Concentration Of Extract Research Articles

Dereplication tools for Rhizophora mangle extracts from different mangrove areas and their potential against Staphylococcus aureus.

Rhizophora extracts have several potential biological activities, and their metabolites can be used in the pharmaceutical industry. Extracts of Rhizophora species obtained from mangroves have shown prospective activity against Staphylococcus aureus. This study aimed to investigate the chemical profile of Rhizophora mangle leaves from fringe, basin, and transition mangrove zones and their bactericidal/bacteriostatic potential against S. aureus. R. mangle leaves were collected monthly in 2018 from litterfall in three different zones of the mangrove of Guaratiba State Reserve: fringe, basin, and transition. Extracts were prepared from the material collected in October and December for LC-HRMS/MS analysis, and dereplication was performed using a molecular library search and the classical molecular networkingGNPS platform. The minimum inhibitory concentrations (MICs) of the aqueous extract of R. mangle against S. aureus were determined. No S. aureus growth was observed compared to the control for extracts collected from September to December. Different compounds were annotated in each region, yet a marked presence of phenolic compounds was noted, among them glycosylated flavonoid derivatives of quercetin and kaempferol. The results suggest bactericidal/bacteriostatic activity for extracts of R. mangle leaves collected in 2018 from three mangrove forest zones.

Coffee Extract as a Natural Antioxidant in Fresh Pork Sausage-A Model Approach.

Consumers are increasingly looking for healthy foods without the addition of synthetic additives. The aim of this study was to evaluate the efficiency of coffee extracts as a natural antioxidant in fresh pork sausage. Firstly, the conditions for obtaining coffee green extracts were optimized (Central Composite Rotatable Design 23, variables: extraction time, ethanol-water ratio, and sample-solvent ratio) in an ultrasound bath (70 °C). The response variables were the bioactive compounds levels and antioxidant activity. Valid models were obtained (p ≤ 0.05, R2 > 0.751), with higher bioactive content and antioxidant activity in the central point region. Extracts of Robusta and Arabica coffee green (RG and AG) and medium roast (RR and AR) obtained, and central point (10 min, an ethanol concentration of 30%, and a sample-solvent ratio of 10 g/100 mL) and optimized (14.2 min, 34.2%, and 5.8 g/100 mL) parameters were characterized. The RG presented a significantly (p ≤ 0.05) higher content of caffeine (3114.8 ± 50.0 and 3148.1 ± 13.5 mg/100 g) and 5-CQA (6417.1 ± 22.0 and 6706.4 ± 23.5 mg/100 g) in both extraction conditions, respectively. The RG and RR coffee presented the highest antioxidant activity. Two concentrations of RG and RR coffee extracts were tested in fresh pork sausage. The Robusta coffee extract presented the highest antioxidant activity in both roasted and green states. However, when applied to a meat product, the extract prepared with RG coffee showed better results, with efficiency in replacing synthetic antioxidants (content of malonaldehyde/kg of sample below 0.696 ± 0.059 in 20 days of storage), without altering the sensory attributes of the product (average scores above 7.16 ± 1.43 for all attributes evaluated). Therefore, the RG coffee extract was a suitable alternative as a natural antioxidant applied to fresh pork sausage.

Characterization of polyvinyl alcohol and vitex negundo blended bio nanofilm for wound healing scaffold

Polyvinyl alcohol blended nanofilms have shown great promise as a material for wound healing applications because of their biocompatibility, biodegradability, and antibacterial characteristics. This article has typically utilized electrospinning to create a scaffold for wound healing meanwhile investigating the characteristics of the polyvinyl alcohol (PVA) and vitex negundo (VN) blend nanofilm. The PVA concentrations were kept at 10% Weight/Volume (W/V), which was then mixed with VN solution at various volumetric ratios and electrospun into nanofilms. Field Emission Scanning Electron Microscopy (FESEM) was used to determine and analyze the nanofiber diameter. The plant extract concentration and the viscosity of the electrospinning solution influenced the fiber diameter to grow from 120.32 nanometers (nm) to 171.11 nanometers (nm). Fourier Transform Infrared Spectroscopy (FTIR) verifies the interaction between plant extract and PVA and records a new peak between 1731 and 1750 cm−1, which represents the production of the ester group. The swellability of the developed sample was studied which is negligibly reduced when the plant extract was added. In comparison to both Gram-positive and Gram-negative bacteria, the pure plant extract and composite nanofibrous web demonstrated greater antibacterial activity. PVA-blended nanofilms can promote cell migration, proliferation, and differentiation, hence promoting wound healing by creating a moist environment.

