The algal flora of five stations from paddy-fields of Golestan Province was investigated between October 2006 and September 2007. Eight filamentous heterocystous Nostocacean are recorded here for the first time from paddy fields of iran: Cylindrospermum licheniforme, Cylindrospermum stangnale, Cylindrospermopsis raciborskii, Calothrix ghosei, Gloeotrichia longiarticulata, Aulosira implexa var. ...

Let F ∈ C[x, y, z] be a constant-degree polynomial, and let A,B,C ⊂ C with |A| = |B| = |C| = n. We show that F vanishes on at most O(n11/6) points of the Cartesian product A×B×C (where the constant of proportionality depends polynomially on the degree of F ), unless F has a special group-related form. This improves a theorem of Elekes and Szabó [2], and generalizes a result of Raz, Sharir, and ...

Hydrodynamic properties of five newly isolated algal extracellular polysaccharides with putative adhesive properties are described, using a combination of size exclusion chromatography, total or ‘multi-angle’ laser light scattering and analytical ultracentrifugation. The respective polysaccharides had been extracted from four filamentous cyanobacteria: Microcoleus vaginatus, Scytonema javanicum...

Abstract The Next-11 (N11) countries have witnessed great advancements in economic activities the past few years. However, simultaneous attainment of environmental sustainability and improved human well-being has remained elusive. This study probes into ecological footprint (EF) nexus N11 by applying advanced estimation techniques compatible with heterogeneity, endogeneity, cross-sectional depe...

Desertification is currently a major concern, and vast regions have already been devastated in the arid zones of many countries. Combined application of cyanobacteria with soil fixing chemicals is a novel method of restoring desertified areas. Three cyanobacteria, Nostoc sp. Vaucher ex Bornet & Flahault, Phormidium sp. Kützing ex Gomont and Scytonema arcangeli Bornet ex Flahault were isolated a...

Çalışmanın amacı, finansal gelişmenin ekonomik karmaşıklık üzerindeki etkisini N11 ülkelerinde 1995-2019 dönemi için panel veri yöntemini kullanarak analiz etmektir. Finansal küreselleşmenin kontrol değişken olarak dahil edildiği çalışmada yatay kesit bağımlılık testi yapılarak modelde bağımlılığı olduğu gözlenmiştir. Sonrasında CADF birim kök uygulanmış, serilerin düzey değerlerinde durağan be...

We report the isolation of organisms belonging to a range of cyanobacterial genera from the remote arid region of central Australia, together with a preliminary characterization of their temporal modes of nitrogen fixation. We rendered unialgal Dermocarpa and Myxosarcina spp. (Section II organisms), LPP group B: type X (Section III), and Scytonema and Nostoc spp. (Section IV). We developed an i...