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    Stored Grains Protection Activity of Ocimum Suave Extracts and Compounds on Larger Grain Borer 

    Opiyo, Sylvia A. (IOSR Journal of Biotechnology and Biochemistry (IOSR-JBB) Volume 8, Issue 4 (Jul. – Aug. 2022), PP 05-10, 2022)
    Post-harvest pests cause serious losses to agricultural products in Africa. The pests consist mostly of beetles or moths and infest the grains at the crop stage or during the storage. Larger grain borer, Prostephanus truncatus ...
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    Effect of Acid Treatment on the Chemical Properties of Clays from Selected Sites in Murang’a and Nyeri counties, Kenya 

    Lomertwala, Hassan M.; Njoroge, Peter W.; Opiyo, Sylvia A.; Ptoton, Brian M. (2020-11-30)
    Assessing improvement on the quality of clay has been conducted by treatment with different concentrations of hydrochloric and oxalic acid. This project intended to assess the effect of acid treatment on the elemental ...
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    A review of 13C NMR spectra of drimane sesquiterpenes 

    Opiyo, Sylvia A. (2019-09)
    Drimane sesquiterpenes are important group of phytochemicals with a wide range of medicinal properties including antibacterial, antifungal, anti-inflammatory, antioxidant, antiplasmodial, antileishmanial, molluscicidal, ...
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    Antimicrobial Constituents Of Conyza Floribunda 

    Opiyo, Sylvia A.; Manguro, Lawrence O.A. (WebmedCentral, 2010-09)
    The study describes the antibacterial and antifungal effects of both CH2Cl2 and MeOH crude extracts, collected fractions and pure isolates of Conzya floribunda. The antimicrobial activity tests were carried out using agar ...
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    Chemical Composition And Biological Activity Of Extracts From Conyza Species 

    Opiyo, Sylvia A.; Njoroge, Peter W.; Kuria, Kennedy M. (iosrjournals.org, 2023-04)
    The genus Conyza (Asteraceae) comprises about 50 species and found in the tropical and warm regions. Extracts from Conyza species have numerous pharmacological applications. The aim of this study was review the chemical ...
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    Antimicrobial Compounds from Terminalia brownii against Sweet Potato Pathogens 

    Opiyo, Sylvia A.; Manguro, Lawrence O.A.; Owuor, Philip O.; Ochieng, Charles O.; Ateka, E.M.; Lemmen, Peter (Bentham Science Publishers, 2011)
    Phytochemical evaluation of Terminalia brownii extracts led to the isolation of five compounds namely - sitosterol, stigmasterol, monogynol A, betulinic acid and arjungenin. Their structures were established by spectroscopic ...
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    7a-Acetylugandensolide and antimicrobial properties of Warburgia ugandensis extracts and isolates against sweet potato pathogens 

    Opiyo, Sylvia A.; Manguro, Lawrence O.A.; Okinda-Owuor, Philip; Ateka, E.M.; Lemmen, Peter (Elsevier, 2011)
    7a-Acetylugandensolide together with thirteen known drimane-type sesquiterpenes have been isolated from Warbugia ugandensis bark extracts. Their structures were established by spectroscopic and physical methods as well as ...
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    Antimicrobial Activity of Root Bark Extracts of Rhus natalensisa and Rhus ruspolii 

    Njoroge, Peter W.; Opiyo, Sylvia A. (Scientific & Academic Publishing, 2019-08)
    Bacteria and fungi are frequent causes of serious opportunistic infections worldwide. Several effective antibiotic drugs are in the market. However, drug-resistance, side effects and cost of such antibiotics limits their ...
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    Chemical Constituents of Essential Oils from Three Eucalyptus Species Acclimatized in Ethiopia and Kenya 

    Manguro, L. A. O.; Opiyo, Sylvia A.; Asefa, A.; Dagne, E.; Muchori, P. W. (2014-11)
    Essential oils obtained by steam distillation of three Eucalyptus species acclimatized in Ethiopia and Kenya were analyzed using GC and GC-MS. The species were Eucalyptus citriodora, Eucalyptus globulus and Eucalyptus ...
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    Triterpenes and Sterols from Ocimum suave 

    Opiyo, Sylvia A. (2022-07)
    Ocimum species which belong to the family Lamiaceae have several medicinal uses including antimalarial, antimicrobial, antidiabetic, hepato-protective, anti-inflammatory, anti-carcinogenic, cardio-protective and insect ...
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    Opiyo, Sylvia A. (51)
    Njoroge, Peter W. (14)Manguro, Lawrence O.A. (9)Ateka, E.M. (5)Ndirangu, Ephantus G. (5)Ochieng, Charles O. (4)Kuria, Kennedy M. (3)Owuor, Philip O. (3)Ishola, Ismail O. (2)Lemmen, Peter (2)... View MoreSubjectRepellence (5)Antibacterial (4)Antifungal (4)Conyza floribunda (3)Growth inhibition (3)Mortality (3)triterpenes (3)asteraceae (2)Celastraceae (2)Contact toxicity (2)... View MoreDate Issued2020 - 2025 (27)2010 - 2019 (22)2009 - 2009 (2)Has File(s)
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