Friday, September 17, 2004

Made a Amici right angle adaptor yesterday - used Edmond Sci. prism
Rob purchased a Canon Rebel 300D today
Link

Friday, August 06, 2004

Got a bee sting on 8/6/04 ... (stinger not attached)
Bee Sting First Aid - Advice found includes the following, but what works best ? Sounds like a good area for a controlled study.
1- Meat Tenderizer -
neutralizes the venom - This sounds best to me ( have none today)
2- Wet aspirin applied to area (did next)
3- Ice
4- Wet Tobacco
5- Onion slice held on area
6- Ammonia applied to area (did first)
7- Soap and water
8- Mud
9- St. John's Wort
10- Baking Soda applied to area
Best single link = http://ny.essortment.com/howtotreatbee_prc.htm

Tuesday, July 27, 2004

Why am I getting email not addressed to me? - answer may be:
Blind carbon copying or "Bcc" can be useful if you are creating a mailing list, and you wish to ensure that the address of each of your recipients is kept private from the others. So a mailer can set the "To" header to be anything he or she wishes. He or she can then silently tell the mail server, by using the "Bcc," who the actual recipients are. Unfortunately, this feature can also be used by spammers for illegitimate purposes ...
the "To" header on messages (the line that normally contains your e-mail address, assuming it's a legitimate message) does not really determine where the message gets delivered. What does determine the recipient of the message is a command (or commands, if there are multiple recipients) sent to the mail server telling it where to send the mail. Unfortunately, these commands are ultimately hidden from the recipient's view, and do not show up anywhere in the mail headers once the message is finally delivered.
============================
My next camera may be.(
- too expensive!) .. News regarding Minolta's 7 D DSLR - Will use "A Mount lenses" - Pricing about as Canon EOS 10D, Nikon D100, etc. 6 Megapixel CCD APS-C sized CCD 1.5x focal factor Dynax 7 Layout Minolta A Mount Anti-Shake - 6 Megapixels, This is comparable with other models in this sector of the market. - APS-C sized sensor and 1.5x Focal Factor, a smaller CCD than the 35mm film size it extends the focal length by a factor of 1.5x, thus a 28mm lens becomes a 42mm and a 300mm becomes a 450mm. The Minolta A mount was introduced in 1985 and continues today. The product will become available in October, should there be any delays in development and testing this will be moved into early November. http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=008U15 -- The Maxxum 7000 was the very first body integrated auto focus SLR and was introduced in '85+
===============================
First came MSNbot, Microsoft's Web-spidering content bot that is part of its new MSN search initiative. Now, MSN is powering its media partner MSNBC's beta test of Newsbot, a customized search-driven news service. http://www.internetnews.com/ec-news/print.php/3386471

Tuesday, June 29, 2004

7-night CRUISE for $369? Turns out to be about $1100
Some details:
Service charge is (can be)automatically applied to your shipboard account. $10 per guest per day, ...
... not included, such as alcoholic beverages and soft drinks,
...Government taxes and fees are also not included.
... The current on board is 110 volts AC.
.... $3.95 per e-mail transmission, Terminal usage time $0.75 per minute
.... All suitcases are collected the night before we return to our home port, so be sure to bring an overnight bag.
.... U.S. and Canadian citizens must provide PROOF OF CITIZENSHIP and PROOF OF IDENTITY for boarding NCL cruises. PROOF OF CITIZENSHIP consists of one of the following:
Passport (preferred), (or ) Original or state certified copy of a birth certificate (photocopies are not accepted) .. and IDENTITY Valid driver's license that includes a photograph http://www.ncl.com/more/cruise_docs.htm
.... What about Shore Excursions? =DEAD LINK
... Port fee $218 - "Prices do not include taxes and port charges."
... Total > 1007 each, including air to Vancouver (+transportation to and from ship.)
... I checked Dockage and Passenger fees at San Fran, combined per passenger = $10-15.00
.... Class action lawsuits have been filed in the state courts of
California, Florida, and Washington State against seven cruise lines over allegedly over-charging port charges. The cruise lines named in the suit are Carnival, Royal Caribbean, Celebrity, Kloster Cruise Ltd. doing business as Norwegian Cruise Line, Holland America , Princess and Renaissance.
The suits allege that "port charges" increase the fares advertised by at least $100 to $150 per person and that the cruise lines have led the public to believe that "port charges" are costs charged to the cruise lines by governmental authorities - Ray LIGHTHOUSE TRAVEL 800-719-9917 or 805-566-3905
.. They do NOT pay commissions on port charges. There is one cruise line (Rennaissance) that charges $295 for port charges http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&safe=off&threadm=4llnss%24iq4%40ocean.silcom.com&rnum=7&prev=/groups%3Fq%3D%2520%2522port%2520charges%2522%2520cruise%26num%3D100%26hl%3Den%26lr%3D%26ie%3DUTF-8%26safe%3Doff%26sa%3DN%26tab%3Dwg

