Maya Sacbeob and the Materialization of Ch’ulel Life Force
Introduction Researchers have been fascinated by monumental causeways in the Maya cultural region for centuries. Known by the Yucatec Maya word sacbe (or, sacbeob in the plural), meaning “white road,” these features comprise key elements of the built environment at Lowland Maya city-states from the Late Formative through Terminal Classic Periods. The roads’ forms are relatively uniform, and a combination of site-level and synthetic studies have revealed typological categories of intersite and intrasite features. The large corpus of known sacbeob,…...
CH 456: Determination of Water Hardness of Filtered and Unfiltered Water
Introduction Water hardness is defined as the capacity of water to react with soap, and is caused by the presence of a variety of polyvalent metal ions.1 The two metals that contribute most heavily to water hardness are calcium and magnesium, and hardness is expressed in milligrams of calcium carbonate per liter of water (a measure of parts per million, ppm) by convention.1 These dissolved metallic salts most often leech into water from sedimentary rocks, runoff, and human activities such…...
Chemical and Mineral Components
Spatiotemporal distribution of some chemical and minerals components in an Egyptian lake connected to Mediterranean Sea: In relation to different pollutant inputs Ghada F. El-Said, Manal M. El-Sadaawy, Nayrah A. Shaltout, Abeer A. Moneer Marine Environment Division, National Institute of Oceanography and Fisheries, Kayet Bay, El-Anfoushy, Alexandria, Egypt Abstract Lake Edku is one of Egyptian delta lakes locating along the Mediterranean Sea and suffering from intensive anthropogenic activities and ecological degradation due to societal development. The seasonal variation of some…...
Caco3 Hcl Sample Paper Overview
The sample paper on Caco3 Hcl familiarizes the reader with the topic-related facts, theories, and approaches. Scroll down to read the entire paper.Introduction: The experiment taking place is between calcium carbonate [CaCO3] and hydrochloric acid [HCl]. Calcium carbonate, also known as marble, is a metamorphic rock. This is a rock that is formed over long periods of time under high temperature and pressure. It is also formed when carbon dioxide reacts with calcium hydroxide to produce calcium carbonate. Calcium hydroxide…...
Calcium CarbonateCarbon DioxideChemical ReactionChemistryMaterialsWater
Determination Of Water Hardness
This sample of an academic paper on Determination Of Water Hardness reveals arguments and important aspects of this topic. Read this essay's introduction, body paragraphs and the conclusion below.ABSTRACT The average concentration of CaCO3 obtained was 212 ppm, with a standard deviation of 1 ppt. The results indicate that the unk B tap water can be considered as hard water. INTRODUCTION Hard water is due to metal ions (minerals) that are dissolved in the ground water. These minerals include Ca…...
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