Relevant bibliographies by topics / Antimicrobial phytochemicals

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Antimicrobial phytochemicals'

Author: Grafiati
Published: 19 February 2023
Last updated: 20 February 2023

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Journal articles on the topic "Antimicrobial phytochemicals"

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Kumar Shrestha, Bijay, Bidhya Dhungana, Jenish Shakya, Romika Shrestha, and Sujata Chauhan. "Phytochemical and Antimicrobial Screening of Bark Extract of Shorea robusta (Sal)." Nepal Journal of Biotechnology 10, no. 1 (July 30, 2022): 25–31. http://dx.doi.org/10.54796/njb.v10i1.227.

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Different parts of Shorea robusta (Sal) are being used in ancestral and ayurvedic medicines and are known to cure health ailments. The different phytochemicals present in S. robusta is known to possess antimicrobial property. The different botanical parts of this plant have been used in ayurvedic medicines to cure certain infectious diseases. The main aim of this study was to screen phytochemicals and antimicrobial activity of bark extract of S. robusta. Literatures were collected through books, journals and further additional information were collected from residents and traditional ayurvedic practitioners. The ethanolic bark extract of S. robusta was obtained through 70% ethanol in rotatory shaker for 72 hours at 37 ℃ and then the crude extract was dried, preserved and analyzed for phytochemical analysis and antimicrobial activity. The phytochemical screening of ethanolic extract of bark of S. robusta indicated presence of phytochemicals like, alkaloids, flavonoids, tannins, steroids, anthraquinone and absence of phlobatannins, terpenoids, starch and proteins. The extract of S. robusta on Staphylococcus aureus exhibited clear zone of inhibition of 21mm at minimum inhibitory concentration (MIC) of 2 mg/mL while on Escherichia coli exhibited clear zone of inhibition of 9 mm at MIC of 4 mg/mL. The antimicrobial activity may be conferred due to the presence of plant phytochemicals. S. robusta bark extract exhibiting significant minimum inhibitory concentration and antimicrobial activity indicates the efficacy of this plant to be considered for discovering and extracting new antimicrobial products against the pathogens. These findings need further support for appropriate formulation of the drug and its therapeutic use in clinical settings.
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Bhalla, Nikhil, Vijay Kumar, and Susmita Shukla. "Study of Daucus carota ssp. Sativus and Butea monosperma to analyse their Applicability in Pharmaceutical Industry as Antimicrobial Agents." International Journal of Phytomedicine 10, no. 1 (April 30, 2018): 11. http://dx.doi.org/10.5138/09750185.2178.

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<p>Human Beings have been using plant products to heal the Wounds and Diseases from the inception of humankind. Even when it was not known that microorganisms exist, People have been using antimicrobial agents prepared from plants. These antimicrobial products were prepared by extracting the plant in a suitable solvent. Antimicrobial property is conferred to plants by the presence of various phytochemicals which are the products of several Secondary metabolic pathways. The aim of this project was to decipher the potential use of <em>Daucus carota ssp. Sativus </em>and <em>Butea monosperma</em> in the pharmaceutical industry. In this research, Qualitative phytochemical screening and antimicrobial potential of Black carrot and Kamarkas has been studied.</p><p>Black carrot showed good antimicrobial activity against <em>A. brasiliensis, E. coli </em>and<em> S. enterica</em>, arranged in descending order of the Slope obtained in each antimicrobial assay. Phytochemical screening showed the presence of Flavonoids, Soluble Phenolic Compounds, Naphthoquinone and traces of Saponins and Alkaloids. The Kamarkas showed antimicrobial activity against <em>S. aureus</em> and to some extent against <em>A. brasiliensis</em>. Phytochemical analysis of Kamarkas showed positive for all phytochemicals. </p>
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B. Deepa and T. Sivakumar. "Screening of Phytochemicals and in vitro studies of Garlic: An Updated review." international journal of engineering technology and management sciences 7, no. 1 (February 28, 2023): 6–11. http://dx.doi.org/10.46647/ijetms.2023.v07i01.002.

