Results 101 to 110 of about 898,461 (305)

The effect of diffusion on giant pandas that live in complex patchy environments

Nonlinear Analysis, 2015
The habitat loss and fragmentation is almost the greatest threat to the survival of the wild giant panda. In this paper, we construct a mathematical model to consider the effect of diffusion on giant pandas that live in complex patchy environments.
Xiangyun Shi, Guohua Song, Zeyu Li
doaj   +1 more source

Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405

, 2005
We present an optical-to-X-ray spectral analysis of the afterglow of GRB 020405. The optical spectral energy distribution not corrected for the extragalactic extinction is significantly below the X-ray extrapolation of the single powerlaw spectral model ...
Antonelli, L. A., Conciatore, M. L., Fiore, F., Lazzati, D., Perna, R., Stratta, G.   +5 more
core   +1 more source

Small Extracellular Vesicles from Neural Cells: Physiological and Pathological Roles, and Potential in Neurodegenerative Therapy

Advanced Healthcare Materials, EarlyView.
Neural cell–derived small extracellular vesicles (sEVs) are emerging as pivotal mediators in neurodegenerative diseases, exerting both pathogenic and therapeutic functions. This review synthesizes current evidence on how sEVs from distinct neural cell types regulate neurodegeneration, neuroprotection, biomarker discovery, and targeted drug delivery ...
Muhammad Waqas Salim, Wei Zhang, Lyndsey Collins‐Praino, Yuling Wang, Andrew Care   +4 more
wiley   +1 more source

Extinction Laws toward Stellar Sources within a Dusty Circimstellar Medium and Implications for Type Ia Supernovae

, 2016
Many astronomical objects are surrounded by dusty environments. In such dusty objects, multiple scattering processes of photons by circumstellar (CS) dust grains can effectively alter extinction properties.
Maeda, K., Nagao, T., Nozawa, T.
core   +1 more source

Nanotherapies for Atherosclerosis: Targeting, Catalysis, and Energy Transduction

Advanced Healthcare Materials, EarlyView.
Atherosclerosis management is hindered by poor drug targeting and plaque heterogeneity. Nanotechnology overcomes these barriers via three core strategies: (1) target‐engineered nanocarriers that achieve lesion‐specific precision via ligand modification, biomimetic camouflage, stimuli‐responsive release, and self‐propelling nanomotors; (2) catalytic ...
Yuqi Yang, Jingguo Qu, Tonghuan Xiao, Xinyang Han, Michael Tin‐Cheung Ying   +4 more
wiley   +1 more source

A stochastic model for the transmission dynamics of hepatitis B virus

Journal of Biological Dynamics, 2019
In this paper, we formulate a stochastic model for hepatitis B virus transmission with the effect of fluctuation environment. We divide the total population into four different compartments, namely, the susceptible individuals in which the disease ...
Tahir Khan, II Hyo Jung, Gul Zaman
doaj   +1 more source

Oxygen Supply of Islets of Langerhans by Photosynthetically Active Microalgae in Bioprinted Co‐Cultures Maintains Their Function in a Hypoxic Environment

Advanced Healthcare Materials, EarlyView.
This study developed a bioprinted co‐culture system embedding rat pancreatic islets and Scenedesmus sp. microalgae spatially defined in close vicinity. Red light was found optimal to ensure microalgal photosynthesis while maintaining islet viability and functionality. A tailored co‐culture medium supported both cell types.
Finn Dani, Sarah Duin, Ashwini Rahul Akkineni, Susann Lehmann, Barbara Ludwig, Michael Kühl, Michael Gelinsky, Anja Lode   +7 more
wiley   +1 more source

How homogeneous is West Coast Renosterveld? Implications for con­servation

Bothalia: African Biodiversity & Conservation, 2010
In this paper, we test two published assumptions about West Coast Renosterveld, a highly fragmented vegetation type in South Africa. The first is that it is a homogeneous vegetation type.
I. P. Newton, R. S. Knight
doaj   +1 more source

Angular diameters, fluxes and extinction of compact planetary nebulae: further evidence for steeper extinction towards the Bulge

, 2004
We present values for angular diameter, flux and extinction for 70 Galactic planetary nebulae observed using narrow band filters. Angular diameters are derived using constant emissivity shell and photoionization line emission models.
A. A. Zijlstra, Acker, Balick, Bedding, Bensby, Boulares, Cahn, Cardelli, Caswell, D. Minniti, Dorschner, Dudziak, Durand, F. Comeron, Gray, Greenberg, Hamuy, Heiles, J. R. Walsh, K. Gesicki, Kimura, Koppen, Larson, Larson, Li, Lucy, M. D. Gray, Minniti, P. M. E. Ruffle, Popowski, Pottasch, Pottasch, Reid, Richardson, Scott, Stasinska, Tylenda, Tylenda, Udalski, Udalski, Van Hoof, Walton, Zijlstra   +42 more
core   +2 more sources

Integrated Visible Light and Oxidant Protection Through Multifunctional Sunscreens

Advanced Healthcare Materials, EarlyView.
High‐energy visible radiation (HEVR), although less energetic than UV light, penetrates deeper into the skin and contributes to photoaging, pigmentation disorders, and oxidative stress. The development of new HEVR‐targeted filters, therefore, represents not only a scientific challenge but also a pressing public health and cosmetic industry need.
Beatriz Peñín, Raúl Losantos, Ignacio Funes‐Ardoiz, Diego Sampedro   +3 more
wiley   +1 more source