Results 31 to 40 of about 61,211 (254)

Single-Fiber Reflectance Spectroscopy of Isotropic-Scattering Medium: An Analytic Perspective to the Ratio-of-Remission in Steady-State Measurements

Photonics, 2014
Recent focused Monte Carlo and experimental studies on steady-state single-fiber reflectance spectroscopy (SfRS) from a biologically relevant scattering medium have revealed that, as the dimensionless reduced scattering of the medium increases, the SfRS ...
Daqing Piao, Joel W. Slaton
doaj   +1 more source

Optimization of the Distance between Cylindrical Light Distributors Used for Interstitial Light Delivery in Biological Tissues

Photonics, 2022
Cylindrical light diffusers (CLDs) are often employed for the treatment of large tumors by interstitial photodynamic therapy (iPDT) and photoimmunotherapy (PIT), which involves careful treatment planning to maximize therapeutic dose coverage while ...
Aurélien Gregor, Shohei Sase, Georges Wagnieres   +2 more
doaj   +1 more source

Nonlinear physics of electrical wave propagation in the heart: a review [PDF]

, 2016
The beating of the heart is a synchronized contraction of muscle cells (myocytes) that are triggered by a periodic sequence of electrical waves (action potentials) originating in the sino-atrial node and propagating over the atria and the ventricles ...
Alonso Muñoz, Sergio, Baer, Markus, Echebarría Domínguez, Blas   +2 more
core   +2 more sources

Axon diameters and myelin content modulate microscopic fractional anisotropy at short diffusion times in fixed rat spinal cord

, 2018
Mapping tissue microstructure accurately and noninvasively is one of the frontiers of biomedical imaging. Diffusion Magnetic Resonance Imaging (MRI) is at the forefront of such efforts, as it is capable of reporting on microscopic structures orders of ...
Shemesh, Noam
core   +2 more sources

The brains of aged mice are characterized by altered tissue diffusion properties and cerebral microbleeds

Journal of Translational Medicine, 2020
Background Brain aging is a major risk factor in the progression of cognitive diseases including Alzheimer’s disease (AD) and vascular dementia. We investigated a mouse model of brain aging up to 24 months old (mo).
Erik N. Taylor, Nasi Huang, Jonathan Wisco, Yandan Wang, Kathleen G. Morgan, James A. Hamilton   +5 more
doaj   +1 more source

Aerobic exercise and metformin on intermuscular adipose tissue (IMAT): insights from multimodal MRI and histological changes in prediabetic rats

Diabetology & Metabolic Syndrome, 2023
Background Physical exercise is the first-line intervention for prediabetes, and metformin is the most widely used oral insulin-sensitizing agent. Moreover, intermuscular adipose tissue (IMAT) directly affects insulin resistance by helping maintain ...
Fuyao Yu, Chuan Xing, Yiping Fan, Yanping Liu, Peng Su, Qiuhua Yang, Yanbin Dong, Yang Hou, Shinong Pan   +8 more
doaj   +1 more source

The effects on type 2 diabetes mellitus mouse femoral bone achieved by anti-osteoporosis exercise interventions

Frontiers in Endocrinology, 2022
PurposeExercise therapy and key regulators of bone quality exert anti-hyperglycemic effects on type 2 diabetes mellitus (T2DM) mice. A number of programs have been reported to have an effect on bone disease in T2DM. Major unanswered questions concern the
Miao Zhang, Yuexuan Li, Lifei Liu, Lifei Liu, Mei Huang, Miao Wang, Jun Zou   +6 more
doaj   +1 more source

Negative tension of scroll wave filaments and turbulence in three-dimensional excitable media and application in cardiac dynamics [PDF]

, 2012
Scroll waves are vortices that occur in three-dimensional excitable media. Scroll waves have been observed in a variety of systems including cardiac tissue, where they are associated with cardiac arrhythmias.
Alonso, Sergio, Bär, Markus, Panfilov, Alexander   +2 more
core   +2 more sources

Interleukin-6, age, and corpus callosum integrity. [PDF]

, 2014
The contribution of inflammation to deleterious aging outcomes is increasingly recognized; however, little is known about the complex relationship between interleukin-6 (IL-6) and brain structure, or how this association might change with increasing age.
Bettcher, Brianne M, Busovaca, Edgar, Dutt, Shubir, Green, Ralph, Kramer, Joel H, Lobach, Iryna V, Miller, Bruce L, Miller, Joshua W, Neuhaus, John, Patel, Nihar, Rosen, Howard J, Walsh, Christine M, Watson, Christa L, Yaffe, Kristine   +13 more
core   +4 more sources

Scattered and Fluorescent Photon Track Reconstruction in a Biological Tissue

International Journal of Photoenergy, 2014
Appropriate analysis of biological tissue deep regions is important for tumor targeting. This paper is concentrated on photons’ paths analysis in such biotissue as brain, because optical probing depth of fluorescent and excitation radiation differs.
Maria N. Kholodtsova, Pavel V. Grachev, Tatiana A. Savelieva, Nina A. Kalyagina, Walter Blondel, Viktor B. Loschenov   +5 more
doaj   +1 more source