QUES: It must be said at this point that it is only the principles that are repeated each fresh cycle being a new variation of the experience of darkness and light

correct the punctuation.

CORRECTED: It must be said at this point that it is only the principles that are repeated, each fresh cycle being a new variation of the experience of darkness and light.

QUES: While HFUS has been utilized for lymph node imaging in a number of mouse model systems a detailed protocol describing HFUS imaging and characterization of the cervical lymph nodes in mice has not been reported

correct the punctuation.

CORRECTED: While HFUS has been utilized for lymph node imaging in a number of mouse model systems, a detailed protocol describing HFUS imaging and characterization of the cervical lymph nodes in mice has not been reported.

QUES: Luminance difference Indicates the transition between light and dark surfaces

correct the punctuation.

CORRECTED:
Luminance difference Indicates the transition between light and dark surfaces.