scholarly journals Geminate Recombination in the Presence of Scavengers: The New Vision of the Old Problem

2011 ◽  
Vol 2011 ◽  
pp. 1-16 ◽  
Author(s):  
S. G. Fedorenko ◽  
A. A. Kipriyanov ◽  
A. B. Doktorov

A geminate reaction between and reactants affected by the bulk reaction between and scavengers is discussed. The exact solution of the problem obtained recently for randomly walking reactant (excess electron) is compared with the superposition approximation commonly used to interpret experimental data. Distinctions related to the important role of time correlations between geminate and bulk reactions are analyzed. The largest deviations exponentially growing in time are observed for geminate reaction rate in the presence of scavengers. It is shown that superposition approximation can decrease essentially the ultimate probability of geminate recombination. The difference is great enough to lead to qualitatively incorrect description of the experiment even at small concentration of scavengers. This, in turn, may give rise to considerable errors in the determination of geminate pair parameters or, alternatively, to the wrong information about bulk kinetics of electron scavenging.

2006 ◽  
Vol 34 (5) ◽  
pp. 601-629 ◽  
Author(s):  
Robin K. Henson

Effect sizes are critical to result interpretation and synthesis across studies. Although statistical significance testing has historically dominated the determination of result importance, modern views emphasize the role of effect sizes and confidence intervals. This article accessibly discusses how to calculate and interpret the effect sizes that counseling psychologists use most frequently. To provide context, the author presents a brief history of statistical significance tests. Second, the author discusses the difference between statistical, practical, and clinical significance. Third, the author reviews and graphically demonstrates two common types of effect sizes, commenting on multivariate and corrected effect sizes. Fourth, the author emphasizes meta-analytic thinking and the potential role of confidence intervals around effect sizes. Finally, the author gives a hypothetical example of how to report and potentially interpret some effect sizes.


2017 ◽  
Vol 12 (6) ◽  
pp. 636-640 ◽  
Author(s):  
Adam Piechna ◽  
Leszek Lombarski ◽  
Bogdan Ciszek ◽  
Krzysztof Cieslicki

Background Intracranial arterial dissections might be attributed to the particular biomechanical properties of their specific layers. Also, knowledge of adventitia properties would be crucial in the context of intracranial balloon angioplasty. Aims The purpose of this work was to determine the rupture pressure of separated adventitia and compare it to intact cerebral arterial segments. Methods Brain specimens were harvested from 14 autopsy subjects (age range from 23 to 86 years). Pressure-inflation tests were conducted on proximal segments of middle cerebral arteries and separated adventitia layers from contralateral arteries to assess the rupture pressure values. Results The averaged rupture pressure of adventitia layers was 1.41 SD 0.25 atm (1072 SD 190 mmHg), whereas for intact arterial segments it was 2.32 SD 0.70 atm (1763 SD 532 mmHg) and diminished with age according to nonlinear regression trends. The difference beetween the aformentioned rupture pressures was positively correlated with rupture pressure of intact arterial segments ( R2 = 0.88; p < 0.001). Conclusions The obtained experimental results indicate a leading role of adventitia in building arterial strength under supraphysiological pressure conditions. The greater the rupture pressure of complete cerebral arteries, the smaller the contribution of adventitia in overall wall resistance.


2016 ◽  
Author(s):  
Imadol V Jeff-Eke

We present a rationale and proposed approach to the modification and development of bind sites using their respective cognate ligands as template. This is in support of a plausible “instructive” role for the ligand and therefore its involvement in determination of the structure and properties of bind sites. We emphasize the relationship between substrate and active site as an example of the relationship between ligand and bind sites, respectively. This is based on the assumption that there are shared features between all ligand:bind site complexes. Therefore, principles that apply to a specific complex can be applied, in general, to other protein-based complexes. We define ligand-associated probability bias as the difference between the probability of finding activity-determining conformations (ADCs) in the presence- and absence of ligands. For cognate ligands, the given bias is in favor of these ADCs. Thus, bind sites are more likely to assume ADCs when their cognate ligands are present. We relate such probability bias to structural reorganization, disorganization, and preorganization events. We then propose a means of deriving an [apparent] preorganized bind site structure by way of reorganization events that occur with cognate ligand. Finally, we propose a means of deriving an [actual] preorganized bind site structure by way of reorganization events that occur with cognate ligand, albeit during the folding process. The assumption is that the role of the ligand in derivation of such [actual] preorganized bind site structures is an instructive role, and is in support of the Haurowitz-Pauling hypothesis.


