Breast milks of 42 mothers who are nursing their babies two to three m-onths old, including 30 subjects living in Guangzhou city and 12 subjects living in the township in rural are analysed. All of the nursing mothers are healthy with an economic situation of fair or well class, their dietary nutrient intakes basically near to the level of RDA which was set by the Chinese Society of Nutrition. The amino acids content of their milk is very near to the comprehensive figures from Hambreaus. The amino acid content for colostrum of the same mother is about 1.9 times against the mature milk analysed. The results are disscussed.

This study was based on the results of the writer's previous investigations on the energy requirement of 5 years old preschoolers, including the measurement of body surface, the basal metabolism and the expenditure of variety of daily activities in kindergarten. For verification of the energy needs of this age, a futher study on 9 groups of children aged 5 in South China was conducted. The general living patterns of children under subtropic were about 12 hours for sleep and lying in bed, 8 hours for daytime activities and 4 hours for meal, personal hygiene and other activities. In the above situation, 1500 kcal is needed.

Iron deficiency anemia is a world wide concerned problem especially for the populations of children and pregnant women. Using table salt as a vehiclefor iron fortification is one way of preventive measures. This observation was using iron fortified salt with the level which provided an additive 5 to 10 mg of iron supplement for preschool children daily. Basically two groups of children living in different kindergartens, one had been given the fortified salt and the other served as control for one year. The initial hemoglobin levels of both group was the same, but one year later the hemoglobin level of the experimental group had changed from 11.78 ?0.57 up to 12.72? 0.70 and was different significantly from the control (p

Hepatocyte nuclear factor 4α is a transcription factor of the nuclear hormone receptor superfamily and plays a very important role in the differentiation and development of the digestive system as well as the polarity regulation,which is considered to be a tumor suppressor gene.It also plays a very important role in digestive tumorigenesis,invasion and metastasis of hepatic carcinoma,colon cancer and gastric cancer,which is closely associated with epithelial-to-mesenchymal transition,the regulation of cell proliferation and wnt signaling pathway.HNF4α expression and its regulation mechanism in the digestive system tumors are now the research focus.

Objective: To further understand the roles of gap junctional intercellular communication in carcinogenesis and progression of human lung cancer. Methods: The heterologous communication was characterized among human lung epithelial cells HLEC, human lung fibroblasts HLF, human lung giant carcinoma PG cells and its Cx43 transfectants PG/C4 by using a preloading assay. Cx43 immunofluorescent staining and Northern blot were performed to examine Cx43 gene expression. Results: Although both human lung firoblasts HLF and epithelial cells HLEC expressed Cx43 and had very strong homologous communication, HLEC cells were unable to communicate with HLF cells. The human lung carcinoma cell line PG was defective of both homologous communication, and heterologous communication with its epithelial origin HLEC. Transfection of Cx43 into PG cells, which rescued PG cells' homologous communication and enhanced heterologous communication with HLF cells, could restore heterologous coupling with HLEC cells. Conclusion: Selective heterologous communication exists among different kinds of human lung cells. when human lung carcinoma cells lost coupling with its epithelial origin, Cx43 gene expression is not enough to establish heterologous communication between them.

Objective The aim of this study was to prepare anti-snail polyclonal antibody and make it widely useful in snail detection. Methods The DNA fragment encoding human full length 264 amino acid of snail was obtained by PCR from cDNA library of human umbilical vein epithelial cells and was cloned into pGEX-4T-1 plasmid expressing glutathione S-transferase(GST).The GST-snail fusion protein was expressed by E.coli BL21 after IPTG induction and purified from total proteins of BL21 transformed by the recombinant plasmid pGEX-4T-1/snail.The New Zealand rabbit was immunized with the purified fusion protein to prepare polyclonal antiserum.The antiserum was identified by western blotting and immunofluorescent staining. Results The prokaryotic expression plasmid pGEX-4T-1/ snail was successfully constructed,and the fusion protein GST-snail was expressed efficiently.The polyclonal antibody raised in the rabbit could react specifically with snail in human cells.Conclusion The snail antiserum was of good purity with high titer and specificity which could satisfy the requirement for studying immuno-analysis on snail protein.

Objective To reduce information loss in the refining processing of photoplethysmographic (PPG) pulse waveform. Method A novel PPG pulse waveform refining processing technique, named truncation/extrapolation technique was proposed. The key point of the proposed technique was to preserve the shape pattern of the most significant parts of the waveform at the expense of the distortion of the insignificant part. Thus, as compared with the conventional time-normalization method, the proposed technique ensured the accumulation coherent of the signal energy could be. Result Waveform analysis and comparison of experimental data between two methods verified the effectiveness of the proposed method in maintaining the most significant time domain features of the pulse waveform over a relatively wide range of the heart rate change, especially the shape and width of the dominant peak and the position of the dicrotic notch of the first derivative of PPG(dPPG). Conclusion The proposed method reduces the information loss in PPG pulse waveform refining processing, thus helps further processing of the PPG signal using some advanced signal processing techniques, such as waveform modeling and pattern recognition.

Objective: To determinate the content and stability of 2,3,5,4′ stilbene glucoside in prepared Radix Polygoni Multiflori from differet areas.Methods:The content of 2,3,5,4′ stilbene glucoside was determined by HPLC, and the test of its stability was carried out on high temperature and 60 Co ? ray radiation. Results: The contents of 2,3,5,4′ stilbene glucoside in prepared Radix Polygoni Multiflori from different areas varied from 0.127% to 4.150%. 2,3,5,4′ stilbene glucoside was unstable under high temperature especially in solution, but it was stable under 60 Co ? ray radiation. Conclusion: The qualities of prepared Radix Polygoni Multiflori are different in different areas.

Objective To investigate the relationship among the levels of B-type natriuretic peptide (BNP) and the extent,prognosis of acute aortic dissection (AAD).Methods The serum levels of BNP were measured in 42 AAD cases.According to the increasing level of BNP,the patients were divided into two groups:group A ( BNP≥ 500 ng/L,n =23 ) and group B ( BNP ＜ 500 ng/L,n =19 ).The extent of the disease and cardiovascular events were compared between the two groups.Results All the patients have elevated levels of BNP.The incidence of lasting aortic dissection (47.83％ vs.15.79％,P =0.048 ) and mortality ( 26.09％ vs.0,P =0.024) were higher in group A compared with those of group B.Conclusion The lasting and higher levels of BNP predict the increasing risk of bad prognosis in acute aortic dissection.