Low concentrations of synthetic- or bio-polymers in irrigation water can nearly eliminate sediment, N, ortho- and total-P, DOM, pesticides, micro-organisms, and weed seed from runoff. These environmentally safe polymers are employed in various sensitive uses including food processing, animal feeds, and potable water purification. The most common synthetic polymer is anionic, high purity polyacr...

Biopolymers from a group of polysaccharides are used in treatments enhancing sowing material crops due to their physical and chemical properties, susceptibility modification, biodegradability high bioactivity. Natural polymers, such as: chitosan, alginian, celulose, galaktoglucomannans, lignin gellan gum, can be as binders seed coating or carriers active substances microorganisms. Moreover, bio...

To obtain some information of the biological action of Kankohso 101dinicotinate and Kankohso 301-nicotinate, observations were made on the binding mode of these substances with protein, chondroitin sulfate and nucleic acids and the following results were obtained; 1. Kankohso 10 I-dinicotinate binds reversively with bovine serum albumin or serum r-globulin, resulting in metachromasia. By bindin...

NMR technology has advanced significantly during the past year. Four-dimensional NMR spectroscopy is a feasible approach for unraveling the extremely crowded NOE spectra of medium-sized proteins. Alternatively, the use of selective deuteration also shows promise in this area. New three-dimensional NMR techniques can be used for accurate measurement of multiple-bond J couplings and improved meth...

Recently, more attentions have been focused on the exploration of hemicelluloses in the paper industry. In this work, xylan-grafted-polyacrylamide (xylan-g-PAM) biopolymers were synthesized by the graft copolymerization of xylan with acrylamide, and their interaction with fibers was also investigated to improve waste newspaper pulp properties with or without cationic fiber fines. The influences...

Biopolymers such as alginate and pectin are well known for their ability to undergo gelation upon addition of multivalent cations such as calcium (Ca(2+)). Here, we report a simple way to activate such ionic gelation by UV irradiation. Our approach involves combining an insoluble salt of the cation (e.g., calcium carbonate, CaCO(3)) with an aqueous solution of the polymer (e.g., alginate) along...