He became proficient with puppets and ventriloquism, which led to steady work as a television kiddie-show host at WJAR-TV in Providence, Rhode Islandfrom to
The Chase is On The human body houses a complex of twisted pathways, labyrinths of tunnels unimaginably small. The biological systems responsible for the flow of the blood, oxygen, and electrical impulses that sustain us are intricate and delicately coordinated.
And so, when these systems go wrong, when our bodies are vulnerable to cancers and diseases, it seems at first it would be ideal to have medicine that can perform on a scale as small and complex as the circuitry on which it acts.
Rather than exposing the whole body to toxic chemotherapy drugs, imagine cancer treatments that could deliver drugs directly to malignant cells.
Consider swallowing a device that could travel through your body, looking for signs of irritation and illness. However, the possibility of having tiny robots navigate the smallest passages of the human body is not far from being a reality. In fact, important steps have already been taken towards the creation and use of such nanotechnologies.
First Steps The first step towards using nanotechnology in medicine occurred inwhen Given Imaging introduced the PillCam. The PillCam is a capsule containing a light and camera that a patient swallows.
Images beamed wirelessly from the capsule can be analyzed and used for diagnostic purposes, thus replacing procedures like the traditional endoscopy, in which a flexible tube containing a flashlight and camera is inserted into the digestive tract. The PillCam, at about the size of a normal pill, is ideal for use in the passageways of the gastrointestinal system since it can be swallowed.
However, the digestive system is comprised of relatively large pathways compared to those of the arteries and capillaries, which can be as small as a few micrometers in diameter.
The PillCam is thus still too large to travel through the entire circulatory system. Additionally, the device lacks a means of navigating itself through the body; it merely travels passively along the natural course of the digestive system.
The PillCam is about the size of a large pill and can be swallowed. Thus, in order to explore passageways like those in the circulatory system, scientists needed to find a means of creating a smaller device that would be able to propel itself against the flow of the bloodstream.
The difficulty of this task was largely in the size of the technology needed. Any traditionally built battery-powered motor would be far too large to fit through passages only micrometers thick. Drug-Delivering Devices Scientists have managed to overcome this obstacle by using magnets instead of motors to propel the devices.
Similarly, a team in Dresden has created microtubes made of titanium, iron, and platinum. However, these microbots are also propelled by microbubbles. The tubes are partially filled with hydrogen peroxide, which, in a reaction catalyzed by the platinum, decomposes into oxygen and water.
Courtesy of Nanotechnology News Network. Bacterial Microcarriers Another solution to the problem of size can be found in nature.
The MC-1 strain of bacteria, discovered inis magnetic and propels itself with spinning tails. A team at Purdue University has performed similar experiments in mice, adhering genes to the surface of bacteria to alter gene expression in cells.
In test cases, mice were injected with bacteria carrying genes for luminescence. Though this bacteria-driven technique does navigate through more of the human body than its man-made counterpart, this method is not without faults.
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The bacteria has a half-life of about 30 or 40 minutes, so many of the bacteria died before reaching the tumor. Martel offers a hybrid solution to this problem.9 May, hrs – see updates at end of post Once again media reports have emerged claiming that genetically modified pest-resistant Bt brinjal (eggplant) has failed in the field and that farmers in Bangladesh are regretting that they have begun to grow it.
Feb 01, · Basic to the iPill’s successful journey is a sensor within it that detects the acidity, as measured by the pH value, in the gastrointestinal tract.
This varies from the high acidity of the stomach to the less acidic intestines to the more acidic colon.
The space environment is so inconvenient for human beings. There is so much that one has to bring along to keep them alive.
Life Support has to supply each crew member daily with kilograms of air, about kilograms of water, and about kilograms of (wet) food (less if you are recycling).Some kind of artificial gravity or a medical way to keep the bones and muscles from wasting away. The Digestive System Of Digestive Systems - This is one of the most amazing system, this system can be can break down food.
It extends from the mouth to the anus and closely associated with cardiovascular system. The fantastic voyage of the digestive system Essay Words | 8 Pages Once again we have been miniaturized in the submarine to continue the fantastic voyage of the digestive system. Synopsis: Newly widowed Army Captain Rossalind Donaldson returns home for her husband's funeral.
The Donaldson's are incensed at the Captain bacause right before their son was killed, he found out she was behaving like a slut at her posting.