Results 91 to 100 of about 3,457 (217)

Pengaruh Larutan Belimbing Wuluh (Averrhoa Bilimbi) Dan Larutan Jeruk Nipis (Citrus Aurantifolia) Terhadap Potensial Membran Alga Nitella SP. Yang Tercemar Tembaga (Cu) [PDF]

open access: yes, 2014
Salah satu jenis logam berat yang banyak mencemari perairan saat ini yaitu tembaga (Cu) yang disebabkan oleh limbah hasil pengolahan industri pelapisan logam.
Juswono, U. P. (Unggul)   +2 more
core  

Seasonal variations in phytoplankton community of Manyas Reservoir (Balıkesir, Turkey) in relation to certain physical and chemical variables

open access: yesOceanological and Hydrobiological Studies
This study investigates the seasonal shifts in phytoplankton communities in the Manyas Reservoir (Balıkesir, Turkey) and their relationships with key physicochemical variables. A total of 59 taxa belonging to Heterokontophyta, Chlorophyta, Cyanobacteria,
Çelik Kemal, Karasakal Mahide Balaban
doaj   +1 more source

Precisiones sobre la bioestratigrafía de las Clavatoraceas del Valanginiense de la Sierra del Pozo (Provincia de Jaén, SE de España) [PDF]

open access: yes, 1995
Some Clavatoraceae species have been determinated at the top of the Upper Berriasian-Lower Valanginian depositional sequence. Age determination is highly consistent with dating obtained through Foraminifera studies and formers carried out in the ...
Torres Pérez-Hidalgo, Trinidad José
core   +1 more source

Phytoplankton Communities and Physical-Chemical Properties of Ulaş Lake (Ulaş/Sivas)

open access: yesCumhuriyet Science Journal
This study was conducted between December 2010 and December 2011 to reveal the phytoplanktonic groups present in Ulaş Lake and to assess the lake’s physical and chemical properties.
Ergün Kasaka, Mahir Yildirim
doaj   +1 more source

Ciclo de vida, desarrollo y cariología de Klebsormidium nitens (Klebsormidiales, Charophyta)

open access: yesDarwiniana, 2001
Se estudiaron las células vegetativas y reproductivas de Klebsormidium nitens, primera cita para la República Argentina. La identificación de la especie se realizó utilizando caracteres morfológicos, hábito de crecimiento, la forma de apertura de los ...
María Virginia Sánchez Puerta   +1 more
doaj  

Eocene-Oligocene magnetostratigraphy from the central part of the SE margin of the Ebro Basin [PDF]

open access: yes, 2016
Previous magnetostratigraphic studies focused in the Eocene successions of the eastern Ebro Basin have provided some absolute age for the basin infill. These results were based on some biostratigraphic constraints wich have been recently challenged.
Beamud Amorós, Elisabet   +6 more
core  

Plankton composition and environmental parameters in the habitat of the Iranian cave barb (Iranocypris typhlops) in Iran [PDF]

open access: yes
La composición planctónica y los parámetros ambientales en el hábitat del barbo cavernícola iraní Iranocypris typhlops El barbo cavernícola iraní, Iranocypris typhlops (Bruun & Kaiser, 1944) es una especie catalogada como “Vulnerable” en la Lista Roja ...
Farashi, A.   +4 more
core  

Sexual reproduction of Zygnematophyceae (Charophyta)

open access: yes, 2023
Zygnematophyceae sind eine Klasse im Süßwasser lebender Mikroalgen und die Schwestergruppe aller Landpflanzen. Während sich die meisten Studien mit ihrer Stresstoleranz im vegetativen Zustand beschäftigen, dürfte auch die sexuelle Fortpflanzung (Konjugation) einen wichtigen Aspekt bei der Anpassung an (semi)-terrestrische Lebensräume gespielt haben ...
openaire   +1 more source

Polyploidy in relation to sexual dimorphism in Charophyta.

open access: yesCYTOLOGIA, 1989
Present paper deals with the cytological studies of monoecious and dioecious forms belonging to three Charophyte genera viz. Chara, Nitella and Tolypella. The taxonomic validity of sexual dimorphism has been discussed refuting the generalization of Wood and Imahori (1965).
openaire   +2 more sources

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