GC-MS Profile Research Articles

Investigating the antioxidant properties and GC-MS profile of Indian native medicinal flower Pandanus odorifer and assessing its cytotoxic effects on HT-29 cells

This study aimed to investigate the antioxidant potential and bioactive compounds of Pandanus odorifer flower. The phytochemical investigation includes both qualitative and quantitative experiments. In vitro antioxidant studies were conducted using DPPH, ABTS and hydroxyl methods. The bioactive compounds present in the ethanol extract were identified using GC-MS analysis. The MTT assay was carried out on HT-29 colon cancer cells to investigate the cytotoxic ability of the ethanolic extract. The qualitative phytochemical analysis demonstrated the presence of flavonoids, phenolic compounds, tannins, saponins, steroids, carboxylic acids and cardiac glycosides. The determination of flavonoid showed 400 ± 0.110 mg/g and 250±0.090 mg/g of quercetin equivalent in ethanol and water extracts. Similarly, the determination of phenol exhibited 108±0.210 mg/g and 87±0.173 mg/g gallic acid equivalent in ethanol and water extracts. The total antioxidant capacity revealed 1.6 ± 0.093 mg/g and 1.3± 0.056 mg/g equivalent of ascorbic acid in ethanol and water extracts. The DPPH assay showed IC50 values of 35.06 µg/mL in ethanol and 44.82 µg/mL in water extract. Likewise, the ABTS assay revealed an IC50 value of 42.20 µg/mL and 47.45 µg/mL in ethanol and water extract. The hydroxyl radical assay showed IC50 value of 23.95 µg/mL in ethanol and 36.56 µg/mL in water extract. 22 bioactive compounds were identified using GC-MS analysis based on their similarity index. The ethanolic extract showed greater cytotoxic activity with the IC50 value of 28.08 µg/mL on HT-29 colon cancer cells. This study concludes that the Pandanus odorifer flower extracts exhibited significant antioxidant and cytotoxic property.

Evaluation of antibacterial, phytochemical screening and GCMS profile of <i>Paullinia pinnata Linn.</i> leaf extracts against clinical wound isolates

Evaluation of antibacterial, phytochemical screening and GCMS profile of <i>Paullinia pinnata Linn.</i> leaf extracts against clinical wound isolates

GC-MS Profiling and Pathogenic Effect of Khaya Anthotheca Methanolic Leaves Extract on Some Selected Fungi

This research evaluated GC-MS profile, and pathogenic effect of methanolic leaves extracts of Khaya anthotheca on Some Selected fungi. Khaya anthotheca a member of Meliaceae family is traditionally used for treating several ailments. The leaves were harvested in Sukundi road Wukari and air dried for four weeks, the leaves were pulverized into powder using manual blender and stored in an air tight container. Extraction was done with absolute methanol; the extract was filtered using mesh and the filtrate was concentrated at 68oC. Only two grams of the filtrate were used for the GC-MS study. One-way analysis of variance (ANOVA) was used for statistical analysis. The GC-MS result revealed 50 constituents. Result of Methanolic extracts of leaves of Khaya anthotheca only showed significant activity against Aspergillus niger at dose100 µg/mL, Candida tropicalis and Fusarium oxysporium at dose 500 µg/mL. This study supports the use of Khaya anthotheca by indigenous herbalists by providing scientific proof of the plant's ability to treat pothegenic diseases. To establish the effectiveness of this plant in the management of fungal effections, more clinical trials at the clinical levels are needed.

