Relevant bibliographies by topics / Bacillus sphericus

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Academic literature on the topic 'Bacillus sphericus'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 July 2025

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Journal articles on the topic "Bacillus sphericus"

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Mmuoegbulam, Augusta Oluchi, Augustine Agorye Unimke, Iniobong Ebenge Andy, Ogemdi Chinwendu Anika, and Rachael Teniola Macaulay. "Effect of variations in heterotrophic plate count methods on bacterial estimation in some sachet water in Calabar Metropolis." World Journal of Advanced Research and Reviews 1, no. 2 (2019): 018–27. https://doi.org/10.5281/zenodo.4308311.

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Heterotrophic plate count (HPC) or standard plate count is a standardized method for determining the density of aerobic and facultative anaerobic heterotrophic microorganisms in water. In this study, water samples were analyzed to ascertain the effects of temperature, media, and incubation time in HPC methods of bacterial estimation. The samples were analyzed using the membrane filtration and direct plating methods. No faecal coliform was detected in all the samples and at all temperature. However, some coliforms and heterotrophic bacteria were present in the water samples. The organisms were
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Joshi, Bindu, and Satish Walia. "Characterization by arbitrary primer polymerase chain reaction of polychlorinated biphenyl (PCB)-degrading strains of Comamonas testosteroni isolated from PCB-contaminated soil." Canadian Journal of Microbiology 41, no. 7 (1995): 612–19. http://dx.doi.org/10.1139/m95-081.

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In this study, we isolated and characterized biphenyl (BP) and polychlorinated biphenyl (PCB) degrading bacterial strains found in PCB-contaminated soil from an auto manufacturing plant located in Syracuse, New York. Twenty-one BP and PCB-degrading bacteria were randomly selected to form a representative sample of the bacterial population present at the site. Of the 21 bacteria, 13 were identified as Comamonas testosteroni, constituting about 60% of the bacterial population examined. Other PCB degraders identified were Acidovorax facilis, Alcaligenes xylosoxydans, Bacillus sphericus, Hydrogeno
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GC, Ganga, Kshama Parajuli, Ishan Gautam, Megha Raj Banjara, Prakash Ghimire, and Komal Raj Rijal. "Efficacy of Native Bacillus thuringiensis against Mosquito Vector." Journal of Nepal Health Research Council 21, no. 3 (2024): 479–85. http://dx.doi.org/10.33314/jnhrc.v21i3.4742.

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Background: Larval source management is an effective measure to control mosquito-borne diseases. Bacillus thuringiensis produces specific insecticidal crystal proteins toxic to mosquito larvae. In many parts of the South East Asian region, Bacillus thuringiensis is used for larval source management. In Nepal, larvicidal Bacillus thuringiensis is not available. The study aims to isolate larvicidal Bacillus thuringiensis from soil samples of Nepal to control mosquitoes.Methods: Native Bacillus thuringiensis was obtained from soil samples by the acetate selection method. It was identified by obse
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Yang, Yankun, Liwei Wang, Adelaida Gaviria, Zhiming Yuan, and Colin Berry. "Proteolytic Stability of Insecticidal Toxins Expressed in Recombinant Bacilli." Applied and Environmental Microbiology 73, no. 1 (2006): 218–25. http://dx.doi.org/10.1128/aem.01100-06.

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ABSTRACT The production of the vegetative mosquitocidal toxin Mtx1 from Bacillus sphaericus was redirected to the sporulation phase by replacement of its weak, native promoter with the strong sporulation promoter of the bin genes. Recombinant bacilli developed toxicity during early sporulation, but this declined rapidly in later stages, indicating the proteolytic instability of the toxin. Inhibition studies indicated the action of a serine proteinase, and similar degradation was also seen with the purified B. sphaericus enzyme sphericase. Following the identification of the initial cleavage si
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Hong, Sung Wook, Soon-Wo Kwon, Soo-Jin Kim, et al. "Bacillus oryzaecorticis sp. nov., a moderately halophilic bacterium isolated from rice husks." International Journal of Systematic and Evolutionary Microbiology 64, Pt_8 (2014): 2786–91. http://dx.doi.org/10.1099/ijs.0.058768-0.

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A Gram-stain-positive, aerobic, endospore-forming, moderately halophilic rod, designated strain R1T, was isolated from rice husks and subjected to a taxonomic study using a polyphasic approach. Strain R1T produced spherical or ellipsoidal endospores at a subterminal position in swollen sporangia, and was catalase- and oxidase-positive. The isolate grew optimally at 37 °C and pH 6.0–7.0, and could grow in the presence of up to 9 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain R1T belongs to the genus Bacillus . The closest relatives of strain R1T were
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Reddy, A. J., D. V. S. R. Kumar, S. Rao, V. C. Prasannakumari, and V. Roja. "Endospore morphology and efficacy of indigenous Bacillus thuringiensis strains against okra fruit and shoot borer, Earias vittella." Journal of Environmental Biology 46, no. 2 (2025): 239–48. https://doi.org/10.22438/jeb/46/2/mrn-5294.

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Aim: The aim of this study was to determine the size of endospores of native Bacillus thuringiensis strains and identify an effective strain for managing the okra fruit and shoot borer, Earias vittella. Methodology: Six native Bacillus thuringiensis strains were cultured on T3 agar plates and incubated at 300C for 96 hrs. Subsequently, detailed examination of the endospores was conducted using a NanoSem 450 scanning electron microscope (SEM) to discern intrinsic differences between endospores from six isolates. Bioassays were performed using six native Bacillus thuringiensis cultures at variou
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Tampangallo, B. R., H. Anshary, S. Wulan, and R. Syah. "Characterization of Bacillus subtilis (BR 610) isolated from the intestines of Rabbitfish, Siganus guttatus, maintained in Floating Net at Awerange Bay, Barru." IOP Conference Series: Earth and Environmental Science 1273, no. 1 (2023): 012025. http://dx.doi.org/10.1088/1755-1315/1273/1/012025.

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Abstract The use of some species of Bacillus as a probiotic has been widely reported. In general, using probiotics in the exact isolation location will improve the performance of these probiotics. This study aims to characterize the Bacillus subtilis (BR610) isolate, successfully isolated from the intestines of Rabbitfish previously cultivated in the floating net of Awerange bay, Barru, South Sulawesi. The research includes morphological characterization of BR610 isolates, activity tests of amylase, cellulose, and proteinase enzyme. BR610 isolate inhibition test against several types of pathog
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Hieu, H. N., D. T. H. Trang, V. T. T. Hien, N. V. Nghia, N. T. Lam, and T. M. D. Nguyen. "Microorganism-mediated green synthesis of silver nanoparticles using Aspergillus niger and Bacillus megaterium." Digest Journal of Nanomaterials and Biostructures 17, no. 1 (2022): 359–67. http://dx.doi.org/10.15251/djnb.2022.171.359.

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Research in the field of nanotechnologies, the development of reliable and environmentally friendly processes for the synthesis of metallic nanoparticles constitutes an important element in this field. In this study, biosynthesis of silver nanoparticles using Bacillus megaterium and Aspergillus niger is reported. The results show that the characteristic UV-vis absorbance peak of AgNPs synthesized using Aspergillus niger was observed in the 433 - 448 nm range and around 475 nm with Bacillus megaterium. Most of the particles were spherical in shape and within a size range of 1 to 10.5 nm using A
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HOANG, Nhat Hieu, Van Nghia NGUYEN, Thi Tho NGUYEN, and Thi Mong Diep NGUYEN. "Impact of microwave synthesis time on the shape of silver nanostructures and their antibacterial activity." Journal of Metals, Materials and Minerals 33, no. 1 (2023): 101–6. http://dx.doi.org/10.55713/jmmm.v33i1.1631.

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Silver is a well-known effective antibacterial and disinfectant material with relatively few side effects. Nanosilver derived from it, have strong antibacterial, antifungal and broad-spectrum antiviral properties. This study describes how the microwave synthesis durations of silver nanoparticles affect their shape, and the effect of the shapes of these nanoparticles on their antibacterial activity. The optical properties of the nanosilver were examined through UV-Vis absorption spectroscopy. The morphology of the grain was determined by transmission electron microscopy (TEM), and the crystalli
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AL-MUDHAFFAR, EMAN M. A. AL-KHERSSANI AND ADNAN W. H. "Biosynthesis and Evaluation of the Qualitative Characteristics of Bacillus subtilis Silver Nanoparticles as Biopesticides." BIOPESTICIDES INTERNATIONAL 20, no. 01 (2024): 103. http://dx.doi.org/10.59467/bi.2024.20.103.

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Silver nanoparticles (AgNPs) were biosynthesized using Bacillus subtilis bacteria and characterized. First, the reaction color change from light to dark indicated the production of AgNPs. After that, the AgNPs were characterized by conducting a series of tests. UV/Vis spectrometer examination showed the highest value of the ultraviolet spectrum at 401 nm. The Fourier-transform infrared spectroscopy spectrometry examination showed primary and secondary amides from the solution, as evidenced by the presence of amino acid residues and proteins that strongly bind metals. When measuring X-ray diffr
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Book chapters on the topic "Bacillus sphericus"

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Dhang, Partho, Philip Koehler, Roberto Pereira, and Daniel D. Dye II. "Mosquitoes." In Key questions in urban pest management: a study and revision guide. CABI, 2022. http://dx.doi.org/10.1079/9781800620179.0003.

