Characterization of Microbial Communities Associated with Ceramic Raw Materials as Potential Contributors for the Improvement of Ceramic Rheological Properties

García‐Sánchez, Ángela María; Machado-Moreira, Bernardino; Freire, M. N.; Santos, Ricardo; Monteiro, Sílvia; Dias, Dylmar Penteado; Neves, Orquídia; Dionísio, Amélia; Miller, Ana Z.

doi:10.3390/min9050316

Cited by 3 publications

(3 citation statements)

References 65 publications

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“…Analysis of the fungal communities demonstrated that Mortierella occupied most of the communities. Motierella is commonly found in cave soils and has been identified in moonmilk in many caves (Rutherford and Huang, 1994;Garcia-Sanchez et al, 2019).…”

Section: Taxonomic Composition Of Microbial Communities In the Two Tymentioning

confidence: 99%

Microbial Diversity in Moonmilk of Baeg-nyong Cave, Korean CZO

et al. 2020

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The Baeg-nyong cave is a limestone cave which has been nominated as the first critical zone observatory (CZO) in South Korea. Moonmilk is a well-known speleothem composed of various carbonate minerals. To characterize moonmilk from the Baegnyong cave, we performed mineralogical analyses and applied high-throughput 16S rRNA gene sequencing to analyze the microbial communities, including bacteria and fungi, of dry and wet moonmilk samples. The results showed that the dry and wet moonmilk samples had different and atypical crystal structures, although they were predominantly composed of CaCO 3. Furthermore, metagenomic data revealed that the dry and wet moonmilk samples collected from an oligotrophic environment had completely different bacterial communities when compared to the outside soil, and there was a difference in bacterial communities even between dry and wet moonmilk specimens. Fungal communities, however, did not differ significantly between dry and wet moonmilk samples. This study is the first metagenomic analysis of two different types of moonmilk with different physical properties and the first report on the microbial diversity of moonmilk from a cave in the first CZO in South Korea.

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Section: Taxonomic Composition Of Microbial Communities In the Two Tymentioning

confidence: 99%

Microbial Diversity in Moonmilk of Baeg-nyong Cave, Korean CZO

et al. 2020

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“…Micrococcus luteus is a coccus shaped gram-positive bacteria. It is an aerobic exopolysaccharide producing bacteria that may be found on the skin, mouth and sometimes in the throat of mammals 13,14 . Oral microbial flora of reptiles includes bacteria from Proteus, Porphyromonas, Micrococcus, Salmonella and Staphylococcus genera 5,8,15 .…”

Section: Resultsmentioning

confidence: 99%

First Report of Micrococcus luteus in the Buccal Cavity of Bearded Dragon (Pogona vitticeps) in Namibia

Mataranyika¹,

Chimwamurombe²

2019

J Pure Appl Microbiol

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Citation: Paidamoyo N. Mataranyika and Percy M. Chimwamurombe, First Report of Micrococcus luteus in the Buccal Cavity of Bearded Dragon (Pogona vitticeps) in Namibia, J Pure Appl Microbiol., 2019; 13(4):2123-2127. https://doi.org/10.22207/ JPAM.13.4.24 AbstractCentral bearded dragons, Pogona vitticeps, are ectothermic heliotherms native to dry and arid regions and are often kept as exotic pets in colder less arid countries. They do however, often fall sick resulting in sudden death. This is now known to be caused by bacterial infections such as Listeria monocytogenes and Porphyromonas pogonae sp. This study therefore, aimed to identify microorganisms present in the buccal cavity of the central bearded dragon (P. vitticeps) in Namibia. In order to achieve this, oral swabs were taken from a bearded dragon found in a garden in Windhoek, Namibia and grown in nutrient agar. Colony morphology was described before Gram's staining to differentiate the bacteria. The automated VITEK®2 system was used to identify the bacteria. On nutrient agar, opaque yellow circular colonies were observed after 24hrs incubation at 37°C. A gram-positive coccus shaped bacteria was observed. VITEK®2 analysis identified the bacteria as Micrococcus luteus. There has not been a study on the microbiota of the buccal cavity of the central bearded dragon in Namibia.

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“…Technical ceramics are classified based on functionality such as biocompatibility, electrical properties, optical properties, mechanical strength, and resistance to high temperatures according to the following types: Medical ceramics; electroceramics; optical ceramics; structural ceramics and ceramics for extreme conditions; ceramics for energy transfer, storage and conversion; and other types of ceramics [96,97].…”

Section: Classification Of Technical Ceramics and Its Workability By Edmmentioning

confidence: 99%

On Electrical Discharge Machining of Non-Conductive Ceramics: A Review

et al. 2019

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The inability of ceramic and nanoceramic processing without expensive diamond tools and with a high-material-removal rate hampers the scope of its potential applications and does not allow humanity to make a full shift to the sixth technological paradigm associated with Kuhn scientific revolutions and Kondratieff's waves and restrains the growth of the economy. The authors completed a review on the research state of ceramic and nanoceramic processing by electrical discharge machining, which is possibly solved by two principal approaches associated with the usage of standard commercially available machine tools. The first approach is related to the introduction of expensive secondary phase; the second approach proposes initiate processing by adding auxiliary electrodes in the form of coating, suspension, aerosol, or 3D-printed layer based on the components of silver, copper, or graphite in combination with an improved dielectric oil environment by introducing graphite or carbon nanoparticles, which is hugely relevant today.Technologies 2019, 7, 55 2 of 16 of cutting tools limits the resulting geometry of the product. Other machining methods such as vibroacoustic machining, laser and electron beam scribing, selective laser sintering with a binder, find their specific place in the processing of ceramics. However, they do not allow the receiving of all geometrically possible shapes of the product without losses on the operational parameters of ceramics [16][17][18].One of the most popular methods for the production of parts, regardless of their hardness, is electrical discharge machining (EDM). However, it requires the material to be conductive [19][20][21]. The process of electrical erosion of the material consists of initiating electric pulses in the interelectrode gap, in the breakdown of the dielectric medium in the gap, in establishing a discharge channel, where the temperature reaches more than 10,000 • C (low-temperature plasma). Due to such temperatures, the material is ablated, the drops of cooled material as eroded debris are washed away by the flow of the dielectric medium, and the electrodes again approach to resume the cycle. Thus, a unique crater-like topology on the surface of the workpiece is created [22][23][24][25].The inability of ceramics and nanoceramics to conduct current hampers the scope of its potential applications and restrains the growth of the progress and the switch to the next technological paradigm that most of the scientists associate with the term "nano" [26][27][28][29][30][31][32].Thus, it can be concluded that the study and development of a method for electrical discharge machining of non-conductive ceramics and nanoceramics are incredibly relevant today.The authors propose to apply the dialectical approach of cognition as a scientific approach to solve the formulated scientific problem. The dialectical approach includes the systematization and updating of existing knowledge and new data about the object of research.

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Characterization of Microbial Communities Associated with Ceramic Raw Materials as Potential Contributors for the Improvement of Ceramic Rheological Properties

Cited by 3 publications

References 65 publications

Microbial Diversity in Moonmilk of Baeg-nyong Cave, Korean CZO

Microbial Diversity in Moonmilk of Baeg-nyong Cave, Korean CZO

First Report of Micrococcus luteus in the Buccal Cavity of Bearded Dragon (Pogona vitticeps) in Namibia

On Electrical Discharge Machining of Non-Conductive Ceramics: A Review

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