Journal articles: 'Kratochvilova'

1

Phaff, H. J. "Yeasts and Yeast-Like Organisms.Anna Kockova-Kratochvilova." Quarterly Review of Biology 67, no. 1 (March 1992): 57. http://dx.doi.org/10.1086/417477.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Tinwell, H., MJL Clapp, and J. Ashby. "Fate of unfertilized ova in male rodent dominant lethal assays: Extension of the studies by Kratochvilova." Mutation Research/Genetic Toxicology 368, no. 3-4 (July 1996): 309–17. http://dx.doi.org/10.1016/s0165-1218(96)90073-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Kotásek, Miroslav. "Hranice, možnosti a úlohy komentáře (Jiří Kratochvil, Ludvík Vaculík)." Bohemistyka, no. 1 (March 15, 2020): 55–71. http://dx.doi.org/10.14746/bo.2020.1.3.

Full text

Abstract:

Na obecné úrovni se článek zabývá fungováním komentáře či metakomentáře v postmoderních prozaických textech. K doložení a rozpracování teoretických východisek využívá článek texty Jiřího Kratochvila a Ludvíka Vaculíka. Z pohledu hermeneutiky je struktura, která se odhaluje uvnitř literárních textů právě prostřednictvím komentáře, nazvána posthermeneutickou. Článek ukazuje, že tato posthermeneutická struktura je pevně spojena s perverzní situací ineditního publikování v Československu 70. let jak ji zachycuje Vaculíkův Český snář, stejně jako se situací ženského subjektu zobrazené v Kratochvilově povídce Příběh krále Kandaula. Článek dochází k závěru, že postmoderna staví čtenáře či recipienta před etickou volbu co se role literatury a obecně umění týče.

APA, Harvard, Vancouver, ISO, and other styles

4

HAMAMOTO, MAKIKO, JUNTA SUGIYAMA, and KAZUO KOMAGATA. "Rhodosporidium kratochvilovae sp. nov. A new basidiomycetous yeast species." Journal of General and Applied Microbiology 34, no. 2 (1988): 119–25. http://dx.doi.org/10.2323/jgam.34.119.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Byrtusová, Dana, Volha Shapaval, Jiří Holub, Samuel Šimanský, Marek Rapta, Martin Szotkowski, Achim Kohler, and Ivana Márová. "Revealing the Potential of Lipid and β-Glucans Coproduction in Basidiomycetes Yeast." Microorganisms 8, no. 7 (July 13, 2020): 1034. http://dx.doi.org/10.3390/microorganisms8071034.

Full text

Abstract:

Beta (β)–glucans are polysaccharides composed of D-glucose monomers. Nowadays, β-glucans are gaining attention due to their attractive immunomodulatory biological activities, which can be utilized in pharmaceutical or food supplementation industries. Some carotenogenic Basidiomycetes yeasts, previously explored for lipid and carotenoid coproduction, could potentially coproduce a significant amount of β–glucans. In the present study, we screened eleven Basidiomycetes for the coproduction of lipids and β–glucans. We examined the effect of four different C/N ratios and eight different osmolarity conditions on the coproduction of lipids and β–glucans. A high-throughput screening approach employing microcultivation in microtiter plates, Fourier Transform Infrared (FTIR) spectroscopy and reference analysis was utilized in the study. Yeast strains C. infirmominiatum CCY 17-18-4 and R. kratochvilovae CCY 20-2-26 were identified as the best coproducers of lipids and β-glucans. In addition, C. infirmominiatum CCY 17-18-4, R. kratochvilovae CCY 20-2-26 and P. rhodozyma CCY 77-1-1 were identified as the best alternative producers of β-glucans. Increased C/N ratio led to increased biomass, lipid and β-glucans production for several yeast strains. Increased osmolarity had a negative effect on biomass and lipid production while the β-glucan production was positively affected.

