Browsing by Author "Kumar, Narender"
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ThesisItem Open Access Effect of Clinical Mastitis on Reproductive Performance in Crossbred Cows(NDRI, Karnal, 2015) Kumar, Narender; Manimaran, A.ThesisItem Open Access Efficient estimators of mean for symmetrical population with known variance(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1996) Kumar, Narender; Bhatnagar, SThesisItem Embargo IMPACT OF HYDROCOLLOIDS ON ENGINEERING PROPERTIES OF COMPOSITE BIO-POLYMERIC FILMS(2022) Bishnoi, Ankit; Kumar, NarenderEvery year, India generates 5.6 million tons of plastic waste, 66% of which is a mixed waste of polybags and pouches used for food packaging. Packaging films made from polystyrene (PS) and polyethylene (PE) create serious environmental and ecological concerns due to their non-biodegradability. Moreover, micro plastic results in dangerous problem among the life of human, animal and marine species worldwide. Bio-polymeric packaging films have potential to replace traditional polystyrene packaging and overcome the degradation issues. Thus, the present study was designed to develop bio-polymeric films using starch, whey protein isolate (WPI), plasticizer and hydrocolloids. Starches such as corn, quinoa, and tapioca were evaluated for various concentrations (1-8 %, w/v) and used as base material. Similarly, WPI and glycerol used to enhance mechanical properties and plasticizing effect were analyzed at concentrations i.e., 0.25-2.0, % and 2.0-4.0, % respectively. After evaluating these materials, the concentrations exhibiting desirable characteristics were selected to develop a standardized film. Tapioca starch (6, %) with whey protein isolate (WPI) at 0.50, % significantly enhanced the mechanical properties like tensile strength (1.950 kgf/cm) and elongation at break (2.604%) along with puncture strength improvement to 2005.46 gf/cm. Therefore, a standardized bio-polymeric film composed of tapioca starch (6.0, %), glycerol (3.0, %) and WPI (0.50, %) was prepared using casting process with mixing time of 2.5 min at gelation temperature of 90 °C for 15 min. Furthermore, hydrocolloids such as guar gum, gum acacia, gum tragacanth and CMC were evaluated at 0.05-0.40, % concentrations to improve the functional and mechanical properties. Amongst all the hydrocolloids, gum acacia incorporated films significantly enhanced the mechanical properties viz. tensile strength (2.435kgf/cm), elongation at break (2.936, %) along with puncture strength improvement to 2669.55 gf/cm. Moreover, gum acacia incorporated films shown excellent surface morphology (SEM) finish, increased crystalinity (XRD) with improved thermal degradation (TGA) attributes, and low rate of biodegradation, good sealability and printability properties. A prototype was also developed to form bio-polymeric films on laboratory scale which had the feasibility to cast a film with 0.55 mm thickness. This development of bio-polymeric films from hydrocolloids sources could be perceived as a positive consumer benefit in near future.ThesisItem Open Access Maenetic studies on fitness traits in egg type chicken under selection vis-a-vis contemporary random mating population(College of Animal Sciences Chaudhary Charan Singh Haryana Agricultural University Hisar, 1991) Kumar, Narender; Sharma, Raj KuamrThesisItem Open Access Sludies on the effects of hypo and hyperthyroid status on reproductive perrormance of WLH birds(College of Agriculture Chaudhary Charan Singh Haryana Agricultural University Hisar, 1992) Kumar, Narender; Arneja, D. VThesisItem Open Access Studies on alternaria blight of sesame(JNKVV, 2015) Kumar, Narender; Nema, Sushma