The present study conducted to epipelic diatoms in the Tigris River within Wasit province for one year from June 2015 May 2016, five sites have been chosen along river between Al-Aziziyah and Kut .The aim of was identify main distributed them data were collected by qualitative quantitative diatoms. A total number 161 species recorded belongs 36 genera, where central 14 belonged 7 genera (8.69%)...

Amphiphilic surfaces, containing both hydrophilic and hydrophobic domains, offer desirable performance for many applications such as marine coatings or anti-icing purposes. This work explores the effect of concentration amphiphilic moieties on converting a polyurethane (PU) system to coating having fouling-release properties. A novel compound is synthesized added at increasing amounts PU system...

Al~tract--By employing the second-order Noether's theorem, several new invariant integrals have been derived for the non-linear shallow shell--the Marguerre-von K~irm~in shell. The dynamic effect is considered in the derivations. These invariant integrals are path-independent over the projection image of the middle surface of the shell in a Cartesian plane, in which the projection area of the m...

Biofilms dominated by pennate diatoms are important in fields as diverse as ship biofouling and marine littoral sediment stabilization. The architecture of a biofilm depends on the fact that much of its mass consists of extracellular polymers. Although most illuminated biofilms in nature are dominated by phototrophs, they also contain heterotrophic bacteria. Given the close spatial association ...

The role of plankton as natural food affects the potential fish in waters. structure community Aneuk Laot Lake can provide an overview stability these This study aims to determine biomass and Sabang. research was conducted September 2019 waters Lake. Determination observation stations using stratified random sampling method, identification census method analysis chlorophyll-a Trichomatic method...