Monday, January 27, 2014

week 3 assignments


* Post a comment on "Neptune's Medicine Chest"


Balazars artcle, Neptune's Medicine Chest, is a fluff piece written like some flowery Christopher Columbus biography.


Rather than seeing nature as having an inherent integrity of its own, corporations and many scientists operating within the institutionalized culture of an organization view it as a source of raw materials for the creation of manufactured commodities.

Pharmaceutical companies that develop a cancer drug from the environment can patent the drug and maintain sole ownership over its use for 20 years. A corporation that genetically alters a species, not only owns the result, but also the subsequent generations of that altered species.

Thus when the problem is seen as “to beat other diseases that are rapidly -- alarmingly -- developing resistance to everything in the world's antibiotic medicine chest” and the answer to that problem follows the same logic that created it, we do not generate an actual solution- a commodity is introduced to the market.

It is our economic and cultural overdependence on antibiotics that is creating more and more antibiotic resistant pathogens. The problem is not that “the terrestrial world has been scoured so thoroughly that science is running out of places to look and breakthroughs to count on,” it is that we are destroying the biodiversity of our planets and our bodies at an alarming rate.

The privatization of nature allows imperialistic-minded corporations to patent it for profit at the expense of the environment- on land or on sea.


* Post a review of one of the links below

On the Advancing Green Chemistry Website the organization maps out their vision through 'The Twelve Principles of Green Chemistry'. The principles outline a model for industrial manufacturing that envisions pure and clean water leaving factories and polluted sources being brought back to life.  However, the organizations principals are ill conceived because they do not address the intrinsic aspect of the ecological crisis that is the systemic crisis of capitalism. Indeed, we cannot analyze the global ecological crisis separately from the crisis in which it is embedded.

Advancing Green Chemistry advocates that, “Green chemistry gives your company strategic advantage by enabling you to design and differentiate products and processes by environment and health criteria, and capture top and bottom line profits throughout the value chain.”

However, it is necessary to reject the logic of profit maximization and a productivist orientation, which take no account of the limits of the environment. Given the state of the planet, it seems naïve to me to advocate a “green” logic without an anticapitalist framework. Instead it is necessary to critique institutionalized environmentalism and create alternative models of production, distribution and consumption instead of putting a green veneer on the current model.

If not, Advancing Green Chemistry and the like never fully identify the root problem(s) and instead end up being an instrument in the service of green capitalism.




The Twelve Principles of Green Chemistry*
.                 Prevention 
It is better to prevent waste than to treat or clean up waste after it has been created.
.                 Atom Economy
 Synthetic methods should be designed to maximize the incorporation of all materials used in the process into the final product.
.                 Less Hazardous Chemical Syntheses
 Wherever practicable, synthetic methods should be designed to use and generate substances that possess little or no toxicity to human health and the environment.
.                 Designing Safer Chemicals
 Chemical products should be designed to effect their desired function while minimizing their toxicity.
.                 Safer Solvents and Auxiliaries
 The use of auxiliary substances (e.g., solvents, separation agents, etc.) should be made unnecessary wherever possible and innocuous when used.
.                 Design for Energy Efficiency
 Energy requirements of chemical processes should be recognized for their environmental and economic impacts and should be minimized. If possible, synthetic methods should be conducted at ambient temperature and pressure.
.                 Use of Renewable Feedstocks
 A raw material or feedstock should be renewable rather than depleting whenever technically and economically practicable.
.                 Reduce Derivatives 
Unnecessary derivatization (use of blocking groups, protection/ deprotection, temporary modification of physical/chemical processes) should be minimized or avoided if possible, because such steps require additional reagents and can generate waste.
.                 Catalysis
 Catalytic reagents (as selective as possible) are superior to stoichiometric reagents.
.                 Design for Degradation
 Chemical products should be designed so that at the end of their function they break down into innocuous degradation products and do not persist in the environment.
.                 Real-time analysis for Pollution Prevention
 Analytical methodologies need to be further developed to allow for real-time, in-process monitoring and control prior to the formation of hazardous substances.
.                 Inherently Safer Chemistry for Accident Prevention
 Substances and the form of a substance used in a chemical process should be chosen to minimize the potential for chemical accidents, including releases, explosions, and fires.
- See more at: http://advancinggreenchemistry.org/green-chem-101/what-is-gc/#sthash.fQy7GFyj

Au


Au
Ausum, “Gold”
Atomic Number: 79
Atomic Mass: 196.96655 amu
Element Classification: Transition Metal
Appearance: Gold
Number of Protons/Electrons: 79
Number of Neutrons: 118

Uniqueness: Gold is the most malleable of all metals; a single gram can be beaten into a sheet of 1 square meter, or an ounce into 300 square feet.