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Herbal remedies are an integral part of ancient folk medicinal systems. The aim of the present study was to investigate the phytochemical constituents, adjacent composition and antimicrobial of (Garlic) Allium sativum L. extract. The qualitative phytochemical screening of Allium sativum aqueous and ethanol extracts indicated the presence of Alkaloid, terpenoids, flavonoids, steroid, phenol, Anthraquinones, saponin, tannin and glycoside. Quantitatively phytochemical was analysed alkaloid, tannin and saponin and adjacent composition of nutrients carbohydrates, protein, fats, fibre, moisture and ash. Garlic extract has antioxidant, antimicrobial activity and antidiabetic activity. Garlic contains high levels of sulfur compounds that are responsible for its medicinal effects. The available reports on phytochemicals, antioxidant, and antimicrobial, antidiabetic activity of Garlic are discussed in this review.
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Jebamalai, Suresh Kumar, Nirmala Ramachandran, and Venkatraman Arumugam. "Phytochemical and antimicrobial studies on Hygrophila auriculata Schumach." International Journal of Current Research in Biosciences and Plant Biology 8, no. 12 (December 6, 2021): 23–31. http://dx.doi.org/10.20546/ijcrbp.2021.812.004.

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In the present study, the medicinal plant Hygrophila auriculata was selected and the screening of the qualitative and quantitative of phytochemicals. The phytochemical profiles were estimated through the Gas chromatography-Mass spectrophotometer, which containing twenty compounds were listed out. The antimicrobial activity of the methanolic extract of the entire plant was studied against five selected bacterial and five selected fungal pathogens using well diffusion method. The results revealed that the methanolic extract of Hygrophila auriculata possessed alkaloids, flavonoids, terpenoids and various other phytochemicals. The extract showed antimicrobial activity against Aspergillus niger, Escherichia coli, and Klebsiella pneumoniae with a range of 8-16 mm zone of diameter, This study gives a new route to discovery of new drug for the control of microorganisms.
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Muddapur, Uday M., Aejaz A. Khan, Amal Bahafi, S. M. Shakeel Iqubal, Abdul Rahman Ikbal, Tasneem Mohammed, Kayamkani Abedulla Khan, and Muazzam Sheriff Maqbul. "Extraction of the Metabolites from Medicinal plant Euphorbia leaf." Oriental Journal Of Chemistry 37, no. 5 (October 30, 2021): 1257–61. http://dx.doi.org/10.13005/ojc/370535.

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The antimicrobial, phytochemical contents of extracts obtained from the leaf extract of mature Euphorbia pilulifera (E. pilulifera) were examined in this research work. Using ethyl acetate extracts of the leaves of Euphorbia pilulifera, phytochemical metabolites were studied. Further using chromatography, different components were separated and its antimicrobial activity was studied. Different types of bacterial organisms were used for evaluating the antimicrobial activity. The results indicated that leaf extracts are more sensitive towards organisms. Thus the presence of phytochemicals in the leaf extract can be used for the treatment of different diseases.
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Das, Sumit, Nuruzzaman Dewan, Kapil Joyti Das, and Dhritishmita Kalita. "PRELIMINARY PHYTOCHEMICAL, ANTIOXIDANT AND ANTIMICROBIAL STUDIES OF FLACOURTIA JANGOMAS FRUITS." International Journal of Current Pharmaceutical Research 9, no. 4 (July 14, 2017): 86. http://dx.doi.org/10.22159/ijcpr.2017v9i4.20965.

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Objective: To determine phytochemical, antimicrobial and in vitro antioxidant activity of Flacourtia jangomas (Family: Flacourtiaceae)Methods: The fruit extracts of the plant was taken for the phytochemical screening to identify the phytochemicals present in it. The extracts of the fruits were evaluated for antimicrobial activity against S. aureus and Escherichia coli by disc diffusion method. In vitro, antioxidant activity was performed by reducing power method, TBA method.Results: The n-butanol extracts showed significant antimicrobial activity against all the strains as compared to the standard drug. The extracts also showed antioxidant activity against the standard ascorbic acid.Conclusion: The extracts showed a high amount of antimicrobial activity and antioxidant activity.
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Zalegh, Imane, Mohamed Akssira, Mohammed Bourhia, Fouad Mellouki, Naima Rhallabi, Ahmad Mohammad Salamatullah, Mohammed Saeed Alkaltham, Heba Khalil Alyahya, and Rajaa Ait Mhand. "A Review on Cistus sp.: Phytochemical and Antimicrobial Activities." Plants 10, no. 6 (June 15, 2021): 1214. http://dx.doi.org/10.3390/plants10061214.

