Results 81 to 90 of about 88,515 (283)

Amido a partir de bambu [PDF]

open access: yesBragantia, 1984
Em colmos de bambu da espécie tida como Guadua flabellata, determinaram-se os teores de amido e das frações fibrosa, parenquimatosa e solúvel em água. O comprimento e o diâmetro dos colmos processados foram também determinados. Os resultados mostraram que o teor médio de amido extraído foi 8,53% (base seca), representando cerca de 59% da fração solúvel
openaire   +4 more sources

Combinatiorial method for surface-confined sensor desing and fabrication [PDF]

open access: yes, 2005
The procedure for the combinatorial fabrication of new sensing materials for cations and anions based on self-assembled monolayers (SAM) is discussed. A library of different sensitive substrates is generated by sequential deposition of fluorophores and ...
Basabe Desmonts, Lourdes   +3 more
core   +3 more sources

Aluminum Cations Stabilized by Hybrid N‐Heterocyclic Imine Ligand as Catalysts for Guanidine Synthesis from Carbodiimides and Anilines

open access: yesChemistry – An Asian Journal, EarlyView.
We reported four‐coordinate cationic aluminum catalysts stabilized by hybrid N‐heterocyclic imine (HAmImR) ligands. These aluminum cations exhibit excellent stability while efficiently catalyzing guanidines formation from anilines and carbodiimides.
Ting‐Wei Chang   +3 more
wiley   +1 more source

Phosphido pincer complexes of platinum: synthesis, structure and reactivity [PDF]

open access: yes, 2011
A series of platinum(II) complexes supported by the tridentate bis(phosphine)phosphido ligand bis(2-diisopropylphosphinophenyl)phosphide) [iPr–PPP] have been synthesized and characterized (1–4).
Kühl, Olaf   +3 more
core   +2 more sources

An Insight Into Necessity of Complete Electrolyte for Photogalvanics and Contribution of Thermal and Photo‐Processes in Solar Power Generation Through the Photo‐Galvanic Cells

open access: yesBattery Energy, EarlyView.
The reductant/sensitizer/etc. individually shows only thermally‐induced current in photogalvanic cell. Only, complete electrolyte is able to show solar energy conversion. Use of complete electrolyte is a necessary condition for solar power generation through the photogalvanics.
Reetoo, Pooran Koli, Jyoti Saren
wiley   +1 more source

Uso de Material Arqueológico no Estudo de Evolução de Plantas

open access: yesRevista de Arqueologia, 2004
Amostras arqueológicas de milho – Zea mays e mandioca – Manihot esculenta, do Vale do Peruaçu - MG, Brasil, com idades entre 1010 e 570 anos B.P., foram estudadas.
Fábio de Oliveira Freitas
doaj   +1 more source

Chemical Switching Behaviour of Tricarbonylrhenium(I) Complexes of a New Redox Active ‘Pincer’ Ligand [PDF]

open access: yes, 2010
The structures and optoelectronic properties of tricarbonylrhenium(I) complexes of di(2-pyrazolyl-p-tolyl)amine in its neutral and deprotonated (uninegative amido) form were investigated.
Bennett, Brian   +5 more
core   +1 more source

Advances in Ligand‐Driven Pd‐Catalyzed C─H Functionalizations: Recent Insights and Updates

open access: yesChemCatChem, EarlyView.
The most significant advances in ligand‐driven Pd‐catalyzed organic synthesis over the past two years are presented. Processes involving C─H activation of substrates, avoiding their prefunctionalization are illustrated. Both the activity and selectivity of the catalyst depend on the design of the ligands (pyridones, pyridines, amino acids, phosphines ...
Jesús Moradell   +3 more
wiley   +1 more source

Boron affects the growth and ultrastructure of castor bean plants Boro afeta o crescimento e a ultra-estrutura da mamoneira

open access: yesScientia Agricola, 2008
The cultivation of oleaginous plants like the castor bean guarantees employment for agricultural families and can contribute in energy and chemical sectors, especially in the northeastern semi-arid regions of Brazil.
Denis Herisson da Silva   +4 more
doaj   +1 more source

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