Objective:To investigate the effectiveness of familiar pigmented dermatosis on face which treated with YQ400A/B-I Laser. Methods:Pigmented dermatosis were selected to be treated with YQ400A/B-I Laser. Retrospect 479 cases witch been reviewed during 6 months or 2 years in total 568 patients. Results:A total of 479 cases were treated with the therapy,yielding effective rate of 100% in fleck (273 cases),100% in CAL(23 cases),90.20% in age pigment(51 cases). 76.12% in chloasma(67 cases)and 98.46% in congenital melanocytic nevus (65 cases)with no obvious complications. Conclusion:YQ400A/B-I Laser has been proved to be an effective and satisfactory way to treat pigmented dermatosis.

A novel 2-( 2’-hydroxy-5’-chlorophenyl )-6-chloro-4 ( 3 H )-quinazolinone ( ELF-97 )-based fluorescent probe (P1) for hydrogen peroxide was prepared from 5-chlorosalicylaldehyde, 4-(bromomethyl) phenylboronic acid and 2-amino-5-chlorobenzamide, and its structure was characterized by 1 H NMR, 13 C NMR and HRMS. Weak fluorescence intensity was observed at 425nm when the solution of probe P1 was excited by 360 nm UV light. After addition of H2 O2 , however, emission peak at 425 nm disappeared while strong peak emission at 515 nm appeared with the same excitation wavelength ( 360 nm ) . The fluorescence intensity at 515 nm was dependent on the concentration of H2 O2 in the linear response range of 5-45 μmol/L. The detection limit of H2O2 was 0. 1 μmol/L (S/N=3) and the recovery rates of added H2O2 in milk were in the range of 94 . 0%-106 . 0%. Probe P1 was potential to become a useful tool for rapid detection of hydrogen peroxide.

【Objective】 To research the genetic polymorphism of HPA 1-6/10/15/21 in platelet donors in Zhongshan area, and establish a gene bank of platelet donors with HPA locus. 【Methods】 The HPA 1-6/10/15/21 system genotyping was performed by Real time fluorescent PCR combined with TaqMan probe technology on 192 platelet donors in Zhongshan area, and the genotype frequency and gene frequency were calculated. 【Results】 Only HPA-aa genotype was found within HPA-4/10, and no allele HPA-b had been detected. The majority of HPA-1, 2, 5, 6 and 21 genotypes were aa. HPA-3 and HPA-15 showed high heterozygosity, with genotype frequency of 0.307 3, 0.494 8 and 0.197 9 for HPA- 3aa, HPA-3ab and HPA-3bb, while 0.270 8, 0.505 2 and, 0.224 0 for HPA -15aa, HPA-15ab and HPA-15bb, respectively. 【Conclusion】 The distribution characteristics of HPA 1-6 /10/15/21 of platelet donors in Zhongshan shows regional differences compared with similar researches from other regions. The establishment of HPA gene bank is helpful to avoid alloimmunization caused by incompatible platelet transfusion.