Thursday, December 13, 2007

Invention: Green power special

link:http://technologynewscientist.com-invention:greenpowerspecial

summary:a man named Levinson and he belives that kidney cells transporting ions, and could be well suited to making a miniature battery.He suggests that such biobatteries might be ideal for powering devices inserted in the body, such as insulin pumps or pacemakers.and so he went for it

Questions: What reactions does this enzyme catalyze?it transports ions to the kidney
How is the cell affected if this enzyme is removed? i think it effects it in a bad way because the ions are needed for transporting information
List three things you learned from this article in your own words.ions are transported to the kidneys,the cell culture can draw oxygen, and producing biobatteries with the kind of voltages needed to run medical devices.
What impact would the absence of this molecule have on the cell? bad we need them to help transport

Last Word: Sacred DNA

link: http://www.newscientist.com-lastword:scared dna

summary: this passage discusses maily dna and where its found how its found and ect. it also talkes about Biologists routinely construct yeast and bacterial lines.

question:What are the major functions of nucleic acids in the cell?n/a
What are the differences in RNA and DNA? dna is found every where including in a cell culture while rna isnt founn in cell culture.
List three things you learned from this article in your own words. i learned dna can be found in cell culture,it generally requires animal serum to keep the cells alive,and white blood cells contain dna
What impact would the absence of this organelle have on the cell?horrible impact the cell i think couldnt survive

Ecology and diversity

link: http://www.newscientist.com-ecologyanddiversity/

Summary: This passage is basicly comparing the world of ecology to diversity.It also tells us about the number decrease of biodiversity.and how we go a little beyond this to recognise ecosystem and species.

Questions: What kind of relationship is being described in the article? a similaritie between the two ecology and diversity
Describe the niche being discussed in the article. the article talks about Convention on Biological Diversity
List three things you learned from this article in your own words. The conservation of diversity and its sustainable and equitable use is the basis of the 1992 Convention on Biological Diversity, that Diversity at all levels of biological, taxonomic and ecological organisation is the fundamental basis for human health and sustainability.
What impact would the topic of the article have on the biosphere? n/a

Wednesday, December 12, 2007

Preventing Tuberculosis Reactivation

link:http://www.sciencedaily.com/releases/2007/10/071018090450.htm

Tuberculosis (TB) is the leading cause of death due to infectious disease in the world today. It is estimated that 2 billion people are currently infected, and although most people have latent infection, reactivation can occur.

Human Disease
What are the symptoms of this disease?Nausea, weakness, fatigue, rapid weight loss, fever, night sweats, cough, and chest pain
How is this disease passed from person to person?coughing and sneezing
List three things you learned from this article in your own words.The signs and symptoms, how it is passed, and it is deadly.
What impact does this disease have on the US economy? It has killed a lot of people.

Progress Toward Artificial Photosynthesis?

Link: http://www.sciencedaily.com/releases/2007/03/070312152123.htm

Summary: This article is about the progress toward artificial photosynthesis using a special new type of metal-free catalyst: graphitic carbon nitride. The reason it's hard is become it takes a lot of energy to break down the Carbon bonds in CO2.




What is the chemical equation for photosynthesis? Carbon Dioxide + Water = Glucose + Oxygen

What organelles are involved in this process? chloroplasts

List three things you learned from this article in your own words. CO2 bonds are difficult to break, artificial photosynthesis is possible, their are few metals that can break co2 bonds

What impact would the absence of this process have on the biosphere? Without photosynthesis and in turn plants their would be no oxygen which would kill humans leaving the earth without carbon dioxide.

New Findings On Sour Taste

link:http://www.sciencedaily.com/releases/2007/07/070709103854.htm

Summary:Food manufacturers may soon have more control over the amount of sour taste that comes through in a variety of acidified food products.Sour is one of only five primary human taste sensations, and is stimulated by organic acids. Some organic acids are naturally present in foods, such as the citric acid in oranges, malic acid in apples and, as a result of fermentation, the lactic acid in yogurt. These and other organic acids may also be used as food ingredients.

Organic Molecules
What is the major role of this molecule in the cell?taste
List three things you learned from this article in your own words.They are used in oranges, in yogurt, and in apples.
What impact would the absence of this molecule have on the cell? Some of the foods that we eat might have a different taste.

Flip-flopping Gene Expression Can Be Advantageous

link:http://www.sciencedaily.com/releases/2007/11/071126103616.htm

Summary:One gene for pea pod color generates green pods while a variant of that gene gives rise to the yellow-pod phenotype, a feature that helped Gregor Mendel, the 19th century Austrian priest and scientist, first describe genetic inheritance. However, many modern-day geneticists are focused on the strange ability of some genes to be expressed spontaneously in either of two possible ways.

Mendel and Genetics
Explain the phenomenon being described in the article.pea pods being green or yellow
What is the difference between a genotype and a phenotype?genotype are the letters and phenotype are the physical apperance.
List three things you learned from this article in your own words.Mendel used pea pods for his experiment, he was a priest, and he described genetic inheritence.
What impact would the not understanding genetics have on medicine or agriculture?We would not have some of the medicines and crops that we have now.

Scientists Unravel Ancient Evolutionary History Of Photosynthesis

link:http://www.sciencedaily.com/releases/2000/09/000913211733.htm

Summary:In photosynthesis, green plants use the energy of sunlight to convert carbon dioxide into hydrocarbons that promote plant growth while generating oxygen from water and releasing the oxygen to the atmosphere. All animals including humans depend either directly or indirectly on this source of food and oxygen. Consequently, photosynthesis is considered the most important chemical process on Earth.

Photosynthesis
What is the chemical equation for photosynthesis?CO2 + 2H2O >> CH2O + O2 + H2O.
What organelles are involved in this process?chloroplasts
List three things you learned from this article in your own words.This helps the plant grow, all animals depend on this , and it is the most important chemical process on earth.
What impact would the absence of this process have on the biosphere?there wouldn't be any oxygen on earth.

Chloroplast

link:http://www.sciencedaily.com/articles/c/chloroplast.htm

Summary:Chloroplasts are organelles found in plant cells and eukaryotic algae that conduct photosynthesis.Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant.

Cell Organelles
What is the major function of this cell's organelle?conduct photosynthesis
Which cell types have this organelle?plant and eukaryotic algae
List three things you learned from this article in your own words.They absorb sunlight, condust photosynthesis, and help produce food for the plant.
What impact would the absence of this organelle have on the cell? The plant probably wouldn't live.

Global Warming Likely To Increase Stormy Weather, Especially In Certain US locations

Link:http://www.sciencedaily.com/releases/2007/12/071204121949.htm

Summary: There have been dramatic increases in potential storms conditions. The increase in storm conditions occur during the typical storm seasons


Questions:
What are some ways this phenomenon could be stopped?Car Pooling
Is there anything you could do to contribute to the reversal ?Recycle
List three things you learned from this article in your own words.
What impact would the continuance of these process have on the biosphere?A bigger ozone layer adn a destroyed world.