Acrolein Main Cigarette Culprit?

Byoliveridley

Chemical & Engineering News: Latest News – Cigarettes’ Smoking Gun?

Acrolein, one of the 4,000 constituents of cigarette smoke, has been found unexpectedly to cause DNA damage in the gene for the infamous tumor-suppressor p53, which is often disrupted by cancer. In particular, the pattern of DNA mutations caused by acrolein mimics what is often found in human lung cancer samples (Proc. Natl. Acad. Sci. USA, DOI: 10.1073/pnas.0607031103).

“If cigarette smoke is the weapon that causes lung cancer, then these mutations are fingerprints on the knife,” says author Moon-shong Tang of New York University School of Medicine, in Tuxedo. Tang was also involved in identifying another cigarette-smoke component that can induce such mutations: a metabolite of a polycyclic hydrocarbon called benzo[a]pyrene. Acrolein is present in cigarette smoke in levels of up to 1,000 times greater than benzo[a]pyrene.

So, if you remove acrolein from tobacco smoke, does that make for a much safer smoking experience? Is this a research question worth answering? FYI, I watched Thank You for Smoking last night, so, fresh on my mind!

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Imagine a world covered with solar cells

Byoliveridley

it could happen soon, imagine your car parked in the sun with a plastic solar coating on the roof. Imagine every building surface generating clean electrical energy. Well, it could happen very soon (if hyperbolic sciencedaily press releases are to be believed, at any rate!).

ScienceDaily: New Plastic Solar Cell Breaks Efficiency Record

In order to be considered a viable technology for commercial use, solar cells must be able to convert about 8 percent of the energy in sunlight to electricity. Wake Forest researchers hope to reach 10 percent in the next year, said Carroll, who is also associate professor of physics at Wake Forest.

Because they are flexible and easy to work with, plastic solar cells could be used as a replacement for roof tiling or home siding products or incorporated into traditional building facades. These energy harvesting devices could also be placed on automobiles. Since plastic solar cells are much lighter than the silicon solar panels structures do not have to be reinforced to support additional weight.

Screw ethanol, put all your energy into developing solar and wind energy, battery technology and electric vehicles. See how much better an idea that is compared to corn ethanol.

Rising Temperatures Affect Indian Crop Yields

Byoliveridley

feb-temp.jpgThis story in the Indian Express talks about unusually warm February weather affecting wheat yields in Punjab and Haryana (India’s breadbasket, BTW). This will become more and more common as average temperatures rise from Global Warming. From Lester Brown’s most informative book Plan B 2.0:

Two scientists in India, K.S. Kavi Kumar and Jyoti Parikh, assessed the effect of higher temperatures on wheat and rice yields. Basing their model on data from 10 sites, they concluded that in north India a 1-degree Celsius rise in mean temperature did not meaningfully reduce wheat yields, but a 2-degree rise lowered yields at almost all the sites. When they looked at temperature change alone, a 2-degree Celsius rise led to a decline in irrigated wheat yields ranging from 37 percent to 58 percent. When they combined the negative effects of higher temperature with the positive effects of CO2 fertilization, the decline in yields among the various sites ranged from 8 percent to 38 percent. For a country projected to add 500 million people by mid-century, this is a troubling prospect

We might as well accept that this is going to happen and plan
accordingly. I guess changing the variety would help, so would shifting the growing season a little (I am no crop scientist, so I need to read about this).

Hansen on understating sea level rise due to climate change

Byoliveridley

Hansen, the grandfather of all climate research has an essay today in the open access journal Environmental Research Letters arguing that scientists are not communicating the seriousness of sea level rise. And, it is open access, so, no kidney sale required!

Scientific reticence and sea level rise

I suggest that a `scientific reticence’ is inhibiting the communication of a threat of a potentially large sea level rise. Delay is dangerous because of system inertias that could create a situation with future sea level changes out of our control. I argue for calling together a panel of scientific leaders to hear evidence and issue a prompt plain-written report on current understanding of the sea level change issue.

In this paper, Hansen reviews a number of recent studies that point to positive feedback in ice melting (remember, poitive feedback, good for morale, not good for climate change). Hansen then points out that due to these feedback mechanisms, sea level rise is non-linear. His thesis is that all this information is known to most climate scientists, and to a lot of people who maintain even a cursory interest in the matter.

He finishes with a call to action.

There is, in my opinion, a huge gap between what is understood about human-made global warming and its consequences, and what is known by the people who most need to know, the public and policy makers. The IPCC is doing a commendable job, but we need something more. Given the reticence that the IPCC necessarily exhibits, there need to be supplementary mechanisms. The onus, it seems to me, falls on us scientists as a community.