Assessment of in vitro Anti-inflammatory and Anti-acne-inducing Bacterial Activities of Kameng (Eclipta prostrata Linn.) Cultivated in Suphan Buri Province, Thailand

This research investigates extracts from Kameng (Eclipta prostrata Linn.), originally employed in traditional medicinal recipes, with the aim of developing an extract that can serve as an alternative to antibiotics. For this purpose, the anti-inflammatory and anti-acne-inducing bacterial activities of Kameng crude ethanol extract, grown in Suphan Buri Province were investigated, with anti-inflammatory properties assessed by the inhibition of protein degradation and proteinase inhibitory assays. Findings indicated the potential of Kameng extracts as anti-inflammatory drugs that reduce protein degradation and proteinase activities. Kameng extract concentrations ranging from 0.4 to 4.0 x 104 ppm inhibited protein degradation and proteinase activity by 14.66%-50.75% and 28.57%-72.08%, respectively. The agar disc diffusion method revealed that Kameng extracts had strong inhibitory effects against S. aureus and C. acnes, with inhibition zone diameters of 31.15±0.47 and 37.28±0.47 mm, respectively. The minimal inhibitory concentration (MIC) of Kameng extract against S. aureus and C. acnes was 5.0 mg/mL and 2.5 mg/mL while minimal bactericidal concentration (MBC) of Kameng extract against S. aureus and C. acnes was 20.0 mg/mL and 10.0 mg/mL, respectively. Results suggested the potential of Kameng extract to cure acne and skin inflammation as a herbal cosmetic product.

Phytomediated stress modulates antioxidant status, induces overexpression of CYP6M2, Hsp70, α-esterase, and suppresses the ABC transporter in Anopheles gambiae (sensu stricto) exposed to Ocimum tenuiflorum extracts.

The incorporation of phytoactive compounds in the management of malarial vectors holds promise for the development of innovative and efficient alternatives. Nevertheless, the molecular and physiological responses that these bioactive substances induce remain underexplored. This present study investigated the toxicity of different concentrations of aqueous and methanol extracts of Ocimum tenuiflorum against larvae of Anopheles gambiae (sensu stricto) and unraveled the possible underlying molecular pathways responsible for the observed physiological effects. FTIR and GCMS analyses of phytoactive compounds in aqueous and methanol crude extracts of O. tenuiflorum showed the presence of OH stretching vibration, C = C stretching modes of aromatics and methylene rocking vibration; ring deformation mode with high levels of trans-β-ocimene, 3,7-dimethyl-1,3,6-octatriene in aqueous extract and 4-methoxy-benzaldehyde, 1,3,5-trimethyl-cyclohexane and o-cymene in methanol extract. The percentage mortality upon exposure to methanol and aqueous extracts of O. tenuiflorum were 21.1% and 26.1% at 24 h, 27.8% and 36.1% at 48 h and 36.1% and 45% at 72 h respectively. Using reverse transcription quantitative polymerase chain reaction (RT-qPCR), down-regulation of ABC transporter, overexpression of CYP6M2, Hsp70, and α-esterase, coupled with significantly increased levels of SOD, CAT, and GSH, were observed in An. gambiae (s.s.) exposed to aqueous and methanol extracts of O. tenuiflorum as compared to the control. Findings from this study have significant implications for our understanding of how An. gambiae (s.s.) larvae detoxify phytoactive compounds.

