The Caspian (Hyrcanian) lowland forest zone in northern Iran is characterized by small remnant alder forest communities, dominated or subdominated with an Euxino-Hyrcanian element, Alnus glutinosa ssp. barbata. The first floristic inventory of these alder forests in northern Iran is presented. The floristic catalogue is based on the data of 133 phytosociological releves in eight different alder...

We prove that the classification problem for graphs and several types of algebraic lattices (distributive, congruence and modular) up to isomorphism contains the classification problem for pairs of matrices up to simultaneous similarity.

background: providing an appropriate background is essential for necessary changes and innovation in the higher education, the need to review the classification criteria and development of the type of native criteria and local standards which match the cultural and scientific requirements of the country. investigating the possible types of indicators to adjusted accurately and objectively is im...

conclusions moderate ppm has no negative effect on echocardiographic trans-aortic pressure gradients or the patients’ nyha functional status after avr with a carbomedics prosthesis in the mid-term follow up. results of the 66 studied patients, 39 were male and 27 were female. the mean age of the patients was 43 ± 17 with a range of 6 - 76 years. implanted sizes of the carbomedics av prosthesis ...

Background: Providing an appropriate background is essential for necessary changes and innovation in the higher education, the need to review the classification criteria and development of the type of native criteria and local standards which match the cultural and scientific requirements of the country. Investigating the possible types of indicators to adjusted accurately and objectively is im...