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Anderson R.L. Caires

Bio: Anderson R.L. Caires is an academic researcher from Federal University of Mato Grosso do Sul. The author has contributed to research in topics: Biodiesel & Fluorescence spectroscopy. The author has an hindex of 18, co-authored 89 publications receiving 1152 citations. Previous affiliations of Anderson R.L. Caires include University of São Paulo & Universidade Federal da Grande Dourados.


Papers
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Journal ArticleDOI
TL;DR: It is believed that the two-species trap could be used as a reliable source of ultracold molecules to be captured by electrostatic, magnetic, or optical traps and motivate further investigation of quantum collective effects as well as high-resolution spectroscopy of the rovibrational level structure of cold heteronuclear molecular systems.
Abstract: We report the observation of translationally ultracold heteronuclear ground-state molecules in a two-species magneto-optical trap containing $^{\mathrm{39}}\mathrm{K}$ and $^{85}\mathrm{Rb}$ atoms. The KRb molecules are produced via photoassociation and detected by multiphoton ionization. We had characterized their temperature and measured their formation rate constant. We believe that the two-species trap could be used as a reliable source of ultracold molecules to be captured by electrostatic, magnetic, or optical traps. This possibility will certainly motivate further investigation of quantum collective effects as well as high-resolution spectroscopy of the rovibrational level structure of cold heteronuclear molecular systems.

147 citations

Journal ArticleDOI
TL;DR: In this article, a modified sol-gel method was used in the preparation of (in wt.%) (100 − x) polyvinyl alcohol (PVA)/x ZnO nanocomposite films, with x = 0, 1, 2, 3, 4, and 5.

115 citations

Journal ArticleDOI
TL;DR: Results showed that the AgNPs penetrated the roots, affecting MI, GI, NAI, and MNI in meristematic cells, and were the main responsible for the cytotoxicity and genotoxicity since negligible silver dissolution was observed.

81 citations

Journal ArticleDOI
TL;DR: In this paper, the first in vivo observation of chlorophyll a fluorescence quenching induced by gold nanoparticles was reported, using a portable optical fiber-based spectrofluorimeter.
Abstract: To our knowledge, the present work reports the first in vivo observation of chlorophyll a fluorescence quenching induced by gold nanoparticles. Laser-induced fluorescence spectroscopy was used to collect in vivo chlorophyll a fluorescence, using a portable optical fiber-based spectrofluorimeter. Fluorescence quenching was observed for all plants submitted to the gold nanoparticle treatment, and both excitation wavelengths, 405 nm and 532 nm, were capable of detecting interactions between gold nanoparticles and plants. Our results also suggest that gold nanoparticles were able to translocate and accumulate in the soybean plants after seed inoculation.

77 citations

Journal ArticleDOI
TL;DR: In this paper, the interaction between chlorophyll (Chl) and Ag NPs, over a wide range of nanoparticle concentrations (from 0.μM to 200.0μM), was evaluated by monitoring the ChlF.
Abstract: Silver nanoparticles (Ag NPs) are among the most widely produced and used nanomaterial due to their antimicrobial and antibacterial properties, allowing a wide range of commercial applications. Thereby, the increasing use of Ag NPs should inevitably lead to the release and accumulation of these NPs into the environment, resulting in adverse effects on plants, animals and humans. Chlorophyll fluorescence (ChlF) has been proposed as a non-destructive and accurate tool for detecting the impacts of environmental stress on plants. Little is known about the photophysical behavior of plants when exposed to a metallic NPs-containing environment. The present study evaluated the interaction between chlorophyll (Chl) and Ag NPs, over a wide range of nanoparticle concentrations (from 0 μM to 200.0 μM), by monitoring the ChlF. The results reveal that the ChlF is quenched in the presence of Ag NPs, as a result of the static and dynamic quenching processes. The present results suggest that ChlF has a great potential to be used in the future as an analytical tool for monitoring the interaction of plants and NPs as well as investigating the effects of NPs on plants.

66 citations


Cited by
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[...]

08 Dec 2001-BMJ
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

33,785 citations

Proceedings Article
14 Jul 1996
TL;DR: The striking signature of Bose condensation was the sudden appearance of a bimodal velocity distribution below the critical temperature of ~2µK.
Abstract: Bose-Einstein condensation (BEC) has been observed in a dilute gas of sodium atoms. A Bose-Einstein condensate consists of a macroscopic population of the ground state of the system, and is a coherent state of matter. In an ideal gas, this phase transition is purely quantum-statistical. The study of BEC in weakly interacting systems which can be controlled and observed with precision holds the promise of revealing new macroscopic quantum phenomena that can be understood from first principles.

3,530 citations

Journal Article

1,633 citations

Journal ArticleDOI
TL;DR: Progress made during the last two decades in producing transgenic lines of different C3 crops with enhanced photosynthetic performance is discussed, which was reached by either the overexpression of C3 enzymes or transcription factors or the incorporation of genes encoding C4 enzymes into C3 plants.
Abstract: Stressful environments such as salinity, drought, and high temperature (heat) cause alterations in a wide range of physiological, biochemical, and molecular processes in plants. Photosynthesis, the most fundamental and intricate physiological process in all green plants, is also severely affected in all its phases by such stresses. Since the mechanism of photosynthesis involves various components, including photosynthetic pigments and photosystems, the electron transport system, and CO2 reduction pathways, any damage at any level caused by a stress may reduce the overall photosynthetic capacity of a green plant. Details of the stress-induced damage and adverse effects on different types of pigments, photosystems, components of electron transport system, alterations in the activities of enzymes involved in the mechanism of photosynthesis, and changes in various gas exchange characteristics, particularly of agricultural plants, are considered in this review. In addition, we discussed also progress made during the last two decades in producing transgenic lines of different C3 crops with enhanced photosynthetic performance, which was reached by either the overexpression of C3 enzymes or transcription factors or the incorporation of genes encoding C4 enzymes into C3 plants. We also discussed critically a current, worldwide effort to identify signaling components, such as transcription factors and protein kinases, particularly mitogen-activated protein kinases (MAPKs) involved in stress adaptation in agricultural plants.

1,435 citations