J. Pura Naik

• M.Sc.Ph.D
• Principal Investigator at Central Food Technological Research Institute

Ginger oleoresin was extracted from ginger rhizomes (Zingiber officinale) using acetone. The high-performance liquid chromatography analysis revealed gingerol to be the major compound of the oleoresin and accounted to 12.8 ± 0.5%. The oleoresin comprised rich fraction of 52.4 ± 0.6 mg GAE/g and exhibited 77.66 ± 0.8% antioxidant activity. They also...

Germinated fenugreek seeds were separated into endosperm, seed coat and sprouts with an overall yield of 78%. Germinated endosperm, sprouts and ungerminated endosperm contained 39.25%, 36.12% and 48.20% protein, respectively. Germinated seed coat had 55.80% insoluble and 86.96% total dietary fibre, whereas ungerminted seed coat had 31.90% and 77.10...

Fenugreek (Trigonella foenum-graecum) is used as a spice, vegetable and a medicinal plant. In the present study, fenugreek seeds were separated into husk and endosperm. The proximate composition of fenugreek seeds, husk and cotyledons showed that endosperm had the highest saponin (4.63 g/100 g) and protein (43.8 g/100 g) content. In contrast, husk...

Quality changes in flue cured large cardamom capsules and seeds were monitored under 3 storage conditions: i) 90% RH/38°C (accelerated-humid), ii) 30-40% RH/40°C (accelerated-dry), and iii) 65% RH/27°C (normal) in different packages. The samples were analysed for moisture content, volatile oil content and flavour composition every 30 days for condi...

Physical and chemical quality attributes of authentic regional cultivars (cv) of large cardamom obtained from North, South, East and West regions of Sikkim (India), Bhutan and Nepal were evaluated. The minimum, maximum and mean values for 12 Sikkim samples in respect of the major quality parameters were moisture (7.2, 14.9 and 10.5%), bulk density...

Large cardamom in LDPE pouches when fumigated with phosphine at 1.5 and 3. 0 g/m3 for 7 days, methyl bromide at 16 and 32 g/m3 for 1 day, ethyl formate at 300 g/m3 for 4 days or CO2 80-90% for 10 days, aerated for 10 days before determining the residues and subsequently stored at room temperature for 180 days was free from infestation; its overall...

The large cardamom pericarp (husk) yielded 0.18% volatile oil by Clevenger hydrodistillation method. This oil was analysed for physical parameters viz. specific gravity (0.9148), refractive index (1.4733) and optical rotation (−7.700). The volatile oil was subjected to GC–MS analysis and 37 compounds were identified, constituting > 98% of the total o...

Fresh commercial tamarind (Tamarindus indica L.) pulp samples with initial moisture content of 20% (Sample-1) and 17% (sample-2) were equilibrated to 54 and 55% RH, respectively. A moisture content of 24.0-25.5% equilibrating to 64% RH, was found safe for the storage of tamarind pulp. The product retained its overall quality in aluminium foil vacuu...

At present, the commonly used HPLC method for the analysis of caffeine and theobromine contents in aqueous cocoa extracts employs direct application of the extracts on the column. This practice gradually reduces the efficiency of the column and shortens its life. Also, this method gives inflated values due to interfering substances and difficulty i...

Studies carried out to design a suitable consumer package for 'Guntur' and 'Byadigi' varieties of chillis revealed that moisture contents of 14.00 and 11.2 %, respectively were critical for facilitating mould growth in them. But initial moisture contents of 10.45 % at 64% RH and 9.60% at 57% RH were found critical for storage of these varieties, re...

Proximate composition of Carum gracile. Lindl seeds and the physico-chemical characteristics of the volatile oils were determined. GC-MS analysis of the essential oil showed the presence of 31 constituents of which 22 compounds are reported for the first time. p-cymene (15-.06%), γ-terpinene (28.95%), cuminaldehyde (16.59%), p-menth-1, 3-dien-7-al...

Proximate composition of Apium graveolens L. seeds and the physico-chemical characteristics of the volatile oils were determined. The GC-MS analysis of the volatile oils showed the presence of 44 constituents of which limonene (50.9%), β-selinene(19.53%), 3-n-butylphthalide (6.92%) nerolidol (2.29%), α-selinene (1.63%), β-pinene (1.22%), d-carvone...

Flue-cured cardamom with an initial moisture content of 12.9% equilibrated to 67% relative humidity (RH) at 27°C. But a mixture content of 11.0% at 60% RH was found to be safe for storage of large cardamom. The product retained its overall quality in both textile and polyethylene packages at refrigerated and ambient conditions upto 180 and 90 days,...

Proximate composiion of ajowan (Trachyspermum ammi (L.) Syn. Carum copticum Hiern) seeds and the physicochemical characteristics of the volatile oil were determined. The GC-MS analysis of the volatile oil showed the presence of 17 constituents of which thymol (39.36%). γ-terpinene (30.97%), ρ-cymene (19.47%) and β-pinene (5.45%) and α-pinene (1.48%...

Extraction of fresh large cardamom pod husk with methanolic HCl yielded a mixture of two (deep pinkish red) pigments. The pigments, present in the ratio of 1:2 were separated by paper chromatography, characterized as cyanidin 3-glucoside and cyanidin 3.5-diglucoside by chemical and spectroscopic analysis and confirmed by comparison with authentic s...

At present, the commonly used HPLC method for the analysis of caffeine content in tea brews employs direct application of the samples on the column. This practice gradually reduces the efficiency of the column and shortens its life. In the modified method, the interfering tea pigments are effectively removed by passing the sample through a Sep-Pak...

Studies were carried out on the chemical composition of long pepper and the results showed that long pepper contained about 1% volatile oil, 1.25% piperine and 40% starch. As compared to black pepper, long pepper was poor in essential oil and piperine and the volatile oil was dextrorotatory, while that of black pepper was levorotatory. The GC-MS an...

The steam-distilled volatile oil of the large cardamon (Amomum subulatum Roxb.), grown in Sikkim, India, was analysed by GC-MS. It consists of monoterpenic hydrocarbons (16.3%), oxygenated monoterpenes (75.2%) and sesquiterpenes (6.3%). Its major constituents are 1,8-cineole (61.3%), α-terpineol, α- and β-pinene and allo-aromadendrene. Twenty-five...