ICAR Indian Institute of natural resins and gums

Namkum, India

ICAR Indian Institute of natural resins and gums

Namkum, India
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Binsi P.K.,ICAR Central Institute of Fisheries Technology | Nayak N.,ICAR Central Institute of Fisheries Technology | Sarkar P.C.,ICAR Indian Institute of Natural Resins and Gums | Joshy C.G.,ICAR Central Institute of Fisheries Technology | And 2 more authors.
Journal of Food Science and Technology | Year: 2017

In this study, the gelation and thermal characteristics of microwave extracted fish scale gelatin blended with natural gums such as gum arabic (AG), xanthan gum (XG), guar gum (GG), and tragacanth gum (TG) was evaluated. The nature of interaction and behavior of gelatin in presence of various gums was confirmed by particle size analysis, viscosity profile, FT-IR analysis and turbidity measurements. DSC data revealed that addition of AG, TG and GG remarkably improved the thermal stability of fish gelatin gel. The composite gels of TG, AG, and XG exhibited higher hardness and bloom strength values as compared to pure fish gelatin implying its textural synergy. Based on qualitative descriptive analysis, TG was found to be superior in improving the stability of fish gelatin gel, closely followed by AG. The results suggest that addition of these gums can reduce syneresis and retard melting of gelatin gels at ambient temperature, which are otherwise soft and thermally unstable. © 2017, Association of Food Scientists & Technologists (India).


Thombare N.,ICAR Indian Institute of Natural Resins and Gums | Jha U.,Birla Institute of Technology | Mishra S.,Birla Institute of Technology | Siddiqui M.Z.,ICAR Indian Institute of Natural Resins and Gums
Carbohydrate Polymers | Year: 2017

With the aim to explore new adsorbents for water purification, guar gum based hydrogels were synthesized by cross-linking with borax at different percentage. The cross-linking was confirmed through characterization by FTIR spectroscopy, SEM morphology, thermal studies and water absorption capacity. To examine the adsorption/absorption performance of different grades of hydrogels, their flocculation efficiency was studied in kaolin suspension at different pH by standard jar test procedure. The flocculation efficiency of the test materials was compared with the commercially used coagulant, alum and also residues of Al and K left in the treated water were comparatively studied. The synthesized hydrogels were also tested for their efficiency of removing Aniline Blue dye by UV–vis spectrophotometer study. The best grade hydrogel outperformed alum, at extremely low concentration and also showed dye removing efficiency up to 94%. The single step synthesized green products thus exhibited great potential as water purifying agents. © 2017 Elsevier Ltd


Binsi P.K.,ICAR Central Institute of Fisheries Technology CIFT | Nayak N.,ICAR Central Institute of Fisheries Technology CIFT | Sarkar P.C.,ICAR Indian Institute of Natural Resins and Gums | Muhamed Ashraf P.,ICAR Central Institute of Fisheries Technology CIFT | And 2 more authors.
Food Chemistry | Year: 2017

The synergistic efficacy of gum arabic and sage polyphenols in stabilising capsule wall and protecting fish oil encapsulates from heat induced disruption and oxidative deterioration during spray drying was assessed. The emulsions prepared with sodium caseinate as wall polymer, gum arabic as wall co-polymer and sage extract as wall stabiliser was spray dried using a single fluid nozzle. Fish oil encapsulates stabilised with gum arabic and sage extract (SOE) exhibited significantly higher encapsulation efficiency compared to encapsulates containing gum arabic alone (FOE). Scanning electron microscopic and atomic force microscopic images revealed uniform encapsulates with good sphericity and smooth surface for SOE, compared to FOE powder. In vitro oil release of microencapsulates indicated negligible oil release in buffered saline whereas more than 80% of the oil loaded in encapsulates were released in simulated GI fluids. The encapsulates containing sage extract showed a lower rate of lipid oxidation during storage. © 2016 Elsevier Ltd


Raja P.,Indian Central Arid Zone Research Institute | Raja P.,ICAR Indian Institute of Soil and Water Conservation | Singh N.,Wadia Institute of Himalayan Geology | Srinivas C.V.,Indira Gandhi Center for Atomic Research | And 5 more authors.
Climate Dynamics | Year: 2017