The GCMS, antioxidant, and anti-inflammatory activity of the Ayurveda oil, Arukaladi tailam

Ayurvedic tailams have a long history of use and efficacy. They have been used for centuries, with many individuals reporting positive results in managing and improving their health. Ayurvedic tailams typically have fewer side effects compared to synthetic medications, making them a preferred choice for individuals seeking natural remedies and can be applied both externally (for massage) and, in some cases, internally (for specific therapies). This versatility allows for a wide range of applications and health benefits.The current study focuses on the GC MS analysis of Arukaladi tailam, an oil composition used in Ayurveda to treat jaundice when administered topically. Before being subjected to the GC MS analysis, the product was appropriately prepared after being purchased from a reputable Ayurvedic dealer in Chennai, India. The IC50 value of the DPPH assay was found to be 744.7391μl/ml and FRAP reveals that the tailam had good reducing power. Further the anti-inflammatory of the tailam exhibited 14.2% of haemolysis at 1000μl/ml and inhibited protein denaturation by 63.74% with an IC50 value of 789.4013 µl/ml. The presence of biomolecules as shown in the GC MS profile are 2-Fluoro-6-trifluoromethylbenzoic acid, 2- tetradecyl ester, Tridecanol, 2-ethyl-2-methyl-, etc. These chemicals could help the medication work better to treat jaundice.

GC-MS and HPLC chromatographic profile of majority volatile and phenolic compounds of some medicinal plants from Romania

GC-MS and HPLC chromatographic profile of majority volatile and phenolic compounds of some medicinal plants from Romania

Evaluation of mint (Mentha spicata) hydrodistillation aqueous byproducts and its utilization in development of bioactive-rich functional drink

Distillation aqueous byproducts are discarded despite being rich in bioactive components. In this study, the aqueous byproducts (hydrolats and flask water fractions) resulting from the hydrodistillation of fresh and dry mint leaves were compared, with a primary focus on their essential oil yield and bioactive properties. Dry mint leaves yielded approximately eight times more essential oil than fresh leaves. The hydrolat extracted from dried mint leaves (MHD) exhibited higher phenolics (35.5 ± 1.1d mg GAE/100 mL), flavonoids (7.8 ± 0.29d mg QE/100 mL) and 2,2-diphenylpicrylhydrazyl scavenging potential (21.13%), compared to the hydrolat derived from fresh leaves (MHF), which had lower values (7.115 ± 0.9e mg GAE/100 mL, 5.72 ± 0.422d mg QE/100 mL and 6.79%, respectively). Similarly, the flask water fraction from dry mint leaves (FWF2) had a higher concentration of bioactive compounds compared to that from fresh leaves (FWF1). The hydrolat with higher bioactivity (MHD) was selected for infusion to develop a flavored drink and its GCMS profile indicated a relatively abundant presence of D-Carvone. The flavored drink prepared with a 20:100 ratio of hydrolat was preferred for its flavor intensity, a key sensory parameter for determining the hydrolat amount. Additionally, for Gum Arabic, a 2.5:100 ratio in the drink resulted in a more acceptable consistency score.

Antioxidant activity, phytochemical screening and GC-MS profile of Abies marocana Trab.

The aim of this research was to explore the chemical composition and antioxidant activities of etheric extracts of Abies marocana. A Soxhlet apparatus was used to extract bioactive molecules from the various parts of the plant. Furthermore, the levels of antioxidant compounds were quantified, while the Gas chromatography was utilized to determine the chemical constituents of the extracted molecules. The extracts were evaluated for their antioxidant properties using the DPPH radical scavenging method and the total antioxidant capacity test. The levels of polyphenols varied across different parts of the plant, ranging from 2.474 ± 0.029 mg.g-1 DM in needles to 4.207 ± 0.008 mg.g-1 DM in twigs. Flavonoids were most abundant in needles 0.140 ± 0.001 mg.g-1 DM and least abundant in cones 0.069 ± 0.007 mg.g-1 DM. Tannins had the highest concentration in twigs 2.608 ± 0.114 mg.g-1 DM, followed by cones 1.948 ± 0.037 mg.g-1 DM and needles 1.512 ± 0.09 mg.g-1 DM. A chromatographic analysis revealed that 56 components were in the samples, with terpene compounds being the most abundant in the different organs. In terms of antioxidant activity, the extract derived from twigs exhibited the strongest antioxidant capacity 49.377 ± 0.371 mg EAA.g-1 DM, followed by cones 35.129 ± 0.084 mg EAA.g-1 DM and needles 13.663 ± 0.084 mg EAA.g-1 DM. Alternatively, the IC50 values for the three organs were found to be in the range of 3844 to 5047.67 µg.mL-1. The results highlight the potential phytopharmaceutical value of A. marocana due to the presence of diverse phyto-components.

