The use of bulk density measurements as flowability indicators

Abdullah, Ezzat Chan; Geldart, D.

doi:10.1016/s0032-5910(98)00208-3

Cited by 445 publications

(236 citation statements)

References 12 publications

Supporting

Mentioning

222

Contrasting

Unclassified

Order By: Relevance

“…Flow properties of taro powders Flow properties of the powders were measured using a Hosokawa Powder Tester following the procedures described by Abdullah and Geldart (1999). In this respect the angle of repose (AOR), the aerated bulk density, the tapped bulk density, the dispersibility and compressibility measurements were taken as flowability indicators.…”

Section: Planting Experimentsmentioning

confidence: 99%

Physicochemical and thermal properties of taro (Colocasia esculenta sp) powders as affected by state of maturity and drying method

et al. 2012

View full text Add to dashboard Cite

The study was aimed at determining the effect of harvesting time and drying method on the thermal and physicochemical properties of taro powder, Sosso ecotype. A 5×2 factorial experiment with 5 harvesting times (6, 7, 8, 9 and 10 months after planting) and 2 drying methods (sun and electric oven drying) was used for this purpose. The variance component analysis revealed harvesting time as the most important factor affecting all the variables measured. In particular the proteins and available sugar contents of the powders increased significantly with increase in harvesting time. The same was true of the gelling property and water absorption capacity of the powders. It was equally observed that the temperatures (start, peak and end) and enthalpy of gelatinization of the powders increased with harvesting time. It is concluded that harvesting sosso-taro at full maturity (10 months after planting) and sun-drying produces food powders with excellent gelling properties among others.

show abstract

Section: Planting Experimentsmentioning

confidence: 99%

Physicochemical and thermal properties of taro (Colocasia esculenta sp) powders as affected by state of maturity and drying method

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Co-processing of certain conventional excipients by spray drying, results in the film-coating of the substrate material by adsorbing a thin film of the coating material on the substrate's surface thereby improving its surface characteristics and other functional properties. Co-processing of cellulose with amorphous silicon dioxide and cassava starch with colloidal silica has resulted in seemly novel product with enhanced physicochemical and functional properties of the substrate material (Missagh and Fassihi 2004;Abdullah and Geldart, 1999;Ebenehi et al 2013). Spray-drying the mixture of the colloidal dispersions of CaPol and the modified starch grains was aimed at adsorbing films of the former on the latter.…”

Section: Preparation Of Film-coated Starch Particles By Spraydryingmentioning

confidence: 99%

“…Starch essentially swells in hot water but minimally in cold water (Abdullah and Geldart, 1999;Ebenehi et al, 2013;Fazaeli et al 2012;Rawlings, 1982). Though swelling is not the principal mechanism by which starch functions as a disintegrant nevertheless, when cold water is added to it, the granules absorb some quantities of water.…”

Section: Swelling Capacitymentioning

confidence: 99%

See 1 more Smart Citation

Preparation and evaluation of carbopol coated maize starch: A novel multifunctional excipient

Builders¹,

Mbah²,

Mohammed³

2017

Afr. J. Pharm. Pharmacol.

View full text Add to dashboard Cite

The aim of this study was to enhance the classical adjuvant functionality of maize starch (Mst) by coprocessing with small quantities of carbopol 974P (CaPol). A pre-processed maize starch (MpS) was coated with different concentrations of CaPol corresponding to 0.25, 0.5, 0.75 and 1.0 %w/w and spraydried at controlled conditions to produce the CaPol-coated motifs (MpS-CaPol). The relevant physicochemical and functional properties of the new CaPol-coated starch, as a direct compression and rapid disintegrating adjuvant were evaluated in the preparation of acetyl salicylic acid (ASA) tablets. The yield of MpS-CaPol produced with the various mix were between 87 to 95% of the weight of the start ingredients. There were no remarkable differences in the relevant physicochemical and functional properties determined for Mst and MpS thus, the results of MpS were not presented. There were no remarkable morphological differences between the particles of Mst and those of the coated motifs. The variants of the new starch motif showed properties that were sensitive to the concentrations of CaPol used in the coating. All the variants of MpS-CaPol generally showed comparative enhanced flow and moisture uptake. The swelling capacity of the new excipients containing different concentrations of CaPol can be ranked thus: 1 > 0.75 > 0.5 > 0.25 > 0% (Mst). The ASA tablets showed relative increased tensile strength and dissolution as the concentrations of CaPol increased (0 to 0.75%). The disintegration time were remarkably modified: The tablets prepared with new excipients containing CaPol of concentrations 0.25 to 0.75 %w/w all disintegrated rapidly within 1 min while that containing 1% w/w disintegrated at 45 ± 0.5 min; ASA tablets without disintegrant did not disintegrate even after 120 min. This study has shown that spray-dried Mst granules coated with small quantities of CaPol produced an excipient with new basic physicochemical properties that enhanced its adjuvant functionality when used for direct compression of rapid release ASA tablets.

show abstract

“…The bulk density of a powder is calculated by dividing its mass by the volume occupied by the powder (Abdullah & Geldart, 1999). Tapped bulk density, or simply tapped density, is the maximum packing density of a powder achieved under the influence of well-defined, externally applied forces (Oliveira et al, 2010).…”

Section: Characterization Of Corn Cob Xylanmentioning

confidence: 99%