126,509 research outputs found
Motions of the SecA protein motor bound to signal peptide: Insights from molecular dynamics simulations
No full textSecA is an essential part of the Sec pathway for protein secretion in bacteria. In this pathway, SecA interacts with the N-terminal fragment of the secretory protein the signal peptide, and couples binding and hydrolysis of adenosine triphosphate with movement of the secretory protein across the SecY protein translocon. How interactions with the signal peptide alter the conformational dynamics and long-distance conformational couplings of SecA is a key open question that we address here with molecular dynamics techniques. Analyses of protein motions indicate that the signal peptide alters SecA dynamics not only at the site where this peptide binds, but also at a nucleotide-binding domain. Hydrogen bond clusters contribute to the long-distance propagation of changes in SecA dynamics
Bondariella mimica Hustache & Bondar 1942
No full textBondariella mimica Hustache & Bondar, 1942 (Figs. 2 A, 3 H–I, 7) Bondariella mimica Hustache & Bondar, 1942: in Bondar 1942: 21; Bondar 1943: 370 (natural history); Vaurie 1953: 26 (lectotype designation); Wibmer & O’Brien 1986: 316 (catalogue). Male (Figs. 2 A, 7). Length of pronotum + elytra: 2.1–2.4mm (N= 10). Integument (Fig. 2 A) dark reddish brown; thorax, head and rostrum reddish black; elytra generally darker on sutural interval and/or with a darker oval spot on basal 1 / 4 of intervals I–IV; covered by large yellowish spatulate scales. Rostrum (Fig. 2 A) 0.9 times as long as pronotum, curved in lateral view. Antennae: antennal insertion premedian (0.4); scape 1.8 times as long as article I of funicle. Pronotum 1.2–1.4 times wider than long; disc with large and closely spaced punctures (distant by 0.5 times their own diameter); scales subequal in length throughout; median line not evident; collar not evident. Interprocoxal distance slightly shorter (0.9 times) than procoxal diameter. Femora and tibae lacking comb of setae. Elytra 1.3–1.4 times longer than wide; 2.2–2.4 times as long as pronotum; sutural interval with two rows of scales; remaining intervals with 2–3 rows of scales on base, becoming variously two rows toward apex. Abdominal tergites (Fig. 7 A): laterotergites subdivided into four smaller sclerites; median fissure complete, reaching distal margin of tergite IV; tergite IV with lateral and median spiculate patches on median sclerites; tergite VII with two rows of plectra, each with seven distantly spaced plectra. Ventrites (Fig. 7 B): I–II combined 2.0– 2.3 times as long as III–IV combined; ventrite I 1.2–1.3 times as long as ventrite II; ventrite V transversally oblong, 3.3–3.5 times wider than long, flat, distal margin rounded, lacking tufts of scales. Sternum VIII (Fig. 7 C): each sclerite semicircular, with six posteroventral setae. Spiculum gastrale (Fig. 7 D) 2.0 times as long as median lobe; stylus curved and moderately wide; furcal arms sclerotized, elongate, narrowed, not clavate, slightly asymmetrical. Tegmen (Fig. 7 E) sclerotized, 1.8 times as long as median lobe; dorsal parameroid lobes free (not connected medially on base), each parameroid lobe 0.6 times as long as median lobe, clothed with long setae on distal 1 / 3; ventral tegminal apodeme 0.8 times as long as median lobe, narrowed, elongate and reflexed dorsally. Aedeagus (Fig. 7 F): median lobe elongate and narrow, 2.5 times longer than wide; apex rounded; lateral margins narrow; sides parallel; endophallus membranous, clothed with sparse spinules, lacking membranous bags of spinules; ostium evident, distal; orificial plates larger, subtriangular. Apodemes of aedeagus 1.7 times as long as median lobe, not sclerotized on basal ¼. Female (Fig. 2 A). Length of pronotum + elytra: 2.2–2.5mm (N= 10). Differs from male by generic characters of the rostrum, scrobe, antennal scape, interocular distance and ventrite II (cited above). In addition, by rostrum (Fig. 2 A) reddish brown, strongly curved; scrobe 0.2 times as long as rostrum; antennal insertion basal (0.1 times); scape shorter than article I of funicle (0.7 times). Body part ratios. Length rostrum/length pronotum: 0.8– 0.9 times; pronotum width/length: 1.4 times; elytron length/width: 1.3–1.5 times; length elytron/length pronotum: 2.2–2.4 times; interprocoxal distance/procoxal diameter: 0.9 times; length ventrite I/length ventrite II: 1.1–1.3 times; length ventrites I+II/length ventrites III+IV: 2.1–2.2 times; ventrite V width/length: 3.0– 3.3 times. Etymology. Named by Bondar (1942) in