Saturday, June 26, 2004

Picgoo, a free web hosting service that provides free web hosting for your images or pictures for 6 months - then automatically deleted, a great way to avoid blot on my site (www.edhiker)


About Gmail at
http://www.gmailswap.com/index.html

Thursday, March 25, 2004

On the Wed hike, I was asked if the North Pole was Positive or Negative. It may be a matter of interpretation -- read on...

The north-seeking end of a magnet is in English-speaking countries called the north pole and the other end the south pole; in France the names are interchanged. The reason for this conflict in terminology can be traced to the early users of the compass. Knowing little about magnetic effects, they called the end of the compass needle that pointed towards the north geographical pole, the north pole of a compass. A north pole is reckoned as positive (+) and a south pole as negative... A pole which points north is reckoned positive, one which points south negative. http://66.102.7.104/search?q=cache:eV2nSOlj-_oJ:31.1911encyclopedia.org/M/MA/MAGNETISM.htm+north+pole+positive+pole+earth&hl=en&ie=UTF-8
Noun 1. positive magnetic pole - the pole of a magnet that points toward the north when the magnet is suspended freely http://www.thefreedictionary.com/positive%20magnetic%20pole

One of the first things we note in examining a bar magnet is that it has two region of magnetic concentration: poles at the ends of the magnet. We call these two poles north seeking N, and south seeking, S, since a compass needle was one of the earliest applications of magnetism. The N pole of a magnet, like a compass, points north, and the S pole points south. http://library.thinkquest.org/12632/electricity/magnetism.html

A magnet will align itself with Earth's magnetic field with one (the positive north seeking)
pointing towards the Earth's north pole and the other (the negative south seeking)
towards the south magnetic pole. http://www.geophysik.uni-koeln.de/studium/WS03/vorlesung/geoscience/chapter5.pdf

French magnets are marked N (being negative) and S (positive). S will seek the North and N, the south of a suspended French magnet. The N seeking pole of a compass needle will be repelled by the N marked pole of an English or German bar-magnet, and will be attracted by the N marked pole of a French magnet. http://216.239.53.104/search?q=cache:ajLpgs6pd7UJ:www.meridianinstitute.com/eaem/abrams1/abr1ch3.html+English-speaking+north-seeking+end+of+a+magnet&hl=en&ie=UTF-8

Note that since the north pole of the magnet is attracted to the south pole of another magnet, the Earth's geographic north is actually a magnetic south. The overall geomagnetic field is becoming weaker at a rate which will cause the field to disappear, albeit temporarily, by about 4000 AD. Other sources have put the date of field collapse as early as 3000 AD. http://en.wikipedia.org/wiki/Magnet

Definition: POSITIVE MAGNETIC POLE [n] the pole of a magnet that points toward the north when the magnet is suspended freely. Synonyms: north-seeking pole, positive
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040510 - I found out that Google owns Blogger -- 2003 January - February Google acquires Pyra Labs, creator of web self-publishing tool Blogger.

Thursday, March 18, 2004

Google - Find local businesses and services on the web. (show URL )
A purchasing manager should know about this -- works great! Gives maps.

New! Find stores in your neighborhood. Try Google Local.

