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Article: Structural, Mechanical, and Decorative Properties of Sputtered TiN and Ti (N, C) Films for Orthodontic Applications; an In Vitro Study.

Suciu, Victor / Ferreira, Armando / Correa, Marcio A / Vaz, Filipe / Munteanu, Daniel

2021 Volume 14, Issue 18

Abstract: ... composed by TiN and Ti (N, C) with a wide range of N ...

Abstract	In this paper, we explore and modify the structural, mechanical, and decorative properties of films composed by TiN and Ti (N, C) with a wide range of N
Language	English
Publishing date	2021-09-09
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma14185175
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: DszA Catalyzes C-S Bond Cleavage through N

Ferreira, Pedro / Neves, Rui P P / Miranda, Filipa P / Cunha, Ana V / Havenith, Remco W A / Ramos, Maria J / Fernandes, Pedro A

Journal of chemical information and modeling

2024

Abstract: Due to its detrimental impact on human health and the environment, regulations demand ultralow sulfur levels on fossil fuels, in particular in diesel. However, current desulfurization techniques are expensive and cannot efficiently remove heteroaromatic ... ...

Abstract	Due to its detrimental impact on human health and the environment, regulations demand ultralow sulfur levels on fossil fuels, in particular in diesel. However, current desulfurization techniques are expensive and cannot efficiently remove heteroaromatic sulfur compounds, which are abundant in crude oil and concentrate in the diesel fraction after distillation. Biodesulfurization
Language	English
Publishing date	2024-04-29
Publishing country	United States
Document type	Journal Article
ZDB-ID	190019-5
ISSN	1549-960X ; 0095-2338
ISSN (online)	1549-960X
ISSN	0095-2338
DOI	10.1021/acs.jcim.4c00301
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Zs.A 1230: Show issues

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Article ; Online: Synthesis of new β-amidodehydroaminobutyric acid derivatives and of new tyrosine derivatives using copper catalyzed C-N and C-O coupling reactions.

Pereira, G / Vilaça, H / Ferreira, P M T

Amino acids

2013 Volume 44, Issue 2, Page(s) 335–344

Abstract: Several β-amidodehydroaminobutyric acid derivatives were prepared from N,C-diprotected β ... bromodehydroaminobutyric acids and amides by a copper catalyzed C-N coupling reaction. The best reaction conditions include ... the use of a catalytic amount of CuI, N,N'-dimethylethylenediamine as ligand and K(2)CO(3) as base ...

Abstract	Several β-amidodehydroaminobutyric acid derivatives were prepared from N,C-diprotected β-bromodehydroaminobutyric acids and amides by a copper catalyzed C-N coupling reaction. The best reaction conditions include the use of a catalytic amount of CuI, N,N'-dimethylethylenediamine as ligand and K(2)CO(3) as base in toluene at 110 °C. The stereochemistry of the products was determined using NOE difference experiments and the results obtained are in agreement with an E-stereochemistry. Thus, the stereochemistry is maintained in the case of the E-isomers of β-bromodehydroaminobutyric acid derivatives, but when the Z-isomers were used as substrates the reaction proceeds with inversion of configuration. The use of β-bromodehydrodipeptides as substrates was also tested. It was found that the reaction outcome depend on the stereochemistry of the β-bromodehydrodipeptide and on the nature of the first amino acid residue. The products isolated were the β-amidodehydrodipeptide derivatives and/or the corresponding dihydropyrazines. The same catalytic system (CuI/N,N'-dimethylethylene diamine) was used in the C-O coupling reactions between a tyrosine derivative and aryl bromides. The new O-aryltyrosine derivatives were isolated in moderate to good yields. The photophysical properties of two of these compounds were studied in four solvents of different polarity. The results show that these compounds after deprotection can be used as fluorescence markers.
MeSH term(s)	Catalysis ; Copper/chemistry ; Molecular Structure ; Stereoisomerism ; Tyrosine/chemistry ; gamma-Aminobutyric Acid/analogs & derivatives ; gamma-Aminobutyric Acid/chemical synthesis ; gamma-Aminobutyric Acid/chemistry
Chemical Substances	Tyrosine (42HK56048U) ; gamma-Aminobutyric Acid (56-12-2) ; alpha, beta-dehydroaminobutyric acid (71018-10-5) ; Copper (789U1901C5)
Language	English
Publishing date	2013-02
Publishing country	Austria
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1121341-3
ISSN	1438-2199 ; 0939-4451
ISSN (online)	1438-2199
ISSN	0939-4451
DOI	10.1007/s00726-012-1337-4
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Zs.A 3490: Show issues

