In this study marine sponges of inter tidal zone from Hengam Island Persian Gulf were collected by wading at low tides in Eskeleh station at  locations 55˚ 53ʹ 40ʺ E & 26˚ 40ʹ 53ʺ N.For identifying identification of sponge samples, acid digestion method as a method of early detection and microtome section to identify the skeletal structure were used.All the identified sponges were from class De...

This paper provides the first data on myriapods in Truong Sa archipelago (Vietnam). A total of 292 myriapod specimens identified 9 species 7 genera, 6 families, 5 orders two classes Chilopoda and Diplopoda were collected from 10 islands Spratly Khanh Hoa province Vietnam including Southwest Cay (Song Tu Tay), Sand (Son Ca), Namyit island (Nam Yet), Grierson Reef (Sinh Ton Dong), Sin Cowe Ton), ...

Introduction: It is conjectured that the symmetric Hadamard matrices of order 4v exist for all odd integers v>0. In recent years, their existence has been proven many new orders by using a special method known as propus construction. This construction uses difference families Xk (k=1, 2, 3, 4) over cyclic group Zv (integers mod v) with parameters (v; k1, k2, k3, k4; λ) where X1 symmetric, X2...

Abstract Epipactis palustris (L.) Crantz is a protected species in Ukraine. In order to organize optimal protection measures comprehensive studies of various aspects its biology are necessary. The aim this study was determine the pollinators and visitors E. palustris. conducted Kyiv city (Ukraine) between 2020 2022. research focused on arthropod two human-made populations. Specimens 31 families...

As a result of flora-systematic studies the Akdarya reservoir, 71 species and varieties (63 species, 16 variations, 1 form) were identified, which belong to 4 departments, 10 orders, 14 families, 24 genera. The composition is dominated by diatoms (Bacillariophyta), consisting 56 varieties, followed detached green (Cyanophyta) - 9 (8 form), yellowish (Xanthophyta) 4, (Chlorophyta) 2 algae. Hormo...