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Abstract This book chapter discusses mosquitoes as deadly disease vectors. Biological control is usually implemented for control of larval populations using predators (e.g. top feeding minnows and copepods) or pathogens and pathogen products (i.e., Bacillus thuringiensis israeliensis and B. sphericus). Genetic control is being implemented by releasing sterilized male mosquitoes (genetically modified, radiation sterilised, or transgenic mosquitoes). It starts with minimizing bites through the use of window screens on houses and animal shelters, and the use of treated bed nets and personal repel
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Updegrove, Taylor B., Domenico D’Atri, and Kumaran S. Ramamurthi. "Assembling the Bacillus subtilis Spore Coat Basement Layer on Spherical Supported Lipid Bilayers." In Methods in Molecular Biology. Springer US, 2023. http://dx.doi.org/10.1007/978-1-0716-3491-2_17.

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Acharya, Suchismita, Priyanka Dash, and M. Priyanka. "SYNTHESIS, CHARACTERIZATION AND ANTIBACTERIAL APPLICATIONS OF ZNO NANOPARTICLES UTILIZING SEED SOURCE OF MYRISTICA FRAGRANS (NUTMEG)." In Futuristic Trends in Chemical Material Sciences & Nano Technology Volume 3 Book 14. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3becs14p1ch1.

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ZnO nanoparticles were fabricated using plant seed extract from the Myristica fragrans species, utilising the solution combustion method and their antibacterial activities are investigated. ZnO nanoparticles are characterized by using Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction Techniques (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Transmission Electron Microscopy (TEM). The antibacterial activity against Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Acinetobacter baumannii were determined by using Broth-based tur
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Bagg, Jeremy, T. Wallace MacFarlane, Ian R. Poxton, and Andrew J. Smith. "Bacterial structure and physiology." In Essentials of microbiology for dental students. Oxford University PressOxford, 2005. http://dx.doi.org/10.1093/oso/9780198564898.003.0002.

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Abstract Most bacteria are either spherical (coccus) or rod-shaped (bacillus), and are usually arranged in a manner characteristic of the genus, growing either singly, in clusters or in chains. The dimensions of a bacterium are typically in the order of 1 μm (Fig. 2.1). As described in the previous chapter, bacteria are typical prokaryotes. Most bacteria can be divided into one of two types, Gram-positive and Gram-negative, by means of the Gram stain, which is summarized in Fig. 2.2. Although developed empirically by Christian Gram, a Danish microbiologist, in the 1880s as a convenient method
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McNamara, David R., and Franklin R. Cockerill. "Select Gram-negative Aerobic Bacteria." In Mayo Clinic Infectious Diseases Board Review. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199827626.003.0007.

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Gram-negative bacteria may be rod-shaped (bacilli), spherical (cocci), oval, helical, or filamentous. Cytoplasmic membrane is surrounded by a cell wall consisting of a peptidoglycan layer and an outer cell membrane. Gram-negative bacteria are widely distributed in the natural environment. They are commensals with many animals and play a vital role in normal human physiology as intestinal commensals. Gram-negative bacteria are the cause of various human illnesses. The gram-negative bacterial cell wall contains various lipopolysaccharide endotoxins. Endotoxins trigger intense inflammation and th
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Abdulwahab Alfahad, Maadh. "The Activity of New Bio-Agent to Control Cucumovirus Cucumber Mosaic Virus (CMV)." In Studies on Cucumber (Cucumis sativus L.) [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96587.

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CMV virus is worldwide, especially in temperate regions, where it can infect more than 800 plant species belonging to about 40 families. Although the main factor that the plant takes in order not to be infected is because it has preventive means that inhibit the direction of pathogens so that the infection occurs under conditions that suit it and suit its success. Cucumber Mosaic Virus belongs to the group of plant viruses to the genus Cucumovirus, as the virus particles are symmetrically spherical, not enveloped, with a diameter of 29 nm, and the virus has several strains that differ among th
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Conference papers on the topic "Bacillus sphericus"

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Virteiu, Ana-Maria, Ioana Grozea, Ramona Stef, Codruta Chis, and Ion Arsinte. "EFFICACY OF ENTOMOPATHOGENIC MICROORGANISMS FOR ECOFRENDLY MANAGEMENT OF HELICOVERA ARMIGERA (HUB) LARVAE IN CORN CROP." In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023v/6.2/s25.18.

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In the western part of Romania, Helicoverpa armigera larvae cause significant damage to several types of agricultural and horticultural crops leading to considerable economic losses, so the purpose of this paper was the use of some ecofrendly agricultural practices, namely the use of entomopathogenic microorganisms. The field experiment was conducted at the Research farm of West Land Company SRL, Jimbolia, (Timis County). The trial was laid out during 2022 vegetation season, in randomized block design with seven treatments: control plot, Bacillus sphericus + Glomus (2%) � 5 l/ ha, Metarhizium
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