Yakindra TimilsenaThe Commonwealth Scientific and Industrial Research Organisation | CSIRO · Agriculture and Food
Yakindra Timilsena
Doctor of Philosophy
Experimental Scientist in CSIRO
About
46
Publications
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Introduction
Yakindra Timilsena is a food science professional with research focus on Food Science and Food Chemistry.
Additional affiliations
July 2013 - March 2017
February 2003 - July 2013
August 2010 - June 2012
Education
July 2013 - December 2017
Publications
Publications (46)
Saponins are a diverse group of naturally occurring plant secondary metabolites present in a wide range of foods ranging from grains, pulses, and green leaves to sea creatures. They consist of a hydrophilic sugar moiety linked to a lipophilic aglycone, resulting in an amphiphilic nature and unique functional properties. Their amphiphilic structures...
Saponins are a diverse group of naturally occurring plant secondary metabolites present in a wide range of foods ranging from grains, pulses, green leaves to sea creatures. They consist of a hydrophilic sugar moiety linked to a lipophilic aglycone, resulting in an amphiphilic nature and unique functional properties. The amphiphilic structures enabl...
Millets are widely consumed cereal grains in Asia, Africa and some parts of Eastern Europe. Although, underutilized in the western world, they are rich sources of major nutrients including carbohydrates, proteins, lipids, fibres, minerals, and vitamins. Unlike wheat, barley or rye, millet is gluten-free and can be used to make nutritious and health...
Wastage of byproducts such as canola meal is a pressing environmental concern, and canola protein isolate (CPI)−chitosan (Ch) coacervates have a good potential to utilize and convert the wastes into a high value added product. Yet so far, there is very limited rheological and microstructural information to assist in proper utilization of CPI ‐Ch co...
Complex coacervation is a highly promising microencapsulation technique that is extensively employed in pharmaceutical, food, agriculture and textile industries. The process involves the interaction of oppositely charged polyelectrolytes in aqueous form. High payload and high encapsulation efficiency (up to 99%), relatively lower cost of processing...
In this study, chia seed oil (CSO) microcapsules were produced using three types of shell materials, including chia seed protein (CPI), chia seed gum (CSG) and CPI-CSG complex coacervates. Synchrotron-Fourier transform infrared (S-FTIR) microspectroscopy was used to investigate the effect of shell materials on the distribution of CSO both on the su...
Lentil is a highly nutritious legume with an ample quantity of carbohydrates and good amount of proteins, minerals, vitamins, phytochemicals and fibres. Although it has been used as staple food since ancient times, its usage has been limited in developed countries, especially due to the lower protein digestibility, presence of anti-nutritional fact...
Lactoferrin (LF) is a multifunctional protein occurring in many biological secretions including milk. It possesses iron binding/transferring, antibacterial, antiviral, antifungal, anti-inflammatory and anti-carcinogenic properties. These functional properties intimately depend on the structural integrity of LF especially its higher order conformati...
Bacteria use quorum sensing (QS) systems to communicate with each other and regulate microbial group behavior, such as the secretion of virulence factors, including biofilm formation. In order to explore safe, edible agents, the potential of star anise (SA) as an anti-QS and antibiofilm agent and its possible application in milk safety were investi...
Polyunsaturated fatty acids (PUFAs) are essential fatty acids that are abundantly available in marine fish, algae and some plant seeds. In recent years, the demand of plant-based PUFAs is increasing rapidly due to dietary and lifestyle requirements. The toxicity and environmental sustainability concerns associated with fish oils are driving the dem...
Spray dried chia seed oil (CSO) microcapsules were prepared by using chia seed protein isolate (CPI), chia seed gum (CSG) and CPI-CSG complex coacervate as shell materials. Release and digestion behaviours of CSO from above capsules were studied. The release and lipolysis of CSO from these microcapsules in simulated oral, gastric and intestinal con...
Bovine lactoferrin (LFb) powders were produced using spray drying and freeze drying. Industrially obtained fresh liquid-LFb was used as starting material. The antioxidant capacity, solubility in water, moisture sorption behaviour, the extent of denaturation and changes in the secondary structural features of spray-dried (SDLFb) and freeze-dried bov...
The complex coacervation phenomenon between canola protein isolate (CPI) and chitosan (CS) was studied. CPI was extracted in the laboratory from canola meal and used in this study. The factors affecting the yield of CPI-chitosan complex coacervates such as CPI-to-chitosan ratio, pH and strength of the electrostatic interaction (SEI) were investigat...
