نتایج جستجو برای: extractive spectrophotometry

تعداد نتایج: 12437  

N Mathiyazhagan Natarajan D,

An ex-situ experiment to assess the metal extractive potential of fourteen agriculture plants (Vigna unguiculata, Gossypium hirsutum, Jatropha curcas, etc.) was conducted on Magnesite mines which had above permissible levels of Cadmium and Lead. There was no much difference in the total chlorophyll a and b, carbohydrate and protein contents in the plants grown in the mining soil and adjacent co...

In this work, copper oxide nanoparticles have been synthesized via extractive Rosmarinus Officinalis leaves by simple and economic co-precipitation method at ambient conditions which it has used (CH3COO)2Cu+H2O individually as Cu sources. It was found that uniform copper oxide nanoparticles have been successfully produced at various temperature, namely 400, 600, and 800 0C. Powder X-ray Diffrac...

Journal: :Indian Journal of Pharmaceutical Sciences 2022

Ultraviolet spectrophotometry has been successfully used for the qualitative as well quantitative determination of various phytoconstituents. For phytoconstituents in extract by ultraviolet spectrophotometry, absorbance at specific wavelength is measured. As a mixture number constituents, different constituents same along with compound interest can occur giving wrong interpretation observed dat...

2007
P. Gómez I. Gil

The aim of this work is to simulate and analyze an extractive distillation process (extractive distillation and recovery columns) for the separation of Tetrahydrofuran(THF)-Water azeotropic mixture using Aspen Plus® and Aspen Split simulators. Calculation of vapor liquid equilibrium of Tetrahydrofuran–Water– Entrainer system was done using the NRTL model, which binary interaction parameters wer...

2016
José Manuel Salgado Raquel Rodríguez José Antonio Curiel Blanca de las Rivas Rosario Muñoz José Manuel Domínguez

In situ extractive fermentation was used to produce 4-vinyl derivatives, from hydroxycinnamic acids extracted from corn cobs, by recombinant Escherichia coli containing the phenolic acid descarboxylase (PAD) gene. This microorganism mainly produced 4-vinylphenol (4VP) from p-coumaric acid (p-CA). In a first study, we observed that concentrations of 4VP >1 g/L had a negative impact on descarboxy...

Journal: :Journal of the Air & Waste Management Association 2009
Kenneth Cowen Bradley Goodwin Darrell Joseph Matthew Tefend Jan Satola Robert Kagann Ram Hashmonay Chester Spicer Michael Holdren Howard Mayfield

The Strategic Environmental Research and Development Program (SERDP) has initiated several programs to develop and evaluate techniques to characterize emissions from military aircraft to meet increasingly stringent regulatory requirements. This paper describes the results of a recent field study using extractive and optical remote sensing (ORS) techniques to measure emissions from six F-15 figh...

Journal: :IJIRR 2015
Chandra Shekhar Yadav Aditi Sharan

Summarization is a way to represent same information in concise way with equal sense. This can be categorized in two type Abstractive and Extractive type. Our work is focused around Extractive summarization. A generic approach to extractive summarization is to consider sentence as an entity, score each sentence based on some indicative features to ascertain the quality of sentence for inclusion...

2013
Swapnil A. Dharaskar Mahesh N. Varma Diwakar Z. Shende Chang Kyoo Yoo Kailas L. Wasewar

The possible application of imidazolium ionic liquids as energy-efficient green material for extractive deep desulfurization of liquid fuel has been investigated. 1-Butyl-3-methylimidazolium chloride [BMIM]Cl was synthesized by nucleophilic substitution reaction of n-methylimidazolium and 1-chlorobutane. Molecular structures of the ILs were confirmed by FTIR, (1)H-NMR, and (13)C-NMR. The therma...

2006
L. Subramanyam Sarma J. Rajesh Kumar K. Janardhan Reddy Varada Reddy

Piridoxal-4-fenil-3-tiossemicarbazona (PPT) é proposto como um novo reagente sensível para a determinação espectrofotométrica de zinco(II). PPT reage com zinco(II) no intervalo de pH entre 5,0 e 6,0, para formar um complexo colorido amarelo, o qual foi adequadamente extraído em n-butanol. A absorbância do complexo Zn(II)-PPT foi medida em diferentes intervalos de tempo, a 430 nm, para averiguar...

2006
Zhuli Xie Barbara Di Eugenio Peter C. Nelson

In this paper, we propose a novel framework for extractive summarization. Our framework allows the summarizer to adapt and improve itself. Experimental results show that our summarizer achieves higher evaluation scores by adapting to the given evaluation metrics.

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