Google - Find local businesses and services on the web.
http://local.google.com/local?q=pizza&num=20&hl=en&lr=&ie=UTF-8&sa=G&near=10426+glory+ave+91042&dm=full

Friday, January 30, 2004

Shuttle, Mars, and Hubble

Many links at http://edhiker.home.comcast.net/ShuttleMarsHubble.html

Feet, miles, nautical miles, pounds, etc. still on NASA sites! In 1902 legislation requiring the federal government to use metric exclusively was defeated by a single vote.

NASA cancels Hubble Telescope , due to directive to retire the shuttle by 2010. Hello, Mars ... Goodbye Hubble, the resources will now go into human exploration program. The decision prompted dismay and anger among astronomers across the nation. Hubble is doing the best science ever, but a shuttle is too unsafe for flight to the Hubble. NASA officials decided that a backup would have to be ready to help any shuttle going anywhere but the International Space Station. So what happens now? -- Public Bombards Operators to Save Hubble

NASA policy is confusing. Below are some points found in the many articles that have appeared following president Bush's new Space Initiative.

One less flight also means one less chance for another shuttle disaster. NASA will not risk astronauts or shuttles on another mission to upgrade Hubble Space Telescope, widely considered the most successful science spacecraft ever. The planned mission to Hubble was the only flight scheduled to go somewhere other than the station. Bush's plan is to shift $11 billion NASA is now spending on other projects to the new Moon-Mars program. Bush stated that all human spaceflight would be directed to support the effort of putting people on the Moon and Mars. The shuttle, which is the only means by which NASA could service Hubble, is to be devoted to finishing construction of the space station. The danger inherent in sending a space shuttle to maintain Hubble pales in comparison with the danger of sending astronauts to the moon and Mars. It’s as though the agency were abandoning hopscotch for fear of tripping, to concentrate instead on sky diving.

"The tragedy is that the Hubble Space Telescope is better now than it ever was before," said astronomer Tom Brown, 34, instrument scientist for the now-grounded Wide Field Camera 3. "It's like shooting a prize-winning thoroughbred when it's about to win the Triple Crown." What really astonishes me is how the president can talk about the moon and Mars while pulling the plug on the Hubble Space Telescope. Is this the Bush vision? Where is Bush's curiosity? The Hubble Space Telescope is the greatest individual scientific instrument of all time.

In a Jan. 21 letter to NASA Administrator Sean O’Keefe, Mikulski, the ranking minority member of the Senate Appropriations subcommittee that oversees NASA’s budget, askeds the space agency chief to reconsider his decision. Mikulski also asked O’Keefe to appoint an independent panel of outside experts to assess all the ins and outs of conducting another space shuttle mission to Hubble.

NASA is making "uneven" progress in the steps required before it can fly another mission, too soon to schedule the next flight. NASA, which first spoke of resuming flights this spring, now hopes for September or October. NASA has decided to launch only during the day. NASA's administrator, Sean O'Keefe, has repeatedly promised to follow all recommendations of the accident board. Some space experts think NASA is too stodgy and incompetent to create a new spacecraft, what type of vehicle is still a mystery. NASA officials say they don't know whether it would be reusable or single-use; whether it would touch down on land or sea; or whether it would have wings. Others say the agency has the technical know-how — just not the cash. Some former members of NASA's Aerospace Safety Advisory Panel worry that too many resources will be diverted from the space station as NASA reshifts its focus.

Bush Vision Was Key to Saving NASA from Budget Cuts (political)

"The real future of the international space station is still to be determined," said Michael Kostelnik, a NASA administrator who oversees the space shuttle and space station programs.

The Hubble has done more to advance understanding of the universe than any other space mission. This is the true adventure of the human spirit.

Too unsafe to fly to the Hubble?

Was the Atlantic too unsafe for Columbus? How do we discover without taking some risk?

Ed's proposal - fly to the Hubble in two steps, first to a parking orbit where inspection takes place, then a final boost to the Hubble Telescope. Inspection at the Space Station will not work for missions using US preferred inclinations near 28 degrees, the plane change needs a velocity impulse of about 3 km/s, about ten times as much as the shuttle orbital maneuvering system has. Space Station is in an orbit inclined 51.6 degrees to the equator. (Before the Russians joined the program, the Space Station was to be in a 28.5 degree orbit, same as Hubble). The most efficient orbit out of Russia's Baikonour results in an inclination to the equator of 51.6 degrees.

