and aluminous mate¬ria that reacts chemically with calcium hydroxide (lime) to form com¬pounds having cementitious properties.” In early civilizations, natural pozzolans were mixed together with lime to produce hydraulic cements, whereas today natural or artificial pozzolans are usually used together with portland cement. The hydration of the calcium silicate compounds, C3S (or alite) and C2S (or belite), in portland cement produces abundant calcium hydroxide through the reactions represented by following
components to humanity and life as we know it. Without them, many things that we both love and need would be gone. These remarkably diverse yet very similar elements that make up the alkaline earth metals family are: Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra). Although this family is often overshadowed by the infamous alkali metals, you will soon learn how spectacular and brilliant these metals really are and their value to human life. The alkaline earth
subjected to anti-androgenic compound, cyproterone acetate (CA). Rats were divided into 5 groups treated daily via an oral tube for two intervals 2 and 4 weeks, 1st control, 2nd E (63mg/kg), 3rd CA (25mg/kg), 4th E+CA and 5th E as prophylactic one week before E+CA treatment. So CA used as a positive control compound with antiandrogenic activity with proposed testicular oxidant. The body, testes, epididymis and vas deferens weights were recorded. Sperm count, nitric oxide (NO), calcium ion (Ca2+) and malondialdhyde
that is now really rampant in humans especially. Some causes of kidney stones are still being argued from whether it is due to what is consumed or having a history in the family. There are some common kidney stones which are phosphate, oxalate and calcium. This kidney stones may vary in sizes, in other words if the kidney stones in one that is small then there is a less tendency to notice. Although, most people would notice when they starting filling pains that feel like cramps on the back and the
Science- Calcium Calcium is the 20th element of the periodic table. It is a metallic element that is greyish-silver in colour and has the atomic symbol of Ca. It is a group 2 alkaline earth metal and is the 5th most abundant element by mass in earth’s crust. It is also reactive with water and is relatively soft. It is an essential element for organisms, and is major material that is used in the materialisation of teeth, bone and shells. It is also the most abundant metal located within animals.
less likely if it is inhibitory. Neurotransmitters can also produce their effects by modulating the production of other signal-transducing molecules ("second messengers"messengers") in the post-synaptic cells (Cooper, Bloom and Roth 1996). Nine compounds -- belonging to three chemical families -- are generally believed to function as neurotransmitters somewhere in the central nervous system (CNS) or periphery. In addition, certain other body chemicals, for example adenosine, histamine, enkephalins
The purpose of the lab is to determine the effectiveness of using gravimetric analysis in determining the hardness of a water sample. More specifically, this lab tests for the amount of dissolved substances such as magnesium carbonate and calcium carbonate. The amount of these substances dissolved in water determines water hardness as they contribute cations to water which result in a buildup of scum or solid CaCO3 as a precipitate. All water tends to have a different hardness as it is determined
are other test that can be used to test specific parts of the body. There’s the Peripheral DXA (DXA), Quantitative Ultrasound (QUS), Single Photon Absorptiometry (SPA), Peripheral QCT (PQCT), Single-Energy X-Ray Absorptiometry (SXA), Quantitative Compound Tomography (QCT), and the Dual Photon Absorptiometry (DPA). These different test measure different body parts bone mass which includes: (DXA) at the forearm, finger, and heel, (QUS) heel or finger, (SPA) wrist, (PQCT) forearm, (SXA) heels or wrist
in your body. Calcium (CA), Phosphorus (P), Potassium (K), sulfur (S), and a few other elements account for most of the remaining 4%. Trace Elements: elements that make up less that 0.01 percent of your body mass are nevertheless critical to your health. Compounds • Most elements can interact with other elements forming complex types of matter called compounds. Compound: A substance containing two or more elements that are chemically combined in a fixed ratio. • Compounds properties may
hind legs. The spurs are attached to venom glands that produce a toxic cocktail of at least four different classes of peptides. These four compounds (Hyaluronidase, OvCNP-39, OvNGF, and defensin-like peptides) are highly selective enzymes and polypeptides that work together to inflict excruciating pain and edema that can last for months. The first compound identified, Hyaluronidase, lowers viscosity to allow for a deeper penetration of the venom into tissue. A C-type natriuretic peptide called
