Archive for Main Blog

Sunflower Stem Section

The vascular bundles of dicot plants are arranged in a ring within the ground tissue of the stem. The tissue inside the ring is called pith, the one outside of it is the bark.

Photo: Sony A7II with Minolta 25mm Micro Bellow Lens.

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Uranophane Mineral

Uranophane is a rare radioactive mineral of uranium, lemon yellow in color and is chemically composed of Calcium, Uranium, Silicon, Hydrogen, and Oxygen. It is relatively soft with a Mohs scale hardness of 2.5. It is also slightly Fluorescent.

Chemical Formula: Ca(UO2)2(SiO3OH)2 · 5H2O

 

 

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Elderberry Stem Section

The cells of this parenchyma tissue have very thin walls and a more or less round shape forming empty intercellular spaces which serve for aeration. Starch grains are reserve substances and are found in some of the parenchyma cells.

 

 

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Sony A7 Mark II Camera

SONY A7 MARK II With 50mm MD Minolta Lens.

The Sony A7 II is the world’s first full-frame camera with 5-axis image stabilization and provides camera shake compensation for wide-ranging mountable lenses. Compact and refined for intuitive operation, it offers enhanced Fast Hybrid AF that delivers lightning-fast focusing, super-wide coverage, and exceptionally effective tracking of fast-moving subjects. (Courtesy Sony USA).

Link to Sony A7ii Web Page

 

 

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Kelvin – Helmholtz Clouds

Kelvin Helmholtz clouds are the result of a particular type of wind shear. Wind shear occurs when one layer of air slides across another layer while moving in a different direction or a different speed (or both). This results in vertical eddies that produce a regular pattern of air waves.

In the case of Kelvin Helmholtz clouds, the eddies must be strong enough to carry the cloud over the peak and down the other side. This results in the appearance ocean waves breaking as they approach the shore.

Since these cloud formations last only a few minutes after forming, they are rarely observed.

 

 

 

 

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