Relevant bibliographies by topics / Aqueous extracts

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Academic literature on the topic 'Aqueous extracts'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 March 2023

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Journal articles on the topic "Aqueous extracts"

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Salman, Khawlah Abdallah, Hussein Ali Hussein, Ohood Aqeed Radhi, and Ali Rasool Assai. "Effect of Thyme aqueous and alcoholic extract on the Beef Mincemeat shelf life extension." Journal of Experimental Biology and Agricultural Sciences 10, no. 1 (February 28, 2022): 124–30. http://dx.doi.org/10.18006/2022.10(1).124.130.

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Antioxidant and antimicrobial activity of thyme has been well established against various microorganisms. This study was carried out to investigate the effect of aqueous and alcoholic extract of thyme on beef mincemeat quality. Three differential concentrations (0.4, 0.8, and 1.2 mg/ml) of both thyme extracts were used for the beef mincemeat preservation. Untreated meat samples were considered as the control group while the extracts treated beef mincemeat are stored at 4°C for 7 to 14 days. To validate the extract's ability to prolong the storage period at 4 °C, various bacteriological indicators like total plate count, presence of total coliform, Salmonella, Shigella, and Staphylococcus aureus count were assessed. The results of the antimicrobial assay of aqueous and alcoholic extracts of thyme at different concentrations showed that the aqueous extract had significant inhibitory action on the growth of a wide range of bacteria compared to the alcoholic extract. Thus, the thyme aqueous extracts can be efficient and promising as preservatives for meat and its products, especially at high concentrations to inhibit bacterial growth.
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Agban, Amégninou, Yao Hoekou, Passimna Pissang, Tchadjobo Tchacondo, and Komlan Batawila. "Evaluation du potentiel antimicrobien et de la toxicité des extraits de Jatropha multifida Linn, (Euphorbiaceae)." Journal of Applied Biosciences 151 (July 31, 2020): 15550–58. http://dx.doi.org/10.35759/jabs.151.4.

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Objectif : L’objectif de ce travail était d’évaluer in vitro l’activité antimicrobienne des extraits de feuilles et tige de Jatropha multifida sur la croissance de Candida albicans, Escherichia coli et Staphylococcus aureus, puis d’évaluer in vivo la toxicité de cette plante. Méthodologie et résultats : Les méthodes de diffusion en milieu gélosé et de microdilution en milieu liquide ont été utilisées pour évaluer l’effet antimicrobien. Une étude en subaigüe était réalisée afin d’explorer les effets toxiques de l’extrait aqueux des feuilles. Les résultats des tests antimicrobiens montrent une activité des extraits de feuilles et tige de J. multifida sur la croissance des souches utilisées avec des diamètres de zones d’inhibition allant de 8 à 25 mm et des concentrations minimales inhibitrices (CMI) variant de 0,039 mg/mL à 1,25 mg/mL à l’exception des souches de E. coli qui sont résistantes aux extraits de la tige. L’administration en subaigüe de l’extrait aqueux des feuilles de J. multifida à la dose de 600 mg/kg entraîne une perte significative de poids chez les souris. Conclusion et applications des résultats : Les extraits aqueux, éthanolique et hydroéthanolique des feuilles et tige de J. multifida possèdent d’activité antimicrobienne et pourraient être utilisés dans le traitement des Candidoses à C. albicans et des infections à S. aureus. Mais l’essai de toxicité subaigüe montre que l’extrait aqueux de la plante serait toxique. Des études toxicologiques approfondies restent donc nécessaires sur ces extraits afin de mieux élucider leur inocuité. Mots-clés : Jatropha multifida, extraits de feuilles et de tige, activités antifongique et antibactérienne, toxicité. Agban et al., J. Appl. Biosci. 2020 Evaluation du potentiel antimicrobien et de la toxicité des extraits de Jatropha multifida Linn, (Euphorbiaceae) 15551 Evaluation of antimicrobial potential and toxicity of Jatropha multifida Linn, (Euphorbiaceae) extracts ABSTRACT Objective: The objective of this study was to evaluate in vitro the antimicrobial activity of leaves and stem of Jatropha multifida extracts against Candida albicans, Escherichia coli and Staphylococcus aureus, and then to evaluate in vivo the toxicity of this plant. Methodology and Results: The agar well-diffusion and the NCCLS broth microdilution methods were used to assess the antimicrobial effect. A subacute study was carried out to explore the toxic effects of the aqueous extract of the leaves. The results of the antimicrobial tests show an activity of the extracts of leaves and stems of J. multifida on the growth of the strains used with diameters of inhibitory zones ranging from 8 to 25 mm and minimum inhibitory concentrations (MIC) varying from 0.039 mg/mL to 1.25 mg/mL exception E. coli strains which are resistant to extracts from the stem. Subacute administration of the aqueous extract of the leaves of J. multifida at a dose of 600 mg/kg leads to a significant loss of weight in the mice. Conclusion and application of findings : The aqueous, ethanolic and hydroethanolic extracts of the leaves and stem of J. multifida have antimicrobial activity and could be used in the treatment of Candidiasis and bacterial infections due respectively to C. albicans and S. aureus. But the subacute toxicity test shows that the aqueous extract of the plant would be toxic. Extensive toxicological studies therefore remain necessary on these extracts in order to better elucidate their safety. Keywords: Jatropha multifida extracts of leaves and stem, antifungal and antibacterial activities, toxicity
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Mohammed, B., M. M. Adua, S. E. Alu, D. Gambo, S. I. Musa, and R. A. Ofukwu. "Comparative efficacy of amprolium and crude extracts of Prosopis africana leaf for the treatment of West African dwarf goats infected with coccidial oocysts." Nigerian Journal of Animal Production 49, no. 1 (February 25, 2022): 124–30. http://dx.doi.org/10.51791/njap.v49i1.3410.

