Abstract:
the tegument of the polyopisthocotylean monogenean atriaster heterodus lebedev & parukhin, 1969 was studied using transmission electron microscopy. the outer syncytial layer of the tegument is connected to the internal cell bodies by cytoplasmic extensions which interweave between the muscular fibres. the free surface of the syncytium has projections of the external membrane which are similar to microvilli. the undulating basal membrane, with numerous narrow elongate projections, is associated with the basal lamina situated between the syncytial and muscular layers. the cell bodies and syncytial layer of the tegument exhibit two types of vesicles, one with fibrous contents and one with electron-dense contents; these were analysed using two cytochemical tests, the e-pta and alcian blue methods, used for the first time on monogeneans.

Abstract:
The tegument of the polyopisthocotylean monogenean Atriaster heterodus Lebedev & Parukhin, 1969 was studied using transmission electron microscopy. The outer syncytial layer of the tegument is connected to the internal cell bodies by cytoplasmic extensions which interweave between the muscular fibres. The free surface of the syncytium has projections of the external membrane which are similar to microvilli. The undulating basal membrane, with numerous narrow elongate projections, is associated with the basal lamina situated between the syncytial and muscular layers. The cell bodies and syncytial layer of the tegument exhibit two types of vesicles, one with fibrous contents and one with electron-dense contents; these were analysed using two cytochemical tests, the E-PTA and alcian blue methods, used for the first time on monogeneans.

Abstract:
An essential generalization of the Lebedev index transform with the square of the Macdonald function is investigated. Namely, we consider a family of integral operators with the positive kernel $|K_{(i\tau+\alpha)/2}(x)|^2, \alpha \ge 0,\ x >0, \ \tau \in \mathbb{R},$ where $K_\mu(z)$ is the Macdonald function and $ i$ is the imaginary unit. Mapping properties such as the boundedness, compactness, invertibility are investigated for these operators and their adjoints in the Lebesgue weighted spaces. Inversion theorems are proved. Important particular cases are exhibited. As an interesting application, a solution of the initial value problem for the second order differential difference equation, involving the Laplacian, is obtained.

Abstract:
We establish the inverse Lebedev expansion with respect to parameters and arguments of the modified Bessel functions for an arbitrary function from Hardy's space H2,A, A>0. This gives another version of the Fourier-integral-type theorem for the Lebedev transform. The result is generalized for a weighted Hardy space H⌢2,A≡H⌢2((−A,A);|Γ(1

Abstract:
In this paper we introduce a radial version of the Kontorovich-Lebedev transform in the unit ball. Mapping properties and an inversion formula are proved in $L_p$

Abstract:
New index transforms, involving the real part of the modified Bessel function of the first kind as the kernel are considered. Mapping properties such as the boundedness and invertibility are investigated for these operators in the Lebesgue spaces. Inversion theorems are proved. As an interesting application, a solution of the initial value problem for the second order partial differential equation, involving the Laplacian, is obtained. It is noted, that the corresponding operators with the imaginary part of the modified Bessel function of the first kind lead to the familiar Kontorovich- Lebedev transform and its inverse.

Abstract:
Ultrastructural changes in Schistosoma mansoni isolated from mice up to 2 weeks after dosing with 50 mg kg1 body weight Ro-354 were investigated. The testicular follicles were completely disorganized. Signs of degeneration of non-germinal cells, vacuolization and swelling of spermatogonia, degeneration of spermatocytes and regression of spermatids were also observed. All stages of spermiogenesis were regressed and developing spermatozoa showed abnormal morphology. As to gastrodermis, a dramatic decrease in the number of surface amplifications (microvilli) was observed. Blebbing, formation of lipid granules, degeneration and prominent flattening of the gastrodermis followed by a general erosion of the tissue to the basal lamina.

Abstract:
In this paper the hero of Dostoevskij's novel "The Idiot", Prince Mys kin, is compared to a more humble character of that book, Luk'jan Lebedev, with special regard to their religious teaching and the Russian notions of "jurodivyj" ("God's fool") and "s ut" ("buffoon"). The paper concludes with the assertion that the Prince concentrates on the bright aspects of religion, while Mr. Lebedev, when provoked, emphasizes its more sinister side.