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Article ; Online: Miniprojeto para ensino de Química Orgânica Experimental baseado no acoplamento catalítico N-C promovido por micro-ondas

Michelle Dalmás / Neusa Fernandes de Moura / Gilber Ricardo Rosa / Cristina Lorenski Ferreira / João Augusto Oliveira dos Santos / Thais Kazakevicius Bolzan / Fernando Kokubun

Química Nova, Vol 36, Iss 9, Pp 1464-

2013 Volume 1467

Abstract: ... The activities include N-C cross-coupling synthesis of N-(4-methoxyphenyl) benzamide in an adapted microwave oven ...

Abstract	This paper describes a three-week mini-project for an Experimental Organic Chemistry course. The activities include N-C cross-coupling synthesis of N-(4-methoxyphenyl) benzamide in an adapted microwave oven by a copper catalyst (CuI). Abilities and concepts normally present in practical organic chemistry courses are covered: use of balances, volumetric glassware, separation of mixtures (liquid-liquid extraction and filtration), chromatographic techniques, melting point determination and stoichiometric calculations.
Keywords	N-C cross-coupling ; microwave ; chemical education ; Chemistry ; QD1-999
Language	English
Publishing date	2013-01-01T00:00:00Z
Publisher	Sociedade Brasileira de Química
Document type	Article ; Online
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Article ; Online: Nanosilica modulates C:N:P stoichiometry attenuating phosphorus toxicity more than deficiency in Megathyrsus maximus cultivated in an Oxisol and Entisol.

de Faria Melo, Cíntia Cármen / Silva Amaral, Danilo / de Mello Prado, Renato / de Moura Zanine, Anderson / de Jesus Ferreira, Daniele / de Cássia Piccolo, Marisa

Scientific reports

2023 Volume 13, Issue 1, Page(s) 10284

Abstract: Silicon (Si) nanoparticles can attenuate nutritional disorders caused by phosphorus in forages through nutritional homeostasis. This paper aims to evaluate the effects of P deficiency and toxicity in Megathyrsus maximus cultivated in two types of soils ... ...

Abstract	Silicon (Si) nanoparticles can attenuate nutritional disorders caused by phosphorus in forages through nutritional homeostasis. This paper aims to evaluate the effects of P deficiency and toxicity in Megathyrsus maximus cultivated in two types of soils and to verify whether Si application via fertigation can mitigate these imbalances. The following two experiments were carried out: cultivation of forage plants in pots with Entisol and Oxisol, in a 3 × 2 factorial design, with three nutritional levels of phosphorus (deficient, adequate, and excessive) and two Si concentrations in the irrigation water (0 and 1.5 mmol L
MeSH term(s)	Silicon/pharmacology ; Poaceae ; Phosphorus ; Plants ; Water
Chemical Substances	Silicon (Z4152N8IUI) ; Phosphorus (27YLU75U4W) ; Water (059QF0KO0R)
Language	English
Publishing date	2023-06-24
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-023-37504-3
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Article ; Online: C and N stocks in silvopastoral systems with high and low tree diversity: Evidence from a twenty-two year old field study.

Cá, Jorge / Lustosa Filho, José Ferreira / da Silva, Neilson Rocha / de Castro, Carlos Renato Tavares / de Oliveira, Teogenes Senna

The Science of the total environment

2022 Volume 833, Page(s) 155298

Abstract: This paper aimed to quantify the C and N stocks and the natural abundancy of ...

Abstract	This paper aimed to quantify the C and N stocks and the natural abundancy of
MeSH term(s)	Carbon ; Ecosystem ; Fabaceae ; Minerals ; Soil/chemistry ; Trees
Chemical Substances	Minerals ; Soil ; Carbon (7440-44-0)
Language	English
Publishing date	2022-04-14
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2022.155298
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Article ; Online: Native multispecies and fast-growing forest root biomass increase C and N stocks in a reclaimed bauxite mining area.

de Almeida Valente, Fernanda Daniele / de Castro, Marllon Fialho / Lustosa Filho, José Ferreira / de Carvalho Gomes, Lucas / Neves, Júlio Cesar Lima / da Silva, Ivo Ribeiro / de Oliveira, Teógenes Senna

Environmental monitoring and assessment

2022 Volume 195, Issue 1, Page(s) 129

Abstract: This study is aimed at evaluating C and N stocks in fractions of soil organic matter (SOM ... and a natural forest cover as a reference site). The total organic C (TOC) and N (TN) stocks and also ... biomass (MB), and labile C (LC), were determined, as well as the C/N ratio and the carbon management index ...

Abstract	This study is aimed at evaluating C and N stocks in fractions of soil organic matter (SOM) in an area of bauxite mining under recovery with tree species. We have analyzed the long-term recovery of C and N stocks of organic matter fractions from five types of forest cover (Eucalyptus, Anadenanthera peregrina, mixed plantation of 16 native species, a mined area without vegetation cover as a control site, and a natural forest cover as a reference site). The total organic C (TOC) and N (TN) stocks and also organic matter fractions, particulate organic matter (POM), mineral-associated organic matter (MAOM), microbial biomass (MB), and labile C (LC), were determined, as well as the C/N ratio and the carbon management index (CMI). Although the stocks of TOC and LC, CMI, and MB did not differ between the types of forest cover in the 0-60 cm layer, they were lower than the values in the native forest. Forest cover increases the stocks of TOC, LC, MB, and CMI in the area of bauxite mining compared to the control site. In addition, we found that the TOC C and TN stocks and also SOM fractions (LC, C-MAOM, C-POM, N-MAOM, and N-POM) are positively correlated (r ≥ 0.71 for all cases) with volume of roots larger than 2 mm. Therefore, Eucalyptus, A. peregrina, and a mixed of 16 native trees contribute for restoring stocks of soil C and N following bauxite mining in the Brazilian Atlantic Forest.
MeSH term(s)	Biomass ; Aluminum Oxide ; Environmental Monitoring ; Forests ; Soil ; Carbon/analysis ; Trees ; Eucalyptus
Chemical Substances	Aluminum Oxide (LMI26O6933) ; Soil ; Carbon (7440-44-0)
Language	English
Publishing date	2022-11-21
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	782621-7
ISSN	1573-2959 ; 0167-6369
ISSN (online)	1573-2959
ISSN	0167-6369
DOI	10.1007/s10661-022-10720-6
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Nanosilica modulates C:N:P stoichiometry attenuating phosphorus toxicity more than deficiency in Megathyrsus maximus cultivated in an Oxisol and Entisol

Cíntia Cármen de Faria Melo / Danilo Silva Amaral / Renato de Mello Prado / Anderson de Moura Zanine / Daniele de Jesus Ferreira / Marisa de Cássia Piccolo

Scientific Reports, Vol 13, Iss 1, Pp 1-

2023 Volume 15

Abstract: ... mmol L−1). Height, number of tillers, rate of leaf senescence, dry matter production, C:N, C:Si, C:P ... and N:P ratios; and C, P, and N use efficiencies were evaluated in two growth cycles. P imbalances ... hampered carbon assimilation, C:N:P homeostasis, and dry matter production. Nanosilica fertigation promoted ...

Abstract	Abstract Silicon (Si) nanoparticles can attenuate nutritional disorders caused by phosphorus in forages through nutritional homeostasis. This paper aims to evaluate the effects of P deficiency and toxicity in Megathyrsus maximus cultivated in two types of soils and to verify whether Si application via fertigation can mitigate these imbalances. The following two experiments were carried out: cultivation of forage plants in pots with Entisol and Oxisol, in a 3 × 2 factorial design, with three nutritional levels of phosphorus (deficient, adequate, and excessive) and two Si concentrations in the irrigation water (0 and 1.5 mmol L−1). Height, number of tillers, rate of leaf senescence, dry matter production, C:N, C:Si, C:P, and N:P ratios; and C, P, and N use efficiencies were evaluated in two growth cycles. P imbalances hampered carbon assimilation, C:N:P homeostasis, and dry matter production. Nanosilica fertigation promoted silicon uptake, improving C:N:P homeostasis and nutritional efficiency in plants under P deficiency and toxicity. Leaf senescence was reduced with addition of Si in plants grown in Oxisol in the three nutritional states of P. Silicon attenuated the stress caused by P toxicity in Entisol and Oxisol, improving production in plants without nutritional stress in Oxisol. The supply of Si nanoparticles in the cultivation of M. maximus can contribute to a more efficient and sustainable use of phosphorus in pastures.
Keywords	Medicine ; R ; Science ; Q
Subject code	580
Language	English
Publishing date	2023-06-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Native multispecies and fast-growing forest root biomass increase C and N stocks in a reclaimed bauxite mining area