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This study aimed at evaluating the comparative efficacy of amprolium and crude extracts of Prosopis africana (Iron tree) leaves in the treatment of West African dwarf goats infected with coccidial oocysts. The efficacy of amprolium, aqueous and methanolic extracts were tested using a total of 20 West African dwarf goats (WAD) of both sexes. The goats were randomly divided into five groups comprising of four goats each for amprolium, aqueous and methanolic extracts. Coccidial oocyst count reduction per gram of faeces was determined. Data collected were subjected to one-way analysis of variance (ANOVA) procedure in SPSS software version 22. The ever increasing cases of coccidiosis in goat's especially young goats have continued to be a source of worry for rural livestock farmers. This is so because they could not afford the available synthetic anticoccidial due to high cost and the chemical residue concerned in animal products and environmental pollution have awaken interest in medicinal plants as an alternative anticoccidial. The result revealed the presence of flavonoids, Saponins and tannins in all the extracts but absence of alkaloids in fresh and dried aqueous extracts except methanolic extract and also absence of glycosides in all the extracts. Maximum percent oocyst count reduction of 93.54% and 99.38% on day six and day eight post treatments (PT) were recorded in goats treated with 100mg/kg b.w. of the fresh leaves aqueous extract and amprolium respectively. It was concluded that the leaves extracts of Prosopis afracana had anticoccidial efficacy that is comparable with the amprolium. Cette étude visait à évaluer l'efficacité comparative de l'amprolium et des extraits crus de feuilles de Prosopis africana (arbre de fer) dans le traitement des chèvres naines d'Afrique de l'Ouest infectées par des oocystes coccidiaux. L'efficacité des extraits d'amprolium, aqueux et méthanolique a été testée sur un total de 20 chèvres naines d'Afrique de l'Ouest (NAO) des deux sexes. Les chèvres ont été réparties au hasard en cinq groupes comprenant chacun quatre chèvres pour les extraits d'amprolium, aqueux et méthanolique. La réduction du nombre d'oocystes coccidiens par gramme de matières fécales a été déterminée. Les données recueillies ont été soumises à une procédure d'analyse de variance à un facteur (ANOVA) dans la version 22 du logiciel SPSS. En effet, ils ne pouvaient pas se permettre l'anticoccidien synthétique disponible en raison du coût élevé et les résidus chimiques concernés dans les produits animaux et la pollution de l'environnement ont suscité l'intérêt pour les plantes médicinales comme anticoccidien alternatif. Le résultat a révélé la présence de flavonoïdes, de saponines et de tanins dans tous les extraits mais l'absence d'alcaloïdes dans les extraits aqueux frais et séchés à l'exception de l'extrait méthanolique et également l'absence deglycosides dans tous les extraits. Le pourcentage maximum de réduction du nombre d'oocystes de 93,54 % et de 99,38 % au jour six et au jour huit après les traitements (AT) a été enregistré chez les chèvres traitées avec 100 mg/kg de poids corporel de l'extrait aqueux de feuilles fraîches et de l'amprolium respectivement. Il a été conclu que les extraits de feuilles de Prosopis afracana avaient une efficacité anticoccidienne comparable à celle de l'amprolium.
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Khan, Bilal Ahmad, Saima Anwar, Rizwan Maqbool Maqbool, Muhammad Mohsin Amin, Muhammad Mansoor Javaid, Amjed Ali, and Durrishahwar . "Assessing allelopathic potential of Sonchus oleraceus L. (milk thistle) on germination and seedling growth of Oryza puncta." JOURNAL OF WEED SCIENCE RESEARCH 27, no. 1 (March 29, 2021): 1–12. http://dx.doi.org/10.28941/pjwsr.v27i1.864.

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ABSTRACT Aqueous extracts of plants are used to control weeds and having no hazards to environment and are inexpensive. Present study was undertaken to investigate the effect of aqueous extracts of Sonchus oleraceus L. on the Oryza punctata L. emergence and initial seedling growth. It consists of aqueous extract of leaves, stem and fruit of S. oleraceus at varying concentrations 0.25, 0.50, 1, 2, 4 and 8 % (w/v) along with a distilled water control. The allelochemicals present in the aqueous extracts showed stimulatory, inhibitory and hormetic responses depending upon the concentration and the plant part. Results directed that maximum mean emergence time (5.26 days) and minimum germination index (1.67), germination percentage (40%), seedling fresh weight (59 g) and dry weight (8 g) of O. punctata were examined with 8% aqueous extract of S. oleraceus fruit. However, 4% aqueous extract of S. oleraceus fruit produced minimum root length (5.71). On the basis this experiment it was concluded that 8% aqueous extract of S. oleraceus fruit can be used for controlling O. punctata weed. Keywords: Aqueous extract, environment, allelochamicals, hermetic response, stimulatory ABSTRACT Aqueous extracts of plants are used to control weeds and having no hazards to environment and are inexpensive. Present study was undertaken to investigate the effect of aqueous extracts of Sonchus oleraceus L. on the Oryza punctata L. emergence and initial seedling growth. It consists of aqueous extract of leaves, stem and fruit of S. oleraceus at varying concentrations 0.25, 0.50, 1, 2, 4 and 8 % (w/v) along with a distilled water control. The allelochemicals present in the aqueous extracts showed stimulatory, inhibitory and hormetic responses depending upon the concentration and the plant part. Results directed that maximum mean emergence time (5.26 days) and minimum germination index (1.67), germination percentage (40%), seedling fresh weight (59 g) and dry weight (8 g) of O. punctata were examined with 8% aqueous extract of S. oleraceus fruit. However, 4% aqueous extract of S. oleraceus fruit produced minimum root length (5.71). On the basis this experiment it was concluded that 8% aqueous extract of S. oleraceus fruit can be used for controlling O. punctata weed. Keywords: Aqueous extract, environment, allelochamicals, hermetic response, stimulatory ABSTRACT Aqueous extracts of plants are used to control weeds and having no hazards to environment and are inexpensive. Present study was undertaken to investigate the effect of aqueous extracts of Sonchus oleraceus L. on the Oryza punctata L. emergence and initial seedling growth. It consists of aqueous extract of leaves, stem and fruit of S. oleraceus at varying concentrations 0.25, 0.50, 1, 2, 4 and 8 % (w/v) along with a distilled water control. The allelochemicals present in the aqueous extracts showed stimulatory, inhibitory and hormetic responses depending upon the concentration and the plant part. Results directed that maximum mean emergence time (5.26 days) and minimum germination index (1.67), germination percentage (40%), seedling fresh weight (59 g) and dry weight (8 g) of O. punctata were examined with 8% aqueous extract of S. oleraceus fruit. However, 4% aqueous extract of S. oleraceus fruit produced minimum root length (5.71). On the basis this experiment it was concluded that 8% aqueous extract of S. oleraceus fruit can be used for controlling O. punctata weed. Keywords: Aqueous extract, environment, allelochamicals, hermetic response, stimulatory
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Jesselyn Cua, Sharmaine, Marcelina Lirazan, and Michael Russelle Alvarez. "In vitro Antacid Screening of the Aqueous and Ethanolic Leaf Extracts of Ixora Coccinea (Linn). and Mimosa Pudica (Linn.)." Oriental Journal of Chemistry 34, no. 5 (October 18, 2018): 2246–52. http://dx.doi.org/10.13005/ojc/340504.

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Ixora coccinea L. (santan) and Mimosa pudica L. (makahiya) ethanolic and aqueous extracts were screened for their in vitro antacid potentials using the preliminary antacid test, determination of acid neutralization capacity, acid neutralizing effect, duration of consistent neutralization, and buffering capacity. Phytochemical screening and quantification of alkaloids were also done and the alkaloid content was correlated to the in vitro antacid potentials of the extracts. Among the extracts, the M. pudica aqueous extract gave the best preliminary antacid test result (1.0066±0.0083 pH) and acid neutralization capacity (0.0711±0.0038 mmol H+). Its aqueous extract showed comparable acid neutralizing effect (3.507% acid neutralized) on gastric juice with that of its ethanol extract (3.509% acid neutralized). On the other hand, the I. coccinea aqueous extract had the highest acid buffering capacity (0.0701±0.0020 mmol H+/pH). Both aqueous extracts gave the longest duration of neutralization with 9±1.732 minutes. All the extracts were tested positive for flavonoids, indoles, tannins, anthraquinones, anthrones, and alkaloids, with the I. coccinea aqueous extract having the highest alkaloid content (18.0282±1.2607% w alkaloid/w extract). This study provides the first reported proof of the antacid activities of I. coccinea and M. pudica. Further tests, including mouse model assays, are suggested to determine the efficacy of the extracts in vivo.
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Wang, Deng, Jingzhong Chen, Xue Xiong, Shu Wang, and Jiming Liu. "Allelopathic Effects of Cinnamomum migao on Seed Germination and Seedling Growth of its Associated Species Liquidambar formosana." Forests 10, no. 7 (June 26, 2019): 535. http://dx.doi.org/10.3390/f10070535.

