LIVIVO - Search results -

Search results

Result 1 - 10 of total 590

Search options

Article: Growth and Photosynthetic Efficiency of Microalgae and Plants with Different Levels of Complexity Exposed to a Simulated M-Dwarf Starlight.

Battistuzzi, Mariano / Cocola, Lorenzo / Liistro, Elisabetta / Claudi, Riccardo / Poletto, Luca / La Rocca, Nicoletta

2023 Volume 13, Issue 8

Abstract: ... orbiting stars different from the Sun, such as M-dwarfs. These stars emit very low light in the visible and ... grow. After successfully testing procaryotic OPOs (cyanobacteria) under a simulated M-dwarf star ...

Abstract	Oxygenic photosynthetic organisms (OPOs) are primary producers on Earth and generate surface and atmospheric biosignatures, making them ideal targets to search for life from remote on Earth-like exoplanets orbiting stars different from the Sun, such as M-dwarfs. These stars emit very low light in the visible and most light in the far-red, an issue for OPOs, which mostly utilize visible light to photosynthesize and grow. After successfully testing procaryotic OPOs (cyanobacteria) under a simulated M-dwarf star spectrum (M7, 365-850 nm) generated through a custom-made lamp, we tested several eukaryotic OPOs: microalgae (
Language	English
Publishing date	2023-07-28
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2662250-6
ISSN	2075-1729
ISSN	2075-1729
DOI	10.3390/life13081641
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article: Oxygenic photosynthetic responses of cyanobacteria exposed under an M-dwarf starlight simulator: Implications for exoplanet's habitability.

Battistuzzi, Mariano / Cocola, Lorenzo / Claudi, Riccardo / Pozzer, Anna Caterina / Segalla, Anna / Simionato, Diana / Morosinotto, Tomas / Poletto, Luca / La Rocca, Nicoletta

Frontiers in plant science

2023 Volume 14, Page(s) 1070359

Abstract: ... exoplanets orbiting the Habitable Zone of M-dwarf stars, which have low light emission in the visible and ... the emission spectrum of an M-dwarf in the range 350-900 nm, we could answer this question.: Methods: We performed ... similarly under M-dwarf and solar light conditions: : Discussion: Our results experimentally show ...

Abstract	Introduction: The search for life on distant exoplanets is expected to rely on atmospheric biosignatures detection, such as oxygen of biological origin. However, it is not demonstrated how much oxygenic photosynthesis, which on Earth depends on visible light, could work under spectral conditions simulating exoplanets orbiting the Habitable Zone of M-dwarf stars, which have low light emission in the visible and high light emission in the far-red/near-infrared. By utilizing cyanobacteria, the first organisms to evolve oxygenic photosynthesis on our planet, and a starlight simulator capable of accurately reproducing the emission spectrum of an M-dwarf in the range 350-900 nm, we could answer this question. Methods: We performed experiments with the cyanobacterium Results: Both cyanobacteria were shown to grow and photosynthesize similarly under M-dwarf and solar light conditions: Discussion: Our results experimentally show that an M-dwarf light spectrum could support a biological oxygen production similar to that in solar light at the tested light intensities, suggesting the possibility to discover such atmospheric biosignatures on those exoplanets if other boundary conditions are met.
Language	English
Publishing date	2023-02-07
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2613694-6
ISSN	1664-462X
ISSN	1664-462X
DOI	10.3389/fpls.2023.1070359
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Book ; Online: Super-Earths, M Dwarfs, and Photosynthetic Organisms

Claudi, R. / Alei, E. / Battistuzzi, M. / Cocola, L. / Erculiani, M. S. / Pozzer, A. C. / Salasnich, B. / Simionato, D. / Squicciarini, V. / Poletto, L. / La Rocca, N.

Habitability in the Lab

2021

Abstract: ... of the realm of exoplanets is that 40\% of M dwarfs host super-Earths with a minimum mass between 1 and 30 ... absorption up to 750\ nm, suggests the possibility of exotic photosynthesis in planets around M dwarfs. Using ... innovative laboratory instrumentation, we exposed different cyanobacteria to an M dwarf star simulated ...