Important decisions are being made now and in the near future. An example is the large number of new efforts to make liquid fuels from coal, and a resurgence of plans for energy-intensive `cooking’ of tar-shale mountains to squeeze out liquid hydrocarbon fuels. These are just the sort of actions needed to preserve a BAU greenhouse gas path indefinitely. We know enough about the carbon cycle to say that at least of the order of a quarter of the CO2 emitted in burning fossil fuels under a BAU scenario will stay in the air for an eternity, the latter defined practically as more than 500 years. Readily available conventional oil and gas are enough to take atmospheric CO2 to a level of the order of 450 ppm.

In this circumstance it seems vital that we provide the best information we can about the threat to the great ice sheets posed by human-made climate change. This information, and appropriate caveats, should be provided publicly, and in plain language. The best suggestion I can think of is for the National Academy of Sciences to carry out a study, in the tradition of the Charney and Cicerone reports on global warming. I would be glad to hear alternative suggestions.

Do we need another study? As we wait for the National Academy of Sciences to conduct a study on how best to communicate the danger of sea level rise, many more villages in India and Bangladesh will go under the sea. Apparently, the sea cannot wait for the best communication strategies. It communicates the only way it can, directly!!

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Lead from toys not the real problem

Byoliveridley

Here’s what happens when you make a long verbal rant to someone about how the risk of lead exposure from water and air probably exceeds the risk from toys with lead paint, and then don’t blog about it because that means doing an hour or two of research and you don’t find the time… Someone else has the same notion, and actually writes about it AND gets published in a mainstream website!

The lingering danger to children from lead. – By Darshak Sanghavi – Slate Magazine

While tainted toys are in the news now, kids historically have gotten lead from two sources: the atmosphere and house paint. Roughly a quarter-million tons of lead compounds entered the atmosphere annually beginning in 1922, after a General Motors scientist developed a lead-based gasoline additive that prevented auto knocking. Lead’s chemical durability, recognized centuries ago, also made it an attractive paint additive. Toddlers are particularly susceptible to eating lead paint because it has a sugary taste; ancient Romans used lead powder to sweeten wine. By 1980, more than half a million American children—4 percent of all toddlers—had quite toxic blood lead levels from these sources.

Lead is a serious problem in the US, and the bulk of exposure is from crumbling infrastructure, the inability (or unwillingness) to fix and replace decaying lead pipes, and the still ubiquitous presence of lead paint layers in older houses.

The article doesn’t still give you exposure comparisons or numbers, so I guess I still have to do the work.

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The U.S Emperor's new edict on regulation

Byoliveridley

Wow, plutocracy-protectionary principle alert.

Chemical & Engineering News: Latest News – Changing The Rules On Regulations

A new directive from President George W. Bush to federal agencies adds layers of bureaucracy to the process of issuing regulations and gives the White House greater control over agencies’ rules. Critics say the directive, issued Jan. 18, will slow down regulation. They say it also shifts regulatory priorities, which were set by Congress in federal laws, away from protection of health and environment to economic rationales. Some industry groups, including the U.S. Chamber of Commerce, praise the directive. “It’s the first truly significant attempt by an Administration to hold federal bureaucrats to account and insist they act with discretion when imposing new and expensive burdens on businesses and consumers,” says William Kovacs, the chamber’s vice president of environment, energy, and regulatory affairs. Under the new directive, agencies can regulate only when they can demonstrate to the White House Office of Management & Budget (OMB) that the free market is not producing the desired results of the rule, such as health protection. To show that a new rule is warranted, agencies must identify what economists call “market failures”—such as when an industrial sector with unfettered pollution sells its products more cheaply than it would have had it included the cost of pollution control into the price of its goods.

Sounds reasonable, does it not! All the good buzzwords thrown in there, “Cost-Benefit Analysis”, “Market Failure”, etc. But note that the burden of proof is on the regulating body to come up with a clearcut “proof” before passing regulation.

In addition, the directive requires each agency to have a presidentially appointed “regulatory policy officer.” The agency cannot begin work on a new rule—even one required by Congress through a law—until it gets a green light from its regulatory policy officer or unless the head of the agency gives approval.

The Emperor gets to appoint a viceroy to police the agency to ensure that no such regulation will get passed.

Note the modus operandi:

  1. Appoint lackey to head agency
  2. Appoint viceroy to oversee regulation
  3. Rewrite rules to increase power of executive over legislative
  4. Shift burden of proof away from the regulated to the regulators
  5. Slash budgets so regulating agencies cannot do the work adequately
  6. Hound competent employees out of the agency
  7. Routinely bash said agency as an example of “big government”. Repeat steps 4-7 as often as necessary to ensure “success”

Banana republic, indeed.