accordance to the names, Bondariella and Nicentrus mimicus (nomen nudum), suggested by Hustache (see introduction for details). The specific epithet mimica is adjective (feminine singular) from Latin (mimicus) signifying “imitative”. Remarks. Bondariella mimica (Fig. 2 A) is distinguished from other species of Bondariella by the body covered by large yellowish spatulate scales and the integument dark reddish brown, with thorax and head reddish black. Bondariella mimica can be similar to specimens of B. mucugeana with lighter integument but they can be distinguished each other by the characters discussed on remarks of B. mucugeana, besides in B. mimica lacking membranous bags of the spinules in the endophallus (Fig. 7 F) and the elytra have a discrete darker oval basal spot (Fig. 2 A). Finally, B. mimica has only been collected from Syagrus schizophylla while the remaining species of the genus have been collected from different palm species. Natural history. Bondariella mimica is recorded from the Atlantic Forest biome, from Salvador, Bahia, Brazil. As spelled in labels of the specimens, “Bahia, Bahia” means “ Salvador, Bahia”. Adults and larvae were collected on male flowers of Syagrus schizophylla, locally known as “licurioba” (Bondar 1942, 1943, cited as Cocos schizophylla Mart.). Also adults mate, and larvae and adults feed and complete their life cycle between petals of male flowers from open inflorescences of S. schizophylla (Bondar 1942, 1943). Bondar was able to rear larvae of B. mimica in the laboratory, but larvae and pupae have not yet been described. In additional collections besides the type series, Bondariella mimica has only been recorded on flowers of S. schizophylla (for details, see natural history of Bondariella). Material examined. Lectotype male deposited in AMNH: “Bahia, Bahia,\ Brazil 2589 [label 1], Cocos schizophylla [label 2], ♂ [label 3], Gregorio Bondar\ Collection\ David Rockefeller\ Donor [label 4], Lectotype \ Bondariella \ mimica \ Hustache & Bondar\ P. Vaurie [label 5 —rectangular, pink, print]”. Paralectotypes: “Bahia, Bahia\ Brazil [label 1], 2589 [label 2], Cotipo [label 3 —rectangular, red, manuscript], Gregorio Bondar\ Collection\ David Rockefeller\ Donor [label 4]”(AMNH: 9 ♂, 9 ♀); “I–II–II [label 1 —also not legible information, manuscript], Gregorio Bondar\ Collection\ David Rockefeller\ Donor [label 2]” (AMNH: 2 ♂), “Cotipo [label 1 — rectangular, red, print], 1942 \ Bahia\ Salvador \ Bondar [label 2], Bondariella \ mimica Hust. e Bond.,\ cotipo 1942 \ H. Reichardt det. 1962 [label 3]” (MZUSP: 16 ♂ (1 dissected), 5 ♀).Published as part of Valente, Roberta De Melo & Júnior, Mariano Brandão Cordeiro, 2015, Revision of Bondariella Hustache & Bondar (Coleoptera: Curculionidae), with descriptions of the first species from the Amazon and notes on natural history, pp. 201-227 in Zootaxa 4018 (2) on pages 221-222, DOI: 10.11646/zootaxa.4018.2.3, http://zenodo.org/record/24329
Mechanism of conformational coupling in SecA: Key role of hydrogen-bonding networks and water interactions
No full textSecA uses the energy yielded by the binding and hydrolysis of adenosine triphosphate (ATP) to push secretory pre-proteins across the plasma membrane in bacteria. Hydrolysis of ATP occurs at the nucleotide-binding site, which contains the conserved carboxylate groups of the DEAD-box helicases. Although crystal structures provide valuable snapshots of Seth along its reaction cycle, the mechanism that ensures conformational coupling between the nucleotide-binding site and the other domains of Seth remains unclear. The observation that Seth contains numerous hydrogen-bonding groups raises important questions about the role of hydrogen-bonding networks and hydrogen-bond dynamics in long-distance conformational couplings. To address these questions, we explored the molecular dynamics of Seth from three different organisms, with and without bound nucleotide, in water. By computing two-dimensional hydrogen-bonding maps we identify networks of hydrogen bonds that connect the nucleotide-binding site to remote regions of the protein, and sites in the protein that respond to specific perturbations. We find that the nucleotide-binding site of ADP-bound Seth has a preferred geometry whereby the first two carboxylates of the DEAD motif bridge via hydrogen-bonding water. Simulations of a mutant with perturbed ATP hydrolysis highlight the water-bridged geometry as a key structural element of the reaction path. (C) 2015 Published by Elsevier B.V
Une nouvelle variété de Cacaoyer : l'Almeida.
No full textBondar Gregorio. Une nouvelle variété de Cacaoyer : l'Almeida. In: Revue de botanique appliquée et d'agriculture coloniale, 18ᵉ année, bulletin n°197, janvier 1938. pp. 37-39
MISSION IS AS SCIENCE (THE ARTICLE IS DEDICATED TO 90-TH ANNIVERSARY OF THE ACTIVITIES OF ACADEMICIAN N. G. BONDAR)
No full textThe creative life as well as the scientific and pedagogical activities of Academician of the National Academy of Sciences of Ukraine N. G. Bondar are described in the article
Predadores do ácaro verde neotropical da mandioca, Mononychellus, tanajoa (Bondar) (ACari, Prostigmata, Tetranychidae) no Nordeste do Brasil.
No full textEste trabalho relata a ocorrência das sequintes espécies de ácaros da família Phytoseiidae como predadores de Mononychellus tanajoa (Bondar) no Nordeste do Brasil
Nealeurodicus bakeri Bondar, comb. nov.
No full textNealeurodicus bakeri (Bondar) comb. nov. (Figs 34 –35, 116, 131) Radialeurodicus bakeri Bondar, 1923 a: 21 –24. Syntypes, Brazil [probable syntypes examined]. Ceraleurodicus bakeri (Bondar) Costa Lima, 1928: 137 [by inference]. DISTRIBUTION. Neotropical Region — Belize, Brazil, Costa Rica, Nicaragua, Panamá, Trinidad. COMMENTS. Although definite syntypes of this species have not been examined, four puparia on one slide were donated to BMNH by Bondar, and these are probably syntypic. The reason for making this statement is that the date borne on the slide label is “ 7.xii. 1923 ”, exactly the same date as is borne on the labels of a number of other slides donated to BMNH at the same time, and registered in 1924. It is likely that this is not a date of collection, but a date of selection for donation or a date of receipt at BMNH, neither precluding the material being part of Bondar’s original series. This species is distinguished from other species of Nealeurodicus by the presence of small, circular compound pores on the cephalic segment and abdominal segments II, IV and VIII, the pair on segment IV being displaced a little further away from the median line (Fig. 35). The dorsal disc is punctuated by 4 to 5 locular simple pores, but such pores are absent from the median part of abdominal segment VIII between the vasiform orifice and the pockets (Fig. 116); additionally, there is a small cluster of bright pores present on each side of the vasiform orifice, and irregularly distributed minute composite pores (usually 2– 5 within an outer boundary) (Fig. 116). The puparial secretions are robust and may be detached and slidemounted (Fig. 34), but are not obvious to the naked eye (Fig. 131). N. bakeri is represented in BMNH by material from the countries listed above; recorded host plants include palms and several broadleaf families (see Appendix 2), and no clear host preferences are shown.Published as part of John H. Martin, 2004, Whiteflies of Belize (Hemiptera: Aleyrodidae). Part 1 — introduction and account of the subfamily Aleurodicinae Quaintance & Baker, pp. 1-86 in Zootaxa 681 on pages 56-57, DOI: 10.5281/zenodo.15885
Problems of the chidren's traumatism: structure, dynamics of types during the long-time follow-up.
No full textMikhalchuk V. N., Bondar S. O. Problems of the chidren’s traumatism: structure, dynamics of types during the long-time follow-up. Journal of Education, Health and Sport. 2017;7(7):1064-1076. eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.1000978
http://ojs.ukw.edu.pl/index.php/johs/article/view/4964
The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 1223 (26.01.2017).
1223 Journal of Education, Health and Sport eISSN 2391-8306 7
© The Authors 2017;
This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium,
provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License
(http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial
use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 01.07.2017. Revised: 02.07.2017. Accepted: 31.07.2017.
Problems of the chidren’s traumatism: structure, dynamics
of types during the long-time follow-up
V. N. Mikhalchuk, S. O. Bondar
Shupyk National Medical Academy of Postgraduate Education, Kyiv
Muhin Kirovograd Medical College
Summary
There are presented the results of studying the structure of children’s traumatism, dynamics of its variable types during 1999 – 2016 in Ukraine and Kirovogradska Oblast. The peculiarities by the character of changes in indices and their intensity with years were defined.
Key words: structure, level, types of children’s traumatism
Cenotaphs: worship to the soul. Case of the crosses and small chapels. From Ituzaingó (Corrientes) to Posadas (Misiones). National Route N º 12
No full textLa siguiente presentación tiene como objetivo principal proporcionar un primer acercamiento, registro y exploración cualitativa de los cenotafios vigentes a la vera de la Ruta Nacional N 12 en un tramo de 100 km, comprendido entre las localidades de Ituzaingó, Corrientes, y la ciudad de Posadas, Capital de la Pcia. de Misiones. El trabajo de campo se ha realizado durante 2013-2014. Se ha recorrido el tramo señalado implementando el registro en diversos dispositivos tecnológicos, toma de nota de las placas recordatorias y descripción minuciosa de los cenotafios, proponiendo una primera clasificación orientadora que se describirá de forma subsiguiente. El interés por promover estos primeros registros nace de la observancia de que estos cenotafios resultan un recurrente, frecuentemente invisibilizado y en muchos casos destruido al momento de la repavimentación de las rutas y/o caminos vecinales. Por otra parte, y de forma contraria, se percibe una constante actualización de estos espacios de la muerte; la renovación de las flores, paños y la siembra de plantas ornamentales hablan de una continuidad de la memoria y de los vínculos entre los dolientes y el difunto.The following presentation there has as principal aim provide the first approximation, record and qualitative exploration of the in force cenotaphs to the side of the National Route Nº 12 in a section of 100 km understood between Ituzaingó localities, Corrientes and the city of Posadas, The Capital of the Pcia. of Misiones. The fieldwork has been realized during 2013-2014. The notable section has been crossed implementing the record in diverse technological devices, capture of note of the plates follow-ups and meticulous description of the cenotaphs proposing the first classification guidanse that will be described of subsequent form. The interest to promote these first records is born of the observance of these cenotaphs they turn out to be an appellant, frequently not visible and in many cases destroyed to the moment of the repaving of the routes and / or local ways. On the other hand, and of opposite form, there is perceived a constant update of these spaces of the death; the renovation of the flowers, cloths and the sowing of ornamental plants speak about a continuity of the memory and about the links between the mourners and the deceased.Fil: Bondar, César Iván. Universidad Nacional de Misiones. Facultad de Humanidades y Ciencias Sociales. Secretaria de Investigación y Postgrado. Programa de Postgrado en Antropologia Social; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad del Zulia; VenezuelaFil: Olmedo, Tatiana Pamela. Universidad Nacional de Misiones. Facultad de Humanidades y Cs.sociales. Departamento de Antropología Social; Argentin
A New State Record for the Whitefly Aleuroglandulus subtilis Bondar in Hawaii
No full textA whitefly, reported as new to Hawaii during 2006, was tentatively identified as Aleuroglandulus sp. prob. subtilis. A second discovery in 2011 was confirmed as Aleuroglandulus subtilis Bondar (Hemiptera: Aleyrodidae)
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