Wednesday, September 21, 2005

Mg

The essentials


Here is a brief description of magnesium.

  • Standard state: solid at 298 K
  • Colour: silvery white
  • Classification: Metallic
  • Availability: magnesium is available in several forms including chips, granules, powder, rod, foil, sheet, rod, turnings, and ribbon.

Magnesium is a grayish-white, fairly tough metal.

magnesium rods
Small and large samples of magnesium rod like this, as well as foil and sheet, (and magnesium alloy in foil form) can be purchased via their web catalogue from

Magnesium is the eighth most abundant element in the earth's crust although not found in it's elemental form. It is a Group 2 element (Group IIA in older labelling schemes). Group 2 elements are called alkaline earth metals.

Magnesium tarnishes slightly in air, and finely divided magnesium readily ignites upon heating in air and burns with a dazzling white flame. Normally magnesium is coated with a layer of oxide, MgO, that protects magnesium from air and water.



the result of setting off a mixture of magnesium metal with solid silver nitrate with water!
The picture above shows the result of setting off a mixture of magnesium metal with solid silver nitrate with water! Do not attempt this reaction unless are a professionally qualified chemist and you have carried out a legally satisfactory hazard assessment. Select a movie icon to see the result of setting off a mixture of magnesium metal and solid silver nitrate with water!

The picture shows the colour arising from adding magnesium powder to a burning mixture of potassium chlorate and sucrose.

Magnesium metal burns with a very bright light. The picture above shows the colour arising from adding magnesium powder to a burning mixture of potassium chlorate and sucrose. Do not attempt this reaction unless are a professionally qualified chemist and you have carried out a legally satisfactory hazard assessment.

Magnesium is an important element for plant and animal life. Chlorophylls are porphyrins based upon magnesium. The adult human daily requirement of magnesium is about 0.3 g day-1.

Isolation

Here is a brief summary of the isolation of magnesium.

Magnesium can be made commercially by several processes and would not normally be made in the laboratory because of its ready availability. There are massive amounts of magnesium in seawater. This can be recovered as magnesium chloride, MgCl2 through reaction with calcium oxide, CaO.

CaO + H2O Ca2+ + 2OH-

Mg2+ + 2OH- Mg(OH)2

Mg(OH)2 + 2HCl MgCl2 + 2H2O

Electrolysis of hot molten MgCl2 affords magnesium as a liquid whih is poured off and chlorine gas.

cathode: Mg2+(l) + 2e- Mg anode: Cl-(l) 1/2Cl2 (g) + e-

The other methos used to produce magnesium is non electrolytic and involves dolomite, [MgCa(CO3)2], an important magnesium mineral. This is "calcined" by heating to form calcined dolomite, MgO.CaO, and this reacted with ferrosilicon alloy.

2[MgO.CaO] + FeSi 2Mg + Ca2SiO4 + Fe

The magnesium may be distilled out from this mixture of products.

Let me see

Music Video Codes By VideoCodeZone.com

Tuesday, September 13, 2005

Andi Huff

A girl just killded her self yesterday at my school, I was about 40 feet away when she did it, and then 35 feet away when she was found. Well All the Yamhill people, just keep doing what you are doing, and Pray for everyone else.

Monday, September 05, 2005

Dam Gov

From the (UK) Times Onlines



(c) 2005 Cross Bone Productions

A child's toy hangs from electricity cables high above the streets of Lakeshore in Mississippi (Richard Pohle/The Times)

Our terrifying ordeal
By Sean O'Neil and Joanna Bale


TWO words on the boarding pass that secured Will Nelson a club-class seat on a flight from Dallas to Gatwick tell everything about the last week of his summer in America.

Alongside the flight details is stamped: “Hurricane Evacuee”.

Mr Nelson, and other Britons returning from New Orleans yesterday, will keep the boarding passes as souvenirs of the most frightening experience of their lives, being trapped in the city’s Superdome stadium.

As the first Britons caught by Hurricane Katrina returned home, the US authorities said that all 240,000 residents of New Orleans would have to leave before it could be rebuilt.

The death toll is likely to run into thousands and the Foreign and Commonwealth Office said that 131 Britons were still unaccounted for. However it emphasised that many are likely to be safe and could have left the disaster area days ago.

During seemingly endless days and sleepless nights, the British survivors’ fear of the hurricane’s destructive force was transformed into terror of the other survivors.

Mr Nelson, 21, and Jane Wheeldon, 20, told The Times how they and some 50 other foreigners — many of them British backpackers — were ordered by the US Army to gather together to protect themselves from resentful locals.

“The army told us to stick in a group and for the women to sit in the middle with the men around the outside and to be ready to defend ourselves,” Mr Nelson, from Epsom, Surrey, said. “Their urgency scared us. I sat on the outside, really scared by this point, sitting waiting for God knows what. We waited and waited, I didn’t sleep. A lot of the girls had been groped.”