APA, Harvard, Vancouver, ISO, and other styles

6

Byrtusová, Dana, Martin Szotkowski, Klára Kurowska, Volha Shapaval, and Ivana Márová. "Rhodotorula kratochvilovae CCY 20-2-26—The Source of Multifunctional Metabolites." Microorganisms 9, no. 6 (June 11, 2021): 1280. http://dx.doi.org/10.3390/microorganisms9061280.

Full text

Abstract:

Multifunctional biomass is able to provide more than one valuable product, and thus, it is attractive in the field of microbial biotechnology due to its economic feasibility. Carotenogenic yeasts are effective microbial factories for the biosynthesis of a broad spectrum of biomolecules that can be used in the food and feed industry and the pharmaceutical industry, as well as a source of biofuels. In the study, we examined the effect of different nitrogen sources, carbon sources and CN ratios on the co-production of intracellular lipids, carotenoids, β–glucans and extracellular glycolipids. Yeast strain R. kratochvilovae CCY 20-2-26 was identified as the best co-producer of lipids (66.7 ± 1.5% of DCW), exoglycolipids (2.42 ± 0.08 g/L), β-glucan (11.33 ± 1.34% of DCW) and carotenoids (1.35 ± 0.11 mg/g), with a biomass content of 15.2 ± 0.8 g/L, by using the synthetic medium with potassium nitrate and mannose as a carbon source. It was shown that an increased C/N ratio positively affected the biomass yield and production of lipids and β-glucans.

APA, Harvard, Vancouver, ISO, and other styles

7

Fišer, Zbyněk. "Estetika překvapení v prózách Jiřího Kratochvila jako překladatelský problém." Bohemica litteraria, no. 1 (2018): 113–21. http://dx.doi.org/10.5817/bl2018-1-12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Szotkowski, Martin, Jiří Holub, Samuel Šimanský, Klára Hubačová, Pavlína Sikorová, Veronika Mariničová, Andrea Němcová, and Ivana Márová. "Bioreactor Co-Cultivation of High Lipid and Carotenoid Producing Yeast Rhodotorula kratochvilovae and Several Microalgae under Stress." Microorganisms 9, no. 6 (May 28, 2021): 1160. http://dx.doi.org/10.3390/microorganisms9061160.

Full text

Abstract:

The co-cultivation of red yeasts and microalgae works with the idea of the natural transport of gases. The microalgae produce oxygen, which stimulates yeast growth, while CO2 produced by yeast is beneficial for algae growth. Both microorganisms can then produce lipids. The present pilot study aimed to evaluate the ability of selected microalgae and carotenogenic yeast strains to grow and metabolize in co-culture. The effect of media composition on growth and metabolic activity of red yeast strains was assessed simultaneously with microalgae mixotrophy. Cultivation was transferred from small-scale co-cultivation in Erlenmeyer flasks to aerated bottles with different inoculation ratios and, finally, to a 3L bioreactor. Among red yeasts, the strain R. kratochvilovae CCY 20-2-26 was selected because of the highest biomass production on BBM medium. Glycerol is a more suitable carbon source in the BBM medium and urea was proposed as a compromise. From the tested microalgae, Desmodesmus sp. were found as the most suitable for co-cultivations with R. kratochvilovae. In all co-cultures, linear biomass growth was found (144 h), and the yield was in the range of 8.78–11.12 g/L of dry biomass. Lipids increased to a final value of 29.62–31.61%. The FA profile was quite stable with the UFA portion at about 80%. Around 1.98–2.49 mg/g CDW of carotenoids with torularhodine as the major pigment were produced, ubiquinone production reached 5.41–6.09 mg/g, and ergosterol yield was 6.69 mg/g. Chlorophyll production was very low at 2.11 mg/g. Pilot experiments have confirmed that carotenogenic yeasts and microalgae are capable of symbiotic co-existence with a positive impact om biomass growth and lipid metabolites yields.

