Different Concentrations Of Extract Research Articles

Kısa Süreli Hiperglisemide Prunus spinosa Tarafından Bağışıklık Sistemi ve Hemogram Parametrelerinin Modülasyonu

Diabetes mellitus (DM) is one of the chronic diseases, relationship increased blood glucose level, that requires urgent global attention due to its prevalence and associated complications. DM leads to oxidative stress that plays an important role in the development of various complications in diabetes by suppressing the immune system. Prunus spinosa is a plant that has been used in the treatment of many diseases from past to present, thanks to its high antioxidant activity. Therefore, the present study aims to research the effect of P. spinosa leaf and flower mixture on immune system during the short-term diabetic condition. In the study, 56 Wistar albino male rats divided into 7 groups, one of which control and others six diabetic groups, were used to determine the effects of P. spinosa on adenosine deaminase (ADA), (xanthine oxidase) XO and myeloperoxidase (MPO) activities in the liver tissues of diabetic rats as well as on hemogram parameters. Two of these groups were given plant extract in different concentrations (25 and 50 mg/kg bw) and the results were compared with insulin, metformin and acarbose groups. The results showed that both doses administered had a modulating effect on the changing hematological parameters caused by diabetes. Treatment groups significantly decreased ADA, XO, and MPO activities compared to diabetic group. The effects of the PSE50 were found to be more effective than all other treatment. These effects of the plant in diabetesmay be due to its therapeutic immunoregulatory potential. As a result, P. spinosa can be a valuable resource as an adjuvant on diabetes.

Antitumor Activity of Ziziphus Jujube Fruit Extracts in KG-1 and NALM-6 Acute Leukemia Cell Lines

Background: Ziziphus jujube Mill. belongs to the Rhamnaceae family. It has been reported to have a variety of biological activities such as antitumor, antioxidant, and anti-inflammatory effects. This study investigates the antiproliferative effect of Ziziphus jujube on KG-1 and NALM-6 acute leukemia cell lines.
 Materials and Methods: In this experimental study, the aqueous, ethyl acetate, and hydroalcoholic extracts of the Ziziphus jujube were prepared. Total phenolic and flavonoid components were detected because the presence of these compounds is associated with antioxidant and anticancer effects. Different concentrations of extracts were prepared, and KG-1 and NALM-6 cell lines were treated with them at 12, 24, 36, and 48 hours. Cell viability and IC50 values of the extracts were calculated using MTT assays. BD Cycle TEST PLUS DNA Kit was used for cell cycle progression analysis. Bcl2, Bax, and caspase-3 mRNA expressions were also assessed.
 Results: Cell viability decreased in a concentration-dependent manner. The best efficacy belonged to the ethyl acetate extract. Investigation of cell cycle progression demonstrated that the number of G0/G1 cells enhanced and the number of G2/M cells decreased when the ethyl acetate extract was applied in its IC50 concentration. A considerable increase in Caspase-3 and Bax and a decrease in Bcl2 gene expression were detected in molecular examination.
 Conclusion: According to our research, Ziziphus jujube ethyl acetate extract has antitumor properties on KG-1 and NALM-6 cell lines, possibly through induction of apoptosis and cell cycle regulation.

Modeling and optimization of poly(lactic acid)/poly(ℇ-caprolactone)/Nigella sativa extract nanofibers production for skin wounds healing by artificial neural network and response surface methodology models

Electrospun fibrous scaffolds have great potential for the effective treatment of wounds. Novel blend scaffolds were fabricated from poly(ℇ- caprolactone) (PCL)/poly (lactic acid) (PLA) with Nigella sativa (NS) extract in different concentrations of 10 %, 15 %, 20 %, and 25 % by one nozzle electrospinning. RSM and ANN models were used to determine optimal nanofiber. The results showed that the ANN model had average goodness values of almost 1.992 which was higher than the RSM model with an amount of 1.823. The best sample was determined with the combination of parameters such as PLA/PCL (70:29) concentration, voltage 17 kV, and flow rate 0.2 ml/h in diameter of nanofiber 410 nm by Genetic Algorithm (GA) model with cost value 0.0216 that was lower than cost value (0.0927) of ANN model. The effect of NS extract on nanofibers properties showed that loading high concentrations of NS extract in PLA/PCL polymer solutions caused a decrease in nanofibers diameter, hydrophilicity, and tensile strength. Overall, PLA/PCL/NS 25 % nanofiber was selected as an optimal web with an average diameter of 370 ± 68 nm with a young modulus 5.94 MPa. This scaffold also exhibited the highest antibacterial activity, cell attachment, and cell viability based on the MTT assay.