2016 ◽  
Author(s):  
Imadol V Jeff-Eke

We present a rationale and proposed approach to the modification and development of bind sites using their respective cognate ligands as template. This is in support of a plausible “instructive” role for the ligand and therefore its involvement in determination of the structure and properties of bind sites. We emphasize the relationship between substrate and active site as an example of the relationship between ligand and bind sites, respectively. This is based on the assumption that there are shared features between all ligand:bind site complexes. Therefore, principles that apply to a specific complex can be applied, in general, to other protein-based complexes. We define ligand-associated probability bias as the difference between the probability of finding activity-determining conformations (ADCs) in the presence- and absence of ligands. For cognate ligands, the given bias is in favor of these ADCs. Thus, bind sites are more likely to assume ADCs when their cognate ligands are present. We relate such probability bias to structural reorganization, disorganization, and preorganization events. We then propose a means of deriving an [apparent] preorganized bind site structure by way of reorganization events that occur with cognate ligand. Finally, we propose a means of deriving an [actual] preorganized bind site structure by way of reorganization events that occur with cognate ligand, albeit during the folding process. The assumption is that the role of the ligand in derivation of such [actual] preorganized bind site structures is an instructive role, and is in support of the Haurowitz-Pauling hypothesis.


2020 ◽  
Vol 2 (3) ◽  
pp. 118-123
Author(s):  
OLGA YUTSCHENKO ◽  
◽  
YULIA GAMALEEVA

The purpose of research. The article deals with the general tendencies of the formation process of a historical figure as a national hero in media space. Winston Churchill’s cinematography imagery is analyzed and the features of interpretation of his role in history are defined. The purpose of research is determination of specificities in the formation process of imagery’s historical figure as national hero in cinematography. Results. Nowadays the way of representing historical space through the media sphere is one of the most popular for auditory and at the same time, it represents the new vision of the historical past. The tendency of connecting historical past and historical figure together drifts the angle from the whole epoch to «historical faces». That's the reason why historical epochs are translated through imagery of figures from the past. In this case historical space is gradually tapered to the person’s story and becomes more individual.


Perception ◽  
1994 ◽  
Vol 23 (10) ◽  
pp. 1163-1169 ◽  
Author(s):  
Peter Wenderoth ◽  
David Alais ◽  
Darren Burke ◽  
Rick van der Zwan

Motion aftereffects (MAEs) can be induced by adaptation to a pair of differently oriented drifting gratings whether the gratings are presented simultaneously, as a coherent plaid, or in alternation. The fact that the former MAEs were generally larger than the latter led to the suggestion that simultaneous adaptation involved higher-level extrastriate processes not involved in the alternating effects. In the past few years evidence has accumulated that the difference is in fact due to a low-level monocular process which can be termed the ‘blob-tracking mechanism’. A review is presented of the evidence on MAEs induced by simultaneous and alternating adaptation, the evidence for the monocularity of the blob-tracking mechanism, the data which implicate the blob mechanism in the determination of MAE magnitude, perceived plaid drift direction, and in perceived plaid coherence.


2016 ◽  
Author(s):  
Imadol V Jeff-Eke

We present a rationale and proposed approach to the modification and development of bind sites using their respective cognate ligands as template. This is in support of a plausible “instructive” role for the ligand and therefore its involvement in determination of the structure and properties of bind sites. We emphasize the relationship between substrate and active site as an example of the relationship between ligand and bind sites, respectively. This is based on the assumption that there are shared features between all ligand:bind site complexes. Therefore, principles that apply to a specific complex can be applied, in general, to other protein-based complexes. We define ligand-associated probability bias as the difference between the probability of finding activity-determining conformations (ADCs) in the presence- and absence of ligands. For cognate ligands, the given bias is in favor of these ADCs. Thus, bind sites are more likely to assume ADCs when their cognate ligands are present. We relate such probability bias to structural reorganization, disorganization, and preorganization events. We then propose a means of deriving an [apparent] preorganized bind site structure by way of reorganization events that occur with cognate ligand. Finally, we propose a means of deriving an [actual] preorganized bind site structure by way of reorganization events that occur with cognate ligand, albeit during the folding process. The assumption is that the role of the ligand in derivation of such [actual] preorganized bind site structures is an instructive role, and is in support of the Haurowitz-Pauling hypothesis.


2015 ◽  
Vol 16 (1) ◽  
pp. 20-27
Author(s):  
A. Shirinyan

A thermodynamics of a new phase formation in a binary alloy, taking into account the chemical depletion and the size distribution of new phase nuclei giving the energy input at high temperatures, is considered. It is shown the principal possibility of obtaining of the size distribution function for nuclei in the framework of a general variation procedure for the Gibbs free energy functional. The ‘chemical depletion’ related to the difference of compositions of the new phase embryo and the solution of the solid metastable alloy is discussed. The role of the ‘mesoentropy’ for the determination of whole energy of first order phase transformation is manifested.


Author(s):  
Ariuka I. Gelyaeva ◽  
Dzhamiliyat Dzh. Khuchinaeva

The article is devoted to identification of the features of the Karachai-Balkarian lullaby as a text of a complex semiotic nature and determination of the role of verbal and non-verbal components in the organization of an integral communicative space. It is postulated that the difference in sign is characteristic not only of modern texts, born of scientific and technological progress, which changed the sign nature of information, but also of a lullaby. It is noted that in linguistics, the study of a lullaby as a polycode text is not one of the intensively developed ones, and in the Karachai-Balkarian language its linguistic understanding and description as a multilayered text is carried out for the first time, which determines the relevance of the work. The main method for analyzing empirical material is the semiotic method of studying the text as an integral system of interdependent signs and symbols. Elements of discourse and phonosemantic analysis are also used. The article separately examines various semiotic layers and components syncretically presented in the text of the lullaby. The article analyzes the units of the lexical-semantic and grammatical levels of the language, which represent the verbal layer, as well as non-verbal means used in addition to the language code that accompany the verbal text of the song. Refrain “ballyau-ballyau”, “bellyay-bellyay” and the dominant sounds of the text «l-l’», «б-б’» according to their acoustic and physical characteristics, they are subordinated to the main strategy of a lullaby - calming and lulling a child. Particular attention is paid to determining the role of verbal and non-verbal signs in the implementation of synsemantics of the text of a lullaby. The novelty of the research lies in the identification of the specificity of the lullaby as a text of a different-sign nature, which manifests itself in the syncretism of various semiotic components, which in the text space are in complementarity relations. The multidimensionality of vectors of interaction of verbal, paraverbal, kinetic, symbolic components in a lullaby is revealed. It has been established that the verbal layer mainly performs an informative function, non-verbal means - expressive and pictorial functions.


2019 ◽  
Vol 19 (1) ◽  
pp. 36
Author(s):  
Kriswoyo Kriswoyo ◽  
Jimmy Pello ◽  
Ludji M. Riwu Kaho

Manggarai communities has been in and around the area of Ruteng Recreation Parksince before the establishment. The determination of the area for conservation cause tenure conflictsfor the closure region for access to agricultural and the timber. The conflict resolution involves three elements, namely the government, customs and religion are called the three pillars. This study aims to understand the stages of the conflict tenure in Manggarai, relevant stakeholders and the role of the three pillars in conflict resolution. The study was conducted in four villages with village conflicting criteria and do not conflict in April to May 2016. Acquisition of data using observation, in-depth interviews with a purposive and snowball and secondary data. Analysis of data using analysis of tree conflicts, stakeholders and conflict mapping. The results showed that the cause of the conflict which is the difference value systems which have implications for the disagreement land status and boundaries as well as the uncertainty of access due to rights issues and access. Ruteng Recreation Park area assignment is not determined by the collective perception that lack of support of the parties. Ruteng Recreation Parksetting legislation and its implementation does not guarantee the security of rights and indigenous peoples' access due to constraints of knowledge and understanding of the laws and regulations, resource constraints, regulatory and administrative development issues. The concept of the three pillars was not optimal because it has not reduced the rate of destruction of Ruteng Recreation Park and there were still conflict of encroachment and illegal logging.


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