A& P I Bone is a hard living, growing tissue; it makes up the framework of the body. Made mostly of collagen and calcium phosphate, bones are strong and flexible enough to withstand stress. The skeleton provides support and structure to the body, it gives us the ability to move and hold our body up against gravity. Although our body is very sturdy, we are often prone to painful and disabling injuries such as fractures. A bone fracture is a medical term in which a bone becomes
other metallic compounds to their base metals. For example, when thermite (a mixture of powdered iron oxide and aluminum) is heated, the aluminum rapidly removes the oxygen from the iron; the heat of the reaction is sufficient to melt the iron. This phenomenon is used in the thermite process for welding iron . The oxide of aluminum is amphoteric—showing both acidic and basic properties. The most important compounds include the oxide, hydroxide, sulfate, and mixed sulfate compounds. Anhydrous aluminum
: 1. To run the synthesis of calcium oxalate via the precipitate from solution containing calcium ion and oxalate ion. 2. To do a thermo gravimetric analysis on calcium oxalate. 3. Understand and practice the method of homogeneous precipitation through this experiment. Introduction Thermo gravimetric analysis (TGA) is one of the common analytical thermal analysis techniques that widely use to determine the thermal profile and stability of compound. This is rather important in the
PORTLAND CEMENT Chemical composition. Portland Cement is made up of four main compounds: tricalcium silicate (3CaOSiO2), dicalcium silicate (2CaOSiO2), tricalcium aluminate (3CaOAl2O3), and a tetra-calcium aluminoferrite (4CaO Al2O3Fe2O3). In an abbreviated notation differing from the normal atomic symbols, these compounds are designated as C3S, C2S, C3A, and C4AF, where C stands for calcium oxide (lime), S for silica, A for alumina, and F for iron oxide. Small amounts of uncombined lime and magnesia
The Effect of Sodium Carbonate on Hard Water Aim === In this experiment, we aim to investigate the effect of sodium carbonate on hard water. Method ====== Firstly, 25.00cm3 of a sample of water was pipetted into a clean conical flask. The pipette was used because this measures and delivers a very accurate amount of liquid (to the nearest hundredth of a cm3, or 0.01cm3), but care had to taken to make sure it was not held by the bulge, as this could have made the amount inaccurate
discovered this metal). This metal was discovered in Khafajah Mesopotamia; around 2500 BC (first kiln date). The Ancient Romans prepared lime as calcium oxide. However this could not be the first scientific date of discovery; this is because it was not discovered, isolated and named. An English scientist named Humphry Davy was the first person to isolate calcium, this was done in 1808 by mixing mercuric oxide and lime; he then performed an electrolysis of the mixture. Davy then used electrolysis to isolate
Experiment is to investigate the rate of reaction between hydrochloric acid and calcium carbonate Hydrochloric acid + Calcium Carbonate Þ Calcium Chloride + Water + Carbon Dioxide 2HCl (aq) CaCo3 (s) CaCl2(s) H2O (aq) CO2 (g) There are a number of variables in this experiment and these are listed below as input variables and outcome variables. The input variables are the ones that I can change in order to affect the experiment and the outcome variables are the ones I will measure to see how the
causes the bones to soften and weaken before the fusion of the growth plate. The adult version of this disease is called osteomalacia. In both adults and children it is caused by a long term and extreme vitamin D deficiency. Vitamin D allows for calcium and phosphorous to be absorbed from the gastrointestinal tract which is necessary for bones to have their mechanical properties. In children Rickets can result in bone pain, slow growth, increase risk of fractures and bone deformities, such as scoliosis
Although your bones are usually very strong, they consist of living tissue that continually breaks down and rebuilds. As you age, it’s possible for old bone to break down faster than the building of new bone. Osteoporosis is a disease that occurs in the bones. The bones are part of the skeletal system which contains a total of 206 bones. Osteo means bones and porosis means porous. This disease causes the bones to become weak and brittle. Some victims of this disease are not aware that anything is
A broken bone is one of the worst and most painful injuries you can suffer. Broken bones can be caused by many different things such as falling on it or even a hard-twisting motion. Bones can be easily viewed as a solid, non-working part of our body where tissue just sits, but your skeletal system is as much a living part as your organs. Your body stores minerals in the compact bone, and stores fat in the yellow marrow. Your bone also has the ability to produce red blood cells in the inner part,