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Article
Publication date: 1 September 2004

R. Remya, S. Syamkumar and B. Sasikumar

An efficient protocol for the isolation of high molecular weight DNA from dry powdered samples of turmeric including market samples is described which will help in PCR…

2134

Abstract

An efficient protocol for the isolation of high molecular weight DNA from dry powdered samples of turmeric including market samples is described which will help in PCR based detection of adulteration in marketed turmeric powders. The method involves a modified CTAB (3 per cent) procedure with 2 M NaCl, 0.3 per cent β‐mercaptoethanol coupled with purification of DNA in 30 per cent polyethylene glycol (8000). The yield of the DNA obtained from the samples varied from 2 to 4 μg/g tissue. The DNA obtained from the five different samples were consistently amplifiable (RAPD primers).

Details

British Food Journal, vol. 106 no. 9
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 15 July 2022

Wiah Wardiningsih, Sandra Efendi, Rr. Wiwiek Mulyani, Totong Totong, Ryan Rudy and Samuel Pradana

This study aims to characterize the properties of natural cellulose fiber from the pseudo-stems of the curcuma zedoaria plant.

Abstract

Purpose

This study aims to characterize the properties of natural cellulose fiber from the pseudo-stems of the curcuma zedoaria plant.

Design/methodology/approach

The fiber was extracted using the biological retting process (cold-water retting). The intrinsic fiber properties obtained were used to evaluate the possibility of using fiber for textile applications.

Findings

The average length of a curcuma zedoaria fiber was 34.77 cm with a fineness value of 6.72 Tex. A bundle of curcuma zedoaria fibers was comprised of many elementary fibers. Curcuma zedoaria had an irregular cross-section, with the lumen having a varied oval shape. Curcuma zedoaria fibers had tenacity and elongation value of 3.32 gf/denier and 6.95%, respectively. Curcuma zedoaria fibers had a coefficient of friction value of 0.46. Curcuma zedoaria fibers belong to a hygroscopic fiber type with a moisture regain value of 10.29%.

Originality/value

Extraction and Characterization of Curcuma zedoaria Pseudo-stems Fibers for Textile Application.

Details

Research Journal of Textile and Apparel, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1560-6074

Keywords

Article
Publication date: 2 February 2022

Mehran Nouri, Sara Sohaei, Mohammed Nader Shalaby, Sanaz Mehrabani, Atena Ramezani and Shiva Faghih

This paper aims to assess the impact of curcumin supplementation body mass index and glycemic indices in women with polycystic ovary syndrome (PCOS).

Abstract

Purpose

This paper aims to assess the impact of curcumin supplementation body mass index and glycemic indices in women with polycystic ovary syndrome (PCOS).

Design/methodology/approach

A systematic search of the literature was conducted in PubMed, Scopus and ISI web of science to identify all randomized controlled trials (RCTs) published from the earliest record up to February 2021. The authors used a random-effects model to estimate pooled effect sizes.

Findings

A total of four potentially related clinical trials met the inclusion criteria which included a total of 198 participants. Random-effects meta-analysis showed significant effects of curcumin on fasting blood sugar (FBS) (−3.62 mg/dl, 95% CI [−5.65, −1.58], p-value < 0.001, I2 = 0.0%), insulin level (−1.67 µU/mL, 95% CI [−3.06, −0.28], p-value = 0.018, I2 = 0.0%) and homeostasis model of assessment insulin resistance (HOMA-IR) (−0.42, 95% CI [−0.76, −0.09], p-value < 0.01, I2 = 0.0%). No evidence of publication bias was discovered in the meta-analyses.

Originality/value

Present systematic review and meta-analysis of RCTs showed beneficial effects of curcumin consumption on FBS, insulin level and HOMA-IR in patients with PCOS. However, further large-scale studies are needed to confirm these results.

Details

Nutrition & Food Science , vol. 52 no. 7
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 19 July 2011

Chong Hueh Zan, Asmah Rahmat, Abdah, Akim, Norjahan Banu Mohd. Alitheen, Fauziah Othman and Gwendoline Ee Cheng Lian

The purpose of this paper is to screen cytotoxic activities of commonly used culinary plants in Malaysia, Pandanus amaryllifolius (daun pandan), Curcuma longa (turmeric…

830

Abstract

Purpose

The purpose of this paper is to screen cytotoxic activities of commonly used culinary plants in Malaysia, Pandanus amaryllifolius (daun pandan), Curcuma longa (turmeric leaves) and Etlingera elatior (kantan flower) against selected cancer cell lines.

