Volume 2, No. 7 July 2024

p-ISSN 3032-3037| e-ISSN 3031-5786

 

 


The Effect of Using Kale Vegetable Extracts, Kailan Vegetables, and Mustard Greens Vegetables in Bakpao Making on The Physical and Sensory Quality

 

Savina Putri Wahyudi1*, Cucu Cahyana2, Annis Kandriasari3

Universitas Negeri Jakarta, Jakarta, Indonesia1*23

Email: putri200014@gmail.com

 

Abstract

The research aimed to analyze the effect of using kale, kailan and mustard green vegetable extracts in making bakpao on physical and sensory quality. This research was conducted at the Bread and Patisserie Processing Laboratory, Culinary Education Study Program, Faculty of Engineering, Jakarta State University. The method used in this research is an experimental method which begins with a physical test by measuring the volume of the bakpao and the height of the bakpao, which is followed by a sensory test on 45 trained panelists, namely students of the Culinary Education Study Program who have passed the advanced bread processing course. The results of the research show that the results of hypothesis testing using the Kruskal Wallis test with a significance level of α (0.05) show that there is no effect of using extracts of kale, kailan vegetables and green mustard greens in making bakpao on sensory quality in all aspects. The results of physical measurements of volume and height with the greatest values ​​were obtained by kailan vegetable extract with a volume of 103.33 cm3 and an average height of 3.97 cm. The conclusion of the results of this research is based on the results of physical tests that the bakpao using kailan vegetables have advantages in terms of volume and height, so they are the recommended formula.

 

Keywords: Bakpao, green vegetable extract, physical quality, sensory quality

 

Introduction

Buns are dishes made from wheat flour, fermented, given various fillings and cooked by steaming (Anggriawan, 2022). Buns are one of the types of bread that is quite popular in Indonesia and is popular from children to adults. This is shown by the very rapid development of the bun business. The most popular buns are buns that have characteristics in terms of taste, aroma, color and texture (Utami & Putri, 2020). The original bun has the characteristics of a sweet, flavorful bun, white in color, smooth texture, symmetrical shape and fluffy volume.

Buns have quality and quality that continues to evolve both in terms of shape and color variation. This shows that in addition to white buns, it turns out that the color on the buns can be made with food coloring so as to make the appearance of the buns more attractive (Hashempour-Baltork & Farshi, 2022). Some of the artificial dyes used in the community are tartrazine and sunset yellow to produce yellow color; allura, erythrosine, and amaranth to produce red; and brilliant blue for blue (Winarno & Octaria, 2020). The use of artificial dyes can be harmful to health if added in excessive amounts in food or routinely consumed over a long period of time.

Traditionally, people have used natural ingredients as natural dyes in their dishes, even plants also contain many benefits (Alegbe & Uthman, 2024; Bekele et al., 2024). Natural dyes can be obtained by extraction, which is the process of extracting soluble chemical content so that it is separated from materials that cannot be dissolved with liquid solvents (Saputra, 2021). The green color possessed by chlorophyll has long been used as a natural dye in various food and non-food products (Indrasti et al., 2019).

 Green vegetables are a potential that can be used as raw materials or additives in food products as an effort to increase the nutritional content and functional properties of these ingredients (Letiora et al., 2020). Kale vegetables are one of the vegetables that receive attention because of their nutritional content profile (Raychaudhuri et al., 2023; Subedi et al., 2023). Kailan vegetables are a plant with a myriad of benefits (Huang et al., 2024). Mustard greens are a type of vegetable that is used by its young leaves as a vegetable food and has various benefits and uses that contain a lot of protein, fat, carbohydrates, and vitamins (Ngantung et al., 2018).

Kale vegetable extracts, kailan vegetables, and mustard greens added to the processed bun products will affect the yield of bun products. This is because there will be a change in the physical properties of buns in general. Changes in this type of vegetable will cause changes in external and internal aspects. This study was conducted to analyze the effect of the use of kale vegetable extracts, kailan vegetables, and mustard greens in the manufacture of buns on physical and sensory quality.

 

Research Methods

This study uses an experimental method for the manufacture of bun products with the use of green vegetable extracts. The samples from this study are three types of buns with the use of kale vegetable extracts, kailan vegetables, and mustard greens. The preliminary stage of the research is to determine a good control product formula. The next stage is carried out by testing the product formula using green vegetable extracts. The research formula can be seen in Table 1.

