The colorimetric determination of nitrate anion in aqueous and solid samples utilizing an aromatic derivative in acidic solvent

Bartzatt, Ronald; Donigan, Laura

doi:10.1080/02772240410001688242

Cited by 16 publications

(10 citation statements)

References 21 publications

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“…al (Bartzatt & Donigan 2004). Here, 20µL of sample was placed in a 96 well plate and mixed with 90µL of diphenylamine solution (3.34g of diphenylamine in 14.4M H 2 SO 4 ) and 85µL of pure H 2 SO 4 was then added.…”

Section: Strains and Cultivationmentioning

confidence: 99%

Utilization of biodiesel-derived glycerol or xylose for increased growth and lipid production by indigenous microalgae

Leite

Paranjape

Abdelaziz

et al. 2015

Bioresource Technology

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The use of industrial wastes rich in mineral nutrients and carbon sources to increase the final microalgal biomass and lipid yield at a low cost is an important strategy to make algal biofuel technology viable. Using strains from the microalgal collection of the Université de Montréal, this report shows for the first time that microalgal strains can be grown on xylose, the major carbon source found in wastewater streams from pulp and paper industries, with an increase in growth rate of 2.8 fold in comparison to photoautotrophic growth, reaching up to µ=1.1/day. On glycerol, growth rates reached as high as µ=1.52/day. Lipid productivity increased up to 370% on glycerol and 180% on xylose for the strain LB1H10, showing the suitability of this strain for further development for biofuels production through mixotrophic cultivation.Final Version available online at: http://dx

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Section: Strains and Cultivationmentioning

confidence: 99%

Utilization of biodiesel-derived glycerol or xylose for increased growth and lipid production by indigenous microalgae

Leite

Paranjape

Abdelaziz

et al. 2015

Bioresource Technology

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“…The total carbohydrate content was obtained by using the phenol-sulfuric acid method [24]. Nitrate and ammonium uptake rates were assayed by the method of Bartzatt and Donigan [25] and Weatherburn [26], respectively.…”

Section: Methodsmentioning

confidence: 99%

Ammonium nitrate and iron nutrition effects on some nitrogen assimilation enzymes and metabolites in Spirulina platensis

Esen

Ürek

2014

Biotech and App Biochem

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The effect of various concentrations of ammonium nitrate (5-60 mM), an economical nitrogen source, on the growth, nitrate-ammonium uptake rates, production of some pigments and metabolites, and some nitrogen assimilation enzymes such as nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), and glutamate synthase (GOGAT) in Spirulina platensis (Gamont) Geitler was investigated. Ten millimolars of ammonium nitrate stimulated the growth, production of pigments and the other metabolites, and enzyme activities, whereas 30 and 60 mM ammonium nitrate caused inhibition. In the presence of 10 mM ammonium nitrate, different concentrations of iron were tried in the growth media of S. platensis. After achieving the best growth, levels of metabolite and pigment production, and enzyme activities in the presence of 10 mM ammonium nitrate as a nitrogen source, different iron concentrations (10-100 µM) were tried in the growth medium of S. platensis. The highest growth, pigment and metabolite levels, and enzyme activities were determined in the medium containing 50 µM iron and 10 mM ammonium nitrate. In this optimum condition, the highest dry biomass level, chlorophyll a, and pyruvate contents were obtained as 55.42 ± 3.8 mg mL(-1) , 93.114 ± 7.9 µg g(-1) , and 212.5 ± 18.7 µg g(-1) , respectively. The highest NR, NiR, GS, and GOGAT activities were 67.16 ± 5.1, 777.92 ± 52, 0.141 ± 0.01, and 44.45 ± 3.6, respectively. Additionally, 10 mM ammonium nitrate is an economical and efficient nitrogen source for nitrogen assimilation of S. platensis, and 50 µM iron is optimum for the growth of S. platensis.

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“…O ensaio é realizado acrescentando-se 1 mL de solução aquosa da amostra questionada a um tubo de ensaio e em seguida adicionamse gotas do reagente de Caron (até o limite de 1 mL desse reagente). Os isômeros de posição formados no produto da reação mostrada na figura 6 são os responsáveis pela cor azul intensa de um resultado positivo para a presença de nitrato na amostra questionada [25]. Importante salientar que esse mesmo reagente também é empregado na identificação de nitrito [24], ocasião em que o produto formado terá coloração violeta, conforme reação química mostrada na figura 7.…”

Section: Teste Para Detecção De Nitrato (No3 -)unclassified

Requisições de rotina e testes colorimétricos empregados em Química Forense: do preparo das soluções à descrição dos fenômenos químicos.

Costa¹,

Brito²

2020

Rev. Bras. Crimin.

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Em virtude da crescente criminalidade e da necessidade da prova pericial para uma persecução penal eficaz, mais serviços têm sido demandados dos laboratórios de química forense. A imprescindibilidade de realização de todos esses exames, aliados à sua heterogeneidade e ao limitado tempo para emissão de resultados na forma de laudos periciais, requer, além de outras boas práticas de laboratório, que os variados procedimentos metodológicos estejam sistematicamente descritos e organizados, garantindo o rigor científico e a qualidade das análises. Este trabalho, além de proporcionar uma revisão acerca de algumas metodologias empregadas em exames amiúde requisitados pelas autoridades competentes, discute o significado dos resultados dos fenômenos químicos decorrentes de tais exames, o que é fundamental para garantir clareza ao laudo pericial. A atuação profissional do autor, bem como pesquisas em livros, artigos científicos, teses, dissertações e manual de bancada de instituição de perícia criminal de natureza oficial, foram as bases para a consecução deste trabalho.

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The colorimetric determination of nitrate anion in aqueous and solid samples utilizing an aromatic derivative in acidic solvent

Cited by 16 publications

References 21 publications

Utilization of biodiesel-derived glycerol or xylose for increased growth and lipid production by indigenous microalgae

Utilization of biodiesel-derived glycerol or xylose for increased growth and lipid production by indigenous microalgae

Ammonium nitrate and iron nutrition effects on some nitrogen assimilation enzymes and metabolites in Spirulina platensis

Requisições de rotina e testes colorimétricos empregados em Química Forense: do preparo das soluções à descrição dos fenômenos químicos.

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