Collective Excitations of (154)Sm nucleus at FEL{gamma}+LHC Collider

The production of collective excitations of the (154)Sm at FEL{gamma}+LHC collider is investigated. We show that this machine will be a powerful tool for investigation of high energy level excitations.Comment: 6 pages, 1 figure, 4 table

The Effect of the Pairing Interaction on the Energies of Isobar Analog Resonances in 112−124^{112-124}Sb and Isospin Admixture in 100−124^{100-124}Sn Isotopes

In the present study, the effect of the pairing interaction and the isovector correlation between nucleons on the properties of the isobar analog resonances (IAR) in $^{112-124}$Sb isotopes and the isospin admixture in $^{100-124}$Sn isotopes is investigated within the framework of the quasiparticle random phase approximation (QRPA). The form of the interaction strength parameter is related to the shell model potential by restoring the isotopic invariance of the nuclear part of the total Hamiltonian. In this respect, the isospin admixtures in the $^{100-124}$Sn isotopes are calculated, and the dependence of the differential cross section and the volume integral $J_{F}$ for the Sn($^{3}$He,t)Sb reactions at E($^{3}$He)$=200$ MeV occurring by the excitation of IAR on mass number A is examined. Our results show that the calculated value for the isospin mixing in the $^{100}$Sn isotope is in good agreement with Colo et al.'s estimates $(4-5$, and the obtained values for the volume integral change within the error range of the value reported by Fujiwara et al. (53$\pm$5 MeV fm$^{3}$). Moreover, it is concluded that although the differential cross section of the isobar analog resonance for the ($^{3}$He,t) reactions is not sensitive to pairing correlations between nucleons, a considerable effect on the isospin admixtures in $N\approx Z$ isotopes can be seen with the presence of these correlations.Comment: 16 pages, 5 EPS figures and 2 tables, Late

Errors in chromosome segregation during oogenesis and early embryogenesis

Errors in chromosome segregation occurring during human oogenesis and early embryogenesis are very common. Meiotic chromosome development during oogenesis is subdivided into three distinct phases. The crucial events, including meiotic chromosome pairing and recombination, take place from around 11 weeks until birth. Oogenesis is then arrested until ovulation, when the first meiotic division takes place, with the second meiotic division not completed until after fertilization. It is generally accepted that most aneuploid fetal conditions, such as trisomy 21 Down syndrome, are due to maternal chromosome segregation errors. The underlying reasons are not yet fully understood. It is also clear that superimposed on the maternal meiotic chromosome segregation errors, there are a large number of mitotic errors taking place post-zygotically during the first few cell divisions in the embryo. In this chapter, we summarise current knowledge of errors in chromosome segregation during oogenesis and early embryogenesis, with special reference to the clinical implications for successful assisted reproduction

SNP microarray-based 24 chromosome aneuploidy screening demonstrates that cleavage-stage FISH poorly predicts aneuploidy in embryos that develop to morphologically normal blastocysts

Although selection of chromosomally normal embryos has the potential to improve outcomes for patients undergoing IVF, the clinical impact of aneuploidy screening by fluorescence in situ hybridization (FISH) has been controversial. There are many putative explanations including sampling error due to mosaicism, negative impact of biopsy, a lack of comprehensive chromosome screening, the possibility of embryo self-correction and poor predictive value of the technology itself. Direct analysis of the negative predictive value of FISH-based aneuploidy screening for an embryo's reproductive potential has not been performed. Although previous studies have found that cleavage-stage FISH is poorly predictive of aneuploidy in morphologically normal blastocysts, putative explanations have not been investigated. The present study used a single nucleotide polymorphism (SNP) microarray-based 24 chromosome aneuploidy screening technology to re-evaluate morphologically normal blastocysts that were diagnosed as aneuploid by FISH at the cleavage stage. Mosaicism and preferential segregation of aneuploidy to the trophectoderm (TE) were evaluated by characterization of multiple sections of the blastocyst. SNP microarray technology also provided the first opportunity to evaluate self-correction mechanisms involving extrusion or duplication of aneuploid chromosomes resulting in uniparental disomy (UPD). Of all blastocysts evaluated (n = 50), 58% were euploid in all sections despite an aneuploid FISH result. Aneuploid blastocysts displayed no evidence of preferential segregation of abnormalities to the TE. In addition, extrusion or duplication of aneuploid chromosomes resulting in UPD did not occur. These findings support the conclusion that cleavage-stage FISH technology is poorly predictive of aneuploidy in morphologically normal blastocysts

