To explore the feasibility, safety and effect of the full-thickness lamellar keratoplasty for the treatment of pseudomonas aeruginosa corneal ulcer.METHODS: Based on a retrospective non-controlled study, 25 patients were given the full-thickness lamellar keratoplasty for clinical diagnosis of pseudomonas aeruginosa infection and corneal ulcer medication conventional anti-gram-negative bacteria. Routine follow-up were carried out at postoperative 1wk; 1, 3, 6, 12, 18mo to observe the situation of corneal epithelial healing, recurrent infection, immune rejection, graft transparency and best corrected visual acuity, etc. At the 6 and 12mo postoperative, corneal endothelial cell density was reexamined. RESULTS: No patients because of Descemet's membrane rupture underwent penetrating keratoplasty surgery: One only in cases of bacterial infection after 1mo, once again did not cultivate a culture of bacteria pseudomonas aeruginosa, and the remaining 24 cases average follow - up 14 ± 6mo, corneal graft were transparent, the cure rate was 96%. At the sixth month after surgery, there were 16 cases of eye surgery best corrected visual acuity ≥4. 5, of which 3 cases ≥4. 8. At the sixth month after surgery, the average corneal endothelial cell density 2 425 ± 278/mm2; At 12mo postoperatively, it was 2257± 326/mm2.CONCLUSlON: Full-thickness lamellar keratoplasty is an effective method of pseudomonas aeruginosa infection in the treatment of corneal ulcers, corneal drying material glycerol can be achieved by visual effects.

To study ecology suitability rank dividing of the total alkaloid content of Coptis Rhizoma for selecting artificial planting base and high-quality industrial raw material in Chongqing province. Based on the investigation of PCB and DEM data of Chongqing province, the relationship between the total alkaloid content in Coptis Rhizoma and topographical conditions was analyzed by statistical analysis. The geographic information systems (GIS)-based assessment and landscape ecological principles were applied to assess eco logy suitability areas of Coptis Rhizoma in Chongqing. slope, aspect and altitude are main topographical factors that affect the content of the total alkaloid content in Coptis Rhizoma The total alkaloid content in Coptis Rhizoma is higher in the lower altitude, shady slope and bigger slope areas. The total alkaloid content is higher in the south areas of Chongqing province and lower in the northeast. Terrain conditions of the southern region of Chongqing are most suitable for The accumulated of total alkaloid Coptis Rhizoma content.
Alkaloids ; analysis ; metabolism ; China ; Coptis ; chemistry ; Ecology ; Environment ; Geographic Information Systems ; Geography ; Plants, Medicinal ; Rhizome ; chemistry

China ; epidemiology ; Coal Mining ; Humans ; Pneumoconiosis ; epidemiology ; Private Sector ; statistics & numerical data ; Public Sector ; statistics & numerical data ; Retrospective Studies

Hemangioblastoma ; metabolism ; pathology ; surgery ; Humans ; Male ; Middle Aged ; Optic Nerve ; pathology ; Optic Nerve Neoplasms ; metabolism ; pathology ; surgery ; Phosphopyruvate Hydratase ; metabolism ; Vimentin ; metabolism ; von Willebrand Factor ; metabolism

To express feruloyl esterase A from Aspergillus oryzae in Pichia pastoris expression system and study its hydrolysis function, explore the conditions and effects of purification for ferulic acid extracts by macroporos resin. Using the total RNA from A. oryzae CICC 40186 as the template, we amplified coding sequence AorfaeA encoding a mature feruloyl esterase A (AorFaeA) by RT-PCR technique. Then, the coding sequence AorfaeA was successfully expressed in Pichia pastoris GS115 mediated by an expression plasmid pPIC9K. The purified recombinant AorFaeA (reAorFaeA) showed one single band on SDS-PAGE with an apparent molecular weight of 39.0 kDa. The maximum activity of reAorFaeA to methyl ferulate, measured by high-performance liquid chromatography (HPLC), was 58.35 U/mg. Then, reAorFaeA was used to release ferulic acid from de-starched wheat bran in the presence of xylanase. The purification tests for ferulic acid from the enzymatic hydrolysate were carried out with preselected macroporous resins. The results showed that macroporous resin HPD-300 had much higher adsorption and desorption capacities. Ferulic acid could be quantitatively recovered by 50% of the eluent concentration at a flow speed of 1 mL/min. Under the purification condition, the recovery ratio of ferulic acid was 92%, and the content of ferulic acid was increased from 0.13% in the raw material to 10.55%. This work exploits the breakdown of ferulic acid by recombinant enzymeand provids a good strategy to its "green production".
Aspergillus oryzae ; enzymology ; Carboxylic Ester Hydrolases ; biosynthesis ; genetics ; Cloning, Molecular ; Coumaric Acids ; chemistry ; Electrophoresis, Polyacrylamide Gel ; Hydrolysis ; Molecular Weight ; Pichia ; genetics ; metabolism

Adult ; Aged ; Asteraceae ; Drugs, Chinese Herbal ; adverse effects ; Female ; Hepatic Veno-Occlusive Disease ; chemically induced ; Humans ; Male ; Middle Aged ; Retrospective Studies

