Search results for "ISUM"
showing 10 items of 200 documents
Zvaigžņotā Debess: 2009, Pavasaris (203)
2009
Contents: E.R.Mustel, President of the Astronomical Council of the USSR Academy of Sciences. Congratulations to Editorial Board of “Zvaigžņotā debess” ; Z.Alksne. Gould’s Belt ; I.Daube. At the Radioastrophysical Observatory of the Latvian Academy of Sciences ; Z.Alksne, A.Alksnis. Lopsided Galaxies ; A.Alksnis. HII Region Gum 29 – a Stellar Nursery ; D.Docenko. On Collision of Asteroid 2008 TC3 with the Earth ; V.Lapoška. On „Leap Second” ; I.Vilks, M.Gills. Beginning of the International Year of Astronomy in Paris: Impressions by Latvian Delegates ; J.Jaunbergs. Equatorial Ridge on Iapetus ; M.Sudārs. Space Shuttle Is Not Likely to Retire Next Year ; I.Vilks. Planet Satellite Names in Lat…
Ongelmanratkaisun opettaminen todennäköisyystehtävissä
2017
Mitä enemmän oppilas tai opiskelija oivaltaa itse, sitä enemmän hän oppii ja nauttii ongelmanratkaisusta. Tämä ajatus toimii lähtökohtana tutkielmassa. Käsiteltävät tehtävät ovat tasoltaan yläkouluun ja / tai lukioon soveltuvia. Tutkielma antaa opettajalle käytännönläheisiä esimerkkejä opetustilanteessa hyödynnettävistä todennäköisyysongelmista. Tehtävistä esitetään useita ratkaisuvaihtoehtoja, jotta opettajan on helpompi samaistua erilaisiin ajattelutapoihin. Mikä tärkeintä, tutkielmaan on kehitetty kysymyksiä, joilla oppijaa voi ohjata hienovaraisesti eteenpäin ratkaisussaan. Tavoitteena on, että ratkoja keksii kysymysten avulla itse ratkaisun kuhunkin ongelmaan. Ongelmanratkaisutaitojen …
Putative high mobility group non-histone chromosomal proteins from pea (Pisum sativum)
1991
Abstract Three putative HMG proteins, 1P, 2P and 3P have been isolated from pea ( Pisum sativum L. cv. Lincoln) nuclei by extraction with either 5% perchloric acid or 0.35 M NaCl and purified by preparative electrophoresis. The amino acid analysis showed many of the typical features of the HMG proteins, although 1P and 2P possess a somewhat reduced content of acidic amino acids and 3P has less than 20% basic amino acids. Peptide mapping with Staphylococcus aureus V8 protease suggested that none of the proteins are proteolytic products of histone H1.
A proteomic approach to studying plant response to crenate broomrape (Orobanche crenata) in pea (Pisum sativum)
2004
Abstract Crenate broomrape ( Orobanche crenata ) is a parasitic plant that threatens legume production in Mediterranean areas. Pea ( Pisum sativum ) is severely affected, and only moderate levels of genetic resistance have so far been identified. In the present work we selected the most resistant accession available (Ps 624) and compared it with a susceptible (Messire) cultivar. Experiments were performed by using pot and Petri dish bioassays, showing little differences in the percentage of broomrape seed germination induced by both genotypes, but a significant hamper in the number of successfully installed tubercles and their developmental stage in the Ps 624 compared to Messire. The prote…
Sul caso Vos Thalassa. La Cassazione afferma la configurabilità della legittima difesa per i migranti soccorsi in mare che si oppongono con violenza …
2022
La Cassazione pone fine al caso Vos Thalassa. Secondo i giudici di legittimità, è configurabile la causa di giustificazione della legittima difesa in favore di soggetti migranti i quali, dopo essere stati salvati in alto mare da una nave privata italiana, accortisi che l'imbarcazione si dirige verso un paese (la Libia) in cui gli stessi corrono il concreto pericolo di essere sottoposti a trattamenti disumani o degradanti, realizzino condotte di resistenza contro il comandante e alcuni ufficiali dell'imbarcazione, al fine di impedire la loro consegna alle autorità di quel paese. Nelle complesse relazioni fra diritto interno, norme convenzionali, diritto internazionale del mare, diritto dei r…
Symbiotic N2 fixation activity in relation to C economy of Pisum sativum L. as a function of plant phenology
2003
The relationships between symbiotic nitrogen fixation (SNF) activity and C fluxes were investigated in pea plants (Pisum sativum L. cv. Baccara) using simultaneous 13 C and 15 N labelling. Analysis of the dynamics of labelled CO 2 efflux from the nodulated roots allowed the different components associated with SNF activity to be calculated, together with root and nodule synthetic and maintenance processes. The carbon costs for the synthesis of roots and nodules were similar and decreased with time. Carbon lost by turnover, associated with maintenance processes, decreased with time for nodules while it increased in the roots. Nodule turnover remained higher than root turnover until flowering…
A study on 3‐deoxy‐D‐arabino‐heptulosonic Acid 7‐Phospate Synthase in Higher Plants. The existence of three isoenzymes in Pisum sativum
1976
Zvaigžņotā Debess: 2021, Pavasaris (251)
2021
Zvaigžņotā Debess: 2006, Rudens
2006
Latvijas Zinātņu akadēmija, Latvijas Universitāte
Settling Down: The Genome of Serratia symbiotica from the Aphid Cinara tujafilina Zooms in on the Process of Accommodation to a Cooperative Intracell…
2014
Particularly interesting cases of mutualistic endosymbioses come from the establishment of co-obligate associations of more than one species of endosymbiotic bacteria. Throughout symbiotic accommodation from a free-living bacterium, passing through a facultative stage and ending as an obligate intracellular one, the symbiont experiences massive genomic losses and phenotypic adjustments. Here, we scrutinized the changes in the coevolution of Serratia symbiotica and Buchnera aphidicola endosymbionts in aphids, paying particular attention to the transformations undergone by S. symbiotica to become an obligate endosymbiont. Although it is already known that S. symbiotica is facultative in Acyrt…