The data collection technique in the sensory quality test was carried out randomly (random sampling) by giving a different code to each sample using an organoleptic test (hedonic test) conducted by a rather trained panelist of 45 students of the Culinary Arts study program, Faculty of Engineering, State University of Jakarta. The aspects tested on buns with the use of green vegetable extracts include external aspects (volume, skin color, skin surface character, skin character, shape) and internal aspects (bun aroma, green vegetable aroma, crumb pores, crumb color, taste, crumb texture, chewing quality). Analysis of sensory quality test data using the Kruskal Wallis test, if the results obtained are significantly different, the test is continued with Tuckey's test to determine the best product.

Physical quality test data was collected using the grain method (jewawut seeds) to determine the volume of buns and the ruler method to determine the height of buns, while the analysis of physical quality test data used the ANOVA test and the analysis data was presented in descriptive form. Meanwhile, the stages of making bun products include the selection of raw materials, weighing raw materials, mixing, resting time, cutting/dividing, rounding, intermediate proofing, moulding, panning, final proofing, streaming, depanning, cooling, packaging.

Table 1. Formula Bakpao

Ingredient Name

Sum

Percent (%)

Gram (g)

Low-protein flour

100

250

Full cream milk powder

4

10

Ragi instan

2

5

Gula pasir

20

50

Salt

0.6

1.5

Baking powder

0.6

1.5

Egg whites

12

30

Cold water

43.2

108

Shortening

10

25

 

Results and Discussion

The results of bun products using green vegetable extracts can be seen in Figure 1. The research aspects in the sensory quality test include volume aspect, skin color aspect, skin surface character aspect, skin character aspect, shape aspect, bun aroma aspect, green vegetable aroma aspect, crumb pore aspect, crumb color aspect, taste aspect, crumb texture aspect, and chewing quality aspect. The research aspects of the physical quality test are the volume aspect and the high aspect aspect. 

Control Products

Kale Vegetable Bun

Kailan Vegetable Bun

Mustard Vegetable Bun

 

 

Figure 1.

Bun Results

 

 

Table 2. Results of measuring the volume and height of buns

Buns

Result

Volume

Tall

Cubic centimeters (cm3)

Centimeter (cm)

Kale vegetable extract

86,67

3,80

Kailan vegetable extract

103,33

4,0

Mustard greens extract

101,67

3,9

 

Volume Physical Quality Test

Based on the results of measurements using the grain method, the average value of the volume of buns using kale vegetable extract was 86.67 cm3. The average value of the volume of buns using kailan vegetable extract was 103.33 cm3 and the buns using mustard greens extract was 101.67 cm3. The results of the ANOVA calculation were obtained f calculation of 10.11 with a significant degree α= 0.05; Treatment-Free Degree (DBP) 2; and the error-free degree (dbg) of 6 is obtained in the f table of = 5.14. So it can be concluded that f calculates > f table which means that H0 is rejected and H1 is accepted. Therefore, there is a significant influence on the use of kale vegetable extracts, kailan vegetables, and mustard greens in the manufacture of buns on the physical quality in the volume aspect, so it is necessary to have a follow-up test in the form of a Duncan test  to find out the real difference in each treatment. Based on the results of the Duncan  test on the measurement of bun volume, there was no significant difference in buns with the use of kailan and mustard greens vegetable extracts. Meanwhile, buns with the use of kale extract have different notations so it can be concluded that there is a significant difference in the volume of buns.

 

 

 

 

 

 

 

 

 

 


Figure 2.

Volume Value Graph

 

The expanding volume is obtained from glutenin which absorbs water which functions as an increase in fluffiness in the process of making buns (Rizqullah & Elida, 2022).

 

High Physical Quality Test

Based on the results of measurements with the ruler method, the average value of bun height using kale vegetable extract was 3.80 cm. The average height of buns using kailan vegetable extract was 4 cm and buns using mustard vegetable extract was 3.9 cm. The results of the ANOVA calculation were obtained f calculation 0.86 with a significant degree α= 0.05; Treatment-Free Degree (DBP) 2; and the error-free degree (dbg) of 6 is obtained in the f table of = 5.14. Therefore, it can be concluded that f calculates < f table which means that H0 is accepted and H1 is rejected so that it can be concluded that there is no significant influence on the use of kale vegetable extracts, kailan vegetables, and mustard greens in the manufacture of buns on the physical quality in the high aspect.

