The word aluminum comes in its etymology from the Latin "alumen" which alluded to dye-fixing salts in fabrics. Sir Humpry Davy (1778-1829), British chemist and founder of electrochemistry, was the one who gave the name "aluminum" to this still undiscovered metal, which was later replaced by aluminum, having also discovered and named potassium. The discoverer of aluminium, a silver-toned metal, was the Dane Hans Oersted in 1825.
Pure aluminum is soft and brittle, and very rare to find (it is the third most abundant element in the earth's crust); Iron and silicon must be added in small amounts to harden it. It appears in combination with other elements, and composes the silicates that form rocks. Naturally combined with oxygen and silicon it forms mica, feldstate and kaolin. In the form of hydrated silicates, it forms clay. As aluminum hydrates it forms bauxite. Its main source is bauxites, which have aluminum hydroxides and oxyhydroxides. It is covered by a corrosion resistant oxide layer . It is the lightest metal after magnesium. Its specific weightit is 2.7 g/cm3, odorless and non-toxic. One of its main qualities is that it can be recycled in its entirety ..
Many precious stones contain it, such as ruby, sapphire or turquoise. It is generally obtained by electrolysis of alumina. Its atomic number is 13, its atomic weight is 26.98 and its chemical symbol is Al. It is a good conductor of heat and electricity .
Its applications are in the automotive and aeronautical industry , in motor windings and in capacitors. It is used in hardware, construction, furniture and metal carpentry, since by naturally generating a layer of oxide, its resistance to corrosion is very high, it is even treated to further improve that aptitude. Aluminum openings, for example, are highly required in modern constructions, especially those that face the outside, since they are extremely valuable in those objects that require environmental protection .. In electricity, it is used as a substitute for copper. It is also used in aluminothermy because when it burns it gives off heat. Being a good reflector of light and heat, it is used for reflectors, for example, in the installation of light bulbs, fluorescent tubes or rescue blankets. Its home use is enormous, we can see it in aluminum foil that is used to fry food, in refrigerators, in dishwashers, in kitchen utensils, and so on.
Alzheimer concept
Alzheimer's is a serious, neurodegenerative disease , with no proven specific cause (currently it is believed that it could be due to metabolic disorders and/or vitamin D deficiency) frequent in the elderly, whose symptoms are similar or identifiable with those of dementia. senile, a term that until 1977 was used for those over 65 years of age. Today Alzheimer's designates the pathology compatible with the following symptoms regardless of the age at which they manifest in the adult individual: The patient has a lack of memory, difficulty in language, sleep problems and disorientation in time and space. Their behaviors are different from the usual, strange, and in many cases, aggressive or risky.
The name of the disease is due to one of the scientists who identified it in 1906, Alois Alzheimer. The other one who acted collaborating in the investigation was Emil Kraepelin. The investigation focused on the follow -up of a 50-year-old patient, who presented these symptoms, between the years 1901 and 1906, the date she died. After her death, the existence of plaques covering the neurons was found, and inside them, neurofibrillary degenerations. The day chosen to raise awareness about this terrible evil is September 21.
The brain atrophies and irreversibly loses its neurons , until it ends up killing the patient in a variable period, generally no more than a decade. The treatments only manage to improve the symptoms, but the progress of the disease continues its course inexorably. The person caring for an Alzheimer's patient also suffers enormous psychophysical exhaustion, as they demand not only time, but also patience and a lot of support .
acolyte concept
The word acolyte originated from the Greek term ἀκόλουθος, which can be read as “akolouthos”, a word integrated by the prefix “α” that indicates what goes together or accompanies; and by "κeλυθος" in the sense of "path", so it can be translated as "the companion", which in ancient Greece was applied to those slaves who faithfully followed their masters enjoying special benefits. From Greek it passed to medieval Latin as "acolytus" and thus it reached Spanish.
The term is widely used in Catholicism, designating as acolyte those who accompany the religious helping them in their tasks, being servants of the church, since the beginnings of Christianity . There were palatines who were the ones who served the Pope in his palace, there were also the stationaries who were auxiliaries in the churches, while the regionals accompanied the subdeacons. There are also acolytes in the Anglican church.
Currently , the acolytes also provide their contributions in the churches, taking care of the altar services, helping the priests in the liturgical celebrations (for example, they bring communion to the sick and help at the altar, especially during Mass) and According to Canon Law, lay men can only be instituted in that capacity by the bishop, for at least six years, before being ordained deacons; their functions being to distribute communion if there are many communicants or in the absence of ministers. They can exceptionally expose and reserve the Blessed Sacramentand instruct altar boys, who are the ones who help at the altar without having been instituted and being minors. Altar boys are also often called acolytes. The acolytes must be prepared in the knowledge of public worship and have the internal conviction of faith to be their services spiritually upright and worthy.
accommodation concept
The word accommodation comes in its etymology from the Latin word “accommodatÄonis”, integrated by “ad”, which translates as “towards” and by “commodus”, in turn derived from “modus” = “measure”.
Accommodation is a process that consists of adjusting something to a certain mode or measure to adapt it or make it possible for it to be used efficiently, bearably, pleasantly or pleasantly. Examples: “the arrangement of the furniture in this office tends to make it more welcoming and functional” or “I have a feeling that my adjustment to the new routine is going to be slow and it will cost me a lot of effort”.
In Psychology , accommodation is a phase in the acquisition of new knowledge, which was explained by the psychologist Jean Piaget (1896-1980), father of genetic epistemology . According to this author, when we incorporate new knowledge by virtue of our senses, we are assimilating it, but when this new content enters our cognitive structure , it will struggle to find a place among the others that pre-exist in our mind, and when trying to win that place, a qualitative change of schemes, creating a new one or a modificationof the previous one, where the new knowledge can coexist with the rest, achieving again the balance that existed before its assimilation .
In Ophthalmology, accommodation is known as the capacity of the crystalline lens, which is part of the eye, with the format of a biconvex lens, which, thanks to its increased thickness and curvature, thus manages to focus light from distant objects, for which flatten; and nearby, where it bulges, involuntarily or unconsciously . The thickness of the lens is controlled for its correct focus by the ciliary body.
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