Fruit Skin Extract Research Articles

Formulasi Hair Tonic Ekstrak Etanol Kulit Buah Pepaya (Carica Papaya L.) dan Uji Efektivitas Pertumbuhan Rambut pada Marmut Jantan (Cavia porcellus)

Hair for humans has an important role, in addition to protecting the skin from adverse environments, hair also plays an important role in a person's appearance. Losing a lot of hair due to hair loss can cause a lack of self-confidence, disappointment, and frustration, so it must be addressed immediately so as not to worsen the condition that can cause baldness. This study aims to determine whether there is a content of secondary metabolite compounds in fresh herbal medicine, herbal medicine powder and ethanol extract of papaya fruit skin; ethanol extract of papaya fruit skin (Carica papaya L.) can be formulated in the form of hair tonic preparations; whether the difference in concentration of ethanol extract of papaya fruit skin (Carica papaya L.) provides different activities in triggering hair growth in guinea pigs. This research method uses a quantitative approach and is experimental with independent variables, namely papaya fruit skin, herbal medicine, and ethanol extract of papaya fruit skin with concentrations of 10%, 20%, 30%. Research stages: phytochemical screening of fresh papaya fruit peel, powdered simplicia and ethanol extract, hair tonic formulation containing ethanol extract of papaya fruit peel 10%, 20% and 30%, hair tonic evaluation includes: organoleptic, viscosity, stability, pH, irritation, and preference test. And hair growth activity test on male guinea pigs. The results showed that the ethanol extract of papaya fruit peel contains alkaloids, flavonoids, saponins, steroids, and glycosides, can be formulated into hair tonic (EEKP) that meets physical quality requirements. Hair tonic EEKP 30% is the best because it has high hair growth activity, which is an average of 16.375 mm where this EEKP 30% hair tonic has almost the same hair growth activity as the positive control, which is an average of 16.782 mm.

Formulation of Natural Food Coloring Granules from Dragon Fruit Peel Extract (Hylocereus polyrhizus) and Effectiveness Test in Reducing Blood Glucose Levels

Anthocyanin is one of the many compounds in dragon fruit skin that can be used as an antioxidant. Dragon fruit skin can also lower blood glucose levels. The fact that cases of diabetes mellitus are increasing every year shows that this disease needs serious treatment. This study aims to make dragon fruit skin extract formulated in the form of granules and make dragon fruit skin extract granules that meet the requirements as natural food coloring and to determine the content and effectiveness of dragon fruit skin extract (Hylocereus polyrhizus) which can lower blood glucose levels. This research method is experimental. The One Way Anova test and the Tukey HSD post-hoc test were used to analyze the data. The outcomes showed that there were 9 granule recipes that met the assessment test necessities. After being induced by 20% fructose solution, the glucose level study revealed that the treatment of dragon fruit skin extract at 100, 200, and 400 mg / kgBW was able to lower blood glucose levels in test animals. Winged serpent natural product skin concentrate can be formed as granules. Equations 2 and 3 produce the best tone. The consequences of the review reasoned that winged serpent natural product skin remove (Hylocereus polyrhizus) at dosages of 100, 200 and 400 mg/kgBW was viable in decreasing blood glucose levels in guinea pigs prompted by 20% fructose arrangement and a portion of 200 mg/kgBW gave an impact of lessening blood glucose levels that was practically equivalent to the positive control.

Antimicrobial Activity of Soaked and Boiled Jengkol Fruit Skin Extract against Staphylococcus aureus, Escherichia coli and Candida albicans

Jengkol (Archidendron jiringa) fruit skin contains saponin, tannin, flavonoid, and phenolic compounds which act as antimicrobials in inhibiting and killing microbial. This research aimed to analyze the differences in various jengkol fruit skin extracts in antimicrobial activity against test microbes, as well as to analyze the total phenolic content and total saponin content in each jengkol fruit skin extract. The research method was carried out using an experimental method. Factor A extract (soaking and boiling) and Factor B Microbe (Staphylococcus aureus, Escherichia coli, Candida albicans). The results of this research showed that extracts from soaking and boiling of jengkol fruit skin provided different inhibitory effects on the growth of S. aureus, E. coli, C. albicans. The best extraction method that produces the largest zone of inhibition for test microbes is boiling extract. The extract with the highest total phenolic content is boiling extract with a total phenolic content of 7.517 mgGAE/ml. The extract with the highest total saponin content is boiling extract with a total saponin content of 16.11%.