Uses: currency, jewelry, electronics, art, dentistry, medicine…

Medicine: Gold is most notably used as a treatment for rheumatoid arthritis, although newer drugs have supplanted it as the treatment of choice. According to the University of Washington, Gold helps to relieve joint pain and stiffness- in some cases it has been observed to  prevent bone deformation. Additionally, Gold is used in treating cancer. Some anti-cancer drugs have trace amounts of gold in them that help to attack tumors.

Gold Side Effects: Gold has many side effects when used for medicinal purposes- Starting with skin rashes, a metallic taste in the mouth, mouth sores and thinning hair. More severe side effects of treatment include damage to your bone marrow, kidneys, liver, intestines and lungs.

Sources:

Monday, January 20, 2014

As


As
Arsenic
Atomic Number: 33
Atomic Weight: 74.92159

Element Classification: Semimetallic
Appearance: steel-gray, brittle semimetal

Uses: The main use of arsenic is for strengthening alloys of copper and lead . Arsenic is common in semiconductor electronic devices, such as car batteries, and is also used in the production of pesticides, herbicides, and insecticides.

Properties: Arsenic has a valence of -3, 0, +3, or +5. The elemental solid primarily occurs in two modifications, though other allotropes are reported. Gray arsenic is the usual stable form, with a melting point of 817°C. Arsenic and its compounds are poisonous.

Arsenic and Old Lace:  a play by Joseph Kesselring, written in 1939. Set in Brooklyn, the play is a comedy about a young man questioning his engagement and his two spinster aunts who have taken to murdering lonely old men by poisoning them with a glass of home-made elderberry wine laced with arsenic, strychnine, and "just a pinch" of cyanide.

Pollution: Widespread arsenic contamination of groundwater has led to a massive epidemic of arsenic poisoning in Bangladesh and neighboring countries. It is estimated that approximately 57 million people in the Bengal basin are drinking groundwater with arsenic concentrations elevated above the World Health Organization's standard of 10 parts per billion (ppb).

In the United States, arsenic is most commonly found in the ground waters of the southwest. Parts of New England, Michigan, Wisconsin, Minnesota and the Dakotas are also known to have significant concentrations of arsenic in ground water. Increased levels of skin cancer have been associated with arsenic exposure in Wisconsin.

Recent News: Air district officials in Los Angeles County filed a lawsuit Thursday seeking up to $40 million from  Exide Technologies, one of the world's largest manufacturers and recyclers of lead-acid batteries. Exicde has been accused of posing a health risk for emitting too much lead and arsenic, exposing tens of thousands of people to cancer-causing chemicals and has neglected to implement and pollution control systems. The plant, opened in the 1920s, smelts about 25,000 batteries a day. 


Sources:



http://www.latimes.com/local/lanow/la-me-ln-exide-battery-recycler-sued-20140116,0,2427141.story#ixzz2r08Oc0gG

http://en.wikipedia.org/wiki/Arsenic
http://en.wikipedia.org/wiki/Arsenic_poisoning

Recommended Reading:

http://www.scpr.org/blogs/environment/2014/01/10/15578/regulators-tighten-emission-limits-for-arsenic-oth/ utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+893KpccSouthernCaliforniaNews+(KPCC%3A+News)

Sunday, January 12, 2014

chemistry quiz week 1


1. Classify the following as either a chemical or physical change. 
Burning wood = chemical change

Crushing a rock = physical change

Dissolving sugar in water = "When water dissolves sugar, it interacts with the sugar but does not change it." 
*What? 

The rusting of iron = chemical change

2. Classify the following as to whether or not they are pure substances or mixtures.
milk = mixture

table salt = mixture

sugar = pure (mmmmmm)

steel = mixture

3. A cup of black coffee is considered to be __?__ and a/an __?__ substance.
Coffee is homogenous and impure

4. The boiling of water is considered to be a __?__ change and the temperature at which water boils is considered to be a __?__ property.
water boiling is a physical change and the temp at which it boils is a physical property.

bio



Sara is characterized by her obsessive, sometimes inappropriate curiosity. She loves to learn- about most anything really- so long as it strengthens her relationships with others and the universe. With an appreciation for varying ways of thinking, perceiving, and general sense-making, Sara treats everyone as a teacher and every experience as a lesson. She has a unusual sense of humor, lacking in the ability to remember jokes, but constantly cracking them. Really, humor just helps her learn. Chemistry & BioChemistry will  surely be an engaging lens from which to view and engage and just may turn Sara into a sharp shooting chem formula speaking smart aleck.