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We examined allelopathic effects and underlying mechanisms of Cinnamomum migao on its associated species Liquidambar formosana. We assessed effects of aqueous extracts of C. migao pericarp, leaf, and rhizosphere soil at different concentrations on seed germination, seedling growth, and physiology of L. formosana. All extracts inhibited L. formosana seed germination, with obvious inhibition at high concentrations (50 mg mL−1). All extracts promoted the height and ground diameter of seedlings, with the highest promotion achieved with aqueous leaf extract at a concentration of 1 mg mL−1 and aqueous pericarp and rhizosphere soil extracts at a concentration of 5 mg mL−1. All extracts promoted soluble protein accumulation in L. formosana seedlings, with the highest accumulation achieved with aqueous pericarp extracts. Aqueous leaf extract promoted soluble starch accumulation. Aqueous pericarp extract at concentrations of >10 mg mL−1 significantly increased soluble sugar content. Aqueous leaf and rhizosphere soil extracts at concentrations of >5 mg mL−1 increased proline accumulation. All extracts at concentrations of >1 mg mL−1 significantly increased malondialdehyde content. Aqueous pericarp and rhizosphere soil extracts at concentrations of 10 and 0.5 mg mL−1, respectively, promoted superoxide dismutase activity. Activities of soil urease, polyphenol oxidase, and catalase were significantly increased when the concentration of aqueous pericarp and leaf extracts exceeded 5 mg mL−1, and the activity of soil acid phosphatase significantly increased when the concentration of all extracts were 5 mg mL−1. According to the synthetic allelopathic index, the low- and medium-concentration extracts all showed a promoting effect, whereas high concentrations exhibited obvious inhibitory effects; furthermore, the comprehensive effect value of leaf water extraction was higher than that of the pericarp and rhizosphere soil. Thus, allelopathy can affect the long-term co-existence of C. migao and L. formosana.
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Khardesh, Amani Ahmed F., Hitham Qasem M. Hadi, and Khaled Saeed Ali. "Antibacterial Activity of Aloe Lanata and Aloe Vacillanis Plant Extracts." Electronic Journal of University of Aden for Basic and Applied Sciences 1, no. 1 (March 7, 2020): 20–24. http://dx.doi.org/10.47372/ejua-ba.2020.1.6.

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This study was conducted to evaluate the antibacterial effect of the aqueous and Methanolic extracts of Aloe Lanata and Aloe Vacillanis. Using agar diffusion method, three different concentrations of Aloe extracts were evaluated on Staphylococcus aureus, Escherichia. coli, Pseudomonas aeruginosa, and to compare the effectiveness of extracts with some antibiotics (Ampicillin: Amp, Erythromycin: Erytho, Gentamycin: Genta).The extracts showed that there was a different effect on the bacterial species according to the type and concentration of the plant extract as well as the inhibitory response to the bacterial species. The aqueous and alcoholic extract of A. lanata is more potent than A. vacillanis extract. In comparison to the type of extract, the alcoholic extract of A. lanata was more effective than the aqueous extract, while the aqueous extract of the A. vacillanis showed higher efficacy than the alcoholic extract. Both extracts had the most substantial effect on both E. coli and P. aeroginosa and were less effective on S. aureus. Antibacterial efficacy of studied plant extracts showed better efficacy than the antibiotic (Ampicillin, Erythromycin) on Staphylococcus aureus and E. coli.
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Jain, I., P. Jain, D. Bisht, A. Sharma, B. Srivastava, and N. Gupta. "Use of Traditional Indian Plants in the Inhibition of Caries-Causing Bacteria - Streptococcus mutans." Brazilian Dental Journal 26, no. 2 (April 2015): 110–15. http://dx.doi.org/10.1590/0103-6440201300102.

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The aim of the study was to comparatively evaluate the antibacterial activity of six Indian plant extracts and 0.2% chlorhexidine against clinical strains of Streptococcus mutans, which were isolated from the plaque samples of 45 pediatric patients. Six plant extracts were prepared in three different forms, namely aqueous extracts, organic solvent-based extracts and crude (raw) extracts. The antimicrobial sensitivity testing was done by agar well diffusion method. Antimicrobial activity of the extracts was determined by measuring the mean zones of inhibition (mm) produced against the bacterial isolates. Results showed that crude garlic extract exhibited greater antibacterial activity than chlorhexidine. Aqueous extract of amla and organic solvent-based extract of ginger showed the maximum antibacterial activity against S. mutans, whereas aqueous extract of tulsi and organic solvent based extract of amla showed the minimum antibacterial activity. This study suggests that plant extracts like garlic in crude form, amla as aqueous infusion and ginger as alcoholic tincture have potential for the control of S. mutans. These extracts can be used as an alternative remedy for dental caries prevention or in the form of mouthwash, which is safe and economical.
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Mahboubi, Mohaddese, Atefeh Mahboubi, and Nastaran Kazempour. "The antimicrobial activity of Prunella vulgaris extracts." Herba Polonica 61, no. 1 (March 1, 2015): 31–38. http://dx.doi.org/10.1515/hepo-2015-0008.

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Summary Prunella vulgaris ( Labiatae family) or self-heal is traditionally used for different ailments such as eye pain and inflammation, headache, dizziness, sore throat and wound healing. Total phenolic and total flavonoid contents of extracts (methanol, ethanol and aqueous) were determined by a spectrophotometer. The antimicrobial activity was evaluated by micro broth dilution assay. The total phenolic content of P. vulgaris extracts were higher in aqueous extract (156.5 mg GAC/g) followed by ethanol extract and methanol extract. The TFC content of P. vulgaris methanol extract (82.8 mg QE/g) was higher than ethanol extract (22.7 mg QE/g) and aqueous extract (16.2 mg QE/g). The antimicrobial activity of methanol or ethanol extracts was higher than aqueous extract from P. vulgaris. The sensitivity of microorganisms to different extracts is related to type of pathogens. There is no positive relation between total phenolic content and its antimicrobial activity. Prunella vulgaris ethanolic extract as a source of phenolic and flavonoid contents can be used as an antimicrobial agent.
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Ziagova, Maria G., Charoula Mavromatidou, Georgios Samiotis, and Elisavet Amanatidou. "Enhancing Phenolic Content of Medicinal Aromatic Plants Extracts-Biofunctional Foods Preparation." Plants 11, no. 1 (December 27, 2021): 76. http://dx.doi.org/10.3390/plants11010076.

