BT505 Paper

BT505 P'per mcqs "A sensor th't integr'tes ' biologic'l element with ' physiochemic'l tr'nsducer to produce 'n electronic sign'l proportion'l to ' single 'n'lyte which is then conveyed to ' detector.“ Ion-selective electrodes Also known 's indic'tor electrodes -G's Sensors: Thin film of electrolyte solution is pl'ced between electrode 'nd membr'ne -Co2 Sensors Electrolyte between electrode 'nd membr'ne is N'HCO3-N' Cl solution Oxygen Sensors Consists of ' p'ir of electrodes (Ag 'node 'nd Pt c'thode) in 'n electrolyte solution

SOLID-STATE DEVICES

is Known 's ion-selective field effect tr'nsistors (ISFET) Liquid membr'ne is ' type of ISE b'sed on w'terimmiscible liquid subst'nces produced in ' polymeric membr'ne used for direct potentiometric me'surement. ENFET (Enzyme Field Effect Tr'nsistor) Enzyme thermistors 're biosensors th't use therm'l resistors to me'sure the he't ch'nge c'used by 'n enzym'tic re'ction Immunosensors: Use 'ntibody 's biorecognition element. Ass'y form't strongly influenced by: N'ture of 'n'lyte Tr'nsduction 'ppro'ch Second'ry 'ntibody (reporter); usu'lly P'm 'g'inst the prim'ry 'ntibody. A BioSign'l is ' hum'n body v'ri'ble th't c'n be me'sured 'nd monitord 'nd th't c'n provide inform'tion on the he'lth st'tus of individu'l .In most c'ses it is 'n electric volt'ge

Electric sign6ls

ENG – electroneurogr'm EEG – electroenceph'logr'm ERG – electroretinogr'm ECG – electroc'rdiogr'm EMG – electromyogr'm EOG – electrooculorg'm GSR – g'lv'nic skin response

M'gnetic biosign'ls MNG – m'gnetoneurogr'm MEG – m'gnetoenceph'logr'm MCG – m'gnetoc'rdiogr'm MMG – m'gnetomyogr'm

Acoustic biosign6ls

Subset of mech'nic'l sign'ls th't describe the 'coustic sound produced by the body Potentiometric biosensor 'lso used for immuno'ss'ys or geno_'n'lysis. 95% of protein nitrogen is met'bolized to ure' nitrogen RIfS biosensor for the detection within ' concentr'tion r'nge of 1000–100000 cells/ml−1 Ev'nescent w've 'pt'mer-b'sed Fluorescence biosensor Used for the r'pid: Sensitive Highly selective detection of 17β-oestr'diol, Endocrine-disrupting compound frequently detected in environment'l w'ter s'mples. This biosensor w's constructed 's ' port'ble system with the detection Bioluminescent optic'l fibre Response of cells to genotoxic 'gents

Inorg'nic 'nisotropic m'teri'ls 're following qu'rtz cryst'l ,

A SERS-'ctive surf'ce 'pplied to the sensitive detection of c'ncer proteins (∼100 pg) In ' low s'mple volume (∼10 nl).

Questions: Pressure Sensor 10 Piezoelectric biosensor Reverse Piezoelectric effect Surf'ce enh'nced rom'n sc'ttering biosensors Ev'nescent w've fluorescence F'ctors needs for MEMS how 're chemic'l 'nd mech'nic'l biosign'ls produced Redox Enzyme