The Potential of Hyperglycemia Combination of Watermelon (Citrullus lanatus) Rind Extract and Red Dragon Fruit (Hylocereus polyrhizus) Peel Extract

This study aims to determine the potential hyperglycemia of the combination of Watermelon Skin Extract (Citrullus lanatus) and Red Dragon Fruit Skin Extract (Hylocereus polyrhizus). The research method used is the alloxane induction method. Rats were divided into 5 groups, namely positive control given metformin 45 mg / Kg BB, negative control given Na. CMC 1% w/v, and variations of test groups given combination extracts with concentration variations of 6% and 13.4%; 9% and 16.4%; and 12% and 19.4% then each group was induced alloxane at a dose of 24 mg / 200g BB. The results of the study on the negative control given NaCMC 1% did not show a decrease in blood sugar levels, in the positive control given metformin 45 mg / KgBB showed an average percent decrease of 94.12%, in the combination extract test group with a dose of 6% and 13.4% showed an average percent decrease of 25.04%; 9% and 16.4% % showed an average percent decrease of 24.69%; and 12% and 19.4% % showed an average percent decrease of 55.61%. Based on the results of this study, a combination extract of 12% and 19.4% can reduce blood sugar levels of white rats. This study proved that red watermelon peel extract and red dragon fruit peel extract have antihyperglycemia effects.

The polyphenolic suberized peridermal skin of the Sikkim cucumber acts as an effective chemical barrier against Botrytis cinerea infection

Certain species of fleshy fruit that undergo skin cracking are capable of forming a specialized polyphenolic periderm to seal the wounded skin. Some of the genetic and metabolic components pertaining periderm formation have been identified, however it remains unknown if, and to what extent, this specialized tissue can act as an efficient barrier against the invasion of pathogenic fungi. We monitored the infection process of Botrytis cinerea on the cuticle-coated skin of the common cucumber (Cucumis sativus) or on the polyphenolic suberized peridermal skin of the Sikkim cucumber (C. sativus var. sikkimensis). In vivo inoculation assays inferred that while B. cinerea can successfully penetrate and form necrotic lesions on sativus fruit, it is incapable of penetrating the peridermal skin of sikkimensis fruit. Gas chromatography-mass spectrometry (GC-MS) profiling of fruit skin extracts, in vitro conidial germination and germ tube elongation assays, and qRT-PCR cutinase-encoding gene expression analyses, inferred that the accumulation of suberin monomers in the peridermal skin of sikkimensis fruit stimulate increased elongation of B. cinerea germ tubes and significantly alters the differential expression of cutinase-encoding genes. Among them, Bcin0607010, Bcin08g01580 and Bcin07g06480, three yet unidentified cutinases, whose expression is specifically increased in the presence of sikkimensis fruit skin extracts. Our data demonstrate that a polyphenolic suberized peridermal skin in cucumber fruit can shape the interactions with B. cinerea and implies that suberization of fleshy fruit may provide a means for reducing damage imposed by this and other pathogens.

