Study on the serum levels of soluble intercellular adhesion molecule-1 (sICAM-1) in patients with Helicobacter pylori Infection

Objective: To evaluate the interaction between serum levels of soluble intercellular adhesion molecule-1 (sICAM-1) and Helicobacter pylori (H. pylori) infection in patients with chronic gastritis and peptic ulcer. Methods: The serum levels of sICAM-1 in 205 patients with chronic gastric diseases were detected by ELISA method and the status of H. pylori was determined by histologic examination, RUT, 14C - UBT, and serology. The sera obtained from 18 healthy volunteers served as controls. Results: The serum levels of sICAM-1 were significantly higher in patients with H. pylori positive than those of H. pylori negative (889.43±32.52 ng/ml vs. 747.07±30.45 ng/ml, P<0.05). The serum levels of sICAM-1 in patients with mild, moderate and severe infection of H. pylori were 841.68±72.36 ng/ml, 905.43±37.59 ng/ml and 1012.54±49.34 ng/ml,respectively (P<0.05). The serum levels of sICAM-1 proved to be significantly correlated with the density of H. pylori colonization in gastric mucosa (rs =0.316, P<0.001). The serum levels of sICAM-1 in patients with chronic gastritis and peptic ulcer were significantly higher than those in healthy controls (P<0.05). Conclusions: These results indicated that H. pylori infection up-regulates the expression of sICAM-1.     

Study on the serum levels of soluble intercellular adhesion molecule-1 (sICAM-1) in patients with Helicobacter pylori Infection

ＩＮＴＲＯＤＵＣＴＩＯＮＳｉｎｃｅｔｈｅｆｉｒｓｔｓｕｃｃｅｓｓｆｕｌｉｓｏｌａｔｉｏｎｏｆＨ .ｐｙ ｌｏｒｉｉｎ 1 982 ,Ｈ .ｐｙｌｏｒｉｉｎｆｅｃｔｉｏｎｈａｓｂｅｅｎｆｏｕｎｄｔｏｂｅａｓｓｏｃｉａｔｅｄｗｉｔｈｖａｒｉｏｕｓｄｉｓｅａｓｅｓｉｎｃｌｕｄｉｎｇｃｈｒｏｎｉｃｇａｓｔｒｉｔｉｓ,ｐｅｐｔｉｃｕｌｃｅｒｄｉｓｅａｓｅｓ(Ｄｏｏｌｅｙｅｔａｌ.,1 989;Ｇｒａｈａｍｅｔａｌ.,1 992 ) ,ａｎｄｇａｓｔｒｉｃｎｅｏｐｌａｓｍｓ(Ｂａｙｅｒｄｏｒｆｆｅｒｅｔａｌ.,1 995) .Ｉｔｗａｓｓｕｇｇｅｓｔ…     

Association between SNP rs1800875, serum chymase and immunoglobulin E levels in patients with coronary heart disease

Objective  

The gene for mast cell chymase (CMA1) is an ideal candidate for investigating the genetic predisposition to coronary heart disease (CHD), as activated mast cells have been found to be present in a greater proportion in the shoulder region of atheroma than in normal coronary intimae. Previous studies have indicated that CMA1 promoter polymorphism rs1800875 may be involved in regulating immunoglobulin E (IgE) levels in patients with eczema, and it is associated with the progression of immunoglobulin A nephropathy.     

Study on the expression and mutation of human telomeric repeat binding factor ( hTRF1 ) in 10 malignant hematopoietic cell lines