Regions of strong land–atmosphere coupling will be more susceptible to the hydrological impacts in the intensifying hydrological cycle. In this study, micrometeorological experiments were performed to examine the land–atmosphere coupling strength over a heat low region (Thar desert, NW India), known to influence the Indian summer monsoon (ISM). Within the vortex of Thar desert heat low, energy–water exchange and coupling behavior were studied for 4 consecutive years (2011–2014) based on sub-hourly measurements of radiative–convective flux, state parameters and sub-surface thermal profiles using lead-lag analysis between various E–W balance components. Results indicated a strong (0.11–0.35) but variable monsoon season (July–September) land–atmosphere coupling events. Coupling strength declined with time, becomes negative beyond 10-day lag. Evapotranspiration (LE) influences rainfall at the monthly time-scale (20–40 days). Highly correlated monthly rainfall and LE anomalies (r = 0.55, P < 0.001) suggested a large precipitation memory linked to the local land surface state. Sensible heating (SH) during March and April are more strongly (r = 0.6–0.7) correlated to ISM rainfall than heating during May or June (r = 0.16–0.36). Analyses show strong and weak couplings among net radiation (Rn)–vapour pressure deficit (VPD), LE–VPD and Rn–LE switching between energy-limited to water-limited conditions. Consistently, +ve and −ve residual energy [(dE) = (Rn − G) − (SH + LE)] were associated with regional wet and dry spells respectively with a lead of 10–40 days. Dew deposition (18.8–37.9 mm) was found an important component in the annual surface water balance. Strong association of variation of LE and rainfall was found during monsoon at local-scale and with regional-scale LE (MERRA 2D) but with a lag which was more prominent at local-scale than at regional-scale. Higher pre-monsoon LE at local-scale as compared to low and monotonous variation in regional-scale LE led to hypothesize that excess energy and water vapour brought through advection caused by pre-monsoon rainfall might have been recycled through rainfall to compensate for early part of monsoon rainfall at local-scale. However, long-term measurements and isotope analysis would be able to strengthen this hypothesis. This study would fill the key gaps in the global flux studies and improve understanding on local E–W exchange pathways, responses and feedbacks. © 2017 Springer-Verlag GmbH Germany


PubMed | ICAR Indian Institute of natural resins and gums and ICAR Central Institute of Fisheries Technology
Type: Journal Article | Journal: Journal of food science and technology | Year: 2016

The effect of edible coating using gum arabic on biochemical, microbiological, textural and sensory characteristics of fresh gutted mackerel stored at 4C was investigated. The results were further compared against the samples packed under vacuum (VP) and conventional polyethylene pouches (CP). Coating with gum arabic (GC) markedly retarded lipid oxidation process in gutted mackerel compared to VP and CP samples. Moreover, VP and CP samples showed higher degree of textural deterioration compared to GC samples. Microbiologically, the shelf life of chilled gutted Indian mackerel was estimated to be 7-8, 17 and 19-20days for CP, GC and VP samples, respectively. The sensory analysis scores confirmed the efficacy of gum coating in retarding the spoilage process during chilled storage. The current study identifies the potential of edible coating with gum arabic to improve the overall quality of Indian mackerel and extend its storage life during chilled storage.


PubMed | ICAR Indian Institute of Natural Resins and Gums and ICAR Central Institute of Fisheries Technology CIFT
Type: | Journal: Food chemistry | Year: 2016

The synergistic efficacy of gum arabic and sage polyphenols in stabilising capsule wall and protecting fish oil encapsulates from heat induced disruption and oxidative deterioration during spray drying was assessed. The emulsions prepared with sodium caseinate as wall polymer, gum arabic as wall co-polymer and sage extract as wall stabiliser was spray dried using a single fluid nozzle. Fish oil encapsulates stabilised with gum arabic and sage extract (SOE) exhibited significantly higher encapsulation efficiency compared to encapsulates containing gum arabic alone (FOE). Scanning electron microscopic and atomic force microscopic images revealed uniform encapsulates with good sphericity and smooth surface for SOE, compared to FOE powder. In vitro oil release of microencapsulates indicated negligible oil release in buffered saline whereas more than 80% of the oil loaded in encapsulates were released in simulated GI fluids. The encapsulates containing sage extract showed a lower rate of lipid oxidation during storage.


Ghosal S.,ICAR Indian Institute of Natural Resins and Gums | Meena S.C.,ICAR Indian Institute of Natural Resins and Gums | Ghosh J.,ICAR Indian Institute of Natural Resins and Gums | Thamilarasi K.,Lac Production Division
Indian Journal of Agricultural Sciences | Year: 2016