СРАВНИТЕЛЬНАЯ ХАРАКТЕРИСТИКА ЗАЖИВЛЕНИЯ ХИРУРГИЧЕСКИХ РАН СЛИЗИСТОЙ ОБОЛОЧКИ ПОЛОСТИ РТА И КОЖИ У ДОМАШНИХ СВИНЕЙ. СВЕТООПТИЧЕСКОЕ И ЭЛЕКТРОННО-МИКРОСКОПИЧЕСКОЕ ИССЛЕДОВАНИЕ

Objective: to study the specific features of the structural elements of the hard palate and skin in the healing of incised and sutured wounds at the stage of hemostasis and inflammation in pigs.Materials and methods. Nine piglets weighing 35–40 kg were taken for an experiment. 2.5–3.0-cm rectilinear incisions (surgical wound models) were made in the back skin and hard palate. Three skin biopsy specimens and 3 hard palate mucosal biopsy specimens were taken for morphological examinations in each experimental series (control, 6 hours and 3 and 7 days postsurgery). The electron microscopic material was fixed by an in situ immersion method and then processed by the conventional procedure. Semi- and ultrafine sections were examined under a Latimet light microscope (Leica) and a JEM-1400 electron microscope (JEOL), respectively, at an accelerating voltage of 80–120 kW.Results. A rapid decrement of inflammatory processes in the incised and sutured wounds in the early stages of healing results in delayed cleansing of damaged structures and fibrinoids from the wound surface compared to those in the heard palate mucosa. So formation of mature skin granulation tissue begins on day 7 rather on day 3.Conclusion. The differences in the phases of hemostasis and inflammation affect the further phases of reparative regeneration (proliferation and scar formation), which may lead to a difference in the development of postoperative wound scar tissue. Цель исследования – изучить особенности структурных элементов твердого неба и кожи при заживлении резано-ушитых ран на стадии гемостаза и воспаления у домашних свиней.Материалы и методы. Для эксперимента были взяты 9 поросят с массой тела 35–40 кг. На коже спины и в твердом небе были сделаны прямолинейные разрезы (модели хирургических ран) длиной 2,5–3,0 см. Для проведения морфологических исследований в каждой серии экспериментов (контроль, через 6 ч и на 3-е и 7-е сутки после операции) было взято по 3 биоптата как из кожи, так и из слизистой оболочки твердого неба. Материал для электронной микроскопии фиксировали иммерсией in situ и далее об- рабатывали по общепринятой методике. Полу- и ультратонкие срезы изучали соответственно под световым микроскопом Latimet (Leica) и электронным микроскопом JEM-1400 (JEOL) при ускоряющем напряжении 80–120 кВ.Результаты. Быстрое угасание воспалительных процессов резано-ушитых ран кожи на ранних этапах заживления приводит к задержке очистки поврежденных структур и фибриноидов с раневой поверхности по сравнению с таковыми на слизистой обо- лочке твердого неба. Поэтому формирование созревшей грануляционной ткани на коже начинается не на 3-и, а на 7-е сутки.Выводы. Различия в фазах гемостаза и воспаления отражаются на последующих фазах репаративной регенерации (пролиферации и формирования рубца), что, возможно, и приводит к различию в развитии рубцовой ткани послеоперационных ран.

Cytoplasmic Prep1 Interacts with 4EHP Inhibiting Hoxb4 Translation

embryo development. Interestingly, Prep1 contains a putative binding motif for 4EHP, which may reflect a novel unknown function. development effect. mRNA to the 5′ cap structure. This is the first demonstration that a mammalian homeodomain transcription factor regulates translation, and that this function can be possibly essential for the development of female germ cells and involved in mammalian zygote development