In Rodents, Methanol Extract from Ritchiea capparoides leaf has Analgesic, Anti-Inflammatory, and Antipyretic Properties

Background: Ritchiea capparoides leaves are traditionally used in Southern Nigeria to cure fever, snake bites, aches, and malaria. Consequently, the analgesic, anti-inflammatory, and antipyretic properties of Ritchiea capparoides leaf ethanol extract were assessed in rodents in this work. Methods: Using acetic acid and tail immersion models in mice, the analgesic effect was investigated, and xylene, egg-albumen, brewer's yeast, and dinitrophenol models were used to investigate the anti-inflammatory and antipyretic properties in mice and rats at doses of 125 mg/kg, 250 mg/kg, and 500 mg/kg of the methanol extract. The plant's leaf extract was also subjected to oral acute toxicity testing and phytochemical screening. Results: At p<0.05 and p<0.01, the methanol leaf extract and the common medication (aspirin) considerably reduced the amount of writhes brought on by acetic acid. The reaction times of the tested agent's standard and extract groups significantly increased. The extract significantly reduced oedema in the egg-albumin-induced paw oedema model, with dose-related inhibition of p<0.05 and p<0.01, similar to aspirin. When compared to dexamethasone, Ritchiea capparoides leaf extract likewise showed a significant p<0.05 and p<0.01 effect in the xylene-induced mouse ear oedema test. Rats with pyrexia caused by dinitrophenol and Brewer's yeast both showed a statistically significant decrease in rectal temperatures. Alkaloids, saponins, tannins, flavonoids, terpenoids, steroids, and cardiac glycosides are all present in the methanol leaf extract. It was discovered that the oral acute toxicity testing were more than 5000 mg/kg. Conclusion: The findings supported the traditional use of R. capparoides as a medicine by demonstrating the plant's possible analgesic, anti-inflammatory, and antipyretic properties at the tested concentrations of methanol leaf extract.

Antibacterial Test of Cherry Leaves Ethanol Extract (Muntingia calabura L.) Against Streptococcus mutans

Introduction: Streptococcus mutans is a bacteria that plays an important role in the occurrence of dental caries. Use of antibiotics to treat infections Streptococcus mutans often causes side effects. Cherry leaves (Muntingia calabura L.) contain active compounds that have the potential to have antibacterial effects. This research aims to determine the inhibitory power of cherry leaf ethanol extract against Streptococcus mutans in vitro. Methods: This research uses an experimental method with a post-test-only control group design. Cherry leaf ethanol extract was made by maceration method using 96% ethanol solvent for 5 days. The antibacterial test was carried out using the paper disc diffusion method with varying concentrations of cherry leaf extract, namely 20%, 40%, and 60% w/v dissolved in 10% DMSO. The positive control used was the amoxicillin antibiotic disc, while the negative control used 10% DMSO. Results: The results of the antibacterial test of the ethanol extract of cherry leaves in this study showed that at a concentration of 20% it had an average inhibitory power of 9.16 mm, the extract with a concentration of 40% had an inhibitory power of 11.33 mm, and at a concentration of 60% it had an inhibitory power of 12. 16mm. The positive control amoxicillin had an inhibitory power of 18.67 mm. Conclusion: Cherry leaf ethanol extract has potential as an alternative therapy to overcome Streptococcus mutans bacterial infections.

Evaluation of phytochemical, in vitro antibacterial and rate of kill assay of <i>Terminalia avicennioides</i> leaf against some bacteria associated with diarrhoea

The study was aimed to evaluate the phytochemical constituents, in vitro antibacterial and rate of kill assay of Terminalia avicennioides leaf extract against some bacteria associated with diarrhoea. The phytochemical constituents of the ethanol of Terminalia avicennioides leaf, aqueous, n- butanol, and ethyl acetate fractions of the leaf extract were determined using standard analytical methods. The antibacterial activities of the leaf extract and extract fractions against clinical isolates of Salmonella Typhimurium and Escherichia coli isolated from diarrhoeaic patients were determined in vitro by agar diffusion, dilution and time - kill methods. The result of phytochemical screening revealed the presence of carbohydrates, cardiac glycosides, saponins, flavonoides, tannins, alkaloids, phenols and triterpenes. The crude extract and extract fractions of T. avicennioides leaf were effective against the test bacterial isolates at varied concentration of extracts but the n-butanol fraction was more effective with Minimum inhibitory and Minimum Bactericidal Concentration of 6.25 and 12.5mg/ml. The clinical isolates of E. coli and S. Typhimurium were completely killed within 180 minutes of exposure to ethanol leaf extract and extract fractions at varied MBCs of 12.5 mg/ml and 25.0 mg/ml. The clinical isolates of E. coli and S. Typhimurium were more susceptible to n-butanol fraction within 120 minutes of exposure to the extract fraction.

Synthesis of TiO2 Nanoparticles by Green Approach: Application as Photoanode for Dye-Sensitized Solar Cells

Efficient photoanodes play a central role in the performance of dye-sensitized solar cells. Traditional methods for synthesizing TiO2 often involve chemical processes that can be expensive and environmentally harmful due to the use of toxic and hazardous substances. Therefore in this work, TiO2 nanoparticles (NPs) were synthesized using bio-inspired processing through a hydrothermal procedure using different concentrations of Aloe barbadensis miller leaves extract as the reducing and stabilizing agent. Scanning electron microscopy (SEM), UV–vis spectroscopy (UV), X-ray difraction (XRD), Raman Spectroscopy, transmission electron microscopy (TEM) and Brunauer–Emmett–Teller (BET) analysis were used to characterize as synthesized TiO2 NPs. DSSCs were fabricated employing the prepared TiO2 NPs as photoanodes, and their performance was assessed. DSSC generates JSC of 9.7 mA/cm2, VOC of 0.682 V and efficiency (η) of 4.3 % when 20 mL concentration of extract was used for the synthesis of TiO2 NPs and subsequently their photoanodes.

In vitro inhibition of Fusarium spp. isolated from bean crop using Argemone ochroleuca extract

Species of the genus Fusarium are the main cause of root rot in bean crops, resulting in yield losses of up to 50%. Synthetic fungicides are the primary tools for their control; however, they cause environmental damage. The objective of this study was to evaluate the effect of extracts from A. ochroleuca on Fusarium spp. under in vitro conditions. During the spring-summer 2022 growing season, plants exhibiting symptoms of wilting and vascular browning were collected. The isolated fungi were purified through monosporic cultures and hyphal tip techniques, and their morphological characteristics were characterized. To determine growth inhibition, a poisoned medium methodology was employed, evaluating two concentrations of extracts (13% and 23%) in both ethanol and aqueous mediums. The obtained isolates corresponded to the morphological characteristics of Fusarium. The extract volumes that showed 100% inhibition were the 23% concentration in both ethanol and aqueous mediums. The 13% ethanol extract exhibited inhibition ranging from 29% to 62% between the first and tenth day of incubation. The 13% aqueous extract displayed inhibition ranging from 25% to 43%. The Argemone ochroleuca extract demonstrates antifungal properties against Fusarium spp. isolated from beans.

Fabrication of sustainable, antioxidant, and antibacterial PVA nanomembranes loaded with plant extracts for dermal applications

Nanotechnology is unfolding its enormous abilities due to its unique attributes, such as large surface area, increased entrapment sites, and high surface energy. Similarly, nanotechnology-based products are replacing conventional ones due to their superior effectiveness. We have developed a dry, biocompatible, anti-oxidative, and antibacterial electrospun nanomembranes loaded with Cucumber (c. sativus) and Aloe vera (a.b miller) extract into polyvinyl alcohol (PVA) that can be utilized as dermal/skin patch. Various physiochemical characterizations are performed, such as scanning electron microscope (SEM), drug release, hydrophilicity, biocompatibility, antioxidant, and antibacterial activity on the developed membranes to ensure their productivity. Optimal nanofiber diameters were determined to be 396nm and 371nm at 8% wt./wt. and 100% extract concentration. The average particle size of extracts was 155 & 177nm, as determined by the Zeta sizer. The hydrophilicity of all developed nanomembranes is confirmed by having a water contact angle (WCA) of <60° and water absorption exceeding 550%. In addition, the nanomembranes exhibit burst drug release of > 72%, excellent biocompatibility, up to 92.8% cell viability, 86% anti-oxidative activity, and 99.8% effectiveness against Staphylococcus aureus (S. aureus) bacteria. Lastly, nanomembranes can withstand a tensile strength of 53.88N, an elongation of 1.72%, and an air permeability of 16.98mm/sec, making them an ideal choice for multipurpose cosmetic/skin patches.

