New species of the genera Pseudallobenedenia Yamaguti, 1966 and Lagenivaginopseudobenedenia Yamaguti, 1966 (Monogenea: Capsalidae) in the Indo-Pacific

Two new capsalid species, Pseudallobenedenia arabica n. sp. from the gills of Pristipomoides filamentosus (Lutjanidae) from the Arabian Sea and Lagenivaginopseudobenedenia tinrowi n. sp. from the gills of Etelis carbunculus (Lutjanidae) from the eastern Pacific Ocean are described and illustrated. P. arabica differs from the most similar species, P. opakapaka Yamaguti, 1966, in the greater width of the body, its larger haptor and anterior adhesive discs, the form and sizes of the testes and ovary, and differences in host and locality. L. tinrowi differs from its congener, L. etelis Yamaguti, 1966, in the larger size of the body and its organs, the absence of eye-spots and Goto's glands, and differences in the arrangement of the genital organs. All of the species in these two genera differ from other capsalids by the presence of a voluminous uterus and an extremely long penis forming a loop. All species in these two genera are parasites of fishes of the family Lutjanidae and are reported from Indo-Pacific subtropical areas.     

Species Composition and Population Dynamics of Dominant Dendrophagous Moths (Lepidoptera) in St. Petersburg and Its Environs

Entomological Review - The paper summarizes new and literature data on the species composition, trophic relationships, and population dynamics of phyllophagous lepidopterans dominant on woody...     

Topography of digestive enzymes in small intestine and activity of corresponding hydrolases in liver and kidney of adult pigs

Distribution of activities of disaccharidases (saccharase, maltase), amino- and dipeptidases, dipeptidyl peptidase IV (DPP) and alkaline phosphatase along the small intestine and of these hydrolases in liver and kidney, as well as distribution of the digestive enzyme activities between the membrane and cytosol fractions of enterocytes is characterized in adult 6-month old pigs. It has been shown that maximum of the studied enzyme activities, except for DPP, takes place in ileum. A higher level of the activities of the soluble form of saccharase, maltase, and aminopeptidase M and a less significant level of the activity of the glycyl-L-leucine dipeptidase soluble form in jejunum and ileum is found than those in rats and monkeys. The obtained data demonstrate the existence of the complex enzyme system in small intestine, liver, and kidney that participate in realization of nutritive and trophic-barrier functions.Translated from Zhurnal Evolyutsionnoi Biokhimii i Fiziologii, Vol. 41, No. 1, 2005, pp. 39–43.Original Russian Text Copyright © 2005 by Smirnova, Gordova, Timofeeva, Shcherbakov.     

Role of catecholaminergic mechanisms in regulating the autogenic periodic motor activity of rat pups

In 1-, 2- to 3-, 7- to 8-, and 10-day old intact and spinal rat puppies, studies have been made of the effect of l-DOPA (100 mg/kg, intraperitoneally) on autogenic periodic motor activity in the gastrocnemius muscle. In 1- to 3-day old pups, strong stimulating effect was observed up to a prolonged continuous activity for 5-10 or even more minutes. This effect decreases with age. Traces of the inhibitory effect are observed at early stages in the form of total decrease of the activity. The inhibitory effect increases with age. In all spinal animals, at the background of a decreased activity, stimulating effect of l-DOPA was predominantly observed. Age peculiarities of the effect of l-DOPA are discussed in relation to ontogenetic development of catecholaminergic innervation in rats. It is suggested that stimulating effect of l-DOPA is associated with its action on the descending noradrenergic system, whereas the inhibitory one is mediated by the brain structures.     

Optical activity of the cellulose acetate-mesophase-generating solvent system in the formation of a lyotropic liquid-crystalline phase

It was demonstrated experimentally that the vapors of a mesophase-generating solvent, i.e., a solvent forming a lyotropic liquid-crystalline phase with a polymer, changed the spatial structure and optical density of natural polysaccharides (cellulose acetates). In this process, the value of specific optical rotation of the polymer modified by the vapors varied in a wide range up to sign inversion. The action of vapors on the polymer follows a peculiar dose-effect pattern, with lower doses producing a stronger effect. Application of this approach to the study into specific structural characteristics of biopolymers, such as DNA, is proposed.     

PET-CT在非完全实性肺结节中的应用价值

肺癌在中国恶性肿瘤的发病率位居第一,随着低剂量薄层CT在肺癌筛查中的广泛应用,临床发现更多表现为非完全实性结节的肺腺癌,目前众多研究使CT影像学特征和肺腺癌病理的关系得到更进一步的认知,虽然CT能对部分非完全实性结节做出定性和定位诊断,但仍有部分非完全实性结节诊断困难,PET-CT结合了病灶的代谢信息和精确的定位信息,从而提高对肺部结节诊断的敏感性、特异性、准确性,综合多个文献PET-CT在非完全实性结节中的诊断分期价值较CT无明显提升,却在评估预后和制定合适手术方案上可以起到一定的作用,本文就PET-CT在SSN中的应用价值进行阐述。     

Alcohol motivation in rats under blockade of protein synthesis by cycloheximide

The influence of protein blocker cycloheximide on the ethanol intake in alcohol-dependent rats was studied. It was found that intracerebroventricular as well as perifornical area hypothalamus injection of cycloheximide caused inhibition of ethanol consumption in alcohol-dependent rats, persisting for 5-9 weeks. The blockade action of cycloheximide was more strong after its injection in phase of decreased ethanol intake. At the same time it was shown an increase in water and food intake. The blockade action of cycloheximide on ethanol intake was not found in alcohol-dependent rats. These data indicate that some protein substances take part in mechanisms of organization of alcohol motivation and dependence.