Effects of aqueous and ethanolic seed extract of Asparagus racemosus Linn on neurobehavioral pattern of acrylamide induced experimental Zebra fish

A neuropsychological assessment is a test that assesses how well a person's brain functions. Literacy, language use, attention, learning, processing speed, reasoning, memory, problem-solving, personality and other talents are all assessed. The purpose of this study is to assess the effects of aqueous and ethanolic seed extracts of Asparagus racemosus Linn on the neurobehavioral pattern of acrylamide-induced experimental Zebra fish. In the novel tank test, the number of top entries, top remain time, top entry latency and total distance traveled were all greater in the Asparagus racemosus Linn seed extract group than in the acrylamide group, while the number of bottom entries and bottom duration of stay were lower. In the light-dark test, group II Zebrafish treated with 0.75 mM acrylamide showed anxiety by spending less time in the light zone. In our study, Zebrafish pre-treated with aqueous and ethanolic seed extracts of different concentrations of Asparagus racemosus Linn significantly reversed. In the open field test, the Asparagus racemosus Linn seed extract at different doses significantly improved outer zone (s) and inner zone (S) times compared to the acrylamide control group. In the Y-maze test, the Asparagus racemosus Linn seed extract at different dosages exhibited a dose-influenced significant improvement in the number of entry points to new arms and the total distance walked in the maze in comparison to the acrylamide control group. When compared to the acrylamide control, the Asparagus racemosus Linn seeds extract at various doses demonstrated a significant rise in the amount of time spent in the new arm.

Antibacterial efficacy of amla leaves

The present study was carried out to evaluate antibacterial potential of methanolic extract from amla leaves via agar-well diffusion method against two gram positive ( subtilis MTCC2389, MTCC7443) and three gram negative (MTCC4821, MTCC2127, MTCC7162) strains. Susceptibility of plant extract was tested by serial microdilution method (MIC) and agar well diffusion method was determined. The extract showed maximum zone of inhibition against (17.6 mm) followed by (16.5 mm) and (16.2 mm). However, activity was also reported against (15.5 mm) and (15 mm). The different concentrations of extract (10μl and 20μl) were used and the minimum inhibitory concentration (MIC) ranging from 62.5 to 2000 μg/ml was compared with the standard drug Chloramphenicol (5μg). The MIC of methanolic extract was found 550 μg/ml against and The results of present study revealed that leaves of amla possesses antibacterial potential and source of new antibiotics. Therefore, medicinal plants are finding their way into pharmaceuticals, neutralceuticals and food Supplements that could be useful in chemotherapy to control infectious diseases.

Enamel Remineralization Efficacy of Coconut Milk and Lyophilized Coconut Extract in Different Concentrations on Demineralized Enamel Surfaces: An In-Vitro Study.

