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	<title>graystone.se &#187; Vetenskap</title>
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	<link>http://graystone.se</link>
	<description>Livet, universum och Gråstensvägen</description>
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		<title>Pk eller inte?</title>
		<link>http://graystone.se/2009/01/pk-eller-inte/</link>
		<comments>http://graystone.se/2009/01/pk-eller-inte/#comments</comments>
		<pubDate>Mon, 12 Jan 2009 20:11:20 +0000</pubDate>
		<dc:creator>LenaMT</dc:creator>
				<category><![CDATA[Allmänt]]></category>
		<category><![CDATA[Vetenskap]]></category>

		<guid isPermaLink="false">http://graystone.se/?p=344</guid>
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			<content:encoded><![CDATA[<p>Jahaja, ska det handla om politiskt korrekt det här eller. Icke då.<img style="margin: 10px; float: right;" title="Röda blodkroppar" src="http://www.geblod.nu/items/R%C3%B6d_blodkropp170.jpg" alt="R%C3%B6d blodkropp170 Pk eller inte?" width="170" height="147" /></p>
<p>Var tvungen att läsa både en och tre sidor innan jag började få ett litet, litet grepp om det här med P<em>k. </em>Jag har inte hängt med tillräckligt bra på det lite mer blödiga området för att inse att mina inlärda vanliga blodgruppssystem inte förslår någonstans alls längre. AB0-systemet och rhesus är väl bekant för de flesta, men P-blodgruppssystemet var i alla för mig något helt nytt.</p>
<p>Varför då detta intresse? Ett <a href="http://www.newsdesk.se/view/pressrelease/blodgrupp-kan-avgoera-risken-foer-hiv-infektion-264674" target="_blank" class="broken_link">svenskt-kanadensiskt forskarlag</a> har funnit att de med <a href="http://www.aftonbladet.se/senastenytt/ttnyheter/inrikes/article4166042.ab" target="_blank" class="broken_link">mycket hög P<em>k</em></a> kan vara praktiskt taget <a href="http://www.svd.se/nyheter/inrikes/artikel_2307763.svd" target="_blank">resistenta mot hiv</a>.</p>
<p>Om jag förstått saker rätt, så består <a href="http://faculty.matcmadison.edu/mljensen/BloodBank/lectures/i_and_p_blood_group_systems.htm" target="_blank">P-blodgruppssystemet</a> av fem variationer beroende på om man har P, P1 eller P<em>k</em> antigen och då vilken typ av det ena eller andra. Sen hänger jag inte med så mycket längre, men det <a href="http://intressant.se/intressant" target="_blank">intressant</a>a är ju om detta kan vara en väg att gå för att hitta ett skydd mot hiv och dess virusvarianter.</p>
<p>/lmt</p>
<p>- tänk själv</p>




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		<title>Odödlig?</title>
		<link>http://graystone.se/2008/11/ododlig/</link>
		<comments>http://graystone.se/2008/11/ododlig/#comments</comments>
		<pubDate>Wed, 12 Nov 2008 10:02:42 +0000</pubDate>
		<dc:creator>Jesper</dc:creator>
				<category><![CDATA[Allmänt]]></category>
		<category><![CDATA[Vetenskap]]></category>

