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metamorphosis, etc ; energy; evolution; geometry; lava; mechanics; Show all 6 Subjects
Abstract:
... Fracture or cracking essentially involves the formation of new interfaces. These patterns are usually studied as two-dimensional mosaics. The new surface that opens up is in the third dimension, along the thickness of the sample. The thickness is usually very small compared to the lateral dimensions of the pattern. A spectacular and distinctive departure from these everyday examples of cracks are ...
metamorphosis, etc ; Miozoa; Scyphozoa; dose response; indomethacin; symbiosis; Show all 6 Subjects
Abstract:
... The upside-down jellyfish Cassiopea has become a model organism for the study of symbiosis between dinoflagellates and cnidarian hosts. Most previous studies have indicated that the presence of symbiotic zooxanthellae is a key requirement for strobilation in Cassiopea. Indole compounds have been shown to induce strobilation in many scyphozoans, including symbiotic Cassiopea xamachana. To determine ...
metamorphosis, etc ; biofilm; chemical ecology; fauna; flora; invertebrates; Show all 6 Subjects
Abstract:
... Microbial-derived cues of marine biofilms induce settlement and metamorphosis of marine organisms, a process responsible for the emergence of diverse flora and fauna in marine habitats. Although this phenomenon is known for more than 80 years, the research field has only recently gained much momentum. Here, we summarize the currently existing biochemical and microbial knowledge about microbial sig ...
metamorphosis, etc ; Drosophila melanogaster; adults; epithelium; integument; mechanics; pupae; Show all 7 Subjects
Abstract:
... The pupae of Drosophila melanogaster are immobile for several days during metamorphosis, during which they develop a new body with a thin transparent adult integument. Their immobility and transparency make them ideal for in vivo live imaging experiments. Many studies have focused on the dorsal epithelial monolayer of the pupal notum because of its accessibility and relatively large size. In addit ...
metamorphosis, etc ; Xenopus; amphibians; larvae; pollution; thyroid hormones; toxicity; Show all 7 Subjects
Abstract:
... Both amphibian metamorphosis assay (AMA) and larval amphibian growth and development assay (LAGDA) can detect thyroid-mediated modality and adversity on the basis of morphological changes during the thyroid hormone-dependent metamorphosis. They are used for identification of thyroid hormone system disrupting chemicals (TDCs) for non-target organisms or the environment. The EU Guidance recommends t ...
metamorphosis, etc ; Panopea; ammonia; ammonium nitrogen; clams; juveniles; larvae; toxicity; Show all 8 Subjects
Abstract:
... The effects of total ammonium nitrogen (TAN) on hatching, metamorphosis and survival of the geoduck clam Panopea japonica in early life stages (larvae and juvenile) were studied. Ammonia had a significant impact on the hatching ratio at different concentrations. The survival ratio of larvae and juveniles was reduced significantly along with increasing TAN concentration. The maximum acceptable toxi ...
metamorphosis, etc ; Bivalvia; ancestry; confocal microscopy; larvae; neurodevelopment; neurogenesis; neurons; serotonin; Show all 9 Subjects
Abstract:
... Understanding aspects of development in animals posessing certain “ancestral” traits can provide key insights into the evolution of various larval forms of invertebrates. Little is presently known concerning the neurodevelopment of Protobranchia, a group of bivalve mollusks. We are first to demonstrate that neurogenesis of the pericalymma larvae of the protobranch Acila insignis differs dramatical ...
metamorphosis, etc ; Crassostrea virginica; fluorescent dyes; larvae; mortality; plankton; research; shellfish; Show all 8 Subjects
Abstract:
... The continued development of effective mark and recapture tools for marine invertebrates is required to better understand fundamental planktonic processes such as larval transport and mortality. Mass chemical marking methods provide researchers with the ability to mark large quantities of individuals at one time with reduced handling stress and costs. Although 3-day-old larvae of Crassostrea virgi ...
metamorphosis, etc ; humans; sustainability science and engineering; Europe; Western European region; Show all 5 Subjects
Abstract:
... This paper explores what it might mean to think about ontological change in our quest for sustainability transformations. To do so, it attempts to paint a picture of the vanished world of esoteric thinking in Western Europe in the fifteenth and sixteenth centuries. The paper pays particular attention to the alchemical tradition of the times and describes key ontological concepts that would derive ...
metamorphosis, etc ; Ixodes persulcatus; Ixodes ricinus; acarology; eggs; forests; taiga; ticks; Show all 8 Subjects
Abstract:
... A critical analysis of the concept of a “thermal constant of development” in acarology is presented. Thermal constants were calculated based on the range of environmental conditions in the optimal distribution areas. The obtained constants of egg development and metamorphosis of larvae and nymphs are given for the taiga tick Ixodes persulcatus Sch., 1930 and the European forest tick I. ricinus L., ...