Aim The current study's objective is to determine the remineralizing efficacy of freeze-dried lyophilized coconut extract and coconut milk made from freshly grated coconut on artificial carious lesions produced by pH cycling. Materials and methods Freshly extracted coconut pulp was split into two parts. The first half was blended to obtain coconut milk, and the second part was freeze-dried and lyophilized. Tooth slabs were prepared from extracted third molar teeth. After being demineralized for 72 hours, the tooth samples were remineralized by submerging them in the appropriate remineralizing solution, which is as follows: Group 1 received 25 mL of the Remineralization solution (the control); Group 2 received 2.5 g of coconut milk and 25 mL of the solution (1:1); and Group 3 received 5 g of coconut milk and 25 mL of the solution (2:1). 2.5 g of freeze-dried, lyophilized coconut extract was given to Group 4 along with 25 mL of remineralization solution (1:1), and 5 g of freeze-dried, lyophilized coconut extract was given to Group 5 along with 25 mL of remineralization solution (2:1). Microhardness and contact angle measurements were made. An Excel spreadsheet was filled up with values from after demineralization, and after remineralization. A statistical analysis was performed using SPSS 26.0 (IBM Corp., Armonk, NY). Using descriptive statistics, the pretreatment mean values for the microhardness and contact angle of the various groups were evaluated. Post-hoc Tukey tests were utilized to compare the analytic results of the various groups. Results Among the various concentrations of freshly extracted coconut milk, the contact angle inconcentrations of 1:1 was 81.22 ± 1.62 deg, and that in concentrations of 2:1 was 88.01 ± 1.85 deg. Between the two concentrations of the lyophilized coconut extract group, the contact angle in 1:1 was 75.05 ± 2.29 deg, and in 2:1 was 71.37 ± 0.85 deg. In the coconut milk group, the value of microhardness was 261 ± 6.4 kg/cm2 at a lower concentration and 322 ±3.9 kg/cm2 at a higher concentration. In the lyophilized coconut group, the lower concentration exhibited a microhardness of 211 ±7.2 kg/cm2, whereas in the higher concentration, it was 324 ±4.04 kg/cm2. Conclusion Of the various concentrations of coconut milk and lyophilized coconut used, coconut milk at a higher concentration exhibits the highest contact angle, and the latter at a higher concentration exhibits the lowest contact angle. In both groups, high concentrations of the material exhibited high microhardness values compared to lower concentrations of the same.

Larvicidal proficiency of volatile compounds present in Commiphora wightii gum extract against Aedes aegypti (Linnaeus, 1762).

Aedes mosquitoes are the major cause of several vector-borne diseases in tropical and subtropical regions. Synthetic pesticides against these mosquitoes have certain limitations; hence, natural, eco-friendly, and safe larvicides obtained from plant resources are used to overcome these. In the present study, the larvicidal efficiency of Commiphora wightii against the fourth instar stage of the dengue fever mosquito Aedes aegypti (Linnaeus, 1762) was studied. The gum resin of C. wightii was collected using the borehole tapping method, and hexane extracts in different concentrations were prepared. The fourth-instar larvae were exposed to the extracts, and percent mortality, as well as LC20, LC50, and LC90, was calculated. Volatile compounds of the hexane gum extract were analyzed by Headspace GC/MS, and the sequence of the acetylcholine, Gamma-aminobutyric acid (GABA) receptor, and octopamine receptor subunit of A. aegypti was obtained. It was found that the hexane gum extract was toxic and lethal for larvae at different concentrations. Minimum mortality was observed at 164 µg mL-1 (10%/h), while maximum mortality was at 276 µg mL-1 (50%/h). The lethal concentrations LC20, LC50, and LC90 were 197.38 µg mL-1, 294.13 µg mL-1, and 540.15 µg mL-1, respectively. The GC/MS analysis confirmed the presence of diterpenes, monoterpenes, monoterpene alcohol, and sesquiterpenes in the gum samples, which are lethal for larvae due to their inhibitory activity on the acetylcholinesterase enzyme, GABA receptor, and octopamine receptor subunit. The use of commonly occurring plant gum for the control of mosquitoes was explored, and it was found that the gum of C. wightii had larvicidal activities and could be potentially insecticidal.

