Датчик угла наклона на основе MEMS-акселерометра

Материалы XVI Междунар. науч.-техн. конф. студентов, аспирантов и молодых ученых, Гомель, 28–29 апр. 2016 г

Rezul'taty mjasnojj produktivnosti pomesejj zubra so skotom otkormljaemykh do vesa tela 450 kg

The respective investigations were carried out at the Experiment Station Popielno, Polish Academy of Sciences on crosses heifer-calves and bull-callves of the genotypes of 50% Hereford, 25% black-and-white, 25% bison (16 heads) as well as 50% Charolais, 25% black-and-white and 25% bison (13 heads). The bull-calves were subjected to the control fattening from the 13th week of life to reaching the weight of 450 kg. It has been proved that cross bull-calves after bison x black-and-white dams with black-and-white x Hereford sires were significantly heavier at birth than their counterparts after Charolais sires. In later periods till the slaughter, no significant differences between both types of crosses in such traits, as body weight gains, carcass dressing, share of basic tissues in sides were found. Thus it may be concluded that both beef breeds can be successfully used for mating with F₁ crosses.Соответствующие исследования проводились в опытной станции Попельно Польской Академии Наук на помесях телках и бычках с генотипом: 50% герефорд, 25% черно-пестрой породы и 25% зубра (16 голов), а такхе 50% шароле, 25% черно-пестрой породы и 25% зубра (13 голов). Бычков подвергали контрольному откорму продолжающемуся с 13-го месяца жизни до достижения веса тела 450 кг. Установлено, что бычки-помеси самок зубра скрещенных с черно-белым скотом х быки породы герефорд имели существенно высшие весы тела при рождении, чем их соответственники после быков породы шароле. В более поздний период до убоя не наблюдались существенные различия между обеими типами помесей в таких признаках, как суточные привесы, убойный выход, участие основных тканей в полутуше. На этом основании можно заключать, что обе мясные породы могут одинакого успешно использоваться для спаривания с помесями FI

Spermatogenesis and sperm morphology of European beaver castor fiber

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Identification of multiple pregnancy-associated glycoproteins (PAGs) purified from the European bison (Eb; Bison bonasus L.) placentas.

peer reviewedThis paper describes the first identified chorionic PAGs in the European bison (Eb), named EbPAGs, predominantly expressed during early and mid-pregnancy (45-120 day post-coitum; dpc). Many EbPAGs were extracted from various cotyledonary tissues, precipitated, chromatographed (DEAE and VVA: Vicia villosa agglutinin), electrophoresed (1D- and 2D-PAGE), analysed by heterologous (cross-species) Western blotting and then micro-sequenced by Edman degradation. Finally, twelve selected VVA-purified isoforms (Ip 3.7-7.4) were entirely characterised. Nine identified NH(2)-terminal micro-sequences were found to be PAGs. On 45dpc, three identified forms were named: EbPAG(67AkDa) (RGSNLTHPLRNIGDLFYVGN), EbPAG(55BkDa) (RGSNLTHPL) and EbPAG(50CkDa) (SQISLRGSNLTI). On 60dpc, the next three forms were named: EbPAG(71DkDa) (RGSNLTIHPLRNIIDLFYVG), EbPAG(55EkDa) (RGSNLTHPLRNI) and EbPAG(50FkDa) (SQISLRGS). On 120dpc, three other forms were named: EbPAG(71GkDa) (RGSNLTHPLRNIRDLFYVG), EbPAG(60HkDa) (RGSNLTTHPLRNIKDLVVYM) and EbPAG(50IkDa) (SGSNLTTV). These EbPAG ((A-I)) sequences are unique, as they are not identical to any other PAGs purified previously in related species of the Bovidae family. However, the EbPAGs (A-I forms) have some sequence resemblance to internal sequences of various full-length polypeptide PAG precursors (in silico translated from cloned cDNAs) identified in domestic cattle. Three other novel native isoforms (J1, J2 and K): EbUPG(45kDa) J1 (SKDNYKNYIPLIVPFAT), EbUPG(45kDa) J2 (SKDNQKNYIPLIVPFAT) and EbUPG(76kDa) K (SPEFTV), were temporarily named 'unknown placental glycoproteins' (UPGs), due to their efficient VVA-purification (specific for glycoproteins only) and a lack of considerable consensus to previously sequenced placental glycoproteins in the Bovidae family. This is the first study identifying NH(2)-terminals of multiple/diverse EbPAGs and some EbUPGs purified from the synepitheliochorial cotyledonary placenta of the endangered Bison bonasus (Red list

Sperm morphology of the Eurasian beaver, Castor fiber: An example of a species of rodent with highly derived and pleiomorphic sperm populations

Published in Journal of Morphology, 2007; 268 (8):683-689 at www.interscience.wiley.comThe structural organization of the spermatozoon from the Eurasian beaver, Castor fiber (Family: Castoridae), was determined and compared to that of other sciuromorph rodents. The beaver spermatozoon has a head, which is variable in form but usually paddle-shaped, with a small nucleus and very large acrosome, and a tail that is relatively short compared to that of most other rodents. Transmission electron microscopy indicates that in most testicular spermatozoa the acrosome projects apically, although in a few it becomes partly flexed. During the final stages of maturation, however, the acrosome becomes highly folded so that the apical segment comes to lie alongside part of the acrosome that occurs lateral to the nucleus, with, in some cases, fusion taking place between the outer acrosomal membranes. The sperm nucleus is wedge-shaped, being broader basally and narrowing apically with an occasional large nuclear vacuole occurring. This spermatozoon structure is markedly different from that found in the other species of Geomyoidea, which is the sister group of the Castoridae. The findings thus emphasize the highly divergent nature of the beaver spermatozoon and demonstrate that, within the proposed Infraorder Castorimorpha, very large differences in sperm structure have evolved.Joanna B. Bierla, Zygmunt Gizejewski, Christopher M. Leigh, Hans Ekwall, Lennart Söderquist, Heriberto Rodriguez-Martinez, Kazimierz Zalewski, and William G. Bree