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Category Archives: Molecular Biology

Painters’ Colours, Oils, and Varnishes: A Practical Manual by George H. Hurst, F.C.S. – published in 1892

Painters’ Colours, Oils, and Varnishes: A Practical Manual by George H. Hurst, F.C.S. Published in 1892 by Charles Griffin & Company, Limited, Exeter Street, Strand, London

I love this book and, I want to share some of what is in it, with links, so that the information can be used by artists and people doing various crafts.  The old information is fascinating and, coupled with what is available today – it is usable!  Be safe!  Be careful!  Most of this is not safe for children.  Please, always  keep safety in mind.

IMG_0088As I get going on this little project, I will add excerpts and links below.  Please feel free to comment, add and send links – the more information and the easier it becomes to find it, the better for everyone!

I am going to try to update this post regulary, with more excerpts and more links, as I work my way through this book!

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Chapter I:  Introductory. Colour, Colours, Paints and Varnishes.

from page 4, “Cause of Colour in Coloured Bodies. — The actual reasons why bodies such as vermilion, magenta, or emerald green are coloured, it is almost impossible to investigate in the present state of knowledge, since the cause, whatever it may be, must be due to the molecular construction of the different compounds about which very little is known…”

  • Geology is the key word here.  Geologists have been working to increase our knowledge base of Earth in general and specifically, in this case, our knowledge of pigments. Here is a great place to read about colour, Dust to Dust:  A Geology of Color by Heidi Gustafson  –  if you like playing in the dirt, foraging for rocks and then doing something with them, Heidi Gustafson’s website has some great information in it!

from page 5, “Colour Theories. — Two theories of colour are in use to explain the coloured effects of light.  The old theory… Brewster… The more modern theory, first broached by Young and more fully developed by Helmholtz…”

  • Sir David Brewster’s (1871-1868) work on colour theory is from the 1830’s.  His work “On a new analysis of solar light” was written in 1831 and published by Charles Tait, and Bell & Bradfute; and T. Cadell, London.  One place I have found credit for Sir David Brewster’s theories on the perception of colour is in an article by Peter John Brownlee, “Color Theory and the Perception of Art“, published in 2009 by The University of Chicago Press Journals.
  • Thomas Young, M.D. (1773-1829), was a scientist studying human perception of colour and in 1802 wrote a treatise speculating on how the human eye works to perceive colour.  There is also a lecture series by Thomas Young, “A Course of Lectures on Natural Philosophy and the Mechanical Arts” which was published in London by Joseph Johson, St. Paul’s Church Yard, in 1807.
  • Hermann von Helmholtz (1821-1894), continued work on the development of Thomas Young’s theories of human colour perception.  This work is known as the “Young-Hemholtz Theory” and furthers Thomas Young’s theories as to how our eyes actually work to perceive color.
  • This body of knowledge has been expanded upon for more than the 250 years shown in these writings and continues to grow today.  Here are just a few examples of the psychology of colour perception that are a little more recent.

from page 6, “Colours. — … the term “colours” is used in two senses — first, to express the sensation which light of various kinds… excites on the retina of the eye, and which sensation is purely functional; second, … [the] imparting [of] colour to other bodies;  such bodies are known as colouring matters and may be divided into two groups, dyestuffs and pigments….”

  • sensations of light, through rather than on the retina, continue to be studied by the scientific and psychological communities today.  This is fascinating research and the McGovern Medical School at the University of Texas has some open access resources on this subject.
  • dyestuffs, as referred to by George Hurst, are materials which provide ‘soluable’ material that can be used to add colour to another item.  In other words, dyeing or staining, imparts temporary colour to other items.  If you have access to a copy of the Oxford English Dictionary, the definition and history of the word ‘dyestuff’ is fascinating.  Most libraries have a copy of the OED and may also allow access to the online version.
  • pigments, then, as defined by George Hurst in 1892, are ‘nonsoluable’ materials which provide a more permanent, opaque colour to things like paint.  Most of the chapters in this book are about pigments, where to find them, what to find them in, how to extract them and, how to use them.

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Chapter II:  White Pigments

Chapter III:  Red Pigments

Chapter IV:  Yellow and Orange Pigments

Chapter V:  Green Pigments

Chapter VI:  Blue Pigments

Chapter VI:  Brown Pigments

Chapter VII:  Black Pigments

Chapter IX:  Lakes

Chapter X:  Assay and Analysis of Pigments

Chapter XI:  Colour and Paint Machinery

Chapter XII:  Paint Vehicles

Chapter XIII:  Driers

Chapter XIV:  Varnishes

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A related post, and… a very interesting one!

Colour Theory from 1882

book cover   title page

The link takes you to a high resolution copy of this amazing 800+ page book.

 

Beautiful Warnings….