Comparative acute toxicity study of Syringodium isoetifolium on aquatic and rodent experimental animals

This study was intended to assess the acute toxicity of hydroalcoholic leaf exact of Syringodium isoetifolium seagrass on brine shrimp, zebrafish and Wistar albino rats. The extract of different concentrations were used for brine shrimp (0.01-5 mg/ml in propylene glycerol/Tween 80/ water (4:1:4), zebrafish (12.5, 25, 50, 100, 200, 400 mg/ml), and female albino Wistar rat (500, 1000, 2000, 2500 and 5000 mg/kg) study. The control group received distilled water and the studies were carried out as per the OECD guidelines. The experimental subjects were observed individually for the first 24 hours, with special attention given during the first four hours, thereafter for a prescribed duration. The results of brine shrimp exhibited increased mortality with increasing concentration of the extract. Maximum mortality occurred at 1000 µg/ml and the least mortalities happened at 1 µg/ml concentration. Whereas no mortality and physical damage were identified in the zebrafish and Wistar albino rats irrespective of the concentration. The study revealed that the extract was found to be a toxic effect on brine shrimp due to the poor elimination of cytotoxic substances from the body at high concentrations and elimination freely at low concentrations. No toxicity was exerted on other study subjects.

Comparative analysis of Azardica indica, Mentha piperita and Camellia sinensis aqueous leaf extract against Enterococcus faecalis (oral pathogen)

Azardica indica has been widely used in Ayurvedic and unani medicines worldwide especially in Indian subcontinent for treatment and prevention of various diseases. Mentha pipetita commonly known as mint is cultivated all over the world due to its domestic as well as therapeutic value. Camellia sinensis on the other hand has become essential for weight management because of presence of certain phytochemicals. Clinical studies have suggested that active compounds present in all these plants possess a positive impact in reducing the bacterial growth caused by Enterococcus faecalis in tooth. Different concentration of extracts and zones of inhibition were measured. Among all the three extract the maximum zone of inhibition was shown by Azardica indica hence proved to be the best antibiotic against oral pathogen.

Metronidazole Potentiation by Panax Ginseng and Symphytum officinale: A New Strategy for P. gingivalis Infection Control.

The important periodontal disease pathogen Porphyromonas gingivalis produces thick biofilms that increase its pathogenicity. Finding natural antimicrobial agents is crucial because of the rise in antibiotic resistance. The purpose of this study was to determine if plant extracts such as Symphytum officinale (S) and Panax Ginseng (G) were effective against P. gingivalis separately and in combination with a common antibiotic, metronidazole (F). Six different dilutions were produced using the plant extracts in different concentrations and antibiotics separately and in combination with F, G, and S using the two-fold serial dilution technique. To evaluate the effects of these substances, biofilm inhibition experiments were conducted. Plaque samples were collected from periodontitis patients to isolate P. gingivalis, and a standard strain of P. gingivalis (ATCC 33277) was purchased. Additionally, Acylated Homoserine Lactones (AHLs) detection was carried out to look for any activity that would interfere with quorum sensing. GraphPad Prism was used for statistical analysis with a p-value < 0.05. The combinations of Symphytum officinale and metronidazole (S+F) showed the maximum effectiveness in biofilm inhibition (98.7%), which was slightly better than G+F (98.2%), with substantial variations in biofilm inhibition levels in different treatment regimes. Notably, the patient isolate was more active than the standard strain. Additionally, the plant extracts and their combinations at particular dilutions had notable inhibitory effects on the generation of AHL (p < 0.05). The study highlights the possibility of Symphytum officinale and Panax Ginseng as effective treatments for P. gingivalis biofilm and AHLs, both on their own and in combination with metronidazole. These organic substances may open the door to cutting-edge methods of treating periodontal disorders.

Investigation of Kelussia Odoratissima and Angelica Sinensis Similarities in Zebrafish-based In-vivo Bioactivity Assays and Their Chemical Composition.

