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I was bored tonight and decided to toy around with some shots from the SRT-10 shoot. This was the best one of the experiment imo.
FOV: 4" wide.
This experiment demonstrates the shift in color from yellow-green to blue-green in aqueous solutions of pyranine when made acidic.
The fluid from a yellow hi-liter pen was removed and mixed with water (shown in the center test tube). The left test tube contains that solution with 1 drop of muriatic acid added. The test tube on the right contains the solution with 5 drops of a sodium hydroxide solution.
The pH of the left test tube was ~1 and the right test tube ~14. It was hard to measure the pH of the solutions since it dyed the pH indicator paper yellow.
Upon adding the drop of acid to the pyranine solution, it changed from yellow green to clear. This was because the pyranine had been protonated (provided a hydrogen ion) which reduced the absorption of light at 450nm.
Refer to this article: www.ugcfrp.ac.in/images/userfiles/30241-CPL_399_147.pdf
"At a pH less than 7, the absorption spectrum of pyranine
(HPTS) exhibits a peak at 405 nm which is ascribed to
the protonated form (ROH) while at a pH greater than 7 the
absorption spectrum exhibits an additional band at
450 nm arising from the deprotonated form (RO)."
See also:
nathan.instras.com/documentDB/paper-273.pdf
Contains:
Pyranine sol. pH less than 7 (FL Blue-green >UVabc)
Pyranine sol. pH greater than 7 (FL Yellow-green >BL/UVabc)
Shown under UVc light.
Key:
WL = White light (halogen + LED)
FL = Fluoresces
PHOS = Phosphorescent
Blue = 450nm,
UVa = 368nm (LW), UVb = 311nm (MW), UVc = 254nm (SW)
'>' = "stimulated by:", '!' = "bright", '~' = "dim"
pH of Pyranine
17Nov2015
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18 Watt Triple Output UV lamp from Polman Minerals - Way Too Cool UV lamps
A couple of shots taken overlooking Edinburgh from the Castle. Overlooking what is called "The New Town" because the Castle and Royal Mile area is the "Old Town"
The first shot here was Karen experimenting with novel photography. We did have fun.
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just wanting to experiment in my little home made studio which consisted of my floor/a cloth draped on me/ and a speedlite directed down on me haha. opinions?
Megan and I did some experimenting with the Light Blaster this past weekend. This was one of my favorites from the session.
To learn more about the Light Blaster, click here.
strobist: 1 Canon 580EX, camera left, diffused by a Light Blaster slide projector and transparent slide. 1 White Lightning x1600, camera right, gridded and red gelled pointed at the backdrop (with some spill on the back of the subject). Flash/monolight triggered via Cybersyncs.
FOV: 6" wide.
This experiment demonstrates the shift in color from yellow-green to blue-green of minerals containing the uranyl ion in conjunction with carbonates.
Uranyl nitrate was combined with NaCl and recrystallized on the glass rod. Behind it is a specimen of meta-autunite from the Daybreak Mine in Spokane WA, USA. Meta-autunite is a uranyl phosphate mineral.
Uranyl nitrate solution (0.25M) was combined with a sodium carbonate solution (1.25M) and was used to rehydrate some DAP Plaster of Paris mix which was set in a square mold.
Initially (when still wet), there was no fluorescence but after the calcium sulfate re-hydrated (and the mix produced CO2? bubbles), the resulting plaster fluoresced a bright blue-green, typical of carbonate based uranyl minerals. Behind the plaster square is a specimen with a coating of andersonite from Yellow Cat Mesa in Grant County UT, USA. Andersonite is a hydrated sodium calcium uranyl carbonate.
See:
en.wikipedia.org/wiki/Andersonite
rruff.info/uploads/CM31_167.pdf
Contains:
Andersonite (FL Blue-green >BL/UVabc)
Meta Autunite (FL Yellow-green >BL/UVabc)
Shown under blue LED light and photographed through Vuarnet #006 blue blocking sunglasses.
Key:
WL = White light (halogen + LED)
FL = Fluoresces
PHOS = Phosphorescent
Blue = 450nm,
UVa = 368nm (LW), UVb = 311nm (MW), UVc = 254nm (SW)
'>' = "stimulated by:", '!' = "bright", '~' = "dim"
Uranyl Based Fluorescence
6Nov2015
Much appreciation to Gordon Czop for the uranyl nitrate.
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18 Watt Triple Output UV lamp from Polman Minerals - Way Too Cool UV lamps
Nikon FA AF Nikkor 50/1.8
Unknown Fuji B&W film@ 100 ISO.I think it is orthochromatic motion picture or technical film (there are any markings near perforation).
Rodinal 1:100 per 1hour.