Abstract	In a few years, space telescopes will investigate our Galaxy to detect evidence of life, mainly by observing rocky planets. In the last decade, the observation of exoplanet atmospheres and the theoretical works on biosignature gasses have experienced a considerable acceleration. The~most attractive feature of the realm of exoplanets is that 40\% of M dwarfs host super-Earths with a minimum mass between 1 and 30 Earth masses, orbital periods shorter than 50 days, and radii between those of the Earth and Neptune (1--3.8 R$_\oplus$). Moreover, the recent finding of cyanobacteria able to use far-red (FR) light for oxygenic photosynthesis due to the synthesis of chlorophylls $d$ and $f$, extending in vivo light absorption up to 750\ nm, suggests the possibility of exotic photosynthesis in planets around M dwarfs. Using innovative laboratory instrumentation, we exposed different cyanobacteria to an M dwarf star simulated irradiation, comparing their responses to those under solar and FR simulated lights.~As expected, in FR light, only the cyanobacteria able to synthesize chlorophyll $d$ and $f$ could grow. Surprisingly, all strains, both able or unable to use FR light, grew and photosynthesized under the M dwarf generated spectrum in a similar way to the solar light and much more efficiently than under the FR one. Our findings highlight the importance of simulating both the visible and FR light components of an M dwarf spectrum to correctly evaluate the photosynthetic performances of oxygenic organisms exposed under such an exotic light~condition. Comment: 19 pages, 5 Figures. Published on Life,2021, 11, 10
Keywords	Astrophysics - Earth and Planetary Astrophysics ; Astrophysics - Instrumentation and Methods for Astrophysics ; Quantitative Biology - Biomolecules
Subject code	520
Publishing date	2021-01-12
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: Super-Earths, M Dwarfs, and Photosynthetic Organisms: Habitability in the Lab.

Claudi, Riccardo / Alei, Eleonora / Battistuzzi, Mariano / Cocola, Lorenzo / Erculiani, Marco Sergio / Pozzer, Anna Caterina / Salasnich, Bernardo / Simionato, Diana / Squicciarini, Vito / Poletto, Luca / La Rocca, Nicoletta

Life (Basel, Switzerland)

2020 Volume 11, Issue 1

Abstract: ... of the realm of exoplanets is that 40% of M dwarfs host super-Earths with a minimum mass between 1 and 30 Earth ...

Abstract	In a few years, space telescopes will investigate our Galaxy to detect evidence of life, mainly by observing rocky planets. In the last decade, the observation of exoplanet atmospheres and the theoretical works on biosignature gasses have experienced a considerable acceleration. The most attractive feature of the realm of exoplanets is that 40% of M dwarfs host super-Earths with a minimum mass between 1 and 30 Earth masses, orbital periods shorter than 50 days, and radii between those of the Earth and Neptune (1-3.8 R⊕). Moreover, the recent finding of cyanobacteria able to use far-red (FR) light for oxygenic photosynthesis due to the synthesis of chlorophylls
Language	English
Publishing date	2020-12-24
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2662250-6
ISSN	2075-1729
ISSN	2075-1729
DOI	10.3390/life11010010
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Super-Earths, M Dwarfs, and Photosynthetic Organisms

Riccardo Claudi / Eleonora Alei / Mariano Battistuzzi / Lorenzo Cocola / Marco Sergio Erculiani / Anna Caterina Pozzer / Bernardo Salasnich / Diana Simionato / Vito Squicciarini / Luca Poletto / Nicoletta La Rocca

Life, Vol 11, Iss 10, p

Habitability in the Lab

2021 Volume 10

Abstract: ... of the realm of exoplanets is that 40% of M dwarfs host super-Earths with a minimum mass between 1 and 30 Earth ... the possibility of exotic photosynthesis in planets around M dwarfs. Using innovative laboratory instrumentation ... we exposed different cyanobacteria to an M dwarf star simulated irradiation, comparing their responses ...

Abstract	In a few years, space telescopes will investigate our Galaxy to detect evidence of life, mainly by observing rocky planets. In the last decade, the observation of exoplanet atmospheres and the theoretical works on biosignature gasses have experienced a considerable acceleration. The most attractive feature of the realm of exoplanets is that 40% of M dwarfs host super-Earths with a minimum mass between 1 and 30 Earth masses, orbital periods shorter than 50 days, and radii between those of the Earth and Neptune (1–3.8 R <math display="inline"><semantics><msub><mrow></mrow><mo>⊕</mo></msub></semantics></math> ). Moreover, the recent finding of cyanobacteria able to use far-red (FR) light for oxygenic photosynthesis due to the synthesis of chlorophylls d and f , extending in vivo light absorption up to 750 nm, suggests the possibility of exotic photosynthesis in planets around M dwarfs. Using innovative laboratory instrumentation, we exposed different cyanobacteria to an M dwarf star simulated irradiation, comparing their responses to those under solar and FR simulated lights. As expected, in FR light, only the cyanobacteria able to synthesize chlorophyll d and f could grow. Surprisingly, all strains, both able or unable to use FR light, grew and photosynthesized under the M dwarf generated spectrum in a similar way to the solar light and much more efficiently than under the FR one. Our findings highlight the importance of simulating both the visible and FR light components of an M dwarf spectrum to correctly evaluate the photosynthetic performances of oxygenic organisms exposed under such an exotic light condition.
Keywords	astrobiology ; M stars ; super-Earths ; photosynthesis ; Science ; Q
Subject code	520
Language	English
Publishing date	2021-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Book ; Online: Lignin

Poletto, Matheus

Trends and Applications

2018

Keywords	Polymer chemistry ; ionic liquids, bioeconomy, biomass, cytotoxicity, biofuels, biorefinery
Language	English
Size	1 electronic resource (308 pages)
Publisher	IntechOpen
Document type	Book ; Online
Note	English
HBZ-ID	HT030647675
ISBN	9789535140566 ; 9535140566
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Book ; Online: Composites from Renewable and Sustainable Materials

Poletto, Matheus

2016

Keywords	Sustainability ; mechanical properties, chitosan, biocomposites, natural fibers, biomass, biomaterials
Language	English
Size	1 electronic resource (344 pages)
Publisher	IntechOpen
Document type	Book ; Online
Note	English
HBZ-ID	HT030646101
ISBN	9789535141457 ; 9535141457
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Effect of Graphene Oxide Surface Deposition Process on Synthetic Macrofibers and Its Results on the Microstructure of Fiber-Reinforced Concrete.