GC-MS profile, total phenolic, and DPPH radical scavenging activity of Saurauia minahassae stembark ethyl acetate extract

Several species of the genus Saurauia have been traditionally used as remedies. However, Saurauria minahassae, as an endemic plant, is still understudied. This study aims to reveal the total phenolics, GC-MS profile, and bioactivity as DPPH free radical scavengers of ethyl acetate extract of S.minahassae collected from Banggai Island, Indonesia. Determination of Total Phenolic Content (TPC) was conducted using the colorimetry method by spectrophotometer. Thin layer chromatography (TLC) and TLC-bioautography performed analysis of secondary metabolites and qualitative DPPH free radical scavenging activity, respectively. GC-MS analysis was conducted to identify the chemical compounds of the extract. The extract’s IC50 value and Antioxidant activity index (AAI) were performed by serial microdilution method on the 96-microwell plate. The results showed that TPC was 432.33 mg GAE/g extract. TLC analysis revealed several metabolites, and TLC-bioautography also revealed several compounds active as DPPH free radical scavengers. The ethyl acetate extract of S. minahassae is categorized as a very strong DPPH free radical scavenger or potent antioxidant with an IC50 value of 3.29 ug/ml and AAI of 9.32. GC-MS profile of the ethyl acetate extract of S.minahassae stembark contained several compounds with antioxidant activity. The potential antioxidant activity of S. minahassae stembark extract was contributed by phenolic content and several compounds with antioxidant activity in the extract. This extract could be a good source of natural antioxidants, and S. minahassae sustainability as an endemic plant should be maintained.

Aqueous distillate of mature leaves of Vernonia zeylanica (L.) Less. and Mallotus repandus (Rottler) Müll. Arg. cued from traditional medicine exhibits rapid wound healing properties

Ethnopharmacological relevanceSri Lankan traditional medicine uses Vernonia zeylanica and Mallotus repandus broadly for the treatment of a multitude of disease conditions, including wound healing. Aim of the studyWe aimed to scientifically validate the safety and efficacy of wound healing of an aqueous distillate of Vernonia zeylanica and Mallotus repandus (ADVM) mature leaves, tested on primary human dermal fibroblasts. Materials and methodsHuman dermal fibroblasts isolated from clinical waste from circumcision surgery were characterized by flowcytometry and trilineage differentiation. The MTT dye reduction assay, and the ex vivo wound healing scratch assay established wound healing properties of ADVM using the primary human dermal fibroblast cell line. Upregulation of genes associated with wound healing (MMP3, COL3A1, TGFB1, FGF2) were confirmed by RT qPCR. GC-MS chromatography evaluated the phytochemical composition of ADVM. ResultsCompared to the synthetic stimulant, β fibroblast growth factor, ADVM at 0.25% concentration on the primary dermal fibroblast cell line exhibited significant ex vivo, (i) 1.7-fold % cell viability (178.7% vs 304.3 %, p < 0.001), (ii) twofold greater % wound closure (%WC) potential (47.74% vs 80.11%, p < 0.001), and (iii) higher rate of % WC (3.251 vs 3.456 % WC/h, p < 0.05), sans cyto-genotoxicity. Up regulated expression of FGF2, TGFB1, COL3A1 and MMP3, genes associated with wound healing, confirmed effective stimulation of pathways of the three overlapping phases of wound healing (P < 0.05). GC-MS profile of ADVM characterized four methyl esters, which may be posited as wound healing phytochemicals. ConclusionsExceeding traditional medicine claims, the exvivo demonstration of rapid skin regeneration, reiterated by upregulated expression of genes related to wound healing pathways, sans cytotoxicity, propounds ADVM, cued from traditional medicine, as a potential safe and effective natural stimulant for rapid wound-healing. Additionally, it may serve as an effective proliferative stimulant of dermal fibroblasts for cell therapy, with potential in reparative and regenerative therapy of skin disorders.

