| Othmer_Library_of_Chemical_History sources from the 16th century on the history of the chemical sciences and technologies. |
| Radioactivity__Historical_Figures Focuses on four primary figures in the development of the understanding of nuclear structure and radioactivity, namely Wilhelm Conrad Roentgen, Antoine Henri Becquerel, Marie Sklodowska Curie, and Ern |
| Rediscovery_of_the_Elements Photo tour of the places in Europe and North America where each of the chemical elements was first discovered. |
| Schoenberg_Center_for_Electronic_Text_and_Image The Edgar Fahs Smith Image Collection contains over 3,000 images of scientists, laboratories, and scientific apparatus. A selection of these prints, engravings, and photographs is reproduced on this s |
| Selected_Classic_Papers_from_the_History_of_Chemistry Extensive collection of interesting and important papers. |
| Society_for_the_History_of_Alchemy_and_Chemistry_(SHAC) Information on how to join the Society, its activities, journal and conferences. |
| This_Week_in_Chemical_History Annotated calendar noting both the people and the events related to various dates. |
| Asian_Regional_Research_Programme_in_Energy,_Environment_and_Climate,_ARRPEEC Conducting research on energy-environment-climate issues in Asia. Objectives include mitigation of greenhouse gases and other hazardous emissions. Centered in Bangkok, Thailand. |
| Avian_Collision_and_Electrocution__An_Annotated_Bibliography California Energy Commission compilation of information about losses of birds due to collisions with power lines, towers, wind turbines, and other structures, and from electrocution by power lines. |
| Coal_Combustion,_Inc_ Provides coal and power industries with sound coal quality and utilization services through classes, seminars, and training. Offers articles, publications, and stories. |
| CoalBed_Methane_Coordination_Coalition Wyoming group concerned with protecting ownership and lease rights, preventing waste or damage to natural resources, providing safe working and living environments, and other aspects of coalbed methan |
| Electrotechnology_Applications_Center Provides confidential assistance to businesses to improve productivity, increase energy efficiency, and achieve and maintain environmental compliance. |
| Energy_-_Ministère_des_Ressources_naturelles Information on how the Québec government and its partners develop, distribute and manage natural resources, in particular hydro-electricity and new forms of energy such as solar and wind energy. |
| Environmental_Organization_WebDirectory_-_Science_Energy Energy planning, alternative fuels, geothermal, energy conservation, energy efficient housing, and heat pumps. |
| Environmental-Expert_com articles, events, software, and web resources for energy and renewable energy. |
| EPA_Clean_Energy_Site EPA site to supply information on clean energy programs. Home of Power Profiler and eGRID. |
| Green_Energy_Project Information on "green energy" sources, energy-related emissions and their environmental impacts, and economic benefits of emissions reductions. |
| International_Energy_Agency__Environment Policy analyses on several topics related to energy technology and the environment. |
| Modern_Dragons__Threatening_Global_Disaster Essays on various topics related to energy and the environment. One essay argues that sensationalization of threats from nuclear power has created a public phobia similar to the irrational fear of dra |
| National_Photovoltaic_Environmental,_Health_and_Safety_Assistance_Center Information and analysis on environmental aspects of photovoltaic (solar electric) technology, including concerns about heavy metals in solder. Funded by the U.S. Department of Energy. |
| Renewing_India A site dedicated to energy and environment in India. An exhaustive information on all forms of renewable energy and energy efficiency, energy policies, news, newsletters, and articles. |
| Roy\'s_Home_Page Information and analysis on the human and environmental impacts of hydroelectric projects and other energy technology, dam safety, integrated resource planning, and other topics. Includes comparative |
| Safe_Waste_And_Power A consultancy company that promotes the use of Plasma Gasification for waste disposal and power generation. Describes what it is and how it works. |
| SGA_Energy_Limited Environmental consulting firm of engineers and economists performing studies on renewable energy development, climate change topics, and other aspects of energy and environment, in Canada and internat |
| Solar_Electric_Light_Fund non-profit charity which promotes solar rural electrification and energy self-sufficiency in developing countries. |
| Solar_Site Lists innovative uses of solar energy used around the planet. |
| Tata_Energy_Research_Institute,_TERI A non-profit, scientific and policy research organization, working in India and globally in the fields of energy, environment and a whole range of sustainable development issues. |
| Thermal_Energy_Group The Termal Energy Group at the Norwegian University of Science and Technology (NTNU) carry out scientific research and education within conversion of natural gas, oil and solid fuels to mechanical wor |
| Union_of_Concerned_Scientists__Clean_Energy Examines benefits and costs of energy use, and promotes energy technologies that are renewable, safe, and cost-effective. |
| Western_Research_Institute Conducts research and develops technologies for mitigating environmental effects of energy technologies. Includes information on coal, ash, heavy oil refining, alternative fuels, spill remediation, an |
| Abandoned_Mineral_Lands_in_the_U_S__National_Parks About the legacy of mining in the national parks, the environmental impacts of mining, and the hazards associated with abandoned mine lands. Many photos. |
| CANMET_Environment_Laboratory Canadian government institution that addresses the environmental concerns of the minerals and mining industries, including effluent processing, safe disposal of waste materials, and decommissioning of |
| Centre_of_Excellence_for_Sustainable_Mine_Lakes The Centre, located in Western Australia, is a research hub creating smart mine lakes that are of value to communities, the environment and the economy. |
| Defenders_of_Weetootla Activist site describes basis for opposition to magnesite open-cut mines in the Gammon Ranges National Park in South Australia. |
| Environmental_Processes_that_Affect_Mineral_Deposits_in_the_Eastern_United_States Describes USGS research efforts on environmental aspects of massive sulfide mineral deposits. These have a high potential for adverse environmental impact due to high sulfide content and low acid-b |
| Mine_Water_Research_at_The_University_of_Newcastle About research on the hydrochemistry, hydrogeology, and treatment of mine effluents. |
| Mineral_Resources_Forum An Internet framework for international co-ordination on the theme of minerals, metals and sustainable development. News and information about mining and the environment world-wide. |
| Mines_and_Communities_Website News and other information, including the Minewatch and Partizans archives, intended to empower activists and those affected by global mining trends, particularly in the Pacific region. |
| No_Crandon_Mine Site provides links to organizations opposed to, and information about, the proposed Wolf River Crandon mine in Wisconsin |
| Oxfam_Community_Aid_Abroad__The_Mining_Campaign Monitoring Australian mining companies' impact on the environment and vulnerable communities. |
There are four
historical periods in the life of the purple murexide dye:
When it was a chemical curiosity, made from boa constrictor excrement
1776-1820
more
other pages can be found here ...
When the chemistry began
to be understood
1820-1840
more
chemical equations for the synthesis of murexide from uric acid and a molecular model
When industrial production
began, based on guano
1840-1865
more
a recipe for the synthesis in French
The decline and fall of murexide after 1865
more
an English translation of the recipe
last modified ...
document.write(document.lastModified);
Email: webmaster@chriscooksey.demon.co.uk
Indigo
Tyrian
purple
Dyes
in History and Archaeology
Henry Edward Schunck
Lichen
purple
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