Objective: Detecting the expression and mutation of human telomeric repeat binding factor (hTRF1) in 10 malignant hematopoietic cell line cells on the base of determining its genomic structure and its four pseudogenes to clarify if hTRF1 mutation is one of the factors of the activation of telomerase. Methods: hTRF1cDNA sequences were obtained from GenBank, its genome structure and pseudogenes were forecasted by BLAST and other biology information programs and then testified by sequencing. Real-time RT-PCR was used to detect the expression of hTRF1mRNA in 10 cell line cells, including myelogenous leukemia cell lines K562, HL-60, U-937, NB4, THP-1, HEL and Dami; lymphoblastic leukemia cell lines 6T-CEM, Jurkat and Raji. Telomerase activities of cells were detected by using telomeric repeat amplification (TRAP)-ELISA protocol. PCR and sequencing were used to detect mutation of each exon of hTRF1 in 10 cell line cells. Results: hTRF1 gene, mapped to 8q13, was divided into 10 exons and spans 38.6 kb. Four processed pseudogenes of hTRF1 located on chromosome 13, 18, 21 and X respectively, was named as ψhTRF1-13, ψhTRF1-18, ψhTRF1-21 and ψhTRF1-X respectively. All cell line cells showed positive telomerase activity. The expression of hTRF1 was significantly lower in malignant hematopoietic cell lines cells (0.0338, 0.0108:_0.0749) than in normal mononuclear cells (0.0493, 0.0369:_0.128) (P=0.004). But no significant mutation was found in all exons of hTRF1 in 10 cell line cells. Four variants were found in part of intron 1, 2 and 8 of hTRF1. Their infection on gene function is unknown and needs further studies. Conclusion: hTRF1 mutation is probably not one of the main factors for telomerase activation in malignant hematopoietic disease. Project supported by the National Basic Research Program (973) of China (No. 2002CB713700) and the National Natural Science Foundation of China (No. 39870339)     

四乙稀五胺树脂对铬的吸附性

报导了大孔型交联的聚乙烯苄四乙烯五胺树脂对Cr(V1)的吸附、洗脱条件,吸附速率常数及活化能、反应热力学函数、Freundlich常数等,并讨论了吸附机理.该树脂对微量(Cr(V1)的富集、回收或除去均有较好的效果.     

N-(4-羟基苯基)马来酰亚胺合成条件的探讨

以马来酸酐和对氨基酚为原料,采用两步法合成N-(4-羟基苯基)马来酰亚胺,并采用正交实验方法研究了原料配比、反应时间、催化剂用量等对产率的影响,确定了优化合成条件。     

Experimental study on the inhibition of biological reduction of Fe(III)EDTA in NO x absorption solution

Scrubbing of NO _x from the gas phase with Fe(II)EDTA has been shown to be highly effective. A new biological method can be used to convert NO to N₂ and regenerate the chelating agent Fe(II)EDTA for continuous NO absorption. The core of this biological regeneration is how to effectively simultaneous reduce Fe(III)EDTA and Fe(II)EDTA-NO, two mainly products in the ferrous chelate absorption solution. The biological reduction rate of Fe(III)EDTA plays a main role for the NO _x removal efficiency. In this paper, a bacterial strain identified asKlebsiella Trevisan sp. was used to demonstrate an inhibition of Fe(III)EDTA reduction in the presence of Fe(II)EDTA-NO. The competitive inhibition experiments indicted that Fe(II)EDTA-NO inhibited not only the growth rate of the iron-reduction bacterial strain but also the Fe(III)EDTA reduction rate. Cell growth rate and Fe(III)EDTA reduction rate decreased with increasing Fe(II)EDTA-NO concentration in the solution. Project (No. 20176052) supported by the National Natural Science Foundation of China and the Scientific Research Foundation for Returned Overseas Chinese Scholars, Ministry of Education     

A Note on Vulnerability in Graphs of Diameter Five （ Ⅱ ）

The line persistence of a graph G, Pt （ G ） is the minimum number of lines which must be removed to increase the diameter of G. In Ref. [7] （J. Shanghai Univ., 2003,7（4）：352-357）, we gave a characterization of graphs of diameter five with ρ1 （ G ）≥2. In this paper we will show that each of the 8 special graphs Xi （ i = 1,2,3,4,5,6,7,8） listed in condition （2） of Theorem 1 in Ref. [7] can not be deleted. Therefore the results we obtained in Ref. [7] can not in general be improved.     

