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Object To study on the genetic diversity and genetic structure of Iphigenia indica Kunth. Methods Random amplified polymorphic DNA (RAPD) was applied to detect DNA fingerprints of three populations of I. indicafrom Yunnan Province. Results Twenty primers were screened, and a total of 120 DNA fragments were amplified ranging from 0.2-3 kb, among which 71 (59.17%) were polymorphic. The average number of DNA band produced by each primer was 3.55. The Shannon index was (0.199 4) in Ca population, 0.200 7 in Cb population, 0.254 8 in Cc population, respectively; the average value of populations was 0.218 3. The Shannon index was 0.288 6 in species. Nei's genetic identity was 0.930 9 between Ca and Cb, 0.932 7 between Ca and Cc, 0.946 6 between Cb and Cc. G_(st) within population was (0.204 4.) Conclusion For the establishment of protective tactic and measure, and of the standard of good agriculture practice (GAP) growth and heredity breeding, RAPD analysis provides I. indicawith theoretical foundation and basal data.

Blood-brain barrier is a natural protection for human body. It protects central nervous system from the interruption and damage of xenobiotics. However, it prevents potential drugs aimed at central nervous system, thus becomes an obstruction for the development of central nervous system drugs. The recent development of blood-brain barrier permeability research and several lead optimization strategies to improve blood-brain barrier permeability are reviewed. These structure optimization methods include increasing lipophilicity, reducing hydrogen bond doners, simplifying molecule, increasing rigidity, lowering polar surface area, avoiding acid group, prodrug strategy, modifying into active transporter's substrates, as well as avoiding P-glycoprotein recognized structures.
ATP-Binding Cassette, Sub-Family B, Member 1 ; metabolism ; Biological Transport ; Blood-Brain Barrier ; Central Nervous System ; drug effects ; Central Nervous System Agents ; pharmacokinetics ; Drug Design ; Humans ; Permeability ; Xenobiotics ; adverse effects

Blood-brain barrier is a natural protection for human body. It protects central nervous system from the interruption and damage of xenobiotics. However, it prevents potential drugs aimed at central nervous system, thus becomes an obstruction for the development of central nervous system drugs. The recent development of blood-brain barrier permeability research and several lead optimization strategies to improve blood-brain barrier permeability are reviewed. These structure optimization methods include increasing lipophilicity, reducing hydrogen bond doners, simplifying molecule, increasing rigidity, lowering polar surface area, avoiding acid group, prodrug strategy, modifying into active transporter's substrates, as well as avoiding P-glycoprotein recognized structures.

AIM:To evaluate the efficacy and safety of methazolamide in treating refractory uveitic macular edema.METHODS: Retrospective self-controlled study was designed.A total of 15 patients (20 eyes) with refractory uveitic macular edema which used methazolamide as adjuvant therapy were enrolled in Shanghai First People`s Hospital from January 2015 to June 2016.The changes of central macular thickness (CMT) and best corrected visual acuity (BCVA) were observed at baseline and 2, 4, 8wk after treatment.We also focused on the incidence of complications and relapse.RESULTS: The CMT was 445.95±154.10μm, 338.83±138.34μm, 251.50±40.20μm, 244.90±35.68μm at baseline, 2, 4 and 8wk after treatment, respectively.The differences among them were statistically significant (F=15.467, P<0.05).The BCVA (log MAR) were 0.40±0.17, 0.28±0.21, 0.19±0.20, 0.18±0.21 at baseline, 2, 4 and 8wk respectively, with a significant difference among them (F=5.208, P<0.05).When the cumulative dose reached to 700mg and 1400mg, no one had methazolamide-related complications;and when it came to 2800mg, 5 patients (33%) had methazolamide-related complication.After the withdrawal of methazolamide 1wk, 1 and 3mo, 3 patients (20%), 5 patients (33%) and 8 patients (53%) relapsed, respectively.CONCLUSION: Methazolamide is beneficial in improving macular edema and vision in 4wk.When the cumulative dose is more than 1400mg, we need pay attention to the complications.After discontinuing methazolamide for 1wk, macular edema relapsed in some patients, and more than half of patients recurred after 3mo.So the patients should be followed closely in 3mo after withdrawal of methazolamide.

Objective To develop a new multi-purpose face mask for oxygen provision in first aid,which can be used in both war time and peace time.Methods The structure,operating principle and application of a multi-purpose face mask,whose transparent silicone mask body has even the entrance of nested endoscopy and oxygen concentration regulating twist,are introduced in this paper.Results This mask can be used in painless endoscopy and emergent oxygen supply in tracheal intubatton.Conclusion The mask can greatly enhance the safety of painless endoscopy and it can also be used as mask for the use of general anesthesia.

AIM: To discuss the application of overlapping ratio to the fingerprints of plant and plant extract. METHODS: We took the HPLC fingerprints of green tea and tea polyphenols for decision procedure. RESULTS: Overlapping ratio could be applied to selecting representative samples for characteristic fingerprints of green tea and tea polyphenols,and could be used to deduce the raw material,process and producer of tea polyphenols.(CONCLUSION:) Overlapping ratio can be used to choose the suitable samples for establishing the characteristic fingerprint spectrum,and can supply references to relationship investigation among products,raw material and process.

Objective To investigate the function and possible mechanism of acupuncturing “Zusanli” point on the liver cell membrane of rat with chronic alcohol liver injury. Methods Chronic alcoholic liver damage rat model was established by 60% ethanal intragastric infusion for 60 d. Total phosphatide, total cholesterol and phosphatide component were determined. Result Compare with the normal recovery group, acupuncture “Zusanli” point can increase the content of PC and PE, decrease the content of Chol and SM of liver cell, and reduce the membrane aging index C/P, SM /PC. Conclusion Acupuncture “Zusanli” point has the function of protecting the liver cell membranes and improving the liver cell membrane’s fluidity of chronic alcohol liver injury rat.

Objective:To establish a GC method for the determination of residual organic solvents in lidocaine patches. Methods:GC was carried out on a DB-WAX capillary column (30 m × 0. 25 mm, 0. 5 μm). The detector was FID and the carrier gas was He. The initial temperature was 50℃, maintained for 8 min, and then raised to 250℃ with a rate of 50℃ per min. The inlet temperature and the detector temperature were 280℃. The separation was 50 ∶1. Results:The linear range of acetone, ethyl acetate and methanol was 15. 0-600. 0 μg·ml-1. The average recovery was 97. 4% (RSD =3. 2%, n=9), 95. 6% (RSD=1. 9%, n=9) and 112. 0%(RSD =4. 5%, n=9), respectively. Conclusion:The method is simple and accurate,which can be used for the determination of re-sidual organic solvents in lidocaine patches.

OBJECTIVE:To establish a HPLC method for the simultaneous determination of blood drug concentration of acetaminophen and phenacetin.METHODS:Diamonil C 18 was used as the chromatographic column,the mobile phase was methanol-water(45∶55),theophyllinum was used as internal standard,the detection wavelength was254nm and the column temperature was set at the room temperature.RESULTS:The minimum determination concentration of acetaminophen and phenacetin was5?g/ml,the calibration curve was linear in a range from5～25?g/ml;The recovery rate of both acetaminophen and phenacetin in this method was more than95%;both the intraday RSD and the interday RSD were less than4.0%.CONCLUSION:The method is rapid and accurate,which can satisfy the needs of the clinic blood drug concentration deter-mination of paracetamol and phenacetin.