You should not identify the philosophical bases of science with the general massif of philosophical knowledge. From a big field of a philosophical perspective and versions of its decisions arising in culture of each historical era, the science uses only some ideas and the principles as the proving structures. The philosophy is not a reflection over science. It - a reflection over the bases of all culture. Its task includes the analysis under a certain point of view not only sciences, but also other aspects of human life - the analysis of sense of human life, justification of a desirable way of life, etc. Discussing and solving these problems, the philosophy develops also such categorial structures which can be used in science.
For science important not only existence in the sphere of philosophical knowledge of the corresponding era of a necessary range of ideas and principles, but also opportunity by selective loan of the corresponding categorial schemes, ideas and the principles to turn them into the philosophical bases.