Consulta: subjectFacets:"Heterotrophic bacteria"
Registros recuperados: 9
Data/hora: 11/06/2024 11:21:30

Комплексы гетеротрофных микроорганизмов прибережного мелководья бухты Казачья (Чёрное море)
Provedor de dados: 13
Autores: Смирнова, Л. Л.
Исследована сезонная динамика численности гетеротрофных бактерий и микромицетов, участвующих в разрушении органического вещества в различных биотопах б. Казачья. Показано, что численность гетеротрофных бактерий в 100 – 1000 раз превышает таковую грибов в морской пене, поверхностном микрослое воды и донных отложениях. Низкая солёность, повышенное содержание органического вещества и возрастание соотношения C/N ≥20 благоприятны для развития микобиоты в донных отложениях. Из исследованных биотопов выделено 44 вида микромицетов, отнесённых к митоспоровым грибам (Deuteromycetes). В поверхностном микрослое воды доминировал Cladosporium cladosporioides, в донных отложениях часто встречались представители родов Aspergillus, Penicillium, Phoma, Mucor.
Tipo: Journal Contribution
Palavras-chave: Гетеротрофные бактерии; Микромицеты; Абиотические факторы; Морская пена; Донные отложения; Казачья бухта; Севастополь; Чёрное море; Гетеротрофні бактерії; Мікромицети; Абіотичні чинники; Морська піна; Донні відкладе; Чорне море; Heterotrophic bacteria; Fungi; Abiotic factors; Upper layers of water surface; Bottom sediments; Black Sea.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1938

Микробиологическая характеристика прибрежных наносов региона Севастополя (Черное море)
Provedor de dados: 13
Autores: Миронов, О. Г.
Получены данные о численности и биохимических особенностях микрофлоры в прибрежных наносах регио­на Севастополя. Установлено, что бактерии способны трансформировать основные классы органических веществ (белки, липиды, углеводы), а также использовать нефть и фенол в качестве единственного источни­ка углерода и энергии. Численность бактериального населения и соотношение отдельных групп бактерий зависят от места расположения станций отбора проб и гидрометеорологических факторов, в частности, атмо­сферных осадков и непосредственного воздействия антропогенного фактора - сброса сточных вод.
Tipo: Journal Contribution
Palavras-chave: Прибрежные наносы; Гетеротрофные бактерии; Черное море; Marine deposits of littoral line; Heterotrophic bacteria; Black Sea Heterotrophic organisms Bacteria Bacteria http://aims.fao.org/aos/agrovoc/c_765.
Ano: 2005
URL: http://repository.ibss.org.ua/dspace/handle/99011/194

Carbon conversion efficiency and population dynamics of a marine algae–bacteria consortium growing on simplified synthetic digestate: First step in a bioprocess coupling algal production and anaerobic digestion
Provedor de dados: 5
Autores: Vasseur, Christophe; Bougaran, Gael; Garnier, Matthieu; Hamelin, Jérôme; Leboulanger, Christophe; Le Chevanton, Myriam; Mostajir, Behzad; Sialve, Bruno; Steyer, Jean-philippe; Fouilland, Eric.
Association of microalgae culture and anaerobic digestion seems a promising technology for sustainable algal biomass and biogas production. The use of digestates for sustaining the growth of microalgae reduces the costs and the environmental impacts associated with the substantial algal nutrient requirements. A natural marine algae–bacteria consortium was selected by growing on a medium containing macro nutrients (ammonia, phosphate and acetate) specific of a digestate, and was submitted to a factorial experimental design with different levels of temperature, light and pH. The microalgal consortium reached a maximum C conversion efficiency (i.e. ratio between carbon content produced and carbon supplied through light photosynthetic C conversion and acetate)...
Tipo: Text
Palavras-chave: Optimization; Nannochloris; Heterotrophic bacteria; Anaerobic digestion; Bioenergy.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19642/17419.pdf

Effect of particulate organic carbon on heterotrophic bacterial populations and nitrification efficiency in biological filters
Provedor de dados: 5
Autores: Michaud, Luigi; Blancheton, Jean-paul; Bruni, V; Piedrahita, Raul.
Competition between heterotrophic and nitrifying bacteria is of major practical importance in aquaculture biofilter design and operation. This competition must be understood to minimize the negative impact of heterotrophic bacteria on an aquaculture system. On the other hand, the heterotrophic population is suspected of having a positive effect against pathogenic bacteria. Little information is available on the bacterial communities present within aquaculture systems, except for nitrifying bacteria, but a combination of traditional aquacultural engineering research methods and novel microbiological techniques offers new opportunities for the study of these communities.   The heterotrophic bacterial population activity and the nitrification efficiency of a...
Tipo: Text
Palavras-chave: Recirculating aquaculture system; Particulate organic matter; Heterotrophic bacteria; Nitrification.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1553.pdf

