Nalco Holding Company

About: Nalco Holding Company is a based out in . It is known for research contribution in the topics: Corrosion & Aqueous solution. The organization has 2375 authors who have published 3056 publications receiving 51473 citations.

A method for improving flux in a membrane bioreactor

Abstract: The invention pertains to a method of improving flux in a membrane bioreactor (4) having membrane (5) by adding an effective amount of cationic, amphoteric, and zwitterionic polymers, or a combination thereof. The membrane bioreactor (4) is in a system also including an aerobic reactor (2) and anaerobic digester (3).

Apparatus for dissolving water soluble polymers and gums in water

Abstract: Water soluble vinyl addition polymers and gums are rapidly dissolved in water by first dispersing these polymers or gums into a water-in-oil emulsion, then mixing the water-in-oil emulsion with water, preferably in the presence of a surfactant, and inverting the emulsion by passing a confined stream of the resultant mixture in a tortuous path to produce turbulence so that the water soluble addition polymer or gum is released into the water as a solution.

Biocide treatment to control sulfate-reducing bacteria in industrial process waste waters

Abstract: Sulfate-reducing bacteria present in industrial waste waters can be controlled by using hydrogen peroxide in combination with non-oxidizing organic biocides known to be effective against sulfate-reducing bacteria.

Comparative transcriptome profiling of low light tolerant and sensitive rice varieties induced by low light stress at active tillering stage.

Abstract: Low light intensity is a great limitation for grain yield and quality in rice. However, yield is not significantly reduced in low light tolerant rice varieties. The work therefore planned for comparative transcriptome profiling under low light stress to decipher the genes involved and molecular mechanism of low light tolerance in rice. At active tillering stage, 50% low light exposure for 1 day, 3 days and 5 days were given to Swarnaprabha (low light tolerant) and IR8 (low light sensitive) rice varieties. Illumina (HiSeq) platform was used for transcriptome sequencing. A total of 6,652 and 12,042 genes were differentially expressed due to low light intensity in Swarnaprabha and IR8, respectively as compared to control. CAB, LRP, SBPase, MT15, TF PCL1 and Photosystem I & II complex related gene expressions were mostly increased in Swarnaprabha upon longer duration of low light exposure which was not found in IR8 as compared to control. Their expressions were validated by qRT-PCR. Overall study suggested that the maintenance of grain yield in the tolerant variety under low light might be results of accelerated expression of the genes which enable the plant to keep the photosynthetic processes moving at the same pace even under low light.

Method of improving retention and drainage in a papermaking process using a diallyl -n, n-disubstituted ammonium halide/acrylamide copolymer and a structurally modified cationic polymer

Abstract: A method of increasing retention and drainage in a papermaking furnish comprising adding to the furnish an effective amount of a diallyl-N,N-disubstituted ammonium halide/acrylamide copolymer and an effective amount of a cationic structurally-modified water soluble polymer, wherein the cationic structurally-modified water-soluble polymer prepared by initiating polymerization of an aqueous solution of from about 95 to about 5 mole percent of an acrylamide monomer, and from about 5 to about 95 mole percent of a cationic monomer, and adding at least one structural modifier to the polymer solution after at least 30 % polymerization of the monomers has occurred.