An analysis of the results of histological and histochemical research on the integumental tissues and the digestive system of nematodes of the suborder Strongylata after the use of anthelmintics

The analysis of the action of various anthelmintics on the integuments and digestive system of Strongylate nematodes indicated that all the used agents caused varying structural disorders. The swelling of the cuticle and its detachment from the subcuticle occurred with the overwhelming majority of the anthelminths on the integuments of the Strongylate nematodes. The digestive system showed an ample epithelial vacuolation in the intestinal wall, as well as swelling and destruction in the mitochondria and endoplasmic reticulum. Almost all the used agent lowered the levels of glycogen and RNA in the tissue of Strongylate nematodes.     

The complement-activating action of modern x-ray contrast agents

The study conducted proved that triombrast (dose dependently) > hexabrics > Ultravist > or = melitrast = omnipac in a concentration interval of 0.03-30.0 mg iodine/ml in vitro and in a dose interval of 0.5-2.0 g iodine/kg in vivo activate the complement system (CS) according to the alternative way in the blood of "sensitive" rats. The degree of CS activation by radiopaque agents (ROA) is significantly determined mathematically by their viscosity and relation of the number of iodine atoms to the number of ions or dissolved particles, and by their hydrophilic (for nonion CS) and osmotic (for ion monomeric CS) properties.     

Microwave Surface Impedance and Complex Conductivity of High-T c Single Crystals: Current State and Unsolved Problems

Common and distinctive features of the temperature dependences of microwave surface impedance Z(T)=R(T)+iX(T) and conductivity σ(T) in the ab-plane and along the c-axis of high-T _c single crystals (HTSC) are discussed. The main attention is focused on an evolution of these dependences in YBaCuO crystal with the oxygen deficiency. Comparison of YBaCuO with other HTSC crystals reveals a number of peculiarities, namely, the linear dependence R_ab(T) ∞ T up to T _c/2 in HTSC single crystals with tetragonal lattice and up to T _c/3 in YBaCuO where R _ab (T) shows also a broad peak at T∼ T_c/2; breakdown of normal skin effect in some HTSC crystals; dramatic effect of pseudogap on the superfluid density in the heavily underdoped YBCO; several orders of magnitude higher residual surface resistance in HTSC when compared to conventional superconductors; etc. Possible explanations are discussed in the context of the specific features of HTSC structure and in the framework of recent models of quasiparticles’ c-transport and pseudogap state in HTSC.     

Effect of alloying with rare elements on the stress-rupture strength and ductility of nickel alloys

Scientific Production Association of the Central Scientific-Research Institute of Machine Building Technology. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 50–54, January, 1990.