Streptomyces isolate SOM013, a potential agent against microbial resistance and gastric ulcers

The menace of microbial resistance and re-emerging disease is still a problem for healthcare givers globally, and the need for newer sources of potent antibiotics has become paramount. This study investigated the antimicrobial and antiulcer activities of Streptomyces isolate SOM013. Streptomyces isolates were cultivated and purified following standard microbiological protocols. Secondary metabolites were recovered and characterized from Streptomyces isolate SOM013 via broth fermentation and extraction. Varying concentrations (0.5 mg/mL, 0.025 mg/mL and 0.0125 mg/mL) of the SOM013 extract were used for antimicrobial screening against resistant bacteria and medically important fungi (methicillin-resistant Escherichia coli, Oxacillin resistant Helicobacter pylori, Shigella spp, extended broad-spectrum resistant Pseudomonas aeruginosa, Streptococcus spp, Campylobacter spp, Candida albicans, Aspergillus niger, and Aspergillus flavus). The antiulcer activity of the SOM013 was also examined in a methanol-induced gastric ulcer animal model. A total of 23 Streptomyces spp were recovered from the study. Methanolic extract of the SOM013 isolates was more potent across the clinical test microorganisms compared to water extract. The antimicrobial activity was dose dependent, with methanolic extract at 0.05 g/mL displaying the highest zone of inhibition (18.8 ± 0.3 mm) when tested against extended broad-spectrum resistant Pseudomonas aeruginosa. Further, the extract's ulcer index and protection efficacy were significant as the concentration increased (P < 0.01). SOM013 isolate has a moderate antimicrobial and high antiulcer activity worthy of pharmacological exploration.

Celastrus paniculatus seeds as a green corrosion inhibitor for stainless steel in H2SO4 acidic solution

Corrosion poses a significant threat to the durability and safety of metallic structures, particularly in aggressive environments such as sulfuric acid solutions. In this study, the corrosion inhibition performance of Celastrus paniculatus for steel in 0.5 M H2SO4 is investigated. Celastrus paniculatus, a natural plant extract known for its potential corrosion-inhibitive properties, is explored as a green alternative to synthetic inhibitors.The experimental methodology involves the immersion of steel specimens in 0.5 M H2SO4 solutions containing various concentrations of Celastrus paniculatus extract. Electrochemical techniques, such as potentiodynamic polarization and electrochemical impedance spectroscopy, assess corrosion inhibition efficiency. Surface analysis techniques, i.e., scanning electron microscopy (SEM), were employed to investigate the steel surfaces' morphological changes and elemental composition also Quantum Chemical Computations were conducted to find the energy levels of the Lowest Unoccupied Molecular Orbital (ELUMO) and Highest Occupied Molecular Orbital (EHOMO) and the energy gap (ΔE) between HUMO and LUMO from the optimized structure to find of which phytochemical absorb on the surface of the metal and this, we can clear that lower energy containing phytochemical will absorb more on the metal surface and have their greater efficiency. The study contributes to the development of environmentally friendly and sustainable corrosion inhibitors for steel in corrosive media, with potential applications in various industrial sectors. In metallic industries during acid cleaning or pickling processes metal undergoes acidic corrosion. This acidic corrosion can be prevented by many ways including alloying or dealloying of metals, anodic and cathodic protection or application of inhibitors. In this study, we have used the Celastrus paniculatus seed extract. Although its medicinal applications were explored but it was not used as a anticorrosive agent. So here we have determined the anticorrosive effects of Celastrus paniculatus seed in 0.5 M H2SO4 and used this as a novel and highly effective during acid cleaning.

