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Open Access
Quality evaluation of germinated rice and rice products
(Department of Home Science, College of Horticulture, Vellanikkara, 2012) Neethu Sathyan, T; KAU; Suman, K T
The study entitled “Quality evaluation of germinated rice and rice products” was undertaken to evaluate the physical, cooking, biochemical, nutritional, organoleptic and keeping qualities of germinated rice. The study also aimed to evaluate the physical and keeping qualities of roasted rice flour and to assess the acceptability of the products prepared with rice flour. The rice variety Jyothi was selected for the study. After soaking for 12hours, it was germinated under laboratory conditions. The treatments were T0 – Ungerminated rice, T1- Rice- soaked for 12 hours, T2 – Rice- soaked and kept for germination for 3 days and T3 – Rice- soaked and kept for germination for 6 days. Milling recovery was found to be very low in germinated rice which in turn resulted in higher milling loss. Total milled rice and head rice recovery of germinated rice decreased significantly during storage when compared to control. Significant variation among treatments was observed with respect to thousand grain weight and thousand grain volume. To obtain optimum cooked rice, a cooking time of 22.33 to 29.33 minutes was noticed among different treatments. A positive correlation between water uptake, volume expansion and grain elongation was noticed in all the treatments. Germination decreased the amylose content thereby affecting the gel consistency. Intermediate gelatinisation temperature index was noticed in all the treatments. Moisture content of rice from four treatments varied from 10.51 to 12.67 per cent which increased significantly during storage. A significant increase in total and reducing sugar was observed as a result of starch degradation during germination. Variations were noticed in the protein, fat and fibre content among treatments. Progressive increase in the thiamine content was observed with advancement in days of germination. Compared to control, calcium, iron and phosphorus content of germinated rice were significantly low. During germination, in vitro starch digestibility of rice from different treatments increased by 5 to 17 per cent. Significant increase in in vitro mineral availability was also noticed. Bulk density of roasted rice flour from different treatments varied from 0.78 to 0.84 g per ml. Compared to control, lower water absorption index and higher water solubility index was noticed in roasted rice flour from germinated rice. The evaluation of retrogradation property in roasted rice flour from different treatments revealed that syneresis per cent increased with advancement in days of observation. Maximum syneresis was noticed in germinated rice. The products prepared using rice (cooked rice, unniappam and kozhukatta) and rice flour (iddiappam and puttu) from germinated paddy had mean scores above 6.0 for different quality attributes. Germinated rice was found to be more suitable for the preparation of unniappam and puttu. Mean scores for various quality attributes increased when the products were prepared from stored rice and rice flour. The rice and roasted rice flour were evaluated for the presence of bacteria, fungi and yeast initially and after three months of storage. Presence of bacteria was detected in both periods under study. Fungal growth was not noticed in any of the rice and rice flour samples initially but after three months of storage fungal growth was detected in roasted rice flour of T0 and T1. Yeast count was not detected in rice and rice flour initially and after three months of storage. Insect infestation was not noticed in rice and rice flour from different treatments throughout the storage period.
