Results 21 to 30 of about 638,495 (263)

Detection of geological boundaries by 3D gravity inversion for density gradients in different directions

Frontiers in Earth Science, 2022
The spatial position and dip feature of the density boundary are significant to the study of fault and tectonic frameworks. Edge detection methods generally attach importance to the horizontal position of the boundary, but it is difficult to determine ...
Lei Jing, Lei Jing, Yabin Yang, Yabin Yang, Changli Yao, Longjun Qiu, Longjun Qiu, Deyuan Chen, Deyuan Chen, Menglong Xu, Menglong Xu   +10 more
doaj   +1 more source

The efficacy of density gradients for islet purification: a comparison of seven density gradients

Transplant International, 1990
Seven different density gradient-forming materials were compared as to their efficacy for rat islet purification. Continuous density gradients were used in order to determine the bouyant densities of the different pancreatic tissue components. Hand-picked islets served as a control.
van Suylichem, P.T.R, Wolters, G.H.J, van Schilfgaarde, R   +2 more
openaire   +4 more sources

Spatial Matrices of Urban Expansion in Lafia, North-Central Nigeria

Forum Geografi, 2023
Rapid urbanisation in African cities has caused considerable problems by hindering their ability to meet infrastructure and service needs, resulting in rising land-use consumption.
Samuel Medayese, Hangwelani Hope Magidimisha-Chipungu, Lovemore Chipungu   +2 more
doaj   +1 more source

Mass Purification Protocol for Drosophila melanogaster Wing Imaginal Discs: An Alternative to Dissection to Obtain Large Numbers of Disc Cells

Biology, 2022
Drosophila melanogaster imaginal discs are larval internal structures that become the external organs of the adult. They have been used to study numerous developmental processes for more than fifty years. Dissecting these imaginal discs for collection is
Marion Hoareau, Juliette de Noiron, Jessie Colin, Isabelle Guénal   +3 more
doaj   +1 more source

Boiling Heat Transfer in Copper Foam Bilayers in Positive and Inverse Gradients of Pore Density [PDF]

Journal of Applied Fluid Mechanics, 2023
Gradient metal foam is an advanced heat transfer material that decreases resistance to bubble escape and enhances the transfer of boiling heat. In this study, boiling heat transfer and bubble behavior were studied in an experimental set-up with copper ...
H. Wang, Q. F. Ying, E. Lichtfouse, C. G. Huang   +3 more
doaj   +1 more source

Metrizamide, a new density‐gradient medium [PDF]

FEBS Letters, 1975
1. Introduction Isopycnic centrifugation has proved to be an extremely versatile technique for the fractionation of biological materials. However, there are some restric- tions on its use, mainly because of the physical and chemical characteristics of the compounds used to form the density gradients.
Rickwood, D., Birnie, G.D.
openaire   +2 more sources

Characteristics of plasma boundaries with large density gradients and their effects on Kelvin–Helmholtz instability

Frontiers in Astronomy and Space Sciences
Boundaries between space plasmas occur in numerous contexts and scales, from astrophysical jets to planetary magnetospheres. Mass and momentum transport across boundaries poses a fundamental problem in magnetospheric physics. Kelvin–Helmholtz instability
K. Seki, Y. Matsumoto, N. Terada, T. Hara, D. A. Brain, H. Nakagawa, J. P. McFadden, J. S. Halekas, S. Ruhunusiri, D. L. Mitchell, L. Andersson, J. R. Espley, D. N. Baker, J. G. Luhmann, B. M. Jakosky   +14 more
doaj   +1 more source

Design and fabrication of a microfluidic device for separation of lymphocytes for use as part of a radiation biodosimeter

Engineering and Applied Science Research, 2022
A radiation biodosimeter is a measure of biological response to radiation that can help determine the exact dose received by using biological markers or radiation-damaged chromosomes using a blood sample as a surrogate tissue. Today, many researchers are
Jutima Yodyiumyuth, Witsaroot Sripumkhai, Norabadee Ranron, Pattaraluck Pattamang, Wanwisa Sudprasert   +4 more
doaj  

Can Microfluidics Improve Sperm Quality? A Prospective Functional Study

Biomedicines
The same sperm selection techniques in assisted reproduction clinics have remained largely unchanged despite their weaknesses. Recently, microfluidic devices have emerged as a novel methodology that facilitates the sperm selection process with promising ...
Fernando Meseguer, Carla Giménez Rodríguez, Rocío Rivera Egea, Laura Carrión Sisternas, Jose A. Remohí, Marcos Meseguer   +5 more
doaj   +1 more source

Heparin Anticoagulant for Human Bone Marrow Does Not Influence In Vitro Performance of Human Mesenchymal Stromal Cells

Cells, 2020
Mesenchymal stromal cells (MSCs) are a promising cell source for tissue engineering and regenerative medicine. In our lab, we found that MSC preparations from bone marrow of many different donors had a limited capacity of in vitro differentiation into ...
Yvonne Roger, Laura Burmeister, Anika Hamm, Kirsten Elger, Oliver Dittrich-Breiholz, Thilo Flörkemeier, Andrea Hoffmann   +6 more
doaj   +1 more source