Hymenoptera venom immunotherapy: Safety and efficacy of an accelerated induction regimen with depot aluminum adsorbed extracts.

Introduction: Hymenoptera venom immunotherapy (VIT) is the only therapy that protects patients with Hymenoptera venom allergy by preventing systemic reactions after a new sting. Various extracts for VIT are available and used. VIT administration consists of an induction phase and a maintenance phase. Depot preparations of Hymenoptera VIT extracts are typically used for cluster and conventional protocols, and the maintenance phase. Many patients with Hymenoptera allergy need to achieve tolerance quickly because of the high risk of re-sting and possible anaphylaxis. Objective: Our study aimed to show the safety and efficacy of an accelerated regimen with depot preparations on aluminum hydroxide by using relatively high starting doses in a heterogeneous group of patients. Methods: The research focused on a group of patients with a history of severe systemic reactions to Hymenoptera stings, with the necessity of swift immunization due to high occupational risks. Aluminum hydroxide depot extracts either of Vepula species or Apis mellifera extracts were used. Results: The induction protocol was started with the highest concentration of depot venom extract of 100,000 standard quality unit and was well tolerated by 19 of 20 patients. Onne patient presented with a mild systemic reaction during the accelerated induction schedule, which was promptly treated with intravenous steroids and intramuscular H1 antihistamine; when switched to a conventional induction protocol, he had a similar reaction but finally reached maintenance with an H1-antagonist premedication. Conclusion: If validated, the accelerated induction protocol by using depot aluminum adsorbed extracts with the highest concentration of venom from the beginning could offer a streamlined and accessible treatment modality for patients diagnosed with anaphylaxis from bee and wasp venoms in need of rapid desensitization.

A Study of the Antioxidizing and Inhibiting Effects of the Alcoholic Extract of Sage Salvia Officinalis on Microorganisms

Objectives: A study of the antioxidizing and inhibiting effects of the sage salvia officinalis on microorganisms. Methods: Chemical constituents of sage leaves the percentage of the 98% ethanol extract of sage was 5.8% prepared in concentrations of 50, 100, 150 and 200 mg/ml, Antioxidizing and inhibiting effects on microorganisms, and sensory characteristics of the sage added biscuits. Results: Scanning electron microscope images, the structure of powder sage leaves which appear as long tubes and round crystals, Hight percent concentration of minerals carbon and oxygen while low concentrations of (Zn, Al, Na, Mg, Si, K, Co, Ca, and Ce) were also found. the percentage of the moisture, protein, fat and ash (11.09, 6.89, 13.14, 9.64) % respectively, the inhibition effect of sage leaves ethanol extract prepared in concentrations of 50, 100, 150 and 200 mg/ml on three bacteria and fungi species of disc method. maximum effect on all three bacteria species Escherichia coli, Staphylococcus aureus and Pseudomonas sp. was found with the concentration 50 and 100 mg/ml. compared with 150 and 200 mg/ml. It has been found that the 150 mg/ml concentration has the most inhibition effect on the three species of fungi studied Aspergillus niger, A. carbonarius, A. flavus. All extract concentration inhibited A. flavus, it was that the antioxidant activity, iron ion bonding, reducing power and the ability capture the hydrogen peroxide of sage ethanol extract increases with high concentrations. Peroxide values decreased with increased sage added biscuits percentage (0, 0.5, 0,75 and 1) w/w% in stored for periods. However, the sensory characteristics of the sage added biscuits samples were good and close to the standard biscuit control. Conclusions: Finally, we conclude that the sage plant has medicinal and nutritional benefits due to its antioxidant and antimicrobial activity.

