X = (0,025 x Vnguyên liệu x 1000 x 100)/(Vchuẩn x V x m)
Trong đó: 0,025 là hàm lƣợng vitamin C trong 25ml dd chuẩn (g) Vchuẩn: là thể tích iod dùng chuẩn độ dd vitamin C chuẩn (ml) Vnguyên liệu: là thể tích iod đung chuẩn độ mẫu nguyên liệu (ml) V: là thể tích dung dịch chuẩn (ml)
Chuyên ngành Công nghệ thực phẩm vii PHỤ LỤC B – BẢNG KẾT QUẢ THỐNG KÊ CÁC THÍ NGHIỆM Phụ lục B1 - Thí nghiệm 1: Khảo sát ảnh hưởng của nhiệt độ nước xay đến hàm lƣợng các chất có hoạt tính sinh học trong sữa
Khảo sát các hoạt chất có hoạt tính sinh học trong sữa Vitamin C
One-Way ANOVA - giatri by mau Dependent variable: giatri
Factor: mau
Number of observations: 12 Number of levels: 4
ANOVA Table for giatri by mau
Source Sum of Squares Df Mean Square F-Ratio P-Value
Between groups 0.306275 3 0.102092 2.18 0.1680 Within groups 0.374337 8 0.0467921
Total (Corr.) 0.680612 11
Table of Means for giatri by mau with 95.0 percent LSD intervals Stnd. error
Mau Count Mean (pooled s) Lower limit Upper limit
30 3 2.47841 0.124889 2.27477 2.68206
50 3 2.08708 0.124889 1.88344 2.29073
70 3 2.08708 0.124889 1.88344 2.29073
80 3 2.21753 0.124889 2.01388 2.42117
Total 12 2.21753
Chuyên ngành Công nghệ thực phẩm viii Multiple Range Tests for giatri by mau
Method: 95.0 percent LSD
Mau Count Mean Homogeneous Groups
70 3 2.08708 X
50 3 2.08708 X
80 3 2.21753 X
30 3 2.47841 X
Contrast Sig. Difference +/- Limits
30 – 50 0.391328 0.407288
30 – 70 0.391328 0.407288
30 – 80 0.260885 0.407288
50 – 70 3.33333E-10 0.407288
50 – 80 -0.130443 0.407288
70 – 80 -0.130443 0.407288
* denotes a statistically significant difference.
TPC
One-Way ANOVA - mau by mau Dependent variable: mau
Factor: mau
Number of observations: 12 Number of levels: 4
ANOVA Table for mau by mau
Source Sum of Squares Df Mean Square F-Ratio P-Value
Between groups 4425.0 3 1475.0
Within groups 0.0 8 0.0
Total (Corr.) 4425.0 11
Chuyên ngành Công nghệ thực phẩm ix Table of Means for mau by mau with 95.0 percent LSD intervals
Stnd. error
Mau Count Mean (pooled s) Lower limit Upper limit
30 3 30.0 0.0 30.0 30.0
50 3 50.0 0.0 50.0 50.0
70 3 70.0 0.0 70.0 70.0
80 3 80.0 0.0 80.0 80.0
Total 12 57.5
Multiple Range Tests for mau by mau Method: 95.0 percent LSD
Mau Count Mean Homogeneous Groups
30 3 30.0 X
50 3 50.0 X
70 3 70.0 X
80 3 80.0 X
Contrast Sig. Difference +/- Limits
30 – 50 * -20.0 0.0
30 – 70 * -40.0 0.0
30 – 80 * -50.0 0.0
50 – 70 * -20.0 0.0
50 – 80 * -30.0 0.0
70 – 80 * -10.0 0.0
* denotes a statistically significant difference.