Inspection of Space Shuttle Tiles in orbit -- A free-flying television camera, the Autonomous EVA Robotic Camera (AERCam) was developed to perform visual and non-visual inspection activities around orbiting parent spacecraft. I believe it may have been possible to save the astronauts if inspection showed high danger. Looking ahead to future missions, on seeing trouble, take off the astronauts and (try to)land shuttle on autopilot. More at Free Flying Servicers -- See also: PSA red globe , however, Yuri Gawdiak, the inventor of this smaller device says the PSA is designed for internal operations only. I would want to inspect my Space Shuttle before deorbit if I were flying it! (posted at http://edhiker.home.comcast.net/bestwebsites.html 2/4/03)

Ed Johnson

1/29/04

Saturday, December 13, 2003

Activities- 5:18a mag8 iridium flare seen - 3" telescope view of jupiter, Saturn, moon.
940 get up to call Elaine, she calls first. setup sundial, breakfest, read paper - flu is headline - has good diff diagnosis from CDC cild vs flu. Fry's ad has several things to check.
1025 turn on computer - ck mails, news Cheaper Chiba holds its own against cute iPod

Friday, November 07, 2003

Eclipse Sat eve will be partial at Ed's place, will not rise above local hill till 6:00pm. The moon will be one-quarter out of the umbra, 13 degrees high, at azimuth 79 degrees.
This is the very last total eclipse of Saros 126. This series produced thirteen total lunar eclipses during the past 234 years
Saros - a period of 223 lunations or synodic months (6585.3216 days or 18.03 years). Eclipses separated by one saros share nearly identical characteristics.
Smart and Final dosen't carry plain applesauce or almonds.
Bank said to come back Dec 18 or the week after for my money.
My list of "most viewed"

Sun White Light - large http://www.nso.edu/VIDEOIMG/isoon/latest_w.jpg
Sun UV http://www.space.com/spacewatch/sun_cam.html

CAM Mt. Wilson 150 Foot Towercam http://www.astro.ucla.edu/~obs/towercam.htm
CAM Griffith Observatory http://38.185.126.101/griffith/griffith.htm

Weather - 1 km Visible Animation http://www.wrh.noaa.gov/Oxnard/javaLinks/animation.1km.vis.html

Weather - LOS ANGELES COUNTY VALLEYS http://www.wrh.noaa.gov/afos/SplitData/LAX/ZFP/ZFPCAZ047
from Forecasts for Southwestern California at http://www.nwsla.noaa.gov/forecast.html

Weather Underground: Burbank, California Forecast 5 day-- moon rise/set
http://www.wunderground.com/US/CA/Burbank.html

ASTROMART Classifieds http://www.astromart.com/categories.asp

ASTRO NEWS - Arkansas Sky Observatory http://www.arksky.org/index.htm

Sky and Telescope - News http://skyandtelescope.com/news/
Comet Observation Home Page http://encke.jpl.nasa.gov/
Space Calendar (JPL): http://www.jpl.nasa.gov/calendar/
JPL Lectures http://www.jpl.nasa.gov/events/lectures.cfm

Spaceflight Now - Worldwide launch schedule http://spaceflightnow.com/tracking/index.html

SKY & Iridium Satellite Visibility - Ed's Place http://www.heavens-above.com/main.asp?lat=34.258&lng=-118.280&loc=Ed%27s+Place%2C+Tujunga&TZ=PST


Yahoo! Groups (all) http://groups.yahoo.com/mygroups
Today, I will go to Smart and Final, get tomato juce and apple sauce, then to the library to get a new card. Will order Telescope Optics by: Rutten and Van Venrooij published by Willmen Bell, 1988
Next to bank and get some play money so I can show Elaine a good time. The bank wants to hear from me.
Von's is next to the bank, so will see what they have.
On 11/6/03, I found the following things about cooking. Much needs to be found about how cooking affects food. ---

Veggies Lose Antioxidants in the Microwave
Blanching and freezing also robs them, study finds

By Amanda Gardner
HealthDay Reporter

THURSDAY, Oct. 16 (HealthDayNews) -- Getting the necessary nutrients from vegetables may be even harder than you thought.