Kelussia odoratissima and Angelica sinensis are two medicinal plants commonly used in Iran and China, respectively. They have been used in their indigenous traditional medicine, for various diseases including, blood refining, inflammation, cold, flu, stress, cardiovascular diseases, and nervous disorders. This study was conducted to evaluate the volatile oil composition of K. odoratissima leaves (KVL) and A. sinensis root (AVR); we also examined the biological activity of essential oils (EOs) and hydroalcoholic extracts of both plants using two different transgenic zebrafish (Danio rerio) models: angiogenesis and pancreatic beta cell (pBC) regeneration models. Both EOs were isolated by hydrodistillation and analysed by GC and GC/MS. For viability tests, larvae were treated with different concentrations of extracts to determine an appropriate starting concentration. Hydroalcoholic extracts and EOs have been tested in a dose-dependent manner for their biological activity using tissue-specific transgenic zebrafish Tg(fli-1: EGFP) and Tg (ins: GFP-NTR) embryos and larvae. One-way ANOVA was used to compare the mean of pBC area and intersegmental vessels (ISVs) outgrowth between the treatment groups. Eleven compounds were in common to both oils, comprising 51.3% of KVL and 61.7% of AVR, of which 39.3% in KVL and 37.6% in AVR were phthalide structures. Results revealed that both EOs blocked ISVs formation in the Tg (fli-1: EGFP) embryos increased to 10% of the control value, while both hydroalcoholic extracts did not show any anti-angiogenesis effects in these embryos. In addition, AVR has been shown to significantly induce PBC regeneration following ablation in the Tg (ins: GFP-NTR), but its regenerative activity was lower than that of 5'-N-ethylcarboxamidoadenosine (NECA) as a positive control. Taken together, the anti-angiogenesis activity of both EOs could be attributed to the phthalide structures while for the PBC regenerative activity, other compounds including β-Thujaplicinol, exclusively existing in AVR, might be effective. Although the genera, organs, and origin of these plants are different, their similar chemical composition and biological activities make them valuable resources for further investigation in basic medical and pharmaceutical science.

Pre-clinical toxicity assessment of Artemisia absinthium extract-loaded polymeric nanoparticles associated with their oral administration.

Background: This study was designed to quantify the composition of the ethanolic extract of Artemisia absinthium through gas chromatography-mass spectrometry analysis and ensure in vivo safety of A. absinthium extract-loaded polymeric nanoparticles (ANPs) before considering their application as a drug carrier via the oral route. Methods: We synthesized N-isopropylacrylamide, N-vinyl pyrrolidone, and acrylic acid crosslinked polymeric NPs by free-radical polymerization reaction and characterized them by Fourier-transform infrared spectroscopy, transmission electron microscopy, and dynamic light scattering spectroscopy. Different concentrations of extract (50mg/kg, 300mg/kg, and 2,000mg/kg body weight) were encapsulated into the hydrophobic core of polymeric micelles for the assessment of acute oral toxicity and their LD50 cut-off value as per the test procedure of OECD guideline 423. Orally administered female Wistar rats were observed for general appearance, behavioral changes, and mortality for the first 30min, 4h, 24h, and then, daily once for 14days. Result: ANPs at the dose of 300mg/kg body weight were used as an initial dose, and rats showed few short-lived signs of toxicity, with few histological alterations in the kidney and intestine. Based on these observations, the next set of rats were treated at a lower dose of 50mg/kg and a higher dose of 2,000mg/kg ANPs. Rats administered with 50mg/kg ANPs remained normal throughout the study with insignificant histological disintegration; however, rats treated at 2,000mg/kg ANPs showed some signs of toxicity followed by mortality among all three rats within 24-36h, affecting the intestine, liver, and kidney. There were no significant differences in hematological and biochemical parameters among rats treated at 50mg/kg and 300mg/kg ANPs. Conclusion: We conclude that the LD50 cut-off value of these ANPs will be 500mg/kg extract loaded in polymeric NPs.

