AIM:To study frequency of blood groups,prevalence of sickle-cell anemia trait and glucose-6-phosphate dehydrogenase deficiency(G6PD),among consanguineous Yansi tribe.METHODS:A total of 525 blood samples were collected...AIM:To study frequency of blood groups,prevalence of sickle-cell anemia trait and glucose-6-phosphate dehydrogenase deficiency(G6PD),among consanguineous Yansi tribe.METHODS:A total of 525 blood samples were collected,of which 256 among the Yansi population,and269 for the unrelated control group in the Bandunduprovince of Democratic Republic of Congo.Blood group antigens were determined in the following systems:ABO,Rh,Kell,Duffy,Kidd and MNS.Blood grouping and extended phenotype tests were performed according to standard immunohematological procedures.Spot tests and tandem mass spectrometry were used respectively for the assessment of G6PD and sickle-cell anemia trait.RESULTS:The frequency of ABO phenotypes conformed to the following order O>A>B>AB with notably 62.5%,23.8%,12.1%and 1.6%for the Yansi,and 54.6%,27.5%,14.1%and 3.7%for the unrelated control group,respectively(P=0.19).As for the Rh phenotypes,the most frequent were cc D.ee,cc D.Ee,Cc D.ee,corresponding to 71.5%,12.1%and 12.1%for the Yansi,and 70.6%,15.6%and 8.2%,for the unrelated control group(P=0.27).The frequency of MN and Ss phenotypes were statistically different between groups(P=0.0021 and P=0.0006).G6PD was observed in 11.3%of subjects in the Yansi group,and in 12.4%of controls(P=0.74).The sickle-cell anemia trait was present in 22.4%of Yansi subjects and 17.8%in the control group(P=0.24).Miscarriages and deaths in young age were more common among Yansi people.CONCLUSION:This study shows a significant difference in MNS blood group distribution between the Yansi tribe and a control population.The distribution of other blood groups and the prevalence of hemoglobinopathies did not differ in the Yansi tribe.展开更多
This short essay discusses the conditions—and the general contours—of a viable ontology assigning a place to meaning in the architecture of the sorts of reality we acknowledge in the framework of a non-reductive rea...This short essay discusses the conditions—and the general contours—of a viable ontology assigning a place to meaning in the architecture of the sorts of reality we acknowledge in the framework of a non-reductive realist philosophy(John Searle^1, Barry Smith^2) compatible with both cognitive and semiotic approaches to the human world.展开更多
Four nano heteropolymolybdovanadoarsenics were synthesized by solidstate reaction at room temperature.Their general molecular formulas are H3MAsMo10V2O40·xH2O(M=Co2+,Ni2+,Cu2+,Zn2+).The catalytic behaviour of the...Four nano heteropolymolybdovanadoarsenics were synthesized by solidstate reaction at room temperature.Their general molecular formulas are H3MAsMo10V2O40·xH2O(M=Co2+,Ni2+,Cu2+,Zn2+).The catalytic behaviour of the nano heteropoly compound for hydroxylation of benzene to phenol with H2O2 and the reaction parameters were studied in detail.The experimental results showed that the yield of phenol was over 50% and the selectivity for phenol was over 98% under the optimum conditions with the H2O2/C6H6 molar ratios of 2.0,C6H6/catalyst（mass ratios）of 23,reaction time of 2.5h,and temperature of 70℃.The four nano catalysts had high activity for the hydroxylation of benzene to phenol.展开更多
文摘AIM:To study frequency of blood groups,prevalence of sickle-cell anemia trait and glucose-6-phosphate dehydrogenase deficiency(G6PD),among consanguineous Yansi tribe.METHODS:A total of 525 blood samples were collected,of which 256 among the Yansi population,and269 for the unrelated control group in the Bandunduprovince of Democratic Republic of Congo.Blood group antigens were determined in the following systems:ABO,Rh,Kell,Duffy,Kidd and MNS.Blood grouping and extended phenotype tests were performed according to standard immunohematological procedures.Spot tests and tandem mass spectrometry were used respectively for the assessment of G6PD and sickle-cell anemia trait.RESULTS:The frequency of ABO phenotypes conformed to the following order O>A>B>AB with notably 62.5%,23.8%,12.1%and 1.6%for the Yansi,and 54.6%,27.5%,14.1%and 3.7%for the unrelated control group,respectively(P=0.19).As for the Rh phenotypes,the most frequent were cc D.ee,cc D.Ee,Cc D.ee,corresponding to 71.5%,12.1%and 12.1%for the Yansi,and 70.6%,15.6%and 8.2%,for the unrelated control group(P=0.27).The frequency of MN and Ss phenotypes were statistically different between groups(P=0.0021 and P=0.0006).G6PD was observed in 11.3%of subjects in the Yansi group,and in 12.4%of controls(P=0.74).The sickle-cell anemia trait was present in 22.4%of Yansi subjects and 17.8%in the control group(P=0.24).Miscarriages and deaths in young age were more common among Yansi people.CONCLUSION:This study shows a significant difference in MNS blood group distribution between the Yansi tribe and a control population.The distribution of other blood groups and the prevalence of hemoglobinopathies did not differ in the Yansi tribe.
文摘This short essay discusses the conditions—and the general contours—of a viable ontology assigning a place to meaning in the architecture of the sorts of reality we acknowledge in the framework of a non-reductive realist philosophy(John Searle^1, Barry Smith^2) compatible with both cognitive and semiotic approaches to the human world.
文摘Four nano heteropolymolybdovanadoarsenics were synthesized by solidstate reaction at room temperature.Their general molecular formulas are H3MAsMo10V2O40·xH2O(M=Co2+,Ni2+,Cu2+,Zn2+).The catalytic behaviour of the nano heteropoly compound for hydroxylation of benzene to phenol with H2O2 and the reaction parameters were studied in detail.The experimental results showed that the yield of phenol was over 50% and the selectivity for phenol was over 98% under the optimum conditions with the H2O2/C6H6 molar ratios of 2.0,C6H6/catalyst（mass ratios）of 23,reaction time of 2.5h,and temperature of 70℃.The four nano catalysts had high activity for the hydroxylation of benzene to phenol.
