Adrenal extracts containing adrenaline were first obtained by Polish physiologist Napoleon Cybulski in 1895.
Japanese chemist Jokichi Takamine and his assistant Keizo Uenaka independently discovered adrenaline in 1900 (Japanese patent No. 4785).
For more information:
1. Statistical estimation of the No. of headwords in a dictionary
2. Statistical estimation of the size of your vocabulary
3. The growth of the English language vocabulary over the years
GRADE LEVEL: Elementary / Middle School - Grades 4-9
In order to estimate the No. of entries / headwords in a dictionary, first of all we have to sample the dictionary. The best and simplest way is the systematic sampling method which basically is about selecting sampling elements at regular intervals beginning at a random start.
In our case, we choose randomly a dictionary page and from here on we sampled the dictionary at equal intervals.
For example, if you have sampled 36 pages and you know the meaning of 12 words located first on those pages then the meaning is that your vocabulary size is 12/36 (one third) of the dictionary's vocabulary. If the number of headwords in the dictionary is 30,000 then your vocabulary size is about 10,000.
IN THE IMAGE BELOW:
My collection of the Oxford Advanced Learner's Dictionary from the first to the eighth edition.
As you know, science fair projects are displayed on display boards.
Take in account that a lot depends on a good display board. If your display board is attractive, the visitors (including the judges) will have good impression about it. However, if your display board is cluttered and in a mess, the readers will get a bad impression about your work and will ignore it, no matter how worthy is your research.
Your display should be a promotional presentation and not a full description of your project. Remember, the judges and readers have only a few minutes at their disposal to get impressed by your project.
A general display board layout follows. There are possible other variations for the organization of your science fair project on the display board.
Photography and video vintage equipment from the 60s and 70s
In the picture:
The Zorki 4, a 35 mm rangefinder camera, was the most successful Zorki and maybe the best Russian camera ever. It was produced between the years 1956–1973 and based, to some degree, on Leica technology.
- Webmaster, information specialist, present
- Bezeq, Israel
- YES, Israel
- Buzz (current)
My name is Tzvi Rubin (Julian); born 1954; live in Israel in a little desert town called Dimona (the setting of my first novel).
I have been an avid reader from early age and penned my first novel at the age of twelve in Hebrew.
By profession, I am an electronics and computer technician and those are the position I held in the Israeli army Signal Corps and upon my release, at Bezeq, the Israeli National Telecommunication Company.
I earned my Bachelor’s degree in math and Jewish history at the Open University of Israel and make a living, mainly as an information specialist freelancer and as a math, English and science high school teacher.
I am also very interested in Bible history.
My first juvenile novel, The Orchid Grower, reflects many of my life experiences and interests (children, dogs, sports, science, Internet) . My main goal was to present to the young reader several scientific topics fluently interwoven into an adventure plot in order to encourage science, web and computer literacy among the young. I prefer to write for the pre-puberty age because those youngsters are old enough to understand and young enough not to lose optimism.
- Open University of Israel
- Technion, Israel
- Bezeq Telecommunications College, Jerusalem, Israel
- Ami Asaf, Elementary School, Dimona, Israel