The echo statistics associated with a randomly oriented prolate spheroid randomly located in the sonar beam are modeled. The cases of a smooth and rough spheroid, both in the water column (i.e., case in which boundaries are not involved), and on a boundary are investigated. The modeling begins with the analytical physics-based expression for the scattering amplitude of a smooth prolate spheroid...

We describe a program of star counts in the range 19 ∼< I ∼< 26 made with the WFPC cameras aboard the Hubble Space Telescope. Red (V − I > 1.0) stars at these magnitudes are primarily disk and spheroid M dwarfs. The stars are found both on dedicated images as part of the parallel program and by using appropriate archive data. We measure the faint end of the luminosity functions of the disk and ...

The effect of an intravenous injection of squid-ink (sepia-melanin) solution on adult mouse spheroid alveolar epithelial cells was observed by the electron microscope. Sepia-melanin particles were seen in all alveolar wall cells examined that seems to suggest the entrance of sepia-melanin particles into the spheroid alveolar epithlial cells from the alveolar blood capillary. In cases of large p...

background: radiotherapy is an established therapeutic modality for prostate cancer. resveratrol, a natural antioxidant, has been shown to inhibit carcinogenesis and to block the process of tumor initiation and progression. no data is available on the response of cellular spheroid to reseveratol. in this study we have examined the effect of resveratol on the radiation response of human prostate...

background: the purpose of this study was to investigate the enhanced thermal resistance mechanism of the du145 tumor spheroid cultures as compared to the prostate carcinoma cell line's monolayer cultures. materials and methods: du145 cells were cultured either as spheroids or monolayers. cultures were treated with hyperthermia in a precision water bath (at 43°c for 60 minutes) and/or quercetin...

This paper reports the results of lattice Boltzmann simulations of the rotation behaviour of neutrally buoyant spheroidal particles in a three-dimensional Couette flow. We find several distinctive states depending on the Reynolds number range and particle shape. As the Reynolds number increases, rotation may change from one state to another. For a prolate spheroid, two rotation transitions are ...

BACKGROUND Recently, tumor initiating cells (TICs), which possess self-renewal and other stem cell properties, are regarded as the cause of tumor initiation, recurrence and metastasis. The isolation and identification of TICs could help to develop novel therapeutic strategies. METHODS In this study, we isolated spheroid cells from human renal cell carcinoma (RCC) cell line SN12C in stem cell-...

Multicellular spheroids are an established system for three-dimensional cell culture. Spheroids are typically generated using hanging drop or non-adherent culture; however, an emerging technique is to use magnetic levitation. Herein, mesenchymal stem cell spheroids were generated using magnetic nanoparticles and subsequently cultured within a type I collagen gel, with a view towards developing ...

many cell lines, when cultured under proper conditions, can form three dimensionalstructures called multicellular spheroids. these spheroids resemble in vivo tumor models in severalaspects. therefore, studying growth characteristics and behavior of spheroids is beneficial inunderstanding the behavior of tumors under various experimental conditions. in this work, we havestudied the growth proper...

Researchers have observed that response of tumor cells to treatment varies depending on whether the cells are grown in monolayer, as in vitro spheroids or in vivo. This study uses data from the literature on monolayer treatment of SK-N-SH neuroblastoma cells with 15-deoxy-PGJ2 and couples it with data on growth rates for untreated SK-N-SH neuroblastoma cells grown as multicellular spheroids. A ...