A direct comparison of the Pregl, Dumas, Perkin-Elmer, and Hewlett-Packard(F&amp;M) carbon-hydrogen-nitrogen procedures

Childs, C.E.; Henner, E.B.

doi:10.1016/0026-265x(70)90102-5

Cited by 21 publications

(6 citation statements)

References 7 publications

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“…The VA and GA content of the biocomposite samples was estimated using elemental analysis of carbon and hydrogen and according to Pregl's procedure [40]. The sample moisture content was measured using a Mettler Toledo HG 63 moisture analyzer (heating up to 105°C).…”

Section: Determination Of Va and Ga Loading And In Vitro Release Studymentioning

confidence: 99%

New hybrid materials based on layered double hydroxides and antioxidant compounds. Preparation, characterization and release kinetic studies

Silion¹,

Hritcu

Lisă

et al. 2011

J Porous Mater

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New hybrid materials were obtained by intercalation of the antioxidant compounds vanillic acid and gallic acid in layered double hydroxides (LDHs) resulting formulations with controlled release and antioxidant activity. The hybrid materials were prepared by using two methods: coprecipitation and ion exchange. X-ray powder diffraction, infrared spectroscopy and thermogravimetric analysis confirmed that the antioxidant molecules were intercalated into interlayer spaces of LDHs. The release of the antioxidant compounds was investigated in simulated gastrointestinal solution at 37°C and monitored using a spectrophotometric method. The results prove that these hybrid biocomposites can be classified as controlled release formulations for the antioxidant compounds under study.

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Section: Determination Of Va and Ga Loading And In Vitro Release Studymentioning

confidence: 99%

New hybrid materials based on layered double hydroxides and antioxidant compounds. Preparation, characterization and release kinetic studies

Silion¹,

Hritcu

Lisă

et al. 2011

J Porous Mater

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show abstract

“…However, practicable methods for the determination of this elemental carbon in such materials, ranging between 0.00X and 0.X percent by weight in pelagic sediments, are not to be found in the literature. Methods currently employed to determine carbon in materials of similar composition (2)(3)(4)(5) involve the combustion of carbon with subsequent determination of the resulting carbon dioxide. Analyses of this kind may include carbon from organic and carbonate sources, as well as any in the elementary state, and when employed at or below the ppm level, are complicated by reagent and equipment blanks.…”

mentioning

confidence: 99%

Spectrometric method for the quantitative determination of elemental carbon

Smith¹,

Griffin²,

Goldberg³

1975

Anal. Chem.

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“…Briefly, a sample of 5 g soil:20 mL Mehlich-1 solution was used for analysis. Analysis of N, S, and C were based on the Pregl-Dumas method [ 56 , 57 ] using a C/N/S elemental analyzer with thermal conductivity cells (LECOCNS-2000 elemental analyzer, LECO Corporation, St. Joseph, MI, USA). Oxygen atmosphere at 1350 °C was used to combust soil samples and to convert elemental N, S, and C into N 2 , SO 2 , and CO 2 gases.…”

Section: Methodsmentioning

confidence: 99%

Cottonseed Protein, Oil, and Minerals in Cotton (Gossypium hirsutum L.) Lines Differing in Curly Leaf Morphology

Bellaloui

Turley

Stetina

2021

Plants

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Cottonseed is an important source of protein, oil, and minerals for human health and livestock feed. Therefore, understanding the physiological and genetic traits influencing the nutrient content is critical. To our knowledge, there is no information available on the effects of leaf shape—curly leaf (CRL)—on cottonseed protein, oil, and minerals. Therefore, the objective of the current research was to investigate the effect of the curly leaf trait on cottonseed protein, oil, and minerals in cotton lines differing in leaf shape. Our hypothesis was that since leaf shape is known to be associated with nutrient uptake, assimilation, and photosynthesis process, leaf shape can influence seed protein, oil, and minerals. A two-year field experiment using two curly leaf lines (Uzbek CRL and DP 5690 CRL) and one normal leaf (DP 5690 wild type) line was conducted in 2014 and 2015 in Stoneville, MS, USA. The experiment was a randomized complete block design with three replicates. The results showed that both Uzbek CRL and DP 5690 wild type lines had higher seed oil, and nutrients N, P, K, and Mg than DP 5690 CRL. Calcium was higher in DP 5690 CRL for two years and protein was only higher than the parents in 2015. Consistent significant positive and negative correlations between some nutrients were observed, which may be due to environmental conditions, especially heat. This indicates that curly leaf trait may partially regulate the accumulation of these nutrients in seeds. The results demonstrated that leaf shape trait—curly leaf—can affect cottonseed nutritional qualities. This research is important to breeders for cotton selection for high seed oil or protein, and to other researchers to further understand the genetic impact of leaf shapes on seed nutritional quality. It is also important for scientists to use leaf shape as a tool for physiological, biochemical, and morphological research related to leaf development.

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A direct comparison of the Pregl, Dumas, Perkin-Elmer, and Hewlett-Packard(F&M) carbon-hydrogen-nitrogen procedures

Cited by 21 publications

References 7 publications

New hybrid materials based on layered double hydroxides and antioxidant compounds. Preparation, characterization and release kinetic studies

New hybrid materials based on layered double hydroxides and antioxidant compounds. Preparation, characterization and release kinetic studies

Spectrometric method for the quantitative determination of elemental carbon

Cottonseed Protein, Oil, and Minerals in Cotton (Gossypium hirsutum L.) Lines Differing in Curly Leaf Morphology

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