Reference

Cementitious sound absorbing panels and sound absorbing sprayed wall structures

Cementitious sound absorbing panels and sound absorbing sprayed wall structures. Cornwell, Charles E.; Plunguian, Mark (USA ). U.S. US 4042745 16 Aug 1977,4 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: B32B003-26. NCL: 428310000. APPLICATION: US 76-705335 14 Jul 1976. DOCUMENT TYPE: Patent CA Section: 58 (Cement and Concrete Products) Fireproof, decorative, sound-insulating panels are prepd. from cement-based compns. and preformed foam (compn. unknown) by spraying and mech. perforating the panels or by pouring and bonding to Al sheeting. Panels or tiles with dry d. 20-40 lb/ft3 are obtained. Thus, portland cement 94, pozzolanic fly ash 20, vermiculite [1318-00-9] 11, and guar gum [9000-30-0] 1 lb are mixed, the foam is folded in, and the compn. poured into molds 4 in. .times. 4 ft .times. 4 ft. The demolded product is sliced to give 2 in. panels with dry d. 26 lb/ft3 and bonded with Al sheets for lightwt. sound insulating panels.

Experimental animal studies on the effects of plant hydrocolloids (swelling substances) on intestinal absorption

Experimental animal studies on the effects of plant hydrocolloids (swelling substances) on intestinal absorption. Foerster, H.; Hoos, I. (Zent. Biol. Chem., Univ. Frankfurt/Main, Frankfurt/Main, Ger.). Z. Ernaehrungswiss., 16(2), 140-9 (German) 1977. CODEN: ZERNAL. DOCUMENT TYPE: Journal CA Section: 1 (Pharmacodynamics) Injection of Na alginate [9005-38-3], K alginate [9005-36-1], calcium alginate [9005-35-0], carrageenan [9000-07-1], guaran [9000-30-0], methylcellulose [9004-67-5], or CM cellulose [9000-11-7], into rat intestine did not affect glucose [50-99-7] or maltose [69-79-4] absorption. The hydrolysis of maltose was not affected by the hydrocolloids. Na was absorbed from the intestinal lumen if the concn. was >120-150 mmoles/L; otherwise it was excreted into the lumen. K absorption was increased if the K concn. was raised above 6-10 mmoles/L; otherwise it was excreted into the lumen. Neutral gums did not alter ion concn. in the lumen.