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In this study, the assessment of TPC and antioxidant activity enhancement of medicinal and aromatic plant (MAP) aqueous extracts using natural sweeteners or encapsulation materials was carried out. MAP extracts fortified with polyphenols were used to produce biofunctional chocolate bites. Honey or erythritol added to Melissa officinalis concentrated aqueous extracts exhibited TPC at 19.53 mg GAE/mL and 18.24 mg GAE/mL, respectively, and DPPH radical scavenging activity greater than 82%, comparing to its non-concentrated aqueous extract (3.74 mg GAE/mL and 72.9%, respectively). Honey added to MAP concentrated aqueous extract mixtures presented up to twofold higher TPC compared to M. officinalis concentrated aqueous extracts with honey. Chocolate bites with MAP concentrated aqueous extract mixtures and honey exhibited TPC and DPPH radical scavenging activity at 29.48 mg GAE/g chocolate and 93.7%, respectively. The addition of gum arabic or inulin in MAP concentrated aqueous extract mixtures increased the TPC up to 12-fold (40.37 mg GAE/mL and 34.14 mg GAE/mL, respectively) compared to its non-concentrated aqueous extracts (3.38 mg GAE/mL), whereas DPPH radical scavenging activity approached 99.5%. Honey incorporation as a sweetener and polyphenolic compound encapsulation in gum arabic can lead to the production of biofunctional foods with elevated cytoprotective action without compromising their organoleptic attributes.
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Dissertations / Theses on the topic "Aqueous extracts"

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Basson, Ilana Alison. "Stability of freeze-dried aqueous and other modified extracts of Leonotis leonurus." University of the Western Cape, 2017. http://hdl.handle.net/11394/5646.

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Magister Pharmaceuticae - MPharm
Leonotis leonurus, a South African indigenous medicinal plant, is frequently used in the form of a tea. However, this dosage form has many disadvantages. Consequently three L. leonurus solid extract preparations were prepared and explored as possible replacements of the tea form, but very little was known about their physical and chemical stability during storage. The specific objectives were to: (i) prepare a freeze dried aqueous extract (FDAE), 20 % aqueous ethanol (Aq EtOH) extract and calcium alginate beads of the FDAE form of L. leonurus, (ii) characterize the extracts using parameters of select physical and chemical features and, (iii) determine the long-term stability of the extracts. It was hypothesised that the Aq EtOH extract would contain higher levels of chemical marker compounds (marrubiin and leonurine) than the FDAE and calcium alginate FDAE beads of L. leonurus and, that the calcium alginate FDAE beads would have greater stability (i.e. longer shelf-life) than the FDAE and the Aq EtOH extract. The three L. leonurus solid extracts were prepared using accepted published methods. For the physical characterization of the extracts, the organoleptic properties were determined using the natural senses (e.g. sight, smell, taste, etc.) and for chemical characterization, total phenol content (TPC; using the Folin-Ciocalteu reagent method), total flavonoid content (TFC; using aluminium chloride-methanol solution) and antioxidant activity (using the -diphenyl-2-picryl-hydrazyl (DPPH) assay). To establish the long-term stability of the preparations, encapsulated L. leonurus solid extracts was stored in sealed standard plastic containers at four conditions: (A), room temperature of 24 ˚C ± 5 ˚C; (B), fixed temperature of 30˚C ± 5 ˚C and (C), elevated temperature of 40˚C ± 5 ˚C for 6 months, and (D), accelerated stability test conditions of 40˚C ± 5 ˚C / 75 % RH for 4 weeks. Samples of the stored encapsulated preparations were collected periodically and assessed for changes in organoleptic properties, TPC, TFC, antioxidant activity levels and marker compound (i.e. marrubiin and leonurine) levels. The latter was determined by validated HPLC assay. Yields of 19.9, 12.82 and 10.7 % of FDAE, Aq EtOH extract and calcium alginate FDAE beads were obtained, respectively. Physically the calcium alginate beads contained less moisture (1.86 %) than the FDAE (3.77 %) and Aq EtOH (2.91 %). Chemically the FDAE, Aq EtOH extract and calcium alginate FDAE beads respectively had appreciable and similar TPC (i.e.7.86, 7.52 &, 6.94 mg GAE/g; p > 0.05; Anova) and TFC (i.e. 4.30, 4.47 & 3.67 mg QE/g; p > 0.05; Anova) levels, but variable amounts of marrubiin (i.e. 22.5, 17.5, and 0.4 ug/mg plant extract) and leonurine (i.e. 2.0, 1.4 and 0.7 ug/mg plant extract), respectively. The antioxidant activity levels were also different i.e. EC50 values of 7.71, 6.66 and 11.53 mg/mL (student t-test p-value of < 0.0001; ANOVA-test; p< 0.05) for the FDAE, Aq EtOH extract and calcium alginate FDAE beads, respectively. During storage (i.e. stability study) the L. leonurus solid extracts generally remained physically unaffected by temperature (i.e. no significant change in organoleptic features), but when exposed to humidity the FDAE and Aq EtOH extracts showed clear signs of physical degradation i.e. changed from being flaky powders to sticky melted masses, while the calcium alginate beads remained unchanged. Within 1 month storage at RT, 30 °C, 40 °C and 1 week at 40 °C / 75 % RH the TPC of the encapsulated FDAE decreased significantly by 61, 60, 58 and 52 %, respectively, that for the encapsulated Aq EtOH extract by 61, 54, 46 and 50 %, respectively, and for calcium alginate FDAE beads by 66, 71, 59 and 57 %, respectively. Using TPC as a stability parameter all three encapsulated extracts had very short shelf-lives ranging from 1.24 weeks (0.31 months) to 3.72 weeks (0.93 months). Under the same conditions and storage periods (i.e. 1 month & 1 week) the TFC of the encapsulated FDAE decreased significantly by 25, 25, 29 and 66 %, respectively, for encapsulated Aq EtOH extract by 26, 26, 23 and 70 %, respectively, and the calcium alginate FDAE beads by 55, 55, 52 and 64 %, respectively. The results obtained for TFC was thus similar to that obtained for the TPC data. Based on the TFC data all three encapsulated extracts had very short shelf-lives ranging, from 1.56 weeks (0.39 months) to 6.76 weeks (1.69 months). Under the same conditions and storage periods (i.e. 1 month & 1 week) as that used to determine TPC and TFC, the antioxidant activity of the extracts changed little, i.e. decreased by 0.2, 0.1, 0.8 and 2 %, respectively for FDAE, by 0.7 %, 1 %, 0.1 % and 5.3 %, respectively for the Aq EtOH and by 2, 2, 1.4 and 0.8 %, respectively for the calcium alginate FDAE beads. Moreover, based on antioxidant activity, all three encapsulated extracts had relatively long shelf-lives ranging from 15.6 weeks (3.9 months) to 22.4 weeks (5.6 months). Finally, the determination of the stability of the encapsulated L. leonurus extracts stored under stress conditions (i.e. 40 °C / 75 % RH) and based on marker compound levels was unresolved. Between the time of extract preparation and characterisation until start of the stability study the marrubiin levels in the FDAE, Aq. ETOH and calcium beads had decreased from 22.5, 17.5, and 0.4 ug/mg plant extract, respectively, to 0.30, 0.11, 0.30 μg/mg, respectively, and the leonurine levels from 2.0, 1.4 and 0.7 to 0.46, 0.38 and 0.09 μg/mg, respectively and was too low to conduct a meaningful stability study with the developed validated assay. Overall, all three the encapsulated L. leonurus solid extracts studied were clearly very unstable and did not have suitable long-term storage stability. The modification of the freeze-dried aqueous extract of L. leonurus into a calcium alginate bead form seemed to combat physical instability but did not improve the chemical instability of the aqueous extract. It is therefore recommended that the addition of excipients or other post extract modification (e.g. production of phytosomes) be explored to combat the hygroscopicity of L. leonurus FDAE and ultimately improve its overall product stability.
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Wang, Bo. "Effects of natural and cultured Cordyceps aqueous extracts on RAW 264.7 macrophage function." Thesis, University of Macau, 2009. http://umaclib3.umac.mo/record=b2158149.

