microbials in 0.5%, 0.1% tetracaine hydrochloride, but there was no inhibitory effect of 0.02% of tetracaine hydrochloride on growth of microbials, irrespective of inoculum amount. In cases of 2 minutes incubation with 0.5% tetracaine hydrochloride, there was no difference between the amount of microbial inoculum and colony count. Above in vitro study indicates that tetracaine hydrochloride has no inhibitory effect on bacterial growth in short time exposure less than 2 minutes.
Agar ; Coagulase ; Staphylococcus ; Tetracaine*

The short time antibacterial effect of tetracaine hydrochloride was studied. S. aureus, Coagulase Negative Staphylococcus and P. aeruginosa were each incubated with tetracaine hydrochloride(preservative free) for 18 hours or for 2 minutes and then diluted and cultured on nutrient agar plate. Colony counts were done after 18 hours. In cases of 18 hours incubation, there was no growth of microbials in 0.5%, 0.1% tetracaine hydrochloride, but there was no inhibitory effect of 0.02% of tetracaine hydrochloride on growth of microbials, irrespective of inoculum amount. In cases of 2 minutes incubation with 0.5% tetracaine hydrochloride, there was no difference between the amount of microbial inoculum and colony count. Above in vitro study indicates that tetracaine hydrochloride has no inhibitory effect on bacterial growth in short time exposure less than 2 minutes.
Agar ; Coagulase ; Staphylococcus ; Tetracaine*

KOH examination is a simple, rapid and diagnostic procedure to confirm dermatophytic infections. It is important to select a proper examination site of the lesion. To determinate the proper examination site of the lesion, mycologic studies were done with multiple specimens collected from the center, margin and out of margin of the ring-shaped dermatophytic skin lesion on the 58 patients. The results were as follows. Positive rate of KOH wet smear was 94.8% at the center and 100% at the margin of the lesions, 22.4% at the 1 cm and 5.2% at the 2 cm out of the lesions. The more hyphae were found in the lesion, the more hyphae were found out of the lesion. Culture was done on the Sabouraud's glucose agar from the highest KOH positive area and the positive culture was 48 strains (82.8%) of 58 patients. These findings suggested that the ring-shaped active margin was the best site to examine mycologic studies.
Agar ; Glucose ; Humans ; Hyphae ; Skin*

BACKGROUND: The aim of this study is to evaluate the effectiveness of automated ozonated water endoscopic reprocessing system (AORS). MATERIALS AND METHODS: Thirty cases were collected and randomly assigned to 3 groups according to the disinfection methods (Group A, AORS for 5 minutes; Group B, AORS for 10 minutes; Group C, automated disinfection with superoxidized water for 3 minutes 30 seconds). After disinfection was finished, samples were collected from the tip of scopes (Site 1, S1) and rinsing water through biopsy channel (Site 2, S2). Samples were inoculated in blood agar plate for 48 hrs, and then colony count was evaluated. RESULTS: Culture positive rate of S1 was 0% in all three groups. Culture positive rates of S2 were 70% (7/10), 70% (7/10) and 90% (9/10) in group A, group B and group C, respectively. High culture rate group (> or = 1 CFU/ml rinsing water) was 0% (0/10), 30% (3/10) and 70% (7/10) in group A, group B and group C, respectively. Disinfection efficacy between group A and C showed a significant difference in high culture rate (P<0.05). CONCLUSIONS: AORS for 5min was at least equally effective in endoscopic reprocessing compared with the conventional superoxidized water system.
Agar ; Biopsy ; Disinfection* ; Endoscopes ; Water*