Food Science

The amino acid composition of the yolk and albumen of the egg of domestic duck was determined on a dry weight basis. The total essential amino acid ranged from (g/100 g crude protein, cp): 40.9-41.3 or from 43.5-47.8 % respectively of the total amino acid. The amino acid scores showed lysine ranged from 1.26 -1.27 (on provisional essential amino acid scoring pattern) and 1.19-1.21 (on suggested requirement of the essential amino acid of a pre-school child). The predicted protein efficiency ratio was 2.33-2.52, the essential amino acid index range was 1.31-1.32 and the calculated isoelectric point range was 4.90-5.53. The Leu/Ile ratio range was 1.80-1.38. The correlation coefficient (rxy) was positive and significant at r = 0.05 for the amino acids, amino acid scores (on suggested requirement of the essential amino acid of a pre-school child) and the isoelectric point in the two samples. Domestic duck yolk and albumen amino acids were compared with yolk and albumen of domestic guinea fowl and domestic chicken eggs.

The research was conducted to find out the effect of implementation of HACCP in a baking industry. The quality attributes such as microbial count and compositional analysis were done to find out the positive effect. High energy fortified biscuits was prepared as influenced by different levels of soy flour protein and wheat flour gluten content of the biscuit recipes in a food industry before food safety implementation. Packaging study was also conducted by high density polyethylene up to 90 days of storage showing moisture content just above Bangladesh Standards and Testing Institute (BSTI) requirement at 90 days for the samples S1, S2 and S3. Moisture%, Protein %, fat %, sucrose % and iron content remained acceptable considering BSTI requirements. Sample S1 containing highest soy flour protein and wheat flour gluten estimated highest protein %, fat% and iron content compared to sample S¬2 and S3. Microbial qualities of biscuits found acceptable at initial storage regardless of microbial quality of raw materials. Sensory qualities of biscuits were also evaluated which showed the sample S3 , treated with lowest amount of soy flour protein and wheat flour gluten, was the most preferred biscuit with respect to all the quality attributes. Though the high energy fortified biscuit has compact source of energy, packaging condition was not sufficient to hold moisture content as BSTI standard level during 90 days of storage.

The following experimental procedures were carried out on the samples using standard analytical methods: fat, fatty acids, phytosterols and phospholipids analyses, quality assurance determination and the calculation of uncertainty interval percentage (UIP) were undertaken. Statistical evaluations were: linear correlation coefficient (rxy), coefficient of determination (rxy2), linear regression coefficient (Rxy), coefficient of alienation (CA) and index of forecasting efficiency (IFE). The results were: crude fat range (g/100 g): 47.6 (cooked seeds) – 49.6 (roasted seeds) followed by calculated fatty acid of 45.5-47.4; SFA range (% total fat): 19.0-23.4; MUFA, 54.8-57.9; DUFA, 20.1-23.5; TUFA, 0.50-1.70; total unsaturated fatty acid (TUFA) was raw seeds (81.0 %) > roasted seeds (79.9 %) > cooked seeds (76.6 %); PUFA range was 21.8-24.1 %; PUFA/SFA was 0.93-1.21; 2n-6.3n-3 range was 13.7-43.6. Among the phospholipids, lecithin was highest among the samples with values of 725-1168 mg/100 g or 36.0-57.2 %. Among the phytosterols, sitosterol was highest in each sample with a range of 81.1-111 mg/100 g. Significant relationship existed among the following parameters at r = 0.01: fatty acids level for raw seeds/roasted seeds (Rs/Rt.s), raw/cooked seeds (Rs/Cs) and Rt.s/Cs; energy contribution by the fatty acids fraction: Rs/Rt.s, Rs/Cs and Rt.s /Cs as well as in phytosterols level.

The rapidly growing and changing food demands by urban dwellers has resulted in the need for cheaper and convenience foods. Street vended foods have shown epidemiological links with illness. Concerns have also been raised about these foods with respect to their potential for food poisoning outbreaks. The study sought to assess aspects of hygiene practices such as food preparation area, environment of food vendors, personal hygiene, handling and storage of food. A standardized questionnaire was used to collect data on the current status of food hygiene and sanitation practiced by street food vendors in Accra. Results indicated that out of the 50 respondents, 66% were in the age range of 26 to 30 years, of which 76% were females. Most of the vendors (54%) were senior high school graduates. Majority (76%) of the respondents were stationary vendors. Of the total respondents interviewed, 36% have not had any form of formal training in catering, 64% of the vendors prepare food at home and send to the premises to be sold, and 80% of the surroundings were clean. Fifty-eight percent (58%) dispose of refuse twice daily. Most of the respondents (86%) had short and clean nails. Forty percent (40%) of the vendors serve the food in polyethylene bags. Unsold food is stored by 56% of the respondents for sale the next day. Reheating (50%) and refrigeration (44%) are methods used by respondents to preserve unsold food. A large number (70%) of the vendors use sachet water to serve their customers as a source of drinking water. This study indicates that majority of food vendors in Accra exhibited good food hygiene practices. However there is a need for the vendors to be given regular education on hygienic practices to avoid food contamination and food poisoning.

Moringa is known to contain elements that are essential to life. Major roles played by elements include enzyme activation, nerve impulse conduction, oxygen transport, immune functions. The two major groups of elements are major and minor elements (trace elements). Major elements such as Na, Ca, K,P, Mg and trace elements such as Fe, V, Zn, Cr, Cu, Cd, Co , Mn, Pb, Al, Br were determined using both Neutron Activation Analysis(N.A.A) and Atomic Absorption Spectrometer(A.A.S). Further research is required to carry out the effectiveness of Moringa preparations in reducing the risks associated with diseases such as diabetes, hypertension.

