Tuesday, July 26, 2011

Unit 8 Entry:



Growing or discovered, dynamism is lost, ecosystem balance is lost, biodiversity is lost. To keep up with the demands of a growing population, modern technologies are being created to increase food production. The introduction of industrial agriculture aims to feed around 6 billion people. Industrial agriculture is a form of modern farming which refers to industrialized raising and production of crops, livestock, poultry, fish, etc.  A “confined animal feeding operation” was set up for selected animal species like cows, hogs, turkeys, chicken the aim of which is to produce more meat, eggs, milk and poultry products at low cost with high level of food safetyin a controlled environment. To maintain the health of the animals and to ensure the good quality of the end products, vitamin supplements, growth hormones and use of therapeutic use of antimicrobials are being used. The advantages of industrial agriculture are increased production of food to meet the increasing needs of a growing population. Another advantage is that because it is mass population poses a great threat to the conservation of biodiversity. As we try to conserve and protect our existing ecosystem and the habitat of millions of species animals and plants, we are also faced continuously with the challenges and threats of a fast growing human population. The overwhelming increase in the population would mean an increasing need for food. Humans feed on animals and plants. As more animals and plants are being eliminated faster than being replaced production, products are relatively cheaper, which is convenient to the consumers. This would also create a better economy as this will benefit the growers, harvesters, manufacturers and the sellers as well. However, industrial agriculture also has its disadvantages. This create environmental and social issues, pollution is inevitable, damages to fisheries are more likely, increased health issues and risks from pesticide and chemical exposure are evident. The long term drawback is the increased ozone pollution, destruction of ozone layer which would eventually lead to global warming. In an effort to minimize the ill effects of industrial agriculture, a sustainable agriculture is now being practiced as this is more acceptable. The 3 main goals are environmental stewardship, farm profitability and prosperous farming communities. Sustainable agriculture uses organic form of farming methods which relies on natural occurring biological process, eliminating the use of pesticides and   chemicals which is definitely beneficial to environment, society and consumers. Agricultural industry will be able to keep up with the rapid growth of the global human population. However, we should be more cautious and be more vigilant with the ill effects it may cause.
Sources:

Unit 11 Entry:

Throughout the existence of mankind, we continued to discover and develop newer various technologies to help us with our lives. These inventions are created for different reasons which range from culinary purposes to health purposes to entertainment purposes. Many of these technological advances allowed us to gain a better understanding of our body, the human body. By knowing more about the body, we are able to have more effective countermeasures against various problems in the body by being able to diagnose and examine the damaged part of the body. Here are some of the technologies that we utilize for our medical needs:


The X-Ray:
An X-ray
The X-ray is probably the most notable technology that allows us to understand our internal body. Since you probably know what x-rays are, I'll give you a brief explanation of an X-ray machine. X-rays are a form of electromagnetic radiation. In medicine, an x-ray machine sends individual x-ray particles through the body. A computer or a type of special film is then used to record the images that are created. Denser structures are not penetrated by the x-rays and therefore show up in the x-ray images -- this is how we examine our bones. Aside from examining the body, x-rays can also be used for the management of cancer (this type of treatment is called radiation therapy), however a higher amount of radiation is needed as opposed to imaging.






Electrocardiography:
Next, is the Electrocardiogram. The electrocardiogram, A.K.A. ECG or EKG), is a noninvasive test used to reflect underlying heart conditions by measuring the electrical activity in the heart. By positioning leads (which are electrical sensing devices) on the body in standardized locations, information about many heart conditions can be learned by looking for characteristic patterns on the ECG.


A ECG (left) and a spirometry machine (right)


Spirometry:
The last of the technologies that I will be naming is spinometry. Now what is spirometry?  Spirometry is a diagnostic test that is easily done in your doctor's office or at a nearby clinic or hospital. In this test, one would be asked to take a big breath before blowing as hard as he/she can into a machine. This machine measures the amount of air that a person can blow out from his lungs as well as how fast it is blown out. Spirometry is the most reliable way to test your lungs for chronic obstructive pulmonary disease and asthma.


As you can see, the three technologies that I mentioned are very vital in identifying problems within the body as well as helping us prepare for a good solution for the problem. X-ray machines, electrocardiograms and spirometery machines are just some of the many machines that are used to help diagnose and cure us from many of our body's disorders and injuries. 




Sources:
Commented on:

















Thursday, June 9, 2011

Unit 13/14 Entry:


After taking a good look at the image above, try guessing what was in the image. What do you think it was? The material that was in the hand is called biosolids otherwise known as sewage sludge. If you're wondering, biosolids are mostly organic solids resulting from the treatment of wastewater that underwent further treatment to kill pathogens. Biosolids have been approved by the EPA for land application as a fertilizer and soil amendment. They also contain nutrients such as nitrogen and phosphorus as well as other micro nutrients that can aid with plant growth. I think that its really amazing that we're coming up with new and unconventional ways to fertilize our plants. However, are biosolilds safe? Does its disadvantages outweigh its advantages? After doing more background research, I found out that biosolids are generally safe to the environment. However, if not handled properly, they can become a hazard to our health. 

Advantages of biosoilds:
  • - Creates jobs
  • - It is a cost effective method of disposal
  • - Recycles versus filling landfills
  • - Promotes farming
  • - Reduces emissions from transportation to landfills
  • - Good free fertilizer 
  • - Land Reclamation
  • - It’s regulated according to the EPA law 503
  • - Improves crop production
  • - Reduces soil erosion and protects water quality
  • - Provides economic incentives
Disadvantages of biosolids:
  • - Potential health hazard 
  • - Effects irreversible
  • - Contamination resulting from accumulation of industrial waste
  • - Its true composition is unknown
  • - May contain hazardous chemicals
  • - Possibly transferable to crops 
  • - Decreases property value 
  • - Not sufficiently regulated
  • - Has a foul odor
  • - Presence of certain metals [especially in large quantities]
  • - Concerns about pathogens
  • - There is a potential of over-application of nutrients
As you can see, the advantages of the use of biosolids are generally around conservation of land and money while its disadvantages mostly dealt with environmental and health damage -- both of which can be avoided. From my point of view, these biosolids are most suitable for experienced farmers. While every farmer could dream of having free fertilizers, its disadvantages may even outweigh most, if not all, of its benefits. Inexperienced, or relatively new farmers may not be able to handle the material well, thus causing more harm than good. This is why I believe that biosolids are better used by the more experieced farmers who could handle the materials while causing no - or very little - damage. Although there are risks involved with this new type of fertilizer, it can still be used by everyone as an alternative due to its very cheap cost as well as its other benefits.

Sources:

Thursday, March 3, 2011

Unit 5 entry:

Pros and Cons of Designer Babies


Advanced and reproductive technologies allow parents and doctors to screen embryos for genetic disorders and select healthy embros. Thanks to our rapid advances in science and technology, the use of genetic technologies to ‘modify’ embryos b choosing desirable or cosmetic characteristics in the future is not surprising at all, however disturbing. These genetically modified offspring are what we call, ‘Designer Babies’.

Now how does this process work? Well, first, the parents choose the favourable traits for the baby to receive. Then through genetic engineering combined with in vitro fertilization, the presence or absence of particular genes or characteristics is ensured. Being able to get rid of potential genetic disorders is a great thing, right?



Many disorders around the world are caused by hereditary factors and by getting rid of these unwanted genes; we actually save countless lives around the world. However, like everything in the world, there is also a downside to this process. First of all, I (and I’m quite sure that a lot of people would agree) strongly believe that using Science to play god would be taking it too far. Secondly, the demand for “designer babies” might result in (sorf of) an “arms race”, where parents would compete to get a better child. And of course, not everybody can afford the price of altering your child’s genes...so what happens to those who give birth to normal, unaltered children then? Because of this massive differences in this new generation, discrimination would most likely be present between ‘unenhanced children’ and designer babies; where the designer babies view the unenhanced ones as inferior organisms.


In the long run, designer babies could also pose as a threat to humanity. The rise of identical, perfect children would result in a huge drop in the biodiversity of human beings. And although this sounds unpleasant, the Earth is currently overpopulated and we're using far too much of our resources. So preventing genetic-related deaths actually only worsen out situation.


Its true that the idea of modifying babies is amazing. However, I think that it has far too much cons. The idea of "designer babies" conflicts a lot with moral values as well as humanity's future.


---


Sources:




Friday, November 12, 2010

Unit2 Blog Entry



Most of you probably already know the dreadful effects oil spills have on our environment. Because of oil spills, many animals are dying. Crude oil can harm animals in many ways:
  • It can cause hypothermia in birds (drowning them by breaking down the feather’s insulating capabilities which makes them heavier) and seals (destroys their insulating fur),
  •  Ingestion can either poison the animal or create toxins that can cause poisoning further up the food chain (Shellfish and corals are at risk because they do not have the capability to escape from the oil),
  • Damage to the animal’s airways and immune systems,
  • Damage to thinner turtle shells,
  • Damage to sea grass beds as well as other feeding areas and;
  • Algae, which has a vital role in waterway ecosystems.
Many animals are affected by oil spills






The problem is that getting rid of the spilled oil is a very difficult task. Oil can spread easily and is hard to remove from organic sands that are found in coastal wastelands and marshes. Oil is also capable of reducing the growth of marsh grasses, which are a key source of food and cover. 
Cleaning the polluted water should be done carefully because aggressive ways of cleaning it may harm certain ecosystems – thus worsening the situation. On top of that, cleaning the water also requires a lot of money so in the process, economic damages are also guaranteed. Alternative methods can such as the use of microbes or a voraxial separator (device that's capable of separating liquids through centrifugal forces) can be used.  
 
Voraxial Separator



One of the most prominent organizations in the world that reponses to oil spills is The Oiled Wildlife Care Network (OWCN). The OWCN is actually a statewide collective of trained wildlife providers,regulatory agencies, academic institutions and wildlife organizations that work together to rescue and rehabilitate the oiled wildlife in California. The OWCN also demonstrates the extene of the possibilities created when various institutions and organizations work together to achieve a common goal.

The OWCN was created by the California Department of Fish and Game as a response unit for oiled wildlife and is administered by the University of California-Davis. Since its creation, it had built or helped outfit a dozen facilities that are capable of rehabilitating animals in a short time and has cared for thousands of animals in more than 75 oil spills. When there is an oil spill in California, the Department of Fish and Game activates the OWCN which then moves rapidly to rescue all victims of the spill. The live animals that are rescued are taken to special facilities where they are treated for a few days until they are ready for cleaning (as you can see in the image below). These cleaned animals are then cared for by the OWCN until they return to normal.


Thanks to organizations such as the OWCN, we are able to save many different species from becoming extinct and preserve their biodiversity.



Sources:
Comments: