On the morphological variability and systematic position of Cyclotella rossii Håkansson (Bacillariophyta)

2019 ◽  
pp. 159-161
Author(s):  
Sergei I. Genkal
Keyword(s):  
Morphological Variability ◽  
Systematic Position ◽  
Published Data

Based on the original and published data, it is suggested to refer Pantocsekiella rossii to the synonymy of Pantocsekiella chantaica and extend the diagnosis of the latter.

Review of the Chinese species of Ducetiini (Orthoptera: Tettigoniidae: Phaneropterinae)

2002 ◽  
Vol 33 (3) ◽  
pp. 337-360 ◽  
Author(s):  
Andrej V. Gorochov ◽  
Keyword(s):  
New Taxa ◽  
Systematic Position ◽  
Junior Synonym ◽  
Published Data ◽  
Identification Keys

AbstractThe Chinese representatives of the tribe Ducetiini are partly revised. The paper includes descriptions of new taxa (Ducetia borealis sp. n., Kuwayamaea inflata sp. n., K. anhuii sp. n., K. fujiani sp. n., K. hunani sp. n., K. brachyptera sp. n., Prohimerta guizhouensis sp. n., P. fujianensis sp. n., P. hubeiensis sp. n., P. sichuanensis sp. n., Shirakisotima furca sp. n., Paraducetia paracruciata gen. & sp. n.) and of the previously unknown female of Sh. brevifissa Wang & Liu, identification keys to genera and species of Chinese Ducetiini for males, notes about systematic position and distribution of the taxa examined [the former genus Anisotima Bey-Bienko is a subgenus of the genus Prohimerta Hebard; Sh. acuminata Wang & Liu is possibly a junior synonym of Sh. multipunctata (Kang & Yang); some published data on distribution of K. sapporensis Matsumura & Shiraki, Prohimerta yunnana (Bey-Bienko), and Paraducetia cruciata (Brunner von Wattenwyl) are probably erroneous].

scholarly journals On morphological variability of some species of pennate (Bacillariophyta) from the reservoirs of the Chernobyl nuclear power plant exclusion zone (Ukraine)

Algologia ◽  
2021 ◽  
Vol 31 (3) ◽  
pp. 205-214
Author(s):  
S.I. Genkal ◽  
◽  
V.I. Shcherbak ◽  
N.Ye. Semenyuk ◽  
◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Morphological Variability ◽  
Central Area ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Chernobyl Nuclear Power Plant ◽  
Published Data ◽  
Exclusion Zone

This scanning electron microscopy study of the morphology of pennate diatoms (Achnanthidium eutrophilum (Lange-Bertalot) Lange-Bertalot, Aneumastis stroesei Mann et Stickle, Gomphonema italicum Kützing, G. pala Reichardt, G. vibrio Ehrenberg, Punctastriata ovalis Williams et Round) from phytoperiphytic communities in the cooling pond of the Chernobyl nuclear power plant and natural lakes of the Exclusion Zone (Glyboke and Daleke lakes) has revealed a higher variability in quantitative characteristics (valve length and width, number of striae in 10 µm). At the same time, no variability of qualitative features (shape of valve, axial and central area, raphe and striae arrangement) has been observed in these species. In A. eutrophilum, the number of striae in 10 µm differ from the published data, in A. stroesei – the valve length, in G. pala, G. vibrio and P. ovalis – the valve length and width. The range of variation in the number of striae in 10 µm in G. pala and the valve length and the number of striae in 10 µm in A. stroesei and G. italicum disagree with the literature data. The first electron micrographs of the inner surface of the valve and the corresponding data on its morphology are obtained for A. eutrophilum, A. stroesei, G. italicum, G. pala and G. vibrio.

The status of the staphylinid genera Derops Sharp and Rimulincola Sanderson (Coleoptera)

1983 ◽  
Vol 14 (3) ◽  
pp. 269-279 ◽  
Author(s):  
A. Smetana
Keyword(s):  
North America ◽  
Distribution Pattern ◽  
Geographical Distribution ◽  
Systematic Position ◽  
Published Data ◽  
Southern Illinois ◽  
The Family ◽  
The Status ◽  
New Tribe ◽  
Nearctic Region

AbstractThe systematic position of the genus Derops Sharp, 1889 (several species in the Palaearctic and Oriental regions) within the family Staphylinidae and its relationship to the genus Rimulincola Sanderson, 1947 (one species in the eastern Nearctic region) are discussed. The genus Derops is shown to be congeneric with Rimulincola, which becomes a junior synonym of Derops. — The genus Derops is removed from the subfamily Phloecharinae and reassigned to the subfamily Tachyporinae as a separate new tribe Deropsini. A key to the tribes of Tachyporinae is given. — Derops kasugaensis (Sawada, 1956) is placed in synonymy with Derops longicornis Sharp, 1889. The published data on the ecology of species of Derops are summarized and detailed ecological observations by the author on D. divalis (southern Illinois) andD. longicornis (Japan, Honshu) are given and compared. The disjunct (eastern and/or midwestern North America-southeastern Asia) type of geographical distribution of Derops is discussed and compared with similar distributions of the syrphid genus Pterallastes Loew (Diptera and some plant genera). This distribution pattern is considered to be unique within the order Coleoptera.

On the morphology and taxonomy of Cyclotella rossii (Bacillariophyta)

2019 ◽  
Vol 53 (2) ◽  
pp. 241-245
Author(s):  
S. I. Genkal
Keyword(s):  
Systematic Position ◽  
Published Data ◽  
Morphological Similarity ◽  
Qualitative Characters

An analysis of published data on Cyclotella rossii and С. chantaica has shown general morphological similarity and coincidence of the majority of quantitative and qualitative characters. They are valve diameter, frequency of marginal fultoportulae and number of satellite pores in them, number of central fultoportulae and number of their satellite pores, number of rimoportulae and valve relief, presence of externally colliculatelly, position of rimoportula and its fissure orientation respectively. Based on this data and priority the name С. chantaica, it is suggested to treat C. rossii as a synonym of С. chantaica and, considering the latest changes in their systematic position, expand the diagnosis of the species Pantocsekiella chantaica (Kuzmina et Genkal) K. T. Kiss, Genkal et Ács emend. Genkal.

Description of Aulolaimus multipapillatus sp. n. and A. nannocephalus Andrássy, 1972 with notes on taxonomy and phylogeny of the genus (Nematoda: Aulolaimidae)

Nematology ◽  
2007 ◽  
Vol 9 (2) ◽  
pp. 201-214 ◽  
Author(s):  
Andrij Susulovsky ◽  
Sven Boström ◽  
Oleksandr Holovachov
Keyword(s):  
Morphological Variability ◽  
Systematic Position ◽  
Electron Microscopic ◽  
Body Side ◽  
Scanning Electron Microscopic ◽  
Two Populations ◽  
Scanning Electron ◽  
Emended Diagnosis

AbstractOne new and one known species of Aulolaimus are described, viz. A. multipapillatus sp. n. from Israel and A. nannocephalus from Ukraine. Aulolaimus multipapillatus sp. n. is particularly characterised by a cuticle bearing ca 60 distinct longitudinal ridges, cuticle with distinct ornamentation on ventral body side anterior and posterior to vulva, 6-11 midventral sensilla anterior to cloaca, and spicules ca 25 μm long. Aulolaimus nannocephalus is redescribed on the base of both light and scanning electron microscopic observations on two populations from Ukraine. An emended diagnosis and a revised classification of the genus are proposed. The morphological variability and systematic position of Aulolaimus are discussed and a key to the species of the genus is provided.

Systematic position of the Paulchoffatiinae (Multituberculata, Mammalia)

1990 ◽  
Vol 64 (6) ◽  
pp. 1051-1054 ◽  
Author(s):  
David W. Krause ◽  
Gerhard Hahn
Keyword(s):  
Late Jurassic ◽  
Complex Structure ◽  
Morphological Variability ◽  
Systematic Position ◽  
The Poor ◽  
The Family ◽  
Lack Of Knowledge

The late Jurassic Paulchoffatiinae, one of two named subfamilies of the family Paulchoffatiidae (suborder Plagiaulacoidea), are generally recognized as the most primitive known, undoubted multituberculates (e.g., Hahn, 1969; Clemens and Kielan-Jaworowska, 1979; Hahn and Hahn, 1983; Hahn et al., 1989). Despite the primitive morphology of members of this subfamily (Paulchoffatia and Pseudobolodon), three features have been posited as autapomorphic for the subfamily (or family), and thus to preclude it from the ancestry of later multituberculates: 1) the distribution of cusps on M2 (Hahn, 1969, 1971); 2) the complex structure of I3 (Hahn, 1969, 1971); and 3) the position of M2 relative to M1 (Van Valen, 1976; Clemens and Kielan-Jaworowska, 1979; Hahn, 1987). Van Valen (1976) argued that the first two features are not unequivocally autapomorphic for paulchoffatiines and that they could, and indeed should, be considered primitive for the order. Hahn (1977) responded to Van Valen's assessment but Clemens and Kielan-Jaworowska (1979, p. 138) opined that “neither argument is particularly compelling” in light of the poor early record of multituberculates and the consequent lack of knowledge concerning morphological variability.

Influence of nascent polypeptide positive charges on translation dynamics

2020 ◽  
Vol 477 (15) ◽  
pp. 2921-2934
Author(s):  
Rodrigo D. Requião ◽  
Géssica C. Barros ◽  
Tatiana Domitrovic ◽  
Fernando L. Palhano
Keyword(s):  
Mrna Decay ◽  
Translation Termination ◽  
Published Data ◽  
Translation Efficiency ◽  
Amino Acid Residues ◽  
High Concentration ◽  
Strong Argument ◽  
Translation Arrest ◽  
Exit Tunnel ◽  
Positively Charged

Protein segments with a high concentration of positively charged amino acid residues are often used in reporter constructs designed to activate ribosomal mRNA/protein decay pathways, such as those involving nonstop mRNA decay (NSD), no-go mRNA decay (NGD) and the ribosome quality control (RQC) complex. It has been proposed that the electrostatic interaction of the positively charged nascent peptide with the negatively charged ribosomal exit tunnel leads to translation arrest. When stalled long enough, the translation process is terminated with the degradation of the transcript and an incomplete protein. Although early experiments made a strong argument for this mechanism, other features associated with positively charged reporters, such as codon bias and mRNA and protein structure, have emerged as potent inducers of ribosome stalling. We carefully reviewed the published data on the protein and mRNA expression of artificial constructs with diverse compositions as assessed in different organisms. We concluded that, although polybasic sequences generally lead to lower translation efficiency, it appears that an aggravating factor, such as a nonoptimal codon composition, is necessary to cause translation termination events.

Metallic prions

2004 ◽  
Vol 71 ◽  
pp. 193-202 ◽  
Author(s):  
David R Brown
Keyword(s):  
Prion Protein ◽  
Binding Capacity ◽  
Normal Function ◽  
Transmissible Spongiform Encephalopathies ◽  
Published Data ◽  
Normal Brain ◽  
Copper Binding ◽  
Loss Of Function ◽  
Spongiform Encephalopathies ◽  
The Brain

Prion diseases, also referred to as transmissible spongiform encephalopathies, are characterized by the deposition of an abnormal isoform of the prion protein in the brain. However, this aggregated, fibrillar, amyloid protein, termed PrPSc, is an altered conformer of a normal brain glycoprotein, PrPc. Understanding the nature of the normal cellular isoform of the prion protein is considered essential to understanding the conversion process that generates PrPSc. To this end much work has focused on elucidation of the normal function and activity of PrPc. Substantial evidence supports the notion that PrPc is a copper-binding protein. In conversion to the abnormal isoform, this Cu-binding activity is lost. Instead, there are some suggestions that the protein might bind other metals such as Mn or Zn. PrPc functions currently under investigation include the possibility that the protein is involved in signal transduction, cell adhesion, Cu transport and resistance to oxidative stress. Of these possibilities, only a role in Cu transport and its action as an antioxidant take into consideration PrPc's Cu-binding capacity. There are also more published data supporting these two functions. There is strong evidence that during the course of prion disease, there is a loss of function of the prion protein. This manifests as a change in metal balance in the brain and other organs and substantial oxidative damage throughout the brain. Thus prions and metals have become tightly linked in the quest to understand the nature of transmissible spongiform encephalopathies.

Accuracy of Four Language Analysis Procedures Performed Automatically

2001 ◽  
Vol 10 (2) ◽  
pp. 180-188 ◽  
Author(s):  
Steven H. Long ◽  
Ron W. Channell
Keyword(s):  
Automatic Identification ◽  
Published Data ◽  
Typically Developing ◽  
Language Impaired ◽  
Productivity Data ◽  
Language Analysis ◽  
Word Classes ◽  
Human Coder ◽  
Impaired Children ◽  
Metalinguistic Skills

Most software for language analysis has relied on an interaction between the metalinguistic skills of a human coder and the calculating ability of the machine to produce reliable results. However, probabilistic parsing algorithms are now capable of highly accurate and completely automatic identification of grammatical word classes. The program Computerized Profiling combines a probabilistic parser with modules customized to produce four clinical grammatical analyses: MLU, LARSP, IPSyn, and DSS. The accuracy of these analyses was assessed on 69 language samples from typically developing, speech-impaired, and language-impaired children, 2 years 6 months to 7 years 10 months. Values obtained with human coding and by the software alone were compared. Results for all four analyses produced automatically were comparable to published data on the manual interrater reliability of these procedures. Clinical decisions based on cutoff scores and productivity data were little affected by the use of automatic rather than human-generated analyses. These findings bode well for future clinical and research use of automatic language analysis software.

Personality of Clown Doctors

2016 ◽  
Vol 37 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Alberto Dionigi
Keyword(s):  
General Population ◽  
Personality Traits ◽  
Big Five ◽  
Normal Population ◽  
Big Five Personality Traits ◽  
Published Data ◽  
Big Five Personality

Abstract. In recent years, both professional and volunteer clowns have become familiar in health settings. The clown represents a peculiar humorist’s character, strictly associated with the performer’s own personality. In this study, the Big Five personality traits (BFI) of 155 Italian clown doctors (130 volunteers and 25 professionals) were compared to published data for the normal population. This study highlighted specific differences between clown doctors and the general population: Clown doctors showed higher agreeableness, conscientiousness, openness, and extraversion, as well as lower neuroticism compared to other people. Moreover, specific differences emerged comparing volunteers and professionals: Professional clowns showed significantly lower in agreeableness compared to their unpaid colleagues. The results are also discussed with reference to previous studies conducted on groups of humorists. Clowns’ personalities showed some peculiarities that can help to explain the facility for their performances in the health setting and that are different than those of other groups of humorists.

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