Open Access
Development of banana dehydrated fruit drink mix (FDM)
(Department of Home Science, College of Agriculture, Vellayani, 2011) Suma, C; KAU; Nirmala, C
The study on “Development of banana dehydrated fruit drink mix (FDM)” was carried out with the objective to develop banana based fruit drink mix and to evaluate its quality. Two varieties of banana viz., Nendran and Palayamkodan were selected for the study. Technology for Tray dried banana powder was standardized using banana as base material and blended with papaya and pine apple. Good quality FDM was obtained at a temperature of 750 C with 10 per cent maltodextrin (5 per cent at wet basis and 5 per cent at dry basis), 5 per cent liquid glucose and 1 per cent pectinase as additives. Fruit drink (FD) was prepared from the FDM made adding adequate amount of sugar and flavour. Four combinations of FDM were developed from each variety. F0 - Nendran alone F0 -Palayamkodan alone F1 - Nendran + Papaya F1-Palayamkodan+papaya F2 - Nendran + Pine apple F2 - Palayamkodan+pine apple F3 - Nendran + papaya+ pine apple F3 – Palayamkodan +papaya+pine apple Organoleptic qualities of the FDM and FD such as appearance colour, flavour, taste and over all acceptability were assessed by a panel of judges using score card. The sensory evaluation revealed that papaya blended combination scored highest value in almost all attributes. The physical characteristics such as processing loss, yield ratio, rehydration ratio, and bulk density of FDM were assessed. Processing loss was calculated in two stages, viz loss occurred on peeling and loss during drying and powdering. In both the stages maximum processing loss was observed in (F3) combination of Nendran and Palayamkodan. Minimum processing loss (on peeling) was in F1 (0.332) and while in drying and powdering (F3) combination of Nendran showed minimum loss. Yield ratio was also calculated on wet and dry basis. In both varieties, yield ratio (on wet basis) was found high in F0 and F2 combination of Palayamkodan. Moisture, TSS, total sugar, reducing sugar, acidity, fiber, total phenol, and total ash content were analyzed. In the case of moisture, TSS Nendran based FDM recorded highest value. Compared to Nendran based FDM total sugar, reducing sugar, acidity, fiber, total phenol, and total ash content was found to be high in Palayamkodan. Nutritional qualities of the developed FDM such as energy, vitamin. C, β-carotene, sodium, potassium, and calcium were also analyzed. Energy, vitamin. C, sodium and potassium showed significant difference between the varieties, treatments and also between variety and treatment, but in the case of β-carotene significant difference was not observed between variety and treatment. The developed FDM was vacuum packed and kept for shelf life studies for three months at ambient condition. Moisture and acidity was noted after storage for three months. Increase in moisture was observed and significant difference was seen between varieties, treatments and also between variety and treatment. There was a decrease in acidity was noted in stored FDM. Microbial growth was found in the stored samples. Compared to fungal growth and yeast count, bacterial count was higher. The cost of production of 1 kg of dehydrated fruit drink mix was ranged between Rs. 115 – Rs. 175. Nutrient content of one glass FD prepared from FDM was found to be good in all the nutrients except vitamin C. Cost of the fruit drink was found less than five Rs per glass and it is cost effective. Results of the findings confirm that F1 combination (banana with papaya mix) showed best in organoleptic parameters and found very acceptable compared to other combinations of FDM.
Open Access
Evaluation of cycas seed flour for product development
(Department of home science, College of horticulture, Vellanikkara, 2012) Lijitha, S; KAU; Indira, V
The study entitled “Evaluation of cycas seed flour for product development” was undertaken to evaluate the chemical constituents and shelf life of processed cycas seed flour. The study also envisaged to develop cycas seed flour supplemented products and to evaluate the nutritional and organoleptic qualities of the developed products. Cycas seeds and other ingredients required for the study were procured from the market. Cycas seeds were processed by soaking in cold water for six hours and draining the soaked water, repeatedly for seven times prior to the preparation of the flour. The cycas flour thus prepared was dried in a cabinet drier at 60 ± 5°C to a moisture content of 10-12 per cent and stored in glass bottles for a period of three months under ambient conditions. The constituents like moisture, protein, starch, total carbohydrates, crude fibre, fat, calcium, phosphorous, sodium, potassium and iron were estimated initially and after three months of storage. The antinutritional/ toxic factors in the flour such as crude alkaloids, cycasin and hydrocyanic acid were also analysed. Shelf life of cycas seed flour was also evaluated during storage. The processed cycas seed flour was found to be rich in carbohydrate and macro and micro minerals with ideal sodium - potassium ratio. The alkaloid content in processed cycas flour was found to be low. A significant decrease in the constituents like starch, total carbohydrate, crude fibre, fat and crude alkaloids was noticed during storage. A gradual increase in the microbial count was observed during storage. Insect infestation was not detected in cycas seed flour through out the period under study. Five products namely puttu, ada, pathiri, biscuit and chapathi were prepared by incorporating cycas seed flour in different proportions along with the main ingredient for respective products. The products were evaluated organoleptically for different quality attributes like appearance, colour, texture, flavour, taste and overall acceptability using score card. Rice was used as the main ingredient for the preparation of puttu, ada and pathiri. For chapathi and biscuit, wheat flour and maida were used respectively as the main ingredients. The product prepared with 100 per cent main ingredient was taken as the control. All products were prepared exclusively with cycas seed flour. The cycas flour was also incorporated into the basic ingredient at 30 to 70 per cent for the preparation of the products. Among the different products prepared by supplementing cycas seed flour, except chapathi, all products were found to be acceptable to the judges. The nutritive value of the products prepared by supplementing cycas flour was computed per serving. In puttu, ada and pathiri, the nutrients like protein, crude fibre, fat and calcium content increased with increase in the quantity of cycas seed flour. In the case of biscuit and chapathi, increased supplementation of cycas seed flour improved the crude fibre and fat content. Incorporation of cycas flour at the rate of 30 to 50 per cent with rice flour and maida was found to be ideal for the preparation of acceptable products.
Open Access
Development and quality evaluation of enriched moringa (Moringa olerifera Lam) based soup mixes (ESM)
(Department of home science, College of agriculture, Vellayani, 2012) Saranya, S; KAU; Rari John, K
The study on “Development and quality evaluation of enriched moringa (Moringa oleifera) based soup mixes (ESM)” was carried out with the objective to develop enriched moringa based enriched soup mixes and to evaluate organoleptic, functional, nutritional and shelf life quality. Moringa fruit pulp and moringa leaves were selected as base materials for the study. Two processing techniques viz drying-blending and pulping-dehydration were adopted for the development of soup mixes. In drying- blending method the moringa fruit pulp, moringa leaves, tomato and onion were dried separately at 700C for 4-8 hours, powdered, blended together with other ingredients such as soya flour, milk solid and corn flour in different proportions. In pulping- dehydration method the moringa fruit pulp, moringa leaves, tomato and onion were made into pulp using a mixer grinder and dehydrated in the dryer at 700C for 7-8 hours. The dried pulp was powdered, sieved and blended with other ingredients. The base materials (moringa pulp and moringa leaves) were added in the soup mixes with different proportions (30, 35 and 40). Four combinations of ESM were developed by using organoleptic and preference score from three combinations of the four treatments. P1 C1 - Moringa pulp alone incorporated combination (Drying and blending) P1 C2 - Moringa pulp with leaf incorporated combination (Drying and blending) P2 C1 - Moringa pulp alone incorporated combination (Pulping and dehydration) P2 C2- Moringa pulp with leaf incorporated combination (Pulping and dehydration) Organoleptic qualities of the ESM such as appearance, colour, flavour, texture and taste were assessed by a panel of ten judges using score card. The sensory evaluation revealed that moringa alone incorporated combination formulated by using drying and blending method were scored highest value in almost all attributes and the other three combinations were also good. The chemical composition such as moisture, acidity, total ash, peroxide value and fiber were analyzed in the ESM samples. In the case of moisture and acidity per cent, the P2 C2 (moringa pulp with leaf incorporated combination using pulping and dehydration method) recorded highest value. The total ash content of the ESM was equal in moringa pulp with leaf incorporated (drying and blending) and in moringa pulp alone incorporated (pulping and dehydration) combinations. The formulated ESM samples were not recorded any peroxide value; it indicates that they are good in quality. The fiber content was high in moringa pulp with leaf incorporated combinations for both the two processing techniques. Nutritional qualities of the developed ESM such as energy, protein, carbohydrate, beta carotene, vitamin C, iron, calcium, sodium and potassium were also analyzed. Energy, protein, carbohydrate, calcium and potassium showed significant difference between the treatments and also between the processing techniques and combinations. Beta carotene, vitamin C and sodium content were found higher in moringa pulp with leaf incorporated combinations. Iron content of the ESM samples did not show any significant difference between the treatments, processing techniques. The developed ESM samples were packed and kept for shelf life studies for three months at ambient condition. The moisture and acidity values were increased from first month to three months (90 days). But these values were increased only within the limit. The peroxide content was not observed up to second month of storage. There after negligible value of peroxide was recorded in the soup mixes. The microbial growth was not observed during the storage period. The microbial count was found only at the 90th day, the negligible number of bacteria was found only in the moringa pulp with leaf incorporated (pulping- dehydration) combination. The consumer preference study was also conducted among fifty consumers selected at random revealed that more people preferred the moringa pulp alone incorporated (drying- blending process) combination. And the other three combinations were also good in quality. The cost of the production of 100g of formulated ESM was ranged between Rs. 52- 59/-. Results of the findings confirm that P1 C1 (moringa alone incorporated using drying and blending process) showed best in organoleptic and consumer preference parameters. Among the two processing technique drying and blending process was good in organoleptic qualities, nutritional and chemical parameters.
Open Access
Nutritional status and nutrition cognition of adolescent girls in the coastal area of Thiruvananthapuram
(Department of home science, College of agriculture, Vellayani, 2012) Suma, N S; KAU; Geetha, P
A study entitled the “Nutritional status and nutrition cognition of adolescent girls in the coastal areas of Thiruvananthapuram”was conducted to evaluate the nutrition counseling on the knowledge and adoption of health and nutrition practices by the adolescent girls. The study was carried out in Vizhijam and Vallakkadavu in Thiruvananthapuram district. For pretest and posttest of cognition and practice, suitably structured pretested checklist was used. The dietary practice was assessed through food use frequency studies before and after the counseling programme.The data pertaining to the socio economic and personal characteristics, health and nutritional profile of the respondents were ascertained with the help of a structured and pretested interview schedule. The collected data were tabulated, analysed statistically and the results were interpreted. Most of the respondents were from nuclear family with small family size and having medium level education. Majority of the families were having low level of educational status and low monthly income. Majority of the family possessed television and radio in their homes and only 40 per cent of the respondents were members of social organisations. Participation index of the respondents in the programmes related to various organisations revealed that 50 per cent had medium level of participation index. Anthropometric measurement revealed that body mass index of 95 per cent of the respondents were found to be some forms of energy deficiency. Triceps skin fold thickness of the respondents indicated that 54 per cent of them were low fat deposit. Hemoglobin level of the respondents revealed that only 46 per cent were mildly anemic 49 per cent forms of anaemia were moderately anaemic and 4 per cent were severly anaemic. Clinical examination of the respondents reported that majority of the respondents were having nutritional deficiency symptoms. Food habits of the respondents revealed that majority of them were non vegetarians.Leftover food was consumed by all the respondents. Regarding the special foods given during different stages of life cycle revealed that majority of them were not giving any special food. Food intake of the respondents revealed that the food group which met the RDA least was pulses, green leafy vegetables, fruits, milk and milk products and sugar and jaggery. Nutrient intake of the respondents revealed that calcium, iron vitamin C and folic acid were far below the RDA stipulated. Nutritional status index of the respondents indicated medium and high nutritional status index among 86 per cent and only 17 per cent had low level of nutritional status index. The pretest scores revealed the lack of knowledge of the respondents about various aspects of general awareness on adolescent nutrition, importance of nutritious foods and health and hygiene. The counseling programme of three days duration was conducted for the benefit of the respondents to impart required information on the above areas. The counseling programme had significant effect on the gain in knowledge as well as change in adoption of practices. Correlation of selected independent variables of respondents on the cognition revealed that there was significant correlation with nutritional status index and participation index. Comparison of mean score of pretest and posttest knowledge, and practice revealed that counseling programme had significant improvement in the awareness of the respondents.
Open Access
Promoting fruit and vegetable consumption among school children through nutrition intervention programme.
(Department of Home Science, College of Agriculture, Vellayani, 2011) Seethal, K C; KAU; Beela, G K
The over arching goals of this study was to promote the fruit and vegetable consumption among school children through nutrition intervention programme. Recent literature shows that the consumption of fruits and vegetables among school children are inadequate and the trend of junk food eating habit is increasing alarmingly. A wealth of anecdotal evidence reveals that nutrition intervention programmes with gardening effect multiple domains in the lives of the subjects. The objective of the present study is to promote the fruit and vegetable consumption among the school children through nutrition intervention programme. It also investigates the impact of the nutrition intervention on the knowledge, preference and consumption towards fruits and vegetables. Tools were constructed to ascertain the demographic information’s, food consumption pattern, assessment of general health status, preference towards fruits and vegetables, knowledge towards fruits and vegetables and fruits and vegetable consumption pattern. The tools were subjected to reliability and validity tests before the study. The present study was carried out in three sessions, the first session was pre test, done, before the intervention, the second session was during the intervention and third session was the post test after the intervention. All the subjects in the present study were reported to be habitual non vegetarians. Data shows that even low cost and locally available leafy vegetable like amaranth, drumstick leave and cabbage were not consumed daily by the majority of the subjects. Consumption of roots and tubers, as well as other vegetables were also reported to be less by majority of the subjects. Frequency of fruit consumption of the subjects was also found to be low. Banana was the only fruit that was daily consumed by the subjects. . The results of the present study reveals that subjects showed preference to food rich in sugar and fat compared to that of fruits and vegetables. Majority of the subjects did not show high preference towards leafy vegetables, other vegetables as well as roots and tubers. The nutrition intervention was designed including nutrition education using multimedia tools, gardening, providing hands on activities through the actual growing and harvesting of fruits and vegetables followed by nutrition games. The frequency use of fruits and vegetables of the subjects who participated in the nutrition intervention programme significantly increased. The intervention programme had significant effect on the gain in knowledge as well as change in preference score for fruits and vegetables of the subjects who participated in the nutrition intervention. Positive associations of participation index of the subjects with knowledge score are also found. Hence it can be concluded that nutrition intervention with nutrition education, gardening and games can promote the fruit and vegetable consumption, preference and knowledge of the pre adolescent.
Open Access
Quality evaluation of organic vegetables.
(Department of Home Science, College of Agriculture, Vellayani, 2011) Agey Pappachan, T; KAU; Suma Divakar
The project entitled, ‘Quality evaluation of organic vegetables’ was carried out with the objective to study and compare the quality characteristics of organic and inorganic vegetables. Amaranth (Arun), brinjal (Haritha) and cowpea (Jyothika) were the selected vegetables. Parameters like physical characteristics, nutrient composition, antinutrient profile, shelf life, sensory qualities and pesticide residues were studied. Three types of farming practices were identified as treatments. 1) T1 - Organically cultivated vegetables (PGS certified ) 2) T2 - Organic input vegetables (PGS certified ) 3) T3 - Inorganic vegetables (from local farmers ) PGS was the certification adopted by the organic bazaar operational at Jawahar Nagar, monitored by the NGO (Thanal, Thiruvanathapuram). No significant difference was observed for the physical characteristics of the vegetables under different treatments except for the length and breadth of brinjal, it was observed to be significantly high in inorganic brinjal. Assessment of nutritional qualities revealed that calcium content was significantly high in organic amaranth, where as betacarotene content was significantly higher in inorganic amaranth compared to organic. As for cowpea there was no significant difference observed among treatments for any nutrient. In brinjal vitamin C content was significantly higher in organic brinjal compared to inorganic ones. Shelf life analysis showed that brinjal, cowpea and amaranth in all treatments kept well for similar periods without much variation. Pesticide residue analysis reported that inorganic vegetables like cowpea and brinjal contained detectable amount of malathion which was above the maximum permitted residue limit. In this study, on analysis of the results in general, physical qualities, sensory qualities, nutritive profile and shelf life parameters are seen to be on par amongst the organically and inorganically cultivated vegetables. However, the major concern is the presence of pesticide residue which has great health and environmental implication.
Open Access
Quality evaluation of bamboo seed and its products
(Department of Home Science, College of Horticulture, Vellanikkara, 2010) Shabna Kunhimon; KAU; Suman, K t
The study on “Quality evaluation of bamboo seed and its products” was undertaken to evaluate the cooking, biochemical, nutritional and organoleptic qualities of bamboo seed. The study also aimed to assess the physical qualities, organoleptic qualities and keeping qualities of bamboo seed flour stored for three months. Cooking time of 70 min was taken for obtaining optimum cooked bamboo seed. The water uptake by bamboo seed while cooking was found to be 6.90 ml/g with a volume expansion ratio of 2.16. Grain elongation ratio in bamboo seed was recorded as 0.89. The amylose content in bamboo seed was found to be 34.4 percent. The gelatinisation temperature index in bamboo seed was high. A medium gel consistency of 48.20 mm was observed in bamboo seed. The moisture content in dried and milled bamboo seed was found to be 6.70 percent. Bamboo seed contains 13.78 percent protein. The fat content in bamboo seed was one percent. Starch content in bamboo seed was 62.56 percent. Reducing sugar and total sugar in bamboo seed was 0.41 and 0.99 percent respectively. Fibre content in bamboo seed was 0.92 percent. The calcium, iron and phosphorus contents of bamboo seed were 30.60 mg, 5.94 mg and 158.60 mg respectively per 100g of bamboo seed. In vitro starch digestibility of bamboo seed was found to be 50.16 percent. In vitro availability of calcium, iron and phosphorus of bamboo seed was also estimated and it was found to be 20.20, 10.72 and 20.72 percent respectively. The organoleptic qualities of bamboo seed were evaluated by preparing three products namely cooked rice, kanji and payasam. Cooked rice, kanji and payasam had mean score above 7.00 for all parameters. Among the three products, bamboo seed payasam was found to be the most acceptable product with higher mean score for all the parameters except for texture. For texture bamboo seed kanji had the maximum score. Roasted and unroasted flours prepared from bamboo seed were evaluated for various physical qualities. The bulk density of roasted flour decreased during storage whereas in unroasted flour it remained same (0.80 g/ml). Water absorption index, water solubility index and starch content decreased during three months of storage in both roasted and unroasted bamboo seed flour. Gluten was not found in both roasted and unroasted bamboo seed flour initially and at the end of storage. The evaluation of retrogradation property in bamboo seed flour revealed that the syneresis percentage increased with advancement in days of observation. However a decrease in percentage of syneresis was noted during storage in both roasted and unroasted bamboo seed flour. Products namely puttu, idiyappam and ada were prepared using roasted flour and appam, unniyappam and murukku were prepared using unroasted bamboo seed flour. Bamboo seed puttu was identified as the most acceptable product from roasted bamboo seed flour. Among the products prepared using unroasted bamboo seed flour bamboo seed unniyappam was the most acceptable one followed by bamboo seed murukku and bamboo seed appam. The roasted and unroasted bamboo seed flour was evaluated for bacteria, fungi and yeasts initially and at the end of third month of storage. Presence of bacteria was detected in both roasted and unroasted flour and the count increased in unroasted flour during storage. Fungal count was not detected in roasted bamboo seed flour in both evaluations. But, in unroasted flour fungal count was noticed (1×103 cfu g-1) at the end of three months of storage. Presence of yeast was not detected in both roasted and unroasted flour. Insect infestation was not noticed in both roasted and unroasted bamboo seed flour.
Open Access
Quality analysis of pre-release rice cultures of KAU
(Department of Home Science, College of Agriculture, Vellayani, 2010) Sugeetha, T S; KAU; Nandini, P V
Quality analysis of pre-release rice cultures of KAU” was a study undertaken to determine the quality aspects of the pre-release rice varieties by assessing parameters like physical characteristics, cooking characteristics, nutritional composition and organoleptic qualities. The effect of parboiling on the above quality aspects was also studied. Highest value for thousand grain weight was recorded in variety OM-3. Parboiling significantly increased the thousand grain weight, hydration capacity, swelling capacity and swelling index values. Under, cooking characteristics, variety OM-2 took lesser time to cook. Highest value for volume expansion was observed in MO8-20-KR; for elongation ratio MO6-10-KR; for water uptake OM-4; for gruel loss M-108-262-1; for cooked weight MO8-20-KR and for gelatinization temperature MO8-20-KR. All the eight varieties studied, belonged to intermediate amylose group, MO8-20-KR and MO6-10-KR for amylopectin and amylose-amylopectin ratio respectively. Parboiling had a positive influence on most of the cooking characteristics of rice varieties. Consumers prefer varieties of higher nutritional quality. Compared to other varieties, MO8-20-KR had obtained higher values for nutritional characteristics such as energy content, starch content, total mineral content, calcium, phosphorus and iron. Highest value of protein content was noted in OM-2. MO-87-5 and MO-95-1 were observed to record the highest values for moisture content. MO-95-1 had obtained highest values for fibre content and thiamine content. Parboiling process positively influenced the nutritional composition of the rice varieties, exceptional cases being starch. Organoleptic evaluation of cooked rice revealed that MO8-20-KR scored the highest and therefore can be considered as the most acceptable variety with respect to the given quality attributes such as colour, appearance, flovour, doneness and taste. To conclude, it was found that culture MO8-20-KR was considered as the best among the varieties studied, followed by culture MO-87-5.

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