 

 

 

 

 

 

 

 

 

 


Figure 3.

High Value Graph

 

The volume that occurs in bread products is the ability of bread to increase in size (height) before and after the baking or steaming process (Rizqullah & Elida, 2022). In making buns, the use of kale vegetable extract, kailan vegetable extract, and high-yield mustard vegetable extract did not show significant differences, so it can be interpreted that the height of the three products is good.

 

Sensory Quality Test

Volume

The results of the panelists' sensory assessment of buns from the volume aspect can be seen in the following figure:

 

 

 

 

 

 

 

 

 

 


Figure 4.

Volume Value Graph

 

Based on the results of the average calculation, it was obtained that buns using kale vegetable extract had an average value of 4.5 with the medium volume assessment category, buns using kailan vegetable extract had an average value of 4.5 with the medium volume assessment category, and buns using mustard greens vegetable extract had an average value of 4.4 with the medium volume assessment category. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in making buns on the physical and sensory quality in the volume aspect where x2 calculate = 0.09 < x2 Table = 5.99 at a significant degree α = 0.05 with degrees of freedom df = 3 - 1 = 2. During fermentation, yeast enzymes play an important role i.e. yeast reacts With starch and sugar to produce carbon dioxide gas, the development of this gas causes the dough to expand and causes the dough to become lighter and larger (Faridah & Pramudia, 2019).

 

Skin Tone

The results of the panelists' sensory assessment of buns from the aspect of bun skin color can be seen in the following image:

 

 

 

 

 

 

 

 

 

 


Figure 5.

Skin Color Value Graph

 

Based on the results of the average calculation, it was obtained that buns using kale vegetable extract had an average value of 4.6 with the yellowish light green skin color assessment category, kailan vegetable extract buns had an average value of 4.8 with the yellowish light green skin color assessment category, and buns using mustard greens vegetable extract had an average value of 4.7 with the yellowish light green skin color assessment category. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract on the physical and sensory quality of the skin color aspect where x2 count = 0.54 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. Skin color is also obtained from the hot temperature during the steaming process with a steaming time of 10-15 minutes (Rizqullah & Elida, 2022). Chlorophyll at the base of the leaf will be different from chlorophyll at the tip, middle, and edges of the leaf, the difference in the amount of chlorophyll will show a difference in leaf color (Dharmadewi, 2020).

Skin Surface Character

The results of the panelists' sensory assessment of buns from the aspect of the character of the skin surface can be seen in the following image:

 

 

 

 

 

 

 

 

 

 


Figure 6.

Skin Surface Character Value Chart

 

Based on the results of the average calculation, it was obtained that the buns using kale vegetable extract had an average value of 4.3 with the category of uneven smooth skin surface character assessment, the buns using kailan vegetable extract had an average value of 4.5 with the category of uneven smooth skin surface character assessment, and the buns using mustard vegetable extract had an average value of 4.6 with the category of uneven smooth skin surface character assessment. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the physical and sensory quality of the skin surface character where x2 count = 2.18 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. The use of too large a fire during the steaming process will make the bun deflated and the surface of the skin will wrinkle when removed (Rizqullah & Elida, 2022).

Skin Character

The results of the panelists' sensory assessment of buns from the aspect of skin character can be seen in the following image:

 

 

 

 

 

 

 

 

 

 


Figure 7.

Skin Character Value Graph

 

Based on the results of the average calculation, it was obtained that buns using kale vegetable extract had an average value of 3.9 with the category of assessment of the character of the rather soft skin, buns using kailan vegetable extract had an average value of 4.2 with the category of soft skin character assessment, and buns using mustard greens had an average value of 4.3 with the category of assessment of soft skin character. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the physical and sensory quality of the skin character where x2 count = 3.02 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. The use of fat in making bread as shortening can improve physical structures such as softness (Doğan & Karapınar Keserli, 2024; Lafuente et al., 2024; Vanapalli et al., 2023).