DPPH
One-Way ANOVA - giatri by mau Dependent variable: giatri
Factor: mau
Number of observations: 12 Number of levels: 4
Chuyên ngành Công nghệ thực phẩm x ANOVA Table for giatri by mau
Source Sum of Squares Df Mean Square F-Ratio P-Value
Between groups 19.6302 3 6.54339 0.59 0.6376
Within groups 88.4685 8 11.0586 Total (Corr.) 108.099 11
Table of Means for giatri by mau with 95.0 percent LSD intervals Stnd. error
mau Count Mean (pooled s) Lower limit Upper limit
30 3 61.84 1.91995 58.7093 64.9707
50 3 60.92 1.91995 57.7893 64.0507
70 3 62.4633 1.91995 59.3327 65.594
80 3 59.0733 1.91995 55.9427 62.204
Total 12 61.0742
Multiple Range Tests for giatri by mau Method: 95.0 percent LSD
Mau Count Mean Homogeneous Groups
80 3 59.0733 X
50 3 60.92 X
30 3 61.84 X
70 3 62.4633 X
Contrast Sig. Difference +/- Limits
30 – 50 0.92 6.26131
30 – 70 -0.623333 6.26131
30 – 80 2.76667 6.26131
50 – 70 -1.54333 6.26131
50 – 80 1.84667 6.26131
70 – 80 3.39 6.26131
* denotes a statistically significant difference.
Chuyên ngành Công nghệ thực phẩm xi Phụ lục B2- Thí nghiệm 2:Khảo sát ảnh hưởng của quá trình xử lý nhiệt đến các chất có hoạt tính sinh học trong sữa.
Vitamin C
One-Way ANOVA - giatri by mau Dependent variable: giatri
Factor: mau
Number of observations: 9 Number of levels: 3
ANOVA Table for giatri by mau
Source Sum of Squares Df Mean Square F-Ratio P-Value
Between groups 0.017961 2 0.0089805 0.35 0.7211
Within groups 0.155971 6 0.0259952 Total (Corr.) 0.173932 8
Table of Means for giatri by mau with 95.0 percent LSD intervals Stnd. error
mau Count Mean (pooled s) Lower limit Upper limit
115.5 3 1.39139 0.0930863 1.23033 1.55245
115.8 3 1.43487 0.0930863 1.27381 1.59593
120.3 3 1.50009 0.0930863 1.33903 1.66115
Total 9 1.44212
Multiple Range Tests for giatri by mau Method: 95.0 percent LSD
Mau Count Mean Homogeneous Groups
115.5 3 1.39139 X
115.8 3 1.43487 X
120.3 3 1.50009 X
Contrast Sig. Difference +/- Limits 115.5 - 115.8 -0.04348 0.322122 115.5 - 120.3 -0.108703 0.322122 115.8 - 120.3 -0.0652233 0.322122
* denotes a statistically significant difference.
Chuyên ngành Công nghệ thực phẩm xii TPC
One-Way ANOVA - giatri by mau Dependent variable: giatri
Factor: mau
Number of observations: 9 Number of levels: 3
ANOVA Table for giatri by mau
Source Sum of Squares Df Mean Square F-Ratio P-Value
Between groups 0.676357 2 0.338178 23.03 0.0015
Within groups 0.0880974 6 0.0146829 Total (Corr.) 0.764454 8
Table of Means for giatri by mau with 95.0 percent LSD intervals
Stnd. error
Mau Count Mean (pooled s) Lower limit Upper limit
115.5 3 4.26882 0.0699593 4.14778 4.38987
115.8 3 3.8038 0.0699593 3.68275 3.92484
120.3 3 4.45583 0.0699593 4.33478 4.57687
Total 9 4.17615
Multiple Range Tests for giatri by mau Method: 95.0 percent LSD
Mau Count Mean Homogeneous Groups
115.8 3 3.8038 X
115.5 3 4.26882 X
120.3 3 4.45583 X
Contrast Sig. Difference +/- Limits
115.5 - 115.8 * 0.465023 0.242092
115.5 - 120.3 -0.187004 0.242092
115.8 - 120.3 * -0.652027 0.242092
* denotes a statistically significant difference.
Chuyên ngành Công nghệ thực phẩm xiii DPPH
One-Way ANOVA - giatri by mau Dependent variable: giatri
Factor: mau
Number of observations: 9 Number of levels: 3
ANOVA Table for giatri by mau
Source Sum of Squares Df Mean Square F-Ratio P-Value
Between groups 178.914 2 89.457 184.19 0.0000 Within groups 2.91402 6 0.48567
Total (Corr.) 181.828 8
Table of Means for giatri by mau with 95.0 percent LSD intervals Stnd. error
mau Count Mean (pooled s) Lower limit Upper limit
115.5 3 64.8267 0.402356 64.1305 65.5229
115.8 3 59.4754 0.402356 58.7792 60.1715
120.3 3 70.396 0.402356 69.6998 71.0922
Total 9 64.8993
Multiple Range Tests for giatri by mau Method: 95.0 percent LSD
mau Count Mean Homogeneous Groups
115.8 3 59.4754 X
115.5 3 64.8267 X
120.3 3 70.396 X
Chuyên ngành Công nghệ thực phẩm xiv Contrast Sig. Difference +/- Limits
115.5 - 115.8 * 5.35135 1.39234 115.5 - 120.3 * -5.56928 1.39234 115.8 - 120.3 * -10.9206 1.39234
* denotes a statistically significant difference.