APA, Harvard, Vancouver, ISO, and other styles

9

Lee, Ji Won, Eun Jung Lee, Seung Sik Yoo, Sung Hoon Park, Hee Sook Kim, and Eun Yeol Lee. "Enantioselective hydrolysis of racemic styrene oxide by epoxide hydrolase ofRhodosporidium kratochvilovae SYU-08." Biotechnology and Bioprocess Engineering 8, no. 5 (October 2003): 306–8. http://dx.doi.org/10.1007/bf02949223.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sampaio, J. P., M. Gadanho, S. Santos, F. L. Duarte, C. Pais, A. Fonseca, and J. W. Fell. "Polyphasic taxonomy of the basidiomycetous yeast genus Rhodosporidium: Rhodosporidium kratochvilovae and related anamorphic species." International Journal of Systematic and Evolutionary Microbiology 51, no. 2 (March 1, 2001): 687–97. http://dx.doi.org/10.1099/00207713-51-2-687.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Cui, Jinjin, Shiwu He, Xiuling Ji, Lianbing Lin, Yunlin Wei, and Qi Zhang. "Identification and characterization of a novel bifunctional Δ12/Δ15-fatty acid desaturase gene from Rhodosporidium kratochvilovae." Biotechnology Letters 38, no. 7 (March 31, 2016): 1155–64. http://dx.doi.org/10.1007/s10529-016-2090-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Patel, Alok, Vikas Pruthi, Rajesh P. Singh, and Parul A. Pruthi. "Synergistic effect of fermentable and non-fermentable carbon sources enhances TAG accumulation in oleaginous yeast Rhodosporidium kratochvilovae HIMPA1." Bioresource Technology 188 (July 2015): 136–44. http://dx.doi.org/10.1016/j.biortech.2015.02.062.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Wang, Jun, Wei Chen, Hongjuan Nian, Xiuling Ji, Lianbing Lin, Yunlin Wei, and Qi Zhang. "Inhibition of Polyunsaturated Fatty Acids Synthesis Decreases Growth Rate and Membrane Fluidity of Rhodosporidium kratochvilovae at Low Temperature." Lipids 52, no. 8 (June 28, 2017): 729–35. http://dx.doi.org/10.1007/s11745-017-4273-y.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Castoria, Raffaello, Luisa Mannina, Rosa Durán-Patrón, Francesca Maffei, Anatoly P. Sobolev, Dario V. De Felice, Cristina Pinedo-Rivilla, Alberto Ritieni, Rosalia Ferracane, and Sandra A. I. Wright. "Conversion of the Mycotoxin Patulin to the Less Toxic Desoxypatulinic Acid by the Biocontrol Yeast Rhodosporidium kratochvilovae Strain LS11." Journal of Agricultural and Food Chemistry 59, no. 21 (November 9, 2011): 11571–78. http://dx.doi.org/10.1021/jf203098v.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Patel, Alok, Dev K. Sindhu, Neha Arora, Rajesh P. Singh, Vikas Pruthi, and Parul A. Pruthi. "Biodiesel production from non-edible lignocellulosic biomass of Cassia fistula L. fruit pulp using oleaginous yeast Rhodosporidium kratochvilovae HIMPA1." Bioresource Technology 197 (December 2015): 91–98. http://dx.doi.org/10.1016/j.biortech.2015.08.039.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Syakalima, Michelo, Tsepo Ramatla, and Ngoma Lubanza. "Opportunistic pathogenic fungi isolated from feces of feral pigeons in Mafikeng, North West Province of South Africa." July-2019 12, no. 7 (July 2019): 1066–69. http://dx.doi.org/10.14202/vetworld.2019.1066-1069.

