scholarly journals Studying the surface properties of high-molecular-weight membranes obtained by radiation polymerization

2019 ◽  
Author(s):  
Valentina Sokhoreva ◽  
Akbota Dyussembekova ◽  
Vladimir Golovkov ◽  
Thorsteinn Sigfusson ◽  
Olga Korneva ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Surface Properties ◽  
Radiation Polymerization

Corrosion Wear Characteristics of ELID-Ground Co-Cr Alloy with Applying Abrasion by Ultra High Molecular Weight Polyethylene (UHMWPE)

2011 ◽  
Vol 325 ◽  
pp. 201-207 ◽  
Author(s):  
M. Mizutani ◽  
Noriyuki Hisamori ◽  
T. Mizuno ◽  
A. Ezura ◽  
I. Ohuchi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Surface Properties ◽  
Corrosion Behavior ◽  
Corrosion Wear ◽  
Workpiece Surface ◽  
Wear Characteristics ◽  
Elid Grinding ◽  
Modified Layer ◽  
Ultra High Molecular Weight

The purpose of this paper is to evaluate the surface properties and corrosion behavior of Co-Cr alloys ground by employing Electrolytic In-process Dressing (ELID) grinding; this evaluation was carried out by abrading the alloy surfaces using ultra high molecular weight polyethylene (UHMWPE). The evaluation results showed that ELID grinding can be used to perform mirror finishing on Co-Cr alloys. ELID grinding also showed its ability to create a stable modified layer which improves corrosion wear characteristics on the workpiece surface.

scholarly journals Development of surface properties of ultra-high-molecular-weight polyethylene film using side-chain crystalline block copolymers

2020 ◽  
Vol 40 (3) ◽  
pp. 231-236 ◽  
Author(s):  
Sho Hirai ◽  
Shoichi Ishimoto ◽  
Patchiya Phanthong ◽  
Shigeru Yao
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
High Molecular Weight ◽  
Surface Properties ◽  
Functional Unit ◽  
Side Chain ◽  
Adhesive Properties ◽  
High Adhesion ◽  
Adhesion Contact ◽  
Ultra High Molecular Weight

AbstractUltra-high-molecular-weight polyethylene (UHMWPE) has been widely used in industry; however, the applications for UHMWPE are limited because of low hydrophilic and adhesive properties. Herein, we developed the surface properties of UHMWPE by using side-chain crystalline block copolymers (SCCBCs), which consist of a side-chain crystalline unit and a functional unit. This process only required immersing the UHMWPE film in the diluted SCCBC solution, which enabled the UHMWPE surface to be coated homogeneously. The results of the contact angle and tensile shear test showed that the surface of UHMWPE modified with SCCBC was improved in hydrophilicity and adhesive properties. In addition, high adhesion strength was measured on UHMWPE surfaces dipped in a SCCBC solution at high temperature with the UHMWPE film becoming elongated at all parts other than the adhesion contact area.

The skin migratory stage of the schistosomulum ofSchistosoma mansonihas a surface showing greater permeability and activity in membrane internalisation than other forms of skin or mechanical schistosomula

Parasitology ◽  
2015 ◽  
Vol 142 (9) ◽  
pp. 1143-1151 ◽  
Author(s):  
WANDER DE JESUS JEREMIAS ◽  
JOSE RENAN DA CUNHA MELO ◽  
ELIO HIDEO BABA ◽  
PAULO MARCOS ZECH COELHO ◽  
JOHN ROBERT KUSEL
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Surface Properties ◽  
Lucifer Yellow ◽  
Mouse Skin ◽  
Membrane Vesicles ◽  
New Host ◽  
Internal Membrane

SUMMARYSkin schistosomula can be prepared by collecting them after isolated mouse skin have been penetrated by cercariaein vitro. The schistosomula can also migrate out of isolated mouse skin penetrated by cercariaein vitroand from mouse skin penetrated by cercariaein vivo. Schistosomula can also be produced from cercariae applied through a syringe or in a vortex. When certain surface properties of the different forms of schistosomula were compared, those migrating from mouse skin penetrated by cercariaein vivoorin vitrohad greatly increased permeability to membrane impermeant molecules such as Lucifer yellow and high molecular weight dextrans. These migrating forms also possessed surfaces which showed greatly enhanced uptake into internal membrane vesicles of the dye FM 143, a marker for endocytosis. This greatly enhanced activity and permeability of the surfaces of tissue migrating schistosomula is likely to be of great importance in the adaptation to the new host.

Effect of Electron Beam Treatment in Air on Surface Properties of Ultra-High-Molecular-Weight Polyethylene

2016 ◽  
Vol 36 (3) ◽  
pp. 440-448 ◽  
Author(s):  
Irina Yu. Grubova ◽  
Maria A. Surmeneva ◽  
Vladimir V. Shugurov ◽  
Nikolay N. Koval ◽  
Irina I. Selezneva ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Electron Beam ◽  
High Molecular Weight ◽  
Surface Properties ◽  
Electron Beam Treatment ◽  
Ultra High Molecular Weight

Microtubule motors and other maps

1990 ◽  
Vol 48 (3) ◽  
pp. 1-1
Author(s):  
Richard B. Vallee
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Cytoplasmic Dynein ◽  
Organelle Transport ◽  
Structural Components ◽  
Microtubule Associated Proteins ◽  
Microtubule Motors ◽  
Associated Proteins ◽  
The Subject ◽  
Intracellular Motility

Microtubules are involved in a number of forms of intracellular motility, including mitosis and bidirectional organelle transport. Purified microtubules from brain and other sources contain tubulin and a diversity of microtubule associated proteins (MAPs). Some of the high molecular weight MAPs - MAP 1A, 1B, 2A, and 2B - are long, fibrous molecules that serve as structural components of the cytamatrix. Three MAPs have recently been identified that show microtubule activated ATPase activity and produce force in association with microtubules. These proteins - kinesin, cytoplasmic dynein, and dynamin - are referred to as cytoplasmic motors. The latter two will be the subject of this talk.Cytoplasmic dynein was first identified as one of the high molecular weight brain MAPs, MAP 1C. It was determined to be structurally equivalent to ciliary and flagellar dynein, and to produce force toward the minus ends of microtubules, opposite to kinesin.

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