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Bu-Abbas, Ali H. A. "Antimutagenic potential of aqueous tea extracts towards selected environmental carcinogens : mechanisms of action." Thesis, University of Surrey, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389318.

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Coelho, Maria Teresa Pita Pegado Gonçalves Rodrigues. "Estudos de propagação in vitro, caracterização e valorização de carqueja (Pterospartum tridentatum (L.) Willk)." Doctoral thesis, ISA/UL, 2015. http://hdl.handle.net/10400.5/9271.

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Doutoramento em Engenharia Alimentar - Instituto Superior de Agronomia
The aim of this work was to develop methodologies for micropropagation and extraction of bioactive compounds from both wild gorse (Pterospartum tridentatum L.) and micropropagated gorse explants, as a means of valorisation of this species. Micropropagation was very effective on large scale propagation, having multiplication rates ranging from 1.6 to 43.9; number of shoots ranging from 1.5 to 10.4 and rooting above 96.7%. The extraction yield of aqueous extraction varied from 10.5 to 19.4 and 12.2 to 30.1% (w/w) for wild gorse and micropropagated gorse explants, respectively. Aqueous extracts showed high levels of total phenols, from 203.4 to 369.2 and 104.1 to 121.3 mg gallic acid eq g-1 ms, and FRAP antioxidant activity: 256-856 and 160-260 mmolFe2+ 100g-1 ms; DPPH: 1433-1551 and 1503-1509 mM Trolox 100g-1 ms for wild gorse and micropropagated gorse explants, respectively. Extracts showed no antifungal activity. However, these extracts showed inhibition of Bacillus subtilis, Pseudomonas aeruginosa and Staphylococcus aureus. Chitosan bioactive coatings with gorse extracts improved cherry postharvest preservation ability. The results allow topropose these methodologies to obtain extracts with bioactive properties from micropropagated material, without depleting natural resources
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Solco, Avery Kent Sia. "Accelerated shelf-life test of alkamides in Echinacea purpurea root aqueous ethanol Soxhlet extracts." [Ames, Iowa : Iowa State University], 2007.

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Akpoveso, Oke-Oghene Philomena. "An investigation of antioxidant and antidiabetic effect of aqueous leaf extracts of Mucuna pruriens." Thesis, University of Brighton, 2016. https://research.brighton.ac.uk/en/studentTheses/c6c582e9-83d1-4e4d-b708-ee831fbe80cb.

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Diabetes is currently a wide spread global disease. As a result of the side effects of the current therapies, herbal plants may present alternative source of drugs for management of the disease. Mucuna pruriens is a plant that is traditionally used for diabetes and anaemia. There are experimental reports of the hypoglycaemic effect of the alcoholic extracts but the anti-diabetic effects of the aqueous extract has not been investigated. Therefore, the aim of this project was to investigate the potential anti-diabetic mechanisms of the aqueous extract of Mucuna pruriens leaves. The leaf extract was prepared by decoction. The potential mechanisms of anti-diabetic effect of this extract was evaluated as follows: Antioxidant activity of the aqueous Mucuna pruriens leaf extract was investigated in reduced β-nicotinamide adenine dinucleotide (NADH)/phenazine methosulphate (PMS), and Xanthine /Xanthine oxidase superoxide generating systems. In addition, the effect of aqueous Mucuna pruriens leaf extract against oxidative stress was measured as cytoprotective effect of the extract against paraquat induced oxidant injury in NRK-52E renal cells. Cytoprotective effect was measured as cell viability and cell death using 3-(4,5-Dimethylthiazol-2-Yl)-2,5 Diphenyltetrazolium Bromide (MTT) and Lactose dehydrogenase (LDH) assays respectively. Finally the effect of aqueous Mucuna pruriens leaf extract on glucose uptake was evaluated in NRK-52E renal cells and 3T3-L1 adipocytes. The results revealed that aqueous Mucuna pruriens leaf extract had significant superoxide scavenging activity which increased from 21.35% to 99.8% in xanthine/xanthine oxidase and 36.15% to 62.4% in NADH/PMS superoxide generating systems at p < 0.05. However, aqueous Mucuna pruriens leaf extract did not protect against paraquat induced oxidative stress. Data from glucose uptake experiments showed that 1mg/ml of aqueous Mucuna pruriens leaf extract inhibited glucose uptake in NRK-52E renal by 35.5% compared to control at p < 0.05. This effect was comparable to 1mM Phloridzin (a non- selective inhibitor of sodium glucose transporters). Finally, 50 and 100μg/ml of both aqueous Mucuna pruriens leaf extract and its acid hydrolysed fractions prepared with liquid-liquid partitioning in diethyl ether, stimulated glucose uptake in 3T3-L1 adipocytes. Specifically, 50 and 100μg/ml aqueous Mucuna pruriens leaf extract stimulated glucose uptake be 57.06 and 86.24% respectively compared to negative control at p < 0.05. Increase in glucose uptake was also observed in cells treated with diethyl ether acid hydrolysed fractions. Taken together, the results show that aqueous the Mucuna pruriens leaf extract used in this study may exert anti-diabetic effects via antioxidant and glucose uptake modulatory mechanisms.
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Norlin, Elin. "Nitrogen isotope analysis of ammonium and glycine : method development for aqueous solutions and soil extracts /." Umeå : Dept. of Forest Ecology, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200584.pdf.

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Pimenta, Ana Catarina Mendes. "Extractos aquosos de Pterospartum tridentatum L. teor de compostos fenólicos totais e actividade antioxidante." Master's thesis, ISA/UTL, 2012. http://hdl.handle.net/10400.5/5310.

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Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia
Carqueja, Pterospartum tridentatum L., is a shrub common in mountainous areas and acids land, used in traditional medicine and gastronomy. In order to evaluate the eventual production of extracts of this plant, the effect of harvest period and extraction time on yield, phenolic content (PC) and antioxidant activity (AA) of the extracts was studied. Plant samples, harvested in Malcata and Gardunha mountains, were subjected to consecutive extraction steps in boiling water. After each step the aqueous phase was recovered and liophilized. The highest yield extraction was obtained in the dormancy period, with 46 and 25 % m/m (d.m) in plants of Malcata and Gardunha. It was observed at 120minutes the mass of extract recovered was on average more than 75%. No substantial variation of PC, evaluated by measuring the absorbance at 280nm in aqueous solutions, was observed throughout the consecutive extracts. PC ranged from 245 to 400 mg gallic acid equivalents per g (d.m.). Probably different phenolic compounds are extracted at different rates and there are other compounds co-extracted. The AA was determined by the radical scavenging activity method using 2,2-diphenyl-1-picrylhydrazyl radical. The greatest radical scavenging activity was observed in the flowers extracts (2mMTrolox/100g d.m.), no significant differences were observed for the different batches. Due to its AA the results suggest the interest on the production of carqueja extracts.
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Chen, Yen-Ling. "Binding interaction between volatiles and soy proteins in soymilk and aqueous systems of selected soy protein extracts /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1422916.