Full text

Abstract:

Background and Aim: Pigeon feces are increasingly being implicated in the spread of bacterial pathogens such as Escherichia coli, Campylobacter, Salmonella, Listeria, and Chlamydia. Fungi are rarely investigated except for Cryptococcus that has emerged as an important pathogen in old people and immunosuppressed patients. This study investigated fungi in pigeon feces collected from Mafikeng, the North West Province of South Africa. Materials and Methods: Freshly dropped feces were collected and enriched in phosphate-buffered saline overnight at 48°C and then subcultured on Sabouraud's dextrose agar and incubated at 48°C for 2 weeks observing any fungal growth from day 2. The growths were picked up, DNA extracted, and polymerase chain reaction was done using the internal transcribed spacer primers. Results: Fungi isolated included: Aspergillus (Aspergillus tubingensis), Cryptococcus (Cryptococcus albidus and Cryptococcus randhawai), Fusarium spp., and Rhodotorula (Rhodotorula mucilaginosa and Rhodotorula kratochvilovae). Most of these isolates are known opportunistic pathogens and have been isolated in clinical conditions elsewhere. Other isolates such as Graphium dubautiae, Myrmecridium schulzeri, Naganishia albida, Paecilomyces lilacinus, and Zygopleurage zygospora were not found to be of any human health significance. Conclusion: We, therefore, concluded that the presence of these opportunistic pathogens is a significant human health risk, especially in the face of the HIV/AIDS pandemic that results in immunosuppression.

APA, Harvard, Vancouver, ISO, and other styles

17

Patel, Alok, Km Sartaj, Parul A. Pruthi, Vikas Pruthi, and Leonidas Matsakas. "Utilization of Clarified Butter Sediment Waste as a Feedstock for Cost-Effective Production of Biodiesel." Foods 8, no. 7 (June 29, 2019): 234. http://dx.doi.org/10.3390/foods8070234.

Full text

Abstract:

The rising demand and cost of fossil fuels (diesel and gasoline), together with the need for sustainable, alternative, and renewable energy sources have increased the interest for biomass-based fuels such as biodiesel. Among renewable sources of biofuels, biodiesel is particularly attractive as it can be used in conventional diesel engines without any modification. Oleaginous yeasts are excellent oil producers that can grow easily on various types of hydrophilic and hydrophobic waste streams that are used as feedstock for single cell oils and subsequently biodiesel production. In this study, cultivation of Rhodosporidium kratochvilovae on a hydrophobic waste (clarified butter sediment waste medium (CBM)) resulted in considerably high lipid accumulation (70.74% w/w). Maximum cell dry weight and total lipid production were 15.52 g/L and 10.98 g/L, respectively, following cultivation in CBM for 144 h. Neutral lipids were found to accumulate in the lipid bodies of cells, as visualized by BODIPY staining and fluorescence microscopy. Cells grown in CBM showed large and dispersed lipid droplets in the intracellular compartment. The fatty acid profile of biodiesel obtained after transesterification was analyzed by gas chromatography-mass spectrometry (GC–MS), while its quality was determined to comply with ASTM 6751 and EN 14214 international standards. Hence, clarified sediment waste can be exploited as a cost-effective renewable feedstock for biodiesel production.

APA, Harvard, Vancouver, ISO, and other styles

18

Alexander, Méndez Polo César, Quiroz Rodríguez Freddy Jonathan, Soriano Bernilla Bertha Soledad, Rojas-Padilla Carmen Rosa, and Vásquez-Villalobos Víctor Javier. "Lipid yields from oleaginous yeasts isolated from the north Peruvian Andes by culture media non-limiting nitrogen." Journal of Applied and Natural Science 13, no. 2 (June 2, 2021): 607–15. http://dx.doi.org/10.31018/jans.v13i2.2670.

Full text

Abstract:

