one of the animal kingdoms enduring mysteries the seaspanning return of salmon to their home stream may be explained by inbrain gps systems calibrated to earths magnetic field.
scientists hope to program the navigation systems of captive salmon to help the species survive in the wild. if they can figure out how to mimic the magnetic signature of a stream they can train ...... [Show More]
a group of collaborators from mit and harvard created nanoparticles that specifically bind to and deliver the drug cisplatin to prostate cancer cells.
from the national cancer institutes alliance for nanotechnology in cancer
to construct a stable nanoparticle that would only release its toxic cargo inside tumor cells the investigators synthesized a modified version of cisplatin tha...... [Show More]
kadnn elinin kiri Post Source: www.canpare.com Posted: Nov 29 2008 12:01:40
bilim adamlar kadnlarn ellerini inceledi ve hi beklemedikleri bir tabloyla karlat. aratrmalar kadnlarn ellerinde erkeklerinkinden daha ok bakteri tuerue yaadn ortaya koydu.
abddeki colorado ueniversitesinden biyokimya doenti rub knight ve ayn ueniversiteden ekoloji ve evrimsel biyoloji anabilim dalndan doent noah fiererrsqu...... [Show More]
este bichejo el elysia chlorotica aunque pueda parecerlo no es ni mucho menos el fruto de la pelacula alien vs. predator y si es asa no ha heredado la pasian por la violencia.
no sa si sera el primero pero para mi es el primer caso de un molusco que tenga la capacidad de realizar la fotosantesis algo totalmente inaudito y la forma en que lo consigue no lo es menos me explico
...... [Show More]
want some formica in your formula we thought wed seen the worst of the fdas screwups with this chinese melamine debacle but the agency still has surprises up its sleeve. it held back test results that reveal low levels of melamine in infant formula produced by u.s. companies mead johnson nestle and abbott laboratories. never fear the traces are so low that it does not pose a...... [Show More]
segan las medidas de campo la acidez de los ocaanos aumenta a un ritmo muy superior de lo predicho.
uno de los efectos mas perniciosos de las emisiones de diaxido de carbono de origen humano es la acidificacian de los ocaanos. el co2 se combina con el agua y produce acido carbanico. aunque la acidez no sea muy elevada puede dificultar o impedir la formacian de conc...... [Show More]
everybodys starting to pay a lot more attention to emissions spewing up into the atmosphere. but it still seems that not many are aware that those emissions end up in the ocean too modifying and even destroying ecosystems. the process is ocean acidification and its happening at a much more alarming rate than originally thought according to a new report published in the journal ...... [Show More]
una babosa marina vive de la fotosantesis gracias a los cloroplastos robados a las algas que comia en su infancia. ahora descubren que ademas tambian roba sus genes.
elysia chlorotica. foto pnas.
nosotros animales racionales que altimamente estamos cambiando el clima de la tierra y provocando una extincian masiva creemos que una de las pos...... [Show More]
los investigadores han identificado una nueva fuente de calulas productoras de insulina. los resultados de un nuevo estudio muestran que las calulas pancreaticas que producen insulina las calulas beta pueden formarse despuas del nacimiento o despuas de alguna lesian de otro tipo calular no relacionado. estas calulas llamadas calulas de los conductos pancreaticos se pueden di...... [Show More]
first things first i am a sucker for articles whose abstract reads something like this
patterns of deliberate human activity and behavior are of utmost importance in areas as diverse as disease spread resource allocation and emergency response. because of its widespread availability and use email correspondence provides an attractive proxy for studying human activity. recently it was re...... [Show More]
is the ocean already acidic enough to drive out mussels npr reported this morning on a new study that attributed falling mussel populations on tatoosh island wa a famous intertidal ecology site thats been monitored since the 1960s to decreasing ph.
ocean chemistry measured from tatoosh island found that the ocean there is becoming acidic 10 times faster than expected acco...... [Show More]
photo courtesy of istockphoto david marchal
contrary to previous findings researchers at at the joslin diabetes center have shown that insulinproducing pancreatic beta cells can form after birth or after injury from progenitor cells within the pancreas that were not beta cells.
according to susan bonnerweir ph.d. the studys lead researcher and a senior investigator in the section o...... [Show More]
ich erinnere mich an eine botanikvorlesung whrend meines studiums einer naturwissenschaft damals als noch vernuenftige studiengnge existierten und nicht so ein bolognabereinigter kram. da fragte die dozentin ob es denn fuer photosynthese nicht ausreiche da sie sich ihren gruenen badeanzug anziehe und in die sonne lege oder ob sie nur genuegend gruenzeug essen sollte um selbst photosyn...... [Show More]
di mezzi di trasporto pia o meno o per niente inquinanti ce ne sono tanti. treni automobili autobus biciclette motorini navi aerei. ma quali sono quelli che contribuiscono maggiormente ad accelerare il peggioramento del riscaldamento globale
e il quesito che si sono posti i ricercatori del centro internazionale per la ricerca sul clima e lambiente cicero ...... [Show More]
di patrizia lazzeri luneda 17 novembre 2008 alle 0843 durante le loro ricerche nelloman medio oriente il gelogo p.kelemen e il geochimico j.matter hanno scoperto una roccia che assorbe la co2 e potrebbe aiutare luomo a frenare il surriscaldamento del pianeta. quando la peridotite composta da silicio ossigeno calcio magnesio e ferro viene a contatto con lani...... [Show More]
links for 20081122 Post Source: koso.jugem.jp Posted: Nov 22 2008 20:40:29
robust dynamic classes revealed by measuring the response function of a social system pnas
tags tech wire
youtube britney spears circus album tv promo
tags music wire
rogan to do second target line the cut new york...... [Show More]
marco segnala un interessante articolo di pnas in cui vengono riportati i risultati di uno studio in cui lanalisi di isotopi stabili del carbonio e dell azoto ha rivelato limportanza del granoturco nei cibi fastfood....negli usa e nato un intero complesso industriale che sfrutta il piu possibile questa materia prima il granoturco sempre piu ...... [Show More]
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