三聚氰胺包合法分离不饱和脂肪酸

采用三聚氰胺包合法从混合脂肪酸中分离不饱和脂肪酸(UFAs),探讨了三聚氰胺/脂肪酸质量比、晶化包合温度、包合时间对包合效果的影响,并采用傅里叶变换红外光谱(FT-IR)、X射线衍射(XRD)和核磁...国家重点研发计划资助(2016YFD0600802);; 云南省重大科技专项计划(2018ZG003);; 云南省教育厅科学研究基金项目资助(2018Y119

载银介孔SBA-15吸附剂的制备及其对脂肪酸甲酯的吸附研究

以介孔分子筛SBA-15作为载体,在3-氨基丙基三乙氧基硅烷(APTS)对SBA-15表面修饰的基础上负载银离子制备Ag~+-APTS/SBA-15吸附剂,采用氮气吸附-脱附、X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、透射电镜(TEM)、扫描电镜-能谱(SEM-EDS)对吸附剂进行表征,并将吸附剂应用于混合脂肪酸甲酯的分离以考察其吸附性能。氮气吸附-脱附、XRD和TEM分析结果可以看出,制备的吸附剂具有规则有序孔道结构;FT-IR数据显示,介孔SBA-15表面被APTS成功修饰;SEM-EDS结果表明,银离子成功负载到载体SBA-15上;对混合脂肪酸甲酯吸附研究表明,该吸附剂对不饱和脂肪酸甲酯(UFAMEs)吸附效果较好,且随着银离子负载量的增加以及UFAMEs双键数的增多,吸附效果增强;当银离子负载量为25%时,吸附剂对亚麻酸甲酯吸附率高达53.47%。国家重点研发计划项目(2016YFD0600802);;\n厦门大学闽江学者特聘教授科研启动项目(无编号);;\n云南省重大科技专项计划(2018ZG003

Study of hydrodynamics and its impact on mariculture carrying capacity of Sanggou Bay:observation and modeling

主要介绍了从动力学研究桑沟湾养殖容量的主要思路、方法及结果。研究以精细过程观测为基础,以数值模型为手段,从物理海洋学角度考察养殖海区水动力特征,研究水动力对物质循环的影响、对颗粒态/溶解态营养物质的补充和对养殖生物量的影响,探寻不同养殖模式效果的技术路线;介绍了两个航次设计方案与目的。通过观测发现养殖对水动力垂直结构有很大影响,底层流速最大并滞后表层,发现弱动力条件下海底颗粒物和营养盐无法进入水体上层的事实。据此提出双边界层动力模型,建立一维数值模型进行机制探讨,将养殖阻力三维化建立水动力数值模型,定量给出养殖对水动力和水交换的阻碍;以此驱动三维养殖生态模型,充分考虑养殖对水动力的影响、水动力对生源要素的输运。建立了一个真正的物理-生物过程耦合模型。利用该模型进行的数值模拟和实验表明,贝藻兼养多元养殖是健康、高效养殖的有利措施;桑沟湾在现有养殖模式下,目前已基本达到了它的养殖容量,养殖品种分布不变,减少养殖密度至目前的0.9倍会略微提高产量,降低成本;减少湾口海带养殖密度,会大幅度提高贝藻兼养区的营养盐总量和养殖生物产量,从海带与贝类经济价值对比会有更高的效益。人为提高水动力混合或许是解决湾内营养盐缺乏的途径。The background and themes of dynamic study on mariculture carrying capacity of Sanggou Bay were described.The method used for this study was based on the fine processes observation,using physical oceanography theory and numerical model to examine the interaction between mariculture and hydrodynamics in Sanggou Bay.Design proposal and purposes for two cruises were introduced.Based on the observation we found that the kelp and the raft influenced the current vertical structure greatly,and the maximum velocity was at the lower layer with strong phase delay.It was also found that the damped current was too weak to mix the sediment detritus and nutrients into the upper layer.Based on these discoveries a double drag-boundary hydrodynamic model was proposed by adding the aquaculture drag at surface.The mechanism of kelp influence on the current profile was studied numerically by a one-dimension model.Considering the kelp drag in the water column besides the boundary drag,a three-dimension hydrodynamic model was adopted to quantify the influence of the aquaculture on hydrodynamics and water exchange of Sanggou Bay.A physical-biological coupled aquaculture ecosystem model was established using DIN,POM concentration and phytoplankton with kelp biomass as variable.The simulation and numerical experiments showed that polyculture was a useful method for healthy and high-efficiency aquaculture.Sanggou Bay has nearly reached its capacity under present aquaculture mode.By cutting down aquaculture density to 0.9 fold of the present density,the total production of kelp will slightly increase and the cost will be reduced.Cutting down the kelp density at the mouth of the bay could greatly enhance the amount of nutrients and biomass in the kelp-bivalve-culture area in the inner side.Artificial mixing might bring more nutrients from seabed in the bay.国家基础研究规划重点项目(2006CB400602);国家重点基金项目(40830854)共同资

戊型肝炎流行区病毒感染的特点

目的　在新的抗体检测试剂基础上了解普通人群戊型肝炎病毒感染特点。方法　利用戊型肝炎病毒多聚化重组抗原组装的抗HEVIgGELISA试剂 (E2 IgG)对山东某地社区普通人群的戊肝感染情况进行检测。结果　本地人群各个年龄组共 2 ,998人中抗HEVIgG抗体总阳性率 (年龄性别标化 )为 14 1% ,男性标化阳性率为 16 2 % ,女性为 11 9%。 2 0岁以下人群戊肝感染率不足 1% ,自 2 0岁起男性和女性分别以每年接近 0 9%和 0 8%的速度平稳上升。戊肝感染者中男性与女性的平均抗体水平基本相同 ,基本上随着年龄的上升 ,人群中感染者的平均抗体水平也缓慢上升。随机选取的 10份E2 IgG阳性血清与抗原的反应均被抗 HEV单克隆抗体明显阻断。结论　该地区为戊肝流行区 ,感染主要发生在成年之后 ,以每年接近 1%的新感染率稳定上升。中小学生中戊肝抗体阳性率极低 ,学校内戊肝暴发的预防应引起高度重视