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Copy of Bio-interfacing

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yıldız pehlivan

on 30 May 2014

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Transcript of Copy of Bio-interfacing

Societal Impacts to the Future
As emerging technologies interact with society, certain individuals would be benefited more than others. The following are the impacts that the applications of bio-interfacing has on the society.
Basic characteristics of a biosensor
Biosensors are classified either by their
biological element
or the
transducers
used
Application of Biosensor

Bio
sensors

Advantage
High through-put technique,sensitive accurate and easy to use
Highly specific,fast and cost effective
Multiple residues analyzed in one shot ( as many as chips in an array)
Allow rapid continuous control on -line monitoring
Less labor intensive
Full automation: higher productivity

Disadvantage
Expensive equipments hard to construct
Analysis restricted to available chips
Intoxication of the sensor cells by other molecules that diffuse or deposit on the membrane
Yıldız Pehlivan
01040903

Overview:
Introduction
What is Biosensor ?
History of Biosensor
Classification of Biosensor
Types of transducers
Application
Advantage and Disadvantages
What is biosensor?
A biosensor is a device for the detection of an analyte that combines a biological component with a physicochemical detector component.

Various biosensor research and the use of nanotechnology
Linearty
Sensitivity
Selectivity
Specificity
Response time
This video reinforces the research and applications of biosensors as well as the role nanotechnology plays
Reference List



Melab. (2009). Schematic configuration of a Biosensor [Photograph]. Retrieved on January 15, 2014 from melba.snu.ac.kr/

N.a. (2006). Lecture 17: Biosensors. Retrieved on January 25, 2014 from ocw.mit.edu/

Nanobioengineering and Bioelectrics Lab. (2010, April 8). Biosensor, Nanobiosensor, Bioelectronics, FIU. [Video]. Retrieved on January 26, 2014 from www.youtube.com/

News Medical. (n.d.). Biosensors – What are Biosensors?.News Medical.Retrieved on January 10, 2014 from www.news-medical.net/

Worldcarfans. (2009). Honda Develops Brain-Machine Interface Technology [Video]. Japan: Youtube. Retrieved on January 21, 2014 from www.youtube.com/

Father of the Bio sensor

1916 First report on immobilization of proteins

1922 First glass pH electrode

1956 Clark published his definitive paper on the oxygen electrode.

1962 First description of a biosensor: an amperometric enzyme electrodre for glucose (Clark)

1975 First microbe based biosensor, First immunosensor

1982 First fibre optic-based biosensor for glucose

1998 Blood glucose biosensor launch by LifeScan FastTake


Optical
Optical fibers
Surface Plasmon resonance
Absorbance luminescence
Professor Leland C Clark Jnr 1918–2005

History of Biosensor
Enzyme
Proteins
Antibody
DNA
Organelles
Microbial cells
Plant
Animal tissue

The four main types of transducers used in biosensors are:
Electrochemical
Optical
Piezoelectric
Thermal
Electrochemical
Potentiometric
Amperometric
Piezoelectric
Surface acoustic wave sensors
Thermal
Calorimetric sensor
Medicine
Pregnancy test
Detects the hCG protein in urine
.
Environment


The level of volatile organic compounds in air
Industrial process
monitoring the production of alcohol during the fermentation

Pharmaceutical industry
Quartz Crystal Microbalance
Glucometer
Glucose monitoring device (for diabetes patients)

Monitors the glucose level in the blood.

Military applications

to detect 24 pathogens(anthrax,plague,smallpox...)
ln mining
to detect the presence of poisonous or explosive gases in mines
Market size of Biosensor
This image shows the components of a biosensor and the way it works
Ion-selective electrodes
Ion-selective field effect transistor
Solid electrolyte gas sensor
Electronic noses
$7.3 billion in 2003
$10.2 billion in 2007
This becoming one of the fastest growing sectors in the world
Thank you
Future application
to detect specific genes or parts of genes

Potentiometric
is a type of chemical sensor that mesured as the potential difference between the working electrode and the reference electrode
Amperometric
measures current generated by electrochemical oxidation oreduction of electroactive species at a constant applied potential
Ion selective electrodes (ISE)
converts the activity of a specific ion dissolved in a solution into an electrical potential which can be mesured by a voltmeter or pH meter
Ion selective field effect transistor (ISFET)
used for measuring ion concentrations in solution; when the ion concentration (such as H+, see pH scale) changes, the current through the transistor will change accordingly.
These involve determining
changes in light absorption between the reactants and products of a reaction,or measuring the light output by a luminescent process
SPR
is an optical detection rocess that occurs when a polarized light hits a prism covered by a thin metal layer
Luminescence is emission of light by a substance not resulting from heat
is a device that uses the piezoelectric effect,to measure changes in pressure acceleration , strain or force by converting them to an electrical charge
are class of microelectromechanical system which rely on the modulation of surface acoustic waves to sense a physical phenomenon
can detect changes in frequency of the crystal due to changes in mass on the surface of the crystal
Detect changes in temperature
The temperature changes are usually determined by means of thermistors at the entrance and exit of small packed bed columns containing immobilised enzymes within a constant temperature environment

Maximum linear value of the sensor calibration curve. Linearity of the sensor must be high for the detection of high substrate concentration.

The value of the electrode response per
substrate concentration.

Interference of chemicals must be
minimized for obtaining the correct result


The necessary time for having 95%
of the response.
Drinking water security
Detection of food pathogens quick and easy
Wine industry
to detect drugs or explosives in airport
Smart skin
SAW
Specificity
A biosensor should be specific to e analyte which it interact
Linearty
Sensitivity
Selectivity
Response time
Full transcript