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Hampsch, Alyson. "Using Aqueous Soil Extracts to Study Organic Matter Leaching From Soils of Different River Corridor Land Covers in Vermont." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/660.

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Soils represent an important terrestrial carbon (C) sink, storing up to three times the amount of atmospheric C, however climate and land use changes may transform soils into C sources. River corridor (RC) soils and associated C are at risk to become mobilized by erosion such as bank failure and scour events. Once soil-derived organic C is transferred into the stream, microbial processes and photodegradation of the dissolved, labile (or bioavailable) fractions can lead to the production of CO2, which can evade and increase atmospheric CO2 levels. Because predicted increases in heavy precipitation will likely increase this type of riverine erosion, it is important to better understand the potential for the release of bioavailable C from RCs. One objective of this thesis was therefore to identify and characterize representative samples of soils from a typical Vermont RC for common land covers and simulate the production of dissolved organic matter (DOM) during riverine soil erosion. Field sites representative of typical agricultural and forested land uses were selected based on the analysis of 106 existing samples and resampled multiple times over the summer of 2015. Production of DOM from riverine erosion was simulated using aqueous soil extracts (ASE), where soil and water were shaken at fixed ratios followed by the separation of the extract. To study the characteristics of these extracts (which serve as analogue of stream water after erosion), water extractable C (WEOC) concentrations, water extractable nitrogen, fluorescence properties of DOM, and bioavailability were determined. Results indicated a common, dominantly terrestrial source material for all land covers, but C concentrations and fluorescence properties differed. High but variable amounts of soil organic C and WEOC were observed in agricultural riparian and agricultural stream bank samples, and lower concentrations in agricultural field, forest, forest riparian, and forest stream banks. WEOC bioavailability was high in all agricultural land covers and low in forested land covers. Because this study is the first in which ASE are used as analogues for stream water after riverine erosion, a second objective was to test laboratory methods used in this study for their effect on WEOC, fluorescence properties, and bioavailability. Specifically, the effects of soil drying, soil storage, and the effects of the extraction solution were tested. For this, ASE were prepared from soils that were field moist, dried, and after two years of storage. In addition, dried soils were extracted using different solutions including a salt solution, river water, and double deionized (DDI) water. Results indicated WEOC concentration and microbial humic-like fluorescence from extracts of dried soils were higher than those in extracts of field moist soils, while WEOC concentration and microbial humic-like fluorescence was highest in extracts of soils stored long term. In addition, the bioavailability of WEOC was higher in dried soils than field moist soils. The extraction solutions of DDI water and river water produced DOM with similar fluorescence properties, while the salt solution extracted a different, less humified pool of C. Overall, the ASE methods used in this study are effective in simulating stream bank erosion and subsequent C release into stream water, however the effects of drying the soils need to be considered when assessing DOM.
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Books on the topic "Aqueous extracts"

1

McLaughlin, J. R. Background to the measurement of the ph of aqueous extracts of wool. Christchurch: WRONZ, 1996.

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Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.

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Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.

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Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.

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Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.

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Edgell, Kenneth. USEPA method study 38 SW-846 method 3010 acid digestion of aqueous samples and extracts for total metals for analysis by flame atomic absorption spectroscopy. Cincinnati, OH: U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory, 1989.

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Laatikainen, Markku. Stability of aqueous emulsions of synthetic and extracted wood pitches. Lappeenranta: Lappeenranta University of Technology, 1992.

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Canada. Environment Canada. Inland Waters Directorate. Design and Testing of an Aqueous Phase Liquid-Liquid Extractor (Aple) For the Determination of Organochlorine Contaminants. S.l: s.n, 1985.

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Moghaddam, Shokoufeh Nikpour. Effects of Aqueous Extract of Saffron and Curcumin: At the Amount of Gamma-amino butyric acid in Rat's Hypothalamus. Noor Publishing, 2022.

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Golshekan, Hamid Reza. The kinetics of the extraction of cobalt in a growing drop cell: Organophosphorus acids in growing solvent drops are used to extract cobalt from aqueous phases. A mathematical model describesvariation of extraction rate with concentration, pH and acid type. Bradford, 1986.

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Book chapters on the topic "Aqueous extracts"

1

Quinn, Ronald J. "Chemistry of Aqueous Marine Extracts: Isolation Techniques." In Bioorganic Marine Chemistry, 1–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-48346-2_1.

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Subramanian, L., Koshy Obey, and Thomas Sabu. "Phytosynthesis of Cu And Fe Nanoparticles using Aqueous Plant Extracts." In Polymeric and Nanostructured Materials, 141–52. Oakville, ON ; Waretown, NJ : Apple Academic Press, 2019. |: Apple Academic Press, 2018. http://dx.doi.org/10.1201/b22428-10.

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Makaza, K., M. Matigimu, and N. Sakadzo. "Aqueous Leaf Extracts of Sunflower (Helianthus annuus) for Weed Management." In Climate Change Adaptations in Dryland Agriculture in Semi-Arid Areas, 145–55. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7861-5_10.

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Maneein, Supattra, John J. Milledge, and Birthe V. Nielsen. "Enhancing Methane Production from Spring-Harvested Sargassum muticum." In Springer Proceedings in Energy, 117–23. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_15.

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AbstractSargassum muticum is a brown seaweed which is invasive to Europe and currently treated as waste. The use of S. muticum for biofuel production by anaerobic digestion (AD) is limited by low methane (CH4) yields. This study compares the biochemical methane potential (BMP) of S. muticum treated in three different approaches: aqueous methanol (70% MeOH) treated, washed, and untreated. Aqueous MeOH treatment of spring-harvested S. muticum was found to increase CH4 production potential by almost 50% relative to the untreated biomass. The MeOH treatment possibly extracts AD inhibitors which could be high-value compounds for use in the pharmaceutical industry, showing potential for the development of a biorefinery approach; ultimately exploiting this invasive seaweed species.
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Sherkat, F., S. K. Razavi, and B. Karatzas. "Protein Recovery and Trypsin Inhibitor Removal from Aqueous Extracts of Soy Flour." In Plant Proteins from European Crops, 279–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03720-1_47.

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Deng, Wuyuan. "Antimicrobial Effects of Aqueous Extracts Obtained from Fallen Leaves of Ginkgo biloba." In Proceedings of the 2012 International Conference on Applied Biotechnology (ICAB 2012), 401–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37916-1_41.

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Pinheiro, Joaquina, Elsa M. Gonçalves, and Rui Ganhão. "Potential Use of Aqueous Extracts of Kombu Seaweed in Cream Cracker Formulation." In Food Engineering Series, 171–86. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61817-9_9.