For me, fashion is a form of art. I wanted to take the time and experiment with some styles and colors to se what works and what doesn’t. Feel free to comment on what styles you think work best 😃
This didn't quite work out as had been hoped, but hey, it's the thought that counts.
13 Aug 2016, Tunnel 2, Tehachapi Pass
Yay, my daughter is becoming more cooperative which is fun for me (: I talk to her while I take pictures, so maybe that is making a difference. I really liked this image (on my laptop) - I love how her eyes came out and the hair.
I know she is a bit light on the left - but there are details there. I am experimenting with something lighter than the usual. Did levels, smart sharpening and color adjustments to bring out the color.
Strobist info/and processing: SU-800 trigger and SB-800 on right to fill out shadows, used TTL +1.0.
I am still struggling with color space issues after converting to CS3 -so it looks best in safari/omniweb browsers (and on my just calibrated laptop) oh well - one of these days...color will be consistent -- and of-course help and suggestions are welcomed and appreciated.
What???? What???? What???
Here is the back story: I bought 19 boxes of doll clothes gambling that their would be some awesome vintage clothes and there ARE!!! BUT, yes there is a but, :( I observed the boxes were moldy. The seller said yes but the clothes were all in plastic bags. With the exception of a few clothes here and there the doll clothes were in plastic bags with one other HUGE exception. NONE of the vintage Barbie clothes in two different boxes were in plastic bags. One box was no problem as the mold had not penetrated the box BUT, oh yes another BUT, the other box had more mold than any of the other 19 boxes. It had penetrated the bottom, entered the inside of the box and contaminated the clothes!!! Oh what a heartbreak. I blew as much mold as I could off with air from an air compressor and stuck them in a plastic bag. I googled clothes and mildew where I read from several sites that borax kills mold and gets rid of stains in clothes. Also that it was good for dumping down your sinks. NO WAY!!! Crystals in my pipes??? I get ahead of the story. I thought it would be a good experiment to try the borax on some Calico Critters that had never been removed from their boxes BUT mold had also penetrated their boxes. Maybe borax would work on cloth but CRYSTALS??? Is it a chemical reaction to plastic? Some plumbing pipes are plastic!!! Information said borax worked well in dishwashers but there is plastic in dishwashers. Maybe I should have added detergent to the borax solution. It all makes my head hurt. In conclusion the borax did NOT work!!! I had to soak the critters in really HOT water to get the crystals to dissolve and the mold was still there.
Title: Astronomy Experiment Module
Catalog #: 08_01315
Additional Information: Artist's Conception
Repository: San Diego Air and Space Museum Archive
Moody Experiment.
Some photos from a place you might already recognize, as there're many photos of it here. This time I tried to make something different out of the familiar views. After all, this is a landscape that probably is not scenic this time of the year. At least not for me, not in the usual sense. But of course there's a certain mood -- which might be something that comes out of myself, but I'm sure not without some stimulus, outside, it is really there, somehow. Can it be pictured? Can it be conveyed? How can you depict the actual first impression?
On a technical note: All done with old 50mm f/1.7 lens, all wide open, I used a Kenko nostaltone blue for diffusion and color shift. „Enhanced" in LR & PS.
A concrete pump operator finished work here at this location and begins folding down to relocate. This construction site is part of highway Interstate 69 In Rosenberg, Texas, near Houston. In support of America’s international trade routs, when finished, the highway will stretch border to border across America and connect Mexico to Canada. The project will take decades to finish.
Hasselblad 503CX, 60mm CF, Agfa APX 25, Rodinal 1+99, 60mins, agitate 1st minute continuously, invert at 30 minutes.
aka Brain Fart #2. Refer to Experiment #1 for an explanation. So I think compositionally the balance is a little out but I'm loving what's going on with the front of the building and tree. I'm thinking I might take this approach to some landscapes and see where it leads.
Technical properties:
Camera: Canon EOS 50D
Lens: Sigma 70-200mm f/2.8 EX DG Makro HSM II
Processing-program: Adobe Photoshop CS4
Framed and signature: Photo Scape
Copyright © 2009 by pixel@work . All rights reserved.
Another shot from the first roll through my Agfa Record pinhole camera, I will be experimenting with this a bit.
done by me and hirayama-san
not happy with this one. the aperture is way off. the stencil in the center bottom also did not work out as a result of the aperture and shit kicked stencil box.
please view in lightbox
for a laugh you must watch this video sent to me by my dear friend Tao of Jonathan it is simply adorable and a guaranteed smile!
She has not been on Flickr in a while, so some of you may not know my sweet companion of fourteen years, yes this little beauty is fourteen years old..
We have welcomed many years together, and will do so again this New Year's Eve, with maybe a friend or two who may drop by for an egg nog.
Notice her littlefblack heart on her nose. It was not there the first year of her life, and one day it just appeared, honestly.
Have a great day,
billie