TY  - BOOK
AU  - Geethanjali U 
AU  - Beela G K (Guide)
TI  - Consumer acceptance and nutritional composition of laser bio speckle screened mango (Mangifera indica)
U1  - 640 
PY  - 2022///
CY  - Vellayani
PB  - Department of Community Science, College of Agriculture
KW  - Community Science
N1  - MSc
N2  - The present study entitled “consumer acceptance and nutritional composition 
of laser biospeckle screened mango (Mangifera indica)” was carried out at College of 
Agriculture, Vellayani, Thiruvananthapuram during the period of 2019-2021. The 
objective of the study was assessment of the consumer acceptance and nutritional 
composition of laser biospeckle screened mango. Thus two mango varieties were 
selected and screened with biospeckle laser for the study.
A pilot survey was conducted on awareness and attitude of consumers 
regarding biospeckle laser technology. The survey was conducted on 100 consumers 
from Thiruvananthapuram district. A questionnaire of 20 questions was developed to 
elicit consumer acceptance. Demographic characteristics of respondents like Gender, 
education, occupation, income and residence were collected. Education and income of 
the respondents showed their influence on consumer’s response. Among the 
respondents 57% strongly agreed that there is a need for development of novel food 
technologies in food industry. Sixty per cent of the respondents were unaware of 
biospeckle laser technology. Thirty three per cent were sceptic about health effects of 
laser screened foods. 
Among the respondents 44% opinionated that biospeckle screened foods are 
slightly high priced than others in the market and 34% opinionated that they are safe 
but showed some concern. Major portion (57%) of the respondents opinionated that 
biospeckle laser technology does not effect nutritional quality of foods screened. The 
percentage of respondents agreed for commercial practice of biospeckle laser was 
37%. Whereas 54% of the respondents preferred to have safety certification marks on 
the label of food screened with biospeckle laser and 48% preferred to buy biospeckle 
screened foods by the companies they trust.
Two mango varieties namely banganapalli and neelum at mature but not fully 
ripened stage (15-16 weeks after fruit set) were selected for the study. The fruits were 
divided into control (T1) and experimental (T2) groups. Ten replications were selected 
for each group. The experimental group of mangoes were subjected to bio speckle 
laser screening using He-Ne laser of 632.8 nm wavelength at photonics laboratory, 
CUSAT. Morphological and physical characters of the fruits like Length, weight, 
circumference, volume and specific gravity were observed. Analysis of nutritional 
composition for both experimental and control groups was carried out. The nutritional 
composition comprises moisture content, protein content, carbohydrate content, fibre 
content , acidity content, total sugar content, TSS content, Minerals ( Potassium, 
magnesium, iron), Vitamin (Vitamin A, Vitamin C), total polyphenols, Total 
carotenoids content.
The total moisture content of T1 & T2 of neelum was 71.95% & 72.60% 
whereas that of banganapalli was 79.61% & 80.27%. The total moisture content of T1 
& T2 of neelum was 71.95% & 72.60% whereas that of banganapalli was 79.61% & 
80.27%. The total protein content of T1 & T2 of neelum was 0.69% & 0.59% whereas 
that of banganapalli was 0.48% & 0.51%. The total carbohydrate content of T1 & T2 
of neelum was 21.12% & 19.66% whereas that of banganapalli was 15.31% & 
15.24%. The total fiber content of T1 & T2 of neelum was 0.51% & 0.47% whereas 
that of banganapalli was 0.69% & 0.60%. The TSS content of T1 & T2 of neelum was 
17.68% & 18.95% whereas that of banganapalli was17.89% & 18.04%. The total 
potassium content of T1 & T2 of neelum was 0.22% & 2.09% whereas that of 
banganapalli was 0.13% & 0.12%.
The total sugars content of T1 & T2 of neelum was 18.95% & 19.55% whereas 
that of banganapalli was 17.69% & 17.84%. The total acidity content of T1 & T2 of 
neelum was 0.48% & 0.42% whereas that of banganapalli was 0.13% & 0.12%.The 
total iron content of T1 & T2 of neelum was 2.77% & 2.68% whereas that of 
banganapalli was 4.78% & 4.79%. The total vitamin C content of T1 & T2 of neelum 
was 78.01% & 76.82% whereas that of banganapalli was 61.60% & 60.25%. The 
statistical analysis revealed that there was no significant difference between the 
nutritional composition between control and experimental groups of banganapalli and 
neelum mango varieties.
Organoleptic evaluation of both the mangoes was carried by a sensory panel of 
25 members selected from the respondents of consumer acceptance survey. The 
organoleptic characters evaluated were Texture, color, aroma, sweetness, bitterrness, 
astringency, juiciness, firmness. From the organoleptic evaluation it was found that 
there was no difference in organoleptic characters of both experimental and control 
group of neelum and banganapalli mango varieties. The acceptance was same for the 
experimental and control groups by panel members. This shows that there was no 
difference observed in organoleptic characteristics of mangoes screened with 
biospeckle laser technology.
This study on consumer acceptance and nutritional composition of laser 
biospeckle screened mango concludes that there was no significant difference 
observed in nutriotional composition and organoleptic characteristics of bio speckle 
screened foods and therefore can be considered safe for consumption and also 
provides enough scientific evidence to reduce the scepticism of consumers on 
biospeckle screened foods
ER  -