metamorphosis, etc ; amphibians; hormone receptors; intestinal mucosa; stem cells; thyroid hormones; Show all 6 Subjects
Abstract:
... Several studies emphasized the function of the thyroid hormones in stem cell biology. These hormones act through the nuclear hormone receptor TRs, which are T3-modulated transcription factors. Pioneer work on T3-dependent amphibian metamorphosis showed that the crosstalk between the epithelium and the underlying mesenchyme is absolutely required for intestinal maturation and stem cell emergence. W ...
metamorphosis, etc ; Schistosoma mansoni; electron microscopy; histology; miracidia; parasitology; reproduction; research; ultrastructure; Show all 9 Subjects
Abstract:
... We performed histological and electron microscopic analysis of miracidia of Schistosoma mansoni in order to examine their germinal elements. In total, about 20 germinal cells at different stages of maturation were found. We described their ultrastructure and proposed a scheme of reproduction of mother sporocysts of S. mansoni based on our data and literature information. According to this scheme, ...
metamorphosis, etc ; Morone chrysops x Morone saxatilis; hybrids; juveniles; larval development; purebreds; Show all 6 Subjects
Abstract:
... Aquaculture of hybrid Morone species is preferred over that of purebred strains due to their higher growth rates and resilience to a wide range of rearing conditions. One of the most popular hybrids is the sunshine bass, which is a cross between white bass (M. chrysops) females and striped bass (M. saxatilis) males. Yet, despite their growing economic importance, a detailed description of sunshine ...
metamorphosis, etc ; X-ray diffraction; deformation; density functional theory; equations; physical chemistry; Show all 6 Subjects
Abstract:
... Trirutile NiTa₂O₆ has been studied under high pressure by in situ Raman and angle-dispersive synchrotron X-ray diffraction techniques. It undergoes a new quenchable phase at high pressures above 11.8 GPa accompanied by softening of the internal modes ν₁(A₁g), ν₁(Eg), and ν₆(Eg), and it is denser by 15% compared with its ambient phase. Various Raman-active modes of NiTa₂O₆ diminished at high pressu ...
metamorphosis, etc ; Crassostrea gigas; Crustacea; Vibrio; coasts; fish; pathogens; probiotics; shellfish culture; Show all 9 Subjects
Abstract:
... Oyster larvae reared in hatcheries on the U.S. West coast often experience severe Vibrio coralliilyticus-related mortalities early in their development. Current treatment options for these molluscs are either not available or feasible; however, for decades, probiotics have been successfully used in finfish and crustacean shellfish culture. Consequently, the objectives of this work were to 1) isola ...
metamorphosis, etc ; Plutella xylostella; ecdysis; eclosion; eggs; microscopy; pupal development; video cameras; Show all 8 Subjects
Abstract:
... The molting process of the lepidopteran insects is observed for many species. However, the detailed description of the morphological transformation and behavioral sequence during molting are rarely provided and visualized. Here, we described the molting process of the diamondback moth Plutella xylostella by providing the duration and photographic details of staging criteria of each stage using ste ...
metamorphosis, etc ; Lithobates pipiens; chlorpyrifos; environmental science; life history; optic tectum; technology; Show all 7 Subjects
Abstract:
... Despite regulations and improved design, pesticides remain ubiquitous in the environment at relatively low, trace concentrations. To understand how prolonged exposure to trace pesticide concentrations impacts vertebrate brain development and behavior, we raised larval amphibians (northern leopard frogs, Lithobates pipiens) in 0, 1, or 10 μg/L of the organophosphorus pesticide chlorpyrifos (CPF) fr ...
metamorphosis, etc ; Drosophila melanogaster; bioadhesion; bioadhesives; excretion; genes; glycosylation; models; mucoproteins; predation; Show all 10 Subjects
Abstract:
... The glue produced by Drosophila larvae to attach themselves to a substrate for several days and resist predation until the end of metamorphosis represents an attractive model to develop new adhesives for dry environments. The adhesive properties of this interesting material have been investigated recently, and it was found that it binds as well as strongly adhesive commercial tapes to various type ...
metamorphosis, etc ; Salamandra salamandra; altitude; freshwater; larval development; plasticity; salamanders and newts; Show all 7 Subjects
Abstract:
... Reduced trophic resources can pose relevant constraints to the development of freshwater animals with complex life cycles. For amphibians, food deprived environments, such as high-altitude ponds and springs and groundwaters are frequently used for breeding. The aim of this study is to outline trophic conditions leading to extreme cases of delayed larval development and increased size at metamorpho ...
metamorphosis, etc ; Arabidopsis; Davidia involucrata; abscisic acid; genes; gibberellins; leaves; light intensity; temperature; Show all 9 Subjects
Abstract:
... Bract, or inflorescence leaf, is cryptic in most model plants due to a conserved suppression mechanism. While, bract is present in some ornamental plants and plays an important role in their reproductive growth. The huge and long-standing bract of an ancient species, the dove tree (Davidia), implies the existence of a distinctive pathway of bract development. However, compared to bract suppression ...