Efek Pemberian Kulit Buah Naga merah (Hylocereus polyrhizus) terhadap Tebal Endometrium dan Miometrium Tikus Model Menopause

ABSTRACT
 Effects of Giving Red Dragon Fruit Skin (Hylocereus polyrhizus) as Phytoestrogens on Endometriak Thickness and Myometrium of Menopausal Model Rats
 Background: Menopause is a condition in which the body experiences a lack of estrogen due to decreased ovarian function. Decreased estrogen levels result in particular changes in the thickness and shape of the uterus. Phytoestrogens are herbal compounds that have several similarities to the functions and structures of estrogen. Phytoestrogens also can be an alternative as a therapeutic option when they need a substitute for estrogen. Among several types of phytoestrogens, anthocyanin is one of the potential. Anthocyanins are mostly found in the red dragon fruit, Hylocereus polyrhizus. Red dragon fruit skin contains anthocyanins. Anthocyanins compounds have the potential to overcome the symptoms caused by menopause through their phytoestrogens and antioxidant activity.Objective: The main purpose of this study is to determine the effect of red dragon fruit skin extract (Hylocereus polyrhizus) on the thickness of the endometrium ad myometrium in menopausal model rats. Methods: This study applied a randomized post-test only control group design using a sample of 30 female wistar rats that met the inclusion and exclusion criteria. The sample was divided into 3 (three) treatment groups where a group was consisted of 10 female wistar rats. The treatment group 1 was the control group, while the treatment group 2 was the group given the ethanol extract of red dragon fruit skin at a dose of 60 mg/200 grBW/day for 30 days, and the treatment group 3 was the group given the ethanol extract of red dragon fruit skin at a dose of 90 mg/200 grBW/day for 30 days. Results: The study signified an increase in the endometrial thickness after being given red dragon fruit extract (Hylocereus polyrhizus) at a dose of 60 mg/200 grBW and 90 mg/200 grBW in menopausal model rats. In the single-lane ANOVA test, the thickness of the endometrium found a significance value of 0.038 (p<0.05), while the thickness of the myometrium found a significance value of 0.000 (p<0.05).

Formulasi Dan Uji Fisikokimia Gel Sleeping Mask Ekstrak Kulit Buah Naga Merah Dengan Variasi Gelling Agent Hydroxypropyl Methly Cellulose (HPMC)

Gels are semi-solid preparations formed from suspensions made up of large organic molecules and small inorganic particles that permeate the liquid. Sleeping mask It is a skin care product that is used at night (before going to bed). Serious research on natural ingredients is currently being carried out, including research in the field of cosmetics. Among the advantages of natural ingredients is their antioxidant properties, which can disrupt free radicals and cause the use of antioxidants in preventing premature aging. Dragon fruit skin contains compounds polyphenol, anthocyanins and betacyanins which have antioxidant activity. This study aims to determine the effect of the gelling agent Hydroxypropyl Methylcellulose (HPMC) on the physical properties of gel preparations sleeping mask red dragon fruit skin extract. This study uses an experimental method. Red dragon fruit skin is extracted by maceration in 96% ethanol. This study used 3 gel formulations, with various concentrations of HPMC 5%, 7% and 9%. Physicochemical tests carried out included organoleptic tests, homogeneity, pH, spreadability, adhesion, irritation and viscosity. The results of the research show the use of variations gelling agent HPMC meets the criteria for the physicochemical test of gel preparations sleeping mask from dragon fruit skin extract which produces the best formula from gel preparations sleeping mask namely formulation III (9%) has the best evaluation.

IDENTIFIKASI SENYAWA METABOLIT SEKUNDER DAN UJI TOKSISITAS HASIL FRAKSINASI EKSTRAK KULIT BUAH NAGA MERAH (Hylocereus polyrhizus)

East Kalimantan, especially the cities of Tana Paser, is one of the producers of dragon fruit, especially red dragon fruit (Hylocereus polyrhizus). The amount of consumer interest in red dragon fruit results in a large amount of dragon fruit peel waste that is not utilized. Several studies have shown that red dragon fruit skin extract has toxic properties that can be applied to cancer cells. So in this study, the extraction and fractionation process was carried out which was then continued with phytochemical tests and BSLT tests with the aim of knowing secondary metabolites in the aqueous extract fraction, ethyl acetate extract fraction and n-hexane extract fraction with phytochemical test methods and to determine the toxicity of the fraction. aqueous extract, ethyl acetate extract fraction and n-hexane extract fraction were carried out using the BSLT test method. The results of the phytochemical test showed that the aqueous fraction extract of dragon fruit peel contained alkaloids, phenolics and saponins. The extract of the ethyl acetate fraction of dragon fruit peel contains phenolics and flavonoids. Fralsi n-hexane dragon fruit peel \contains triterpenoids. The results of the BSLT test showed that the LC50 value of the aqueous fraction extract was 451.855 ppm, the ethyl acetate fraction extract was 374.024 ppm, and the n-hexane fraction extract was 312.176 ppm which overall was classified as moderately toxic. The highest toxicity effectiveness was shown in the n-hexane fraction extract with triterpenoid secondary metabolite compounds.

Pengaruh Penambahan Ekstrak Kulit Buah Naga Merah (Hylocereus polyrhizus) terhadap Karakteristrik Jelly Drink

This study aims to determine the effect of the comparison between red dragon fruit skin extract on the characteristics of jelly drink and to get the right red dragon fruit skin extract ratio to produce jelly drink with the best characteristics. The design used in this study was a completely randomized design with treatment consisting of 5 levels of concentration ratio of red dragon fruit skin extract namely: 20%, 24%, 28%, 32%, dan 36%. Each was repeated 3 times in order to obtain 15 experimental units. The data obtained were analyzed by analysis of variance and the treatment had a significant effect, then followed by the Duncan Multiple Range Test. The result showed that ratio of red dragon fruit skin extract had a significant effect on moisture content, color intensity (l,a,b), scor color, hedonic color, texture, overall acceptance, non significant effect to total anthocyanin, antioxidant capacity, aroma, and taste. The ratio of red dragon fruit skin extract concentrations of 32% produced the best characteristics, moisture content 88.02%, color intensity l* 40.83, a* 58.86, dan b* 33.36, total anthocyanin 0.98 mg/L, antioxidant capacity 9.95 mg GAEAC/100g, color liked and carmine, aroma, texture, taste, overall acceptance is liked.

Pengaruh Variasi Gliseril Monostearat pada Krim Ekstrak Kulit Buah Naga Merah Super (Hylocereus costaricensis) dan Uji Antioksidannya

A Glyceryl monostearate can be used as an emulsifier because it can affect the increase in antioxidant activity. The study aims to determine the effect of fluctuations in the concentration of glyceryl monostearate (GMS) on the physical properties of cream preparations containing 70% ethanol extract from the skin of super red dragon fruit and their antioxidant activity. The research methods carried out experimentally include the manufacture of extracts from super red dragon fruit peel, phytochemical screening using thin layer chromatography, formulations using various concentrations of glyceryl monostearate 8%, 10%, 12% then the physical quality of the cream and antioxidant activity test using the DPPH method. The results of one-way ANOVA for pH, dispersion, adhesion, and viscosity tests showed a p-value of> 0.05, indicating that there was no significant difference. The IC50 results obtained with equations 1, 2, and 3 are 3.69 mg/L, respectively. 3.98mg/L; and 4.78mg/L. Formula 3 is the best formula and estimates the antioxidant activity of Vitamin C, which is a positive control, at a value of 5.83 mg/L. The results of the irritation test showed that none of the formulations caused irritation. The preference test results showed that the respondents liked all the formulas. The conclusion of this study is that increased fluctuations in the concentration of glyceryl monostearate did not affect the physical properties of super red dragon fruit skin extract cream, but did affect its antioxidant activity.

Green synthesis of silver nanoparticles using Coffea canephora fruit skin extract and its application for mercury detection in face cream samples

Mercury is one of the most toxic heavy metals causing harmful effects on the human body; meanwhile, mercury is found in some face cream products to give a whitening effect. The upper limit concentration of mercury in skin-lightening products defined by the Food and Drug Administration (FDA) is under one mg/L as Hg2+. A new green analytical spectrophotometric method for mercury analysis has been developed by employing a biological reagent from fruit skin extract of robusta coffee (Coffea canephora) as a bioreductor for silver ions as well as a stabilizer for the AgNPs product. The detection principle of this method is based on the decrease of the color intensity of silver nanoparticles (AgNPs) after the addition of Hg2+ ions due to the re-oxidization of the AgNPs by Hg2+ ions to colorless Ag+ ions. To achieve the most significant sensitivity, linearity of measurement, and validity, the method was optimized toward the volume of AgNPs and reaction time. In this research, the synthesized AgNPs were also characterized by UV-Vis Spectrometry as well as a particle size analyzer (PSA) to determine the size of nanoparticles. The result showed that the optimum conditions were attained at 4mL AgNPs solution and 3-min reaction resulting in a linear measurement of Hg2+ in the range of 0-15mg/L with LOD and LOQ of 0.039 and 0.130mg/L, respectively. This method is quite selective and has been validated by applying it to real face cream samples with satisfactory results supported by average recoveries of close to 100%.

The Effect of Arabica Coffee Fruit Skin Extract (Coffea arabica L.) on the Histopathology of Mice (Mus musculus L.) Liver Induced by Ethanol

Excessive alcohol consumption can lead to serious live injury. Alcohol is a source of free radicals that can cause oxidative stress. The provision of antioxidants can counter the effects of free radicals that enter the body. The skin of the Arabica coffee fruit contains antioxidant compounds that can be used as a hepatoprotective in the liver. The skin of the Arabica coffe fruit contains antioxidant compounds that may have a hepatoprotective effect on the liver. This study aimed to determine the effect of extract of arabica coffee fruit skin on necrosis, infiltration and haemorrhage in the liver tissue of 15% EtOH-induced mice for 15 days. The animals used for this study were eight weeks old male Balb/c strain mouse weighing approximately 30-40 grams. This research is an experimental study. There were five groups: the control group (K), the 15% ethanol treatment group (E), and the ethanol-induced group and given different doses of arabica coffee skin extract: 125 mg/kg BW. (A), 250 mg / kg BW (B) and 500 mg / kg BW (C). Observation and identification of necrosis, hepatocyte infiltration and haemorrhage were carried out by using Hematoxylin-eosin staining. The data analysis used was One way ANOVA and continued by Duncan Multiple Range Test (DMRT). The histopathological observations showed that the extract of arabica coffee fruit skin at a 250 mg/kg BW dose reduced the number of cell necrosis. There was no infiltration of inflammatory and hemorrhagic cells in the liver of 15% EtOH-induced mice. This study concludes that the extract of the skin of the Arabica coffee fruit has hepatoprotective potential in 15% EtOH-induced mice.

Anti-Diabetic Effect of Snake Fruit Skin Extract in Alloxan-Induced Wistar Rat

Basic Health Research Report shows that an average prevalence of diabetes mellitus (DM) in urban areas is 5.7% in the population aged over 15 years. Many studies have been conducted to explore the pharmacological effects of snake fruit skin as different preparations against DM. In this study, the effect of snake fruit skin extract (SFSE) on body weight and blood glucose levels induced by alloxan was tested on 25 male Wistar rats. All rats were initially induced with 5% alloxan (150 mg/kg BW) then after 48 hours were grouped into: control (Na-CMC 0.5%), standard (Metformin), SFSE-I (60 mg/200 gBW), SFSE -II (120 mg/200 gBW), and SFSE-III (240 mg/200 gBW). The treatment was given for 14 days. The results showed that the tendency for the highest blood glucose levels of about 333 mg/dl (after 28 days of treatment) was found in the control group, followed by SFSE-I (222 mg/dl), -II (205 mg/dl), -III (138 mg/dl), and the lowest in the standard group was about 129 mg/dl. Hence, it can be concluded that SFSE which has the best antihyperglycemic effect was obtained with the highest dose of 240 mg/200 gBW.

The Role of Anthocyanin Substances from Dragon Fruit Skin Extract in Formalin Content Testing in White Tofu

One of the high-quality processed vegetable food ingredients is tofu. Tofu is made from processed soy milk with a thick texture and molded according to the right nutritional amount. White tofu is the most popular of the various forms of tofu available. Today, tofu producers have taken manipulative actions to anticipate production losses by including preservatives in the mix of ingredients used to make tofu. Most of the tofu production centers provide additional ingredients in the form of preservatives such as formalin to reduce losses from damage to the tofu they produce. The presence or absence of formalin in food can be detected using a unique component found in dragon fruit peel called anthocyanins. The methodology applied in this research is a simple and direct one, with primary data collected in the form of testing samples of white tofu collected from numerous traditional markets in the Banten area (up to ten samples). The aim of the research is to identify formalin in white tofu discovered in numerous traditional markets in Banten using natural component extracts, including dragon fruit peel extract. The results stated that there were two positive samples containing formalin and eight negative samples; the presence of formalin in tofu was indicated by a red color on the tissue. Sellers or customers can detect formalin simply by utilizing dragon fruit, allowing them to avoid formin which is harmful to health, with a simple and low-cost method.

The Effect of Giving Dragon Fruit Skin Extract (Hylocereus costarisensis) on the Quality of Se'i Beef Meat

This research has been conducted to determine the quality of processed meat mixed with dragon fruit skin extract (Hylocereus costarisensis) and determine the length of time of different watering. The method used was an experimental method with a design using a complete randomized design (CRD) consisting of 2 4x3 pattern factors consisting of 4 factors of dragon skin extract level of 0% (control), 40%, 60%, 80%, and 3 factors of duration time of watering 6 hours, 12 hours, 18 hours. Combining these two factors produces 12 combinations in each treatment and were repeated 3 times, thus there will be 36 experimental units. The parameters measured in the study were TBA, water activity, pH, total bacteria (TPC). Data analysis used Anova, if the impact is very significant (P<0.01) Duncan further test was conducted to determine the difference between treatment with SPSS 23 software. This study showed that the interaction between dragon fruit skin extract and the duration factor of watering had a very significant effect (P<0.01) on TBA, pH, TPC, antioxidant activity. The best combination for TBA, pH, TPC, antioxidant activity of meat se'i at 80% for 18 hours. While the activity of se'i water caused the Aw value to increase from 0.84 to 0.96, the best combination for the value of water activity meat se'i at the level of 60% with a length of 12 hours.

Aktivitas Antioksidan Kulit Buah Cempedak (Artocarpus integer (Thunb.) Merr.) asal Kalimantan Selatan

The increasing incidence of diseases related to oxidative stress among the human population has led to an increase in the consumption of natural antioxidants in the human diet. The purpose of this study was to determine the antioxidant activity of cempedak fruit skin extract with 50% ethanol and 70% ethanol as solvents. The method used was testing of radical inhibitory activity with the DPPH method (1,1-diphenyl-picrylhydrazil) and as a positive control was vitamin C. The results of phytochemical screening were known to contain phenolics, flavonoids, and tannins. The results of the antioxidant activity of E50% obtained IC50 values of 650.07 ppm and IC50 of E70 of 1219.69 ppm. From these results, it can be concluded that the skin of the cempedak fruit does not have antioxidant activity.

Increasing the Yield of Powder and Bioactive Materials during Extraction and Spray Drying of Dragon Fruit Skin Extracts

One potential utilization of dragon fruit skin is to produce bioactive materials as natural antioxidants and colorants for the food industry by extraction and spray drying. This study investigated the quality (total phenolic compounds/TPC, betacyanin and betaxanthin contents, and antioxidant activity) of the extracts and spray-dried products, and the quantity (powder yield) obtained by the use of different types and amounts of spray drying agents. Two drying agents were introduced during spray drying, i.e. maltodextrin and whey protein isolate (WPI). The result showed that a lower extraction solvent to solid ratio may result in a lower yield of TPC, betacyanin and betaxanthin contents, and also in antioxidant activity of the dragon fruit skin extract. In addition, maltodextrin and WPI were found to be able to significantly increase the yield from spray drying. The highest yield (72.7 ± 8.4%) was obtained with the use of 40% maltodextrin as drying agent, while the control yielded 9.5 ± 1.8%. Furthermore, it was found that the spray-dried product could recover more than 90% of the TPC and betacyanin in the extracts, which indicates that spray drying may be suitable for heat-sensitive materials.

Fabrication and characterization of a pH-sensitive intelligent film incorporating dragon fruit skin extract.

A novel intelligent pH‐sensing indicator based on gelatin film and anthocyanin extracted from dragon fruit skin (Hylocereus polyrhizus) (DFSE) as a natural dye was developed to monitor food freshness by the casting method. Anthocyanin content of DFSE was 15.66 ± 1.59 mg/L. Dragon fruit bovine gelatin films were characterized by Fourier transform infrared spectroscopy (FTIR) and observed by a scanning electron microscope (SEM). Moisture content, mechanical properties, water solubility, water vapor permeability (WVP), light transmittance, color, and pH‐sensing evaluations were evaluated for potential application. FTIR spectroscopy revealed that the extracted anthocyanin could interact with the other film components through hydrogen bonds. When the extract was added, films showed a smooth and clear surface as observed by SEM. The addition of anthocyanin increased the moisture content, thickness, and water solubility of the films, but decreased the WVP and light transmittance of films. Also, the incorporation of 15% v/v DFSE decreased the tensile strength from 17.04 to 12.91 MPa, increasing the elongation at break from 91.19% to 107.86%. The films showed higher ΔE with increasing DFSE content, which indicated that the film had good color variability. A significant difference in the color of the films was observed with exposure to different pH buffer solutions. The findings demonstrated that gelatin film incorporated with DFSE could be used as a visual indicator of pH variations to monitor the freshness of foods during storage time.

Grape Seed and Skin Extracts as Natural Preserving Agents on Strawberry Fruit

Concerning highly restricted application of chemicals in postharvest technology of horticultural crops, it is necessary to introduce the safe methods for preserving food or methods of food preservation. This study aimed to improve quality and prolong storage life of strawberry fruit by application of grape seed and fruit skin extracts and to compare them with calcium chloride as a chemical. In this study, strawberry fruit was individually immersed in the 1% and 2% CaCl2 solutions, seed and skin extracts (1 and 2 mg L-1) and then placed in polyethylene packaging for 24 d at 5±1 °C. Measurements of firmness, titrable acid, pH, weight loss, total antioxidant capacity, total phenolic, anthocyanin, vitamin C, enzymes' activity including catalase, peroxidase, and polyphenol oxidase and decay were carried out at 0, 6, 12, 18, and 24 d of storage. All applied treatments caused a significant effect on measured parameters including weight loss, titratable acidity, decay percentage and firmness, maintenance of anthocyanin and vitamin C contents, total phenolic, and antioxidant capacity. However, grape skin extract and grape seed extract showed the best results. Therefore, it can be concluded that Shiraz dark grape seed and skin extracts have the potential to control the decay incidence, prolong the storage life and preserve of postharvest valuable attributes of strawberry.

Skirining fitokimia ekstrak etanol kulit buah sirsak (Annona muricata Linn) dan uji aktivitas antioksidan dengan metode DPPH

Phytochemical screening research on the ethanol extract of soursop (Annona muricata Linn) peel and antioxidant activity was tested using the DPPH method. The purpose of this study was to determine several classes of compounds found in soursop rind and to determine the antioxidant activity of ethanol extract of soursop rind against DPPH free radicals. The results showed ethanol extract of positive soursop fruit skin containing flavonoids, tannins, and terpenoids. of soursop fruit skin extract was carried out by DPPH method results obtained IC50 value of 192.13 µg / mL ± 5.198137 which was categorized as weak.