External loading of phosphorus (P) from agricultural surface discharge (tailwater) is the main cause of excessive algae growth and the eutrophication of the Salton Sea, California. Continuous polyacrylamide (PAM) applications to agricultural irrigation water inflows were evaluated as a means of reducing sediment and P in tailwater. Zero (control) and 1 mg L PAM (PAM1) treatments were compared a...

Abstract Light-weight paper products that contain less fibres, but with a maintained bulk and improved strength properties, are highly desirable due to the low cost of raw materials logistics packaged goods. In this respect, adsorption capacity dry additives onto which is affected by surface charge said very important for development these mechanically robust products. The influence on was inve...

The possibility of usage polymer nanocomposites is being intensively studied today with a purpose their application in medicine, espessialy oncology. At the experimental stage it important to determine mechanisms influence such compounds on body and own possible undesirable effects. Aim – study effect treatment maximal doses dextran-polyacrylamide polymers as carriers silver gold nanoparticles ...

As relatively little information is available on the properties of aspartate aminotransferase from photosynthetic tissue, isolation and characterization of the two major electrophoretically distinct forms of this enzyme from seedling oat leaf homogenates were undertaken. These two forms are designated I for the more anionic form and II for the less anionic form. Form I, 80 to 90% of the total a...

Anionic isoperoxidases from cotton cotyledonary leaf tissue have been purified to electrophoretic homogeneity by chromatography on ion exchange, lectin affinity, and gel filtration matrices. The enzyme was stable and active at a wide range of temperatures with optimal activity at 55°C. Maximum activity was observed when the pH was adjusted from pH 5.5 to pH 7.5. Electrophoresis on sodium dodecy...

Materials which induce molecular motion without external input offer unique opportunities for spatial manipulation of molecules. Here, we present the use of polyacrylamide hydrogel films containing built-in chemical gradients (enthalpic gradients) to direct molecular transport. Using a cationic tertiary amine gradient, anionic molecules were directionally transported up to several millimeters. ...

The identity of a peptidase activity with human serum pseudocholinesterase (PsChE) purified to apparent homogeneity was demonstrated by co-elution of both peptidase and PsChE activities from procainamide-Sepharose and concanavalin-A--Sepharose affinity chromatographic columns; comigration on polyacrylamide gel electrophoresis; co-elution on Sephadex G-200 gel filtration and coprecipitation at d...

Soil erosion leads to environmental degradation and reduces soil productivity. The use of anionic polyacrylamide (PAM) and synthesized biopolymer (BP) using lignin, corn starch, acrylamide, and acrylic acid were tested to evaluate soil erosion, water quality, and growth of Chinese cabbage (Brassica campestris L.). Each treatment of PAM and BP was applied at 200 kg ha(-1) to loamy sand soil and ...

Emulsified water is generally present in crude oil as a result of mixing occurring during production operations. The formation of emulsion leads to problems in production and also transportation. Therefore the need to break oil/water emulsions system through demulsification process using chemical surfactants for improved oil recovery operations. Selected cationic surfactants were effective in s...

We examined mechanisms that protect host defense cells from their cytotoxic effector molecules. Human neutrophil peptides (HNP) 1-3 are microbicidal and cytotoxic defensins, initially synthesized as 94-amino acid preproHNP(1-94), cotranslationally proteolyzed to proHNP(20-94), then converted by removal of the anionic propiece to mature HNP(65-94)(HNP-1 and -3) and HNP(66-94) (HNP-2). We hypothe...