Phytochemical analysis, GC–MS profile and determination of antibacterial, antifungal, anti-inflammatory, antioxidant activities of peel and seeds extracts (chloroform and ethyl acetate) of Tamarindus indica L

Tamarindus indica L., is widely used tree in ayurvedic medicine. Here, we aimed to understand the presence of important constituents in seeds and peel of Tamarind fruits and their biological activities. Hence, seeds and peel of Tamarind fruits are used for further extraction process by soxhlet method (chloroform and ethyl acetate solvents). Results suggest that the ethyl acetate extract (seeds) consists of terpenoids (72.29 ± 0.513 mg/g), phenolic content (68.67 ± 2.11 mg/g) and flavonoids (26.36 ± 2.03 mg/g) whereas chloroform extract (seeds) has terpenoids (42.29 ± 0.98 mg/g). Similarly, chloroform extract (peel) has terpenoids (25.96 ± 3.20 mg/g) and flavonoids (46.36 ± 2.03 mg/g) whereas ethyl acetate extract (peel) has terpenoids (62.93 ± 0.987 mg/g). Furthermore, anti-inflammation activity results revealed that the chloroform extract of peel was found to be more effective with IC50 of 226.14 µg/ml by protein denaturation analysis and with IC50 of 245.5 µg/ml on lipoxygenase inhibition activity. Chloroform extract (peel and seeds) shown better antioxidant activity using DPPH than ethyl acetate extract (peel and seeds). Ethyl acetate extract of seeds showed impressive potency by inhibiting the growth of fungus, Candida albicans. Additionally, ethyl acetate extract of seeds showed impressive potency inhibiting the growth of Escherichia coli than Bacillus cereus. GC–MS analysis shown the existence of diverse set of phytochemicals in each extract. Overall, comparative studies highlight the effectiveness of seeds extracts than peel extracts. Moreover, GC–MS results suggest that the seeds and peel extracts (chloroform and ethyl acetate) contains a wide range of compounds (including flavonoids, isovanillic acid, fatty acids and phenolic compounds) which can be utilized for therapeutic purpose.

Plant leaves extract assisted eco-friendly fabrication of ZnO-SnO2@Chitosan for UV-induced enhanced photodegradation of single and ternary mixtures of Rhodamine B

The inadequate handling and uncontrolled discharge of organic dyes into aquatic environments can result in elevated toxicity levels and have adverse effects on both human health and the overall ecosystem. The present work investigated the photodegradation efficiency of the ZnO-SnO2@chitosan nanocomposite (NC) for Rhodamine B (RhB) under ultraviolet (UV) irradiation. The ZnO-SnO2@chitosan nanocomposite (NC) was synthesized via a simple, eco-friendly, and less energy-intensive route, i.e., the co-precipitation method. The synthesized NC was extensively characterized using X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FTIR), UV–Vis spectroscopy, Brunauer-Emmett-Teller (BET) analysis, field emission scanning electron microscope (FE-SEM), energy dispersive X-ray (EDX) spectroscopy, and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). The chitosan-modified nanocomposite (NC) exhibits a moderate surface area of 79 m2/g with a low band gap value of 2.72 eV. The photodegradation process depended on operational parameters, such as pH, irradiation time, temperature, dye concentration, and dosage of the photocatalyst. The degradation data of RhB dye was interpreted through a kinetic model, and the data agreed well with the pseudo-first-order kinetics. The rate constant values deciphered from the kinetic model were found to fall in the range of 0.0281–0.0182 min–1 for 25–100 mg/L of dye concentration, suggesting that the synthesized photocatalysts facilitate the dye mineralization process by reducing the activation energy barrier. The interpretation of the reaction intermediates was accomplished with the help of a GC-MS profile to understand the underlying reaction mechanism. The photodegradation potential of the synthesized NC was explored for individual dyes such as RhB, MB and CV and the mixed dye system (RhB+MB+CV). The NC performs better for individual dyes (RhB, CV, and MB), and the degradation performance diminished slightly in the case of mixed dye solution. The reusability study of the synthesized nanocomposites portrayed the successful utility of the recycled NC up to four times without any significant loss in the degradation capacity, thus making the overall degradation process economical and sustainable. The E–factor (a green chemistry metric) study infers that the NC synthesis process imposes no significant threat to the environment and can be safely used in wastewater treatment.

