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1.
Jere Kahanp?? 《ZooKeys》2014,(441):285-290
A species checklist is presented for Finland covering seven smaller families of Opomyzoidea: Anthomyzidae, Asteiidae, Aulacigastridae, Clusiidae, Odiniidae, Opomyzidae and Periscelididae (Diptera). 相似文献
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Ziccardi M Lourenço-De-Oliveira R Lainson R Brígido MC Muniz JA 《Memórias do Instituto Oswaldo Cruz》2000,95(2):157-159
Trypanosome infections were sought in 46 non-human primates captured principally in Amazonian Brazil. Twenty-two (47.8%) were infected with four Trypanosoma species: T. cruzi, T. minasense, T. devei and T. rangeli. These preliminary results confirmed the high prevalence and diversity of natural infections with trypanosomes in primates from Brazilian Amazon and were the first formal record of simian infections with trypanosomes in the State of Acre. The presence of T. cruzi-like and T. rangeli-like parasites are recorded in four new hosts. 相似文献
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Substances studied at this department in 1954–1983 are reviewed; a total of 226 compounds are characterized in a tabular form.
They include natural compounds as well as those prepared by biotransformation, by semisynthetic and synthetic methods. 相似文献
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《Russian Journal of Developmental Biology》2010,41(6):406-418
Reviews
Abstracts of Papers, Conference of Young Scientists, Kol’tsov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia (December 21–22, 2009) 相似文献5.
A total of 41 compounds studied at theDepartment of Biogenesis of Natural Substances between 1984 and 1988 are characterized and tabulated. They include natural, semisynthetic and synthetic compounds.
1st supplement to the paper Podojilet al. (1984). 相似文献
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E. A. Streletskaya 《Contemporary Problems of Ecology》2010,3(4):469-480
The zooplankton composition is studied in the thermokarst, glacial and meteorite lakes, channels, former riverbeds, and hollows
in the basin of Anadyr’. We found 174 taxa: 78, Rotatoria, 55, Cladocera, and 41, Copepoda. The most diverse is the lake fauna:
51 taxa of Rotatoria, 48, Cladocera, and 37, Copepoda. The thermokarst Lake Maiorskoe hosts 68 taxa: 31, Rotatoria, 14, Cladocera,
and 23, Copepoda, wheras the cold ultraoligotrophic Lake El’gygytgyn features only one species of Cyclop of the group scutifer Cyclops neymanae Strel., and Rotatoria and Cladocera are present as allochtonous forms. The Copepoda illustrate the relations of the Anadyr’
fauna with those of Europe, North America, and Japan. 相似文献
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Sperm‐associated and semen‐specific isoforms of α‐L ‐fucosidase are thought to function in fertilization in numerous organisms. Here, we report the localization, distribution, crypticity, and stability of this enzyme in mouse cauda epididymal sperm and cauda fluid. Western analysis revealed that the sperm‐associated α‐L ‐fucosidase is present as two isoforms (Mr ~49 and 56 kDa), whereas the cauda fluid α‐L ‐fucosidase shows a single band at 50 kDa. α‐L ‐Fucosidase activity was detected using the fluorogenic substrate 4‐MU‐FUC. Of the total α‐L ‐fucosidase activity recovered in the cauda epididymal contents, 74% was found in the cell‐free cauda fluid and about 7% was found in sperm cells. During capacitation or permeabilization, cryptic intracellular stores of soluble enzyme were released to the supernatant, while leaving bound enzyme concentrated within the small volume of sperm. Moreover, membrane‐associated enzyme activity was still detectable in acrosome‐reacted cells. Immunofluorescence studies support the presence of α‐L ‐fucosidase (originally localizing at the acrosomal area) at the equatorial segment after the acrosome reaction. α‐L ‐Fucosidase activity of both cauda fluid and sperm at 37°C, 5% CO2 was relatively stable and detectable up to 72 hr. The stability and appearance of mouse sperm‐associated α‐L ‐fucosidase in the equatorial segment after the acrosome reaction suggest that α‐L ‐fucosidase may be involved in sperm–egg interaction. Mol. Reprod. Dev. 79: 208–217, 2012. © 2011 Wiley Periodicals, Inc. 相似文献
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Hiroko Fujita Yaeko Igarashi Stefan Hotes Masayuki Takada Takashi Inoue Masami Kaneko 《Plant Ecology》2009,200(1):9-36
Hokkaido Island is located in the cool temperate zone, and its climate conditions facilitated the formation of a variety of
wetland types, the majority of them peat-forming mires. Most of these remained in a natural state until the early 20th century.