Miss Wheeldon, from Carmarthen, South Wales, said that being inside the Superdome was terrifying and that she had been sexually harassed.

“The atmosphere was extremely intimidating,” the Lancaster University student said. “People stared at us all the time and men would come up to me and stroke my stomach and bottom. They would also say horrible, suggestive things. The worst time came when there was a rumour that a white man had raped a black woman. We were scared that we would be raped, robbed, or both. People were arguing, fighting and being arrested all the time.”

The “internationals”, as the army labelled the stranded tourists, were among the few white people in the stadium. Marked out by their skin colour and unfamiliar accents, they were verbally abused, while their luggage made them targets for robbery.

Mr Nelson said that local people also noticed that they received preferential treatment from the guards who gave them ration packs and water to help them to avoid food queues.

Mr Nelson, who graduated from Loughborough University in June, said: “The queues for the rations got more and more crazy. People were desperate.

“The physical conditions were horrible. It was stiflingly hot, you were sweating constantly. The smell was awful, a mix of sweat, faeces, urine — just a horrible, horrible smell.

“When the water stopped and the toilets packed up, it just got worse and worse. I can still smell it; it makes me gag.”

Miss Wheeldon said: “The sights we saw you wouldn’t want anyone to see. The filth and smell were unbelievable.” The threat came from a minor-ity — mainly young men. “The majority of the people of New Orleans are absolutely lovely,” she said. “Some families were ready to give us their food even though they had nothing.”

One of the most dangerous periods came on Wednesday when the military decided that the internationals should be removed for their own safety.

Officers told them to organise themselves in groups of five and make their way to an exit. The leaders were given a blue wristband and made accountable for the others. Mr Nelson’s was still on his arm yesterday.

He said: “The people around us were suspicious and resentful. They asked where we were going and we lied. We said that we were going to sit somewhere else. I walked off, head down, tunnel vision, I didn’t stop to think. I felt guilty but there was also a tremendous sense of relief that I was getting out of there.”

The tourists were taken to an emergency medical centre where many volunteered to help. “There were very few medics and we were able to help with feeding people, carrying stretchers and just talking to people who had lost their whole lives,” said Mr Nelson. “That night we saw a soldier brought in from the dome who had been shot in the leg.”

The Britons were taken on to Dallas the following day, seeing for the first time the full devastation caused by the hurricane.

Mr Nelson said: “I knew I was going home eventually, I knew I had a family home to go to and I knew where my family was and that they were safe. I realised just how lucky I was compared to many of the people we had left behind.”

Mr Nelson had been working as a lifeguard with Camp America, which organised his flight home. But during nine hours in the air, he could not sleep. “I couldn’t wait to get home, to see my parents, my sisters and my friends and be back somewhere I knew I would be safe.”

At Gatwick, Mr Nelson and Miss Wheeldon had tearful reunions with their families. Other survivors are expected back in Britain today.

FOUR DAYS INSIDE

Will Nelson’s journal

Sunday 28th
Entering the Superdome:


“I was in a bit of a state and rang home to tell them what was happening . . . the electricity was set to go off.”


Monday 29th
The storm hits:


“I began shaking as everyone around us was screaming and running up the stairs . . . I thought that the dome would flood and we would all die in it like a big fish bowl.”


Tuesday 30th:


“We heard stories of girls being raped and people getting stabbed . . . A few of us ventured up to the next level in desperate search of a toilet. It really was like walking through a neighbourhood, all the different camps. We kept our eyes to the ground.”


The Army advises ‘internationals’ to sit together:


“Their urgency scared us senseless.”


Wednesday 31st:
The ‘internationals’ are moved out of the dome:


“As we walked out the locals shouted insults at us and began causing trouble. I kept my eyes down.”

Brown pushed from last job: Horse group: FEMA chief had to be `asked to resign'

From BostonHerald.com
By Brett Arends
Saturday, September 3, 2005 - Updated: 02:01 PM EST

The federal official in charge of the bungled New Orleans rescue was fired from his last private-sector job overseeing horse shows.

And before joining the Federal Emergency Management Agency as a deputy director in 2001, GOP activist Mike Brown had no significant experience that would have qualified him for the position.

The Oklahoman got the job through an old college friend who at the time was heading up FEMA.

The agency, run by Brown since 2003, is now at the center of a growing fury over the handling of the New Orleans disaster.

``I look at FEMA and I shake my head,'' said a furious Gov. Mitt Romney yesterday, calling the response ``an embarrassment.''

President Bush, after touring the Big Easy, said he was ``not satisfied'' with the emergency response to Hurricane Katrina's devastation.

And U.S. Rep. Stephen Lynch predicted there would be hearings on Capitol Hill over the mishandled operation.