Design/methodology/approach

Plant samples were extracted exhaustively with ethanol and concentrated under rotary evaporator. Cytotoxic evaluation was carried out with plant extracts (0‐100 μg/ml) using 72‐h MTT assay.

Findings

Exposure of plant extracts reduced cell viability of HepG2 (hepatocellular carcinoma), HT‐29 (colon carcinoma), MDA‐MB‐231 (non‐hormone‐dependent breast cancer), MCF‐7 (hormone‐dependent breast cancer) and HeLa (cervical cancer); 50 percent inhibitory values (IC50) were obtained for MDA‐MB‐231, HepG2, HT‐29. Extracts within the concentrations of 10‐100 μg/ml were found not to be effective against proliferation of MCF‐7 and HeLa.

Originality/value

The paper shows how culinary plants – daun pandan, turmeric leaves and kantan flower displayed selective cytotoxic effects towards liver, colon and breast cancer in vitro.

Details

Nutrition & Food Science, vol. 41 no. 4
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 1 May 2011

Shahid Adeel, Ijaz A. Bhatti, K. EL-Nagar, M. Mohboob Alam and Nagia Ali

The rhizomes of Curcuma longa L. which contains curcumin, the main coloring component that imparts a yellow color onto cotton fabric, has been selected for study in this…

105

Abstract

The rhizomes of Curcuma longa L. which contains curcumin, the main coloring component that imparts a yellow color onto cotton fabric, has been selected for study in this paper. The extracts are obtained by using different concentrations of irradiated turmeric powder. In order to improve colour fastness properties, pre and post- mordanting are applied by using alum and iron as mordants. The dyed samples are subjected to a CIE Lab system with a spectra flash spectrophotometer for the evaluation of L* (lighter/darker), a* (redder/greener) and b* (yellower/bluer) values.

Finally, ISO standard methods are employed to study colour fastness to light, washing and rubbing (dry and wet) in order to observe the influence of UV radiation on the dyeing behaviour of turmeric. It is observed that UV radiation not only enhances the color strength of dye on irradiated cotton fabric using low concentrations of dye, but also improves the color fastness properties of pre-irradiated cotton fabric by using pre-irradiated turmeric powder with a low concentration of mordant.

Details

Research Journal of Textile and Apparel, vol. 15 no. 2
Type: Research Article
ISSN: 1560-6074

Keywords

Article
Publication date: 18 June 2019

Rashidi Othman, Mohd Akram Abdurasid, Noraini Mahmad and Nurrulhidayah Ahmad Fadzillah

The purpose of this paper is to extract, characterise and quantify curcumin from selected Zingiberaceae of “kunyit” or turmeric (Curcuma longa), “temu lawak” or Javanese…

Abstract

Purpose

The purpose of this paper is to extract, characterise and quantify curcumin from selected Zingiberaceae of “kunyit” or turmeric (Curcuma longa), “temu lawak” or Javanese turmeric (Curcuma xanthorrhiza), “temu pauh” (Curcuma mangga), “lempoyang” (Zingiber zerumbet) and “bonglai” (Zingiber cassumunar) using alkaline and chemical-based extraction method for antimicrobial and antioxidant activities.

Design/methodology/approach

Through the alkaline-based extraction method, all parts of rhizome samples were freeze-dried for 72 h before grounded into a fine powder and kept at −20°C. The powdered sample (0.1 g) was weighed and placed in a 50 mL tube. About 20 mL of 2 M NaOH solution was added into the tube. The solution was allowed to stand for 30 min. Then, 20 mL of ethyl acetate was added into the tube. The solution was mixed well then centrifuged at 13,500 rpm for 3 min. The upper layer was collected using a pipette. The process was repeated until the upper layer became almost colourless. The collected ethyl acetate solution was concentrated using a rotary evaporator to remove the ethyl acetate from the extracted compound. The concentrated curcumin was placed in a universal bottle, which was then dried from the remaining ethyl acetate using nitrogen drying process. The dried curcumin was then stored inside the freezer at −20ºC. The antimicrobial activities were using agar diffusion method against bacterial and fungi, while the antioxidant activity was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging assay.