Comparative phytochemical profiling of different parts of Saraca asoca

Saraca asoca is a plant that is widely used in Ayurveda drug preparations and is most used in Ashokarista. The bark of the plant is used and the removal of the bark from the plant is a destructive mode of material collection and it eventually kills the plant leading to resource scarcity. The present study made an attempt to assess the possibility of using other plant parts of S. asoca in place of bark. Major phytochemicals including alkaloids, carbohydrates, phenols, glycosides, quinones, coumarins, terpenoids, flavonoids, and tannins, were observed to be present in bark, young stem and leaf samples with varying levels. Saponins and anthocyanins were absent in bark and young stem samples, however present in leaf samples. The study showed a completely different GC–MS profile indicating the presence of different volatile molecules in different plant parts. The HPTLC fingerprint of different plant parts of S. asoca represents the characteristic markers of this herb. The study provided the quantitative evaluation of gallic acid present in the bark, young stem and leaves of S. asoca. The leaves of S. asoca are found to have maximum content of gallic acid compared to bark and young stem. The study concludes that the substitution of bark with young stems and leaves may not be a viable option considering their phytochemical constitution. However, the increased level of gallic acid in leaves can be considered as a promising option, wherein the activity of gallic acid is modulating the drug action.

GC-MS profile of extracts of an endophytic fungus Alternaria and evaluation of its anticancer and antibacterial potentialities

Abstract Using microbial endophytes to produce bioactive compounds is a reliable scientific method. This investigation aimed to use the Acacia plant for isolating an endophytic fungal strain that has a bio-ability to produce a bio-crude extract. This study also encompassed the assessment of the extract’s biological efficacy as an antibacterial and anticancer agent. Samples of the Acacia plant were collected from “Shuaib Huraymila,” in Riyadh, Saudi Arabia. The isolation and identification of fungal endophytes was done, and then, the production of crude extract was performed using the isolated endophytes. The profile gas chromatography-mass spectroscopy of the extract was determined, followed by the assessment of its biological activity against drug-resistant infections and cancer cells through in vitro examination. The findings showed that the fungal endophyte was Alternaria (Alternaria sorghi), according to internal transcribed spacer sequencing and basic local alignment search tool analysis. The minimum inhibitory concentrations of the extract were 9.1 and 4.5 mg/mL for methicillin-resistant Staphylococcus aureus and drug-resistant Candida auris, respectively, and the IC50% values were 46.6 and 23.7 mg/mL for MCF-7 and A549, respectively. The findings showed that this strain had no antagonistic action against Culex pipiens. This study concluded that the fungal endophyte isolated from the Acacia plant has the bio-ability to produce antimicrobial and anticancer agents.

Antimicrobial, Cytotoxic, and Anti-Inflammatory Activities of Tigridia vanhouttei Extracts.