The drying and denaturation characteristics of native, iron depleted (apo-) and iron saturated (holo-) lactoferrin (LF) were studied in convective air drying (CD) process using single droplet drying. The extent of loss of LF due to denaturation and changes in the secondary structures during CD and isothermal water heating (IHT) were measured. The h...
Chia seed oil (CSO) microcapsules were produced by using chia seed protein isolate (CPI)-chia seed gum (CSG) complex coacervates aiming to enhance the oxidative stability of CSO. The effect of wall material composition, core-to-wall ratio and method of drying on the microencapsulation efficiency (MEE) and oxidative stability (OS) was studied The mi...
Food proteins are highly complex and versatile molecules with diverse functions. The variation in the functionality is associated with their structure. Therefore, knowledge of the structure-function relationship of the food proteins is important to understand the effect of processing factors on the physicochemical, sensory and nutritional aspects o...
Chia seed polysaccharide (CSP) was extracted from chia (Salvia hispanica) seeds, and its rheological and microstructural properties in aqueous solutions were studied. CSP solution exhibited Newtonian and shear thinning flow patterns depending on shear rate when the concentration was ≤0.06% (w/v). CSP solutions at concentrations >0.06% (w/v) exhibit...
Chia seed gum (CSG), an anionic heteropolysaccharide, was isolated from the
seed coat of chia seeds (Salvia hispanica L.).The physicochemical, thermal and
rheological properties of the purified CSG were studied. CSG was found to be
composed of a tetrasaccharide repeating unit consisting of β-D-xylose, α-Dglucose
and 4-O-mehtyl-α-D-glucuronic acid....
Fertilizers are one of the most important elements of modern agriculture. The application of fertilizers in agricultural practices has markedly increased the production of food, feed, fuel, fibre and other plant products. However, a significant portion of nutrients applied in the field is not taken up by plants and is lost through leaching, volatil...
Chia seed gum: A novel polysaccharide for food application
Yakindra Prasad Timilsenaa, b, Raju Adhikarib, Stefan Kasapisa and Benu Adhikaria
aSchool of Applied Sciences, RMIT University, Melbourne, VIC 3001, Australia
bCSIRO Manufacturing Flagship, Clayton South, VIC 3169, Australia
Abstract
The physicochemical and rheological characteristics of...
Effect of autohydrolysis and aromatic scavengers on delignification patterns were evaluated using miscanthus (MxG), empty palm fruit bunch (EFB) and typha grass residue as feedstocks. Autohydrolysis was carried out without naphthol and in the presence of naphthol followed by delignification by ethanol organosolv process. Despite their close chemica...
Various methods of pretreatments were investigated to their effect on cellulose to glucose conversion ef ciency on enzymatic hydrolysis of a tropical agro-industrial waste residue (empty palm fruit bunch, EFB). Four different kinds of combinative pretreatments (autohydrolysis with and without naphthol, dilute acid prehydrolysis, soda prehydrolysis...
A comparative study of organosolv process was performed at laboratory scale using traditional stainless steel batch reactor with parallel microwave (MW) reactors. Ethanol (with sulfuric or soda catalyst), formic acid, and performic acid organosolv processes were first optimized for the pretreatment of Typha capensis using MW reactors. The best cond...
Cumulative pretreatments methods were evaluated for delignification ability and enzymatic digestibility using miscanthus (M×G), empty palm fruit bunch (EFB) and typha grass as feedstocks. Despite their close chemical composition, the three feedstocks unveiled quite different behavior under the same condition of pretreatment. Characterization of eth...
Due to its conversion versatility to different chemicals, succinic acid is considered as a high value platform chemicals. Succinic acid and its derivatives find wide application in food industry as acidulant, flavoring agent and flavor enhancer. Being produced from renewable resources using less stringent temperature and catalytic conditions, bioba...
Questions
Questions (2)
I wish to measure the particle size distribution of some protein powders. I found some papers that they have used isobutanol to disperse the powders. Can anyone suggest what is the exact role of isobutanol in this case.
I am planning to investigate the distribution of oil inside the microcapsule using FTIR Microscopy. For this purpose, I have to slice the microcapsule (30-40 micron) to thin slices of 2 micron and fix them into CaF2 window (13 mm dia and 0.5 mm thick). I am struggling how to slice the microcapsule using ultra microtomy. All the suggestions and recommendations will be highly appreciated.
