Results 21 to 30 of about 1,203,480 (356)

Characterization of Stream Meanders for Stream Restoration [PDF]

open access: yesJournal of Hydraulic Engineering, 1997
Recently increased emphasis and attention has been given to river management and restoration of modified streams. A variety of restoration techniques and objectives exist, including asymmetrical cross-section construction, point bar development, two-stage channel design, floodplain approaches, pools and riffles re-creation, and sinuosity and meander ...
RINALDI, MASSIMO, Johnson P. A.
openaire   +2 more sources

The Many Streams of the Magellanic Stream [PDF]

open access: yesThe Astrophysical Journal, 2008
AbstractAs a part of the ongoing H i survey by the consortium for Galactic studies with the Arecibo L-band Feed Array (GALFA-HI), we have recently imaged the tip of the MS and found several long filamentary structures. This demonstrates that the northern portion of the MS, which has been interacting with the Galactic halo for a long time, is more ...
Stanimirovic, Snezana   +5 more
openaire   +3 more sources

Valuable habitats of protected areas in southern Poland – a source of rare and poorly known diatom species

open access: yesActa Societatis Botanicorum Poloniae, 2019
The peatbogs and natural upper sections of streams in national parks in southeastern Poland represent unique study areas for research on freshwater diatom diversity.
Teresa Noga
doaj   +1 more source

Stream graphs and link streams for the modeling of interactions over time [PDF]

open access: yesSocial Network Analysis and Mining, 2017
Graph theory provides a language for studying the structure of relations, and it is often used to study interactions over time too. However, it poorly captures the intrinsically temporal and structural nature of interactions, which calls for a dedicated ...
Matthieu Latapy   +2 more
semanticscholar   +1 more source

Development and validation of an alternative method for ergosterol determination in alder leaves using liquid-liquid extraction and LC-MS/MS after saponification

open access: yesMethodsX
Ergosterol is widely used as proxy for the estimation of leaf litter associated fungal biomass. According to a common textbook method, ergosterol can be extracted from plant tissue with methanolic potassium hydroxide followed by purification with solid ...
Björn Kusebauch   +2 more
doaj   +1 more source

Veronico beccabungae-Mimuletum guttati, a new plant community in Slovakia

open access: yesActa Societatis Botanicorum Poloniae, 2018
Vegetation with high coverage by the alien species Mimulus guttatus was studied in the hilly regions of central Slovakia in 2015 and 2016. The floristic composition of these stands was recorded in ten phytosociological relevés corresponding to the ...
Richard Hrivnák   +2 more
doaj   +1 more source

Long term changes in water areas and wetlands in an intensively farmed landscape: A case study from the Czech Republic

open access: yesEuropean Countryside, 2017
Krajina České republiky v současnosti čelí nebezpečí sucha, které je způsobeno mnoha faktory. Mezi ně patří změny krajiny a krajinného pokryvu. V článku jsou sledovány změny vodních a mokřadních ploch a délky vodních toků na podkladě starých vojenských ...
Šantrůčková Markéta   +4 more
doaj   +1 more source

A ocorrência de fluxos no perfil vertical do vento na baixa atmosfera e seu efeito na intensidade do índice "K" The occurrence of streams in the lower-atmosphere vertical wind profile and of their effect to intensity of the "K" index

open access: yesRevista Brasileira de Meteorologia, 2007
Neste estudo objetivou-se caracterizar a influência dos fluxos/Jatos de Nível Baixo (JNB) nos níveis de 850 e 950 hPa com o índice "K". O mecanismo associado aos fluxos/JNB realiza um transporte de calor e vapor de água, aumentando o conteúdo de umidade ...
Cleber Souza Corrêa
doaj   +1 more source

Streaming kidney

open access: yesCell Proliferation, 1991
Abstract. Twenty‐five male young adult random bred rats, weighing 250–300 g, were injected with 18·5 kBq/g body weight tritiated thymidine (specific activity 185 GBq/mM). The rats were then killed in groups of five, at the following times: 1 h and14, 30, 60 and 120 days.
G, Zajicek, N, Arber
openaire   +2 more sources

Influence of land use changes on water chemistry in streams in the State of São Paulo, southeast Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2012
Streamwater is affected by several processes in the watershed including anthropogenic activities that result in changes in water quality as well as in the functioning of these stream ecosystems.
Daniela M.L. Silva   +5 more
doaj   +1 more source

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