Oleochemicals can be obtained from oily yeasts due to their ability to produce a high lipid content. This research aimed to isolate them from the North Peruvian Andes with a lipid content greater than 20%. They were identified by sequencing internal transcribed spacer regions ITS of conserved ribosomal DNA (rDNA), evaluate their growth kinetics, biomass and lipid yields, using culture media with C/N 100:1+xylose (MS-1-7) and 2:1+glucose (MS-2-7). Growth kinetics up to the maximum stationary phase was evaluated using the parameterized Gompertz type II model. Rhodotorula glutinis, R. mucilaginosa, and R. kratochvilovae were selected. The C/N ratio in the culture medium influenced growth kinetics, biomass and lipids yields. With MS-1-7, a high specific growth rate (?max) was obtained, reaching the stationary phase between 6 to 9 h and the highest lipid accumulation between 23.1% and 31.5%. With the MS-2-7 medium, maximum biomass value obtained in the stationary phase between 37 and 51 h, which generated the highest biomass yields at the end of the entire process and lipid yield of 4.65, 5.59, and 8.80 g L-1 in the strains mentioned. There is potential to obtain high lipid yields using a culture media non-limiting nitrogen, examining not only the C/N ratio. But also, the quantities, nature of the components, and type of oleaginous yeasts taking care to avoid a high carbon concentration to prevent the Cabtree effect.

APA, Harvard, Vancouver, ISO, and other styles

19

Żygadło-Czopnik, Dorota. "Dorastanie naznaczone traumą historii. Kilka refleksji nad powieściami Jiříego Kratochvila „Uprostřed nocí zpěv” i Magdaleny Tulli „Włoskie szpilki”." Miscellanea Posttotalitariana Wratislaviensia 6 (October 10, 2017): 245–56. http://dx.doi.org/10.19195/2353-8546.6.19.

Full text

Abstract:

Growing up marked by trauma in Jiří Kratochvil’s, Uprostřed nocí zpěv and Magdalena Tulla’s, Włoskie szpilkiThe process of political change began in Czechoslovakia at the end of 1989, a few months after the so-called Polish Round Table Talks, and after the events in Hungary, East Germany or Bulgaria, foretelling the political transformations in those countries. Poles and Czechs are nations steeped in history, whose rhythm is defined by traumas, many of which still await their artistic disarmament. Czech history is completely different than that of Poles. As a result of the tangled history, Czech and Polish national identities are not fully defined. The key objective of the proposed paper is to examine how the contemporary Polish and Czech writers confront their totalitarian heritage. We would like to focus on the works of a Moravian author Jiří Kratochvil b. 1940 in Brno, who is undervalued and barely known in Poland, and of a Polish writer Magdalena Tulla b. 1955. As a matter of fact, Jiří Kratochvil was truly discovered in the Czech Republic only after November 1989.Взросление в тени исторической травмы в повести Иржи Кратохвила Uprostřed nocí zpěv и Магдалены Тулли Włoskie szpilkiПроцесс политических преобразований начался в Чехословакии в конце 1989 года, спустя несколько месяцев после польских переговоров т. наз. круглого стола и после событий в Венгрии, ГДР или Болгарии, которые предвещали политико-режимные трансформации в этих странах. Поляки и чехи — это народы, погруженные в историю, а ее ритм в польском и чешском мышлении диктуют травмы. Многие из них еще предстоит обезвредить при помощи инструментов искусства. Чешская история во многом отличается от нашей. По причине непростой истории чешская и польская национальные идентичности не получили своего четкого определения. Основной целью предлагаемого доклада является исследование того, как современные польские и чешские писатели сводят счеты с тоталитарным наследием. Главное внимание будет уделено творчеству моравского писателя Иржи Кратохвила 1940 г.р., Брно, автора малоизвестного в Польше, а также польской писательницы Магдалены Тулли 1955 г.р.. Иржи Кратохвил и в самой Чехии приобрел признание только после ноября 1989 года.