An experiment was carried out during 2011-12 to 2013-14 at the Institute Research Farm, Ranchi (23°23'N longitude, 85°23' E latitude and 650 m above MSL) to study the effects of different primary nutrients, liming and micronutrients (boron, molybdenum, zinc and copper) on the growth of 5 year old established plantation ofsemialata (Flemingia semialata) and residual effect on soil fertility. The experiment consisted of 12 treatments. These included recommended doses of zinc, copper, boron, molybdenum, liming @ 125 g/m2, two doses of potassium (30 and 60 g/plant), two doses of nitrogen (25 and 50 g/plant), combination of N-P-K (50, 25 and 50 g/plant) and two control treatments (lac inoculated and lac un-inoculated) replicated thrice and was conducted in Randomized Block Design. Effect of year was separated by analyzing variance due to years adopting factorial mode. Treatments like liming, nitrogen application (50 g) and NPK combination (50-25-30 g) excelled by producing 1.47, 1.42 and 1.48 kg fresh biomass/plant as against 1.23 kg in control (inoculated). Boron, zinc, potassium and copper application occupied a position in the middle order (1.28 to 1.36 kg). Plant mortality significantly went down to merely 5% on third year as against 30% in first year. It indicated that cumulative effect of imposition of treatment in present rate on the experimental plot has benefited the plant stand significantly. Copper level increased to 3 ppm in copper applied treatments which was approximately three times more than that of normal soil. Similarly, zinc content was raised to 2.52 ppm on the plots where zinc was applied. Potassium application at higher rate has increased the soil potassium level 23%, suggests that loss of potassium from this soil is very negligible. Study also revealed that only four parameters varied markedly due to liming. These were CaCO3 content, potassium and manganese level and soil pH. Lower rate of liming (14 lime/ha/year) proved to be efficient and remunerative; it could raise the pH 0.33 unit.


PubMed | ICAR Indian Institute of Natural Resins and Gums and ICAR Central Institute of Fisheries Technology
Type: | Journal: Food chemistry | Year: 2016

Fish roes are considered as nutritionally valuable for their high content of essential fatty acids and amino acids. However, roe lipids undergo considerable extent of oxidation during processing and storage, imparting objectionable bitter taste and rancid flavour to roe products. Hence, the objective of the study was to reconstitute the roe mass and microencapsulate lipid fraction, so that small oil droplets are entrapped within a dry matrix of roe proteins during spray drying. Prior to spray drying, the emulsion was stabilised with gum arabic as it also act as a co-wall polymer. The microscopic images indicated presence of larger aggregates in unstabilised powder (RC) compared to well-separated particles in stabilised powder (RG). Incorporation of gum arabic retarded rancidity development during storage. In vitro digestive pattern of roe powder indicated higher amount of oil release in RG. These observations highlight the potential of converting the soft textured carp roe mass into stable fish roe powder with superior storage stability and functionality.


Thombare N.,ICAR Indian Institute of Natural Resins and Gums | Jha U.,Birla Institute of Technology | Mishra S.,Birla Institute of Technology | Siddiqui M.Z.,ICAR Indian Institute of Natural Resins and Gums
International Journal of Biological Macromolecules | Year: 2016

Guar gum is the powdered endosperm of the seeds of the Cyamopsis tetragonolobus which is a leguminous crop. The endosperm contains a complex polysaccharide called galactomannan, which is a polymer of d-galactose and d-mannose. This hydroxyl group rich polymer when added to water forms hydrogen bonding imparting significant viscosity and thickening to the solution. Due to its thickening, emulsifying, binding and gelling properties, quick solubility in cold water, wide pH stability, film forming ability and biodegradability, it finds applications in large number of industries. In last few decades a lot of research has been done on guar gum to fit it into particular application, as such or by its structural modifications. This review gives an overview of the nature, chemistry and properties of guar gum and discusses recent developments in its modifications and applications in major industries like hydraulic fracturing, explosives, food, agriculture, textile, paper, cosmetics, bioremediation, drug delivery, medical and pharmaceuticals. This article would help researchers engaged in biopolymer area and other end-users who want to begin research in natural polysaccharides. © 2016 Elsevier B.V.


PubMed | ICAR Indian Institute of Natural Resins and Gums and Birla Institute of Technology
Type: | Journal: International journal of biological macromolecules | Year: 2016

Guar gum is the powdered endosperm of the seeds of the Cyamopsis tetragonolobus which is a leguminous crop. The endosperm contains a complex polysaccharide called galactomannan, which is a polymer of d-galactose and d-mannose. This hydroxyl group rich polymer when added to water forms hydrogen bonding imparting significant viscosity and thickening to the solution. Due to its thickening, emulsifying, binding and gelling properties, quick solubility in cold water, wide pH stability, film forming ability and biodegradability, it finds applications in large number of industries. In last few decades a lot of research has been done on guar gum to fit it into particular application, as such or by its structural modifications. This review gives an overview of the nature, chemistry and properties of guar gum and discusses recent developments in its modifications and applications in major industries like hydraulic fracturing, explosives, food, agriculture, textile, paper, cosmetics, bioremediation, drug delivery, medical and pharmaceuticals. This article would help researchers engaged in biopolymer area and other end-users who want to begin research in natural polysaccharides.

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