Findings

All the samples successfully showed a single peak (curcumin) that gained from the high-performance liquid chromatography (HPLC) chromatogram analysis (at 425 nm) using the alkaline-based extraction method and the highest curcumin content was in turmeric (12.95 ± 1.07mg/g DW). At 10.0 mg/mL curcumin concentration, the best antibacterial activity was against on methicillin-resistant staphylococcus aureus (MRSA) with 7.50 ± 0.71 mm inhibition zone, while the best antifungal activity was against on Aspergillus niger with 8.00 ± 0.41 mm inhibition zone. The DPPH antioxidant test resulted in the highest inhibition (110.41 per cent) was at 0.25 mg/mL curcumin concentration.

Originality/value

Through HPLC analysis, all samples successfully showed a single peak of curcumin at 425 nm. The total carotenoid determination from turmeric revealed that the samples content was substantially higher using alkaline-based extraction (18.40 ± 0.07 mg/g DW) compared to chemical-based extraction (9.42 ± 0.20 mg/g ± SD).

Details

Pigment & Resin Technology, vol. 48 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 1 November 2011

E.M. El-khatib and N.F. Ali

Glycidyl triethyl ammonium chloride (GTEAC) was used to chemically modify the primary amine groups (-NH2) in wool fabrics to acquire new properties. The properties of…

Abstract

Glycidyl triethyl ammonium chloride (GTEAC) was used to chemically modify the primary amine groups (-NH2) in wool fabrics to acquire new properties. The properties of treated wool fabrics were studied such as wettability, whiteness, nitrogen content, dyeability, fastness and antimicrobial properties. Modified cationic wool fabrics enhanced hydrophilicity, dyeing properties and biocidal activity. The treatment led to improvement in dyeability, fastness, wettability, whiteness and antimicrobial activity. Dyeing was performed with natural dye obtained from Tumeric at 85°C. Curcumin is an active ingredient in turmeric (Curcuma longa L.). Curcumin, a common natural dye used for fabrics and food colorations, was used as an antimicrobial finish due to its bactericidal properties on dyed textiles. A common dyeing process could provide wool fabrics with color as well as antimicrobial properties. The antimicrobial activity of wool fabrics treated with (GTEAC) and dyed with curcumin was studied. The durability of antimicrobial activity of curcumin dyed wool fabrics to laundering was also examined.

Details

Research Journal of Textile and Apparel, vol. 15 no. 4
Type: Research Article
ISSN: 1560-6074

Keywords

Open Access
Article
Publication date: 5 November 2020

Dorji Nidup, Somboon Kietinun, Sunyarn Niempoog and Kusuma Sriyakul

Rtsa-byugs, a massage oil from Bhutan, is a traditional herbal formula known for its anti-inflammatory properties and used in osteoarthritis treatment. This study…

Abstract

Purpose

Rtsa-byugs, a massage oil from Bhutan, is a traditional herbal formula known for its anti-inflammatory properties and used in osteoarthritis treatment. This study investigates the efficacy of rtsa-byugs vs diclofenacgel in relieving knee pain in osteoarthritis patients.

Design/methodology/approach

A single-blind, randomized controlled trial was conducted amongst osteoarthritis knee patients at an orthopedic outpatient department of Thammasat University Hospital. Participants were randomly allocated to the rtsa-byugs (N = 31) or the Diclofenac gel (N = 31) group. Primary outcomes were assessed by the knee injury and osteoarthritis outcome scores (KOOS), visual analog scale (VAS) and goniometer at day 0, 1, 3, 7.

Findings

62 participants completed the study. The result of the KOOS scores demonstrated a significant improvement of symptoms at the end of the study in both treatment groups. Improvement of symptoms, pain, daily life living, sport and recreational score and quality of life assessment showed a significant difference from baseline (p < 0.001) within both groups. The quality of life score for the rtsa-byugs group increased significantly on day 3 and 7. The VAS score in both groups decreased with a significant difference from baseline to day 7. The mean value of extension of angle measurement was decreased in day 7, and the mean of flexion score increased in both groups when compared with the baseline.

Research limitations/implications

The duration of the study was very limited and included a small sample consisting of men and women.

Originality/value

Rtsa-byugs is safe and effective in relieving pain from osteoarthritis of the knee and can be used as an alternative treatment for knee osteoarthritis.

