Recent Advances in Polymer Fractionation

Tung, L. H.

doi:10.1080/15321797108068156

Cited by 15 publications

(1 citation statement)

References 149 publications

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“…• Small amount of mobile phase required. Demerits: In this type of chromatography filtration must be done before using it (Williams, 1970;Tung, 1971).…”

Section: Gel Permeation Chromatography-mentioning

confidence: 99%

Phytochemicals: Extraction, Isolation Methods,identification and Therapeutic Uses: A Review

Sindhu¹,

Kaur²,

Manshu³

et al. 2021

PLANT ARCHIVES

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Phytoconstituents refers to the compounds which are chemical in nature that eventuate in plants. These compounds are non-nutrient compounds which are bioactive and helps in preserving the plants from various kinds of infections or other kinds of pathogens or microorganisms whereas some are creditworthy for the organoleptic characteristics. These compounds are synthesized within the plants from end to end of primary and secondary metabolic pathways. Various active components are discovered and are included in various categories. These active components include alkaloids, glycosides, volatile oils, phenolics, saponins and tannins etc.. Extraction of these compounds can be done by various methods. For the purpose of extraction that is to extract active components from the plants, high accuracy is needed along with different types of solvents with differing polarities. Various studies done on these experiments tells us that high polarity solvents have high effects. Various extraction techniques are maceration, infusion, decoction, percolation, digestion, soxhlet extraction, aqueous alcoholic extraction by fermentation, supercritical fluid extraction, etc.. These types of techniques are very useful in extraction process. The active components are isolated and purified for requirements. These are done by various chromatographic techniques such as Thin layer chromatography, gel permeation chromatography, etc.. The diverse form of processes for the active components are reviewed in this paper.

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“…• Small amount of mobile phase required. Demerits: In this type of chromatography filtration must be done before using it (Williams, 1970;Tung, 1971).…”

Section: Gel Permeation Chromatography-mentioning

confidence: 99%

Phytochemicals: Extraction, Isolation Methods,identification and Therapeutic Uses: A Review

Sindhu¹,

Kaur²,

Manshu³

et al. 2021

PLANT ARCHIVES

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Fractionation of Polymers

Barrales‐Rienda

Bello

et al. 1999

The Wiley Database of Polymer Properties

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Gel permeation chromatography: Universal calibration for polypropylene

Atkinson

Dietz

1976

Makromol. Chem.

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Twelve well-characterized fractions of polypropylene and a set of polystyrene standard samples are used to establish the universal calibration in gel permeation chromatography for polypropylene in 1,2-dichlorobenzene at 135°C. The Mark-Houwink relation under those conditions and the unperturbed dimensions are determined for polypropylene. Comparisons are made with earlier work with less well characterized samples. ZUSAMMENFASSUNG:Zwolf gut charakterisierte Polypropylen-Fraktionen und ein Satz von Polystyrol-Standardpraparaten werden benutzt, um fur Polypropylen in 1,2-Dichlorbenzol bei 135 "C eine universelle Eichbeziehung fur die Gelchromatographie aufzustellen. Die Viskositats-Molekulargewichtsbeziehung unter diesen Bedingungen und die ungestorten Dimensionen werden fur Polypropylen bestimmt. Die Ergebnisse werden mit alteren Messungen an weniger gut charakterisierten Praparaten verglichen. *) Throughout this paper the term "molecular weight" replaces the more correct "relative molecular mass". 2 0 $ at 135 "C). z 5' b, In 1-chloronaphthalene at 140°C and 546nm; estimated from ref."). By vapour pressure osmometry; the rest by membrane osmometry. e, Solutions were coloured; R, estimated from [ q ] vs. M , relation. ' ) Estimated from GPC and M,. a) mn (by membrane osmometry), m, (by light scattering), and a, (determined from Eq. (2) with a=0,7) are the number, weight, and viscosity average molecular weights; dn/dc: refractive index increment; [q] : intrinsic viscosity (measured in 1,2-dichlorobenzene 3 z 7 3 d, Uncertainty in M,, estimated to be f 10%. u' 9) NBS standard linear polyethylene used as calibrant. 2 c! v,

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Recent Advances in Polymer Fractionation

Cited by 15 publications

References 149 publications

Phytochemicals: Extraction, Isolation Methods,identification and Therapeutic Uses: A Review

Phytochemicals: Extraction, Isolation Methods,identification and Therapeutic Uses: A Review

Fractionation of Polymers

Gel permeation chromatography: Universal calibration for polypropylene

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