求翻译：之后也有相当多的研究工作[15-19]对溶菌酶的热变性过程做了较深入的研究，然而由于蛋白质变性受溶液环境变化（如pH、离子强度等）的影响较大，但不同研究组得到的结论差别较大。是什么意思？

After a considerable number of studies [15-19] to do a more in-depth study of the thermal denaturation process of lysozyme, however, due to protein denaturation by the solution of environmental change (such as ph, ionic strength, etc.) influence, but different studies group to get the conclusion.

It has also been a considerable number of studies [ 15- 19] soluble bacterial enzymes to the hot transsexual process is done in more depth in the study, however, since the protein denaturalization solution pH environmental changes (e.g. , ion intensity, and so forth) are more affected by different r

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There are a considerable number of research work after [15-19] during the thermal denaturation of lysozyme doing more in-depth research, however, due to environmental changes of protein denaturation solution (such as pH, ionic strength, and so on) a greater impact, but received by the different rese

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