In this work, bulb extracts of Tigridia vanhouttei were obtained by maceration with solvents of increasing polarity. The extracts were evaluated against a panel of pathogenic bacterial and fungal strains using the minimal inhibitory concentration (MIC) assay. The cytotoxicity of the extracts was tested against two cell lines (THP-1 and A549) using the MTT assay. The anti-inflammatory activity of the extracts was evaluated in THP-1 cells by measuring the secretion of pro-inflammatory (IL-6 and TNF-α) and anti-inflammatory (IL-10) cytokines by ELISA. The chemical composition of the extracts was recorded by FTIR spectroscopy, and their chemical profiles were evaluated using GC-MS. The results revealed that only hexane extract inhibited the growth of the clinical isolate of Pseudomonas aeruginosa at 200 μg/mL. Against THP-1 cells, hexane and chloroform extracts were moderately cytotoxic, as they exhibited LC50 values of 90.16, and 46.42 μg/mL, respectively. Treatment with methanol extract was weakly cytotoxic at LC50 443.12 μg/mL against the same cell line. Against the A549 cell line, hexane, chloroform, and methanol extracts were weakly cytotoxic because of their LC50 values: 294.77, 1472.37, and 843.12 μg/mL. The FTIR analysis suggested the presence of natural products were confirmed by carboxylic acids, ketones, hydroxyl groups, or esters. The GC-MS profile of extracts revealed the presence of phytosterols, tetracyclic triterpenes, multiple fatty acids, and sugars. This report confirms the antimicrobial, cytotoxic, and anti-inflammatory activities of T. vanhouttei.

Chemical profiling and biological activities of Dipterygium glaucum Decne.: An in-vivo, in-vitro and in-silico evaluation

Dipterygium glaucum Decne. is a desert plant with medicinal significance used traditionally in treating bronchial asthma. This study investigated the phytochemical composition, toxicity, antioxidant, anti-inflammatory, antidiabetic and anti-Alzheimer potential of the ethanolic extract of D. glaucum (DGEE). The chemical composition showed that the extract is rich in TPC (119.56 ± 1.23 GAE/g) and TFC (53.29 ± 3.21 QE/g) with 31 compounds detected in GC-MS analysis. The acute toxicity study revealed the safety of the extract with no significant difference in physical, biochemical, hematological parameters and the weight of the vital organs at 300 mg/kg B.W. of day-old chicks. The anti-inflammatory evaluation presented a significant (p < 0.001) anti-inflammatory effect compared to the standard dexamethasone. Similarly, in in vitro antidiabetic evaluation, the extract showed inhibitory potential against α-glucosidase with an IC50 value of (18.24 ± 0.05 µg/ mL) and anti-Alzheimer potential by inhibiting acetylcholinesterase with an IC50 value of (39.65 ± 0.08 µg/ mL). The in vitro antioxidant capacity determination of DGEE presented strong activity with the highest (47.27 ± 0.07 mg TE/g) in the DPPH method. The in-silico studies of the selected compounds from the GC-MS profile showed good molecular docking interaction against α-glucosidase and acetylcholinesterase. Similarly, the in silico computational approach was applied to study the interaction of the compounds with antioxidant enzymes and nitric oxide synthase. Overall, the results revealed that the extract is safe for use and it exerts pharmacological effects through the antioxidant-based mechanisms and warrants further research on its toxicity and in vivo pharmacological profile.

Eco-Friendly Degradation of Natural Rubber Powder Waste Using Some Microorganisms with Focus on Antioxidant and Antibacterial Activities of Biodegraded Rubber

