Search results

1 – 10 of 12
Open Access
Article
Publication date: 31 October 2022

Ouafae El Yahyaoui, Bahia Bouabid, Nabil Ait Ouaaziz, Mohamed El Bakkali, Hanae El Harche, Lalla Aicha Lrhorfi, Kamal Nakari and Rachid Bengueddour

Within the framework of the valorization of natural resources, a characterization of the biochemical composition of the edible parts of Adansonia Digitata is applied. The…

1365

Abstract

Purpose

Within the framework of the valorization of natural resources, a characterization of the biochemical composition of the edible parts of Adansonia Digitata is applied. The antibacterial effect against bacteria is also realized and compared to some synthetic antibiotics.

Design/methodology/approach

The biochemical characterization is carried out according to the norms of the French Association of Normalization, methods of Association of Official Analytical Chemists (AOAC International) and gas chromatography (GC). The antibacterial activity is tested by disk diffusion on a solid medium. Parametric tests are used to compare the differences between groups and heat maps to show the expression of the mean inhibitions according to the studied parameters. Multivariate logistic modeling is applied to study the effect of extracts and antibiotics on bacteria.

Findings

Biochemical characterization showed a variable importance of proteins, fibers and total sugars, with the presence of highly desired fatty acids such as palmitic, oleic, stearic, linoleic and a-linolenic acids. This gives the tested parts important energy values, especially in the seeds very rich in fatty acids. Methanol proved to be a better extraction solvent than dichloromethane. Antibacterial activity showed that pulp and leaves extracted with methanol had quite similar inhibitory activities against Enterococcus faecalis ATCC29212 and that this effect was better than some antibiotics. Multivariate analysis showed that the leaves had a similar effect to antibiotics, and a significant effect against Staphylococcus aureus ATCC29213.

Originality/value

This important activity and the attractive nutritional value of this plant could justify its extensive use in the traditional pharmacopoeia.

Details

Arab Gulf Journal of Scientific Research, vol. 41 no. 1
Type: Research Article
ISSN: 1985-9899

Keywords

Content available
Article
Publication date: 29 May 2007

199

Abstract

Details

Nutrition & Food Science, vol. 37 no. 3
Type: Research Article
ISSN: 0034-6659

Open Access
Article
Publication date: 27 April 2020

Christian Mauricio Cobos, Octavio Fenollar, Juan López Martinez, Santiago Ferrandiz and Luis Garzón

This paper aims to describe the influence of maleinized linseed oil (MLO), when used as a lubricant, on the thermal and rheological properties of PLA/MWCNTs (polylactic acid

1244

Abstract

Purpose

This paper aims to describe the influence of maleinized linseed oil (MLO), when used as a lubricant, on the thermal and rheological properties of PLA/MWCNTs (polylactic acid/multi-walled carbon nanotubes) and PLA/HNT (halloysite nanotubes) nanocomposites, as a reference for application in 3D printing processes.

Design/methodology/approach

Nanocomposites were obtained by melting in a twin-screw extruder, mixing PLA with MWCNTs and HNTs in different percentages of 0.5, 0.75 and 1 Wt.% for subsequent mixing by the same process with 5 phr MLO, for application in additive manufacturing, as analyzed by means of differential scanning calorimetry (DSC), capillary rheometry, melt flow rate (MFL) and field emission scanning electron microscopy (FESEM).

Findings

The results obtained for thermal characterization by using DSC indicate the non-variation of glass transition temperature Tg = 62 ± 2°C and a melting temperature (Tm) around 170°C. Crystallization temperature dropped by approximately 12°C, which should be kept in mind during the transformation processes. The values obtained by capillary rheometry indicate that the material’s viscosity is reduced by the influence of the MLO plasticizer’s lubricant effect on the PLA’s molecular structure. The melt flow index values confirm a rise of approximately 46% in the flow index and back up the capillary rheometry results. The values obtained were as follows: PLA/0.5 Wt.% MWCNT/MLO 5 phr 54.07, PLA/0.75 Wt.% MWCNT/MLO 5 phr 53.46, PLA/1 Wt.% MWCNT/MLO 5 phr 51.84y PLA/0.5 Wt.% HNT/MLO 5 phr 61.8, PLA/0.75 Wt.% HNT/MLO 5 phr 68.3 and PLA/1 Wt.% HNT/MLO 5 phr 71.2 g/10 min. Apart from the nanocharge distribution, the information obtained from the FESEM shows the existence of a cluster, which could have been avoided by more energetic stirring during the nanocompound manufacturing process.

Social implications

This paper presents an analysis of the insertion of plasticizer in nanocomposites for the application in additive manufacturing processes in fusion deposition modelling (FDM) system.

Originality/value

This is a novel original research work.

Details

Rapid Prototyping Journal, vol. 26 no. 6
Type: Research Article
ISSN: 1355-2546

Keywords

Content available
Article
Publication date: 1 October 1998

David Margaroni

91

Abstract

Details

Industrial Lubrication and Tribology, vol. 50 no. 5
Type: Research Article
ISSN: 0036-8792

Keywords

Content available
Article
Publication date: 1 December 1998

46

Abstract

Details

Pigment & Resin Technology, vol. 27 no. 6
Type: Research Article
ISSN: 0369-9420

Content available
Article
Publication date: 1 February 1998

64

Abstract

Details

Pigment & Resin Technology, vol. 27 no. 1
Type: Research Article
ISSN: 0369-9420

Content available
Article
Publication date: 1 August 1998

44

Abstract

Details

Pigment & Resin Technology, vol. 27 no. 4
Type: Research Article
ISSN: 0369-9420

Content available
Article
Publication date: 1 June 1998

41

Abstract

Details

Pigment & Resin Technology, vol. 27 no. 3
Type: Research Article
ISSN: 0369-9420

Content available
Article
Publication date: 1 April 1998

26

Abstract

Details

Pigment & Resin Technology, vol. 27 no. 2
Type: Research Article
ISSN: 0369-9420

Content available
Article
Publication date: 1 October 1998

55

Abstract

Details

Pigment & Resin Technology, vol. 27 no. 5
Type: Research Article
ISSN: 0369-9420

Access

Only content I have access to

Year

Content type

1 – 10 of 12