The cherry trees lining the street where I work now are in bloom.  I have the privilege of walking by them several days a week.  Many of the buds have opened.

The "For Rent" sign was removed from this nest on Monday afternoon.  Renovations are underway and the new tenants are noisy and cheeky....

The “For Rent” sign was removed from this nest on Monday afternoon. Renovations are underway and the new tenants are noisy and cheeky….

 

This afternoon, there are more blossoms open.  Tomorrow the show of pink against blue should be stunning.

Tuesday Blossoms and the sky is even bluer....

Tuesday Blossoms and the sky is even bluer….

 

I have been privileged to stand watch as a four hour sunset turned into a four hour sunrise.  That was many July’s ago during a 12 hour graveyard shift on the roof of a coker at Syncrude.

I do not have a photograph, only memories…  Inside the plant, personal cameras are not allowed to be carried by employees.

 

Today is February 23, 2014.

The photos of the cherry blossoms were taken in Richmond, British Columbia, Canada where in February’s past we have huddled under umbrellas, pulling our jackets close as the cold winds blew in off of the water.  I grew up here.  The cold winds and wet weather of winter are what is necessary to keep the rain forests green.

 

Climate change is real.

 

I have recently read Naomi Klein’s newest book, This Changes Everything:  Capitalism vs. The Climate.  I do not believe that she exaggerates any point.

 

Every small thing we do (or don’t do) to stop the change helps.

Mangrove Forests….

I just found a wonderful and interactive site!  Well, this isn’t just a site, this is a database and, it is worth a visit….

http://mangroves.elaw.org/map

 

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Now, I tried to put the following into my own words but, it is so perfectly written that I have copied and pasted it here for you:

A Case for Mangroves
The approximately 70 distinct species of mangroves in the world cover roughly 17,000,000 hectares globally (Valiela et al.  2001) – only 0.12 percent of the Earth’s surface (Sullivan 2005, Ellison 2008).  The greatest diversity is in Southeast Asia (36-46 species); the lowest diversity is in the United States and the Middle East (1-3 species) (Polidoro et al.  2010).  Mangroves are being cut down or otherwise destroyed at such a high rate that they may be functionally extinct by 2100 (Duke et al.  2007).  In just the last 50 years, 30-50 percent of the global acreage has been lost.  (Alongi 2002, Duke et al. 2007)  Mangroves are among the most valuable and most threatened ecosystems on Earth.  The ecosystems services they provide—e.g., buffering coastal communities against flooding and storms, fiber production, habitat for thousands of species of birds, mammals and marine species—are estimated to be worth US $1.6 billion dollars/year (Polidoro et al.  2010).  In addition, recent evidence suggests that mangroves sequester carbon more effectively than any other tropical forest (Donato et al.  2011).”

This is important!

 

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There are 65 of the most influential papers on mangroves and mangrove forests listed on this site.  All are worth reading but, we don’t all have that much time….

If there is a paper that you feel is missing, please add it in the comments below.  I look forward to hearing from you.

 

Links to Two Articles on Molecular Cell Biology – Yes, I do read this stuff….

I am placing the link information for these articles here with the thought that easier access to articles such as this will encourage reading (or, maybe in this case curiosity) and open discussion.  This is also an open invitation for you to write a precis on this article (or, any other article that you find necessary or interesting)….

Once you actually get into reading articles like these ones, they are not nearly as intimidating as they could be!  This particular article even gives you some of the trickier definitions in the marginalia.

You can find more Biochemistry articles here.

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Article:  Versatility of the Mitochondrial Protein Import Machinery.

Authors:  Nikolaus Pfanner (Publications List) and Andreas Geissler.

Published in:  2001

Journal:  Nature Reviews, Molecular Cell Biology, Volume 2, May 2001, pages 339 – 349.

My copy was downloaded in November, 2014.  I found it here

http://www.m-biotech.biol.uoa.gr/MATHIMATAPMS/M4/TOKATLIDIS/Geissler%20and%20Pfanner.pdf

If any of the links do not work, please send a note or leave a comment and I will try to help.

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Article:  The Versatility and Universality of Calcium Signalling.

Authors:  Michael J. Berridge (Publications), Peter Lipp and Martin D. Bootman

Published in:  2000

Journal:  Nature Reviews, Molecular Cell Biology.  Volume 1, October 2000, pages 11 – 21.

My copy was downloaded in November, 2014.  I found it here http://web1.johnshopkins.edu/csl/academics/580427/rsc/580427_4_calciumsignalingreview_032106.pdf

Publications Lists for the Authors:

  • Michael J. Berridge  –  Link
  • Peter Lipp  –  Link
  • Martin D. Bootman  –  Link

If any of the links do not work, please send a note or leave a comment and I will try to help.

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If you find any broken links on this blog, please leave a comment or send me a note so that it can be repaired.  Thank  you….