乙醇热合成3，4-二氢嘧啶-2（1H）-酮的工艺研究

利用氨基磺酸作催化剂,在乙醇热条件下合成了4-苯基-6-甲基-5-乙氧羰基-3,4-二氢嘧啶-2-酮,优化了工艺条件．结果表明：当苯甲醛用量为10mmol,苯甲醛、乙酰乙酸乙酯、尿素、氨基磺酸投料比为1：1．2：1．5：0．8,无水乙醇为10mL,温度为80％时,反应2h产物收率达93．6％．该工艺是一种简便有效的方法．     

新试剂1-(2-羟基-3,5-二硝基苯基)-3-[4-(苯基偶氮)苯基]-三氮烯与银的显色反应研究及应用

研究了新试剂1-（2-羟基-3,5-二硝基苯基）-3-［4-（苯基偶氮）苯基］-三氮烯（HD－NPAPT）,在NaOH介质中,非离子表面活性剂TritonX－100存在下,与银离子的显色反应．研究结果表明,HDNPAPT试剂与银离子形成2：1的红色配合物,配合物的λmax＝540nm,表观摩尔吸光系数为5．41×104L·mol-1·cm－1,银离子浓度在0~0.32mg／L范围内符合比耳定律．方法应用于合成水样及粗铅矿中微量银的测定,结果满意．     

Effect of CO2 enrichment on the glucosinolate contents under different nitrogen levels in bolting stem of Chinese kale (Brassica alboglabra L.)

The effects of CO₂ enrichment on the growth and glucosinolate (GS) concentrations in the bolting stem of Chinese kale (Brassica alboglabra L.) treated with three nitrogen (N) concentrations (5, 10, and 20 mmol/L) were investigated. Height, stem thickness, and dry weights of the total aerial parts, bolting stems, and roots, as well as the root to shoot ratio, significantly increased as CO₂ concentration was elevated from 350 to 800 μl/L at each N concentration. In the edible part of the bolting stem, 11 individual GSs were identified, including 7 aliphatic and 4 indolyl GSs. GS concentration was affected by the elevated CO₂ concentration, N concentration, and CO₂×N interaction. At 5 and 10 mmol N/L, the concentrations of aliphatic GSs and total GSs significantly increased, whereas those of indolyl GSs were not affected, by elevated atmospheric CO₂. However, at 20 mmol N/L, elevated CO₂ had no significant effects on the concentrations of total GSs and total indolyl GSs, but the concentrations of total aliphatic GSs significantly increased. Moreover, the bolting stem carbon (C) content increased, whereas the N and sulfur (S) contents decreased under elevated CO₂ concentration in the three N treatments, resulting in changes in the C/N and N/S ratios. Also the C/N ratio is not a reliable predictor of change of GS concentration, while the changes in N and S contents and the N/S ratio at the elevated CO₂ concentration may influence the GS concentration in Chinese kale bolting stems. The results demonstrate that high nitrogen supply is beneficial for the growth of Chinese kale, but not for the GS concentration in bolting stems, under elevated CO₂ condition. Project (No. 2007CB109305) supported by the National Basic Research Program (973) of China     

Positive temperature coefficient of resistivity effects of semiconducting （Bi（1/2）Na（1/2））TiO3-CaTiO3-BaTiO3 ceramics sintered in air atmosphere

Y^3＋-doped （Bi 1/2 Na 1/2） TiO 3-CaTiO 3-BaTiO 3 （BNCBT） positive temperature coefficient of resistivity （PTCR） ceramics sintered in air atmosphere were investigated in this study. （Bi 1/2 Na 1/2） TiO 3 （BNT） component can remarkably increase the onset temperature T c of PTCR ceramics with the expense of the resistivity R 25 increase. CaTiO 3 （9–27 mol%） component can decrease the resistivity, and adjust the effects of BNT phase on the T c point. For the sample containing 3 mol% CaTiO 3 , T c raises from 122 ℃ to 153 ℃ when only 0.6 mol% BNT added, while for the ones with higher CaTiO 3 content （9–27 mol%）, T c is only increased by a rate of 8–9℃/1.0 mol% BNT. The effects of BNT and CaTiO 3 components on R25/Rmin （negative temperature coefficient effect） are also discussed.     