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Resistance to drugs is reaching alarming levels and is placing human health at risk. With the lack of new antimicrobials drugs, infectious diseases are becoming harder to treat. Hence, there is an increasing awareness of active phytochemicals with therapeutic functions. The tremendous research interest on the Cistus L. genus includes numerous plants used in traditional medicine by people living around the Mediterranean Sea, also resulted in some interesting discoveries and written literature. This review aimed at gathering scientific literature about Cistus species, describing phytochemical profiles and the various pharmacological activities. We also extensively reviewed the antimicrobial activities, including antiviral, antiparasitic, antifungal, and antibacterial potentials of Essential Oils (EO), raw extracts as well as isolated compounds. Mechanisms of action along with methods used are also investigated in this review. Considering the findings of the Cistus species extracts, this genus offers an adequate reserve of active phytochemicals since many have been used to create drugs. Therefore, this review work can serve society by providing a global view on Cistus L. sp. regarding pharmacological potentials and their chemical profiles.
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Ribeiro, Marta, Joana Malheiro, Liliana Grenho, Maria Helena Fernandes, and Manuel Simões. "Cytotoxicity and antimicrobial action of selected phytochemicals against planktonic and sessile Streptococcus mutans." PeerJ 6 (June 4, 2018): e4872. http://dx.doi.org/10.7717/peerj.4872.

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Background Dental caries remains the most prevalent and costly oral infectious disease worldwide, encouraging the search for new and more effective antimicrobials. Therefore, the aim of this work was to study the antimicrobial action of selected phytochemicals (eugenol, citronellol, sabinene hydrate, trans-cinnamaldehyde, terpineol and cinnamic acid) against Streptococcus mutans in planktonic and biofilm states as well as the cytotoxicity of these compounds. Methods The antibacterial activity of the selected compounds was evaluated by the determination of the minimal bactericidal concentration. The resazurin assay was used to assess the metabolic activity of sessile S. mutans. The cytotoxicity was determined using a fibroblast cell line. Results Among the tested phytochemicals, citronellol, cinnamic acid and trans-cinnamaldehyde were the most effective against both planktonic and sessile S. mutans, an effect apparently related to their hydrophobic character. Additionally, these three compounds did not compromise fibroblasts cell viability. Discussion Citronellol, cinnamic acid and trans-cinnamaldehyde demonstrated significant antimicrobial activity and low cytotoxicity proposing their potential as a novel group of therapeutic compounds to control oral infectious diseases. Moreover, their effects are particularly relevant when benchmarked against eugenol, a phytochemical commonly used for prosthodontic applications in dentistry.
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Momanyi Kerubo Rachael, Rajiv P, and Sugapriya Dhanasekaran. "Screening for Phytochemicals and Antimicrobial Activity of Aqueous extract of Tridax procumbens." International Journal of Research in Pharmaceutical Sciences 11, no. 4 (September 29, 2020): 5787–90. http://dx.doi.org/10.26452/ijrps.v11i4.3226.

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The plants are producing different types of secondary metabolites and are employed either indirectly or directly in the pharmaceutical industries. The chemical constituents of secondary metabolites improve the primary health and physiological activity in human systems. Tridax procumbens is belonging to Asteraceae family. T. procumbens is classified as a weed. In traditional medicine, the leaves, root, and stem of T. procumbens were used to treatment of stomach pain, diarrhoea, colds, inflammations, hepatopathies, bacterial and skin infections. The main objectives of present study were to screen the phytochemicals and antimicrobial activity of aqueous extract of weed plant (T. procumbens). The phytochemical screening was carried out using the stranded methods. The evaluation of antimicrobial activity for aqueous extract of T. procumbens was done by agar well diffusion method using bacterial and fungal pathogens such as Bacillus subtilis, Escherichia coli, Fusarium oxysporium and Trichoderma reesei. All the phytochemicals such as carbohydrates, phenolic groups, glycosides, tannin, alkaloids, saponin, flavonoids and steroids were present in the extract of T. procumbens and were confirmed by phytochemical analysis. The aqueous extract has not shown antibacterial and antifungal activity against tested pathogens. Other evaluation process is to be done on isolation of phytochemicals and chemical structure determination of bioactive compounds.
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Kalita, Lawrence, Biswajit Dash, Uttam Borah, Juman Deka, and Suvakanta Dash. "PRELIMINARY PHYTOCHEMICAL ANALYSIS AND ANTIMICROBIAL ACTIVITY ETHANOLIC EXTRACTS OF DRIED FRUITS OF SOLANUM TORVUM (FAMILY-SOLANACEAE)." International Journal of Current Pharmaceutical Research 9, no. 3 (May 5, 2017): 123. http://dx.doi.org/10.22159/ijcpr.2017.v9i3.19982.

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Objective: To study the antimicrobial activity ethanolic extracts of dried fruits of Solanumtorvum (family-solanaceae) along with preliminary phytochemical analysis.Methods: The ethanolic extract of dried fruits of the herb Solanumtorvum (family-solanaceae) were prepared and analyzed for phytochemical constituents using standard methods. The antimicrobial activity of the plant extracts were examined against 2 bacterial strains among one is gram positive and other is gram negative and 2 fungus using agar well diffusion method.Results: The present experiment shows the phytochemical analysis, antimicrobial activity of the ethanolic extract of dried fruits of the plant Solanumtorvum (family-solanaceae). Various phytochemical analysis revealed the presence of alkaloids, saponin, flavonoids, carbohydrates, glycosides, Steroids, proteins and amino acids and tannins. All the extracts of the plant showed antimicrobial activity against most of the test organisms.Conclusion: It can be concluded ethanolic extract of whole aerial parts of the Solanumtorvum (family-solanaceae) contain the high presence of phytochemicals. This extract was found to possess promising antimicrobial activity when compared with the standards.
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Dissertations / Theses on the topic "Antimicrobial phytochemicals"

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Ilanko, Pavithra. "Antibacterial properties of Moringa oleifera alone and in combination with conventional antibiotics." Thesis, Griffith University, 2017. http://hdl.handle.net/10072/381166.

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An increase in antibiotic resistance and a corresponding decrease in antimicrobial discovery has directed researchers towards alternative antimicrobial therapies. For centuries, humans have relied on plants for sources of effective antimicrobial agents. However, studies suggest that plants also possess the ability to potentiate the activity of other antimicrobials. Therefore, this study aims to determine the antimicrobial efficacy of Moringa oleifera extracts alone and in combination with various conventional antibiotics, against the bacterial triggers of autoimmune diseases. The study will also analyse the qualitative phytochemical and toxicity profile of the M. oleifera extracts, in order to understand the chemical and biological characteristics of a plant widely used in various traditional medicine practices throughout the world. The leaves, seed and pulp of M. oleifera was extracted using solvents of varying polarity. The antimicrobial efficacy (minimum inhibitory concentration) of these extracts were determined using a modified version of Kirby-Bauer disc diffusion and a micro-plate liquid dilution assay. The different types of interactions between M. oleifera extracts and conventional antibiotics were identified through a liquid dilution assay (fractional inhibitory concentration). Any synergistic combinations were further analysed to obtain an optimum concentration and a synergistic ratio. Furthermore, an Artemia franciscana nauplii lethality assay was used to determine the LC50 value of the M. oleifera extracts in order to determine its safety as a future chemotherapeutic drug. The qualitative phytochemical screenings show that generally, mid to higher polar extracts (water, methanol and ethyl acetate) were abundant in various antimicrobial phytochemicals including phenols, alkaloids, tannins, saponins and triterpenoids, with a few exceptions. These phytochemicals may have contributed to the greater levels of inhibition seen in mid-high polar extracts in comparison to lower polar extracts in the screenings. M. oleifera seed ethyl acetate extract performed exceptionally well in the screenings, with greater levels of activity than the ampicillin control, against Proteus vulgaris (12.6 ± 0.4mm), Acinetobacter baylyi (10.8 ± 0.8mm) and Pseudomonas aeruginosa (8 ± 0.8mm). Remarkably, twelve out of the fifteen extracts tested showed inhibitory activity against a strain of P. aeruginosa which has been previously shown to be resistant to a wide range of bacteria. A quantification of the antimicrobial efficacy as determined by minimum inhibitory concentration (MIC) of the plant revealed that most of the M. oleifera extracts inhibited the growth of at least four out of the six bacterial species tested. Generally, higher polarity extracts (methanol and water) inhibited more types of bacteria in comparison to the mid to lower polar extracts (chloroform, ethyl acetate and hexane). However, the most potent bacterial growth inhibitors were of lower polarity including M. oleifera seed chloroform (MIC - 357 μg/mL) and M. oleifera ethyl acetate (MIC - 500 μg/mL) against P. vulgaris. A total of 450 different combinations of M. oleifera extracts and five conventional antibiotics were tested against six species of bacteria. Most of the combinations were either additive or non-interactive, which suggests the combination are safe to use together. However, a few combinations produced antagonistic results. Generally, a combination of gentamicin with higher polar M. oleifera extracts (water and methanol) produced antagonistic effects against Proteus mirabilis, A. baylyi and Klebsiella pneumoniae. Therefore, it is recommended to avoid combinations of higher polarity M. oleifera extracts and gentamicin for therapeutic usage. A total of 27 different combinations (6%) were synergistic against the growth of four main bacterial triggers of autoimmune diseases. Eighteen different combinations of M. oleifera extracts (mainly lower polarity) with chloramphenicol, gentamicin and erythromycin were synergistic against the growth of P. vulgaris, a known trigger of rheumatoid arthritis. Similarly, lower polarity extracts were synergistic against the growth of P. aeruginosa and A. baylyi (triggers of multiple sclerosis). Lastly, M. oleifera leaf hexane was synergistic in combination with chloramphenicol against K. pneumoniae, a trigger of ankylosing spondylitis. Notably, several of the antibiotics that acted synergistically including penicillin, tetracycline and erythromycin were initially completely ineffective against the microbes tested. Essentially, this project has identified combinations of M. oleifera extracts that can potentiate the activity of several antibiotics that are prone to various mechanisms of resistance. However, several metabolomics (HPLC-MS, GCMS, NMR), enzyme and efflux pump inhibitory assays need to be conducted in future studies, in order to identify any potential resistance modifying agents. This study also shows that M. oleifera extracts are non-toxic and can significantly improve the efficacy of current antimicrobial drugs. Therefore, they are ideal candidates as inhibitors of the bacterial triggers of rheumatoid arthritis, multiple sclerosis and ankylosing spondylitis.
Thesis (Masters)
Master of Science (MSc)
School of Environment and Sc
Science, Environment, Engineering and Technology
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Knox, Natalie. "An exploration of ecological concepts in the context of antimicrobial resistance and the use of phytochemical compounds within the ruminant gut microbiome." Agricultural Institute of Canada, publisher of Canadian Journal of Plant Science, 2008. http://hdl.handle.net/1993/14405.

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Secondary plant metabolites have recently been gaining interest in livestock production systems following the ban of in-feed antibiotics within the European Union. The rise in antimicrobial resistance found in pathogenic and non-pathogenic bacteria has lead to increased interest in the research community regarding the use of phythochemicals as an alternative to antibiotics. The purpose of this research was to evaluate the impact of including phytochemicals in a livestock production system. Specifically, a high tannin-containing forage, sainfoin (Onobrychis viciifolia), was evaluated in vitro for its antimicrobial effect on Escherichia coli. We determined that phytochemicals alone are not as inhibitory as synthetic antibiotics. Thus, the use of combination therapy to deter the development of antimicrobial resistance was evaluated. A myriad of plant compounds were screened for their synergistic interactions with ciprofloxacin. Geraniol, an essential oil, was identified to possess good antimicrobial activity and synergistic interactions with ciprofloxacin. Therefore the effect of long term exposure to both ciprofloxacin and geraniol were examined. Results demonstrated that once an antimicrobial concentration threshold was reached, resistance to ciprofloxacin increased markedly in the presence of both geraniol and ciprofloxacin. Finally, an in vivo trial was conducted in which forty steers were fed sainfoin or alfalfa over a 9-week period to evaluate its ability to reduce E. coli shedding and its impact on gut microbiota in the context of popular theoretical ecology concepts. Results from the in vivo study indicate that sainfoin was able to promote a slight decrease in generic E. coli shedding which could be maintained throughout the trial. Using high-throughput sequencing, the effect of sainfoin on the microbial ecosystem of the ruminant gut was evaluated. Sainfoin induced a significant shift in the microbial community structure of the rumen and to a lesser extent in the hindgut. Using ecology theories, a hypothesis was formulated regarding the mechanisms that mediate the development of tolerance and the fundamental ecological processes controlling microbial population shifts. Understanding how the gut ecosystem functions and predicting its behaviour in the presence of various fluctuating environmental conditions will enable more efficient manipulation of the rumen and promote best management practices in livestock production.
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Al-Marby, Adel [Verfasser], and Claus [Akademischer Betreuer] Jacob. "Nematicidal and antimicrobial evaluation of extracts, nanosized materials and fractions of selected plants and the identification of the bioactive phytochemicals / Adel Al-Marby ; Betreuer: Claus Jacob." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2017. http://d-nb.info/1142919730/34.

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Mwangi, Henry Maina. "Phytochemical and antimicrobial studies on Rhus natalensis." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3552_1365671232.

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Extracts from the root bark, stem bark, and leaves of R. natalensis were screened for antibacterial activity against standard bacterial strains
Staphylococcus aureas, Escherichia coli and Pseudomonas aureginosa, and fungi
Candida albicans, Trichophyton mentagrophytes or Microsporum gyseum. Chromatographic techniques were utilized to isolate pure compounds. This study validates and documents, in a systematic way, the antimicrobial properties of the R. natalensis used for many years by many people of the world. It also provides valuable information for 
further phytochemical isolation and characterization studies of active compounds, necessary for the development of new drugs. The extractions were carried out using broad spectrum of solvents 
(hexane, dichloromethane, ethyl acetate, and methanol). Fractionation was done using standard chromatographic techniques. A total of seven (7) compounds were isolated from R. natalensis. 
Three of the isolates were characterized and their structures were unambiguously established by detailed spectroscopic analysis that involved high resolution mass spectrometry, 1D and 
2D-NMR spectral data experiments 1H, 13C, DEPT, COSY, HMBC, and NOESY. These compounds are: 3-(1-(2,4-dihydroxyphenyl)-3,3-bis(4- hydroxyphenyl)-1-oxopropan-2-yl)-7-methoxy- 4H-chromone-4-one (39), Rhuschromone, a 
novel compound isolated for the first time, 2&rsquo
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-dihydroxychalcone-(4-O-5&rsquo
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- trihydroxychalcone (40) and 3-((Z)-heptadec-13-enyl) benzene- 1,2-diol (41), an urushiol. Compound 39 recorded the highest activity zone of inhibition (21mm) against S. aureas, which was found to be 50% as active the chloramphenicol standard used. The 
traditional use of the extracts in infections and inflammatory conditions is rationalized based on the content of theisolated compounds, and it has been proposed that the total crude extract, with its 
contents of so many bioactive compounds, could be formulated for use in many infections, microbial or fungal. Furthermore, not all of the species studied to date have been fully characterized 
for potential bioactivities. Thus, there remains a significant research gap spanning the range from lead chemical discovery through process development and optimization in order to better 
understand the full bioactive potential of many of these plants.

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Omar, Semir. "Phytochemical discovery of antifeedant, antimicrobial and antimalarial principles." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ66179.pdf.

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Stavri, Michael. "Phytochemical and antimicrobial studies on selected Kuwati flora." Thesis, University College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411791.

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Gordien, Andrâea Y. "Phytochemical and antimicrobial studies of Scottish plants and fungal endophytes." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=14347.

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Chawananorasest, Khanittha. "Phytochemical and antimicrobial studies of some medicinal plants from south east Asia." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=17196.

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This thesis presents the isolation and structure elucidation of a range of secondary metabolites from four selected medicinal plants from Southeast Asia; Thailand and Bangladesh, namely, Cassia tora, Piper betel, Brugueira gymnorrhiza and Avicennia alba. A Variety of natural products belonging to several classes were isolated and investigated for their biological activity. The evaluation of Piper betel extracts for antimicrobial activity and some second metabolites isolated from Piper betel for Antimethicillin-Resistant Staphylococcus aureus activity (MRSA) were targeted in this thesis. A total of eightteen compounds were isolated from the selected plants, including mixtures of two steroids and two sesquiterpenes and two of the compounds were active against MRSA. Phytochemical investigation of Cassia tora leaves resulted in two anthraquinones (physcion and chrysophanol) and a mixture of steroids (β-sitosterol and stigmasterol). Physcion and chrysophanol are reported from the leaves of Cassia tora for the first time. Phytochemical investigation of Piper betel leaves led to the isolation of two phenolic compounds (eugenol and 4-allyl pyrocatechol), a mixture of sesquiterpenes (β- elemene and trans-calamenene), γ-muurolene and an unidentified cycloartane derivative. Eugenol and 4-allyl pyrocatechol were active against MRSA, β-elemene, trans-calamenene, γ-muurolene and the unidentified cycloartane derivative are being reported for the first time from the leaves of Piper betel. Phytochemical investigation of Bruguiera gymnorrhiza leaves led to six triterpenoids (careaborin and taraxerol, β-Z-p-coumaroyl taraxerol, taraxerone, β-lauryl-β-amyrin and, 3,4-seco-taraxerol) and one quinone (stenocarpoquinone B). These compounds are being isolated for the first time from the leaves of Bruguiera gymnorrhiza and the Rhizophoraceae family. Phytochemical investigation of Avicennia alba stems led to a triterpenoid (betulinic acid) and a steroid (β-sitosterol). Antibacterial activity of isolated compounds was investigated against Antimethicillin-Resistant Staphylococcus aureus activity (MRSA). Eugenol and 4- allyl pyrocatechol were active and gave MIC valves, 64 and 128 μg/mL.
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Shilpi, Jamil A. "Phytochemical and antimicrobial studies on Ludwigia ascendens, trewia nudiflora and hygrophila auriculata." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510832.

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Rahman, Md Mukhlesur. "Phytochemical and antimicrobial studies on some species of Bangladeshi Leguminosae and Rutacaea." Thesis, University of Strathclyde, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269878.

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Books on the topic "Antimicrobial phytochemicals"

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Vazhacharickal, Prem Jose, Saritha S. Janardhanan, and John Joseph. Phytochemical, Antioxidant and Antimicrobial Activity of Aerva Lanta Against Respiratory and Urinary Tract Infection Organisms. Independently Published, 2018.

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Singh, Bhavna, Dhruv Pandya, and Dr Archana Mankad, eds. Comparative Study of Phytochemical Screening and Antimicrobial Activity of Melia azedarach L. and Azadirachta indica a. Juss. AkiNik Publications, 2020. http://dx.doi.org/10.22271/ed.book.983.

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Book chapters on the topic "Antimicrobial phytochemicals"

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Pistelli, Luisa, and Irene Giorgi. "Antimicrobial Properties of Flavonoids." In Dietary Phytochemicals and Microbes, 33–91. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-3926-0_2.

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Sagdic, Osman, and Fatih Tornuk. "Antimicrobial Properties of Organosulfur Compounds." In Dietary Phytochemicals and Microbes, 127–56. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-3926-0_4.

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Kalemba, Danuta, Martyna Matla, and Anna Smętek. "Antimicrobial Activities of Essential Oils." In Dietary Phytochemicals and Microbes, 157–83. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-3926-0_5.

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Patra, Amlan Kumar. "An Overview of Antimicrobial Properties of Different Classes of Phytochemicals." In Dietary Phytochemicals and Microbes, 1–32. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-3926-0_1.

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Zaheen, Zarka, Ali Mohd Yatoo, Shafat Ali, Md Niamat Ali, Sabhiya Majid, Shabhat Rasool, Shahzada Mudasir Rashid, Sheikh Bilal Ahmad, Manzoor ur Rahman Mir, and Uzma Zehra. "Honey: Types, Composition and Antimicrobial Mechanisms." In Therapeutic Applications of Honey and its Phytochemicals, 193–214. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6799-5_10.

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Sameer, Aga Syed, Saniya Nissar, Mujeeb Zafar Banday, and Iyman Rasool. "Honey and Its Derivatives: A New Perspective on Its Antimicrobial Activities." In Therapeutic Applications of Honey and its Phytochemicals, 121–49. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6799-5_7.

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Londonkar, Ramesh, and Maithilee Kesralikar. "In Vitro Anticancer Screening of Methanolic Extract of Stachytarpheta Mutabilis." In Proceedings of the Conference BioSangam 2022: Emerging Trends in Biotechnology (BIOSANGAM 2022), 188–204. Dordrecht: Atlantis Press International BV, 2022. http://dx.doi.org/10.2991/978-94-6463-020-6_19.

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AbstractIn therapeutic plants, phytochemicals are found in abundance. A family of verbena known as vervain (verbenaceae) consists of over 100 genera and nearly 2600 species. Among the Verbenaceae family is Stachytarpheta, a green perennial herb. The species is being examined in this study for its phytochemical, antioxidant, and anti-inflammatory properties. Stachytarpheta mutabilis methanol extracts were studied for their phytochemical screening, antimicrobial, anti-inflammatory, and anticancerous effects in the current study. Phytochemical study revealed the presence of alkaloids, flavonoids, glycosides, steroids, tannins, carbohydrates, and saponins, among other phytoconstituents. One fungus, Aspergillus niger, Staphylococcus aureus, and Bacillus subtilis, as well as four-gram (+) pathogens, including Staphylococcus aureus and Bacillus subtilis, and two gram (-) pathogens, including Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, and Klebsiella pneumoniae, were disc diffusion tested for antibacterial activity. The nitric oxide scavenging assay was used to test for anti-inflammatory efficacy in vitro. DPPH, ABTS, and total antioxidant tests were used to evaluate antioxidant activity. Analyses such as TLC, GC-MS, and were performed as per common procedure. A nitric oxide scavenging experiment was utilised to determine the anti-inflammatory properties of the drug in vitro. Tests for antioxidant activity were conducted using DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS (2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)), and total antioxidant tests. MTT (3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide) analysis has been used to do anticancer screening. Extracts from Stachytarpheta mutabilis were found to include flavonoids, tannins and phenolic compounds as well as terpenoids and steroids in their phytochemical analysis. Squalene, octadecanal, and butan-1-one were found in the GC-MS study as were thirty other bioactive chemicals such as 4-isopropylcinnamic acid and octadecanoic acid. The methanolic fractions of plant extracts were shown to be effective against all bacteria. Anti-inflammatory and antioxidant experiments performed in the lab revealed the compounds’ potent inhibition activity. Analysis of the GC-MS data revealed the existence of thirty distinct components. MTT assay on the extract revealed anticancer activity. The data shows that the methanolic extract has a significant properties. Stachytarpheta mutabilis has therapeutic value and other pharmaceutical qualities may be assessed as a result of these results, which support the traditional usage of folk medicine as well.
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Sinha, Sankar Narayan, and Karabi Biswas. "Phytochemical Screening and Evaluation of Antimicrobial Potential of Dendrobium fimbriatum Hook." In Orchid Biology: Recent Trends & Challenges, 531–38. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-32-9456-1_28.

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Owk, Aniel Kumar, and Mutyala Naidu Lagudu. "Aegle marmelos (Rutaceae): Evaluation of Root Phytochemical Constituents for Antimicrobial Activity." In Medicinal Plants: Biodiversity, Sustainable Utilization and Conservation, 573–82. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1636-8_34.

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Sadashiva, C. T., Satheesh George, Nitha Balan, U. Prakash Kumar, and Indira Balachandran. "Preliminary Phytochemical and Antimicrobial Activity of Ethanolic Extract of Pittosporum viridulum Stem Bark." In Prospects in Bioscience: Addressing the Issues, 89–92. India: Springer India, 2012. http://dx.doi.org/10.1007/978-81-322-0810-5_10.

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Conference papers on the topic "Antimicrobial phytochemicals"

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Babich, O. O., V. V. Larina, and L. N. Skrypnik. "PHYTOCHEMICAL STUDY OF CALLUNA VULGARIS." In I International Congress “The Latest Achievements of Medicine, Healthcare, and Health-Saving Technologies”. Kemerovo State University, 2023. http://dx.doi.org/10.21603/-i-ic-9.

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This work investigated the antioxidant and antimicrobial activity, as well as the metabolomic composition of various extracts of C. vulgaris. The dependence of the properties and compositions of extracts on the extraction parameters is shown. The work allows to conclude about the prospect of using C. vulgaris as a source of active components with antioxidant and bactericidal properties.
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Sreekumar, Krishnendu, and Aji Abraham. "Phytochemical, antimicrobial and antioxidant evaluation of Gulgulupanchapala choornam." In INTERNATIONAL CONFERENCE ON SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS: STAM 20. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0017676.

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Marquardt, P., A. Schubert, V. Ahyi, and K. Fester. "Antimicrobial activity and phytochemical analysis of Combretum collinum leaves extract." In 67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP. © Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-3400133.

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Da Costa Batista, JV, A. Bugnon, P. de Moura, A. Carvalho, I. Leal, R. Garrett, J. Maier, et al. "Antimicrobial and phytochemical analyses of European Larch resins and essential oils." In GA – 70th Annual Meeting 2022. Georg Thieme Verlag KG, 2022. http://dx.doi.org/10.1055/s-0042-1759122.

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Balde, MA, E. Tuenter, MS Traore, P. Cos, AM Balde, L. Pieters, and K. Foubert. "Phytochemical and biological investigations on potentially antimicrobial and anticancer Guinean plant species." In 67th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research (GA) in cooperation with the French Society of Pharmacognosy AFERP. © Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-3399924.

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Lubis, Rosliana. "Phytochemical Screening and Antimicrobial Activity of Several Medicinal Plants from North Sumatera." In International Conference on Natural Resources and Sustainable Development. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0009903400002480.

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Sen, B., A. K. Gelen, F. N. Yilmaz, and S. Dosler. "Preliminary Phytochemical Analysis and Antimicrobial Activity Study of Thymus transcaucasicus from Turkey." In GA – 70th Annual Meeting 2022. Georg Thieme Verlag KG, 2022. http://dx.doi.org/10.1055/s-0042-1759266.

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"Phytochemical, Antimicrobial and Sensory Qualities of Herbal Tea Made from Sarcandra glabra and Drymis piperita." In CABES-2017, DMCCIA-2017, FEBM-17, BDCMTE-17, LLHIS-17 and BMLE-17. Dignified Researchers Publication (DiRPUB), 2018. http://dx.doi.org/10.15242/dirpub.c1217132.

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Eze, F., P. Osadebe, and P. Uzor. "Acute Toxicity, Phytochemical, and Antimicrobial Properties of Selected Nigeria Medicinal plants on Amoxicillin-resistant Microorganisms." In GA 2017 – Book of Abstracts. Georg Thieme Verlag KG, 2017. http://dx.doi.org/10.1055/s-0037-1608484.

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Jamil, Ahmad Shobrun, Siti Rofida, Dian Priyani, Wahidatin Nabila, and Evi Wulandari. "Phytochemical Screening and Antimicrobial Activity of Limonia acidissima Ethanol Extract Against Microbes from Clinical Isolates." In The Health Science International Conference. SCITEPRESS - Science and Technology Publications, 2019. http://dx.doi.org/10.5220/0009126001520156.

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You might also be interested in the extended bibliographies on the topic 'Antimicrobial phytochemicals' for particular source types:
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