Hot Ethanol Extracts Research Articles

Phytochemicals Screening, Antioxidantand Anticancer Activities of Garlic (Allium sativum) Extracts

The objective of this study is to determine the phytochemicals of garlic, antioxidants and anticancer activities against cancer cell line (MCF-7) of hot water, cold water and ethanol extracts of garlic (Allium Sativum). The results showed that garlic contains more than 80% total carbohydrates and proteins. Also, qualitative phytochemical analysis of garlic extracts indicated the presence of flavonoids, alkaloids, tannins, phenols, saponins, terpenoids, steroids and phytosterols in ethanol and hot water extracts, whereas alkaloids and saponins are absent in cold water extract. Moreover, antioxidant activity of garlic extracts by DPPH method showed a strong effect on the activity scavenging of free radicals. In addition, ethanol extract had higher reducing power, total flavonoids and total phenolics contents in comparison with hot water and cold water extracts. Finally, garlic extracts also showed very high cytotoxic activity against human breast cancer cell line type (MCF-7) especially ethanol extract, which makes us recommend that garlic is useful as a rich antioxidant and has great strength against cancer cells.

Antioxidant Effects of Cinnamomum cassia Bark Extract and its Effectiveness as a Cosmetics Ingredient

Purpose: This study examines potential abilities and commercial values of Cinnamon extract as bioactive and cosmetics ingredients. Methods: Cinnamomum cassia bark was extracted with hot water and 70% ethanol to examine its antioxidant effects through its total polyphenol, flavonoid content, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, and (2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) ABTS radical scavenging activity. Also, this study examined its nitric oxide (NO) inhibition effect through RAW 264.7 cells into which inflammatory reaction was induced by lipopolysaccharides (LPS), and antihistamine activity in the RBL- 2H3 cells. The antibacterial effects of Cinnamomum cassia bark extract on 8 types of bacteria were also studied. Results: As a result of measuring the antioxidant effect, the total polyphenol contents were 90.12 and 113.07 μg/mL, respectively, while the total flavonoid contents were 36.42 and 54.31 μg/mL, respectively. The DPPH scavenging effect was confirmed as 84.93% in the hot water extract and 90.25% in the ethanol extract for 400 μg/mL. The ABTS radical scavenging effect was 82.20% in the hot water extract and 92.21% in the ethanol extract for 400 μg/ mL. Upon measuring the NO inhibitive effect through the RAW 264.7 cells into which inflammation reaction was induced by LPS, the NO generation decreased to 14.57 μM in the hot water extract and 10.15 μM in the ethanol extract in the concentration of 100 μg/mL. This result, compared to the increase up to 20.11 μM by LPS, shows the NO inhibitive effect of Cinnamoum cassia bark extract. As a result of measuring the antihistamine activity in the RBL-2H3 cells, β-hexosaminidase increased to 176.21% by IgE-NDP whereas it was 117.25% in the hot water extract and 100.09% in the ethanol extract in the concentration of 100 μg/mL, confirming the inhibitive effect on β-hexosaminidase discharge. The antibacterial effect was confirmed on all bacteria through the measurement on the Cinnamomum cassia Bark extract on eight types of bacteria. Particularly, the antibacterial effect of the hot water extract and ethanol extract was found to be high in Staphylococcus epidermidis (S. epidermidis ), Pityrosporum ovale (P. ovale ). Conclusion: Cinnamomum cassia bark extract is deemed prospective as a natural functional cosmetics’ ingredient with excellent antioxidant, anti-inflammatory, antihistamine inhibitive and antibacterial effects.

Physiological activities and bioactive compound from laver (Pyropia yezoensis) hydrolysates by using subcritical water hydrolysis

This study aimed to create P. yezoensis hydrolysates, via subcritical water hydrolysis (SWH), which can enhance food functionality. P. yezoensis hydrolysates were produced at (120 to 230) °C and 30 bar. Extraction was performed using hot water and ethanol for comparison. The maximum radical-scavenging activity of DPPH and ABTS was (16.63 ± 0.20) mg trolox/g dried mass and (19.45 ± 0.07) mg trolox/g dried mass, respectively. The total phenolic, protein, and reducing sugar content was (14.29 ± 0.33) mg gallic acid/g dried mass, (20.21 ± 0.27) g BSA/100 g dried mass, and (158.40 ± 2.12) mg glucose/g dried mass, respectively. The total sugar content did not significantly change from 120 °C to 180 °C but decreased at higher temperatures. Free amino acid contents decreased as temperature increased to >120 °C. Results showed that both hot water extraction and ethanol extraction are not superior to SWH.

Identification and Extraction Optimization of Active Constituents in Citrus junos Seib ex TANAKA Peel and Its Biological Evaluation.

Citrus junos Seib ex TANAKA possesses various biological effects. It has been used in oriental remedies for blood circulation and the common cold. Recently, biological effects of C. junos peel have been reported. However, optimization of the biological properties of C. junos peel preparations has yet to be reported on. We developed a high-performance liquid chromatography (HPLC) method for quantification of the active constituents in C. junos peel. Hot water and ethanolic extracts of C. junos peel were prepared and their chemical profiles and biological activities were evaluated. The 80% ethanolic extract demonstrated the greatest antioxidant activity and phenolic content, while the 100% ethanolic extract had the greatest xanthine oxidase inhibitory activity. Elastase inhibition activity was superior in aqueous and 20% ethanolic extracts. The contents of two flavonoids were highest in the 100% ethanolic extract. We postulated that the antioxidant and anti-aging effects of C. junos peel extract could be attributed to phenolics such as flavonoids. Our results suggest that the flavonoid-rich extract of C. junos may be utilized for the treatment and prevention of metabolic disease and hyperuricemia while the water-soluble extract of C. junos could be used as a source for its anti-aging properties.

Determination of bioactive properties of food grade extracts from Icelandic edible brown seaweed sugar kelp (Saccharina latissima) with in vitro human cell cultures (THP-1).

Background: Sugar kelp (Saccharina latissima, formerly known as Laminaria saccharina) is a brown seaweed which naturally occurs in the North Atlantic. Seaweeds may be one of the last natural food resources abundantly available. They are known to contain many compounds which may have additional functional benefits. This edible seaweed is characterized by high content of nutrients including carbohydrates and polyphenols, which are recognized antioxidants. Because their natural environment is a 3% saline solution, they are very resistant to mild extraction methods. However, extracts from solvent extractions usually contain residual solvents, making them unacceptable for high quality functional foods and high end cosmetics. The objective of this study was to test the biological properties of three extracts from sugar kelp (Saccharina latissima).Methods: Cold water, hot water, and ethanol: water (70:30 v/v) extracts were prepared. Total Carbohydrate Content (TCC) was determined by the phenol – sulphuric acid method and values were expressed as mg of fucose/g of dry extract. Total Polyphenol Content (TPC) was determined and expressed as mg of Gallic Acid Equivalent (GAE)/100g of dry extract. Oxygen Radical Absorbance Capacity (ORAC) assay was performed for all extracts and values were expressed as µM of Trolox® Equivalent/g of dry extract. Human leukemia monocytic cell line (THP-1) was used to investigate the bioactivity of Saccharina extracts. Extracts were applied to PMA differentiated THP-1 cells. Cytotoxicity of derived extracts was assessed by light microscopy followed by XTT proliferation assay. Enzyme-linked Immunosorbent assays (ELISA) were performed to determine secretion of interleukin – 10 (IL-10), tumor necrosis factor – α (TNF-α) and interleukin – 6 (IL-6).Results: The cold water extract exhibited very toxic properties toward macrophages and was thereby excluded from the experimental proceedings with use of the macrophages. Among all the tested extracts, the hot water extract was richest in sugars (682±243 mg fucose/g dry extract) and polyphenols (96.5±5.6 mg GAE/g dry extract), which was correlated to the determined ORAC values (1686±99 μM TE/g dry extract). The addition of hot water and ethanol extracts at concentrations 100 μg/ml triggered secretion of pro-inflammatory cytokine TNF-α suggesting immunomodulatory properties of Saccharina extracts toward macrophages. Conclusions: The present study suggests that carbohydrate enriched extracts from Icelandic edible seaweed Saccharina latissima have antioxidant and immunomodulatory properties towards human THP–1 derived macrophages. The carbohydrate and polyphenol correlated with ORAC values confirming antioxidant properties of the derived extracts. The hot water extract affected the pro–inflammatory (TNF–α) and anti–inflammatory (IL–10) cytokine secretion in macrophages, suggesting their bioactivity through immunomodulatory actions and can be considered for practical applications in functional foods and cosmetics.Keywords: Seaweeds; Saccharina latissima; bioactivity; antioxidants; immunomodulation

ANTIMICROBIAL ACTIVITY OF CHINABERRY Melia Azedarach EXTRACT AGAINST Pseudomonas syringae PV. syringae IN VITRO

Using hot aqueous, cold aqueous and ethanol, the antimicrobial activity of both fresh leaves and chinaberry fruits extract were evaluated at 50, 100, 150, and 200 mg ml-1 against Pseudomonas syringae pv. syringae (Pss) growth on nutrient agar medium. Fruit extract was inhibited bacterial growth evidently with 8.84 mm in diameter, the hot aqueous and ethanol extracts showed a high antimicrobial potential when the inhibition zones reached to 8.68mm and 8.85mm, respectively. The results exhibited the imperceptible augmentation of inhibition zones of Pss growth with increasing extract doses (50, 100, 150, and 200) mg ml-1 and attained (6.72, 7.46, 8.89, and 10.37) mm, respectively. The highest and considerable inhibition zone 9.32 mm appeared using ethanol extract of fruit, the latter was more obvious on the bacterial development and inhibited its growth to 11.2mm when used at 200 mg ml-1, followed by leaf extract at the same concentration. Extracts at 200 mg ml-1 revealed substantial inhibition zone ranged between 10.37mm and 10.95mm using different methods. Therefore, the combination of ethanol extract of fruit at 200 mg ml-1 gave the maximum inhibition 11.7mm in diameter, followed by 10.97mm and 10.93mm when used hot and cold aqueous extracts.

Antimicrobial Effect of Acacia Nilotica on Some Gram Positive and Gram Negative Bacteria

Acacia nilotica is a plant has an inspiring range of medicinal uses. This plant contributes a number of groups among which are alkaloids, volatile essential oils, phenols and phenolic glycosides, resins, oleosins, steroids, tannins and terpenes, this study aims to: examine the antimicrobial action of ethanolic extraction from fruits and seeds of Acacia nilotica. Hot ethanol extract (48°C) of fruits and seeds obtained from Acacia nilotica, used in minimum bactericidal concentration (MBC), agar diffusion method to detect the antibacterial effect of the extract. Elucidate almost for all bacterial types used in this study, the concentration of 100mg/ml was the mostly effective concentration on bacteria (Staphylococcus aureus, Streptococcus pneumonia, and Proteus mirabilis); while the E. coli and Pseudomonas aeruginosa the concentration of 75 mg/ml was the effective concentration for both of them as an optimum concentration.

The antimicrobial activity of some medical plants against bacteria that cause urinary tract infection

This study was done to evaluate the antibacterial activity of hot ethanolic and aqueous extracts of Syzygium aromatic (S.aromatic ) and Q.infectoria infectoria (gall) against pathogenic bacteria that cause urinary tract infection (UTI). Such as Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. Qualitative detection of the active compounds of the plant extracts was done with chemical reagents. Also, the Qualitative detection of the active groups was further verified with (FTIR). The sensitivity of the UTI causing bacteria was examined against 12 different antibiotics. The results show that E.coli was the most resistant bacteria, resisting 8 from 12 antibiotics; P.aeruginosa resisted 5 from 12 antibiotics; while S.aureus showed resistance to 4 only. The antibacterial activity of the plant extracts was investigated by using four concentrations (40, 60, 80, 100 mg/ml) for each extract against two types of Gram negative bacteria (E.coli, P.aeruginosa), and one type of Gram-positive bacteria (S. aureus). The plant extracts showed different effects on the growth of all bacterial strains. The Minimum Inhibitory Concentration (MIC) and the Minimum bactericidal concentration (MBC) of the ethanolic extracts and aqueous extracts in the study were determined.The kill- time was determined also for each extract.The antioxidant activity of the plants in the study was investigated. Finally, the toxicity of the plant extracts was examined on human red blood cells.

Antimicrobial and Antioxidant Activity of Hot Water and Ethanol Extracts of Ricinus communis L. Leaves and Fruits

천연 항균제 및 항산화제 개발의 일환으로 선택한 피마자 열매의 열수 추출물(RFW)과 에탄올 추출물(RFE)은 각각 15.8%와 18.4%의 수율을 나타냈다. Paper-disc method을 통한 항균활성 측정 결과, 피마자 열매를 에탄올로 추출한 추출물 에서 항균활성이 나타났다. 특히 녹농균 및 황색포도상구균에서 활성이 우수하였으며, 캔디다균에서도 배양 16시간까지 1.5mm 정도의 항균활성이 나타났으나 24시간 이후에는 캔디다균의 증식이 다시 관찰되었다. 피마자 열매 에탄올추출물 (RFE)의 MIC실험 결과 S. aureus와 P. aeruginosa에서 각각 96%와 93%의 항균력이 나타났다. 피마자 잎 열수추출물 (RLW)과 피마자 잎 에탄올추출물(RLE)의 DPPH radical 소거능 측정을 통한 항산화 효능 결과는 1000(㎍/㎖)에서 각각 1.8±0.6%, 2.1±0.7%의 free radical 소거율을 나타냈다. 본 연구가 향후 천연물을 이용한 항균제 및 항산화제 개발을 위한 기초 자료로 제공되리라 사료된다.

Neuritogenic and in vitro antioxidant activities of Malaysian Gracilaria manilaensis Yamamoto & Trono

Numerous marine-based compounds have been identified as having diverse biological activities. Gracilaria manilaensis Yamamoto & Trono is a red agarophyte endemic to the Malaysia coastal area. It is used as a gelling and thickening agent for food industries. In this study, the rat pheochromocytoma cell line (PC-12Adh) was employed as in vitro model to investigate the neuritogenic activities in hot aqueous, methanol, and ethanol extracts of G. manilaensis. Phytochemical contents and in vitro antioxidant activities of the extracts were also determined. All G. manilaensis extracts were found to increase the percentage of neurite-bearing cells and upregulated the neuronal cytoskeleton of PC-12Adh cells with no inhibition across the tested concentration range (0–0.15 mg mL−1). The methanol and ethanol extracts had higher phenolic and flavonoid contents than the hot aqueous extract. They also showed higher antioxidant activities against 2,2-diphenyl-1-pircryhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) free radicals and higher reducing power compared to the hot aqueous extract. It is believed that G. manilaensis may possess potent bioactive compounds that mimic the neuroactivity of the nerve growth factor (NGF) for neuronal survival, development, and differentiation. It has been suggested that agar producer G. manilaensis might be a promising dietary supplement for cognitive health in the prevention of neurological disorders.

Hot ethanol extraction: economic feasibility of a new and green process

A new extraction process using ethanol at a temperature above boiling point is assessed from an economic point of view. The study was based on an assessment of the main operating costs adjusted by Lang’s factor. Operating costs were assessed based on energy consumption calculated using a model of the process developed from experimental results, and for a hypothetical unit with a 160 000 t/year rapeseed crushing capacity. The processing cost was estimated at 47.4 € per ton of processed seed. Amortization represented 35% of this cost, energy 32% and manpower 10%. Uncertainty about investment is the main factor that could lead to significant error in this cost, but this uncertainty could be offset by an adjustment of the amortization duration, most of the equipment being durable. Profit generated by the process relies principally on a better valuation of the meal: higher value comes from higher protein content and quality on the market for GM-free high protein feedstuffs. Oil quality is also improved by a lower oleic acidity, low phospholipid content and pigment concentration. This gain was estimated at 2.5% of the crude oil value. Unlike the conventional hexane process, hot ethanol extraction produces molasses in small proportions. Molasses value was set at 70% of corn price. The process profitability appears sufficiently positive to justify further research to test the hypothesis underlying our model. The main uncertainty lies in the performance of the process in real conditions of counter-flow extraction and solvent regeneration.

Assessment of Hot Water and Ethanolic Leaf Extracts of Cymbopogon Citrates Stapf (Lemon Grass) against Selected Bacteria Pathogens

Assessment of Hot Water and Ethanolic Leaf Extracts of Cymbopogon Citrates Stapf (Lemon Grass) against Selected Bacteria Pathogens

Antioxidant and Cytotoxic Activities of Hot Water and Ethanol Extracts From Caesalpinia sappan

Antioxidant and Cytotoxic Activities of Hot Water and Ethanol Extracts From Caesalpinia sappan

Antibacterial, antioxidant and cell proliferative properties of Coccinia grandis fruits.

Little knowledge is available on the antimicrobial and antioxidant properties of Coccina grandis fruits and no study has reported on its cell proliferative property. The aim of this study was to examine the antimicrobial, antioxidant and cell proliferative property of fruits of C. grandis. Fruits of C. grandis were extracted using water; ethanol and acetone by cold and hot Soxhlet extraction. The antibacterial activities of the extracts were tested against Staphylococcusaureus,Enterococcusfaecalis,Escherichiacoli and Pseudomonasaeruginosa using the modified Kirby-Bauer diffusion method and compared against erythromycin. The antioxidant property was determined using Cayman's antioxidant assay; whereas cell proliferation/cytotoxic properties were evaluated using the Cell Titer 96 Aqueous One Solution Cell MTS assay with MDA-MB 321 breast cancer cells. Data were analyzed for correlation and differences using unpaired student's t-test and one-way ANOVA. A p value of <0.05 was considered statistically significant. Both cold and hot ethanol and acetone extracts of C. grandis fruits showed some degree of bacterial growth inhibition. Acetone extracts exhibited higher antibacterial activity. Both ethanol extracts showed antioxidant property when compared with standard Trolox. In contrary to cytotoxicity, all four extracts showed cell proliferation compared to controls at different concentrations. However, acetone extracts exhibited greater cell proliferation compared to ethanol extracts and cold extracts performed better than the hot extracts. C. grandis fruits exhibited some degree of antimicrobial, antioxidant and cell proliferative properties. Further investigation is warranted to isolate, confirm and characterize phytochemicals that are responsible for the medicinal properties observed.

Rosehip inhibits xanthine oxidase activity and reduces serum urate levels in a mouse model of hyperuricemia.

Rosehip, the fruit of Rosa canina L., has traditionally been used to treat urate metabolism disorders; however, its effects on such disorders have not been characterized in detail. Therefore, the present study investigated the effects of hot water, ethanol and ethyl acetate extracts of rosehip on xanthine oxidase (XO) activity in vitro. In addition, the serum urate lowering effects of the rosehip hot water extract in a mouse model of hyperuricemia (male ddY mice, which were intraperitoneally injected with potassium oxonate) were investigated. Furthermore, the influence of rosehip hot water extract on CYP3A4 activity, which is the most important drug-metabolizing enzyme from a herb-drug interaction perspective, was investigated. Rosehip extracts of hot water, ethanol and ethyl acetate inhibited XO activity [half maximal inhibitory concentration (IC50) values: 259.6±50.6, 242.5±46.2 and 1,462.8±544.2 µg/ml, respectively]. Furthermore, the administration of 1X rosehip hot water extract significantly reduced the levels of serum urate at 8 h, which was similar when compared with the administration of 1 mg/kg allopurinol. Rosehip hot water extract only marginally affected CYP3A4 activity (IC50 value, >1 mg/ml). These findings indicate that rosehip hot water extract may present as a functional food for individuals with a high urate level, and as a therapeutic reagent for hyperuricemic patients.

Antioxidant Activities of Hot Water and Ethanol Extracts from the stem of Sorbus commixta Heal

Antioxidant Activities of Hot Water and Ethanol Extracts from the stem of Sorbus commixta Heal

식물화합물 다량 함유 제주조릿대 잎 추출물의 제조와 특성

Sasa species leaves have been used in traditional medicine for their anti-inflammatory, antipyretic, and diuretic properties. Sasa quelpaertensis Nakai is a small bamboo grass that grows only on Mt. Halla on Jeju Island, Republic of Korea. This small bamboo grass has recently been the focus of much attention due to its potential biomass as well as its beneficial health effects. In this study, to promote the efficient utilization of the S. quelpaertensis leaf, we established a simple preparation method for phytochemical-rich extract (PRE) by comparing phytochemical contents and biological activities according to extraction methods. high performance liquid chromatography (HPLC) analysis revealed that the contents of two major phytochemicals such as, tricin (5.35 mg/g) and p-coumaric acid (44.10 mg/g) contained in PRE were higher than those in fresh hot water extract (SQH, p-coumaric 23.39 mg/g, tricin 0.18 mg/g) and ethanol extract (SQE, p-coumaric 10.8 mg/g, tricin 0.38 mg/g). The antioxidant activities [1,1-diphenyl-2-picrylhydrazy (DPPH) radical scavenging activity, 2,2-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS) radical scavenging activity, nitric oxide (NO) scavenging activity, and xanthine oxidase inhibitory activity] of PRE were higher than those of SQH and SQE. PRE effectively inhibited NO production in LSP- stimulation RAW 264.7 cells, and the growth of human promyelocytic leukemia (HL-60) cells. These results suggest that PRE has a potential as a promising antioxidant and anti-inflammatory agent.

수확시기에 따른 함초의 항산화 및 항혈전 활성의 변화

In Korea, the aerial parts of the halophyte Salicornia europaea, known as hamcho, are used in salads in April–June and in oriental medicine in September–October In this study, with the aim of developing functional foods to aid blood circulation, hot water extract (HWE) and ethanol extract (EE) were prepared using hamcho harvested from the fields of Shinan, Jeonnam, Korea on 5th April (HWE-04, EE-04), 5th July (HWE-06, EE-06), 5th August (HWE-08, EE-08), 5th September (HWE-09, EE-09), and 5th October (HWE-10, EE-10), and their antioxidant and antithrombosis activities were evaluated. Among the HWEs, HWE-10 showed the highest concentration of total polyphenols and total flavonoids (22.4 and 17.6 mg/ml, respectively), and EE-09 had the highest concentration among the EEs (20.1 and 19.3 mg/ml, respectively). Among the HWEs and EEs, HWE-08 and EE-08 had the highest total sugar and reducing sugar content. In the antioxidation assay, HWE-10 and EE-09 showed strong reducing power, as well as DPPH, ABTS, and nitrite scavenging activities. The calculated RC50s of EE-09 against DPPH, ABTS, and nitrite were 578, 277, and 68.8 μg/ml, respectively. The antithrombosis activity assay revealed that HWE-04, HWE-06, EE-04, and EE-06 had anticoagulation activity against coagulation factors and that HWE-08, HWE-09, EE-08, and EE-09 expressed strong thrombin inhibitory activity, which was comparable to the antithrombosis activity of aspirin. In addition, EE-06 and HWE-08 exhibited strong aggregation inhibitory activities against human platelets. The results suggest that extract from hamcho harvested in particular periods and prepared using a defined solvent has strong potential as a novel food ingredient and an antioxidant and antithrombosis agent.

Antioxidant Activity and Proline Content in Hot Water, Ethanol, and Methanol Extracts of Sweet Potato Varieties

Antioxidant Activity and Proline Content in Hot Water, Ethanol, and Methanol Extracts of Sweet Potato Varieties

Antimicrobial effects of Citrus sinensis peel extracts against dental caries bacteria: An in vitro study.

BackgroundEthnomedicine is gaining admiration since years but still there is abundant medicinal flora which is unrevealed through research. The study was conducted to assess the in vitro antimicrobial potential and also determine the minimum inhibitory concentration (MIC) of Citrus sinensis peel extracts with a view of searching a novel extract as a remedy for dental caries pathogens.Material and MethodsAqueous and ethanol (cold and hot) extracts prepared from peel of Citrus sinensis were screened for in vitro antimicrobial activity against Streptococcus mutans and Lactobacillus acidophilus, using agar well diffusion method. The lowest concentration of every extract considered as the minimal inhibitory concentration (MIC) values were determined for both test organisms. One way ANOVA with Post Hoc Bonferroni test was applied for statistical analysis. Confidence level and level of significance were set at 95% and 5% respectively.ResultsDental caries pathogens were inhibited most by hot ethanolic extract of Citrus sinensispeel followed by cold ethanolic extract. Aqueous extracts were effective at very high concentrations. Minimum inhibitory concentration of hot and cold ethanolic extracts of Citrus sinensis peel ranged between 12-15 mg/ml against both the dental caries pathogens.ConclusionsCitrus sinensispeels extract was found to be effective against dental caries pathogens and contain compounds with therapeutic potential. Nevertheless, clinical trials on the effect of these plants are essential before advocating large-scale therapy. Key words:Agar well diffusion, antimicrobial activity, dental caries, Streptococcus mutans, Lactobacillus acidophilus.