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Search Results: 1 - 10 of 220101 matches for " C. TOMA "
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Recunoasterea si evaluarea activelor biologice si produselor agricole
Toma C
Scientific Annals of the Alexandru Ioan Cuza University of Iasi : Economic Sciences Series , 2005,
Abstract:
ADVENTIVE ROOT STRUCTURE OF SOME DROSERA L. SPECIES
IRINA ST?NESCU,IRINA TOMA,C. TOMA
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2005,
Abstract: Authors underlined few aspects referring to 12 Drosera L. species structure belonging the collection of the ”Alexandru Borza” Botanical Garden of Cluj-Napoca. All the studied species have a primary structure root. The rhizodermis persists or is exfoliated, the exodermis is not organized; the bark consists of several cell rows, ending with a primary or secondary type endodernis. The central cylinder has vascular bundles (xylem and phloem), their number and collocation can be used as an important taxonomic characteristic.
THE STRUCTURE OF VEGETATIVE ORGANS IN VISCUM ALBUM AND LORANTHUS EUROPAEUS
ASPAZIA ANDRONACHE,IRINA TOMA,C. TOMA
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2006,
Abstract: In this paper the results of the histo-anatomical investigations concerning two semiparasitic species from Romanian flora: Viscum album and Loranthus europaeus, are presented. Authors investigated the structure of the vegetative organs of these two species (the leaf, the stem and the haustoria); some commune or different features of the two species are underlined.
HISTO-ANATOMICAL ASPECTS OF SOME LONICERA L. SPECIES
RODICA RUGIN?,C. TOMA
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2007,
Abstract: The authors investigate the structure of 9 Lonicera L. species (L. canadensis Bartr., L. chrysantha Turcz, L. fragrantissima Lindl. et Paxt., L. nigra L., L.x notha Zab., L. pileata Oliv., L. ruprechtiana Rgl., L. tatarica L., L x xylosteoides Tausch.). The stem and the leaf (lamina and petiole) are analyzed, evidencing common and distinctive characteristics which may confirm or infirm the species identity. For example, in the stem is evidenced the epidermic cells shape and periderm structure, the type of vascular tissue, especially of xylemic vessels, the structure of the medullary parenchyma. In the leaf, the structure of the lamina and petiole is focused on epidermic cells shape in front face view, the mesophyll structure and the petiole contour in cross-section.
HISTO-ANATOMICAL ASPECTS REFFERING TO THE VEGETATIVE ORGANS OF TWO SUBSPECIES OF THYMUS PANNONICUS ALL.
IRINA BERCIU,C. TOMA
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2008,
Abstract: The authors analyze comparatively two Thymus pannonicus subspecies (Thymus pannonicus ssp. auctus and Thymus pannonicus ssp. pannonicus). The vegetative organs (root, stem and leaf) of the two studied taxa were histo-anatomically investigated, evidencing the structure, localization and frequency of the secretory structures of essential oils. The secretory structures of essential oils are always multicellular, consisting of a basal cell, a unicellular pedicel and a gland which bears 1, 2 or 8 cells.
Fast Source Routed Connection Setup - Proposal for a RSVP Implementation
F. J. Lataretu,C. Toma
Telfor Journal , 2011,
Abstract: Modern networks are expecting fast and efficient setup procedures for their connections. Strict time limits are requested for signaling in the normal operational mode and also for the recovery/restoration mode. As a possible solution, I proposed a method for fast source routed connection setup that takes advantage of the existing distributed processing potential in order to minimize the dependency of setup time on the path length. Two alternatives for the parallel setup are presented: sequential synchronization in the intermediate nodes and final synchronization in the egress node. The expected time reduction is considerable. The proposal is in general terms, using abstract messages instead of a specific signaling protocol. In the meantime, RSVP is established as the state of the art signaling protocol. The research community is still looking for ways to increase its speed and efficiency. In this context, I'm proposing an implementation of the mentioned method based on the current RSVP standard and I'm comparing it with a recent similar proposal.
RESEARCHES REGARDING THE MORPHOLOGY, STRUCTURE AND DISTRIBUTION OF LATICIFERS IN THE VEGETATIVE ORGANS OF SOME EUPHORBIA SPECIES FROM ROMANIA’S FLORA
RAMONA CRINA GALE?,C. TOMA
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2007,
Abstract: The study deals with the morphology, structure and distribution of laticifers in the vegetative organs of some Euphorbia species from the Romanian flora. Our histo-anatomical researches pointed out the presence of laticifers in all the vegetative organs (root, rhizome, aerial stem, leaf), being well represented in certain parenchymatous tissues and the secondary phloem. In all the analyzed organs, the laticifers of variable size have only primary wall, generally thicker than that of the adjacent cells. In the stem of certain investigated taxa, some laticifers resemble with the secretory ducts, because they are surrounded by two or more concentric layers of meristematic or mechanic cells.
HISTO-ANATOMICAL ASPECTS OF PINGUICULA ALPINA L. AND PINGUICULA MORANENSIS H. B. K. SPECIES
IRINA ST?NESCU,C. TOMA
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2007,
Abstract: In the present paper, the authors evidence the most important histo-anatomical aspects of the vegetative organs of two carnivorous plant species belonging to the Lentibulariaceae family: Pinguicula alpina and P. moranensis. The leaf represents the trap which uses sessile and stalked glands to attract, retain and digest small insects which represent the prey.
THE LEAF STRUCTURE OF SOME NEPENTHES DANSER SPECIES
IRINA ST?NESCU,C. TOMA
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2008,
Abstract: The authors analyze a few aspects referring to the modified leaf of four Nepenthes species, at different levels, stress being laid on the structure of the vascular bundles, digestive and nectariferous glands.
DROSERA CAPENSIS L.: HISTO-ANATOMY OF THE VEGETATIVE ORGANS
IRINA ST?NESCU,C. TOMA
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2009,
Abstract: The investigated species (Drosera capensis L. and three forms: D. capensis L. “Alba”, D. capensis L. “Narrow Leaf” and D. capensis L. “Rubra”) show common characters, regarding the structure of the vascular bundles, the type of stomata, the presence of the secretory trichomes, the homogenous mesophyll. The species present different quantities of a red pigment in the head of the tentacles which makes them attractive for the insects.
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