However, drainage and subsequent conversion mostly to agricultural land have since destroyed more than 70% of the original
wetland ecosystems. This paper (1) provides an overview of mire types, (2) reviews the development process of mires in Hokkaido
during the Holocene, (3) analyzes the causes of losses of wetland areas, and (4) gives a summary of the current conservation
and management status. Basic mire types that have been described in other parts of the northern hemisphere can also be recognized
in Hokkaido, although there are floristic differences, and the frequency and intensity of volcanic impact and tsunamis is
higher than in most other regions with abundant mire formation. Mire formation started at various points during the postglacial
period; a few mountain mires in southwest Hokkaido date back to the Lateglacial, but most mountain mires formed during the
mid to late Holocene. Most lowland mires developed at altitudes below 20 m and were influenced by the Jomon transgression
that peaked ca. 6,000 years BP. The largest lowland mires started forming after the sea retreated, and many are not older
than ca. 3,000 years. In 1996, the total number of wetlands (including peat-forming mires, freshwater marshes, and saltmarshes)
greater than 1 ha was 150, with a total area of 59,881 ha. In 1928, when many wetlands were yet undeveloped, their total area
was 200,642 ha. Most losses occurred between the 1950s and 1970s, when post-war development economics promoted agriculture
and large-scale reclamation projects. Currently, 90.7% of mountain wetlands are public land, while 81.3% of the lowland wetlands
are private or in mixed ownership. The ownership condition affects the possibilities for the protection of complete mire complexes
especially in the lowlands. For effective conservation of wetland ecosystems it is necessary to include the catchment area
in the planning of protected areas. 相似文献
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The male of Brumptomyia angelae, sp. nov., a new species of Phlebotominae (Diptera, Psychodidae) of the Atlantic forest of the state of Paraná, Brazil, is described and illustrated. This new taxon is closely related to Brumptomyia ortizi Martins, Silva & Falc?o 1971, Brumptomyia nitzulescui (Costa Lima, 1932), and Brumptomyia troglodytes (Lutz, 1922). The male genitalia of these three latter species have also been drawn. 相似文献
16.
This study examined the influence of the following growth factors and cytokines on early embryonic development: insulin-like growth factors I and II (IGF-I, IGF-II), basic fibroblast growth factor (bFGF), transforming growth factor (TGF-β), granulocyte-macrophage colony-stimulating factor (GM-CSF), and leukemia inhibitory factor (LIF). Synthetic oviduct fluid (SOF) was used as the culture medium. We studied the development of bovine embryos produced in vitro and cultured until Day 9 after fertilization. TGF-β1, bFGF, GM-CSF, and LIF used on their own significantly improved the yield of hatched blastocysts. IGF-I, bFGF, TGF-β1, GM-CSF, and LIF significantly accelerated embryonic development, especially the change from the expanded blastocyst to hatched blastocyst stages. Use of a combination of these growth factors and cytokines (GF-CYK) in SOF medium produced higher percentages of blastocysts and hatched blastocysts than did use of SOF alone (45% and 22% vs. 24% and 12%; P < 0.05) on Day 8 after in vitro fertilization and similar results to use of SOF + 10% fetal calf serum (38% and 16%, at the same stages, respectively). The averages of total cells, inner cell mass cells, and trophectoderm cells of exclusively in vitro Day-8 blastocysts for pooled GF-CYK treatments were higher than those for SOF and similar to those for fetal calf serum. The presence of these growth factors and cytokines in the embryo culture medium therefore has a combined stimulatory action on embryonic development; in particular through an increase in hatching rate and in the number of cells of both the inner cell mass and trophoblast. These results are the first to demonstrate that use of a combination of recombinant growth factors and cytokine, as IGF-I, IGF-II, bFGF, TGF-β1, LIF, and GM-CSF, produces similar results to 10% fetal calf serum for the development of in vitro-produced bovine embryos. This entirely synthetic method of embryo culture has undeniable advantages for the biosecurity of embryo transfer. 相似文献
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Adriana Costa Guimarães Lusânia Maria Greggi Antunes Helem Ferreira Ribeiro Ândrea Kelly Ribeiro dos Santos Plínio Cerqueira dos Santos Cardoso Patrícia Lima de Lima Aline Damasceno Seabra Thaís Brilhante Pontes Claudia Pessoa Manoel Odorico de Moraes Bruno Coelho Cavalcanti Carla Maria Lima Sombra Marcelo de Oliveira Bahia Rommel Rodríguez Burbano 《Cell biology and toxicology》2010,26(5):403-419
