黄海葵中新不饱和脂肪醛的化学结构

从黄海葵anthoplelura xanthograninica(Brerkly)中，分离得到一种新颖结构的α－不饱和醛类化学物，其化学结构经各种波谱解析得以确定；化合物1对肿瘤细胞HL－60具有抑制活性。     

离子液体／水混合溶剂促进醛酮还原反应

研究醛酮在离子液体[bmim]Br和水组成的混合溶剂体系中的还原反应,以离子液体[bmim]Br和水组成的混合物作为反应介质能有效促进醛酮的硼氢化钠还原.实验结果表明,该法条件温和、产率高、反应时间短、后处理简单、离子液体可重复使用.     

肉桂酰氧基苯基卟啉及钴配合物的合成及其光催化性质

合成了四－对（肉桂酰氧基）苯基卟啉及其钴配合物,以ＣｏＴＣＣＯＰＰ）,以ＣｏＴＣＣＯＰＰ为催化剂对芳香醛的光催化氧化行为进行了研究,探讨了底物效应,光催化剂的取代基效应、光源效应其反应机理。     

1-丁基-3-甲基咪唑六氟磷酸盐中合成 5-亚烃基巴比妥酸衍生物

在室温离子液体1-丁基-3-甲基咪唑六氟磷酸盐([bmim]PF6)中,巴比妥酸或硫代巴比妥酸与芳香醛发生Knoevenagel型缩合反应,以85％～93％的产率生成相应5-亚烃基巴比妥酸或硫代巴比妥酸衍生物。     

用蒽和对苯二甲醛合成的COPNA树脂的研究

以蒽为单体 ,对苯二甲醛为交联剂 ,在对甲基苯磺酸催化下 ,进行合成 COPNA树脂实验研究 .经反复实验 ,筛选出最佳对甲基苯磺酸 ( PTS)质量分数为 5% ,最佳反应温度为 1 90℃ .通过对COPNA树脂的红外光谱和核磁共振波谱的分析 ,证明蒽 -对苯二甲醛在酸催化下 ,发生亲电取代反应 .并对树脂的耐热性能进行了评价 .结果表明 :原料摩尔比为 1 .0的 COPNA树脂在 40 0℃开始明显失重 ,最大失重速率时的加热温度为 52 9.1℃ ,失重速率为 2 .63× 1 0 -2 min-1;80 0℃时炭化收率为 58.7     

含酚废水的处理与机理研究

本文结合我国中小型酚醛树脂粘合剂厂的特点，给出了一条切实可行的、经济合理的含酚废水处理的工艺路线，并就其反应机理作了说明．实践证明，该工艺路线是可靠的。     

添加肉桂醛的海藻酸钠/蟹壳粉双交联水凝胶吸水衬垫对冷却肉的保鲜效果

托盘包装的冷却肉在4℃贮藏过程中会流出血水并聚积在包装盒底部,血水与肉长时间接触不仅易滋生微生物,还会影响肉的色泽,加速冷却肉的腐败变质,缩短货架期。以脱乙酰基蟹壳粉为天然交联剂,不同体积分数的肉桂醛(0.3%、0.6%、0.9%、1.2%)为抑菌剂,获得了高强度、高吸水性的双交联海藻酸钠抑菌水凝胶吸水衬垫,用于吸收冷却肉在贮藏过程中渗出的血水。结果表明:脱乙酰基蟹壳粉与海藻酸钠之间发生了Ca²⁺交联和聚电解质相互作用,肉桂醛的加入可显著改善材料的性能,当肉桂醛体积分数为0.6%与0.9%时,水凝胶吸水衬垫的结构更加致密并具有优异的溶胀性能、机械强度和抑菌能力。与未用吸水衬垫和使用木纤维吸水纸的处理组相比,海藻酸钠/蟹壳粉抑菌水凝胶吸水衬垫处理组冷却肉的pH值、挥发性盐基氮值、菌落总数与挥发性气味等指标的增幅显著降低(P<0.05),且汁液流失率少,汁液封存率为100%。海藻酸钠/蟹壳粉抑菌水凝胶吸水衬垫使用天然来源的蟹壳粉作为交联剂,脱乙酰基蟹壳粉与海藻酸钠形成双交联网络结构,不仅提高了材料的机械性能与凝胶强度,而且可提高废弃物的综合利用率,显示出了高于商业吸水衬垫的溶胀率,吸收冷却肉渗出物时可将渗出物封存于网状结构内部而不溢出,在减缓冷却肉微生物增殖和延长保质期方面具有一定优势。     

Genomic cloning and sequencing of betaine aldehyde dehydrogenase gene in spinach

A genomic library derived from leaves of spinach was constructed with the λGem11_BamHI Arms as the vector. The library was screened using the BADH cDNA of mountain spinach as a probe and six positive clones were obtained through three rounds of screening. One of the positive clones named D, which was hybridized with the 5′600 bp fragment of mountain spinach BADH cDNA, was selected and further analyzed. The size of the insert in clone D was about 12 kb. 8 856 nucleotides of the insert were sequenced which contained 2 459 nucleotides of 5′ noncoding region, 6 111 nucleotides of the complete sequence of the BADH gene, and 286 nucleotides of a 3′ noncoding region. The result of sequence analysis indicated that the BADH gene contained 14 introns and the junction sequences at splicing sites followed the GT_AG rule basically.     

脂肪族水性聚氨酯性能的研究

以异佛尔酮二异氰酸酯(IPDI)和聚四亚甲基二醇(PTMG)及二羟甲基丙酸(DMPA)为主要原料制备了水性聚氨酯乳液，并对乳液的性能进行了测试和分析。结果表明，二羟甲基丙酸(DMPA)用量、n(NCO)／n(OH)及扩链荆是影响乳液及胶膜性能的主要因素。     

Distinct but parallel evolutionary patterns between alcohol and aldehyde dehydrogenases: addition of fish/human betaine aldehyde dehydrogenase divergence

Alcohol dehydrogenases (ADHs) of the MDR type (medium-chain dehydrogenases/reductases) have diverged into two evolutionary groups in eukaryotes: a set of 'constant' enzymes (class III) typical of basal enzymes, and a set of 'variable' enzymes (remaining classes) suggesting 'evolving' forms. The variable set has larger overall variability, different segment variability, and variability also in functional segments. Using a major aldehyde dehydrogenase (ALDH) from cod liver and fish ALDHs deduced from the draft genome sequence of Fugu rubripes (Japanese puffer fish), we found that ALDHs form more complex patterns than the ADHs. Nevertheless, ALDHs also group into 'constant' and 'variable' sets, have separate segment variabilities, and distinct functions. Betaine ALDH (class 9 ALDH) is 'constant,' has three segments of variability, all non-functional, and a limited fish/human divergence, reminiscent of the ADH class III pattern. Enzymatic properties of fish betaine ALDH were also determined. Although all ALDH patterns are still not known, overall patterns are related to those of ADH, and group separations may be distinguished. The results can be interpreted functionally, support ALDH isozyme distinctions, and assign properties to the multiplicities of the ADH and ALDH enzymes.