Topic
Calcium oxide
About: Calcium oxide is a research topic. Over the lifetime, 7600 publications have been published within this topic receiving 66104 citations. The topic is also known as: caustic lime & quicklime.
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TL;DR: In this paper, it has been found that mixtures of monocalcium phosphate monohydrate MCPM and calcium oxide CaO set upon mixing with water and the optimum composition for such a mixture is a Ca/P molar ratio of 1.35 + 0.02.
Abstract: In a previous study it has been found that mixtures of monocalcium phosphate monohydrate MCPM and calcium oxide CaO set upon mixing with water. In this study it was found that the optimum composition for such a mixture is a Ca/P molar ratio of 1.35_+0.02. The milling procedure for preparation of the powder of this cement was also optimized. The optimum water/powder ratio appeared to be 0.53___0.01. Amounts of precipitated hydroxyapatite up to 7% by weight increased the compressive strength and the diametral tensile strength of the cement. The maximum values found for these properties were 6 and 1.6 MPa, respectively. Finally, it was found that the cement obtained its maximum strength within 5 h but this diminished upon further soaking in Ringer's solution at 37°C until after 10 weeks of soaking the strength was decreased to 62% of the maximum value.
42 citations
TL;DR: In this paper, the role of Ca-compounds on combustion and hydrolysis of HCN was studied and it was shown that CaCN2 is an intermediate product that directs the fuel-N conversion towards the formation of NH3 which is subsequently oxidised to NO.
42 citations
TL;DR: The use of moist soda lime is of crucial importance during inhalation induction with sevoflurane because the patient may inhale potentially toxic degradation products in significant amounts with dry soda lime.
Abstract: We have investigated gas composition during simulated inhalation induction with sevoflurane to elucidate possible mechanisms of incidental prolonged induction times and airway irritation. Using a circle system, 8% sevoflurane in oxygen 6 litre min-1 was washed into an absorbing canister filled with fresh soda lime containing 2.9% KOH (Draegersorb, 'D') or no KOH ( 2.5 mg, S > 0.6 mg). In summary, the use of moist soda lime is of crucial importance during inhalation induction. With dry soda lime, the patient may inhale potentially toxic degradation products in significant amounts. Sevoflurane degradation is aggravated by a high KOH content of the lime. The observed airway irritation may be caused by formic acid, which is generated in isomolar concentrations with methanol (Cannizzaro reaction). The amount of compound A found with dry KOH-containing lime is unlikely to be noxious.
42 citations
TL;DR: In this article, the reduction of CO2 emissions by a calcium oxide loop was investigated for pine sawdust in a mixture of N2 and CO2 in a fixed-bed reactor.
42 citations
Patent•
15 Sep 2004
TL;DR: Improved glass compositions for glass fibers typically useful for fire resistant blankets or containers to provide high burn-through resistance at temperatures in excess of 2,300°F and typically comprising 10.23% to 81.81% silica, 2.0% to 25.91% alumina, 0% to 12.0%, potassium oxide, 3.0%.
Abstract: Improved glass compositions for glass fibers typically useful for fire resistant blankets or containers to provide high burn-through resistance at temperatures in excess of 2,300°F and typically comprising 10.23% to 81.81% silica, 2.0% to 25.91% alumina, 0% to 12.0% sodium oxide, 0% to 6.0% potassium oxide, 3.0% to 15.0%calcium oxide, 1.80% to 10.50% magnesium oxide, 1.0% to 18.0% ferrous+ferric oxide, and 0% to 4.0% titanium dioxide; the improved glass compositions may include 0% to 9% lithium oxide, 0% to 9% boron oxide, 0% to 5.0% zirconium oxide, 0% to 6.0% manganese oxide, and 0% to 4.0% phosphorous oxide.
42 citations