8-喹啉偶氮显色剂7-(8-喹啉偶氮)-8-羟基萘-1-氨基-3,6-二磺酸的合成及其与钴(Ⅱ)显色反应的研究

报道了 8 -喹啉偶氮显色剂 7-(8-喹啉偶氮 ) -8-羟基萘 -1 -氨基 -3 ,6-二磺酸 (7-QAH)的合成。研究了其与Co(Ⅱ )的显色反应。在pH4.7的缓冲体系中 ,试剂与Co(Ⅱ )形成绿色配合物 ,其最大吸收波长位于 648nm ,表观摩尔吸光系数为 3 .6× 1 0 4L·mol-1·cm-1,钴量在 0～ 1 2 μg/ 2 5mL范围内符合比尔定律。     

Clones identification of Sequoia sempervirens (D. Don) Endl. in Chile by using PCR-RAPDs technique

A protocol of polymerase chain reaction-random amplified polymorphic DNAs (PCR-RAPDs) was established to analyse the gene diversity and genotype identification for clones of Sequoia sempervirens (D. Don) Endl. in Chile. Ten (out of 34) clones from introduction trial located in Voipir-Villarrica, Chile, were studied. The PCR-RAPDs technique and a modified hexadecyltrimethylammonium bromide (CTAB) protocol were used for genomic DNA extraction. The PCR tests were carried out employing 10-mer random primers. The amplification products were detected by electrophoresis in agarose gels. Forty nine polymorphic bands were obtained with the selected primers (BG04, BF07, BF12, BF13, and BF14) and were ordered according to their molecular size. The genetic similarity between samples was calculated by the Jaccard index and a dendrogram was constructed using a cluster analysis of unweighted pair group method using arithmetic averages (UPGMA). Of the primers tested, 5 (out of 60) RAPD primers were selected for their reproducibility and high polymorphism. A total of 49 polymorphic RAPD bands were detected out of 252 bands. The genetic similarity analysis demonstrates an extensive genetic variability between the tested clones and the dendrogram depicts the genetic relationships among the clones, suggesting a geographic relationship. The results indicate that the RAPD markers permitted the identification of the assayed clones, although they are derived from the same geographic origin. Project (No. CONICYT-FONDEF PROYECT D01 I 1008) supported by the National Commission of Science and Research of Chile     

1-吡啶-3-[4-(苯基偶氮)苯基]-三氮烯与镍的显色反应研究

研究了1-吡啶-3-[4(苯基偶氮苯基]-三氮烯(PYPAPT).在NaOH碱性条件中,非离子表面活性剂Tween存在下,与金属镍离子(Ni~(2+))的显色反应。Ni~(2+)与PYPAPT形成1:3的红色配合物,配合物最大吸收位于536nm,表观摩尔吸光系数为9.00×10~1,Ni~(2+)离子含量在0～0.32mg/L符合比尔定律。研究的新方法用于测定铝合金中的镍,结果满意。     

双呋喃甲醛Schiff碱金属铜(Ⅱ)配合物为载体的高选择性硫氰酸根离子电极

报道了二醋酸双(呋喃甲醛)缩邻苯二胺铜(Ⅱ)为载体的PVC膜电极.该电极对硫氰酸根离子(SCN-)具有高的电位选择性和灵敏度,并呈现反Hofmeister选择性行为.采用交流阻抗技术和紫外可见光谱技术初步研究了电极的响应机理,结果表明配合物中心金属原子的结构以及载体本身的结构与电极的响应行为之间有非常密切的构效关系.将制得的电极初步应用于实际废水样品分析,结果与HPLC法一致.     

云南滇中(楚雄)红层区地下水资源特征分析

论文依据滇中(楚雄)红层区自然地理及地质条件从地下水动态变化特征、地下水富集规律、地下水储水构造类型等方面分析了滇中(楚雄)红层区地下水资源特征,提出了滇中(楚雄)红层区地貌类型与地下水赋水机制的基本类型和规律,并为地下水资源的开发利用提出了参考建议。     

现代汉语"名1+(的)+名2"定中结构篇名研究

现代汉语"名1 (的) 名2"定中结构篇名在音节、组合及语义认知方面呈现出一些特点。"名1 (的) 名2"定中结构篇名化的动因不仅体现在称名性和话题性上,还体现在节省空间、扩大信息量上。