New research shows that different ways of preparing, storing and processing vegetables can affect how good they are for you.

Broccoli, for instance, can lose as much as 97 percent of some antioxidants, or cancer-fighting compounds, when it is zapped in the microwave.

Vegetables that are blanched before freezing (a common processing technique) can lose up to one third of their antioxidants. Frozen storage can also cause losses, albeit much smaller ones.

Two studies detailing these findings appear in the November issue of the Journal of the Science of Food and Agriculture.

Antioxidants are plentiful in vegetables and work to eliminate free radicals, which can damage cell DNA and contribute to various diseases. That's why eating fiber, fruits, and vegetables, all of which contain antioxidants, can help prevent cancer and cardiovascular disease.

As it turns out, though, that protective effect is most pronounced when the vegetable is in its natural state.

The first study found that the simplest cooking method was also the worst when it came to preserving nutrients. Broccoli lost 97 percent of flavonoids, 74 percent of sinapics and 87 percent of caffeoyl-quinic derivatives (three different types of antioxidants) when it was microwaved.

When boiled the conventional way (i.e., not in a pressure-cooker), this green lost 66 percent of its flavonoids; when tossed in a pressure cooker, broccoli lost 47 percent of its caffeoyl-quinic acid derivatives.

Steamed broccoli, on the other hand, lost only 11 percent, 0 percent and 8 percent, respectively, of flavonoids, sinapics, and caffeoyl-quinic derivatives.

The advantage of steaming vs. conventional boiling is that you're "not using water directly in contact with the vegetable. The nutritional compounds don't go into the water," says Cristina Garcia-Viguera, lead author of this paper. "Once the compounds are in the water, the temperature destroys them much easier."

A microwave wreaks havoc because it heats the inside of the vegetable. That, combined with the fact that you normally use water when microwaving, causes the destruction of valuable nutrients.

Even reheating steamed broccoli in a microwave would probably have the same effect, Garcia-Viguera says, although she did not specifically examine this in her research.

The findings can probably be extrapolated to many other vegetables but, again, the researchers did not specifically address this.

The second study looked at the effects of blanching and freezing and of long-term freezer storage on more than 20 common vegetables. As it turned out, different species showed different effects from these processing techniques.

In general, dietary fiber components were not affected or even went up slightly. Mineral content, also, tended to remain stable.

On the other hand, antioxidant activity went down 20 percent to 30 percent during blanching.

Carrots, peas, and broccoli lost 30 percent of their vitamin C during blanching/freezing, while green beans lost 10 percent and spinach lost 40 percent (with an additional 30 percent lost during deep frozen storage).

Spinach also lost almost 40 percent of its potassium and 70 percent of its folic acid during blanching.

Don't despair just yet, says Samantha Heller, a senior clinical nutritionist at New York University Medical Center in New York City.

The use of these vegetables in the studies meant they were nutritious in the first place, she says. "Then I'm still reaping the benefits even if they're losing some of their qualitative values," she says.

Moreover, Heller points out, not all of the healthy properties of vegetables are being eliminated. "You're still getting plenty of healthy compounds as well as fiber, so there's absolutely no reason not to eat vegetables -- although, of course, the fresher the better," she says.

"If people are willing to have vegetables anyway, shape or form, even if they are going to nuke then, I'd rather have them do that," she adds.

More information

For more on eating enough fruits and vegetables, visit the Centers for Disease Control and Prevention. The American Dietetic Association has a series of nutrition fact sheets.

What goes on when you microwave food? Read about it at HowStuffWorks.



SOURCES: Cristina Garcia-Viguera, Ph.D., department of food science and technology, CEBAS-CSIC, Murcia, Spain; Samantha Heller, M.S., R.D., senior clinical nutritionist, New York University Medical Center, New York; November 2003 Journal of the Science of Food and Agriculture

Copyright © 2003 ScoutNews, LLC. All rights reserved.

