March 2018 Science Newsletter

marchNow that you are in the middle of winter we know that you are facing many challenges as you bring the joy of science to your students. Finding the best equipment and science material doesn’t have to be one of those challenges. We are here to give you the personal service in deciding the best in science equipment to effectively teach science. In order to find the best equipment at the most reasonable prices we invite you to explore our website at MicroscopesandMore. In addition please feel free to contact us for personal assistance in finding the best material to continue to make science an exciting activity for you and your students. We are here to help you.

We are continuing the weekly discount specials. Watch your inbox for our “Weekly Special” offering items from our extensive selection of materials at great savings. A wonderful opportunity to obtain great science supplies at very low prices.

This Month’s Highlighted Products

Digital Zoom Tablet
420tablet

Now with detachable 8″ tablet, the BTW1-420TH offers the convenience and versatility of viewing a large picture at 10x magnification, then zooming continuously all the way to close-up detail at 40x magnification. Upright, unreversed 3-dimensional image remains in focus throughout zoom range. Optional eyepieces and auxiliary objectives expand magnification range and working distances. Trinocular port accepts video or SLR adapters (included). Features top light with directional beam, bottom light with cool, long-life fluorescent illumination. Like the Moticam X, this WiFi digital tablet transmits live images to iOS or Android devices. Use it as a conventional microscope or share live images with colleagues using WiFi tablets, wireless laptops, and HD-ready monitors/projectors through HDMI. Tablet includes preloaded Motic apps. More Info…

Ohaus Triple Beam Jr.
750-00_1

The Budget Triple Beam Balance designed to meet demanding budgets with precision performance.
Description
• Three notched and tiered beams
• Positive poise positioning
• Spring loaded zero adjust compensator
• Capacity: 610g
• Readability: 0.1g
More Info…

Ohaus Frontier Mini Centrifuge
Centrifuge

Small but powerful mini centrifuge for simple and quick liquid separation. With an 8-place 1.5/2mL tube rotor as well as a 4 place PCR 8-strip tube rotor, Frontier™ 5306 can accommodate 0.2mL 8 strip tubes or 32 individual PCR tubes. With the included adapter, 0.2mL and 0.5mL tubes can also be accommodated in the 8-place tube rotor. This centrifuge provides quiet, safe, and easy operation for your everyday quick spin-down applications. AC Adapter (included) Brushless quiet motor, auto shut-off safety switches. More Info…

Science History Information

General Science

In 1953, diamond crystals, the size of grains of sand, were produced in Sweden in a high pressure press by subjecting graphite to 83,000 atmospheres pressure and about 2000°C for an hour. The research, headed by Erik Lundblad, was funded by the Swedish electrical company ASEA. The idea was conceived by refrigerator inventor, Baltzar von Platen. The press used six pyramidal anvils, set spherically around a graphite pellet. Despite one success, the equipment was unreliable and dangerous. ASEA decided not to publish the results to keep the experiment a commercial secret. Less than a year later, 16 Dec 1954, General Electric in the U.S. also produced man-made diamonds, which is recognised as the first process that was reproducible.

Biology

In 1976, swine flu claimed the life of 19-year-old Pvt. David Lewis. On the previous afternoon, this Army recruit told his drill instructor at Fort Dix, N.J. that he felt tired and weak but not sick enough to see military medics or skip a big training hike. Yet, he died within 24 hours, killed by an influenza not seen since the Spanish flu of 1918-19 which took 500,000 American lives and 20 million worldwide. On 24 Mar 1976, following advice from medical experts, President Ford called for the U.S. to give swine flu vaccinations, a $135 million program of mass inoculation of the entire population. No comparable vaccination effort had ever been attempted in the U.S. before. Afterwards, research showed it would probably have been much less deadly than the Spanish flu.

Chemistry

In 1886, German chemist, Clement Winkler discovered the element germanium. He had a background in managing a cobalt glassworks and then on the faculty of the Freiberg School of Mining, when he discovered germanium in the mineral argyrodite. Analyzing the silver sulphide ore, he found that all the known elements it contained amounted to only 93 per cent of its weight. Tracking down the remaining 7 per cent, he found the new element he called germanium (for Germany). This turned out to be the eka-silicon predicted by Dmitry I. Mendeleyev in 1871.

Physics

In 1939, the journal Nature published a theoretical paper on nuclear fission. The term was coined by the authors Lise Meitner and Otto Fritsch, her nephew. They knew that when a uranium nucleus was struck by neutrons, barium was produced. Seeking an explanation, they used Bohr’s “liquid drop” model of the nucleus to envision the neutron inducing oscillations in a uranium nucleus, which would occasionally stretch out into the shape of a dumbbell. Sometimes, the repulsive forces between the protons in the two bulbous ends would cause the narrow waist joining them to pinch off and leave two nuclei where before there had been one. They calculated the huge amounts of energy released. This was the basis for nuclear chain reaction.

Earth Science

In 1969, pieces of a large meteorite were recovered in Chihuahua, Mexico. It fell at 1:05 am as a huge fireball that scattering several tons of material over an area measuring 48 by 7 km. Named after the nearby village of Allende, samples of this carbonaceous chondrite stone contain an aggregated mass of particles several of which can be easily identified as chondrules. This ancient material comes from before our Solar System formed, thus over 4.6 billion years old. Since these remnants represent the most primitive geological material from which planets were formed, and carry information to help explain the evolution of the our galaxy, Allende is one of the most studied meteorites in the world.

This Month’s Quote

The tendinous part of the mind, so to speak, is more developed in winter; the fleshy, in summer. I should say winter had given the bone and sinew to literature, summer the tissues and the blood. – John Burroughs