农村医师专业实验诊断学实践教学改革过程中的体会及探讨

目的：探讨传统教学法和多媒体教学法两种教学方法在农村医师专科实验诊断学实践教学中的应用及比较。方法：在实验诊断实验教学过程中,通过对农村医师专科2011-9班采用传统教学法,对农村医师专科2011-7班采用多媒体教学法,并应用统计学方法对两个班的实验考试平均成绩和及格率进行比较和分析。结果：农村医师专业2011-9班的平均成绩为75.65分,2011-7班平均成绩为84.44分。对平均成绩进行F检验,F=1.12,P〉0.10,方差齐,故可用两样本t检验,t=5.36,P〈0.01;农村医师专科2011-9班的及格率为68.09%,农村医师专科2011-7班的及格率为86.37%,X2=4.49,P〈0.05。采用多媒体教学法的农村医师专科2011-7班的平均成绩和及格率明显高于采用传统教学法的农村医师专科2011-9班。结论：在农村医师专科实验诊断学实验教学中,多媒体教学法跟传统教学法比具有明显的优势。     

末次冰期南海巽他陆架上的植被和气候——17962孔孢粉记录

提供了南海大陆坡上17962孔深海沉积物的孢粉记录.该孔长8 m,底部14C年龄为30 000 a BP,跨越了深海氧同位素3期、末次冰期、冰消期和全新世几个地质历史阶段.孢粉记录显示末次冰期低海面时南海南部出露的陆架上覆盖了低地雨林.同时,在邻近的岛屿上山地雨林扩张,表明气候比现在凉,但是没有变干的迹象.冰消期植被和气候都经历了快速变暖和变凉的波动.全新世时,红树林和低地雨林的扩张以及孢粉沉积率的明显降低均表明气候变暖,海面上升,大陆架被淹没.     

Immobilization of urease within a thin channel ultrafiltration cell

Urease [urea amidohydrolase, EC 3.5.1.5] has been immobilized within a thin channel ultrafiltration cell. Loss of enzymic activity as a result of concentration polarization and other causes was minimized. The flow characteristics of the reactor were fully characterized by analysis of the distribution of residence times (using F diagrams) and kinetic data were also obtained for the immobilized enzyme. These data show that under certain conditions the thin channel ultrafiltration reactor can be considered to be an ideally mixed vessel. After almost 8 days of continuous operation it was found that 15% of the original enzyme activity remained.     

Effective Protection of the Marine Environment and Equitable Benefit Sharing in the Area: Empty Promises or Feasible Goals?

abstract

The international legal framework with regard to “the Area,” comprising the deep seabed and the subsoil beyond the boundaries of national jurisdiction, has been modified significantly through the years. It was first established by part XI of the United Nations Convention on the Law of the Sea, but the 1994 Implementation Agreement introduced several changes. These general rules and principles are further developed in the “Mining Code,” referring to the comprehensive set of regulations and procedures issued by the International Seabed Authority. The Authority has already produced rules for the first phases of mining activities (prospecting and exploration) in the Area, but has yet to adopt exploitation regulations. Nevertheless, the most recent draft of the exploitation regulations provides a good indication of the current state of play. This article analyzes the current draft of the exploitation regulations, which will shape the future deep seabed mining regime, in order to evaluate whether the relevant provisions are sufficient and effective to attain two prominent goals with regard to the Area: the protection of the marine environment and the equitable sharing of financial and economic benefits. The Law of the Sea Convention indeed states that the resources of the deep seabed are considered common heritage of mankind and prioritizes these objectives. Therefore, the exploitation regulations should strike an appropriate balance between commercial exploitation, environmental protection, and the interests of developing countries. The strengths and weaknesses of this document and the overarching international legal framework are identified and possible corrections are suggested.