de Almeida Valente, Fernanda Daniele / de Castro, Marllon Fialho / Lustosa Filho, José Ferreira / de Carvalho Gomes, Lucas / Neves, Júlio Cesar Lima / da Silva, Ivo Ribeiro / Oliveira, Teógenes Senna de

Environ Monit Assess. 2023 Jan., v. 195, no. 1 p.129-129

2023

Abstract	This study is aimed at evaluating C and N stocks in fractions of soil organic matter (SOM) in an area of bauxite mining under recovery with tree species. We have analyzed the long-term recovery of C and N stocks of organic matter fractions from five types of forest cover (Eucalyptus, Anadenanthera peregrina, mixed plantation of 16 native species, a mined area without vegetation cover as a control site, and a natural forest cover as a reference site). The total organic C (TOC) and N (TN) stocks and also organic matter fractions, particulate organic matter (POM), mineral-associated organic matter (MAOM), microbial biomass (MB), and labile C (LC), were determined, as well as the C/N ratio and the carbon management index (CMI). Although the stocks of TOC and LC, CMI, and MB did not differ between the types of forest cover in the 0–60 cm layer, they were lower than the values in the native forest. Forest cover increases the stocks of TOC, LC, MB, and CMI in the area of bauxite mining compared to the control site. In addition, we found that the TOC C and TN stocks and also SOM fractions (LC, C-MAOM, C-POM, N-MAOM, and N-POM) are positively correlated (r ≥ 0.71 for all cases) with volume of roots larger than 2 mm. Therefore, Eucalyptus, A. peregrina, and a mixed of 16 native trees contribute for restoring stocks of soil C and N following bauxite mining in the Brazilian Atlantic Forest.
Keywords	Anadenanthera peregrina ; Eucalyptus ; bauxite ; carbon ; forests ; indigenous species ; microbial biomass ; particulate organic matter ; soil ; soil organic matter ; trees ; vegetation cover
Language	English
Dates of publication	2023-01
Size	p. 129.
Publishing place	Springer International Publishing
Document type	Article ; Online
ZDB-ID	782621-7
ISSN	1573-2959 ; 0167-6369
ISSN (online)	1573-2959
ISSN	0167-6369
DOI	10.1007/s10661-022-10720-6
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Tridiscorhabdin and Didiscorhabdin, the First Discorhabdin Oligomers Linked with a Direct C-N Bridge from the Sponge

Li, Fengjie / Pandey, Pankaj / Janussen, Dorte / Chittiboyina, Amar G / Ferreira, Daneel / Tasdemir, Deniz

Journal of natural products

2020 Volume 83, Issue 3, Page(s) 706–713

Abstract: Guided by LC-MS/MS molecular networking-based metabolomics and cytotoxic activity, two new discorhabdin-type alkaloids, tridiscorhabdin ( ...

Abstract	Guided by LC-MS/MS molecular networking-based metabolomics and cytotoxic activity, two new discorhabdin-type alkaloids, tridiscorhabdin (
MeSH term(s)	Alkaloids/isolation & purification ; Alkaloids/pharmacology ; Animals ; Antarctic Regions ; Antineoplastic Agents/isolation & purification ; Antineoplastic Agents/pharmacology ; Biological Products/isolation & purification ; Biological Products/pharmacology ; Cell Line, Tumor ; Humans ; Molecular Structure ; Porifera/chemistry
Chemical Substances	Alkaloids ; Antineoplastic Agents ; Biological Products
Language	English
Publishing date	2020-02-27
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	304325-3
ISSN	1520-6025 ; 0163-3864
ISSN (online)	1520-6025
ISSN	0163-3864
DOI	10.1021/acs.jnatprod.0c00023
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