Details

Journal of Health Research, vol. 35 no. 5
Type: Research Article
ISSN: 0857-4421

Keywords

Article
Publication date: 15 March 2013

Z.H.Z. Abidin, N.N. Naziron, K.M. Nasir, M.S. Rusli, S.V. Lee, M.Z. Kufian, S.R. Majid, B. Vengadaesvaran, A.K. Arof, R.M. Taha and R. Yahya

The purpose of this work is to investigate the influence of curcumin dye natural colorant on adhesion, mechanical, thermal and electrochemical properties of blend poly…

Abstract

Purpose

The purpose of this work is to investigate the influence of curcumin dye natural colorant on adhesion, mechanical, thermal and electrochemical properties of blend poly (methyl methacrylate) (PMMA) – acrylic polyol.

Design/methodology/approach

Extracted curcumin yellow dye colorant from Curcuma Demostica was mixed with PMMA‐acrylic polyol blended polymer in the volume ratios of 9:1, 8:2 and 7:3. The mixtures were applied on pre‐treated cold‐roll mild steel panels. All of the paint coating samples were subjected to potential time measurement (PTM), rapid impact deformation, differential scanning calorimetry (DSC), cross hatch and Fourier transform infrared spectroscopy (FTIR) tests.

Findings

The addition of curcumin dye colorant was able to improve the adhesion, flexibilities and resistance against electrolytes penetration of the blended poly (methyl methacrylate) (PMMA) – acrylic polyol polymer paint system. Cross hatch test studies showed that high amount of curcumin dye colorant (AP30 paint system) had the lowest peel‐off coating area from the substrate. The FTIR test had confirmed the high concentration of hydroxyl group in the AP30 sample. The hydroxyl group was able to promote hydrogen bonding between coating substrate interface. The AP30 sample had the highest coating flexibilities when tested with rapid impact test. This was due to the lowest glass transition value Tg which indicated lowest cross linking density in the coating molecules structure. In the PTM test, AP30 paint system had shown the highest rate electrolytes penetration within the AP sample.

Research limitations/implications

The composition of curcumin dye colorant in the polymer blend is limited from 10 percent to 30 percent pigment volume concentration. Increasing the amount of lawsone pigment will result inhomogeneous mixtures.

Originality/value

The AP paint system is suitable for interior applications. This paint system has to be mixed with suitable additive materials to improve its performance for exterior purpose.

Details

Pigment & Resin Technology, vol. 42 no. 2
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 12 March 2018

Nurul Hazwani Abdul Latif, Muhammad Taher, Juliana Md Jaffri, Mohamad Shahreen Amri, Muhammad Badri Abdul Kudos, Wan Mohd Azizi Wan Sulaiman and Deny Susanti

Various studies suggest that some of natural agents create a specific action of hypocholesterolemic effect. Considering this fact, the aim of this paper is to work on…

Abstract

Purpose

Various studies suggest that some of natural agents create a specific action of hypocholesterolemic effect. Considering this fact, the aim of this paper is to work on describing selected natural agents that may reduce cholesterol concentrations by different mechanism of actions.

Design/methodology/approach

The advantages, phytochemical components and the mechanisms of the agents were reviewed and supported from the findings of the in vitro, double-blind and clinical studies from published journals, books and articles. The journals used in this review were published between 1987 and 2016, and are available from PubMed, ScienceDirect and Google Scholar.

Findings

Plant stanols and sterols, turmeric, fenugreek, avocado, tomato, artichoke, red yeast rice and garlic showed a positive effect in maintaining cholesterol levels by specific mechanisms or actions. These agents each had a specific action in creating a hypocholesterolemic effect either by inhibition of the enzyme significant to the synthesis process, disturbing the absorption of cholesterol, conversion of cholesterol to other related forms and through the reduction of the oxidative stress.

Research limitations/implications

However, this field still needs more studies as, currently, there is not any detailed information regarding the main active ingredients responsible for the mechanism to reduce cholesterol levels in humans.

Originality/value

This paper enlightens the authors’ understanding of some natural agents that have the potential to be used in controlling cholesterol.

Details

Nutrition & Food Science, vol. 48 no. 2
Type: Research Article
ISSN: 0034-6659

Keywords

1 – 10 of 46