Brown - formerly an estates and family lawyer - this week has has made several shocking public admissions, including interviews where he suggested FEMA was unaware of the misery and desperation of refugees stranded at the New Orleans convention center.

Before joining the Bush administration in 2001, Brown spent 11 years as the commissioner of judges and stewards for the International Arabian Horse Association, a breeders' and horse-show organization based in Colorado.

``We do disciplinary actions, certification of (show trial) judges. We hold classes to train people to become judges and stewards. And we keep records,'' explained a spokeswoman for the IAHA commissioner's office. ``This was his full-time job . . . for 11 years,'' she added.

Brown was forced out of the position after a spate of lawsuits over alleged supervision failures.

``He was asked to resign,'' Bill Pennington, president of the IAHA at the time, confirmed last night.

Soon after, Brown was invited to join the administration by his old Oklahoma college roommate Joseph Allbaugh, the previous head of FEMA until he quit in 2003 to work for the president's re-election campaign.

The White House last night defended Brown's appointment. A spokesman noted Brown served as FEMA deputy director and general counsel before taking the top job, and that he has now overseen the response to ``more than 164 declared disasters and emergencies,'' including last year's record-setting hurricane season.

From CNN - another huge government fuck up!

Katrina medical help held up by red tape
Doctors waiting to treat victims in tax-funded, state-of-the-art unit

BATON ROUGE, Louisiana (AP) -- Volunteer physicians are pouring in to care for the sick, but red tape is keeping hundreds of others from caring for Hurricane Katrina survivors while health problems rise.

Among the doctors stymied from helping out are 100 surgeons and paramedics in a state-of-the-art mobile hospital, developed with millions of tax dollars for just such emergencies, marooned in rural Mississippi.

"The bell was rung, the e-mails were sent off. ...We all got off work and deployed," said one of the frustrated surgeons, Dr. Preston "Chip" Rich of the University of North Carolina at Chapel Hill.

"We have tried so hard to do the right thing. It took us 30 hours to get here," he said. That government officials can't straighten out the mess and get them assigned to a relief effort now that they're just a few miles away "is just mind-boggling," he said.

While the doctors wait, the first signs of disease began to emerge Saturday: A Mississippi shelter was closed after 20 residents got sick with dysentery, probably from drinking contaminated water.

Many other storm survivors were being treated in the Houston Astrodome and other shelters for an assortment of problems, including chronic health conditions left untreated because people had lost or used up their medicine.

The North Carolina mobile hospital stranded in Mississippi was developed through the Office of Homeland Security after the September 11, 2001, terrorist attacks. With capacity for 113 beds, it is designed to handle disasters and mass casualties.

Equipment includes ultrasound, digital radiology, satellite Internet, and a full pharmacy, enabling doctors to do most types of surgery in the field, including open-chest and abdominal operations.

It travels in a convoy that includes two 53-foot trailers, which as of Sunday afternoon was parked on a gravel lot 70 miles north of New Orleans because Louisiana officials for several days would not let them deploy to the flooded city, Rich said.

Yet plans to use the facility and its 100 health professionals were hatched days before Hurricane Katrina devastated the Gulf Coast, doctors in the caravan said.

As they talked with Mississippi officials about prospects of helping out there, other doctors complained that their offers of help also were turned away.

A primary care physician from Ohio called and e-mailed the U.S. Department of Health and Human Services after seeing a notice on the American Medical Association's Web site about volunteer doctors being needed.

An e-mail reply told him to watch CNN that night, where U.S. Health and Human Services Secretary Michael Leavitt was to announce a Web address for doctors to enter their names in a database.

"How crazy is that?" he complained in an e-mail to his daughter.

Dr. Jeffrey Guy, a trauma surgeon at Vanderbilt University who has been in contact with the mobile hospital doctors, told The Associated Press in a telephone interview, "There are entire hospitals that are contacting me, saying, 'We need to take on patients," ' but they can't get through the bureaucracy.

"The crime of this story is, you've got millions of dollars in assets and it's not deployed," he said. "We mount a better response in a Third World country."

Leavitt, U.S. Surgeon General Richard Carmona, and Dr. Julie Gerberding, director of the Centers for Disease Control and Prevention, were in Louisiana on Sunday. Gerberding planned to go to Texas, where many evacuees are now housed.

Many other doctors have been able to volunteer, and were arriving in large numbers Sunday in Baton Rouge. Several said they worked it out through Louisiana state officials.

Dr. Bethany Gardiner, a 36-year-old pediatrician who just moved to Santa Barbara, California, from Florida, had been visiting parents in Florida when the hurricane hit.

"I left my kids and just started searching places on the Web" to volunteer, eventually getting an invitation to come to Baton Rouge, she said.

Copyright 2005 The Associated Press. All rights reserved.This material may not be published, broadcast, rewritten, or redistributed.