Phytochemical Characteristics and Antimicrobial Effects of &lt;i&gt;Nonea rossica&lt;/i&gt; (Boraginaceae) Extracts

Abstract—A phytochemical and microbiological analysis of a widespread Russian species, Nonea rossica Steven (Boraginaceae) was carried out. As an object of study, we used the aerial part (herb) of N. rossica, harvested during flowering stage from a steppe meadow in the Novosibirsk region. The qualitative composition of biologically active compounds (BAC) was determined by thin layer chromatography, using two solvent systems: ethyl acetate–ethanol–dimexide and ethyl acetate–anhydrous formic acid–glacial acetic acid–water. The quantification of their amount was carried out by spectrophotometry (flavonoids expressed as rutin, hydroxycinnamic acids – as caffeic acid, and coumarin-like compounds – as coumarin). The raw material ethanolic extracts of different concentrations (20, 40, 70 and 95%) were used in pharmacological research. Antimicrobial activity was determined by the serial dilution method. Strains of gram-positive bacteria (Staphylococcus aureus ATCC 6538 FDA 209P and Bacillus cereus ATCC 10702) and fungi – Candida albicans NCTC 885-653 were used as test cultures. The presence of bioactive phenolic compounds (hydroxycinnamic acids, flavonoids, coumarins) was established and their quantitative content was determined. It was observed that the highest yield of bioactive phenolic compounds resulted from using 40–70% ethanol as extractant. The microbiological activity of hydroalcoholic extracts from Nonea rossica herb was studied. It was determined that antimicrobial activity against Staphylococcus aureus and Bacillus cereus, and antifungal activity against Candida albicans were exhibited by 40–70% ethanolic extracts of Nonea rossica, where equal content of caffeic acid and coumarin was measured. The synergistic interaction of these compounds determines the established bactericidal and fungistatic properties of such extracts.

Uji Daya Hambat Ekstrak Etanol dan N-Heksana Daun Labu Kuning (Cucurbita moschata D.) terhadap Bakteri Staphylococcus epidermidis

Pumpkin leaf plant (Cucurbita moschata D.) is commonly used to treat gastric pain, jaundice, hipercholesterol, and contains antibacterial compounds. Nature products derived from plants are often used to treat facial skin disease by inhibiting acne-causing bacteria. Staphylococcus epidermidis has important role in acne formation. This research aims to determine the antibacterial activity, Minimum Inhibitory Concentration (MIC), and Minimum Bactericidal Concentration (MBC) of 70% ethanol extract and n-hexane against Staphylococcus epidermidis. Pumpkin leaf extracts were obtained by maceration technique then diluted to obtain the extracts with concentrations of 10%, 25%, and 50%. The antibacterial activity test of pumpkin leaves was carried out in vitro by well diffusion method on Mueller Hinton Agar (MHA) media, while MIC and MBC was determined by dilution method using different concentration of extract. The results of this research showed that there was inhibition zone formed at concentration 10%, 25%, and 50% of 70% ethanol extract of yellow pumpkin leaves. According to the result, the largest inhibition zone was obtained at concentration of 50% (20.02 ± 0,28 mm). The MIC value was found at concentration of 12.5% and MBC value was determined at 50% concentration of ethanol extract. Meanwhile, n-hexane extract of yellow pumpkin leaves has no antibacterial activity against S. epidermidis. It can be concluded that ethanol extract of yellow pumpkin leaves has potent antibiotic material for S. epidermidis.

Galdieria sulphuraria: An Extremophilic Alga as a Source of Antiviral Bioactive Compounds.

In the last decades, the interest in bioactive compounds derived from natural sources including bacteria, fungi, plants, and algae has significantly increased. It is well-known that aquatic or terrestrial organisms can produce, in special conditions, secondary metabolites with a wide range of biological properties, such as anticancer, antioxidant, anti-inflammatory, and antimicrobial activities. In this study, we focused on the extremophilic microalga Galdieria sulphuraria as a possible producer of bioactive compounds with antiviral activity. The algal culture was subjected to organic extraction with acetone. The cytotoxicity effect of the extract was evaluated by the 2,5-diphenyl-2H-tetrazolium bromide (MTT) assay. The antiviral activity was assessed through a plaque assay against herpesviruses and coronaviruses as enveloped viruses and poliovirus as a naked one. The monolayer was treated with different concentrations of extract, ranging from 1 µg/mL to 200 µg/mL, and infected with viruses. The algal extract displayed strong antiviral activity at non-toxic concentrations against all tested enveloped viruses, in particular in the virus pre-treatment against HSV-2 and HCoV-229E, with IC50 values of 1.7 µg/mL and IC90 of 1.8 µg/mL, respectively. However, no activity against the non-enveloped poliovirus has been detected. The inhibitory effect of the algal extract was confirmed by the quantitative RT-PCR of viral genes. Preliminary chemical profiling of the extract was performed using ultra-high-performance liquid chromatography coupled to high-resolution mass spectrometry (UHPLC-HRMS), revealing the enrichment in primary fatty acid amides (PFAA), such as oleamide, palmitamide, and pheophorbide A. These promising results pave the way for the further purification of the mixture to explore its potential role as an antiviral agent.

