Objectives To establish an evaluation index system for general hospital's sustainable innovation ability of science and technoloby and determine the index weight. Methods Firstly, the theory of scientific and technological innovation was discussed based on the systematic analysis of the related facts from the documents. Secondly, a set of targets was drafted with methods of work breakdown structure (WBS), classification and combination from references to many other studies of science and technology evaluation, and then revised by experts who are familiar with the subject. Thirdly, the weight of each target was decided through Analytical Hierarchy Process (AHP) and questionnaires. Results A systematic and comprehensive evaluation system of the general hospital's sustainable innovation ability of science and technology, comprised 3 first-level indicators, 15 second-level indicators and 37 third-level indicators, which were proved reliable by consistency check. The weights of each indicator were also defined. Conclusions The evaluation system comprises both qualitative and quantitative indicators. The indicators not only reflect the performance of a period, but also reflect the sustainability of large general hospitals' scientific and technological innovation ability. By using the scientific consultation, analysis and statistics, the evaluation system is proved to be valid and reliable.

Objective To evaluate the sustainable innovative ability of science and technology (S &T) of four large general hospitals from three different regions of China(Chongqing, Shaanxi and Hunan) with an evaluation system. Method The data collected were processed with normalization method. The evaluation models were established and varied in design to reflect either the dynamic trends or the levels of innovative abilities in different hospitals. Results Hospital A, B and D took on an ascending trend in sustainable S & T ability for innovation, while hospital C showed a descending trend in recent years. Overall, hospital A and D had a stronger sustainable S & T ability for innovation than hospital B and C. Conclusion The eval-uation system established is able to reflect the levels and trends of sustainable S & T innovative ability of the selected hospitals, which is in accordance with the actual situations, and is therefore scientific and feasible.It could provide reference for hospital S & T administrators to make decisions and is favorable to the sustainable development of hospital's S & T innovative ability.

Objective: To determine the changes of fatty acids composition of eel oil after refining processes. Methods: The composition of fatty acids was determined by GC-MS. Results: The purity of eel oil was increased and the content of high-unsaturated fatty acids was not influenced after deodorization by water vapor distillation at 180 ℃ and 0.01 MPa. Its nutritive value was increased, while its purity and content of unsaturated fatty acids were further increased after winterization at 10 ℃. Its quality, especially unsaturated fatty acids, distinctly decreased after water vapor distillation at 227 ℃ and 0.01 MPa.Conclusion: The nutritive value of eel oil is increased after refining processes of water vapor distillation at 180 ℃ and 0.01 MPa, and winterization at 10 ℃.