Uranium is a natural radioactive metallic element; its effect on the organism is cumulative, and chronic exposure to this element can induce carcinogenesis. Three cities of the Amazon region—Monte Alegre, Prainha, and Alenquer—in North Brazil, are located in one of the largest uranium mineralization areas of the world. Radon is a radioactive gas, part of uranium decay series and readily diffuses through rock. In Monte Alegre, most of the houses are built of rocks removed from the Earth’s crust in the forest, where the uranium reserves lie. The objective of the present work is to determine the presence or absence of genotoxicity and risk of carcinogenesis induced by natural exposure to uranium and radon in the populations of these three cities. The frequency of micronuclei (MN) and chromosomal aberrations (CA) showed no statistically significant differences between the control population and the three study populations (P > 0.05). MN was also analyzed using the fluorescence in situ hybridization (FISH) technique, with a centromere-specific probe. No clastogenic and/or aneugenic effects were found in the populations. Using FISH analysis, other carcinogenesis biomarkers were analyzed, but neither the presence of the IGH/BCL2 translocation nor an amplification of the MYC gene and 22q21 region was detected. Clastogenicity and DNA damage were also not found in the populations analyzed using the alkaline comet assay. The mitotic index showed no cytotoxicity in the analyzed individuals’ lymphocytes. Once we do not have data concerning radiation doses from other sources, such as cosmic rays, potassium, thorium, or anthropogenic sources, it is hard to determine if uranium emissions in this geographic region where our study population lives are too low to cause significant DNA damage. Regardless, genetic analyses suggest that the radiation in our study area is not high enough to induce DNA alterations or to interfere with mitotic apparatus formation. It is also possible that damages caused by radiation doses undergo cellular repair. 相似文献
18.
Hori N Newton RU Andrews WA Kawamori N McGuigan MR Nosaka K 《Journal of strength and conditioning research / National Strength & Conditioning Association》2008,22(2):412-418
The primary purpose of this study was to investigate whether the athlete who has high performance in hang power clean, a common weightlifting exercise, has high performances in sprinting, jumping, and changing of direction (COD). As the secondary purpose, relationships between hang power clean performance, maximum strength, power and performance of jumping, sprinting, and COD also were investigated. Twenty-nine semiprofessional Australian Rules football players (age, height, and body mass [mean +/- SD]: 21.3 +/- 2.7 years, 1.8 +/- 0.1 m, and 83.6 +/- 8.2 kg) were tested for one repetition maximum (1RM) hang power clean, 1RM front squat, power output during countermovement jump with 40-kg barbell and without external load (CMJ), height of CMJ, 20-m sprint time, and 5-5 COD time. The subjects were divided into top and bottom half groups (n = 14 for each group) based on their 1RM hang power clean score relative to body mass, then measures from all other tests were compared with one-way analyses of variance. In addition, Pearson's product moment correlations between measurements were calculated among all subjects (n = 29). The top half group possessed higher maximum strength (P < 0.01), power (P < 0.01), performance of jumping (P < 0.05), and sprinting (P < 0.01). However, there was no significant difference between groups in 5-5 COD time, possibly because of important contributing factors other than strength and power. There were significant correlations between most of, but not all, combinations of performances of hang power clean, jumping, sprinting, COD, maximum strength, and power. Therefore, it seems likely there are underlying strength qualities that are common to the hang power clean, jumping, and sprinting. 相似文献
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John A. Raven 《Plant Ecology & Diversity》2013,6(3):477-485
Summary The life cycle of the Batrachospermales (freshwater florideophyte red such as Batrachospermum, Lemanea) is a shortened variant of the ‘normal’ marine florideophyte life cycle. The perennial Chantransia diploid phase is microscopic and encrusting. Each winter it produces one or more semi-erect haploid gametophytes by vegetative meiosis. Gamete production and fertilization is followed by production of diploid carposporophytes; these produce diploid carpospores which disperse, and regenerate the Chantransia phase. The question of the extent to which the Chantransia phase contributes resources to the gametophyte was approached by physiological-hydrodynamic modelling. These computations suggest that the photosynthetic rates in situ on an area basis are 20 times greater for the gametophyte than the Chantransia phase; this agrees with the observed ratios of peak biomass. The conclusion is that the Chantransia phase has a negligible role in provisioning the growing gametophyte, and that the role of the Chantransia phase is to occupy space with living biomass throughout the year, including exposure at summer drawdown, and (perhaps) by dispersal via production of monospores. A similar conclusion is arrived at on the basis of biomass data for the role of the perennial ‘mushroom’ phase of the semelparous marine Fucalean brown alga Himanthalia elongata in relation to the short-lived but much larger reproductive receptacles. 相似文献