		<guid isPermaLink="false">http://graystone.se/2008/11/ododlig/</guid>
		<description><![CDATA[Vet inte om det är något man vill vara. Men tanken är svindlande. Aubrey de Grey höll ett Ted Talk för ett tag sen som jag tittade på och funderade mycket över. När jag kikade igenom lite av mina mest frekventerade rss-feeds i morse så märkte jag att det (och Aubrey) är på tapeten igen. [...]]]></description>
			<content:encoded><![CDATA[<p>Vet inte om det är något man vill vara. Men tanken är svindlande.</p>
<p><a href="http://www.ted.com/index.php/speakers/aubrey_de_grey.html">Aubrey de Grey</a> höll ett <a href="http://www.ted.com/index.php/talks/aubrey_de_grey_says_we_can_avoid_aging.html">Ted Talk</a> för ett tag sen som jag tittade på och funderade mycket över. När jag kikade igenom lite av mina mest frekventerade rss-feeds i morse så märkte jag att det (och Aubrey) är på <a href="http://www.dailygalaxy.com/my_weblog/2008/11/can-humans-live.html" class="broken_link">tapeten igen</a>.</p>
<p>Kan det vara så? Att flera av de som är yngre än 40 idag (undrar varför den begränsningen förresten, får grävas mer i) kommer kunna leva i flera århundraden? Vad blir effekterna? Hur kommer befolkningsökningen se ut? Maktbalansen mellan generationer?</p>
<p>Som sagt, svindlande tanke.</p>
<p>/j</p>
<ul>
<li><a href="http://www.worldhealth.net/news/the_immortal_question_are_we_on_the_brin" target="_blank">http://www.worldhealth.net/news/the_immortal_question_are_we_on_the_brin</a></li>
<li><a href="http://www.healthbolt.net/2007/07/26/forever-young/" target="_blank">http://www.healthbolt.net/2007/07/26/forever-young/</a></li>
<li><a href="http://news.bbc.co.uk/1/hi/uk/4003063.stm" target="_blank">http://news.bbc.co.uk/1/hi/uk/4003063.stm</a></li>
</ul>




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		<title>Virtualisering &#8211; och &#8220;vårt&#8221; svarta hål.</title>
		<link>http://graystone.se/2008/09/virtualisering-och-vart-svarta-hal/</link>
		<comments>http://graystone.se/2008/09/virtualisering-och-vart-svarta-hal/#comments</comments>
		<pubDate>Fri, 05 Sep 2008 11:41:27 +0000</pubDate>
		<dc:creator>Jesper</dc:creator>
				<category><![CDATA[Vetenskap]]></category>
		<category><![CDATA[Astronomi]]></category>

		<guid isPermaLink="false">http://graystone.se/2008/09/virtualisering-och-vart-svarta-hal/</guid>
		<description><![CDATA[Virtualiseringen har gjort rejält intåg även hos astronomer. Nu har man länkat ihop paraboler från Hawaii, Arizona och Kalifornien till ett enda virtuellt teleskop som därmed kan se 1000 gånger tydligare än Hubble-teleskopet. Teleskopets första uppgift var att observera &#8220;Sagittarius A&#8221; &#8211; det man tror är det svarta hålet i mitten av Vintergatan, vars massa [...]]]></description>
			<content:encoded><![CDATA[<p><img style="float: right;" src="http://www.sciencedaily.com/images/2008/09/080903134313.jpg" alt="080903134313 Virtualisering   och vårt svarta hål." width="170" height="170" title="Virtualisering   och vårt svarta hål." />Virtualiseringen har gjort rejält intåg även hos astronomer. Nu har man länkat ihop paraboler från Hawaii, Arizona och Kalifornien till ett enda virtuellt teleskop som därmed kan se 1000 gånger tydligare än Hubble-teleskopet.</p>
<p>Teleskopets första uppgift var att observera &#8220;Sagittarius A&#8221; &#8211; det man tror är det svarta hålet i mitten av Vintergatan, vars massa är fyra miljoner gånger solens.</p>
<p>Man kunde nu observera något man tror är det svarta hålets &#8220;event horizon&#8221;, dvs, den region kring det svarta hålet från vilket ingenting &#8211; inte ens ljuset &#8211; kan ta sig ut.</p>
<p>/j</p>
<p>Länkar: ScienceDaily</p>
<ul>
<li><a href="http://www.sciencedaily.com/releases/2008/09/080903134313.htm" target="_blank">New Virtual Telescope Zooms In On Milky Way&#8217;s Super-massive Black Hole</a></li>
<li><a href="http://www.sciencedaily.com/releases/2008/09/080903172415.htm" target="_blank">Closest Look Ever At Edge Of A Black Hole</a></li>
</ul>




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