Pyramimonas robusta sp.nov., a new punctate species, and a reappraisal of the subgenus Punctatae

1997 ◽  
Vol 75 (11) ◽  
pp. 1965-1977 ◽  
Author(s):  
R. N. Pienaar ◽  
S. D. Sym

The ultrastructure of a new punctate species, Pyramimonas robusta, is described and, by comparison with features of Pyramimonas olivacea N. Carter and Pyramimonas mucifera Sym et Pienaar, has allowed for a more defined delimitation to the subgenus Punctatae McFadden. Features, in addition to the obvious character of puncta, which are considered characteristic of this subgenus, include a benthic nature, a chloroplast with a ventral groove coincident with the left and right sinuses, box scales with spines on their side walls, crown scales with eccentric crosses on their base plates, segmented T hairs, limuloid scales with three subsidiary spines and five subsidiary radial ribs, a 3-1 type flagellar apparatus, a basal body with a long region of triplets with longitudinal fibrils separating proximal and distal cartwheel structures, and a 3(2/1):4 or 3:3(2/1):2 microtubular root system. Although as a suite these are characteristic, a great deal of the individual features are shared with other subgenera, specifically subgroup 2 members of the subgenus Trichocystis McFadden but especially members of the subgenus Pyramimonas McFadden. Features originally considered diagnostic that now are questionable include pyrenoid structure and starch investiture and the bilayered nature of the eyespot. Key words: Punctatae, Pyramimonas, Pyramimonas robusta sp. nov., ultrastructure.

Author(s):  
G.F. Оlkhovskyi ◽  
М.А. Bobro ◽  
О.F. Chechui

The most difficult but most informative method of determining the structure of winter wheat yield with the use of large bunches of samples is presented. The role of the stem in the formation of allthe elements of winter wheat yield structure is determined. The advantage of our method is that it allows to get deeper information about the structure of the wheat crop, as it reveals the relationship between the individual elements of the crop structure and shows the amplitude of fluctuations in individual features of thewheat crop structure. Key words: winter wheat, yield structure, stem, weight and number of grains.


Author(s):  
S. Trachtenberg ◽  
D. J. DeRosier

The bacterial cell is propelled through the liquid environment by means of one or more rotating flagella. The bacterial flagellum is composed of a basal body (rotary motor), hook (universal coupler), and filament (propellor). The filament is a rigid helical assembly of only one protein species — flagellin. The filament can adopt different morphologies and change, reversibly, its helical parameters (pitch and hand) as a function of mechanical stress and chemical changes (pH, ionic strength) in the environment.


Xihmai ◽  
2013 ◽  
Vol 5 (10) ◽  
Author(s):  
Jesús Ignacio Panedas Galindo

Resumen Cuando se empezaron a conocer los testimonios de los supervivientes de los campos de exterminio nazis, la humanidad se consternó. El sufrimiento provocado y la aplicación sistemática y consciente de la técnica a la destrucción de la persona, fueron descubrimientos que pusieron en alerta al hombre sobre la naturaleza del hombre mismo.   Tanto fue el horror que se alcanzó a entrever a través de las narraciones que el  tiempo  se  congeló.  El  reclamo  silencioso  de  las  auténticas  ví­ctimas, quienes murieron, se suspendió en el aire de la memoria hasta que los responsables reconocieran sus culpas. El olvido no podí­a abrazar tan profundos crí­menes.   Por este motivo no puede realizarse el fin de la historia. Los sufrimientos del hombre provocados hasta este grado por el mismo hombre fuerzan un pendiente que ya no puede borrarse. El grito de dolor recuerda a las generaciones futuras la necesidad de una reparación, del perdón, del reconocimiento.   Palabras Clave: Testimonio, memoria, campos de exterminio, fenomenologí­a, hermenéutica, sufrimiento, herencia.   Abstract When testimony from the survivors from Nazi extermination fields were first known, the human race filled with dismay. The suffering provoked and the systematic conscious application of the technique of destruction of the individual, were discoveries that alerted the individual on the nature of the individual itself.   Such a horror was seen through the narrations that time froze.     The silent demand from the authentic victims, who died, was suspended on the air of memory until the responsible recognized their  guilt. Obscurity could not hold such deep crimes.   For this reason the end of history cannot be made. The suffering of the individual provoked up to this point by the individual itself, force an unresolved point that cannot be erased.   The scream of pain reminds the future generations the need to repair, forgive and recognize it.   Key words: Testimony, memory, extermination fields, phenomenology, hermeneutics, suffering, inheritance.