Phụ lục B2- Thí nghiệm 3: Phân tích chất lƣợng cảm quan các sản phẩm sữa từ đậu nành rau so sánh với các sản phẩm sữa đậu nành đóng chai trên thị trường.
One-Way ANOVA - giatri by mau Dependent variable: giatri
Factor: mau
Number of observations: 20 Number of levels: 10
ANOVA Table for giatri by mau
Source Sum of Squares Df Mean Square F-Ratio P-Value
Between groups 1.32677 9 0.147419 6.47 0.0037 Within groups 0.227977 10 0.0227977
Total (Corr.) 1.55474 19
Table of Means for giatri by mau with 95.0 percent LSD intervals Stnd. error
mau Count Mean (pooled s) Lower limit Upper limit dabo 2 7.16813 0.106765 6.99992 7.33634 daboNM 2 7.0596 0.106765 6.89139 7.22781 gasaco 2 6.56667 0.106765 6.39845 6.73488 kho 2 6.52975 0.106765 6.36154 6.69797 khoNM 2 6.5328 0.106765 6.36458 6.70101 namhai 2 6.84589 0.106765 6.67768 7.01411 number 2 7.21515 0.106765 7.04693 7.38336
Chuyên ngành Công nghệ thực phẩm xv soyamilk 2 7.15882 0.106765 6.99061 7.32703
tribeco 2 6.84583 0.106765 6.67762 7.01405 Multiple Range Tests for giatri by mau
Method: 95.0 percent LSD
mau Count Mean Homogeneous Groups
kho 2 6.52975 X
khoNM 2 6.5328 X
gasaco 2 6.56667 X
tuoi 2 6.75417 XX
tribeco 2 6.84583 XXX namhai 2 6.84589 XXX
daboNM 2 7.0596 XXX
soyamilk 2 7.15882 XX
dabo 2 7.16813 XX
number 2 7.21515 X
Chuyên ngành Công nghệ thực phẩm xvi Contrast Sig. Difference +/- Limits
dabo - daboNM 0.108531 0.336425 dabo - gasaco * 0.601464 0.336425 dabo - kho * 0.638378 0.336425 dabo - khoNM * 0.635334 0.336425 dabo - namhai 0.322237 0.336425 dabo - number -0.0470148 0.336425 dabo - soyamilk 0.0093131 0.336425 dabo - tribeco 0.322298 0.336425 dabo - tuoi * 0.413959 0.336425 daboNM - gasaco * 0.492933 0.336425 daboNM - kho * 0.529847 0.336425 daboNM - khoNM * 0.526802 0.336425 daboNM - namhai 0.213706 0.336425 daboNM - number -0.155546 0.336425 daboNM - soyamilk -0.0992181 0.336425 daboNM - tribeco 0.213767 0.336425 daboNM - tuoi 0.305428 0.336425 gasaco - kho 0.0369139 0.336425 gasaco - khoNM 0.0338696 0.336425 gasaco - namhai -0.279227 0.336425 gasaco - number * -0.648479 0.336425 gasaco - soyamilk * -0.592151 0.336425 gasaco - tribeco -0.279166 0.336425 gasaco - tuoi -0.187505 0.336425 kho - khoNM -0.00304433 0.336425 kho - namhai -0.316141 0.336425 kho - number * -0.685393 0.336425 kho - soyamilk * -0.629065 0.336425 kho - tribeco -0.31608 0.336425
kho - tuoi -0.224419 0.336425
khoNM - namhai -0.313097 0.336425 khoNM - number * -0.682348 0.336425 khoNM - soyamilk * -0.62602 0.336425 khoNM - tribeco -0.313036 0.336425