نتایج جستجو برای: efflorescence
تعداد نتایج: 242 فیلتر نتایج به سال:
Aluminum sulfate shows a positive effect on preventing efflorescence of magnesium potassium phosphate (MKP) cements. Its influence the MKP cement properties and hydration is explored in this study. Compared to reference (Mg/PO4 molar ratio = 4, w/c 0.25), aluminum retards setting, increases compressive strength, has little short-term volume stability. slows down kinetics, decreases pH values, a...
The traditional production process of clay bricks involves the extraction significant amounts raw materials and consumes considerable energy, leading to anthropogenic greenhouse gas emissions environmental degradation. Using environmentally friendly in construction industry has become an attractive alternative for mitigating sustainability issues. One such is incorporating waste materials, as w...
Cirrus clouds are ubiquitous in the tropical tropopause region and play a major role in the Earth's climate. Any changes to cirrus abundance due to natural or anthropogenic influences must be considered to evaluate future climate change. The detailed impact of cirrus clouds on climate depends on ice particle number, size, morphology, and composition. These properties depend in turn on the nucle...
We have investigated the thermodynamics and kinetics of ammonium nitrate/water and mixed ammonium nitrate/succinic acid/water microparticles. The water activity of ammonium nitrate microparticles is determined as a function of composition down to 12% relative humidity by accounting for the rapid evaporation of ammonia and nitric acid. Both the observed deliquescence and water activities for amm...
The emergence of efflorescence may be traced back to a complex web interconnected processes that include many different paths. Efflorescence, in its most fundamental form, is the consequence bringing water containing dissolved salts surface masonry, letting evaporate, and then allowing remain on brickwork after has evaporated. Salt solutions have potential migrate either over surfaces masonry u...
Zinc sulfate is an inorganic compound: the sulfate salt of zinc and a good source of zinc ions. The molecular 40 formula for zinc sulfate is ZnSO4. A graphic representation of the structure of zinc sulfate is shown in figure 1 41 (Pubchem, 2014). Zinc sulfate appears geologically as a white crumbly salt efflorescence known as “goslarite.” 42 Goslarite, the heptahydrate of zinc sulfate was first...
Type 2 Diabetes Mellitus (T2DM) is a metabolic disorder influenced by interactions between genetic and environmental factors. Epigenetics conveys specific environmental influences into phenotypic traits through a variety of mechanisms that are often installed in early life, then persist in differentiated tissues with the power to modulate the expression of many genes, although undergoing time-d...
The vagaries of poetic inspiration have often been regarded as ineffably mysterious, and have provoked conjectures since antiquity. Instead of invoking the muses, we today are more apt to consider neurophysiological factors. The case of the great English poet John Milton, whose poetic inspiration seemed to follow a marked seasonal pattern, is considered here, and evidence is presented to show c...
precepts and example of John Hunter, and traced the nervous system in its gradations, step by step, from the lower to the higher classes of the animal kingdom, we should have been spared those long discussions to disprove that the spinal chord is made up of an assemblage of nerve tubes, which pass in an unbroken line from the periphery to the brain; or those figurative expressions, so productiv...
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