APA, Harvard, Vancouver, ISO, and other styles

20

Patel, Alok, Mohammad Pravez, Farha Deeba, Vikas Pruthi, Rajesh P. Singh, and Parul A. Pruthi. "Boosting accumulation of neutral lipids in Rhodosporidium kratochvilovae HIMPA1 grown on hemp (Cannabis sativa Linn) seed aqueous extract as feedstock for biodiesel production." Bioresource Technology 165 (August 2014): 214–22. http://dx.doi.org/10.1016/j.biortech.2014.03.142.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Balcerzak, Małgorzata. "„Je to hra, v níž každý váš pohyb je v centru silového pole...”. O kapilarności władzy w powieści „Lehni, bestie!” J. Kratochvila." Poznańskie Studia Slawistyczne, no. 5 (January 1, 2013): 19. http://dx.doi.org/10.14746/pss.2013.5.1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Spicher, G. "Kocková-Kratochvilová. A.: Yeasts and yeast-like Organisms. VCH Verlagsgesellschaft mbH Weinheim, New York, Basel, Cambridge 1990, 546 Seiten, mit 166 Abb. und 102 Tab., DM 164,-." Starch - Stärke 43, no. 8 (1991): 329. http://dx.doi.org/10.1002/star.19910430814.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Braun, D. "P. C. Barbé, J.-C. Brosse, G. Cecchin, D. Derouet, K. Dusek, F. Epaillard, T. Higashimura, J. Kratochvila, G. Legeay, M. Lesna, T. Masuda, J. Mejzlik, L. Noristi, J.-C. Soutif: Catalyticat and radical polymerization, Vol. 81 aus der Reihe: Advances in Pol." Berichte der Bunsengesellschaft für physikalische Chemie 91, no. 12 (December 1987): 1396–97. http://dx.doi.org/10.1002/bbpc.19870911218.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Immergut, E. H. "Advances in polymer science—81 (catalytical and radical polymerization), by P. C. Barbe, J.-C. Brosse, G. Cecchin, D. Derouet, K. Dusek, F. Epaillar, T. Higashimura, J. Kratochvila, G. Legeay, M. Lesna, T. Masuda, J. Mejzlik, L. Noristi, and J.-C. Soutif, Springer-Verlag, New York, 1986, 240 pp." Journal of Polymer Science Part C: Polymer Letters 25, no. 7 (July 1987): 304–5. http://dx.doi.org/10.1002/pol.1987.140250708.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Guo, Rui, Meixia He, Xiaoqing Zhang, Xiuling Ji, Yunlin Wei, Qi-Lin Zhang, and Qi Zhang. "Genome-Wide Transcriptional Changes of Rhodosporidium kratochvilovae at Low Temperature." Frontiers in Microbiology 12 (September 16, 2021). http://dx.doi.org/10.3389/fmicb.2021.727105.

Full text

Abstract:

Rhodosporidium kratochvilovae strain YM25235 is a cold-adapted oleaginous yeast strain that can grow at 15°C. It is capable of producing polyunsaturated fatty acids. Here, we used the Nanopore Platform to first assemble the R. kratochvilovae strain YM25235 genome into a 23.71 Mb size containing 46 scaffolds and 8,472 predicted genes. To explore the molecular mechanism behind the low temperature response of R. kratochvilovae strain YM25235, we analyzed the RNA transcriptomic data from low temperature (15°C) and normal temperature (30°C) groups using the next-generation deep sequencing technology (RNA-seq). We identified 1,300 differentially expressed genes (DEGs) by comparing the cultures grown at low temperature (15°C) and normal temperature (30°C) transcriptome libraries, including 553 significantly upregulated and 747 significantly downregulated DEGs. Gene ontology and pathway enrichment analysis revealed that DEGs were primarily related to metabolic processes, cellular processes, cellular organelles, and catalytic activity, whereas the overrepresented pathways included the MAPK signaling pathway, metabolic pathways, and amino sugar and nucleotide sugar metabolism. We validated the RNA-seq results by detecting the expression of 15 DEGs using qPCR. This study provides valuable information on the low temperature response of R. kratochvilovae strain YM25235 for further research and broadens our understanding for the response of R. kratochvilovae strain YM25235 to low temperature.