The aim of this study was to evaluate the nutients content and antioxidant capacity of fresh immature fruits of twelve varieties from Okra (Abelmoschus esculentus L.). Protein and utilizable carbohydrate contents were evaluated by the method of Gornall (1949) and Dubois (1956), respectively. Atomic absorption spectrophotometry was used to determine the quantities of minerals present in the samples. The antioxidant activity was measured using FRAP test.The highest protein content is observed in the variety V3 (36.055 ± 0.017 g/100 g). That in utilizable carbohydrate is observed in the variety V19 (9.2418 ± 0.014 g/ 100 g). The zinc, iron and copper contents are relatively low. Varieties V19 (60mg/kg), V52 (40 mg/kg) and V42 (14 mg/kg) showed the high contents of zinc, iron and copper, respectively. Evaluation of antioxidant activity in vitro of the extracts, from the different varieties of okra, by the reduction’s method of the ferric ion (FRAP), showed interesting activities. The highest ferric ion reduction capacity was observed with the V42 variety (62.93 mmol EAA / g). All the results obtained revealed that immature fruits of okra’s varieties V5, V16, V52 and V42 presented the higher nutritional and antioxidant potentials among all the varieties and could thus be recommended to children, women and older people for their diet.

The bark of the cinnamon tree has a long history both as a spice and as a medicine. It has been reported that the healing abilities of cinnamon come from three basic types of components in the essential oils found in its bark. This present study was to assess the microbial contamination that might arise as a result of recommended drying methods and the efficacy of extracts from different dried cinnamon parts on selected microorganisms. Oven dried samples recorded no microflora due to the high temperature in the oven destroying all vegetative cells in the samples. The root bark samples had a higher microbial count than the stem barks. None of the extracts from both the dried stem and root barks was effective at inhibiting the growth of E. coli. Cold water and ethanol extracts of the stem bark did not have an inhibitory effect on S. aureus. Hot water extracts of the shade dried samples did not show any inhibitory effect on Pseudomonas aeruginosa. For the inhibition of P. aeruginosa, oven dried samples showed a higher zone of inhibition than samples dried under shade.

Bread is one of the major products of baked foods and is consumed worldwide. Autoclave of pumpkin seed help to increase the nutrient content of the bread. The objective of this study was to optimize the refined wheat flour, autoclave pumpkin seed powder and butter with respect to bread-making quality. The optimal Design was employed with the following variables of weight loss, porosity and specific volume of the bread. Models developed adequately described the relationships and were confirmed by validation studies. Refined wheat flour showed the greatest effect on models, which effect impaired porosity and specific volume of autoclave pumpkin seed bread. The optimum set of the independent variables was obtained graphically in order to obtain the desired levels of 100g for refined wheat flour, 10g for autoclave pumpkin seed and 6g for butter. Organoleptic evaluation of autoclave pumpkin seed bread shows that variation 4 with 100g refined wheat flour; 10g autoclave pumpkin seed and 6 g of butter had obtained high score for overall acceptability.

Elaeagnus angustifolia has wide range of distribution in the country and its oil has many food and health benefits. Its oil use for therapy of some disease included Dental diseases, diarrhea, stomach ulcers and prevention of bleeding. The purpose of this study was to investigate the physicochemical properties of the seed oil. Therefore Elaeagnus were collected of the surrounding gardens Semnan. Its core was separated. After drying, it was chopped by the mill, oil extraction was obtained by Soxhlet. Some traits were examined such as Peroxide value, acid and iodine value. 5% oil was obtained of Elaeagnus Angustifolia. The oil had high in linoleic acid and oleic acid its oil like sunflower oil and contains essential fatty acids omega-6 and omega-9 fatty acid. It also has good resistance to oxidation temperature. The mean iodine value was 120.73, oxidation stability 5:51 h, blue color 0.78 percent, red 2.79 percent, yellow 47.6%, peroxide 12.31 mill equivalents peroxide per kg of oil, non-soap compounds 5.17% , sterols 1283 mg/100gr oil, Tocopherol 94.3 mg/ 100gr oil, iron 0.62 ppm, copper 0.0366 ppm, Phospholipid 268.3 mg per gram, respectively.

Obesity has been pointed as a major issue plaguing in the World. Currently the Indian community has more of overweight / obese, people with excess body fat, abdominal adiposity, increased subcutaneous and intra-abdominal fat, and deposition of fat in ectopic sites. Fat is still the number one nutritional concern for most people because the continuous consumption of fat may lead to certain major health disorders such as cardiovascular diseases, obesity, hypertension, some types of cancer, high blood cholesterol etc. Evidence suggests that lowering total energy intake along with a reduction in total fat intake can have a substantial impact on body weight and risk of chronic diseases. Thus, the fat replacers have opened the door for a new generation of reduced fat foods that have the taste and texture of the high fat foods that consumers enjoy, without unnecessary calories, cholesterol or fat. By considering the current issue prevailing in India, effort was taken to prepare a modified rice starch to replace fat in certain food products without affecting the taste, texture and flavor. Though 100 percent replacement of fat is impossible it is feasible to reduce the fat content to an acceptable level with the help of modified rice starch.