The posterior sucker of a leech represents a fascinating natural system that allows the leech to adhere to different terrains and substrates. However, the mechanism of adhesion and desorption has not yet to be elucidated. In order to better understand how the adhesion is performed, we analyzed the surface structure, adsorption movements, the muscles' distribution, physical characteristics, and ...

Bacteria-based self-healing concrete has the ability to heal cracks due bacterial conversion of incorporated organic compounds into calcium carbonate. Precipitates seal cracks, theoretically increasing service life constructions. The aim this paper is propose a precursor for bacteria-based derived from waste streams, produced in line with circular economy principle and ideally more affordable t...

The actin cytoskeleton is essential for osteoclasts main function, bone resorption. Two different organizations of actin have been described in osteoclasts, the podosomes belt corresponding to numerous F-actin columns arranged at the cell periphery, and the sealing zone defined as a unique large band of actin. To compare the role of these two different actin organizations, we imaged osteoclasts...

It can be said that lubricants are used to reduce the friction between rubbing surfaces. This is done by separating the moving surfaces with a film of the lubricant, thereby replacing the friction of the metal to metal surfaces by the internal friction within the lubricant itself. Lubricants also act as a cooling agent to carry away heat generated by friction or conducted to the bearing surface...

Soil sealing has negative impacts on ecosystem services since urban green and soil get lost. Although there is political commitment to stop further sealing, no reversal of this trend can be observed in Europe. This paper raises the questions (1) which strategies can be regarded as being efficient toward ecologically sustainable management of urban soil sealing and (2) who has competences and sh...

some agent. This agent is usually water, which can transport the radionuclides in dissolved form or in colloids or small particles. We can therefore establish that a basic characteristic of a safe repository is for it be impermeable, that is, water should not be able to penetrate it. At this stage it is appropriate to consider the physical form in which the waste will be taken to the repository...

The use of macrocapsules in self-healing applications offers a potential benefit by carrying larger amount healing agent comparison with microcapsules. However, the application is still limited to paste and mortar levels on lab-scale. This due concern that most capsules might be broken when mixed concrete components. In this study, cementitious tubular were used they considered as partial repla...

With the increase in drilling fluid density requirements low-pressure coefficient formations, traditional hollow bead fluids and foam each have different degrees of deficiencies. Through extensive indoor experiments, an amphoteric surfactant (cocoamidopropyl betaine) with better foaming performance was selected to formulate ultra-low-density that combines a agent glass microbeads reduce fluid, ...