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Tănase, Luiza-Andreea, Oana-Viorela Nistor, Doina-Georgeta Andronoiu, Dănuț-Gabriel Mocanu, Sorin Ciortan, Elena Ioniță, Andreea Veronica Botezatu Dediu, Elisabeta Botez, and Bogdan Ioan Ștefănescu. "Galactogogue Herbs: Antioxidant Activity and Bioactive Compounds’ Content Determined from Aqueous Extracts." In 10th Central European Congress on Food, 128–45. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04797-8_12.

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Gajdoš Kljusurić, J., A. Jurinjak Tušek, D. Valinger, M. Benković, and T. Jurina. "Multi-criteria Decision Analysis: Linear and Non-linear Optimization of Aqueous Herbal Extracts." In Multicriteria Analysis in Agriculture, 167–84. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76929-5_7.

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Nakamura, Yoshiyuki, Mamoru Isemura, Sumio Hayakawa, Kouichi Saeki, Yu Koyama, Takashi Kimura, Masanori Kuroyanagi, Tadataka Noro, Kyoji Yoshino, and Toshihiro Tsuneyoshi. "Inhibition of Carcinogenesis by Tea Aqueous Non-Dialyzates Fractionated from Crude Tea Extracts." In ACS Symposium Series, 381–89. Washington, DC: American Chemical Society, 2003. http://dx.doi.org/10.1021/bk-2003-0851.ch033.

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Conference papers on the topic "Aqueous extracts"

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Stojanova, Monika, Dragutin Djukic, Marina Todor Stojanova, Aziz Şatana, and Blazo Lalevic. "DETERMINATION OF ANTIBACTERIAL POTENTIAL OF AGARICUS MACROSPORUS AND RUSSULA VESCA MUSHROOM EXTRACTS." In XXVII savetovanje o biotehnologiji. University of Kragujevac, Faculty of Agronomy, 2022. http://dx.doi.org/10.46793/sbt27.477s.

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The aim of this research was to determine the antibacterial potential ofaqueous and ethanolic extract of wild mushroom species: Agaricus macrosporus and Russulavesca. Extracts from R.vesca were characterized with higher values for total carbohydrates and total proteins. Both aqueous extracts had higher antibacterial activity compared to ethanolic extracts. Aqueous extract from R.vesca showed higher antibacterial activity against B. cereus (13.6mm), E.faecalis (12.1 mm), E. coli(16.7 mm) and P.aeruginosa (10.5 mm) compared to gentamicin or neomycin. This study represents a novel starting point for future researchin which mushroom extracts can be used in various industry fields.
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"Determination of Antioxidant Property, Total Phenolics Content, and α-Glucosidase Inhibitory Activity of Different Solvent Extracts of Defatted and Non-Defatted Peanut Skins." In 4th International Conference on Biological & Health Sciences (CIC-BIOHS’2022). Cihan University, 2022. http://dx.doi.org/10.24086/biohs2022/paper.781.

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Peanut skins are by-product with little economic value. The effect of different solvents, on the total phenolic content (TPC), antioxidant property and in vitro antidiabetic activity of defatted and non-defatted peanut skins was determined. TPC was estimated using Folin-Ciocalteau reagent. Antioxidant property was evaluated using ferric reducing antioxidant power (FRAP) and 2, 2-diphenyl-1- picrylhydrazyl (DPPH) radical scavenging capacity methods, α-glucosidase inhibition was evaluated using 4- nitrophenyl α-D-glucopyranoside (pNPG) method. Peanut skin of the defatted extracted with ethanol had the much of the content of total phenolics (391.76 mg/g GAE). Highest DPPH scavenging property was found in the methanolic extract of defatted peanut skins with IC50 value of 15.00 ± 1.00 μg/mL, while highest FRAP value was found in the aqueous extract of non-defatted extracts. Aqueous extracts demonstrated stronger inhibitory property against α-glucosidase and had IC50 of 16.33 ± 1.15 and 16.33 ± 8.50 μg/mL for defatted and non-defatted extracts, respectively. The finding of the present shows that peanut skins are important by-product for utilization as natural antioxidant and α-glucosidase inhibitors.
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Martins-Gomes, C., F. M. Nunes, and A. M. Silva. "Neuroprotective and antidiabetic activities of Thymus capitellatus aqueous extracts." In GA – 69th Annual Meeting 2021, Virtual conference. Georg Thieme Verlag, 2021. http://dx.doi.org/10.1055/s-0041-1736876.

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Dyshlyuk L.S., L. S., and N. V. Fotina N.V. "Antimicrobial activity of water-alcohol extracts of Hedysarum neglectum." In Растениеводство и луговодство. Тимирязевская сельскохозяйственная академия, 2020. http://dx.doi.org/10.26897/978-5-9675-1762-4-2020-7.

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Hedysarum neglectum is a promising source of biologically active substances that exhibit antimicrobial activity. We determined the antimicrobial activity of aqueous ethanol extracts of Hedysarum neglectum. The maximum activity is observed in the extract obtained at a temperature of 50 °C using 50 % ethyl alcohol.
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Nadzir, Masrina Mohd, Farhana Nazira Idris, and Khairunisa Hat. "Green synthesis of silver nanoparticle using Gynura procumbens aqueous extracts." In 6TH INTERNATIONAL CONFERENCE ON ENVIRONMENT (ICENV2018): Empowering Environment and Sustainable Engineering Nexus Through Green Technology. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5117140.

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Nauman, Kashif, and Muhammad Arshad. "Screening of aqueous methanol plant extracts for their antibacterial activity." In Proceedings of the International Conference on Antimicrobial Research (ICAR2010). WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814354868_0024.

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Thuvaragan, S., H. M. P. M. Jeyasinghe, and A. Murugananthan. "Comparative Evaluation of in - vitro Anthelmintic Activity of Sap, Fruit bulb, and Root of Borassus flabellifer." In 2nd International Conference on Public Health and Well-being. iConferences (Pvt) Ltd, 2022. http://dx.doi.org/10.32789/publichealth.2021.1011.

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Helminth infections are major health problems, especially in developing countries with warm and humid environments. Limited synthetic drugs are available for treating helminth infections, and some of them showed resistance to helminths. Phytoconstituents can be used to develop cheap and effective anthelminthic drugs. Borassus flabellifer has been used in traditional medicine, in addition to consuming as food. This study was designed to evaluate the comparative in vitro anthelmintic activities of aqueous and methanol extracts of root, fruit pulp, and sap of Borassus flabellifer using two different concentrations (50 and 100 mg/mL). Adult earthworms, Eisenia fetida was used to evaluate the in-vitro anthelmintic activity. In-vitro anthelmintic activity was evaluated by determining times of paralysis and the death of worms. The anthelminthic activity of extracts was compared with mebendazole, and earthworm saline was used as a control. ANOVA followed by Dunnett’s multiple comparison test was used to compare the activities of extracts with mebendazole. All extracts showed concentrations dependent activity. All extracts except aqueous extract of roots of Borassus flabellifer showed statistically significant in-vitro anthelminthic activity. Further studies are needed to isolate and evaluate the active components from the extracts of Borassus flabellifer.
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Kuzovkova, A. A., M. S. Turko, and T. P. Krymskaya. "MEASUREMENT METHOD OF AGIDOL-40, ACETOPHENONE, VULCACIT, SULPHENAMIDE C MASS CONCENTRATIONS IN WATER EXTRACTS FROM CONSUMER GOODS." In SAKHAROV READINGS 2022: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute of Belarusian State University, 2022. http://dx.doi.org/10.46646/sakh-2022-1-262-266.