Release of available nitrogen from river-discharged dissolved organic matter by heterotrophic bacteria associated with the cyanobacterium     Microcystis aeruginosa
Provedor de dados: 5
Autores: Purvina, S; Béchemin, Christian; Balode, M; Verite, Celine; Arnaud, Christophe; Maestrini, Serge Y.
The use of riverine dissolved organic matter by the heterotrophic bacteria associated with a culture of the cyanobacterium Microcystis aeruginosa and release of simple nitrogen compounds were studied in an experimental series. Bacteria reduced the bulk of dissolved organic nitrogen (DON) by half, but when associated with M. aeruginosa, DON was excreted and its concentration rose by 13%. During the stationary growth phase bacteria released ammonium, doubling the concentration of ammonia as well as of nitrates. Bacteria associated with M. aeruginosa consumed riverine DON and joined the ammonification and nitrification process, supplying cyanobacteria with simple nitrogen compounds.
Tipo: Text
Palavras-chave: Microcystis aeruginosa; Heterotrophic bacteria; DOM; DON; Nitrates; Ammonia.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00353/46408/46122.pdf

An experimental study of nanoflagellate bacterivory
Provedor de dados: 59
Autores: Fernandes,Ana Júlia; Mesquita,Hilda de Souza Lima.
Heterotrophic nanoflagellate Pseudobodo tremulans (4.8 to 7.0 µm) and heterotrophic bacteria, isolated from coastal waters in Ubatuba, SP, Brazil, were used in experiments to analyze quantitatively the relationships between bacteria and nanoflagellates. The meaning of these results for the role of heterotrophic nanoflagellates in the Ubatuba coastal ecosystem is discussed.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Nanoflagellate; Heterotrophic bacteria; Coastal ecosystem; Bacterivory.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000400014

Monitoring and spatial distribution of heterotrophic bacteria and fecal coliforms in the Rodrigo de Freitas Lagoon, Rio de Janeiro, Brazil
Provedor de dados: 52
Autores: Lutterbach,Márcia T. S.; Vazquez,Joselito Cabral; Pinet,Jorge A.; Andreata,José V.; Silva,Alexandre Carlos da.
The distribution of heterothrophic bacteria and fecal coliforms was monitored at four sampling stations located near the shore of the Rodrigo de Freitas Lagoon, in the city of Rio de Janeiro, Brazil. Water samples were collected, monthly from October 1994 through September 1998. The highest heterothrophic count (6.5x10 7 CFU/100mL) was recorded at stations 2 and 4 during August 1998 and the lowest (10 ³ CFU/100 mL) at station 3 during February 1995. With respect to fecal coliforms, the highest and lowest counts were 1.6x10 5 coliforms/100mL at station 3 during March 1997 and &lt;1 coliform/100mL at all the stations during February 1995 and September 1997 as well as station 3 during February 1998. The data indicated a percentage increase of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fecal coliforms; Heterotrophic bacteria; Rodrigo de Freitas Lagoon; Monitoring.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000100002

Enumeration of heterotrophic bacteria in water for dialysis: comparison of the efficiency of Reasoner'2 agar and plate count agar
Provedor de dados: 58
Autores: Bugno,Adriana; Almodóvar,Adriana Aparecida Buzzo; Pereira,Tatiana Caldas.
Due to the fact the incubation conditions may influence the microbiological evaluation of water for dialysis, the objective of the present study was the comparison of the efficiency of R2A and PCA media in the enumeration of heterotrophic bacteria in 193 samples of water collected in dialysis clinics from 12 cities in São Paulo, between October and December 2007. Results showed counts significantly greater in R2A, suggesting that enumeration should be carried out in R2A, suggesting that enumeration should be carried out in R2A agar associated with longer incubation times, because of the greater sensitivity.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water for dialysis; Heterotrophic bacteria; Pour plate; Reasoner'2 Agar; Plate Count Agar.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100003

Assessment of the nitrification process in a culture of pacific white shrimp, using artificial substrate and bacterial inoculum in a biofloc technology system (BFT)
Provedor de dados: 65
Autores: Santos,Nathalia Brenda Veiga dos; Furtado,Plínio Schmidt; César,Dionéia Evangelista; Wasielesky Junior,Wilson.
ABSTRACT:  Litopenaeus vannamei is the most cultured marine shrimp in all types of systems including the Bioflocs Technology System (BFT). Bioflocs are formed by microorganisms, among these, autotrophic bacteria are responsible for the nitrification process. This study aimed to identify and promote the development of nitrifying bacteria by adding artificial substrates and biofloc inoculum in L. vannamei culture in a BFT system. The experiment consisted of four treatments with three replics (4x3) as follows: (1) Control: clear water in which bioflocs were formed; (2) IN (10%): clear water with biofloc inoculum (10%); (3) IB: clear water with substrate (immature “bioballs”); and (4) MB: clear water with mature “bioballs” inoculum from a recirculation system....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heterotrophic bacteria; Nitrifying bacteria; “bioballs”; Bioflocs; FISH (Fluorescent in situ Hybridization).
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600651