A Monte Carlo simulation algorithm of polymer was proposed, which was similar to the cooperative motion algorithm in literatures. In this algorithm several segments of the polymer can move cooperatively, this may be i...A Monte Carlo simulation algorithm of polymer was proposed, which was similar to the cooperative motion algorithm in literatures. In this algorithm several segments of the polymer can move cooperatively, this may be interpreted as the effect of tensile force in the polymer chain. Its dynamic behavior is in agreement with the Rouse theory, so it can be used as a dynamic Monte Carlo simulation algorithm.展开更多
目的探讨类固醇5α-还原酶2型缺乏症(SRD5A2)的临床特点、基因突变特征。方法回顾分析1例以外阴异常为初诊表现的SRD5A2患儿的临床资料。结果患儿,2岁5个月,社会性别为女性。基础促黄体生成素(LH)0.07 m IU/mL、促卵泡激素(FSH)0.39 m I...目的探讨类固醇5α-还原酶2型缺乏症(SRD5A2)的临床特点、基因突变特征。方法回顾分析1例以外阴异常为初诊表现的SRD5A2患儿的临床资料。结果患儿,2岁5个月,社会性别为女性。基础促黄体生成素(LH)0.07 m IU/mL、促卵泡激素(FSH)0.39 m IU/mL;人绒毛膜促性腺激素(HCG)刺激试验前后,睾酮分别是0.06 ng/mL、3.65ng/mL,双氢睾酮(DHT)分别是19.67 pg/mL、68.25 pg/mL;17-羟孕酮(17-OHP)1.20 ng/mL,雄烯二酮(A 2)0.07 ng/mL;HCG试验后T/DHT为51.72、T/A 2为14.70;抗苗勒管激素(AMH)22.97 ng/mL,抑制素B(INH-B)274.4 pg/mL。盆腔超声和磁共振均未探及子宫及卵巢。染色体为46,XY;性别决定(SRY)基因检测无异常;雄激素受体(AR)基因结果阴性。患儿及父母外周血均检测到2型5α-还原酶(SRD5A2)基因的致病性突变。应用2.5%DHT凝胶涂抹阴茎4个月后阴茎增长2 cm。结论 SRD5A2的诊断以HCG试验后T/DHT增高为主要依据,检测到致病性的SRD5A2基因突变可确诊。展开更多
Electromotive force measurements of the cell, Na-ISE|polyelectrolyte( m p(mono) ),NaCl( m a)|AgCl,Ag,are carried out at the different molalities of NaCl in aqueous poly(diallydimethylammonium chloride)(PDADMAC)and pol...Electromotive force measurements of the cell, Na-ISE|polyelectrolyte( m p(mono) ),NaCl( m a)|AgCl,Ag,are carried out at the different molalities of NaCl in aqueous poly(diallydimethylammonium chloride)(PDADMAC)and poly(anetholesulfonic acid, sodium salt)(PAS) solutions at 308.15 K. The mean activity coefficients of NaCl in aqueous polyelectrolyte solutions are determined by using the standard cell potential which are obtained from the measurements of the electromotive force of cell,Na-ISE| NaCl( m )|AgCl, Ag, combining with the Pitzer model for electrolyte solution.At different concentrations of PDADMAC solution, the mean activity coefficients of NaCl decrease monotonically as the concentrations of NaCl increase.However, for the aqueous solutions of PAS, there is a maximum value as the concentrations of NaCl increase.展开更多
文摘A Monte Carlo simulation algorithm of polymer was proposed, which was similar to the cooperative motion algorithm in literatures. In this algorithm several segments of the polymer can move cooperatively, this may be interpreted as the effect of tensile force in the polymer chain. Its dynamic behavior is in agreement with the Rouse theory, so it can be used as a dynamic Monte Carlo simulation algorithm.
文摘Electromotive force measurements of the cell, Na-ISE|polyelectrolyte( m p(mono) ),NaCl( m a)|AgCl,Ag,are carried out at the different molalities of NaCl in aqueous poly(diallydimethylammonium chloride)(PDADMAC)and poly(anetholesulfonic acid, sodium salt)(PAS) solutions at 308.15 K. The mean activity coefficients of NaCl in aqueous polyelectrolyte solutions are determined by using the standard cell potential which are obtained from the measurements of the electromotive force of cell,Na-ISE| NaCl( m )|AgCl, Ag, combining with the Pitzer model for electrolyte solution.At different concentrations of PDADMAC solution, the mean activity coefficients of NaCl decrease monotonically as the concentrations of NaCl increase.However, for the aqueous solutions of PAS, there is a maximum value as the concentrations of NaCl increase.
