| [the size of non-helical regions in collagen i from the skin of cold-blooded animals]. | the portion of non-spiralized peptide chain in collagen 1 molecules from the skin of cold-blooded animals, such as arenicola marina, gadus morhua marisalbi, eleginus navaga, rana amurensis, rana temporaria, rana semiplicata, rana ridibunda, rana dolmatina, rana graeca, bombina variegata was determined by recombination-kinetic method. it has been shown that the portion of non-spirilized part of collagen i molecule changes in the animals studied from 2 to 11% and correlates with the temperature of ... | 2008 | 2847808 |
| [the data on helminth infestation of the siberian tree frog (rana amurensis boulenger, 1886) in the western boundary of the range]. | helminth species composition and infection rates of the siberian tree frog rana amurensis in western siberia were studied. four species of helminthes--nematodes rhabdias bufonis, oswaldocruzia filiformis, cosmocerca ornata and the trematode haplometra cylindracea were found. prevalence of helminths in the siberian tree frog is 100%, and mean abundance is 27.5 +/- 4.8. helminth species richness in the siberian tree frog in the western periphery of their distribution area is lower than in the cent ... | 2014 | 25272465 |
| components of the peptidome and transcriptome persist in lin wa pi: the dried skin of the heilongjiang brown frog (rana amurensis) as used in traditional chinese medicine. | although the ancient practice of traditional chinese medicine (tcm) utilizes predominantly herbal ingredients, many of which are now the subject of intense scientific scrutiny, significant quantities of animal tissue-derived materials are also employed. here we have used contemporary molecular techniques to study the material known as lin wa pi, the dried skin of the heilongjiang brown frog, rana amurensis, that is used commonly as an ingredient of many medicines, as a general tonic and as a top ... | 2006 | 16790295 |
| distinct specific status of the korean brown frog, rana amurensis coreana (amphibia: ranidae). | we used morphological and genetic data to assess the taxonomic status of rana amurensis coreana and r. a. amurensis. morphological comparisons revealed these two subspecies to be different from each other in size of body, nature of tubercles on dorsal stripe, degree of development in toe webbing, and condition of lateral spots of trunk. they were also different in sequence of mitochondrial 16s rrna gene, with genetic distance as large as those observed among different species of brown frogs. the ... | 2006 | 16603814 |
| [the effects of polylysine on the aggregation of surface and on the cleavage furrow of rana amurensis eggs]. | polylysine synchronously aggregated pigment granules and egg surface stained uniformly with fluorescein isothiocyanate to form patches (plate i, fig 1 & 2). patches always appeared and aggregated first in the opposite grey crescent region, then in grey crescent region and next at animal hemisphere. a fluorescent ring formed at the upper side of the equatorial region. the ring and the patches at the animal hemisphere accumulated to the animal pole to make a cap (plate i, fig. 3). finally the vege ... | 1993 | 8356852 |
| cleavage furrow formation of rana amurensis eggs observed with fluorescence pattern photobleaching. | taking advantage of the extremely slow lateral diffusion of proteins on rana amurensis egg surface (xu et al., 1984), it was possible to make a sharp concentric ring pattern on the egg surface by photobleaching of the fluorescein-labelled egg surface. the shape change of the pattern reveals the movement of the egg surface. the surface, even in front of the furrow tip, is drawn towards the furrow centre. the furrow tip differentiates into border and central lines as shown by the distribution of s ... | 1988 | 3383247 |
| detergent, brij, increasing the area of new surface membrane during the early cleavage of eggs of rana amurensis. | the exposure of new surface membrane occurred in the cleavage furrow of rana amurensis eggs enclosed in fertilization membrane immersed in brij solution. the exposed area increased gradually and reached a maximum while the furrow extended to 240 degrees around the egg surface. at this time, the new membrane area of the treated eggs was significantly larger than that of the control. afterwards, the exposed new membrane area decreased gradually. this may result from the extent of new membrane incr ... | 1986 | 3802217 |
| karyotypes of several frogs from korea, taiwan and the philippines. | rana amurensis coreana, r. plancyi chosenica, r. latouchii, r. narina and ooeidozyga laevis have 2n = 26 chromosomes, r. kuhlii has 2n = 22, and kaloula picta has 2n = 28. males of r. narina have a conspicuous heteromorphic pair, no.8, which might play a rôle in sex-determination. | 1980 | 7398842 |
| diversity of antimicrobial peptides in three partially sympatric frog species in northeast asia and implications for evolution. | antimicrobial peptides (amps) are evolutionarily ancient molecules that play an essential role in innate immunity across taxa from invertebrates to vertebrates. the evolution system of amp system has not been well explained in the literature. in this study, we cloned and sequenced amp transcriptomes of three frog species, namely rana dybowskii, rana amurensis, and pelophylax nigromaculatus, which are partially sympatric in northeast asia, but show different habitat preferences. we found that eac ... | 2020 | 32024145 |
| comparison of the gut microbiota of rana amurensis and rana dybowskii under natural winter fasting conditions. | rana amurensis and r. dybowskii occupy similar habitats. as temperatures decrease with the onset of winter, both species migrate to ponds for hibernation. our goal was to determine whether different species possess different intestinal microbiota under natural winter fasting conditions. we used high-throughput illumina sequencing of 16s rrna gene sequences to analyse the diversity of intestinal microbes in the two species. the dominant gut bacterial phyla in both species were bacteroidetes, prot ... | 2019 | 31778183 |
| metabolic response of the siberian wood frog rana amurensis to extreme hypoxia. | the siberian wood frog rana amurensis is a recently discovered example of extreme hypoxia tolerance that is able to survive several months without oxygen. we studied metabolomic profiles of heart and liver of r. amurensis exposed to 17 days of extreme hypoxia. without oxygen, the studied tissues experience considerable stress with a drastic decrease of atp, phosphocreatine, and nad+ concentrations, and concomitant increase of amp, creatine, and nadh. heart and liver switch to different pathways ... | 2020 | 32884088 |
| the siberian wood frog survives for months underwater without oxygen. | few of the amphibian species that occur in the subarctic and in mountains are adapted to low sub-zero temperatures; most of these species overwinter underwater. it is believed that the distribution of the species that overwinter underwater can be limited by the low oxygen levels in waterbodies covered with ice. we show that the colonisation of the coldest areas of northern asia (to 71°n) by the siberian wood frog (rana amurensis) was facilitated by a unique adaptation, the ability to survive ext ... | 2019 | 30728368 |
| identification of novel amurin-2 variants from the skin secretion of rana amurensis, and the design of cationicity-enhanced analogues. | rana amurensis is important in chinese medicine as its skin secretions contain abundant bioactive peptides. here, we have identified the antimicrobial peptide amurin-2 and three highly-conserved variants, amurin-2a, amurin-2b and amurin-2c through a combination of molecular cloning and ms/ms fragmentation sequencing. synthetic replicates of these peptides demonstrate potent antimicrobial activity against s. aureus, whilst some have activity against c.albicans and even resistant bacterial mrsa. f ... | 2018 | 29366784 |