Natural rubber (NR) powder wastes contribute to the pollution of the environment and pose a risk to human health. Therefore, Escherichia coli AY1 and Aspergillus oryzae were used to degrade NR in the present investigation. The biodegradation was further confirmed using E. coli AY1 and A. oryzae’s ability to create biofilm, which grew on the surface of the NR. Additionally, the biodegraded NR was examined by scanning electron microscopy (SEM), attenuated total reflection–Fourier transform infrared (ATR–FTIR) spectroscopy, and gas chromatography–mass spectrometry (GC–MS). The highest weight loss (69%) of NR was detected (p &lt; 0.05) after 210 d of incubation with the mixed microbial culture (E. coli AY1 + A. oryzae). In the SEM, the surface of the control treatment appeared uniform and normal, whereas the surface of the microbial treatment displayed an irregular shape, with apparent particle deformation and surface erosion. After biodegradation by E. coli AY1 and A. oryzae, the particle size range of the untreated NR dropped from (5.367–9.623 µm) to (2.55–6.549 µm). After treating NR with E. coli AY1 and A. oryzae, new bands appeared in the ATR–FTIR technique; others shifted down in the range of 3910–450 cm−1, suggesting the existence of active groups belonging to alcohol, secondary amine, aromatic amine, conjugated anhydride, aldehyde, alkene, and halo compounds. On the other hand, the GC–MS profile reports a significant decline (p &lt; 0.05) in the amount of hydrocarbons while simultaneously reporting a significant increase (p &lt; 0.05) in the proportion of oxygenated, sulfurous, and nitrogenous compounds. These active groups are attributed to the antioxidant and antibacterial properties of biodegraded NR by a mixture of E. coli AY1 and A. oryzae, which rose 9-fold (p &lt; 0.05) compared to untreated NR. Through the use of this research, we will be able to transform NR waste into a valuable product that possesses both antioxidant and antibacterial properties.

GC-MS profile and antimicrobial activities of extracts from root of Senna occidentalis Linn.

Abstract We considered the extraction of plant materials from Senna occidentalis root, and its fractionation monitored by bioassay towards isolating its bioactive principles. Pulverized root sample of Senna occidentalis (fam. leguminaceae) was extracted with methanol using a maceration method. The crude methanol extract (MSo) 6.06 g was partitioned into petroleum ether and ethyl acetate to yield their respective fractions viz: petroleum ether fraction (1.20 g), ethyl acetate fraction (1.86 g) and methanol fraction (2.92 g). The crude methanol extract was analyzed using phytochemical screening, infrared spectroscopy, and gas chromatography/mass spectrometry while the fractions were examined for antimicrobial properties. Phytochemical screening indicated the presence of tannins, phenolics, alkaloids, flavonoids, saponins, cardiac glycosides, phlobatannin, and absence of steroids. The infrared spectrum revealed a broad absorption band at 3437.26 cm-1 due to O-H symmetric stretch in polymeric alcohols, and absorption frequency of 1640.51cm-1 of moderate intensity due to C=O stretch. Enols are easily identified by the broad H-bonded O-H stretch absorption and low C=O stretch frequency as in β-keto enolic esters and phenol acetates, -CO-O-C=C-, (1690-1650 cm-1). Gas chromatography/mass spectrometry identified the presence of ten compounds including n-hexadecanoic acid (23.76%), linoleic acid (1.64%), E-9-tetradecenoic acid (4.88%), octadecanoic acid, 2-(2 hydroxyethoxy) ethyl ester (6.24%) and E-2-octadecadecen-1-ol (13.74%). Similar broad spectrum antimicrobial activities were manifested by methanol and ethyl acetate fractions. Escherichia coli and Bacillus cereus were the most susceptible with the highest zone of inhibition of 30 mm and 28 mm respectively at minimum inhibition concentration of 1.35 x103 μg/ml. The methanol fraction has the highest potency against the tested pathogens whereas the petroleum ether fraction exhibited activity only on gram negative pathogens. The antimicrobial activities observed in these fractions suggest the presence of active chemical components in the crude methanol root extract of Senna occidentalis thus provides a potential source of novel antimicrobial agents. Further work is however, required to isolate and characterize these bioactive principles.