**********************************************************************

Bake, fry or boil: which is best?
By Alice Hart-Davis, Evening Standard

You may pick out healthy food in the shops but the method you choose to cook it could rid it of all its goodness. Alice Hart-Davis asks the experts for their top tips on how to get the most from your food.

Baking: Wrapping fish in foil and baking it is a good way to cook it - as long as the oven isn't too hot. "High temperatures alter the biochemical structure of the essential fats in the fish," warns nutritionist Ian Marber. "Cook fish at a lower temperature, but for longer."

Baking is also a good way to cook potatoes, says Frankie Phillips, nutrition scientist at the British Nutrition Foundation, because people usually eat the skin, which is rich in fibre and helps the cooked potatoes retain their vitamin C content.

Boiling: "Cut vegetables into larger pieces," says nutritionist Alison Loftus, "as it reduces the surface area through which water-soluble vitamins such as B and C can leach out. Boil them for as short a time as possible, and don't keep them hot for hours as prolonged heating destroys folates, which have an important role in preventing heart disease."

Steaming: "The preferred way to cook vegetables," says Marber. "You lose fewer nutrients and retain fibre, which is crucial for clearing excess toxins and cholesterol from the body and for keeping your bowels moving."

Frying: Frying results in fatty food which is high in calories and not a good thing. Then there's the question of what you fry things in.

"When you heat oils to high temperatures, their chemical structure gets deformed," says Loftus. "It used to be thought that olive oil didn't deform in the way that unsaturated fats such as sesame seed oil or sunflower oil did, but it does, which encourages free radical damage in the body and can cause premature ageing."

Perversely, butter or unrefined coconut oil is a better option for frying, even though they are saturated fats which we have been taught to avoid hitherto.

Deep frying: This method adds fat to food, and causes the formation of acrylamide particles, though more research is needed on quite what these do to the body. On the plus side, says Phillips, if the oil is sufficiently hot, thick-cut deep-fried chips will retain a good proportion of their vitamin C, because the cooking method seals the surfaces fast.

Roasting: A simple and effective way to cook meat and vegetables such as peppers, onions and aubergines. But be careful not to burn the food, advises Marber, as it is all too easy for food to end up charred or singed at the edges.

"Anything burnt is carcinogenic," he points out. "Burnt particles of food give rise to free radicals in the body, more than are matched by the amount of antioxidants contained in the vegetables you are eating."

Grilling: "It's a good way to cook many foods because you're not adding fat," says Phillips. "As long as you don't burn the food," adds Marber. "The trouble is, we like to cook things until they are brown, at which point they will be close to charring."

Microwaving: "Don't lose your perspective," says Marber. "In nutrition, everything is a question of balance. Yes, microwaving affects the nutritional content of vegetables, but if you only cook them until they are crisp, they will still retain their fibre content." And, as Phillips points out, if the convenience factor of microwaving means that it encourages people to eat vegetables that they otherwise wouldn't eat, then that is a good thing.

• Ian Marber, The Food Doctor (020 7792 6700; www.thefooddoctor.com). Alison Loftus, Hale Clinic (0870 167 6667). British Nutrition Foundation (020 7404 6504; www.nutrition.org.uk).

************************************************

Is Cooking Hazardous to Health?

by Ben Best

Most scientific papers addressing the subject of the health hazards of cooking focus on carcinogens in cooked meat. One exception [BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 53:259-266 (1994)] describes the leaching of Fe, Cr & Ni into food which has been cooked in stainless steel. In THE 120-YEAR DIET Roy Walford mentions toxic agents created from cooking egg yolks. There are undoubtedly many peroxidized lipids produced from cooking of unsaturated fats which are harmful in ways other than by carcinogenesis, but since I have not located literature on the subject this essay will focus on mutagens.

