Molecular level all-optical logic with chlorophyll absorption spectrum and polarization sensitivity

Raychaudhuri, Barun; Bhattacharyya, Soumen

doi:10.1007/s00340-008-3002-x

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…37,38 Some of the studied switchable systems can respond to two kinds of physical or physical/chemical signals, e.g., potential applied to an electrode and illumination, 39 or pH change and illumination, 40 or ion addition and applied potential. 41 The output signals generated by the chemical switchable systems are usually read by optical methods: absorbance 42 or fluorescence 43 spectroscopy, or by electrochemical means: currents or potentials generated at electrodes or in field-effect transistors. 44 Switchable chemical systems can be simple solutions of molecules 45 responding to external physical or chemical signals, or systems assembled at interfaces 17,46 (frequently at surfaces of conducting electrodes or Si-chips electronically communicating with the support).…”

Section: From Chemical To Biomolecular Computingmentioning

confidence: 99%

Enzyme-based logic systems for information processing

2010

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In this critical review we review enzymatic systems which involve biocatalytic reactions utilized for information processing (biocomputing). Extensive ongoing research in biocomputing, mimicking Boolean logic gates has been motivated by potential applications in biotechnology and medicine. Furthermore, novel sensor concepts have been contemplated with multiple inputs processed biochemically before the final output is coupled to transducing "smart-material" electrodes and other systems. These applications have warranted recent emphasis on networking of biocomputing gates. First few-gate networks have been experimentally realized, including coupling, for instance, to signal-responsive electrodes for signal readout. In order to achieve scalable, stable network design and functioning, considerations of noise propagation and control have been initiated as a new research direction. Optimization of single enzyme-based gates for avoiding analog noise amplification has been explored, as were certain network-optimization concepts. We review and exemplify these developments, as well as offer an outlook for possible future research foci. The latter include design and uses of non-Boolean network elements, e.g., filters, as well as other developments motivated by potential novel sensor and biotechnology applications (136 references).

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Section: From Chemical To Biomolecular Computingmentioning

confidence: 99%

Enzyme-based logic systems for information processing

2010

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“…Indeed, chemical processes can be cast [35,36] in the language of computing operations, with signals represented by changes [1][2][3][4][36][37][38][39][40][41][42][43][44][45][46][47][48] in structural, chemical, or physical properties, resulting due to physical, chemical, [77][78][79][80][81][82][83][84] or more than one type [53,[85][86][87] of input. The output signals can be detected spectroscopically [88][89][90][91][92][93] or electrically/electrochemically. [94][95][96] Chemical computing can be done in the bulk, e.g., in solution, [97][98] or at surfaces/interfaces, [14-17,99-102[ such as at electrodes or on Si-chips.…”

Section: Introductionmentioning

confidence: 99%

Control of Noise in Chemical and Biochemical Information Processing

Privman

2011

Israel Journal of Chemistry

103

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Abstract:We review models and approaches for error-control in order to prevent the buildup of noise when gates for digital chemical and biomolecular computing based on (bio)chemical reaction processes are utilized to realize stable, scalable networks for information processing.Solvable rate-equation models illustrate several recently developed methodologies for gatefunction optimization. We also survey future challenges and possible new research avenues.

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“…The maximum absorbance of chlorophyll in the hydrolysate after 30-min centrifugation at 10000 × g was observed at 675 and 430 nm (Figure 1). According to the study by Raychaudhuri and Bhattacharyy (2008), the total chlorophyll is grossly characterized with 2 distinct absorption bands at blue (402 to 441 nm) and red (640 to 680 nm). In this study, the chlorophyll absorbance at 675 nm increased from 0.46 to 0.86 (Figure 1), suggesting the lysis of cell walls occurred after 60-min hydrolysis by 150 U/mL of crude cellulases, which consequently allowed the chlorophyll released.…”

Section: Resultsmentioning

confidence: 99%

Hydrolysis of Chlorella by Cellulomonas sp. YJ5 Cellulases and Its Biofunctional Properties

Yin¹,

Jiang²,

Pon³

et al. 2010

Journal of Food Science

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Both 10% and 20% (w/w) Chlorella suspensions were hydrolyzed by 150 to 350 U/mL of cellulases from a 3-d cultivation of Cellulomonas sp. YJ5. Higher chlorophyll, reducing sugars and soluble proteins, and lower residual insoluble solid were observed on both samples after 30-min hydrolysis by various concentrations of cellulases at 50 °C. Decrease in insoluble solid, increases in soluble proteins, peptides and chlorophyll contents, and microscopic observation indicated obvious lysis of cell walls occurred during 60- to 180-min hydrolysis. Significant increases in soluble proteins, peptides, Fe(2+) chelating ability, trolox equivalent antioxidation capacity (TEAC), and reducing power was obtained after 3-h hydrolysis by 150 U/mL of cellulase. These data suggested that cellulolysis technology has high application potential in Chlorella industry.

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Molecular level all-optical logic with chlorophyll absorption spectrum and polarization sensitivity

Cited by 9 publications

References 32 publications

Enzyme-based logic systems for information processing

Enzyme-based logic systems for information processing

Control of Noise in Chemical and Biochemical Information Processing

Hydrolysis of Chlorella by Cellulomonas sp. YJ5 Cellulases and Its Biofunctional Properties

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