Category Archives: Biotechnology

Biotechnology Science Fair Project Idea Gel Electrophoresis and Forensic Science

By: AdvanceVentureFun

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Biotechnology Science Fair Project Idea Gel Electrophoresis and Forensic Science - Video

Where does the community sit on Biotechnology?
In 2012 the Department of Industry, Innovation, Climate Change, Science Research and Tertiary Education undertook research into the public #39;s attitudes towards biotechnology. The findings are...

By: techNyouvids

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Where does the community sit on Biotechnology? - Video

Transhumanism, Nanotechnology, Biotechnology, IT, Cognitive Science
Video by Nordlaser. Music by Johnny Feyd - "This Is Now" Transhumanism is an international cultural and intellectual movement with an eventual goal at fundam...

By: OasicSoundVideo

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Transhumanism, Nanotechnology, Biotechnology, IT, Cognitive Science - Video

Home pregnancy tests have been practiced for long by women and is quite trusted way of confirming your doubts when it comes to conceiving. Here are certain signs that can tell you that you are probably pregnant.

If you have missed your period or you are having an abnormal or unusual period may be you are pregnant. If you have got frequent urinating tendencies or you throw up (vomit) again and again it is possible that you are pregnant. Generally women tend to lose their control over bladder when pregnant; it is very hard to control excretion of urine. Morning sickness or nausea is a tendency that is observed in pregnant women. They cannot resist throwing up again and again during the second and third months of pregnancy. Enlargement or soreness in breast is also indicates that possibly you are pregnant. Breast starts to grow big and become painful. If your breast is releasing colostrums, uterus is enlarged or you are getting a lot of stretch marks there is a possibility that you may be pregnant. In case you have frequent strange cravings like you have never had in past may be a n indication that you are pregnant.

However, these are not confirmed signs of pregnancy. Some of these symptoms when experienced together increase the probability of one’s pregnancy. You should immediately rush for a pregnancy test if you are even a little doubtful. This will clarify your doubts as it is a reliable way to test your pregnancy by yourself. You can also trace the pregnancy by an ultrasound test but home pregnancy strip test is more handy, cheap and reliable.

In case you are planning to conceive these are some symptoms that might be pointing towards your positive result on a pregnancy strip. Be happy you are experiencing such phenomenon and consult a doctor as soon as possible. Apart from all this reflect on your inner sight you can feel it when you are pregnant and the tests suggested above are just a primary confirmation.

In case you do not want to bear there are ways to get out of the web. Contraceptive pills are available in the market which can be a help in forbidding any pregnancy. There are pills that you can take within 72 hours after having unprotected sex to prevent pregnancy but its intake again and again can cause side effects. If you detect a positive on the pregnancy strip, you will have to abort it whether it is by an abortion pill or by any other method.

About The Author: Camila is a writer/blogger. She loves writing, traveling and reading books. She contributes on Josh Fink

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http://www.biotechblog.org/entry/good-home-pregnancy-tests/

2013StanfordE25B: A View of How Material Science And Engineering is Transforming Biotechnology
Project Authors: Dieter Rutzen and Sara Rodriguez We interviewed Prof. Nick Melosh from the Department of Material Science and Engineering in Stanford Univer...

By: shrodzmartz

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2013StanfordE25B: A View of How Material Science And Engineering is Transforming Biotechnology - Video

Background:
Saccharomyces cerevisiae strains expressing D-xylose isomerase (XI) produce some of the highest reported ethanol yields from D-xylose. Unfortunately, most bacterial XIs that have been expressed in S. cerevisiae are either not functional, require additional strain modification, or have low affinity for D-xylose. This study analyzed several XIs from rumen and intestinal microorganisms to identify enzymes with improved properties for engineering S. cerevisiae for D-xylose fermentation.
Results:
Four XIs originating from rumen and intestinal bacteria were isolated and expressed in a S. cerevisiae CEN.PK2-1C parental strain primed for D-xylose metabolism by over expression of its native D-xylulokinase. Three of the XIs were functional in S. cerevisiae, based on the strain's ability to grow in D-xylose medium. The most promising strain, expressing the XI mined from Prevotella ruminicola TC2-24, was further adapted for aerobic and fermentative growth by serial transfers of D-xylose cultures under aerobic, and followed by microaerobic conditions. The evolved strain had a specific growth rate of 0.23 h-1 on D-xylose medium, which is comparable to the best reported results for analogous S. cerevisiae strains including those expressing the Piromyces sp. E2 XI. When used to ferment D-xylose, the adapted strain produced 13.6 g/L ethanol in 91 h with a metabolic yield of 83% of theoretical. From analysis of the P. ruminicola XI, it was determined the enzyme possessed a Vmax of 0.81 mumole/min/mg protein and a Km of 34 mM.
Conclusion:
This study identifies a new xylose isomerase from the rumen bacterium Prevotella ruminicola TC2-24 that has one of the highest affinities and specific activities compared to other bacterial and fungal D-xylose isomerases expressed in yeast. When expressed in S. cerevisiae and used to ferment D-xylose, very high ethanol yield was obtained. This new XI should be a promising resource for constructing other D-xylose fermenting strains, including industrial yeast genetic backgrounds.Source:
http://www.biotechnologyforbiofuels.com/content/6/1/84