Optical beam deflection induced by enthalpy of a chemical reaction and its analytical application

Wu, Xing Zheng; Shindoh, Hiroaki; Hobo, Toshiyuki

doi:10.1021/ac00054a031

Cited by 16 publications

(8 citation statements)

References 6 publications

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“…Boccara et al 9 mostraram que a PDS permite medir variações de temperatura de superfície da ordem de 10 -7 °C, quando a amostra está mergulhada em um líquido. A PDS está sendo empregada em diferentes tipos de estudos, como caracterização mecânica de metais 18 , medidas de calorimetria 19 , localização de defeitos estruturais em amostras sólidas 20,21 , detecção de mudança de fase em metais 22 , medidas de entalpia de reações químicas [23][24][25] , monitoramento da difusão de um gás entre duas fases líquidas 26 e medidas de difusividade térmica de materiais [27][28][29][30][31][32][33][34][35] .…”

Section: O Efeito Miragem De Temperaturaunclassified

Princípio e utilização da técnica de efeito miragem de concentração

Trigueiro¹,

Matencio²,

Moraga³

et al. 2006

Quím. Nova

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The aim of this work is to present the theoretical and experimental aspects of the mirage effect technique. We are especially interested in the concentration mirage effect, which is a powerful tool in the study of electrochemical reactions that produce ionic movements close to electrodes and to get some fundamental information on mass transport and charge transfer during electrochemical processes. Limitations of this technique are discussed as well as the recent attempts to overcome them.

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Section: O Efeito Miragem De Temperaturaunclassified

Princípio e utilização da técnica de efeito miragem de concentração

Trigueiro¹,

Matencio²,

Moraga³

et al. 2006

Quím. Nova

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“…The OBD method also can be used for exploring a concentration gradient in flow systems [20][21][22]. Recently, we have explored chemical reaction heat-induced OBD and concentration gradient-induced OBD in chemical reactions in aqueous solution [23][24][25][26][27][28][29][30]. In principle, any chemical reaction occurring at a single particle in aqueous solution will generate concentration changes or gradients of chemical species, and a reaction heat-induced temperature gradient around the particle.…”

Section: Introductionmentioning

confidence: 99%

Optical beam deflection approach for studying ion-exchange reactions occurring at a single ion-exchange resin particle

Tsuji

Teramae

2007

Reactive and Functional Polymers

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“…Either a concentration or temperature gradient will induce a refractive index gradient, which in turn causes deflection of a probe beam (8)(9)(10)(11)(12)(13)(14)(15). Recently, we have applied the optical beam deflection (OBD) method for exploring reaction-heat-induced temperature gradients (16)(17)(18)(19)(20)(21)(22)(23) and reaction-induced concentration gradients (24,25). For a living cell, cell activities should be accompanied by various reactions (chemical and biochemical) and materials movement across the cell membrane, i.e., certain materials move into the cell (e.g., nutrients and oxygen) and out of the cell (e.g., metabolic products and CO 2 ).…”

Section: Introductionmentioning

confidence: 99%

Noninvasive Diagnosis of a Single Cell with a Probe Beam

Terada

2005

Biotechnology Progress

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It is important to distinguish a living/dead cell in cell culture, especially in the regenerate medicine field including cell therapy, since those cells are usually in short supply and consequently the ex vivo culture process should be operated strictly. Conventional methods for distinguishing a living from a dead cell usually require labeling with a dye, which spoils the culture of the cell. Here we show a simple noninvasive method for diagnosing a dead or alive cell with a probe beam. If a cell is alive, the active transport of materials across the cell membrane causes a change of concentration gradients, and this change further induces a change of deflection of a probe beam passing through a vicinity of the cell membrane. If a cell is dead, no or little change in deflection of the probe beam is induced because no or little active materials movement across the cell membrane exists. The deflection of the probe beam is monitored, and judgment on whether a cell is dead or alive from the deflection signal agreed with the conventional decision.

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Optical beam deflection induced by enthalpy of a chemical reaction and its analytical application

Cited by 16 publications

References 6 publications

Princípio e utilização da técnica de efeito miragem de concentração

Princípio e utilização da técnica de efeito miragem de concentração

Optical beam deflection approach for studying ion-exchange reactions occurring at a single ion-exchange resin particle

Noninvasive Diagnosis of a Single Cell with a Probe Beam

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