The most mutagenic known agents in cooking are heterocyclic amines, found in "well-cooked" beef, pork, chicken and fish muscle (typically cooked at temperatures just above 200ºC). Mutagens are also found in "barbacued samples, cooked at higher temperatures over an open flame". The nature of these substances are mostly undetermined, but it is known that they are not heterocyclic amines. [FOOD AND CHEMICAL TOXICOLOGY 32 (7):595-603 (1994)].

Concerning cooking methods, one paper states that "The relative mutagen activity of cooking processes with muscle meats show that frying, broiling and barbecuing produce more mutagenic activity and HAs [Heterocyclic Amines], where analyzed, and that stewing, steaming and poaching show little or no mutagenic activity...Microwave cooked meats are generally low in mutagenic activity, but a study by Barrington et. al. (11) generated appreciable mutagenic activity in sirloin steak." [CARCINOGENS 16(1): 39-52 (1995)].

Gas flames generate NO2, which can result in high levels of carcinogenic nitrosamines & nitropyrenes in foods cooked in gas ovens [CANCER LETTERS 25:239 (1985) and MUTATION RESEARCH 171:105 (1986)]. The inhaling of air in kitchens using gas-cooking may lead to the presence of dimethylnitrosamine in human urine [CANCER RESEARCH 46:5392 (1986)].

One thoroughly-referenced review (about 150 references) -- "Cooking Procedures and Food Mutagens: A Literature Review" [FOOD AND CHEMICAL TOXICOLOGY 31(9):655-675 (1993)] -- also focuses on the mutagenicity of cooked meats due to heterocyclic amines. Non-enzymatic glycosylation is a mechanism of aging, but it is evidently also a mechanism for the creation of mutagenic heterocyclic amines in cooked meats.

The necessary mutagenic ingredients are: high temperature of extended duration, free amino acids, creatine (or creatinine) and sugar. The creatinine, glycogen and free amino acids in meat cause the sugar to catalyze the cross-linking of the free amino acids to form the heterocyclic amines (a Maillard reaction). Few mutagens were formed if glucose was not present and "Bovine liver and kidney contained low concentrations of creatine and shared no mutagenic activity after frying". Moreover, in the cooking of "other protein-rich foods such as cheese, tofu, beans, shrimp and tissue from inner organs, the mutagenic activity was negligible." In model systems where there was protein without free amino acids, "no mutagenic activity was detected". ("Mutagenic activity" nowadays is usually detected by bacterial assays -- the Ames test.)

Concerning temperature and duration, "Domestic frying and broiling are usually performed at temperatures between 150ºC and 200ºC for 5-15 minutes, oven roasting often takes place at 125-200ºC for 30-60 minutes, whereas stewing and microwave cooking involve temperatures in the range of 100ºC to 150ºC. However, most frying and broiling experiments cited in the literature have been performed at temperatures of 200ºC or above.

"In model systems also, the mutagenic activity is related to the temperature in the range of 150ºC to 200ºC. When a mixture of glycine, creatine and glucose was heated at 140ºC for 15 minutes, no significant mutagenic activity was produced, but at 160ºC and 180ºC, mutagenic activity was detected."

I conclude from the above that microwave cooking is one of the safest ways to cook. This is in agreement with my intuitive sense that heat that penetrates somewhat uniformly is far less damaging than high temperature applied to the surface of food in order to cook the inside in an acceptable time-frame. Cooking with fats, of course, results in the production of free radicals & other carcinogens.

I try to keep my cooking to a minimum. The most practical use of cooking is to kill microorganisms in meat to make it safe to eat. I only eat meat occasionally -- meat contains too many pesticides and too much saturated fat which elevates LDL cholesterol (increasing vulnerability to cardiovascular disease.) Otherwise, cooking simply reduces the nutritional content of foods while making food more palatable. For a person seeking to practice CRAN (Caloric Restriction with Adequate Nutrition) -- or anyone wanting to keep weight down -- food is already too appetizing.

I believe that adequate nutrition can be achieved without cooking or meat. A diet containing lots of fresh fruits & vegetables that includes low-fat dairy products & nutritional supplements (including essential fatty acids and whey protein) will supply ample nutrition without the time-wasting cooking and high level of pesticides & saturated fats.


http://www.edhiker.com