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July 5, 2020

Powering the Cell: Mitochondria

YouTube caption: 

Together, Harvard University and XVIVO developed this 3D animation journey for Harvard's undergraduate Molecular and Cellular Biology students about the microscopic world of mitochondria.

The animation highlights the creation of adenosine triphosphate (ATP) — mobile molecules which store chemical energy derived from the breakdown of carbon-based food.

ATP molecules act as a kind of currency, imparting chemical energy to power all the functional components of cellular activity.

July 5, 2020 at 04:01 PM | Permalink | Comments (0)

Man In Stream — Rosanna Warren

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You stand in the brook, mud smearing
your forearms, a bloodied mosquito on your brow,
your yellow T-shirt dampened to your chest
as the current flees between your legs,
amber, verdigris, unravelling
today's story, last night's travail...

You stare at the father beaver, eye to eye,
but he outstares you—you who trespass in his world,
who have, however unwilling, yanked out his fort,
stick by tooth-gnarled, mud-clabbered stick,
though you whistle vespers to the wood thrush
and trace flame-flicker in the grain of yellow birch.

Death outpaces us. Upended roots
of fallen trees still cling to moss-furred granite.
Lichen smolders on wood rot, fungus trails in wisps.
I wanted a day with cracks, to let the godlight in.
The forest is always a nocturne, but it gleams,
the birch tree tosses its change from palm to palm,

and we who unmake are ourselves unmade
if we know, if only we know
how to give ourselves in this untendered light.

July 5, 2020 at 02:01 PM | Permalink | Comments (0)

It's just impossible to nap in peace around here

July 5, 2020 at 12:01 PM | Permalink | Comments (0)

Helpful Hints from joeeze: Why microwave meals need to "rest" after nuking

[Nuking a burning candle]

Robert L. Wolke, the Washington Post's longtime food writer, addressed the headlined topic in a "Food 101" column, noting that it's one of the questions that repeatedly appears in his mailbox.

Here's the Q & A.

Q. Why do almost all microwaveable frozen meals instruct you to leave the meal in the microwave for two minutes or so after the cooking period? What happens during those two minutes?

A. Microwaves deposit all their energy within a half-inch or so of the food's surface.

It takes time for that heat to work its way inside and heat the interior to the same temperature as the surface.

Surprisingly, microwaves don't melt ice crystals very well, so any remaining internal ones need to be melted by contact with already heated food on the outside.

Okay, that's all well and good, thought I, but why do you have to leave the meal in the microwave instead of letting it finish outside on the counter?

Then the penny dropped: it's much hotter inside the box than outside, so that final internal heating is going to be far more efficient inside the machine.

Bon appetit!

July 5, 2020 at 10:01 AM | Permalink | Comments (0)

Rockstar Ruler

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From the website:

Be the coolest student (or teacher) in class with this multi-use and multi-purpose ruler.

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With an inbuilt set square, protractor, arc tool, and circular stencils, you can get your band back together and finish your geometry homework at the same time — now that's what we call multitasking!

Ruler dimensions: 14" x 4.5".

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$9.35.

July 5, 2020 at 08:01 AM | Permalink | Comments (0)

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