Simultaneous bioremediation of petroleum hydrocarbons and production of biofuels by the micro-green alga, cyanobacteria, and its consortium

There are two major problems in the world, fuel deficiency and environmental pollution by fossil fuels. Microalgae are regarded as one of the most feasible feedstocks for the manufacturing of biofuels and are used in the degradation of fossil fuel spills. The present study was possessed to investigate the ability of green alga Chlorella vulgaris, blue-green alga Synechococcus sp, and its consortium to grow and degrade hydrocarbon such as kerosene (k) with different concentrations (0, 0.5, 1, and 1,5%), and also using algal biomasses to produce biofuel. The algal growth was estimated by optical density (O.D) at 600 nm, pigment contents such as Chlorophyll a,b carotenoid, and dry weight. The kerosene degradation was estimated by FT-IR analysis after and before the cultivation of algae and its consortium. The components of the methanol extract were determined by GC-MS spectroscopy. The results denote the best growth was determined by O.D, algae consortium with 1.5% Kerosene after ten days, meanwhile, the highest dry weight was with C. vulgaris after ten days of cultivation. The FT-IR demonstrated the algae and consortium possessed high efficacy to degrade kerosene. After 15 days of algae cultivation with 1% K, C.vulgaris produced the maximum amount of lipids (32%). The GC-MS profile of methanol extract of two algae and consortium demonstrated that Undecane was presented in high amounts, C.vulgaris (19.9%), Synechococcussp (82.16%), algae consortium (79.51%), and also were presented moderate amounts of fatty acid methyl ester in Synechococcus sp. Overall, our results indicate that a consortium of algae can absorb and remove kerosene from water, and at the same time produce biofuels like biodiesel and petroleum-based fuels.

Antifouling activity and biodegradable potential of the bioactive metabolites isolated from mangrove Avicennia officinalis L

The present study explores the antifouling potentials of ethanol extract of mangrove Avicennia officinalis. Results of antibacterial activity inferred that extract had strongly inhibited the growth of fouling bacterial strains with significant differences in halos (9-16 mm) and showed minimal bacteriostatic (12.5–100 µg ml−1) and bactericidal (25-200µg ml−1) values. It had also strenuously suppressed fouling microalgae with appreciable MIC (12.5 and 50 µg ml−1). The extract had also effectively deterred settlement of larvae of Balanus amphitrite and byssal thread of mussel Perna indica with lower EC50 (11.67 and 37.43 µg ml−1) and higher LC50 (257.33 and 817 µg ml−1) values. Further 100% recuperation of mussels from toxicity assay and therapeutic ratio of >20 substantiated its non-toxicity. GC-MS profile of bioassay guided fraction showed four (M1-M4) major bioactive metabolites. In silico biodegradability study revealed that metabolites M1 (Pentanoic acid, 5-methoxy-, phenyl ester) and M3 (Benzaldehyde, methyl-) have rapid biodegradation rates and eco-friendly in nature.

Formulation and Phytochemical Profile of a Product Prototype Infused with Cannabis sativa Leaves

This study investigated the formulation of a product prototype RMUTI-SKC by using the legal part of cannabis plants (leaves). Five product prototypes were composed of cannabis (leaves), stevia and mint. The herbs were added to improve the taste, smell and physical appearance properties of the product prototype which was yellowish-green. The analysis of the chemical properties found no heavy metals (Cd, As, and Pb) were observed (based on THAI community product standard, and demonstrated a moderate antioxidant activity, total phenolic content and total flavonoid content. The GC-MS profile of crude extracts analysis revealed the phytochemicals based on pharmacological action of essential oil, flavoring substance, anti-inflammatory, antioxidant, anti-bacterial, antidiabetic, antifungal and anti-cancer, respectively. The experimental results showed the pharmacological properties of the product prototype which can be a guideline for applying cannabis plants to other products. Further study on pathogen testing and product aging should be carried out to satisfy the quality of production. HIGHLIGHTS The formulation of a product prototype RMUTI-SKC by using the legal part of cannabis plants (leaves). The analysis of the chemical properties found no heavy metals (Cd, As and Pb) were observed (based on THAI community product standard, and demonstrated a moderate antioxidant activity, total phenolic content and total flavonoid content. GRAPHICAL ABSTRACT