Probabilistic Cloning and Quantum Computation

We discuss the usefulness of quantum cloning and present examples of quantum computation tasks for which thecloning offers an advantage which cannot be matched by any approach that does not resort to quantum cloning.In these quantum computations, we need to distribute quantum information contained in the states about whichwe have some partial information. To perform quantum computations, we use a state-dependent probabilistic quantum cloning procedure to distribute quantum information in the middle of a quantum computation.     

Osmotic Regulation of Betaine Content in Leymus chinensis Under Saline-alkali Stress and Cloning and Expression of Betaine Aldehyde Dehydrogenase（BADH） Gene

The potted Leymus chinensis seedlings were treated with saline-alkali solution of six different（from Ⅰ to Ⅵ） concentrations. The results demonstrate that the betaine content and Betaine-aldehyde dehydrogenase（BADH： EC 1.2.1.8） activities have a direct relation with increased stressing time in the same treatment; both exhibit a single peak with increasing the concentration of saline-alkali solution, and number V shows the highest value. The BADH gene of Leyrnus chinensis was cloned by RT-PCR and RACE technology and was designated as LcBADH. The cDNA sequence of LcBADH was 1774bp including the open reading frame（ORF） of 1521bp（coding 506 amino acids）. The vector of prokaryotic expression was constructed by inserting the LcBADH gene fragmcnt into pET30a（＋） and transformed into E. coli BL21（DE3）. The result of SDS-PAGE shows that the idio-protein with a molecular mass of 56.78 kDa was effectively expressed in the recombinant bacteria induced by isopropyl fl-D-thiogalactoside（IPTG）.     

马铃薯试管微型薯诱导的研究

选用大西洋(Atlantic)为材料,采取正交试验的方法,研究培养基种类、B9浓度和光照三个因子对试管薯诱导的影响.结果表明,光照的影响存在极显著的水平差异,另两个因子水平间差异均不显著.实验表明提高总薯重和平均薯重的最优组合是MS+5 mg@L-1B9+黑暗;提高薯数的最优组合是B5+0 mg@L-1B9+黑暗.