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The determination of agidol-40, acetophenone, vulcacit, sulphenamide С in water extracts from consumer goods is carried out by high-performance liquid chromatography with detection at 240 nm and the method of absolute calibration. Previously, the substances are extracted twice from 50 cm3 of an aqueous extract with dichloromethane, 30 cm3 each, the resulting extract is concentrated under vacuum, the dry residue is dissolved in acetonitrile (1 cm3). A Nucleodur C18 Pyramid (Macherey-Nagel) column (250 mm x 3,0 mm, grain size 5,0pm; thermostat temperature 25 °С) is used as a stationary phase. A mixture of water with acetonitrile and 2-propanol in a ratio of 4:74:22 (v : v) is used as a mobile phase. The limit of quantitative detection of vulcacit in water extracts from consumer goods is 0,31 mg/dm3, sulphenamide С - 0,08 mg/dm3, agidol-40 - 0,13 mg/dm3, acetophenone - 0,02 mg/dm3.
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M.Hussein, Ali, Nadir Nanakali, and Mohammed M.Hussein. "EFFECT OF HYPERICUM PERFORATUM ON GASTRIC ULCER IN RAT." In 4th International Conference on Biological & Health Sciences (CIC-BIOHS’2022). Cihan University, 2022. http://dx.doi.org/10.24086/biohs2022/paper.742.

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Gastric ulcer is a chronic condition that occurs when the mucosa of the stomach is broken. There is a physiological equilibrium between aggressive factors and mucosal defense. This study aimed to determine the prevention level and efficiency of herbal medicinal plants (Hypericum perforatum) and compared with the omeprazole drug.Many groups were prepared from Albino male rats, first control group (inoculate with H. pylori and fed with standard pellet), Second group, rats inoculated by H. pylori and prevented with aqueous extract H. perforatum in two dosages (250mg/kg, 500mg/kg), Third group inoculated by H. pylori and prevented with standard drug omeprazole at the dose (20mg/kg).The result showed that H. perforatum inhibits (50.65%) stomach ulcer formation with a high dose. Omeprazole's' group results showed (24.50%) stomachs ulcer formation. Although the result of the current study improves, a high dosage of aqueous extracts of plants has more effectiveness than the low dosage of aqueous extracts of plants.
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Ismail, Nahlah Elkudssiah, Masdiana Abdul Samad, Tommy Joulianto Bustami Effendi, and Mizaton Hazizul Hasan. "Cytotoxicity studies of aqueous extracts of Curcuma longa and Quercus infectoria." In 2010 International Conference on Science and Social Research (CSSR). IEEE, 2010. http://dx.doi.org/10.1109/cssr.2010.5773882.

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Reports on the topic "Aqueous extracts"

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Toshkova-Yotova, Tanya, Ani Georgieva, Plamen Pilarski, and Reneta Toshkova. Aqueous Extracts of Green Microalga Coelastrella sp. BGV Display Antiproliferative and Proapoptotic Activity in Vitro against HeLa Tumour Cells. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, May 2021. http://dx.doi.org/10.7546/crabs.2021.05.07.

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Poole, Loree Joanne, and C. Judson King. Novel Regenerated Solvent Extraction Processes for the Recovery of Carboxylic Acids or Ammonia from Aqueous Solutions Part I. Regeneration of Amine-Carboxylic Acid Extracts. Office of Scientific and Technical Information (OSTI), March 1990. http://dx.doi.org/10.2172/937438.

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Crouch, Rebecca, Jared Smith, Bobbi Stromer, Christian Hubley, Samuel Beal, Guilherme Lotufo, Afrachanna Butler, et al. Preparative, extraction, and analytical methods for simultaneous determination of legacy and insensitive munition (IM) constituents in aqueous, soil or sediment, and tissue matrices. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41480.

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No standard method exists for determining levels of insensitive munition (IM) compounds in environmental matrices. This project resulted in new methods of extraction, analytical separation and quantitation of 17 legacy and 7 IM compounds, daughter products of IM, and other munition compounds absent from USEPA Method 8330B. Extraction methods were developed for aqueous (direct-injection and solid-phase extraction [SPE]), soil, sediment, and tissue samples using laboratory-spiked samples. Aqueous methods were tested on 5 water sources, with 23 of 24 compounds recovered within DoD QSM Ver5.2 limits. New solvent extraction (SE) methods enabled recovery of all 24 compounds from 6 soils within QSM limits, and a majority of the 24 compounds were recovered at acceptable levels from 4 tissues types. A modified chromatographic treatment method removed analytical interferences from tissue extracts. Two orthogonal high-performance liquid chromatography-ultraviolet (HPLC-UV) separation methods, along with an HPLC–mass spectrometric (HPLC-MS) method, were developed. Implementing these new methods should reduce labor and supply costs by approximately 50%, requiring a single extraction and sample preparation, and 2 analyses rather than 4. These new methods will support environmental monitoring of IM and facilitate execution of risk-related studies to determine long-term effects of IM compounds.
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Crouch, Rebecca, Jared Smith, Bobbi Stromer, Christian Hubley, Samuel Beal, Guilherme Lotufo, Afrachanna Butler, et al. Methods for simultaneous determination of legacy and insensitive munition (IM) constituents in aqueous, soil/sediment, and tissue matrices. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41720.

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Abstract:
Currently, no standard method exists for analyzing insensitive munition (IM) compounds in environmental matrices, with or without concurrent legacy munition compounds, resulting in potentially inaccurate determinations. The primary objective of this work was to develop new methods of extraction, pre-concentration, and analytical separation/quantitation of 17 legacy munition compounds along with several additional IM compounds, IM breakdown products, and other munition compounds that are not currently included in U.S. Environmental Protection Agency (EPA) Method 8330B. Analytical methods were developed to enable sensitive, simultaneous detection and quantitation of the 24 IM and legacy compounds, including two orthogonal high-performance liquid chromatography (HPLC) column separations with either ultraviolet (UV) or mass spectrometric (MS) detection. Procedures were developed for simultaneous extraction of all 24 analytes and two surrogates (1,2-dinitrobenzene, 1,2-DNB; o-NBA) from high- and low-level aqueous matrices and solid matrices, using acidification, solid phase extraction (SPE), or solvent extraction (SE), respectively. The majority of compounds were recovered from four tissue types within current limits for solids, with generally low recovery only for Tetryl (from 4 to 62%). A preparatory chromatographic interference removal procedure was adapted for tissue extracts, as various analytical interferences were observed for all studied tissue types.
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5

Ridhowati, Sherly. Evaluation of the safe consumption of aqueous extract of flour from Stichopus variegates. Biomedpress, November 2019. http://dx.doi.org/10.15419/arr.2019.4.

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Alale, Theophilus, Nelson Opoku, and Charles Adarkwah. The Efficacy of Aqueous False Yam (Icacina oliviformis) Tuber Extract Against Cowpea Aphids (Aphis craccivora Koch). Journal of Young Investigators, April 2017. http://dx.doi.org/10.22186/jyi.32.3.7-22-24.

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