Polymer solution has extremely extensive applications in many natural and industrial processes, especially oilfield development field, such as polymer flooding, fracturing water shut-off. Thus, the study of flow behaviors formation pores is significantly important. In this paper, droplets 3-D pore throat structure were systematically studied. Additionally, influencing factors (polymer concentra...

The creation of novel bone substitutes requires a detailed understanding of the interaction between cells and materials. This study was designed to test certain polymers, specifically poly(caprolactone) (PCL), poly(D,L-lactic-CO-glycolic acid) (PLGA), and combinations of these polymers for their ability to support bone marrow stromal cell proliferation and differentiation. Bone marrow stromal c...

The major N-containing polymer compounds in the body include protein, RNA, and DNA. The endogenous gastrointestinal secretions as well as the portal-drained visceral and peripheral immune responses are basic physiological functions. Elevated endogenous secretions and immune activities, as affected by developmental stages, diets, and management factors, decrease the availability of dietary nutri...

Alkaline polyelectrolyte fuel cell now receives growing attention as a promising candidate to serve as the next generation energy-generating device by enabling the use of non-precious metal catalysts (silver, cobalt, nickel et al.). However, the development and application of alkaline polyelectrolyte fuel cell is still blocked by the poor hydroxide conductivity of anion exchange membranes. In o...

The DFLU numerical flux was introduced in order to solve hyperbolic scalar conservation laws with a flux function discontinuous in space. We show how this flux can be used to solve systems of conservation laws. The obtained numerical flux is very close to a Godunov flux. As an example we consider a system modeling polymer flooding in oil reservoir engineering. Key-words: Finite volumes, finite ...

The hydrolytic action of snake venom phosphodiesterase on poly(adenosine diphosphate ribose) was investigated in comparison with that of rat liver phosphodiesterase. The purified polymer, labeled with s2P or 14C, was partially hydrolyzed with snake venom phosphodiesterase and passed through a Sephadex G-50 column. The resulting elution profiles showed the existence of degradation products with ...

Most of Indonesia’s oil field has been producing the for long period time. For this reason, enhanced recovery (EOR) method becomes most promising to improve production country. Chemical flooding, especially polymer flooding is simplest and commonly applied chemical technique, since it can be used after water process. Screening considered first step in evaluating selecting potential polymers res...

Introduction: Polymer injection has been used in reservoirs to alleviate contrasting permeability zones to enhance oil recovery (EOR). Polymer technology relies mainly on the use of polyacrylamides cross-linked by a hazardous metal or organic. Contemporary polymer plugging has investigated the stimulation of in-situ microorganisms to produce polymers (Jenneman et. al., 2000) and the use of bioc...