Shape

The results of the panelists' sensory assessment of buns from the aspect of shape can be seen in the following figure:

 

 

 

 

 

 

 

 

 

 


Figure 8.

Graph Value Shapes

 

Based on the results of the average calculation, it was obtained that the buns using kale vegetable extract had an average value of 3.8 with a somewhat symmetrical shape assessment category, the buns using kailan vegetable extract had an average value of 4.2 with the symmetrical shape assessment category and the buns using mustard vegetable extract had an average value of 3.9 with a somewhat symmetrical shape assessment category. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the physical and sensory qualities in the shape aspect where x2 count = 2.29 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. The shape of the bun is influenced when shaping the dough by hand and the same amount of dough when dividing the dough (Rizqullah & Elida, 2022).

Aroma Bakpao

The results of the panelists' sensory assessment of buns from the aspect of bun aroma can be seen in the following figure:

 

 

 

 

 

 

 

 

 

 


Figure 9.

Bun Aroma Value Chart

 

Based on the results of the average calculation, it was obtained that the buns using kale vegetable extract had an average value of 3.9, with the assessment category close to the typical flavor of buns, the buns using kailan vegetable extract had an average value of 3.8 with the category of flavored assessment typical of buns and the buns using mustard vegetable extract had an average value of 4.3 with the category of flavored assessment typical of buns. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the physical and sensory quality in the aspect of bun aroma where x2 count = 3.74 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. The aroma produced in bread varies depending on the additional ingredients provided, so the bread is expected to have a good aroma, such as buns that have a distinctive fermentation aroma (Rizqullah & Elida, 2022).

Green Vegetable Aroma

The results of the panelists' sensory assessment of buns from the aspect of green vegetable aroma can be seen in the following figure:

 

 

 

 

 

 

 

 

 


Figure 10.

Green Vegetable Aroma Value Graph

 

Based on the results of the average calculation, it was obtained that buns using kale vegetable extract had an average value of 3.7 with the assessment category of slightly flavored langu green vegetables, buns using kailan vegetable extract had an average value of 4.2 with the assessment category of not slightly flavorful langu green vegetables and buns using mustard vegetable extract had an average value of 3.5 with the assessment category of somewhat flavorful langu green vegetables. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the physical and sensory quality of the aroma aspect of green vegetables where x2 count = 4.29 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. The aroma of green vegetables itself is produced from the use of green vegetable extracts themselves, in the manufacturing process blanching techniques have been carried out  on vegetables that are expected not to have too much langu aroma from the vegetables. Green vegetables contain the enzyme lipoxidase which, if the cooking process is not perfect, can cause an unpleasant odor (Faridah & Pramudia, 2019).

Crumb Pores

The results of the panelists' sensory assessment of buns from the aspect of crumb pores can be seen in the following figure:

 

 

 

 

 

 

 

 

 

 


Figure 11.

Crumb Pore Value Chart

 

Based on the results of the average calculation, it was obtained that the buns using kale vegetable extract had an average value of 3.9 with the category of assessing rather large pores, the buns using kailan vegetable extract had an average value of 3.9 with the category of assessing rather large pores and the buns using mustard vegetable extract had an average value of 3.7 with the category of assessing rather large pores. The results of the statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the physical and sensory quality of the crumb pores where x2 count = 0.30 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2.  The formation of pores in bread is greatly influenced by the level of CO2 gas produced during the fermentation process. During fermentation, some of the CO2 gas will be lost and the rest will be trapped in the dough matrix which causes the formation of small pores that are evenly distributed in the dough or called the dough development process (leavening). The structure of the pores varies greatly and depends on the bread being made. Generally, the structure of the bread must have a uniform shape with thin cell walls (Faridah & Pramudia, 2019).

Crumb Color

The results of the panelists' sensory assessment of buns from the aspect of crumb color can be seen in the following image:

 

Figure 12.

