Polyethyleneimine An Overview Sciencedirect Topics

Polyethyleneimine - an overview | ScienceDirect Topics.

Polyethyleneimine (PEI), an organic polyamine polymer, is one of the most prominent examples of cationic polymers capable of gene transfection in vitro and in vivo into various cell lines and tissues (Fig. 8.7).PEI was also applied in different fields from gene therapy and several studies have emphasized the importance of this polymer in medicinal chemistry..


Microencapsulation - an overview | ScienceDirect Topics.

F. Fu, L. Hu, in Advanced High Strength Natural Fibre Composites in Construction, 2017 15.4.1 Microencapsulation mechanisms. Microencapsulation is the protective technology of encapsulating solid, liquid or gas materials into micro particles with a diameter of 1-1000 um, and has been widely used in fields of medicine, cosmetics, food, textile and advanced ....


Water Filtration - an overview | ScienceDirect Topics.

N. Mao, in Advances in Technical Nonwovens, 2016 10.4.2 Nonwoven water filters. Water filtration is the process of removing or reducing the concentration of particulate matter, including suspended particles, parasites, bacteria, algae, viruses, and fungi, as well as other undesirable chemical and biological contaminants from contaminated water to produce safe and clean ....


Critical Micelle Concentration - an overview | ScienceDirect Topics.

In Figure 35 the diffusion coefficient of AOT-water in n-heptane at four different ratios, W- C H 2 O /C AOT, measured by Costantino et al. are shown [173].For all the W ratios except W = 0.54, the diffusion coefficients decrease and they seem to pass through a minimum as the concentration of the surfactant is raised. It is worth noting that at W = 10.08 the trend in the diffusion ....


Dental Composite Resin - an overview | ScienceDirect Topics.

Jan 18, 2012 . Mrinal Bhattacharya, Wook-Jin Seong, in Nanobiomaterials in Clinical Dentistry, 2013. 3.5.1 Dental restorative materials. Dental composite resin is a tooth-colored restorative material used to replace a decayed portion of tooth structure. Its esthetic appearance is the main advantage over the conventional dental amalgam. Typical composite resin is composed of a ....


Nanofiltration membranes review: Recent advances and ... - ScienceDirect.

Jan 15, 2015 . For TiO 2, recent study reported on the fabrication of NF composite membranes with polyethyleneimine-nanoparticle hybrid active layer through mineralization.Inorganic precursors such as tetraethoxysilane (TEOS) and tetra-n-butyl titanate (TBOT) were applied respectively in the preparation of PEI-silica and PEI-titania composite membranes .The ....


Biological oxidation methods for the removal of organic and ….

The optimal operating parameters such as temperature and pH, which usually lead to the best performance, were presented. A detailed overview of the different combination processes was also given, including bio-oxidation in coincident or consecutive combination with adsorption, advanced oxidation processes, and membrane separation..


Lipase immobilization via cross-linked enzyme aggregates: ….

Lipases require no cofactors and in general can be used in wide pH and temperature ranges , , they recognize a wide variety of substrates but may present a high specificity (e.g., enantio-specificity) and regio- and enantio-selectivity .Such wide variety of performance in different types of reactions, in addition to their wide specificities, allows applying lipases to obtain countless ....