2006 ◽  
Vol 32 (1) ◽  
Author(s):  
Marcos Fábio Freire Montysuma

Neste trabalho refletimos sobre a produção e os usos das fontes e dos instrumentos metodológicos que orientam as ações na condução do trabalho do historiador que lida com o que se convencionou chamar História Oral. Buscamos discutir a singularidade do trabalho de campo, envolvendo a relação entre o pesquisador e as pessoas ouvidas, como condição de uma ciência que lida essencialmente com o indivíduo. Abstract In this article we reflect upon the production and uses of sources and methodological tools which guide the actions of the historian who deals with the field conventionally referred to as Oral History. We aim at discussing the singularity of field work, bringing into play the relationship between the researcher and people who are listened to – a vital condition for a science that essentially deals with the individual. Palavras-chave: Fontes. Metodologia. História Oral. Key words: Sources. Methodology. Oral History.


2009 ◽  
pp. 63-78
Author(s):  
Valentina Cosmi ◽  
Luca Pierleoni ◽  
Chiara Simonelli ◽  
Adele Fabrizi

- Sexual and internet addiction represent a rapidly growing phenomenon in the industrialized countries. The union between these clinical diseases has contributed to create new addiction forms, as cybersex addiction and cyber-relational addiction. Despite the poor diagnostic classification on this matter, the scientific debate is high pitched and thought-provoking. The different causes of these phenomenon and their heterogeneity suggest the adoption of different intervention strategies for clinical treatment of subjects with these kind of diseases, to take into account the individual needs and peculiarity.Key words: sexual addiction, internet, cybersex, compulsion, sexual dysfunctions, diagnostic criteria.Parole chiave: dipendenza sessuale, internet, sesso virtuale, compulsione, disfunzioni sessuali, criteri diagnostici.


Author(s):  
Mohamad Kamal A. Rahim

This paper describes four different configurations of active devices integration into log periodic antennas (LPAs). The first configuration involves the integration of a single amplifier at the input feed line of a five element log periodic antenna (LPA). The second configuration involves the integration of an amplifier in the middle of the five elements LPA. The third configuration is the five element LPA with individual amplifiers in each element. The last configuration involves the integration of the individual amplifiers and filters with five element LPA in each element. The performance of these configurations have been investigated and compared in terms of the bandwidth, gain relative to a passive LPA, cross polar isolation and half power beamwidth. Key words: Log periodic antenna, active integrated antenna, microstrip antenna, wideband antenna


2019 ◽  
Vol 18 (1) ◽  
pp. 51-58
Author(s):  
Nirju Ranjit ◽  
Bidur Adhikari ◽  
Rajani Shrestha ◽  
Anusuya Shrestha ◽  
Rosha Bhandari ◽  
...  

Introduction: Palm creases have been studied for a long time and have been recently found to be helpful in tracking underlying medical and genetic conditions. Scientific study and typing of palm prints have been found to be lacking in the Nepalese population Methods: A cross sectional study was done on 252 subjects, 153 male and 99 females, from Kathmandu, Nepal. Subjects were selected by purposive sampling from different age groups. Demographic profile including age, sex, and handedness was collected. Palm print pattern was recorded by digital photography. Each photograph was analysed visually by single observer and pattern of palm crease was noted. Variation of each crease was also noted. Results: On the basis of relation between radial longitudinal crease and proximal transverse crease, 17.3% subjects had open type of palm crease which was significantly more in females while 76.6% subjects had closed type crease which was significantly more in males. Meeting type of palm crease was found in 5.7% of subjects. On the basis of relation between proximal and distal transverse crease, normal crease type was found in 90.1% of subjects, Simian type was found in 7.7% subjects and Sydney type was found in 1.4% of subjects. The concordance of this pattern in left and right palms was found statistically significant. Conclusions: This study presented data from 252 seemingly normal healthy subjects and found that most of them had the normal with no branching, that is normal 1 and closed crease types. Most of the individual major creases were seen to be branched type.  


