Objective To investigate the clinical significance of the detection of food-specific IgE(fsIgE)and IgG4(fsIgG4)antibod-ies in the diagnosis and treatment of children's allergic diseases.Methods A total of 641 children with allergic diseases visited Hang-zhou Women's Hospital during November 2022 and November 2023 and 100 healthy children during the same period were selected,and the levels of fsIgE and fsIgG4 in their serum samples were detected.Results The total positive rates of fsIgE and fsIgG4 in children with allergic diseases were 37.44%and 90.48%,respectively,which were significantly higher than the 11.00%and 61.00%of healthy children(P＜0.05).The main food allergens in children were milk and eggs.The intensity of fsIgE was concentrated in the 1-2 level and the positive result for a single food was more common.The intensity of fsIgG4 was concentrated in Grade 3 and the positive results for multiple foods were more common.The comparison of the detection results of sIgE and sIgG4 to the same food showed that the posi-tive rate of sIgG4 was significantly higher than that of sIgE(P＜0.05),and the consistency between them was poor(κ＜0.4).There were no significant differences in the positive rates of fsIgE and fsIgG4 between different genders(P＞0.05).The highest positive rate of fsIgE was seen in the infant group and the highest positive rate of fsIgG4 was seen in the childhood group(P＜0.05).The positive rates of sIgE to egg protein,shrimp,crab,and cashew were mainly seen in children with skin diseases(P＜0.05).The positive rates of sIgG4 to egg and milk were mainly seen in children with respiratory diseases(P＜0.05).The positive rates of sIgG4 to shrimp and wheat were mainly seen in children with skin diseases(P＜0.05).Analysis of allergen components showed that the β-lactoglobulin,α-whey protein,and casein in milk and mucin in eggs were important allergenic components.Conclusion Food allergy is an important factor leading to children's allergic diseases.The combined detection of fsIgE and fsIgG4 can provide experimental basis for clinical di-agnosis and treatment as well as personalized dietary guidance of children.

OBJECTIVETo explore the characteristics of inorganic elements in Erodium stephanianum.

METHODThe content of elements such as Li, B, Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, Br, Rb, Sr, Ba, La, Ce and Rb in ten E. stephanianum samples were determined by means of ICP/MS. The results were used for the development of element distribution diagram. The principal component analysis of SPSS and Q-type cluster analysis were applied for the study of characteristic elements in E. stephanianum.

RESULTFive principal components which accounted for over 91% of the total variance were extracted from the original data. The analysis results showed that Al, Ti, V, Fe, La, Ce, Li, Ga and Ba may be the characteristic elements in E. stephanianum; The results of Q-type cluster analysis showed that the samples could be clustered reasonably into two groups, and the elemental distribution characteristics were related to the ecology and origins of E. stephanianum.

CONCLUSIONThe principal component analysis and Q-type cluster analysis could be used in data processing in inorganic elements.

China ; Geraniaceae ; chemistry ; classification ; Plant Extracts ; analysis ; Principal Component Analysis ; Quality Control ; Trace Elements ; analysis