Spectrophotometric analysis is one of the most common techniques used to quantitate nucleic acids in a solution. More specifically, 260/280 UV absorbance ratio acid can be determine their purity [1]Huss VAR, Festl, H, Schleifer KH. Studies on spectrophotometric determination DNA hybridization from renaturation rates. Syst. Appl. Microbiol. 1983; 4(2), 184–192. . However, traditional fixed-pathl...

Abstract Background Previous research demonstrated that manipulation of the extremities was associated with changes in multisegmental postural sway as well improvement a lower extremity balancing task. We were interested if these effects would extend to an upper Our aim this study investigate whether could influence dual task performance where explicit suprapostural water filled tube frontal pl...

Near-infrared spectroscopy (NIRS) is a noninvasive method of quantifying changes in cerebral haemodynamics from changes in the absorption of near-infrared light by oxyhaemoglobin and deoxyhaemoglobin. Measurement of neonatal cerebral blood volume (CBV) by NIRS was described in 1990 but it has been suggested that, in adults, scalp and skull blood content contribute a significant amount to the ce...

Diffuse near-infrared tomography of tissue can provide intrinsically useful information about total hemoglobin, oxygen saturation, water and cytochromes within tissue, yet to extract this information spectral data is required at many wavelengths. In this study, we examine a new approach to using multispectral continuous wave measurements through tissue along with second-derivative data analysis...

An image processing algorithm is presented to reconstruct optical pathlength distributions from images of nonabsorbing weak phase objects, obtained by a differential interference contrast (DIC) microscope, equipped with a charge-coupled device camera. The method is demonstrated on DIC images of transparent latex spheres and unstained bovine spermatozoa. The images were obtained with a wide-fiel...

Laser frequency noise is a significant noise source which couples into the main science measurement of the Laser Interferometer Space Antenna via the mismatch between the interferometer arm lengths. In this paper we discuss the application of an unequal pathlength heterodyne Mach–Zehnder interferometer to measure and actively stablize the master laser frequency as used in LISA Pathfinder. In co...

We present a fiber-optic low-coherence imaging technique, termed spectral-domain differential interference contrast microscopy (SD-DIC), for quantitative DIC imaging of both reflective surfaces and transparent biological specimens. SD-DIC combines the common-path nature of a Nomarski DIC interferometer with the high sensitivity of spectral-domain low-coherence interferometry to obtain high-reso...