вторник, 19 декабря 2017 г.

Scientific events


Scientific meetings are one of the primary venues for scientists to present their new work to their colleagues with the purpose of receiving feedback at an early stage of their research, and thus they are an integral part of the process of science. They serve as an informal peer review that can help researchers to develop, clarify, and refine their work as they proceed to write it up and submit it for formal review and final publication. In addition, meetings allow researchers to hear about what others in their field and related disciplines are doing, talk with colleagues from different institutions around the world, and learn about new research, tools, and techniques that might be relevant to their work.
Some meetings are small and narrowly focused on a specific topic or theme, while others are meant to bring many thousands of scientists together annually and are very broad. Regardless of the size of the meeting, the main goal is to bring a community of scientists together and provide opportunities for them to interact.
Groups of men (and they were, in fact, all men) interested in discussing science met as early as 1640 in London; eventually, these meetings led to the establishment of the Royal Society of London in 1660 (Gribbin, 2007) (see Scientific Institutions and Societies). Since then, scientific societies and meetings have grown together. Early meetings remained small and local for about 200 years since transportation was difficult and costly, but larger meetings began to proliferate (along with scientific societies) in the mid-1800s.
For example, a group of scientists gathered in Philadelphia, Pennsylvania, on September 20, 1848, with the goal of establishing a new national-scale organization: theAmerican Association for the Advancement of Science (AAAS). They held six days of talks andpresentations by prospective members and, by the end of the meeting, had 461 registered members on the books (Kohlstedt et al., 1999). Louis Agassiz, one of the founders, worked with two other scientists to draft the "Rules and Objectives of the Association," which stated that one of the fundamental goals of the new society was, "By periodical and migratory meetings, to promote intercourse between those who are cultivating science in different parts of the United States" (as quoted in Kohlstedt et al., 1999). In other words, they recognized that scientists were at work all over the country, and they hoped to overcome geographic barriers that kept scientists apart by holding regular meetings that moved around the country.
Another goal of the new society was "to give a stronger and... more systematic direction to scientificresearch in our country" (as quoted in Kohlstedt et al., 1999). The new society, therefore, would not only provide an opportunity to bring the community together through meetings, but would guide research through consensus of the membership. At the first AAAS meeting in 1848, a group of new members – still all men – wrote three resolutions to influence research directions in the United States. One of these resolutions was to establish a committee to address "the Secretary of the Navy, requesting his further aid in procuring for Lieut. Maury the use of the observations of European and other foreign navigators, for the extension and perfecting of his charts of winds and currents" (AAAS, 1848). The support of a wide group of scientists may have eventually helped Lieutenant Maury hold an international meeting in 1853 to establish standards for weather measurements (see Data Analysis and Interpretation). In many cases, meetings still provide the opportunity to bring the membership of a society together to vote on resolutions or position statements and to give direction to future research.

пятница, 17 февраля 2017 г.

Disease


For several centuries, people though diseases were caused by wandering clouds of poisonous vapor. We now know that this theory is pretty ridiculous, and that diseases are caused by specific bacteria. But how did we get to this new idea of germ theory? Tien Nguyen describes the work of several scientists who discredited a widely accepted theory in a way that was beneficial to human health.
Watch the video How a few scientists transformed the way we think about disease by Tien Nguyen, that was created with support from the U.S. Office of Research Integrity: http://ori.hhs.gov.


четверг, 16 февраля 2017 г.

Miasma theory

Have you heart anything about Miasma theory ?

miasma /maɪˈæzmə/ (usually singular) means a heavy cloud of something unpleasant or unhealthy:
A miasma of smog settled over the city.
The origin of the word miasma is New Latin, from Greek, defilement, from miainein to pollute, the first known use was in 1665.
This word (plural miasmas also miasmata \-mə-tə\) can be used for a vaporous exhalation formerly believed to cause disease.

In miasma theory, diseases were caused by the presence in the air of a miasma, a poisonous vapour in which were suspended particles of decaying matter that was characterised by its foul smell. The theory originated in the Middle Ages and endured for several centuries. That a killer disease like malaria is so named - from the Italian mala‘bad’ and aria ‘air’ - is evidence of its suspected miasmic origins.

In notes taken during a voyage to South America on HMS Beagle in the 1830s, Charles Darwin described an illness that he believed was caused by "miasma" emanating from stagnant pools of water. For him, "miasma" had the same meaning that it did when it first appeared in English in the 1600s: an emanation of a vaporous disease-causing substance. But while Darwin was at sea, broader applications of "miasma" were starting to spread. Nowadays, we know germs are the source of infection, so we're more likely to use the newer, more figurative sense of "miasma," which refers to something destructive or demoralizing that surrounds or permeates.

miasmal 

\-məl\ adjective

miasmatic 

\ˌmī-əz-ˈma-tik\ adjective

miasmic 

\mī-ˈaz-mik, mē-\ adjective

miasmically 

\-mi-k(ə-)lē\ adverb

вторник, 14 февраля 2017 г.

Hermann J. Muller




Hermann Joseph Muller was born in New York City on December 21, 1890. His grandparents on his father's side were of artisan and professional background and, though at first Catholics, had emigrated from the Rhineland during the wave of reaction of 1848 to seek the greater freedom of America.

He first discovered that genetic mutations can be induced through the use of X-rays, and he demonstrated that mutations are the result of breakages in chromosomes and of changes in individual genes. The Nobel Prize he got in 1946 for this discovery increased his opportunities to publicize the dangers posed by accumulating spontaneous mutations in the human gene as a result of industrial processes and radiation. He also promoted an idea of sperm banks of gifted men in order to preserve the quality of man’s life for the future.

вторник, 31 января 2017 г.

What happens when your DNA is damaged?

The DNA in just one of your cells gets damaged tens of thousands of times per day. Because DNA provides the blueprint for the proteins your cells need to function, this damage can cause serious issues—including cancer. Fortunately, your cells have ways of fixing most of these problems, most of the time. Monica Menesini details the processes of DNA damage and repair.

пятница, 20 января 2017 г.

History through the eyes of the potato

Baked or fried, boiled or roasted, as chips or fries; at some point in your life you’ve probably eaten a potato. But potatoes have played a much more significant role in our history than just that of the dietary staple we have come to know and love today. Leo Bear-McGuinness shares how without the potato, our modern civilization might not exist at all.

пятница, 13 января 2017 г.

Antibiotic resistance

Right now, you are inhabited by trillions of microorganisms. Many of these bacteria are harmless (or even helpful!), but there are a few strains of ‘super bacteria’ that are pretty nasty -- and they’re growing resistant to our antibiotics. Why is this happening? Kevin Wu details the evolution of this problem that presents a big challenge for the future of medicine.
Watch the video

What causes antibiotic resistance?


The Father of Microbiology

  1. Do you know who invented the first compound microscope?  2. Can you say who discovered bacteria, free-living and parasitic microscopic ...