Effect of Ginger (Zingiber officinale) Extracts on Mechanical and Antimicrobial Properties of Ganyong Starch Edible Films as Primary Packaging of Crabstick

Research has been conducted on the effect of ginger (Zingiber officinale) extract addition in the combination of an edible film made from Ganyong starch, sorbitol and chitosan. This study aims to analyze whether this formulation can be used as a substitute packaging for crabsticks that have been using conventional plastic packaging. By using a variation of ginger extract concentrations of 0, 3%, 6% and 9% into 3 % Ganyong starch, 4 % sorbitol and 0.3 % chitosan (w/v). Mechanical characteristics were carried out in the form of tensile strength, elongation, young modulus, swelling, moisture content, thickness, and solubility test. Antimicrobial ability and DSC (Differential scanning calorimetry) for the thermal properties of the casted film were also conducted. Data was analyzed using One-way Anova SPSS version 29 with Turkey’s test. The addition of ginger extract to edible films based on Ganyong starch, sorbitol and chitosan can be used as primary packaging for crabsticks. The best formulation was found in the 6 % ginger extract variation with the results of swelling (95 %), moisture content (13 %), elongation (76 %), and antimicrobial properties of Escherichia coli (7.5 mm) and Bacillus cereus (6.9 mm). In addition, the melting temperature (Tm) of 6 % ginger extract concentration was also higher (134 °C), yet was not significantly different from the other variations. Therefore, this formulation has the potential as an alternative primary crabstick packaging. HIGHLIGHTS Preparation of edible film from 3 % Ganyong starch, 4 % sorbitol, 0.3 % chitosan with fixed concentration and 3 different variations of ginger extract concentration (0, 3, 6, and 9 %), respectively. Casting method of edible film as primary packaging of crabsticks Mechanical properties and antimicrobial activity against Bacillus cereus and Escherichia coli, gram-positive and gram-negative bacteria, respectively The 6 % ginger extract variation showed better results with elongation (76 %), moisture content (13 %), swelling (95 %), and antimicrobial properties of coli (7.5 mm) and B. cereus (6.9 mm) GRAPHICAL ABSTRACT

Marine Microalgae Schizochytrium sp. S31: Potential Source for New Antimicrobial and Antibiofilm Agent.

The rise of antibiotic-resistant bacteria necessitates the discovery of new, safe, and bioactive antimicrobial compounds. The antibacterial and antibiofilm activity of microalgae makes them a potential candidate for developing natural antibiotics to limit microbial infection in various fields. This study aimed to analyze the antibacterial effect of the methanolic extract of Schizochytrium sp. S31 microalgae by broth microdilution and spot plate assays. The antibacterial effects of Schizochytrium sp. S31 extract was studied on gramnegative pathogens, Pseudomonas aeruginosa, Escherichia coli 35218, Klebsiella pneumonia, which cause many different human infections, and the gram-positive pathogen Streptococcus mutans. At the same time, the antibiofilm activity of the Schizochytrium sp. S31 extract on Pseudomonas aeruginosa and Escherichia coli 35218 bacteria were investigated by crystal violet staining method. Schizochytrium sp. S31 extract at a 60% concentration for 8 hours displayed the highest antibacterial activity against P. aeruginosa, E. coli 35218, and K. pneumonia, with a decrease of 87%, 92%, and 98% in cell viability, respectively. The experiment with Streptococcus mutans revealed a remarkable antibacterial effect at a 60% extract concentration for 24 hours, leading to a notable 93% reduction in cell viability. Furthermore, the extract exhibited a dose-dependent inhibition of biofilm formation in P. aeruginosa and E. coli 35218. The concentration of 60% extract was identified as the most effective dosage in terms of inhibition. This research emphasizes the potential of Schizochytrium sp. S31 as a natural antibacterial and antibiofilm agent with promising applications in the pharmaceutical sectors. This is the first study to examine the antibacterial activity of Schizochytrium sp. S31 microalgae using broth microdilution, spot plate assays, and the antibiofilm activity by a crystal staining method. The findings of this study show that Schizochytrium sp. S31 has antibacterial and antibiofilm activities against critical bacterial pathogens.