Application of Red Onion Peel Extract for Green Synthesis of Silver Nanoparticles in Hydrogels Exhibiting Antimicrobial Properties

UV-initiated green synthesis of metal nanoparticles by using plant extracts as photoreducing agents is of particular interest since it is an environmentally friendly, easy-to-maintain, and cost-effective method. Plant molecules that act as reducing agents are assembled in a highly controlled way which makes them suitable for metal nanoparticle synthesis. Depending on the plant species, their application for green synthesis of metal nanoparticles for diverse applications may contribute to the mediation/reduction in organic waste amounts, thus enabling the implementation of the circular economy concept. In this work, UV-initiated green synthesis of Ag nanoparticles in hydrogels and hydrogel’s thin films containing gelatin (matrix), red onion peel extract of different concentrations, water, and a small amount of 1 M AgNO3 have been investigated and characterized using UV-Vis spectroscopy, SEM and EDS analysis, XRD technique, performing swelling experiments and antimicrobial tests using bacteria (Staphylococcus aureus, Acinetobacter baumannii, Pseudomonas aeruginosa), yeasts (Candida parapsilosis, Candida albicans) and microscopic fungi (Aspergillus flavus, Aspergillus fumigatus). It was found that the antimicrobial effectiveness of the silver-enriched red onion peel extract–gelatin films was higher at lower AgNO3 concentrations as compared to those usually used in the commercially available antimicrobial products. The enhancement of the antimicrobial effectiveness was analyzed and discussed, assuming the synergy between photoreducing agent (red onion peel extract) and silver nitrate (AgNO3) in the initial gel solutions leading to the intensification of Ag nanoparticles production.

Effects of Ficus carica L. Water Extract on Taxus cuspidata Sieb. et Zucc. Growth

Our research group successfully designed the F. carica and Taxus cuspidata Sieb. et Zucc mixed forest, and confirmed that their interspecific relationship was stable and F. carica has a promoting effect on neighboring T. cuspidata growth. However, the promoting mechanism has not been elucidated. In this study, F. carica was used as the donor plant and T. cuspidata was used as the recipient plant. T. cuspidata seedlings were irrigated with F. carica root extracts of different concentrations (10.0, 20.0, 40.0 g·L−1), and the plant height, base diameter, photosynthetic parameters, photosynthetic pigments, MDA contents, and antioxidant enzyme activities were measured. Soil physical and chemical properties, enzyme activities, and microbial diversity were measured. The results showed that the abundance of growth-promoting bacteria increased and the number of pathogenic bacteria decreased in the rhizosphere of T. cuspidata soil. It was speculated that the chemicals secreted by F. carica roots interacted with soil microorganisms of T. cuspidata soil after enrichment, changed soil microbial diversity, and indirectly promoted the growth of T. cuspidata. UPLC-QTOF-MS/MS was used to analyze F. carica root water extract and F. carica root exudates, respectively, and it was found that the main components were similar. Therefore, the promoting effect of F. carica on T. cuspidata is mainly caused by the accumulation of potential chemicals in F. carica root exudates in the soil through interaction with soil microorganisms. Furthermore, the allelopathic-promoting mechanism of F. carica on T. cuspidata was discussed from various aspects, to provide a theoretical basis for the protection, breeding, and sustainable management of T. cuspidata resources.

