职业院校教学型实验室建设与管理

实验室是职业院校的重要设施, 对提高学生的实践能力, 改善教学效果具有十分重要的作用. 本文对职业院校教学型实验室的建设与管理展开了探讨, 分析其中存在的问题, 并提出了相应的解决方案及措施.

高校大学生学风建设存在的问题及对策研究

大学生学风建设不仅是衡量高校教育质量和社会影响力的重要内容,也是体现学校办学水平和品位的重要标志.如何进一步加强学风建设,为学生创造良好的学习环境,充分激发学生对学习的热情,引导学生明确学习目的和确立奋斗目标,增强内在学习动力,提升将来踏入社会的就业竞争力等,已成为当前高校学生工作管理研究和创新的重要内容.

Comparison of Heavy Metal Accumulation in Four Vegetables Grown in the Soils Contaminated with Multiple Heavy Metals

In order to compare the differences in the accumulation of plumbum(Pb),cadmium(Cd),chromium(Cr),cuprum(Cu),nickel(Ni)and zinc(Zn)from the multi-contaminated,alkalescent soil in the plants of four-season big-leaf coriander,butter lettuce,four-season fast-growing pakchoi and four-season parsley to choose low accumulation vegetables,a pot experiment was conducted by using heavy metal salts to simulate high-,moderate-and low-level heavy metals multi-contaminated soils.The results showed that the multi-contaminated soil by high levels of Pb,Cd,Cr,Cu and Zn produced inhibition on biomass of four-season fast-growing pakchoi,failing to collect samples,but had no obvious inhibition on the growth of the three other vegetables.Among the four kinds of vegetables examined,the accumulation ability of four-season parsley to the five heavy metals of Pb,Cd,Cr,Cu and Zn was the strongest,while the accumulation ability of four-season fast-growing pakchoi to Ni was the strongest.In the high-level contaminated soil,the underground part of these four vegetables grown was more likely to accumulate heavy metals than their aboveground part.Both of vegetable varieties and heavy metal types can affect the accumulation of heavy metals in vegetables.Our research also found that four-season big-leaf coriander was high yielding and low accumulation of heavy metals.