1983 ◽  
Vol 7 (1) ◽  
pp. 21-42
Author(s):  
Harald Haarmann

SUMMARY Criteria for Ethnic Identity Despite numerous publications on theoretical and methodological issues regarding ethnic identity (ethnicity), many methodological problems relative to this topic remain insufficiently clarified. This article deals particularly with the problems involved in establishing and evaluating criteria of ethnic identity. The author assigns the complex of problems regarding ethnic identity significant status within a theory of the ecology of language. Specific points covered in methodological issues involving the formation of concepts and application of terminology involve: 1. problems of the weighting of distinctive features; 2. problems in the mutual boundary-marking between ethnic groups (i.e., problems of ethnic borders); 3. problems in the changeability of ethnic identity; 4. problems in the correlation of language and ethnicity; 5. problems of the polarity of subjective and objective features of ethnicity; 6. problems of multiple identities and the role of ethnic identity; 7. problems in the historical dimension of ethnic identity; 8. problems in the linking of groups within language communities of the same national identity. In international sociological and sociolinguistic research, unanimity of opinion exists only on the fact that ethnic identity cannot be characterized by a single feature but rather by a series of individual features (the accumulation of features). The priorities to be attached to the individual features are in large measure disputed. The author proceeds from the assumption that ethnic identities in real life are formed through a stronger or weaker dominance of individual features; they should be characterized accordingly. An unacceptable a priori evaluation or weighting of features is thus avoided. In the specific context of a long-term research program on the smaller language communities and ethnic languages of Europe, the author particularly examines the role of language in ethnicity. Contrary to most previous contributions to discussions of this problem area, the author distinguishes between the general linguistic affiliation as a characteristic of ethnic identity on the one hand (cf. the relationship in point 4) and the criterion of language-oriented group formations (cf. relationship in point 8). The problem area of the principle of language community is illustrated using the example of the Transcarpathian Gypsies in the Ukraine. RESUMO Kriterioj de la etna idento Malgraŭ multaj ĝisnunaj eldonajoj pri la etna idento (etneco), multaj metodaj pro-blemoj rilataj al tiu temaro restas nesufice klarigitaj. La jena artikolo aparte traktas la problemaron de la starigo kaj elvalorigo de kriterioj de la etna idento. La autoro al-jugas al la problemaro pri la etna idento gravan rangon interne de teorio pri la lingva ekologio. Apartaj punktoj, traktitaj en metodaraj demandoj, rilataj al la formado de konceptoj kaj la apliko de terminaro, estas: 1. problemaro pri la elvalorigo de karakteraj trajtoj; 2. problemaro de la reciproka limigo inter etnaj grupoj (t.e. problemoj pri etnaj limoj); 3. problemaro pri la šanĝebleco de la etna idento; 4. problemaro pri la rilato inter lingvo kaj etneco; 5. problemaro pri la polusigo de subjektivaj kaj objektivaj trajtoj de etneco; 6. problemaro de pluroblaj identoj kaj la rolo de etna idento; 7. problemaro ce la historia dimensio de la etna idento; 8. problemaro de la formiĝo de grupoj interne de lingvaj komunumoj de la sama nacia idento. En la internacia sociologia kaj socilingvistika esplorado, unuanimeco de opinio ekzistas nur pri la fakto, ke ne eblas karakterizi la etnan identon nur per unusola trajto, sed, male, per aro da opaj trajtoj (la kuniĝo de trajtoj). Oni grandparte disputas pri la prioritato, kiun oni aljuĝu al la opaj trajtoj. La autoro progresas ek de la asumo, ke la etnaj identoj en la vera vivo estas formitaj per, jen pli forta, jen pli malforta, rego de opaj trajtoj; oni karakterizu ilin lau tio. Tiel, oni evitas neakceptindan aprioran elvalorigon au elpezigon de trajtoj. En la aparta kunteksto de longdaura esplorprogramo pri la pli malgrandaj lingvaj komunumoj kaj etnaj lingvoj de Europo, la autoro aparte pristudas la rolon de la lingvo ce la etneco. Kontraue al la plejmultaj ĝisnunaj kontribuoj al diskutoj pri tiu problemaro, la autoro distingas inter la ĝenerala lingva aparteno kiel trajto de la etna idento unuflanke (komparu la rilton ce punkto 4) kaj la kriterion de la formigo de grupoj surbaze de lingvo (komparu la rilaton ce punkto 8). La problemaro de la prin-cipo de la lingva komunumo estas ilustrita per la ekzemplo de la transkarpataj ciganoj en Ukrajnio.


2008 ◽  
Vol 18 ◽  
pp. S583-S584
Author(s):  
M.L. Lovat ◽  
M.A. Vinnikova ◽  
A.V. Kozyreva ◽  
E.A. Kushnir ◽  
E.V. Efimova ◽  
...  

PROTOPLASMA ◽  
1985 ◽  
Vol 127 (1-2) ◽  
pp. 82-92 ◽  
Author(s):  
Francelyne Marano ◽  
Angelica Santa-Maria ◽  
Sushila Krishnawamy

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