Allelopathic potential of root and leaf aqueous extracts of invasive alien plant species, Cryptostegia grandiflora, on germination and seedling growth of Linum usitatissimum and Guizotia abyssinica

C. grandiflora has been termed the worst invasive alien plant species. However, its allelopathic potential has not been studied yet. The goal of this research was to study the allelopathic potential of C. grandiflora on the germination and seedling growth of L. usitatissimum and G. abyssinica. Plant specimens and samples of C. grandiflora were collected from the Minjar-Shenkora district, North Shewa Zone, Ethiopia. An experimental investigation was conducted to check the impact of its leaf and root extracts on the growth and germination parameters of the indicated test plant species. The root and leaf samples were extracted with water and methanol (99.85%). Leaf and root samples of 25 g were steeped separately in 250 ml of each of the specified solvents to make the stock solutions. The experiment was conducted in 9-cm-diameter Petri-dishes and laid out in completely random designs, replicated thrice with five blocks, each block representing a different concentration of extract (25, 50, 75, and 100%) and control. Twenty-five seeds of each test plant were placed in a petri-dish along with five ml of each extract. Differences between treatments were evaluated using one-way-ANOVA and Tukey's Honestly Significant Difference (HSD) Test. Results revealed that the inhibitory effect of water extracts of roots and leaves samples was concentration-dependent. With leaf extracts as opposed to root, the inhibitory effect was more pronounced. Hence, when L. usitatissimum seeds were treated with 100% concentration of water extracts from leaf samples of C. grandiflora germination-percentage, seedlings dry-weight, plumule, and radicle length were reduced by 80, 79.3, 73.6, and 79.4% respectively compared to the control. The above parameters also dropped considerably when G. abyssinica seeds were treated with the indicated concentrations. Conversely, the germination of seeds from both test plant species was entirely inhibited in methanol extracts. From this study, it can be deduced that these invasive plant extracts have herbicidal properties. Further phytochemical and molecular study is recommended to identify the active ingredients of C. grandiflora and determine their characteristics. Besides, the integration of identified allelopathic substances as a tool in the management of invasive species is proposed as an environment-friendly option to lessen the deterioration of ecosystem services.

Study of Corrosion Inhibitory Effects of Alcoholic Extracts of &lt;i&gt;Tinospora Cordifolia&lt;/i&gt; on Metal Tin in Acidic Media HCl with and without Additive (KCl)

The corrosion inhibitory efficiency of Tinospora Cordifolia stem and leaf extract in different concentrations of HCl acid (0.5, 1, 2, and 3N) was examined using weight loss and thermometric methods in the absence and presence of an additive (KCl). According to the findings of this investigation, inhibition efficiency (ɳ%) rises with increasing inhibitor concentration as well as acid strength, and additional improvement in inhibition efficiency was found with the addition of additives (KCl) owing to a synergistic effect. According to the findings, stem extract is a better corrosion inhibitor than leaf extract. The maximum inhibition efficiency was observed for stem and leaf extracts (95.76 and 92.47 %) at their maximum concentrations (0.8 %) in the absence of an additive in the maximum strength of HCl acid (3N), while it was observed at 98.58 and 95.29 % in the presence of additive (3N KCl) of maximum strength.

GC-MS Analysis of Bioactive compounds present in different extracts of an Endemic tree Huberantha senjiana (Annonaceae) leaves

Objective: To explore the volatile chemical constituents present in different crude extracts of Huberantha senjiana (H. senjiana) leaves. Method: The coarsely powdered foliar parts of the leaves were extracted sequentially with solvents of increasing polarity like n-hexane, chloroform, ethyl acetate, isopropyl alcohol, and methanol. The extracts obtained were subjected to GC-MS analysis. Results: The analysis revealed the presence of different non-polar compounds in all five extracts in different concentrations. The bioactive Phyto compounds were recognized and characterized based on their retention and elution order in an analytical column. The mass spectra are matched with the inbuilt database of the NIST 8 library to identify the compound present. Conclusion: The present study is considered to be the preliminary study that reveals the presence of volatile components in different leaf extracts of H. senjiana which will serve as a reference for future studies.