Crumb Color Value Graph

 

Based on the results of the average calculation, it was obtained that buns using kale vegetable extract had an average value of 4.4 with the yellowish light green crumb color assessment category, kailan vegetable extract buns had an average value of 4.8 with the yellowish light green crumb color assessment category and buns using mustard greens vegetable extract had an average value of 4.5 with the yellowish light green crumb color assessment category. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the sensory quality in the aspect of crumb color where x2 count = 13.3 > x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. The results of Tuckey's test  were obtained that buns using kailan vegetable extract were the products that had the best quality in terms of crumb color. Green vegetables have a variety of green colors, some are light green to dark green. The green color possessed by chlorophyll has long been used as a natural dye in various products (Indrasti et al., 2019).

Taste

The results of the panelists' sensory assessment of buns from the aspect of taste can be seen in the following image:

 

Figure 13.

Flavor Value Graph

 

Based on the results of the average calculation, it was obtained that buns using kale vegetable extract had an average value of 4.3 with a rather sweet taste assessment category, buns using kailan vegetable extract had an average value of 4.4 with a rather sweet taste assessment category and buns using mustard greens extract had an average value of 4.5 with a rather sweet taste assessment category. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the physical and sensory quality in the taste aspect where x2 count = 0.19 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. Good quality bread must have a typical wheat bread taste, sweet, sour, bland or rancid and delicious (Lafuente et al., 2024).

Crumb Texture

The results of the panelists' sensory assessment of buns from the aspect of crumb texture can be seen in the following figure:

Figure 14.

Crumb Texture Value Graph

 

Based on the results of the average calculation, buns using kale vegetable extract had an average value of 4.2 with the fine crumb texture assessment category, buns using kailan vegetable extract had an average value of 4.3 with the fine crumb texture assessment category and buns using mustard vegetable extract had an average value of 4.1 with the fine crumb texture assessment category. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the physical and sensory quality of the crumb texture where x2 count = 0.42 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. One of the things that affects the texture of this bun is during the mixing of ingredients, stirring the dough, and the fermentation process. In the process of stirring the perfect bun dough, it produces a dough that is resistant to the formation of gluten to the maximum, which functions to hold gas during the fermentation process (Rizqullah & Elida, 2022).

Chewing Quality

The results of the panelists' sensory assessment of buns in terms of chewing quality can be seen in the following figure:

 

 

 

 

 

 

 

 

 

 


Figure 15.

Chew Quality Value Graph

 

Based on the results of the average calculation, it was obtained that buns using kale vegetable extract had an average value of 4.1 with the category of soft chewing quality assessment, buns using kailan vegetable extract had an average value of 4.1 with the category of soft chewing quality assessment and buns using mustard vegetable extract had an average value of 4.2 with the category of soft chewing quality assessment. The results of statistical analysis showed that there was no effect of the use of kale vegetable extract, kailan vegetable extract, and mustard greens extract in the making of buns on the physical and sensory quality of chewing quality where x2 count = 0.42 < x2 table = 5.99 at a significant level α = 0.05 with the degree of freedom df = 3 - 1 = 2. One of the things that affects the softness of bread is the use of fat. Fat can help control the evaporation of water content, so it can maintain the softness of bread during storage (Faridah & Pramudia, 2019).

 

Conclusion

This study examines the effect of the use of kale, kailan, and mustard greens vegetable extracts on the physical and sensory quality of buns. In the physical quality test of the volume aspect using the grain method with three repetitions and three treatments, the results of ANOVA RAL showed a significant influence of the three types of vegetable extracts. Follow-up tests using Duncan tests revealed that kailan vegetable extract provides the best quality in buns. However, for the high aspect physical quality test measured using the ruler method, the RAL ANOVA results showed that there was no significant influence of the three vegetable extracts. The sensory quality test using a hedonic quality test with 45 moderately trained panelists showed that buns with kailan vegetable extract obtained the highest average scores in terms of volume, skin color, shape, aroma of green vegetables, pores of crumbs, color of crumbs, and texture of crumbs. Buns with kale vegetable extract got the highest scores in terms of volume and pores of crumbs, while buns with mustard greens extract had the highest scores on skin surface character, skin character, bun aroma, taste, and chewing quality. Based on the results of this study, the use of kailan vegetable extract is recommended for further utilization in making buns, as it provides the best physical and sensory qualities compared to other vegetable extracts.

 

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Copyright holder:

Savina Putri Wahyudi, Cucu Cahyana, Annis Kandriasari (2024)

 

First publication right:

Advances in Social Humanities Research

 

This article is licensed under: