Interactions of CO, HCl, and Sox in Pulverised Coal Flames

The effect of HCl and SO_2 on CO oxidation in pulverised coal flames was investigated experimentally and kinetically in an entrained flow combustion reactor. Two bituminous coals (German 'Goettelborn' and a Polish coal) were used as fuels with a feeding rate of 1 or 1.5 kg/h. HCl or SO_2 is introduced into the reactor premixed with the primary air. Experimental results indicate that HCl addition may inhibit CO oxidation in coal flames and increases CO emission. Reducing temperature in the reactor will enhance the inhibitory effect of HCl on CO oxidation. The measured CO profiles along the reactor height clearly show that the addition of HCl may inhibit CO oxidation. In the experimental range of SO_2 addition. The inhibiting effect of SO_2 on CO oxidation is less significant than HCl. A detailed kinetic mechanism is used to model the reactions. And the controlling reactions are analysed.

第9届国际等离子体化学会议(ISPC-9)

概述了第9届国际等离子体化学会议的论文和活动情况,对这个领域的发展提出了一些看法。

桃不同组织中的葡萄糖/果糖比值特点及己糖代谢

以不同葡萄糖/果糖（G/F）类型的桃品种（正常G/F 品种：‘燕红’、‘冈山白’和‘山一白桃’；高G/F 品种：‘龙124’、‘龙246’、‘张黄7 号’和‘临白7 号’）为试材，测定果实发育期果实、叶片、韧皮部和木质部中糖和淀粉含量，并分别在果实第一迅速生长期、硬核期和成熟期测定了‘燕红’、‘山一白桃’、‘龙124’、‘龙 246’和‘临白7号’果实和叶片中己糖相关酶。研究不同G/F类型桃品种产生G/F差异的组织器官和时期，并且分析相关代谢酶调控机理。 两类不同G/F 桃果实中均以蔗糖作为主要碳水化合物积累形式，花后70 d前蔗糖含量很低，随后快速积累直至果实成熟；山梨醇含量较为稳定，高G/F品种‘龙124’两年间在未成熟果实中山梨醇含量高于正常 G/F品种；葡萄糖和果糖含量在果实第一迅速生长期积累，之后逐渐降低。高 G/F 品种‘龙124’和‘临白7号’成熟果实中葡萄糖含量高于‘龙246’和正常 G/F 品种。正常G/F品种果实、叶片、韧皮部和木质部中葡萄糖和果糖含量基本相等，G/F基本保持在0.7-1.5。高G/F品种果实、叶片中葡萄糖显著高于果糖，果实中G/F在1.6-8.8，叶片中G/F在果实未成熟时为2.5-9.3，在果实成熟期为14.5-21.3。然而韧皮部和木质部中葡萄糖略高于果糖或基本相等，但较正常G/F品种高。因此，光合产物在韧皮部的运输对桃果实的G/F 没有显著影响。 在第一迅速生长期和成熟期时，所有供试桃品种果实和叶片中合成己糖的NAD+-SDH 和 SOX较为活跃，而分解己糖的FRK、GLK和PGI则保持在较低水平；在果核硬化期则相反，果实和叶片中合成己糖的NAD+-SDH 和 SOX活性较低，而分解己糖的FRK、GLK和PGI则较为活跃。高G/F品种‘龙124’和‘龙246’在果核硬化期果实中的FRK、NADP+-SDH 和GLK活性显著高于正常G/F品种，而高G/F品种‘临白7号’则与正常G/F品种没有明显差异。可见，高G/F品种间己糖代谢调控机制也有所差异。此外，叶片中两种G/F类型间的己糖代谢相关酶差异并无明显规律，由此我们认为叶片存在与果实类似但相对独立的调控机制。

47,XY,+dcl(9)(q34)wcp(9+)/46,XY伴隐睾一例

患儿男,10岁,因"双侧隐睾"就诊.患儿系足月、顺产、5岁时发现头颅大,经医院诊断为脑积水.几岁时做双侧隐睾手术.患儿身高120 cm.头颅发育不规则,颜面不对称,自小严重的智力低下,说话不清.

Comparison of Pax1/9 locus reveals 500-Myr-old syntenic block and evolutionary conserved noncoding regions

Identification of conserved genomic regions within and between different genomes is crucial when studying genome evolution. Here, we described regions of strong synteny conservation between vertebrate deuterostomes (tetrapods and teleosts) and invertebrat

Maximin 9, a novel free thiol containing antimicrobial peptide with antimycoplasma activity from frog Bombina maxima

Amphibian skin is a rich resource of antimicrobial peptides, like maximins and maximin Hs from frog Bombina maxima. Novel cDNA clones encoding a precursor protein, which comprises a novel maximin peptide (maximin 9) and reported maximin H3, were isolated from two constructed skin cDNA libraries of B. maxima. The predicted primary structure of maximin 9 is GIGRKFLGGVKTTFRCGVKDFASKHLY-NH2. A surprising substitution is at position 16, with a free cysteine in maximin 9 rather than usual conserved glycine in other reported maximins. Maximin 9, the homodimer form and its Cys(16) to Gly(16) mutant were synthesized and their antimicrobial activities were evaluated. Unlike previously reported maximin 3, the tested bacterial and fungal strains were resistant to maximin 9, its homodimer and the Cys(16) to Gly(16) mutant (with MICs > 100 mu M). On the other hand, interestingly, while eight clinical Mollicutes strains were generally resistant to maximin 9 homodimer and its Cys(16) to Gly(16) mutant, most of them are sensitive to maximin 9 at a peptide concentration of 30 mu M, especially in the presence of dithiothreitol. These results indicate that the presence of a reactive Cys residue in maximin 9 is important for its antimycoplasma activity. The diversity of antimicrobial peptide cDNA structures encountered in B. maxima skin cDNA libraries and the antimicrobial specificity differences of the peptides may reflect well the species' adaptation to the unique microbial environments. (c) 2005 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.