APA, Harvard, Vancouver, ISO, and other styles

26

Jiru, Tamene Milkessa, Marizeth Groenewald, Carolina Pohl, Laurinda Steyn, Nicholas Kiggundu, and Dawit Abate. "Optimization of cultivation conditions for biotechnological production of lipid by Rhodotorula kratochvilovae (syn, Rhodosporidium kratochvilovae) SY89 for biodiesel preparation." 3 Biotech 7, no. 2 (June 2017). http://dx.doi.org/10.1007/s13205-017-0769-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Jiru, Tamene Milkessa, Laurinda Steyn, Carolina Pohl, and Dawit Abate. "Production of single cell oil from cane molasses by Rhodotorula kratochvilovae (syn, Rhodosporidium kratochvilovae) SY89 as a biodiesel feedstock." Chemistry Central Journal 12, no. 1 (August 10, 2018). http://dx.doi.org/10.1186/s13065-018-0457-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Kofman, V. "Разработка перспективных способов обработки сточных вод с извлечением энергии в КНР и Индии (обзор)." Vodosnabzhenie i sanitarnaia tehnika, no. 1 (January 20, 2020). http://dx.doi.org/10.35776/mnp.2020.01.07.

Full text

Abstract:

В КНР ведутся активные исследования по разработке технологии ферментации избыточного активного ила с получением водорода. Процесс анаэробной ферментации состоит из трех основных стадий: гидролиз, образование водорода и кислот, образование метана. На стадии гидролиза происходит образование низкомолекулярных веществ из высокомолекулярного крахмала, волокон и белков. На стадии образования водорода и кислот гидрогеногенные и ацидогенные бактерии ферментируют низкомолекулярные вещества с образованием ряда органических кислот, водорода и диоксида углерода. На стадии образования метана метаногенные бактерии метаболизируют продукты, образовавшиеся на предыдущих стадиях с выделением метана и диоксида углерода. В результате получить водород можно только путем ингибирования активности метаногенных бактерий, не оказывая при этом воздействия на активность гидрогеногенных бактерий. С учетом этих обстоятельств разрабатывают способы интенсификации производства биоводорода. Основные усилия в данной области направлены на поиск штаммов с высокой эффективностью анаэробной ферментации. Другим направлением является выбор способа предварительной обработки активного ила из числа тепловой, кислотной, щелочной, СВЧ-обработки, стерилизации и ультразвуковой обработки. Значительные перспективы связывают с использованием консорциума микроорганизмов и смешанного субстрата, содержащего наряду с осадками сточных вод пищевые отходы, солому или навоз. В Индии получило развитие направление обработки сточных вод различных промышленных производств с получением обогащенной липидами биомассы для последующего производства биодизельного топлива. Исследования проведены с использованием бактерий Rhodococcus opacus, дрожжей Rhodosporidium kratochvilovae и микроводорослей Desmodesmus sp.In China, active research is underway for developing a technology for excess activated sludge fermentation to obtain hydrogen. The process of anaerobic fermentation includes three main stages: hydrolysis, formation of hydrogen and acids, and methane generation. At the hydrolysis stage, the formation of low-molecular substances from high-molecular starch, fibers and proteins. At the stage of the hydrogen and acids formation hydrogenogenic and acetogenic bacteria ensure the fermentation of low-molecular substances with the formation of a number of organic acids, hydrogen and carbon dioxide. At the stage of methane generation, methanogenic bacteria metabolize the products formed in the previous stages with the release of methane and carbon dioxide. As a result, hydrogen can be obtained only by inhibiting the activity of methanogenic bacteria eliminating the impact on the activity of hydrogenogenic bacteria. Considering these circumstances methods are being developed to enhance the production of biohydrogen. The main efforts in this area aim at finding strains with high efficiency of anaerobic fermentation. Another direction is choosing a method of activated sludge pre-treatment from among thermal, acid, alkaline, microwave treatment, sterilization and ultrasonic treatment. Significant prospects are associated with the use of a consortium of microorganisms and mixed substrate containing, along with wastewater sludge, food waste, straw or manure. In India, the technologies of processing various types of industrial wastewater with the production of biomass enriched with lipids for the subsequent production of biodiesel have been on the march. The studies have been performed using Rhodococcus opacus bacteria, Rhodosporidium kratochvilovae yeast and Desmodesmus sp microalgae.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Kratochvilova'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles