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A.d. 1501 to 1600

Backward to A.D. 1401 to 1500

The beginning of this century marks a new period in world history, a transition from the land to communication by sea and it will be worth while to take a long look at the world at about 1501 (forgetting for the moment that Columbus and Vasco de Gama had already beaten the turn of the century) on the eve of a magnificent expansion. First of all, in the previous land oriented world, the races of man had remained essentially separated: Negroids concentrated in Subsaharan Africa and a few Pacific Islands (New Guinea); the Mongoloids in Central Asia, Siberia, the Far East and the Americas; the Caucasoids in Europe, North Africa and India; and the Astraloids in Australia and southern India. All this was soon to change with intercontinental migrations, triggered by the great sea voyages, as well as the continued land expansion of the Russians east into Siberia. In about 1501 the area occupied by the major civilizations was roughly equivalent to the area of cultivation, which was certainly less than 1/4 of the world's surface. Watermills were of great importance as a source of energy and this included the utilization of the tides in both Islam and the West.

The tempo of change after the sea voyages of this 16th century, although rapid in the Americas, was otherwise very slow. China and Japan remained intact and India held Europeans at arms length for another 250 years. However, along with the re-distribution of races, there was soon a diffusion of animals and plants, including the movement of horses, cattle and sheep from the old world to the new; tobacco, cotton, maize and potatoes (both "Irish" and "sweet") from the new to the old. Before 1500, Eurasian trade had involved mostly luxury goods, but after that the combinations of regional, economic specialization and improvement in sea transport made possible the gradual transformation into modern mass trade of bulky "necessities". The arquebus, the original, awkward, difficult to handle rifle, came into use early in the century. Progress with this weapon was more rapid in Europe than elsewhere. At the battle of Lepanto (1571) the Turkish galleys still had more archers than arquebusiers. (Ref. 260 ) The invention of printing in the last century helped to revolutionize medicine in this one, in that the wide circulation of medicinal texts shook off the effects of over a thousand years of Galen's influence. (Ref. 213 )

At the beginning of this 16th century, even ignoring western and central Europe, there were six dominant empires in the world, the richest and most populous being the Ming Empire of China. In addition there were the Mughal Empire in northern India and southeast Central Asia, the Persian Safavid Empire including most of the Arabian peninsula, the Ottoman Empire of southeastern Europe, Turkey, North Africa and the eastern Mediterranean and finally the somewhat overlapping Mali and Songhai empires of the southwest Sahara. Continuing the trend established in the time of the Roman Empire, the precious metals of the western world continued to leave for India and China in exchange for their textiles, spices and oriental "luxuries". In this century the money went in the form of Spanish pieces of eight. (Ref. 260 ) The map on the facing page is of interest concerning the exploration of the world, chiefly in this century.

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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Source:  OpenStax, A comprehensive outline of world history. OpenStax CNX. Nov 30, 2009 Download for free at http://cnx.org/content/col10595/1.3
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