Cecconello, Vinício / Poletto, Matheus

Polymers

2024 Volume 16, Issue 8

Abstract: The improvement of the mechanical properties of concrete can be achieved with the use of synthetic macrofibers. However, this fiber-matrix interaction will be sufficiently efficient for tensile efforts only when there is a binding agent that associates ... ...

Abstract	The improvement of the mechanical properties of concrete can be achieved with the use of synthetic macrofibers. However, this fiber-matrix interaction will be sufficiently efficient for tensile efforts only when there is a binding agent that associates the characteristics of the paste with the characteristics of the surface of the reinforcing material. As already identified, in a first phase of this research using synthetic microfibers, a better fiber-matrix interaction can be achieved with the surface treatment of synthetic fibers with graphene oxide. In this way, we sought to evaluate the surface treatment with graphene oxide on two synthetic polypropylene macrofibers (macrofiber "A" and macrofiber "B") and its contribution to the concrete transition zone. The surface deposition on the macrofiber was carried out using the ultrasonication method; then, the macrofiber with the best deposition for creating reinforced concrete mixtures was identified. To evaluate the quality of GO deposition, scanning electron microscopy (SEM-FEG) and energy-dispersive spectroscopy (EDS) tests were carried out; the same technique was used to evaluate the macrofiber-matrix transition zone. The SEM-FEG images indicated that macrofiber "B" obtained greater homogeneity in surface deposition and it presented a 13% greater deposition of C in the EDS spectra. The SEM-FEG micrographs for reinforced concrete indicated a reduction in voids in the macrofiber-matrix transition zone for concretes that used macrofibers treated with GO.
Language	English
Publishing date	2024-04-21
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym16081168
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Reply to the Comment on “New horizons in photocatalysis: the importance of mesopores for cerium oxide” by A. S. Thill, W. T. Figueiredo, F. O. Lobato, M. O. Vaz, W. P. Fernandes, V. E. Carvalho, E. A. Soares, F. Poletto, S. R. Teixeira and F. Bernardi, J. Mater. Chem. A, 2020, 8, 24752

Thill, Alisson S. / Figueiredo, Wallace T. / Lobato, Francielli O. / Vaz, Mauricio O. / Fernandes, Willians P. / Carvalho, Vágner E. / Soares, Edmar A. / Poletto, Fernanda / Teixeira, Sérgio R. / Bernardi, Fabiano

Journal of materials chemistry A. 2021 Oct. 26, v. 9, no. 41

2021

Abstract: This reply presents a detailed explanation about the critique given by Prof. E. Paparazzo on the analysis of the Ce 3d XPS spectra described in the published article. The comment claims that the Ce(iii) fraction values found are too high for the Ce 3d ... ...

Abstract	This reply presents a detailed explanation about the critique given by Prof. E. Paparazzo on the analysis of the Ce 3d XPS spectra described in the published article. The comment claims that the Ce(iii) fraction values found are too high for the Ce 3d XPS spectra obtained, which is attributed to missing constraints in the fit procedure and charging effects during XPS measurements. The claims raised by the author are addressed in this reply but we believe that the author did not consider the full discussion present in the original article. Furthermore, even taking into account some claims raised for the Ce 3d XPS fit in the comment, the results are not significantly changed. New experiments and fit analysis were conducted and they are used to further prove the original results.
Keywords	ceric oxide ; journals ; materials ; measurement ; photocatalysis
Language	English
Dates of publication	2021-1026
Size	p. 23726-23730.
Publishing place	The Royal Society of Chemistry
Document type	Article
ZDB-ID	2702232-8
ISSN	2050-7496 ; 2050-7488
ISSN (online)	2050-7496
ISSN	2050-7488
DOI	10.1039/d1ta05387f
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Book ; Online: Cellulose

Poletto, Matheus / Luiz Ornaghi Junior, Heitor

Fundamental Aspects and Current Trends

2015

Keywords	Organic chemistry ; chemical modification, cellulose nanocrystals, adsorption, electrospinning, nanocomposites, chitosan
Language	English
Size	1 electronic resource (284 pages)
Publisher	IntechOpen
Document type	Book ; Online
Note	English
HBZ-ID	HT030646342
ISBN	9789535150596 ; 9535150596
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

To top

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED