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Relevant bibliographies by topics / Steroids Microorganisms

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Academic literature on the topic 'Steroids Microorganisms'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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Journal articles on the topic "Steroids Microorganisms"

1

Maser, Edmund, and Tea Lanišnik Rižner. "Steroids and microorganisms." Journal of Steroid Biochemistry and Molecular Biology 129, no. 1-2 (March 2012): 1–3. http://dx.doi.org/10.1016/j.jsbmb.2012.01.002.

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2

Donova, Marina. "Microbiotechnologies for steroid production." Microbiology Australia 39, no. 3 (2018): 126. http://dx.doi.org/10.1071/ma18039.

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Structural modification of steroids by microorganisms, known since the 1950s, is nowadays a base for industrial production of many steroid hormones and their high-value precursors. Phytosterols, renewable biomaterials of plant origin, are recognised now as most attractive, low-cost and available raw materials for the pharmaceutical industry.

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3

Voishvillo, N. E., A. M. Turuta, and A. V. Kamernitsky. "Microorganisms as reagents for transformations of 5?-steroids." Russian Chemical Bulletin 43, no. 4 (April 1994): 515–37. http://dx.doi.org/10.1007/bf00699817.

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4

Masendra, Masendra, Brandon Arsito Verick Purba, and Ganis Lukmandaru. "Antifungal Activity of Triterpenoids and Steroids Isolated from Pinus merkusii Bark Against Phanerochaete chrysosporium." Wood Research Journal 11, no. 2 (January 26, 2021): 65–71. http://dx.doi.org/10.51850/wrj.2020.11.2.65-71.

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The outer part of a tree, known as the bark, protects the internal tissues from external conditions and attacks from microorganisms. Its antifungal activities are due to the presence of chemicals in this bark. This study aimed at evaluating the toxicity of triterpenoids and steroids from the bark of Pinus merkusii against Phanerochaete chrysosporium (white-rot). The triterpenoids and steroids were isolated from n-hexane extract of the bark through column chromatography. Then, the antifungal activity was evaluated by measuring the growth rate of the fungus on potato dextrose agar (PDA) medium in a Petri dish. The isolation resulted in three triterpenoids (3β- methoxyserratt-14-en-21-one, serrate-14-en-3β,21β –diol, 3α,21β- dimethoxy-D14-serratene) and two steroids (β-sitosterol, Stigmast-4-en-3-one). There was more of antifungal activity with β-sitosterol and serrate-14-en-3β,21β –diol, due to presence of hydroxyl bond and their hydrophobicity.

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Ogidi, Odangowei Inetiminebi, Lilian Maureen Oluchi Oguoma, Patrick Chukwudi Adigwe, and Blessing Bumein Anthony. "Phytochemical Properties and In-vitro Antimicrobial Potency of Wild Edible Mushrooms (Pleurotus ostreatus) obtained from Yenagoa, Nigeria." Journal of Phytopharmacology 10, no. 3 (May 24, 2021): 180–84. http://dx.doi.org/10.31254/phyto.2021.10306.

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Microorganism resistance to synthetic antibiotics is an increasing public health challenge, therefore, new antimicrobial agents from different plant and biological sources are sought-after. This research was aimed at evaluating the phytochemical properties and antimicrobial potency of wild edible mushrooms. Qualitative and quantitative phytochemical analysis was done using the standard method of Association of Official Analytical Chemist and agar well diffusion method was used for antimicrobial analysis. Phytochemical results of wild edible mushroom Pleurotus ostreatus obtained from Yenagoa, shows varying quantities of tannins, terpenoids, alkaloids, flavonoids, saponins, glycosides and steroids. The methanol and aqueous extracts of the samples reveals different degree of inhibition on both bacteria and fungi (Shigella sp., Staphylococcus sp., Vibrio sp., Escherichia coli, Penicillium sp., Yeast and Moulds). Aqueous extracts were more effective on the test organisms when compared to methanol extracts. P. ostreatus showed good antimicrobial potency against all the microorganisms tested. The findings from this study show the efficacy of wild edible mushroom as a potent antimicrobial agent

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Krueger, Karen, and Lauren M. Guggina. "Mycobacterium mucogenicum skin and soft tissue infection of the breast mimicking idiopathic granulomatous mastitis." BMJ Case Reports 12, no. 12 (December 2019): e231900. http://dx.doi.org/10.1136/bcr-2019-231900.

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We present a case of a 28-year-old woman who came to medical attention after noticing a breast mass associated with an overlying eroded plaque of the skin. A core biopsy of the breast mass was negative for malignancy but demonstrated granulomatous inflammatory changes. Acid-fast bacilli and Gomori methenamine-silver stains were negative for microorganisms. The patient was diagnosed with presumptive idiopathic granulomatous mastitis and started on oral steroids. Her symptoms progressed. Tissue culture from a repeat biopsy grew Mycobacterium mucogenicum. The patient responded well to combination oral antimicrobial therapy.

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Rajani Chowdary Akkina, Payala Vijayalakshmi, and Raaththika R. "Evaluation of Anti-microbial activity of methanolic extract of Costus igneus plant against multidrug-resistant pathogenic microorganisms." International Journal of Research in Pharmaceutical Sciences 11, no. 3 (July 21, 2020): 3796–806. http://dx.doi.org/10.26452/ijrps.v11i3.2552.

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Costus igneus plants are highly active against the majority of Gram-negative and Gram-positive microorganisms. The purpose of the current study was intended to evaluate the anti-microbial potential of methanolic extract of Costus igneus over multidrug-resistant bacteria, specifically to methicillin, vancomycin, carbapenems, colistin. The study also focused on the antifungal activity of the plant extract against Candida species. Phytochemical analysis was conducted to identify the presence of the active chemicals such as steroids, alkaloid, flavonoids, polyphenols, terpenoids, saponin, tannin, glycosides, quinones, coumarins and phenolic compounds using standard protocols. Anti-microbial activity of C. igneus was assessed through agar well diffusion technique and Minimum inhibitory concentration method (MIC) by using multidrug-resistant Gram-positive microorganisms (Staphylococcus aureus, Enterococcus faecalis) and multidrug-resistant Gram-negative microorganisms (E.coli, Klebsiella pneumonia, Pseudomonas aeruginosa, Salmonella typhi, Proteus mirabilis, Citrobacter species) and also Candida albicans. At 120mg/ml C.igneus plant extract concentration, maximum zone of inhibition was obtained with all the nine tested microorganisms and however the zone of inhibition was slighter with regular standard potential antibiotics like colistin, imipenem etc. Anti-microbials of plant origin possesses tremendous therapeutic potential as they can accomplish the requirements with fewer sideeffects that are routinely associated with synthetic anti-microbials. In this investigation, it was established that C. igneus leaf extract possesses excellent anti-microbial activity which can be attributed to the occurrence of phytochemicals. Further discovery of plant-derived anti-microbials should be continued to trim down the usage of powerful drugs which pose bad side effects.

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Razmavar, Somayeh, Mahmood Ameen Abdulla, Salmah Binti Ismail, and Pouya Hassandarvish. "Antibacterial Activity of Leaf Extracts ofBaeckea frutescensagainst Methicillin-ResistantStaphylococcus aureus." BioMed Research International 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/521287.

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This study was based on screening antibacterial activity of the ethanol extract ofBaeckea frutescensL. against MRSA clinical isolates, analyzes the potential antibacterial compound, and assesses the cytotoxicity effect of the extract in tissue culture. Leaves ofBaeckea frutescensL. were shade dried, powdered, and extracted using solvent ethanol. Preliminary phytochemical screening of the crude extracts revealed the presence of alkaloids, flavonoids, steroids, terpenoids, phenols, and carbohydrates. The presence of these bioactive constituents is related to the antibacterial activity of the plant. Disc diffusion method revealed a high degree of activity against microorganisms. The results confirm thatBaeckea frutescensL. can be used as a source of drugs to fight infections caused by susceptible bacteria.

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de Araújo Navas, EAF, EI Sato, DFA Pereira, GN Back-Brito, JA Ishikawa, AOC Jorge, FL Brighenti, and CY Koga-Ito. "Oral microbial colonization in patients with systemic lupus erythematous: correlation with treatment and disease activity." Lupus 21, no. 9 (March 27, 2012): 969–77. http://dx.doi.org/10.1177/0961203312443420.

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Treating patients with systemic lupus erythematosus (SLE) with steroids and immunosuppressive drugs may interfere in the presence of potentially opportunistic microorganisms in the oral cavity. The aim of this study was to evaluate the presence of Candida spp., Staphylococcus spp., Enterobacteria and Pseudomonas spp. in the oral cavity of SLE patients, compared with healthy controls. A group of 40 patients who had received therapy for at least 60 days was selected (19–53 years). For the control group, 40 healthy individuals matched for age, gender and use of partial prosthesis were selected. Oral rinse samples were collected and plated on specific culture media. After incubation, the number of colony forming units (CFU) was obtained and the isolates were identified at species level. Microbial counts were compared between SLE and control by analysis of variance (ANOVA) and Mann–Whitney ( p < 0.05 significant). Microorganism counts in patients with and without immunosuppressive drugs, as well with active and inactive disease (according to SLEDAI score) were also compared. No significant differences in CFU/mL between SLE and control patients were observed (yeasts, p = 0.55; Staphylococci, p = 0.24; Enterobacteria/ Pseudomonas spp., p = 0.26). No differences in microbial counts were observed regarding clinical parameters tested. The most frequent species isolated in the SLE group were Candida albicans, Staphylococcus epidermidis and Klebsiella oxytoca. In conclusion, no differences in frequency and microorganism levels were found between SLE patients and healthy individuals.

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Eboma, Rachael Nkechi, Clement Olusola Ogidi, and Bamidele Juliet Akinyele. "Bioactive compounds and antimicrobial activity of extracts from fermented African locust bean (Parkia biglobosa ) against pathogenic microorganisms." North African Journal of Food and Nutrition Research 4, no. 08 (January 1, 2021): 343–50. http://dx.doi.org/10.51745/najfnr.4.08.343-350.

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Background: The challenges of multiple antibiotic resistance by pathogenic microorganisms has necessitated the need for a continuous search for new and effective antimicrobial bioactive compounds. Objectives: In this study, the antimicrobial activity of extracts from fermented condiment from Parkia biglobosa was investigated against some pathogenic microorganisms. Materials and Methods: Gas chromatography - mass spectrometry (GC-MS) was used to identify bioactive compounds in n-hexane extract (oil). Aqueous and n-hexane extracts of locust beans were tested against clinical isolates; viz., Klebsiella spp., Aeromonas hydrophilia, Citrobacter braakii, Enterobacter aerogenes, Shigella dysenteriae, Pseudomonas aeruginosa, Salmonella typhi, Escherichia coli, Methicillin-Resistant Staphylococcus aureus (MRSA), Aspergillus spp. and Candida albicans using agar well diffusion method. Results: The study revealed the phytochemicals in oil as phenols (41.8 mg/100g), flavonoids of 19.37 mg/100g, saponins (16.7 mg/100g), alkaloids (22.9 mg/100g), steroids (6.9 mg/100g), terpenoids (10.0 mg/100g) and cardiac glycosides (3.3 mg/100g). The aqueous extract contains phenols (33.7 mg/100g), flavonoids (12.3 mg/100g), alkaloids (17.6 mg/100g), saponins (5.0 mg/100g) and cardiac glycosides (1.2 mg/100g). The bioactive compounds in the n-hexane extract were ricinoleic acid, p-cymene, octadecanoic acid, n-hexadecanoic acid and others. Oil from fermented locust bean exhibited zones of inhibition ranging from 5 mm to 14 mm against the tested isolates at 10 mg/mL, while the aqueous extract displayed inhibition zones of 4 mm to 10 mm at 10.0 mg/mL. Conclusion: The chemical constituents in locally fermented condiment (locust bean) are responsible for pronounced antimicrobial properties. Hence, the condiment can be exploited for medicinal purposes. Keywords: Fermented food, condiment, n-hexane, phytochemicals and antimicrobials.

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Dissertations / Theses on the topic "Steroids Microorganisms"

1

Philpott, R. W. "Biochemical and fermentative studies with steroid transforming microorganisms." Thesis, Liverpool John Moores University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381596.

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Chrisp, P. "Novel azasterol antifungal agents from microorganisms." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380145.

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Chen, Ching-Shih. "The mechanism of degradation of side chains of phytosterols by microorganisms." 1985. http://catalog.hathitrust.org/api/volumes/oclc/12138242.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1985.
Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 135-138).

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Book chapters on the topic "Steroids Microorganisms"

1

Vischer, E., and A. Wettstein. "Enzymic Transformations of Steroids by Microorganisms." In Advances in Enzymology - and Related Areas of Molecular Biology, 237–82. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2006. http://dx.doi.org/10.1002/9780470122655.ch8.

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2

Guzik, Urszula, and Danuta Wojcieszyńska. "Biodegradation of Non-steroidal Anti-inflammatory Drugs and Their Influence on Soil Microorganisms." In Microorganisms for Sustainability, 379–401. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9117-0_16.

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3

Cano-Flores, Arturo, Javier Gómez, and Rigoberto Ramos. "Biotransformation of Steroids Using Different Microorganisms." In Chemistry and Biological Activity of Steroids. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.85849.

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4

Parish, Edward. "The Biosynthesis of Oxysterols in Plants and Microorganisms." In Physiology and Biochemistry of Sterols, 324–36. AOCS Publishing, 1992. http://dx.doi.org/10.1201/9781439821831.ch11.

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5

Schaller, Hubert. "Sterol and Steroid Biosynthesis and Metabolism in Plants and Microorganisms." In Comprehensive Natural Products II, 755–87. Elsevier, 2010. http://dx.doi.org/10.1016/b978-008045382-8.00008-3.

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