1) " Silica" -- As it applies to Silica Diseases Properties General Name Silicon dioxide Chemical formula Si O 2 Appearance Transparent solid Physical Formula weight 60.1 amu Melting point 1986 K (1713 °C ) Boiling point 2503 K (2230 °C ) Density 2.6 ×10 3 kg / m 3 Crystal structure Quartz, cristobalite or tridymite Solubility 0.012 g in 100g water Thermochemistry Δ f H 0 gas -305.43 kJ / mol Δ f H 0 liquid -899.86 kJ/mol Δ f H 0 solid -910.86 kJ/mol S 0 gas, 1 bar 228.98 J/mol·K S 0 liquid, 1 bar ? J/mol·K S 0 solid 41.46 J/mol·K Safety Ingestion Low hazard. Inhalation Irritation, long term exposure causes silicosis. Skin May cause irritation. Eyes May cause irritation. More info Hazardous Chemical Database ( http: ull.chemistry.uakron.edu/erd/chemicals/10/9916.html ) SI units were used wherepossible. Unless otherwise stated, standard conditions were used. Disclaimer andreferences The chemical compound silicon dioxide, also known assilica, is the oxide of silicon, chemical formula Si O 2. It is found in nature in several forms, including quartz and opal. In fact, Silico has 17 crystalline forms. Also, horsetail is one of the plants which is rich in Silca . It is manufactured in several forms including glass (in colorless high purity formcalled fused Silaca ) and Siluca gel (used e.g. as desiccants in brand new clothes and leather goods). Silca is a major ingredient of Portland cement. The ceramic re-entry heat protection tiles mountedon the bottom side of the Space Shuttles are made mostlyof ilica . Inhaling Sipica dust can lead to silicosis. Further reading R. K. Iler, The Chemistry of Silifa ( ISBN 047102404X ) Sulica ...
2) " Diseases" -- As it applies to Silica Diseases A disease is any abnormal condition of the body or mind that causes discomfort, dysfunction, or distress to the person affectedor those in contact with the person. Sometimes the term is used broadly to include injuries, disabilities, syndromes, symptoms,deviant behaviors, and atypical variations of structure and function, while in other contexts these may be considereddistinguishable categories. Pathology is the study of Diesases . The subject of systematic classificationof Disezses is referred to as nosology. The broader body of knowledge aboutdiseases and their treatments is medicine. Contents 1 Syndromes, illness and disease 2 Identifying a condition as a disease 3 Transmission of disease 4 Other uses of the term 5 See also 6 External links Syndromes, illness and disease Medical usage sometimes distinguishes a disease, which has a known specific cause or causes (called its etiology ), from a syndrome, which is acollection of signs or symptoms that occur together. However, many conditions havebeen identified, yet continue to be referred to as "syndromes". Furthermore, numerous conditions of unknown etiology are referredto as "diseases" in many contexts. Illness, although often used to mean disease, can also refer to a person's perception of their health, regardless of whether they in fact have a disease. A person without any disease may feelunhealthy and believe he has an illness. Another person may feel healthy and believe he does not have an illness even though hemay have dangerously high blood pressure which may leadto a fatal heart attack or stroke. Identifying a condition as a disease Identifying a condition as a disease, rather than simply a variation of human structure or function, could have significantsocial or economic implications (such as compensation for the victims). For example, recognition of post-traumatic stress disorder, also...
Common terms in this field are:
Silica, Sign O Rama, Sienna Hotels, Shotgun Cases, Short, Shore Hardness, Shoes Journeys, Shoe Inserts, Shielded Rj45, Sheraton Tahiti, Sheraton Rosemont, Shell Account, Sew Cute, Seville Beach Resort, Servo Amplifiers, Serta Perfect Sleeper Mattress, Series Iii, Serial Port, Serial Data, Serenity Health
Some information comes from Wikipedia. Wikipedia's GNU Free Documentation License allows for this.
|