Search results for "Otus"
showing 10 items of 567 documents
Yhteisen hyvän asialla : Kansanhuoltoa koskeva tiedotustoiminta Yhteishyvän valiokunnassa 1940-1945
2005
Ausainās pūces (Asio otus) gredzenošanas fenoloģija un to ietekmējošie faktori
2021
Klimata pārmaiņas būtiski ietekmējušas putnu, zīdītāju un abinieku fenoloģiju, migrācijas iestāšanās vērtības, kā arī barošanās un ligzdošanas sezonas uzsākas agrāk un ilgst ilgāk. Pētījuma mērķis ir analizēt ausainās pūces (Asio otus) migrēšanas fenoloģiju Latvijā, noteikt migrēšanas sezonas robežas un raksturot migrācijas ietekmējošos faktorus Latvijā. Kā arī izvirzīt priekšlikums par to kādos apstākļos būtu visefektīvāk ķert un gredzenot pūces, balstoties uz Latvijas Gredzenošanas centra ievākto datu masīvu par noķertajām un apgredzenotajām ausainajām pūcem un Latvijas Vides, ģeoloģijas un meteoroloģijas centra arhīva datiem. Rezultātu analīze norāda uz statistiski nebūtisku negatīvu ten…
Hugo Kārļa Grotusa glezna “Viktorijas ūdensroze”
2020
LU Muzeja Botānikas un mikoloģijas kolekcijās glabājas latviešu botāniķim profesoram Paulam Galeniekam (1891 - 1962) piederējusī latviešu mākslinieka Hugo Grotusa glezna (1884 - 1951) ar attēlotu viktorijas ūdensrozi. Raksts veltīts šim artefaktam.
Data from: Not only for egg yolk - functional and evolutionary insights from expression, selection and structural analyses of Formica ant vitellogeni…
2015
Vitellogenin, a storage protein, has been extensively studied for its egg-yolk precursor role, and it has been suggested to be fundamentally involved in caste differences in social insects. More than one vitellogenin copy has been reported in several oviparous species, including ants. However, the number and function of different vitellogenins, their phylogenetic relatedness and their role in reproductive queens and non-reproductive workers has been studied in few species only. We studied caste biased expression of vitellogenins in seven Formica ant species. Only one copy of conventional vitellogenin was identified in Formica species, and three vitellogenin homologues, derived from ancient …
A member of the Tlr family is involved in dsRNA innate immune response in Paracentrotus lividus sea urchin
2015
Abstract The innate immune response involves proteins such as the membrane receptors of the Toll-like family (TLRs), which trigger different intracellular signalling pathways that are dependent on specific stimulating molecules. In sea urchins, TLR proteins are encoded by members of a large multigenic family composed of 60–250 genes in different species. Here, we report a newly identified mRNA sequence encoding a TLR protein (referred to as Pl-Tlr) isolated from Paracentrotus lividus immune cells. The partial protein sequence contained the conserved Toll/IL-1 receptor (TIR) domain, the transmembrane domain and part of the leucine repeats. Phylogenetic analysis of the Pl-Tlr protein was acco…
Inducible galectins are expressed in the inflamed pharynx of the ascidian Ciona intestinalis
2011
Although ascidians belong to a key group in chordate phylogenesis, amino acid sequences of Ciona intestinalis galectin-CRDs (CiLgals-a and -b) have been retained too divergent from vertebrate galectins. In the present paper, to contribute in disclosing Bi-CRD galectin evolution a novel attempt was carried out on CiLgals-a and -b CRDs phylogenetic analysis, and their involvement in ascidian inflammatory responses was shown. CiLgals resulted aligned with Bi-CRD galectins from vertebrates (Xenopus tropicalis, Gallus gallus, Mus musculus, Homo sapiens), cephalochordates (Branchiostoma floridae), echinoderms (Strongylocentrotus purpuratus) and a mono-CRD galectin from the ascidian Clavelina pict…
Sex–biased maternal investment in voles: importance of environmental conditions
2004
Adaptive bias in sex allocation is traditionally proposed to be related to the condition of mothers as well as to the unequal fitness values of produced sexes. A positive relationship between mother condition and investment into male offspring is often predicted. This relationship was also recently found to depend on environmental conditions. We studied these causalities experimentally using a design where winter food supply was manipulated in eight outdoor-enclosed populations of field voles Microtus agrestis. At the beginning of the breeding season in spring, food-supplemented mothers seemed to be in a similar condition, measured as body mass, head width, body condition index and parasite…
Centrifugation does not alter spatial distribution of `BEP4' mRNA in paracentrotus lividus EGG
1997
AbstractParacentrotus lividus unfertilized eggs were centrifuged in a sucrose gradient, so to split each into two parts: a nucleated light fragment and an anucleated heavy fragment. Northern blot analyses utilizing a bep4 probe as animal marker and H2A histone gene and 12S-mit RNA as controls indicate that the eggs are elongated along the animal-vegetal axis during centrifugation and thereafter split into an animal and a vegetal half. Treatment of the eggs with colchicine before centrifugation abolishes the animal localization of bep4 mRNA.
Skrituļslidu komplektēšanas sistēma
2017
Kvalifikācijas darba mērķis ir izstrādāt neatkarīgu sistēmu, ar kuras palīdzību tās lietotājam tiek nodrošināts veids, kā dot informāciju par preču sortimentu skrituļslidu veikalā un iespēju pašam lietotājam nokomplektēt skrituļslidas, balstoties uz detaļu specifikāciju, savienojamību un lietotāja vēlmēm. Sistēma ir paredzēta skrituļslidu veikala apmeklētājiem un darbiniekiem, padarot ērtāku iepirkšanos un atvieglojot veikala darbinieku darbu.