Avocado Extract Research Articles

Bioactive Compounds, Composition and Potential Applications of Avocado Agro-Industrial Residues: A Review

In recent years, the global production and industrialization of avocados has led to the generation of large numbers of peel, seeds, and leaf by-products with significant environmental implications. Current efforts, including the Sustainable Development Goals, aim towards the development of sustainable operations through the valorization of waste. Previous research has focused on studying the rich chemical composition of these avocado by-products. Current studies are working on the isolation of polyphenols, flavonoids, phenolic acids and other bioactive compounds found in avocado peel, seeds and leaves for applications in nutraceutical products in the food, pharmaceuticals and cosmetics industries. The inclusion of these extracts in industrial matrices often requires stabilization technologies such as encapsulation emulsions to ensure the delivery and bioactivity of these target compounds. This review will discuss the global production volumes of avocado and its by-products as well as the potential inclusion in various industries based on their chemical compositions. Additionally, this work addresses the various applications that have been previously proposed for the wastes and their extracts. This review also covers the stabilization techniques previously employed in avocado extract treatment, their applications, and the current challenges and opportunities associated with avocado by-products.

Application of Antioxidant‐ and Antimicrobial‐Rich Extracts From Hass Avocado Pulp in the Development of Chitosan/Gelatin‐Based Active Packaging Films for Raw Meat Preservation

ABSTRACTIn the present study, the ethanolic extracts derived from Hass avocado pulp were observed to exhibit exceptional bioactive qualities and demonstrate bactericidal efficacy against a wide range of microorganisms, encompassing both gram‐positive and gram‐negative bacteria, as well as fungi. Therefore, this work aimed to develop a biodegradable active film by incorporating the Hass avocado extracts into chitosan/gelatin‐based film (HGCF) for the preservation of beef and pork. The study reveals that the chitosan/gelatin‐based film (GCF) and HGCF exhibit significant water stability and absorption capabilities. HGCF offered the synergy of antimicrobial properties of Hass avocado extracts and high swelling in water of chitosan/gelatin blend to absorb liquid discharged from fresh meat for prolonged storage. HGCF demonstrated a significant effectiveness in controlling microbial density in comparison to uncoated samples and samples coated with plain gelatin/chitosan film. In detail, HGCF was able to partially eliminate Staphylococcus aureus and Escherichia coli during storage, resulting in the densities after 14 days that were similar to those of uncoated meat samples after 6 days. These results demonstrate the potential of HGCF as active packaging for food preservation and advance the sustainable production and preservation of meat products.

Discovery of Natural Products for Cancer Prevention.

"Cancer chemoprevention" is a term referring to the slowing or reversal of this disease, using nontoxic natural or synthetic compounds. For about 50 years, there has been a strong scientific interest in discovering plant-derived compounds to prevent cancer, and strategies for this purpose using a concerted series of in vitro, ex vivo, and in vivo laboratory bioassays have been developed. Five examples of the more thoroughly investigated agents of this type are described herein, which are each supported by detailed literature reports, inclusive of ellagic acid, isoliquiritigenin, lycopene, trans-resveratrol, and sulforaphane. In addition, extracts of the plants avocado (Persea americana), noni (Morinda citrifolia), açai (Euterpe oleracea), and mangosteen (Garcinia mangostana) have all shown inhibitory activity in an in vivo or ex vivo bioassay using a carcinogen and germane to cancer chemoprevention, and selected in vitro-active constituents are described for each of these 4 species.

ANTI-HYPERLIPIDEMIA ACTIVITY IN THE VIVO TEST FROM A COMBINATION OF AVOCADO LEAF EXTRACT (Persea americana Mill) AND GINGER RHIZOME (Curcuma xanthorrhiza Roxb) IN MICE WITH HYPERCHOLESTEROLEMIA

Herbal and traditional medicine are two of the main types of treatment in developing countries, including Indonesia. Hyperlipidemia is a condition in which cholesterol levels in the body exceed normal limits, impacting cardiovascular disease. Avocado leaves and temulawak rhizomes have been shown to have antihyperlipidemic effects in animals. This study aimed to determine the anti-hyperlipidemic activity of avocado leaf (Persea americana Mill) and temulawak rhizome (Curcuma xanthorrhiza Roxb) combination extract in cholesterol levels of white male mice Sprague Dawley strain. The subjects of this study consisted of 20 white male mice Sprague Dawley strain (Rattus novergicus) and were divided into five groups: F1 (standard); F2 (hypercholesterolemic group); F3 (1:1 treatment group); F4 (1:2 treatment group); and F5 (2:1 treatment group). The induction was conducted for 14 days, while the treatment was carried out for seven days. All data were analyzed using the Kruskal-Wallis and Mann-Whitney tests. The combination extract of avocado and temulawak rhizome has an anti-hyperlipidemic activity. Giving a combination extract of avocado leaf and temulawak rhizome to all treatment groups significantly reduced total cholesterol levels in mice (p = 0.028). Avocado leaves and temulawak rhizomes have potential antihyperlipidemic activity derived from flavonoids. In this study, the potency of the extract efficacy can be achieved when given in combination.

Avocado seed extract encapsulated in zein nanoparticles as a functional ingredient

Nano-delivery of natural compounds has gained increasing attention in the food and pharmaceutical ingredients industry. Avocado seed was extracted by a total lipid extraction and the presence of two acetogenin compounds was confirmed by the high-performance liquid chromatography (LC-MS) technique. Then, the avocado seed extract (Avo) was encapsulated into zein nanoparticles by liquid-liquid dispersion and the formation of zein nanoparticles loaded with avocado seed extract (Avo-ZNPs) was confirmed by FTIR analysis. The Avo-ZNPs with various Avo contents showed an average size ranging from 166.9 ± 14.1 to 305.2 ± 16.2 nm with 0.19–0.26 of polydispersity index (PDI), and a surface charge range was −59.5 ± 8.1 to −32.9 ± 0.4 mV, as measured by dynamic light scattering (DLS). The entrapment efficiency (EE) values were up to 82 % and the highest loading capacity (LoC) was 14.8 %. The Avo-ZNPs were found to have significantly higher antioxidant potency compared to the control, as measured by DPPH and FRAP assays. Moreover, the zein nanoparticles were also biocompatible with the acute myeloid leukemia (AML) cell lines, and encapsulated avocado extract induced leukemia cell death. Thus, zein nanoparticles could be a promising delivery system for natural avocado seed extract to be used in the medical and food industries.

Avocado and Its By-Products as Natural Sources of Valuable Anti-Inflammatory and Antioxidant Bioactives for Functional Foods and Cosmetics with Health-Promoting Properties

Avocado (Persea americana) is a unique fruit with exceptional nutritional and technological characteristics, as well as proposed health benefits. Moreover, the commercial utilization of avocado to make guacamole and/or to extract its oil for several applications generates massive amounts of avocado bio-wastes, including peels and seeds by-products, which further impact the environment and waste management costs. Within this article, the proposed health benefits of moderate avocado consumption, as a functional component of a balanced diet against inflammation-related chronic disorders, and its potential applications are fully addressed. The numerous bioactive compounds present in avocado fruit and its by-products, such as its bioactive phenolics, dietary fiber, and lipid bioactives like unsaturated fatty acids and polar lipids, are also thoroughly outlined. The functional anti-inflammatory, antithrombotic, and antioxidant properties of each of these bioactives and avocado extracts, are then thoroughly reviewed. Emphasis is given to these avocado-derived bioactives and extracts that have the potential to be utilized in various industrial applications, such as in functional foods, supplements, nutraceuticals, and cosmetics related health-promoting applications. The limitations and future perspectives of these applications based on avocado bioactives are also discussed.

Comparison of Antioxidant Activity of Methanol Extract of Young and Old Leaves of Avocado (Persea americana Mill.)

Avocado plants (Persea americana Mill.) are widely grown in tropical and subtropical regions. Avocado leaves contain natural antioxidants for traditional medicine. This study aims to determine the total phenolic content, total flavonoids, and antioxidant activity values of young and old avocado leaves, and analyze the relationship between total phenol content and total flavonoids to the antioxidant activity value of avocado leaf methanol extract (Persea americana Mill.). The macerated avocado leaf extract was quantitatively tested for antioxidant activity using the DPPH method and the total phenolic and flavonoid contents were calculated using the Follin-Ciocalteu and Follin-Ciocalteu methods, respectively.The results showed that the highest total phenolic content of old avocado leaves was 1.682,27mg GAE/100g dry weight. The highest total flavonoid content of avocado old leaves was 3.858,96mg QE/100g dry weight. Antioxidant activity of methanol extract of young avocado leaves has a value of IC50 321.32 ± 80.43 ppm and avocado old leaves amounted to 288.54 ± 33.06 ppm. Total flavonoid content was more influential on antioxidant activity, with a correlation coefficient of 0.856

Antibacterial activity of avocado extract (Persea americana Mill.) against aminoglycoside-resistant Klebsiella pneumoniae strains

Klebsiella pneumoniae is an important etiological agent of nosocomial infections. This study focuses on the antibacterial activity of Persea Americana extract against K. pneumoniae strains containing aminoglycoside genes. Broth microdilution technique was used to examine the antibacterial activity of P. americana extract on K. pneumoniae isolates. The phenolic components of its leaves were analysed by the HPLC-DAD system. The binding potential of the major phytochemical component of the extract, chlorogenic acid, to the KsgA was investigated by molecular docking. The stability of the resulting enzyme-ligand complexes was also assessed through molecular dynamics simulation. The result obtained showed that P. americana extract had antibacterial activity on aminoglycoside resistant strains. The binding potential of chlorogenic acid (main phenolic compound) to KsgA was found to be higher than the binding of gentamicin. Since chlorogenic acid had lower binding energy and formed higher number of H-bonding as well as other interactions in the docking analysis. The higher binding potential of the major component with the enzyme that was involved in resistance development against aminoglycoside indicated its possible role in overturning the condition. Moreover, the molecular dynamics simulation study revealed that chlorogenic acid formed a complex with relatively higher stability. The higher binding potential of the major component with higher stability implied that the computational results confirmed the experimental findings.

Antibacterial Potential of Ethanolic Extract of Avocado Leaves (Persea americana mill.) against Clinical Isolate of Klebsiella pneumoniae and Proteus mirabilis

Multidrug resistance is a global health problem that is closely related to microbial resistance. Klebsiella pneumonia and Proteus mirabilis are opportunistic bacteria that cause urinary tract infections, especially in the use of catheters in hospitals in inpatient care. Handling it using commercial antibiotics can increase the effect of antibacterial resistance if the use is irrational and neglected. Avocado leaves have been reported to have antibacterial, antidiabetic and antioxidant activity. The purpose of this study was to observe into the antibacterial activity of avocado leaves ethanol extract against K. pneumoniae and P. mirabilis. The minimum inhibitory concentration (MIC) was determined using the Kirby-Bauer method, the minimum bactericidal concentration (MBC) was determined using the streaking method of the inhibition zone formed, and the mechanism of bacterial membrane leakage cell was measured using UV-VIS spectrophotometry at wavelengths of 260 and 280 nm. The MIC value was found to be 3.125 mg/mL in both bacteria, with an inhibition zone of 6.43 ± 0.06 mm (K. pneumoniae) and 6.73 ± 0.15 mm (P. mirabilis). The MBC value at 200 mg/mL with a percent reduction of 98.35 % (K. pneumoniae) and at 100 mg/mL with a percent reduction of 98.06 % (P. mirabilis). The supernatant of a membrane leakage cell (DNA and protein) was absorbed at wavelengths of 260 and 280 nm. It can be concluded that the ethanolic extract of avocado leaves has antibacterial potential against clinical isolates of K. pneumoniae and P. mirabilis. HIGHLIGHTS Avocado leaves, which are typically discarded, can be repurposed as a potent antibacterial agent in traditional medicine Demonstrates a potent minimum inhibitory concentration with a minimum bactericidal concentration value that can effectively suppress bacterial growth Point number 2 is substantiated by the utilization of DNA and protein cell leakage tests, as evidenced by absorbance measurements at wavelengths of 260 and 280 nm Flavonoid secondary metabolite have been successfully identified as one of the active components using the TLC analysis method GRAPHICAL ABSTRACT

Mitigating alcohol-induced neurohepatotoxicity in male albino rats with avocado and mustard

Alcohol abuse is dangerous to one’s health and contributes to disorders such as neurotoxicity and hepatotoxicity worldwide. Twenty-five male albino rats, each weighing 200 ± 10 g, were divided into five groups. For 4 weeks, rats in the control group were given only a regular chow diet and ad libitum. Rats in the alcohol group received an oral gavage of alcohol at a dose of 40 mg/kg body weight each day. Rats in the alcohol and avocado extract group received oral gavage doses of 250 mg/kg b. wt./day of avocado extract and 40 mg/kg b. wt. of alcohol. Rats in the alcohol and mustard seed extract group received oral gavage doses of 250 mg/kg/day of mustard seed extract and 40 mg/kg/day of alcohol, respectively. Rats were given alcohol and a mixture of avocado and mustard seed extract at a dose of 250 mg/kg body weight each day by oral gavage for 4 weeks. Our results showed increased levels of hydrogen peroxide (H2O2) and lipid peroxidation in the liver and brain tissues, decreased glutathione content, glutathione peroxidase, superoxide dismutase, catalase, and glutathione-S-transferase. In rats consumed excessive alcohol, there was an increase in the activity of the tumor marker α-l-fucosidase in sera. Additionally, the liver and brain tissues of the alcoholic group showed decreased cytochrome c oxidase activity. Furthermore, changes in the expression levels of the genes for brain α-secretase and liver alcohol dehydrogenase (ADH) were observed. The administration of extracts from avocado and mustard seeds improved the state of oxidative stress and restored antioxidant enzyme activity. The expression levels of brain α-secretase and liver ADH genes were almost fully recovered at the molecular level.

Phytochemicals Present in Ethanol Extract of Avocado Seed and Its Potential Antioxidant Effect

Introduction: Pharmaceutical research currently focuses on methods that allow for more sustainable and natural approaches. In this way, the use of discarded by-products, such as avocado seed, becomes a profitable and sustainable practice. Methods: This study evaluated the extraction of phytochemicals from avocado seed (Soxhlet extraction) and compared the antioxidant capacity of avocado seed (DPPH method). The extraction found compounds of different hydrophobicity and a vast amount of compounds that may present the potential for future clinical trials. Results: Avocado extract presented an antioxidant effect (AA%) more effective than Quercetin (3.5%), Ascorbic Acid (2.8%,) and lightly lower than Rutin (-1.9%). Conclusion: Therefore, the avocado seed can be an excellent alternative for research of antioxidants and therapeutic phytochemicals.

Characterization of antifungal properties of avocado leaves and majagua flowers extracts and their potential application to control Alternaria alternata

Plant extracts are used as an alternative to a wide range of foods against different types of fungal pathogens. In the present study, the extracts of avocado leaves (Persea americana) and majagua flowers (Talipariti elatum) were tested according to their antifungal activity against different fungi. The most promising extracts were those of majagua flowers that were applied lyophilized and in aqueous extract, being very effective against Alternaria alternata and reaching a 50 % in vitro reduction. Antifungal properties were also evaluated during infection of apples by A. alternata. A decrease in infection progression was confirmed with up to a 30 % reduction in disease incidence and a 20 % reduction in disease severity. Majagua extracts were also tested combined with edible pectin coatings, greatly increasing their effectiveness up 60 % reduction. Thus, extracts of majagua could provide a feasible alternative to control fungal pathogens during postharvest.

Synergistic Efficacy, Antimicrobial and Wound Healing Potentials of Milled Persea Americana Seed / Syzygium Aromaticum Oil Against Albino Rats and Wound Isolates

This study aimed to investigate the effects of oil avocado extracts, vegetable oil, Goya oil, and clove oil and its healing potential on male and female albino rats and their antibacterial activity against surgical wound isolates. The antimicrobial efficacy of avocado seed oil and cloves extract against surgical wound isolates was investigated using the agar well diffusion method and a microplate reader to detect the killing time rate of each isolate against oil extracts applied topically to the wounds of albino rats. The following bacteria were isolated, Escherichia coli, Pseudomonas aeruginosa, Klebsiella oxytoca, Chrysobacterium meningosepticum, Klebsiella oxytoca, Escherichia coli, Acinetobacter baumannii and Bergeyella zoochelum. The wound healing process was evaluated by measuring the serum and tissue bioassays and tissue repair enzymes. It was observed that Avocado seed oil infused in vegetables has the highest micro-titre reading against Bergeyella zoochelum (0.199) and Avocado oil infused in vegetable oil with cloves (0.100) against Chrysobacterium meningo septicum at 24 and 48 hours, respectively, this denotes bacteriostatics and Avocado oil infused in Goya with cloves against Bergeyella zoochelum (0.046) has the lowest value and Avocado oil infused in n-hexane against Escherichia coli has the highest value (0.080); this denotes bacteriocide activity of extracted oil. It was observed that the surgical wound on the albino rats closed within seven days and the measured tissue and serum bioassay were relatively under standard. The results of this study suggest that avocado seed oil and clove oil have potential natural alternatives to synthetic antimicrobial agents and treatment of wounds and wound infection in albino rats, as the avocado seed oil and clove used in this study inhibited all the surgical wound isolates.

Antibacterial Test Of Avocado Leaf Ethanol Extract (Persea americana Mill) On Staphylococcus Aureus Bacteria

Avocado leaves are one plant that can be used as an antibacterial. The chemical content of flavonoids, alkaloids, tannins and saponins has the potential to inhibit bacterial growth. This research aims to determine the antibacterial activity of ethanol extract of avocado leaves against Staphylococcus aureus bacteria. This research uses laboratory experiments using samples of avocado leaf extract (Persea viiiegativeviii Mill). With concentrations of 20%, 40%, 60% and 80% using the diffusion method. The ability of avocado leaf extract to inhibit Staphylococcus aureus bacteria can be seen from the size of the inhibition zone, namely positive by looking at the area of the inhibition zone around the disc using a caliper. This research shows that the diameter of the inhibition zone for Staphylococcus aureus at a concentration of 20% has an inhibition zone diameter of 8.81 mm, namely the medium category, a concentration of 40% has an inhibition zone diameter of 10.11 mm, namely the strong category, a concentration of 60% has an inhibition zone diameter. of 10.71 mm, namely the strong category, a concentration of 80% has an inhibitory zone diameter of 12.16 mm, namely the strong category. Based on the research results, it can be concluded that the ethanol extract of avocado leaves has activity to inhibit staphylococcus aureus bacteria

The Effect of Avocado Leaf Ethanol Extract (Persea Americana Mill) on Aspirin-Induced Reduction of Gastric Acid in Rats

Gastritis is inflammation of the mucosal lining of the stomach. Gastritis can be caused by several things, one of which is the use of anti-inflammatory drugs which can damage the gastric mucosal lining which occurs in two ways, namely local and systemic. Local damage is caused by being lipophilic and acidic, while systemic damage is caused by a significant decrease in prostaglandin production. Avocado leaf ethanol extract contains flavonoids and saponins which have anti-inflammatory effects and inhibit histamine secretion. This study aims to analyze the activity of ethanol extract of avocado leaves in reducing gastritis in vivo in rats induced by apirin. Samples of 60 mice weighing 150-200 g were divided into 5 groups, namely negative control group (CMC Na), positive control (Simetidine), ethanol extract of avocado leaves 100, 200, 400 mg/Kg BW. Mice were fasted for 24 hours, induced by aspirin 400 mg/KgBW for 24 hours and mice remained fasted. then given treatment according to group division for 8 days. Every 2 days after treatment, 3 mice were taken from each group to be sacrificed by dislocation, the mice's stomachs were dissected, all gastric fluid was collected and the stomach contents were removed and then washed with 0.9% NaCl solution. Gastric fluid is used to check fluid concentration and pH. Then the rat's stomach was opened by stretching it to count the number of ulcers and the ulcer index that occurred. The results of the study showed that the 400 mg/KgBW avocado leaf ethanol extract group had an anti-inflammatory effect that was almost the same as Cimetidine, this was shown by the results of decreasing gastric fluid concentration, decreasing the number of ulcers, decreasing the ulcer index and increasing gastric pH. Based on the description above, it can be concluded that the ethanol extract of avocado leaves has an anti-inflammatory effect in reducing gastritis.

Persea americana extract protects intestinal tissue from Eimeria papillata-induced murine Infection

Coccidiosis is the most prevalent disease-causing widespread economic loss among farm and domestic animals. Currently, several drugs are available for the control of this disease but resistance has been confirmed for all of them. There is an urgent need, therefore, for the identification of new sources as alternative treatments to control coccidiosis. The present work aimed to study the effect of the Persea americana extract (PAE) as an anti-coccidial, anti-oxidant, and anti-apoptotic modulator during murine intestinal Eimeria papillata infection. A total of 25 male mice were divided into five groups, as follows: Group1: Non-infected-non-treated (negative control), Group2: Non-infected-treated group with PAE (500 mg/kg b.w). Group3: Infected-non-treated (positive control), Group4: Infected-treated group with PAE (500 mg/kg b.w.), and Group5: Infected-treated group with Amprolium (120 mg/kg b.w.). Groups (3–5) were orally inoculated with 1 × 103 sporulated E. papillata oocysts. After 60 min of infection, groups (4 and 5) were treated for 5 consecutive days with the recommended doses of PAE and amprolium. The fact that PAE has an anti-coccidial efficacy against intestinal E. papillata infection in mice has been clarified by the reduction of fecal oocyst output on the 5th day post-infection by about 85.41%. Moreover, there is a significant reduction in the size of each parasite stage in the jejunal tissues of the infected-treated group with PAE. PAE counteracted the E. papillata-induced loss of glutathione peroxidase (GPx), superoxide dismutase (SOD), and total antioxidant capacity (TCA). E. papillata infection also induced an increase in the apoptotic cells expressed by caspase-3 which modulated after PAE treatment. Moreover, the mRNA expression of the goblet cell response gene, mucin (MUC2), was upregulated from 0.50 to 1.20-fold after treatment with PAE. Based on our results, PAE is a promising medicinal plant with anti-coccidial, anti-oxidant, and anti-apoptotic activities and could be used as a food additive.

Anti-obesity Effect of Bioengineered Silver Nanoparticles Synthesized from Persea americana on Obese Albino Rats.

Obesity is an immoderate or abnormal accretion of fat or adipose tissue in the body that is prone to damage the health of mankind. Persea americana (Avocados) is a nutritious fruit known for its several health benefits. The current research was planned to evaluate the anti-obesity activity of bioengineered Silver Nanoparticles (AgNPs) against a high-fat diet (HFD) treated obese albino rats. AgNPs were synthesized and characterized for the Phytochemical constituents, UV-vis Spectroscopy, FTIR, SEM and XRD. Furthermore, the lipid profile in serum, biochemical parameters and histopathological changes in tissues of albino rats were determined. The present study revealed the presence of tannins, flavonoids, steroids and saponins, carbohydrates, alkaloids, phenols and glycosides. The peak was disclosed at 402 nm in UV-vis spectroscopy, confirming the synthesis of AgNPs. FTIR analysis showed two peaks at 3332.25 cm-1 which correspond to the O-H stretch of the carboxylic acid band, and 1636.40 cm-1 represents the N-H stretch of the amide of proteins, respectively. This result confirms their contribution to the capping and stabilization of AgNPs. The XRD results confirm the crystalline nature of AgNPs, and SEM results indicated that the synthesized AgNPs were spherical. Further, the results of the current study showed the improved lipid profile and biochemical parameters in rats supplemented with methanolic pulp extract of Persea americana AgNPs when compared with other experimental groups. The histopathological findings displayed improved results with reduced hepatocyte degradation under the influence of AgNPs treatment. All the experimental evidence indicated the possible anti-obesity effect of silver nanoparticles synthesized from the methanolic pulp extract of Persea americana.

Optimization of Sunscreen Cream Formulation Containing Ethanolic Extract of Avocado Leaves (Persea americana Mill.) or Mangosteen Rind (Garcinia mangostana L.) Combined with Octyl Methoxycinnamate

Background: Most sunscreens contain chemicals that can cause health and environmental problems. Natural actives can be an alternative to minimize the use of chemicals. Avocado leaves (Persea americana Mill.) and mangosteen peel (Garcinia mangostana L.) contain active compounds that have UV absorption. Objective: In this study, the optimal composition of a mixture of ethanol extracts of avocado leaves or mangosteen peel with octyl methoxycinnamate (OMC) was determined based on the Sun Protection Factor (SPF) and adhesive properties using Response Surface Methodology (RSM). Material and method: The optimal formula calculated with RSM was then made and underwent a series of tests, including a hedonic test with a scale of 0-9 on 30 respondents, a freeze-thaw stability test, and an accelerated stability test with the Arrhenius equation. Results: The RSM analysis showed that the optimal concentration of extract and OMC was 10% and 0.75% (avocado leaves) & 0.65% (mangosteen peel). The optimized formula resulted in adhesive properties and SPF of 7.41±0.03 and 16.52±0.16 (avocado leaves) & 7.43±0.04 and 15.84±0.15 (mangosteen peel) respectively. Both optimized formulations were physically stable against freeze-thaw and had a t90 of 29 minutes (avocado leaves) and 17 minutes (mangosteen peel). The average hedonic scale obtained was 7.8 (avocado leaves) and 7.9 (mangosteen peel), indicating that both optimized formulations were preferred by the respondents. Conclusions: The sunscreen formulation with an optimized combination of active ingredients from avocado leaf extract or mangosteen peel extract with OMC using RSM results in preparation with SPF value and physical properties that meet the requirements.

Green Synthesis, Characterization, Antioxidant and Photocatalytic Dye Degradation Effects of Copper (Cu) Nanoparticles from the Aqueous Extract of Persea americana

Nanoparticles have played a very important role in modern research. This technology involves the synthesis of nanoparticles with controllable size, shape, and material dispersion at nanometer-scale lengths. In the current work, copper nanoparticles have been synthesized by simple green technology using Persea americana leaf extract. The formation of Cu NPs was monitored by recording UV-Vis absorption spectra showing surface plasmon resonance at 320 nm. The green synthetic copper nanoparticles will be further characterized by FT-IR, FESEM, EDS and XRD. FT-IR identified the presence of active groups and phenolic groups. The crystal morphology and size of the nanoparticles will be determined by FESEM and X-ray diffraction studies. It was found that the average particle size of the copper nanoparticles was in the range of 71 nm. These biosynthetic copper nanoparticles were tested for the photocatalytic dye degradation of commercially important textile dyes such as methylene blue The antioxidant activity of green synthesized nanoparticles from the fruit extract was analysed by DPPH-free radical scavenging assay method. The results show that green synthetic nanoparticles have strong dye degradation potential.

Histological Features of Different Organs Before and After Treatment of Diabetes by Using Avocado Extract in Rats

Aim of the study: The present study aimed to study histological features of different organs before and after treatment of diabetes by using avocado extract in rats. Materials and methods: Hot aqueous extraction of avocado was performed. Forty male rats (weighted 140–190g) were used in this study. Following the time of acclimatization, the animals had an overnight fast of 18 hours before being prepped for alloxan monohydrate-induced diabetes. Before and after induction, measurements of the animals' body weights and blood glucose levels were made. However, rats received an IP injection of alloxan 150 mg/kg bw. Following that, the rats' blood glucose levels were tracked every day for 3 weeks to establish a stable levels of blood glucose. The animals were divided into 4 groups: Group 1 got water as a non-induced (negative control) condition. Alloxan-induced rats in Group 2 received water as a positive control. Group 3: Alloxan-induced and aqueous extract-treated animals and Group 4 was only given a 40 g/L dose of the aqueous extract of avocado. Pancreas, livers, as well as kidneys from control, alloxanized, and treated rats were taken at different times, processed and utilized for histological examination after being preserved in 10% formaldehyde till processing and staining. Results: The current results showed a significant difference between different groups especially in G3 at different weeks. However, rats in G2 exhibited depleted islet cells and regions of cell necrosis. The tiny, preserved islet cells (PIL) in diabetic rats treated with extract after 1 week (G3) were an improvement as compared with rats at G2. As the days advanced, more improvements were seen in the pancreatic architecture of the rats treated with extract, including the presence of more noticeable islet cells and exocrine cells. As seen by the intact pancreatic islet in G3, caused the healing of the pancreatic tissue after 3 weeks of treatment by extracts. Alloxanized rats (G2) showed the presence of cell necrosis as well as infiltrations of inflammatory cells. However, as the course of therapy continued, it became clear that the tissue architecture had improved, and more glomeruli were seen as well as fewer inflammatory cells (G3). Livers of rats in (G2) showed visible cell necrosis, when compared to the histology of G1 and G4. After receiving medication, rats in group G3 had compact, healthy liver tissues after three weeks. In conclusion, the pancreas, kidneys, and liver were all protected by the avocado extract and showed enhancement in the histological architecture and glucose levels. KEY WORDS: Diabetes, Avocado, Histology, Rats.