Formulation and Determination of Tannin and Flavonoid Levels of Anti-Acne Gel Formulation from Red Betel Leaf Extract (Piper crocatum)

Acne is a common skin condition that often occurs among teenagers and adults aged 18-23 years. Acne can be triggered by several factors, genetic, psychological, weather, stress, cosmetics, and bacterial infections. In addressing the problem of acne, a good dosage form to use is a gel preparation. Acne skin care by utilizing natural ingredients, one of which is red betel leaf. Red betel leaf contains phytochemical compounds, namely tannins and flavonoids, which function as antibacterial agents. The formulation of anti-acne gel is designed by varying the concentration extract, F0 (0%), F1 (10%), F2 (15%), and F3 (20%), with the aim of determining the best anti-acne gel formulation. Red betel leaf extract is tested for tannin and flavonoid levels using the UV-Vis Spectrophotometer test method. The gel preparation is examined, including organoleptic testing, pH testing, homogeneity testing, and spreading testing. The research results show that red betel leaf extract has a tannin content of 4.7056% and a flavonoid content of 0.0934%. The results of the anti-acne gel preparation study meet the requirements for organoleptic properties, pH, homogeneity, and spreading. Based on the results of various concentrations of extract, satisfactory results are obtained, with formulations F2 and F3 meeting the requirements.Acne; Gel; Extract; Piper crocatum

Efficiency of Citrus limon L. Ripe Peel Extract In The Control of Raoiella indica (HIRST, 1924) (Prostigmata: Tenuipalpidae)

Purpose: This study aimed to evaluate the acaricidal potential of the aqueous extract obtained from the ripe peels of Citrus limon on adults of Raoiella indica. Theoretical Reference: R. indica is a phytophagous mite that primarily attacks plants of the Arecaceae family. As it is considered a relatively new pest in Brazil, there are few control methods available, with synthetic chemical control being the primary one. Method: The ripe peels of C. limon were dried and ground into a fine powder, which was used to formulate extract concentrations of 0.00, 1.00, 1.64, 2.70, 4.44, 7.30, and 12.00%. The extracts were sprayed on 12 adult females of R. indica per experimental unit, with 7 repetitions for each concentration. Mortality was assessed at 24, 48, and 72 hours after spraying. Results and Conclusion: The mortality of R. indica increased as the concentrations of the ripe peel extract of C. limon increased, reaching 88% for the highest concentration after 72 hours of application. Research Implications: The aqueous extract of ripe peels of C. limon demonstrated acaricidal efficiency against R. indica under controlled conditions. Originality/Value: This work adds value to the study of alternative methods of agricultural pest control, as a means of promoting more economically and ecologically sustainable management.

Testing The Antimicrobial Effectiveness of Manila Sauce Leaves (Manilkara Zapota L) against Bacteria Escherichia Coli: In Vitro Study

Diarrhea remains a significant public health concern globally, particularly affecting children under five years old. Traditional herbal remedies, including Manila Sapodilla (Manilkara zapota L) leaves, have been utilized in Indonesia for treating diarrhea due to their perceived efficacy and safety. This in vitro study aimed to assess the antimicrobial effectiveness of Manila Sapodilla leaf extract against Escherichia coli bacteria, a common cause of diarrhea. True experimental design was employed, utilizing various concentrations (25%, 50%, 75%, and 100%) of Manila Sapodilla leaf extract. The extract was obtained through maceration using ethanol followed by dilution with distilled water. Antimicrobial activity was evaluated using the Kirby-Bauer diffusion method, measuring inhibition zones formed around Escherichia coli colonies. Results demonstrated that Manila Sapodilla leaf extract exhibited inhibitory effects against Escherichia coli at all tested concentrations, albeit with varying degrees of effectiveness. The inhibition zones ranged from 5.37 mm to 8.53 mm, indicating resistance. Positive control using Ciprofloxacin displayed a significantly larger inhibition zone (21.75 mm), indicating sensitivity. These findings suggest the potential of Manila Sapodilla leaf extract as an alternative treatment for Escherichia coli infections. However, further research, including phytochemical analysis and exploration of different extraction methods and concentrations, is warranted to elucidate its therapeutic potential fully. This study contributes to the ongoing search for alternative herbal-based antibiotics to combat bacterial infections effectively.