Objective To study a series of tests to the IMRT planning system RayStation,and verify the feasibility of this Standard.Referring to the standard Performance and test methods for intensity modulated radiation therapy (IMRT) treatment planning system (Standard).Methods Referring to the Standard,the tests include:dose goals used for planning,point dose calculation accuracy and dose distribution calculation accuracy.And test phantoms include:AAPM TG119 report's test cases and solid water phantom for verification,and IMRT test cases include:multitarget,mock prostate,head/neck and CTshape (easier version and harder version) and so on.Referring to the Standard,we optimize and calculate doses of interest in RayStation,and use the common measurement equipments and tools,such as an ionization chamber,films,a detector array,and etc,to measure the doses on the accelerator,then calculate and analyze the errors between them.Results The results of dose goals for five different mock plans meet the requirements of the Standard.And the point dose ionization chamber measurements are in line with the requirements of the Standard,and the total error of the mock plans was (0.83 ± 1.65) ％.The γpass rates of per-field measurements using detector array are all greater than 99.0％,and the γpass rates of composite film measurements are all greater than 92.5％.Conclusions The results of three trials to IMRT performance of RayStation are in full compliance with the requirements of the Standard.And also it is an evidence for the feasibility of this Standard.

Objective To explore the observation and nursing of the surgery of dysembryoplastic neuroepithelial tumors (DNT) in the function zone of brain.Methods A retrospective analysis of the clinic data of 5 patients receiving the surgery for the dysembryoplastic neuroepithelial tumors (DNT) in the function zone of brain was carried out,the clinical nursing experience was summarized.Results The EEG was re-examined 1 week after surgery.4 cases showed roughly normal EEG,one case with rare slow wave.The re-examined EEG 3 months after surgery suggested 3 cases were normal and 2 cases were almost normal.No epilepsia occurred after 6-month follow-up.Conclusions For DNT patients,microsurgical resection of the tumor is effective and enhancing the patients' perioperative observation and nursing has a significant meaning to increase the success of surgery,reduce complications,promote the rehabilitation of patients and improve the quality of life of patients.

Objective To study the applied value of diffusion weighted imaging-DWIBS(diffusion weighted imaging with background suppression) in detecting the body tumour.Methods 10 healthy volunteers and 20 patients with histologically proven tumour were examined by diffusion Weighted MR with different techniques of background/fat body signal suppression.STIR-EPI sequence and spin echo-echo planar imaging(SE-EPI) sequence with chemical shift selective(CHESS) pulse were compared in terms of their degree of fat suppression.The diffusion weighted imaging features of control group and patients with tumour were observed and the values of ADC were measured.Results Fat suppression with STIR-EPI sequence in neck,chest,spine and extremity was well and SE-EPI with CHESS pulse in chest,abdomen,pelvic was satisfying.Signal to noise ratio(SNR) wss higher in SE-EPI with CHESS than that in STIR.The glands,spleen,peripheral nerves,lymph nodes and so forth could be showed by DWIBS in control group.85% malignant lesions were well visualized and appeared as high signal intensity and lower signal intensity in similar PET imaging,but the lesions only in 3 patients are not well visualized including pancreas cancer(1 case),rectum cancer(1 case),prostate cancer(1 case).PET scan was performed in 3 patients and well corresponded with diffusion weighted imaging in 2 cases,the other one was not visualized on diffusion weighted imaging.The highest ADC of malignant tumors was(1.58?2.06)?10-3mm2/s,the lowest ADC of malignant tumors was(0.88?0.74)?10-3mm2/s,the mean values of ADC of malignant tumors was(1.34?0.79)?10-3mm2/s.Conclusion DWIBS is a new method of diffusion-weighted MR,it has high spatial resolution,high contrast to noise ratio(CNR) and high SNR. This technique can be used as a powerful screening tool for tumour and evaluating the pathological lesions by measuring the values of ADC.

AIM:To investigate the changes of visual development produced by monocular atropinization in rats.
METHODS: Twenty normal SD rats were randomly divided into two groups: control group ( n = 10 ) and atropinization ( experimental) group ( n=10 ) . All the left eyes were selected as the experimental eyes, and the right eyes served as the normal eyes. The left eyes in atropinization group was produced by 1% atropine, 3 times a day and the right eyes in control group was treated with normal saline, 3 times a day. The flash visual evoked potentials ( F-VEP ) and retinoscopy refraction of the rats'both eyes were detected at five time points:0, 7, 14, 21, and 28d after atropinization, respectively. After 28d, six rats were randomly selected from both groups and each group had three rats. The expression of the c- fos mRNA was observed in both visual cortexes. Another six rats were chosen for the same test after 2d dark environment with 2h light later. The expression of c-fos mRNA was detected again.
RESULTS: After 14d anisometropia was observed in experimental group, the difference was 3. 9D ( P<
0.0 5 ) , F-VEP P1 wave of the rats left in experimental group was reached to 88. 9±1. 889ms at 21d, there was statistical difference compared with the right eye ( P<0.05). After 28d, c-fos mRNA expression in the left visual cortex of rats in the experimental group was higher than that of the right side, but there was no significant difference. But when underwent 2h light stimulation after in the darkroom 2d, the c-fos mRNA expression in in the left visual cortex of rats in the experimental group was 5 times higher than that of the right side, there was a statistically significant difference (P<0. 05).
CONCLUSION: In the critical period of visual development, monocular chronic atropine in rats can form anisometropia, may delay the transmission of the optic nerve, hinder the normal development of the visual cortex. Monocular atropinization in rats can be used as the model of anisometropia.