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ultrastructure, etc ; Cassida; aedeagus; polyphyly; taxonomic keys; Show all 5 Subjects
Abstract:
... Aedeagus of the type species of seven subgenera in the genus CassidaLinnaeus, 1758 have been studied and figured. Twenty aedeagal structures of these species of were evaluated in detail under both stereo microscope and Scanning Electron Microscope (SEM).Contrary of popular acceptance, it is demonstrated that the characteristics of the aedeagal structure, which can be obtained with SEM studies espe ...
ultrastructure, etc ; Simulium; adults; palps; sensilla; Thailand; Show all 6 Subjects
Abstract:
... Antennae and maxillary palpi are the most important sensory organs involved in the behaviors of black flies. The ultrastructure of sensilla on these sensory appendages of two human-biting black fly species, Similium nigrogilvum and Simulium umphangense, was studied for the first time. Wild adult females of both species were collected in Umphang District, Tak Province, western Thailand. The morphol ...
ultrastructure, etc ; exine; intine; paleobotany; palynology; spores; sporopollenin; Show all 7 Subjects
Abstract:
... Sporoderm development in Andreaeobryum is studied and confirned to be similar to that in Andreaea in having no lamellate structure in the exine. The formation of the outer layers of the spore wall, external to the intine, proceeds by the accumulation of sporopollenin granules originating within the special wall of the sporocyte. Despite the outermost sublayer having a pattern similar to the perine ...
ultrastructure, etc ; microtubules; new genus; new species; phylogeny; protists; Show all 6 Subjects
Abstract:
... Kinetoplastids represent a stockpile of undiscovered protist diversity. Free-living members of this group have been studied less intensively compared to their important parasitic relatives. We have isolated a new soil-dwelling bacteriotrophic kinetoplastid, which is described here as a new genus and new species, Avlakibodo gracilis gen. et sp. nov. Phylogenetic analysis of 18S rRNA genes showed hi ...
ultrastructure, etc ; Panax; ginsenosides; hippocampus; mice; microRNA; neuroplasticity; pathogenesis; research; Show all 9 Subjects
Abstract:
... Brain-derived neurotrophic factor (BDNF)–tropomyosin-related kinase B (TrkB) plays a critical role in the pathogenesis of depression by modulating synaptic structural remodeling and functional transmission. Previously, we have demonstrated that the ginsenoside Rb1 (Rb1) presents a novel antidepressant-like effect via BDNF–TrkB signaling in the hippocampus of chronic unpredictable mild stress (CUMS ...
ultrastructure, etc ; Arabidopsis; cotton; genes; leaves; secretion; tobacco; transactivators; trichomes; Show all 9 Subjects
Abstract:
... Trichomes exhibit extraordinary diversity in shape, ultrastructure, distribution, secretion capability, biological functions, and morphological differences, which are strongly associated with their multifunction. Previous researches showed MIXTA-like transcription factors involved in regulating trichome initiation and patterning via forming MYB-bHLH-WD40 transcriptional activator complex to induce ...
ultrastructure, etc ; cultural heritage; flax; humans; polysaccharides; Europe; Middle East; Show all 7 Subjects
Abstract:
... Flax fibres have been used by humans for approximately 10,000 years. With time, the geographic area of production and cultivation has changed, as have the applications of flax fibres; from clothing to sails and paintings from antiquity, to automotive, fashion, and design applications in the contemporary era. The degradation process of flax fibres is the same for both ancient and modern objects mad ...
ultrastructure, etc ; cell walls; computer software; flora; magnetism; old and fossil wood; Show all 6 Subjects
Abstract:
... Emma van Nieuwkoop (for friends Emmy) passed away at her home in Oegstgeest on 12 January 2022 at the age of 88. Emma’s role in the IAWA cannot be overestimated. It started in 1977 when the IAWA Office had moved from Syracuse, NY, USA to Leiden, and the IAWA Bulletin had to be produced in-house in the Rijksherbarium, the new hosting institution. Emma, a secretary of the Flora Maelesiana Foundation ...
ultrastructure, etc ; Schistosoma mansoni; electron microscopy; histology; metamorphosis; miracidia; parasitology; reproduction; research; 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, ...
ultrastructure, etc ; biosensors; cell nucleolus; electron microscopy; interphase; manganese; protein synthesis; ribosomes; Show all 8 Subjects
Abstract:
... Nucleolar RNA stored within the interphase nucleus offers a targetable site for processing ribosomal RNAs that can significantly impact the synthesis of cytosolic protein. Nevertheless, information regarding nucleolus ultrastructure is still largely limited to observations from electron microscopy, while its interior information including the correlation between nucleolar RNA and ribosomes remains ...
ultrastructure, etc ; Arge; compound eyes; cornea; light intensity; light microscopy; transmission electron microscopy; Show all 7 Subjects
Abstract:
... External morphology and ultrastructure of the visual system of Arge similis (Vollenhoven, 1860) adults were investigated by light microscopy, scanning electron microscopy, and transmission electron microscopy. Each compound eye contains 2022 ± 89 (mean ± SE) facets in males and 2223 ± 52 facets in females. Arge similis has an apposition kind of compound eye composed of a cornea, a crystalline cone ...
ultrastructure, etc ; Uroglena; Uroglenopsis; algology; ecology; new species; phylogeny; taxonomic keys; taxonomic revisions; Show all 9 Subjects
Abstract:
... Until recently, there was no agreement on species delimitation within the morphologically similar chrysophycean genera Uroglena, Uroglenopsis and Urostipulosphaera. In this study, we aimed at a modern taxonomic revision based on the combination of morphological characters (ultrastructure of cysts, cell and colony features) and a multigene phylogeny (SSU, ITS rDNA and rbcL sequences), with ecology ...
ultrastructure, etc ; Bittacidae; Panorpidae; cornea; cytoplasm; evolution; larvae; ommatidia; photoreceptors; transmission electron microscopy; Show all 10 Subjects
Abstract:
... The fine structure of the larval eyes of the hangingfly Terrobittacus implicatus (Huang & Hua) was investigated using scanning and transmission electron microscopy. The results show that the larval eyes of T. implicatus each consist of seven spaced ommatidia. Each ommatidium is composed of a corneal lens with about 45 lamellae, a tetrapartite eucone type of crystalline cone, eight retinula cells, ...
ultrastructure, etc ; Carya cathayensis; chlorophyll; chloroplasts; photosynthesis; ribulose-bisphosphate carboxylase; specific leaf weight; titanium; Show all 8 Subjects
Abstract:
... Light acts as a key environmental factor for normal growth and development of plants. Carya cathayensis Sarg. (hickory) faces low light conditions, especially those caused by cloudy or rainy days during the rapid growth period, which has caused adverse effects on its growth. In the current investigation, to alleviate the adverse effects of insufficient light on the cultivation of hickory, anti-hyd ...
Alexander G. Ivanov; Marianna Krol; Leonid V. Savitch; Beth Szyszka-Mroz; Jessica Roche; D. P. Sprott; Eva Selstam; Kenneth W. Wilson; Richard Gardiner; Gunnar Öquist; Vaughan M. Hurry; Norman P. A. Hüner
ultrastructure, etc ; Arabidopsis; acclimation; cold; energy; immunoblotting; mutants; phenotype; photochemistry; photosystem II; polypeptides; temperature; thylakoids; Show all 13 Subjects
Abstract:
... MAIN CONCLUSION: Decreased PG constrains PSI activity due to inhibition of transcript and polypeptide abundance of light-harvesting and reaction center polypeptides generating a reversible, yellow phenotype during cold acclimation of pgp1. Cold acclimation of the Arabidopsis pgp1 mutant at 5 °C resulted in a pale-yellow phenotype with abnormal chloroplast ultrastructure compared to its green pheno ...
ultrastructure, etc ; Eucalyptus grandis; X-ray diffraction; cell walls; cellulose microfibrils; models; polarized light microscopy; wood; Show all 8 Subjects
Abstract:
... KEY MESSAGE: X-ray diffraction allows indirect measurement of the microfibril angle (MFA) in green and dry wood, revealing that there are statistical differences between the MFAs of these woods. Wood drying is essential for most wood uses; however, the removal of water from wood can lead to defects. Although it is consolidated that water removal to below the fibers saturation point causes a decrea ...
ultrastructure, etc ; adults; females; glucose; insulin resistance; low protein diet; metabolism; mitochondria; pregnancy; progeny; skeletal muscle; Show all 11 Subjects
Abstract:
... Gestational low-protein (LP) diet leads to glucose intolerance and insulin resistance in adult offspring. We had earlier demonstrated that LP programming affects glucose disposal in females. Mitochondrial health is crucial for normal glucose metabolism in skeletal muscle. In this study, we sought to analyze mitochondrial structure, function, and associated genes in skeletal muscles to explore the ...
ultrastructure, etc ; 2-naphthol; acid treatment; cellulose; enzymatic hydrolysis; hot water treatment; hydrolysis; lignin; phosphoric acid; Show all 9 Subjects
Abstract:
... Lignin is regarded as the primary factor that inhibits enzymatic hydrolysis of cellulose. However, the impact of cellulose ultrastructure on the inhibition of lignin during enzymatic hydrolysis is still unclear. In this work, the addition of lignin during enzymatic hydrolysis of cellulose with different ultrastructure was investigated. Furthermore, the influences of changing cellulose ultrastructu ...
ultrastructure, etc ; Cassida; monophyly; polyphyly; spermatheca; Show all 5 Subjects
Abstract:
... Spermathecae of the type species of six subgenera in the genus CassidaLinnaeus, 1758 have been studied and figured. Spermathecal structures of these species on the base of 24 specified characters were evaluated in detail under both stereo microscope and Scanning Electron Microscope (SEM). It is demonstrated that the characteristics of the spermathecal structure obtained particularly with SEM studi ...
ultrastructure, etc ; Trichogrammatidae; research; sensilla; smell; Show all 5 Subjects
Abstract:
... Extreme miniaturization implies a high degree of optimization, rendering the retention of non-functional organs almost impossible. Two unique non-porous placoid sensilla on the antennae of females of Megaphragma were described in the literature. Placoid sensilla in Hymenoptera have an olfactory function and always bear pores; the apparent absence of pores therefore raises the questions whether suc ...