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1.
A proximal humerus fragment referred to as Azhdarchidae indet. from the Rybushka Formation (Upper Cretaceous, Lower Campanian) of the Beloe Ozero locality in Saratov Region is described. The proximal articular surface is not saddle-shaped, has a weakly convex profile in the frontal section. The most posteriorly projecting part of the proximal articular surface is displaced ventrally. A large pneumatic foramen is located on the anterior surface ventral to the base of deltopectoral crest and close to the proximal articular surface. The humeral head is slightly declined from the diaphysis and only slightly overhangs the diaphysis posteriorly. This proximal humerus fragment possibly belongs to Volgadraco bogolubovi Averianov, Arkhangelsky et Pervushov, 2008, described from the Rybushka Formation of the Shirokii Karamysh 2 locality in Saratov Region. 相似文献
2.
Onishchenko GG Markov VI Merkulov VA Vasil'ev NT Berezhnoĭ AM Androshchuk IA Maksimov VA 《Zhurnal mikrobiologii, epidemiologii, i immunobiologii》2001,(6):7-11
The results of the isolation and identification of the causative agent of a haemorrhagic fever outbreak in the Stavropol Territory are presented. The virus isolated from blood of haemorrhagic fever patients by virological methods was identified in serological and molecular tests as Crimean haemorrhagic fever virus. This epidemiological analysis testify to increased activity of the natural focus of Crimean-Congo haemorrhagic fever in this area due to a number of natural and other factors leading to intensification of its epidemic realization. 相似文献
3.
Grigor'ev IuG Grigor'ev OA Stepanov VS Merkulov AV 《Radiatsionnaia biologiia, radioecologiia / Rossi?skaia akademiia nauk》2001,41(2):195-206
The characteristic of the physical factors of a personal computer at user's working place was presented. The bioeffects of these factors were considered and the influence of these factors on health was estimated. 相似文献
4.
Onishchenko GG Aĭdinov GT Moskvitina EA Lomov IuM Tikhonov NG Prometnoĭ VI Shvager MM Ryzhkov VIu Savchenko PP Dmitrieva TA Batashev VV Pukhov IuM Pichurina NL Ivanova NG Gavrinev SA Kovalev EV Kipaĭkin VA Pauk VL Emel'ianova ZN Orekhov IV Lipkovich AD Stakheev VV Trepel' VG Usatkin AV Markov VI Borisevich IV Merkulov VA Makhlaĭ AA Vasil'ev NT Mishan'kin BN Vodop'ianov SO Mazrukho TV Badunenko VP 《Zhurnal mikrobiologii, epidemiologii, i immunobiologii》2000,(2):36-42
The results of the epidemiological analysis of the outbreak of hemorrhagic fever which was caused by Crimean-Congo hemorrhagic fever virus and occurred during the period of July 3-19, 1999, in the Oblivskaya district of Rostov Province are presented. The specific epidemiological features of the outbreak have been determined. The possible versions of the appearance of the focus of infection and the role of Ixodes ticks in the circulation of the infective agent are discussed. 相似文献
5.
Anatomical Characteristics of Cherry Rootstocks as Possible Preselecting Tools for Prediction of Tree Vigor 总被引:1,自引:0,他引:1
Lana Zori? Mirjana Ljubojevi? Ljiljana Merkulov Jadranka Lukovi? Vladislav Ognjanov 《Journal of Plant Growth Regulation》2012,31(3):320-331
An anatomical study of roots and stems of five self-rooted cherry rootstocks with different growth control potentials was performed to compare their structure and xylem anatomy. The aim was to correlate anatomical parameters with rootstock dwarfing potential and theoretical hydraulic conductance (k h), and to evaluate the potential application of anatomical characteristics in the preselection process for prediction of ultimate tree vigor. One of the mechanisms of water transport efficiency reduction in dwarfing rootstock stems is from the rootstock xylem anatomy. Anatomical parameters of ??Gisela 5?? and ??Mazzard?? were typical for dwarfing and vigorous rootstocks, respectively, and were thus suggested as reference rootstocks. Significantly greater vessel diameter and frequency were found in invigorating and dwarfing rootstocks, respectively. Higher k h was obtained in roots, compared to stems, due to significantly larger vascular elements. Dwarfing rootstocks had lower k h due to small vessel lumens and percentage and, to a lesser extent, because of low wood/cortex ratios or percentage of wood. A higher percentage of wood or xylem in cherry roots and stems was not always positively correlated with their conductivity and vigor. Thus, these parameters cannot be reliably used in prediction of the ultimate vigor, although this method was previously suggested for some other fruit tree species. The most reliable anatomical parameters for that purpose proved to be vessel frequency, vessel lumen area, and percentage of vessels on wood cross section. These characteristics could thus be an effective way to estimate dwarfing capacity and could be applied in rootstock selection and breeding programs. 相似文献
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Pedro LC Pinheiro João CR Cardoso Ana S Gomes Juan Fuentes Deborah M Power Adelino VM Canário 《BMC evolutionary biology》2010,10(1):373
Background
Parathyroid hormone (PTH) and PTH-related peptide (PTHrP) belong to a family of endocrine factors that share a highly conserved N-terminal region (amino acids 1-34) and play key roles in calcium homeostasis, bone formation and skeletal development. Recently, PTH-like peptide (PTH-L) was identified in teleost fish raising questions about the evolution of these proteins. Although PTH and PTHrP have been intensively studied in mammals their function in other vertebrates is poorly documented. Amphibians and birds occupy unique phylogenetic positions, the former at the transition of aquatic to terrestrial life and the latter at the transition to homeothermy. Moreover, both organisms have characteristics indicative of a complex system in calcium regulation. This study investigated PTH family evolution in vertebrates with special emphasis on Xenopus and chicken. 相似文献8.
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