scholarly journals Relationship of Motility Activation to Lipid Composition, Protein Profile, and Swelling Rate of Burbot Lota lota Spermatozoon Following Change of Temperature and Osmolality

2021 ◽  
Vol 8 ◽  
Author(s):  
Hadiseh Dadras ◽  
Tomas Policar ◽  
Dmitry Loginov ◽  
Sergii Boryshpolets ◽  
Yana Loginova ◽  
...  

Despite available information on the roles of osmotic pressure, potassium (K+), and calcium (Ca2+) in activation of Eurasian burbot spermatozoon motility, the changes in milt biochemical composition and mechanisms underlying their activation at temperatures above optimal spawning temperature is still unclear. We explored spermatozoon swelling, lipid composition and proteome in relation to osmolality and temperature of swimming medium. The result revealed that temperature increment from 4 to 30°C increases burbot spermatozoa vulnerability to osmotic pressure, decreasing motility in extremely hypotonic media, and the presence of Ca2+ decreases swelling of spermatozoa. No spermatozoon swelling was observed in non-ionic isotonic media at all studied temperatures. A role of swelling in activation of spermatozoa motility at 30°C was rejected. No differences were found in protein profile and lipid composition with respect to activation of burbot spermatozoa at 30°C. Burbot spermatozoon activation occurs at 30°C without modification of the spermatozoon membrane. Elucidation of the intrinsic signaling pathway of burbot spermatozoon spontaneous activation requires further study.

Author(s):  
Haniyeh Gaffari-Nazari ◽  
Samira Karami ◽  
Leila Noorazar ◽  
Sayeh Parkhideh ◽  
Elham Roshandel ◽  
...  

Background: The PI3K/Akt/mTOR signaling pathway is one of the most important intracellular signaling pathways by regulating the cell cycle process. The direct relationship of this pathway with important mechanisms such as cell quiescence, longevity, and proliferation has been established. The overactive PI3K pathway with decreased and increased apoptosis and cell proliferation respectively is involved in pathogenesis of many cancers, including blood malignancies such as leukemia. Methods: Laboratory findings have shown that different factors, such as miRNAs, play a role in regulating PI3K signaling pathway. These molecules can alter the fate of a cell by interfering in suppression/overexpression of mRNA, transcription factors or stimulating the transcription of some genes. In this article, we reviewed the role of miRNAs in regulating the PI3K/Akt/mTOR pathway and its effect on leukemic progression and treatment failure. Conclusion: At present, miRNAs are known to be one of the causes of treatment failure and relapse in cancers.


2006 ◽  
Vol 175 (4S) ◽  
pp. 95-95
Author(s):  
Raymond R. Rackley ◽  
Mei Kuang ◽  
Ashwin A. Vaze ◽  
Joseph Abdelmalak ◽  
Sandip P. Vasavada ◽  
...  

2014 ◽  
Vol 4 (2) ◽  
pp. 106-112
Author(s):  
Anita Shrivastava ◽  
Andrea Burianova

This study aimed to explore the relationships between attachment styles, proximity, and relational satisfaction. This was achieved by assessing a distinct type of long distance romantic relationship of flying crews, compared with proximal (non-flying crew) romantic relationships. The responses of 139 expatriate professionals revealed significant associations between proximity and anxious and avoidant attachment dimensions. The role of the avoidant dimension in comparison with that of the anxious dimension was found to be a significant predictor of relational satisfaction. This study contributes significantly toward addressing the role of proximity and attachment in relational satisfaction in a new context of geographic separation.


2019 ◽  
Vol 4 (1) ◽  
pp. 474
Author(s):  
Fipitriany Any

ABSTRACT The purpose of this study is to examine and analyze the influence of the role, ethics, and independence of internal auditors in implementing good university governance (GUG) with leadership style as a moderation variable. Multiple linear regression and moderation regression analysis models are used to test the hypothesis. The primary data are obtained through questionnaires that are distributed to the respondents, namely the dean and head of study program at the UniversitasBinaDarma and UniversitasMuhammadiyahPalembang. The results of this study indicate that the instruments in each variable proved to be valid and reliable. Based on the results of hypothesis testing, it can be seen that simultaneously the variable of role, ethics, and independence of internal auditors have positively and significantly effect in implementing good university governance (GUG). These results provide justification or endorsement of the theoretical truths used as the theoretical references of Stewardship Theory and Attitude and Behavioral Theory. Based on the partial test, role of auditor does not significantly affect the variable of GUG, but ethics and independence variable are found to be significant in influencing GUG. The leadership style is negative and insignificant in moderating the role of internal auditors and GUC and also the independence of internal auditor and GUC. The leadership style is found to be positive and insignificant in moderating the relationship of internal auditors’ ethics and GUC.Keywords        Role, Ethics, Independence, Internal Auditor, Leadership Style, Good University Governance  ABSTRAK Tujuan dari penelitian ini adalah untuk menguji dan menganalisis pengaruh peran, etika, dan independensi auditor internal dalam menerapkan good university governance (GUG) dengan gaya kepemimpinan sebagai variabel moderasi. Model analisis regresi linier berganda dan regresi moderasi digunakan untuk menguji hipotesis. Data primer diperoleh melalui kuesioner yang dibagikan kepada responden, yaitu dekan dan ketua program studi di Universitas Bina Darma dan Universitas MuhammadiyahPalembang. Hasil penelitian ini menunjukkan bahwa instrumen dalam setiap variabel terbukti valid dan dapat diandalkan. Berdasarkan hasil pengujian hipotesis dapat dilihat bahwa secara simultan variabel peran, etika, dan independensi auditor internal berpengaruh positif dan signifikan dalam penerapan good university governance (GUG). Hasil ini memberikan pembenaran atau pengesahan kebenaran teoretis yang digunakan sebagai referensi teoretis dari Teori Penatalayanan dan Teori Sikap dan Perilaku. Berdasarkan uji parsial, peran auditor tidak secara signifikan mempengaruhi variabel GUG, tetapi variabel etika dan independensi ditemukan signifikan dalam mempengaruhi GUG. Gaya kepemimpinan negatif dan tidak signifikan dalam memoderasi peran auditor internal dan GUC dan juga independensi auditor internal dan GUC. Gaya kepemimpinan ditemukan menjadi positif dan tidak signifikan dalam memoderasi hubungan etika auditor internal dan GUC Kata Kunci            Peran, Etika, Independensi, Auditor Internal, Gaya Kepemimpinan, Tata Kelola Universitas


2020 ◽  
Vol 17 (6) ◽  
pp. 76-91
Author(s):  
E. D. Solozhentsev

The scientific problem of economics “Managing the quality of human life” is formulated on the basis of artificial intelligence, algebra of logic and logical-probabilistic calculus. Managing the quality of human life is represented by managing the processes of his treatment, training and decision making. Events in these processes and the corresponding logical variables relate to the behavior of a person, other persons and infrastructure. The processes of the quality of human life are modeled, analyzed and managed with the participation of the person himself. Scenarios and structural, logical and probabilistic models of managing the quality of human life are given. Special software for quality management is described. The relationship of human quality of life and the digital economy is examined. We consider the role of public opinion in the management of the “bottom” based on the synthesis of many studies on the management of the economics and the state. The bottom management is also feedback from the top management.


2019 ◽  
Vol 58 (2) ◽  
pp. 249-259
Author(s):  
Joseph Acquisto

This essay examines a polemic between two Baudelaire critics of the 1930s, Jean Cassou and Benjamin Fondane, which centered on the relationship of poetry to progressive politics and metaphysics. I argue that a return to Baudelaire's poetry can yield insight into what seems like an impasse in Cassou and Fondane. Baudelaire provides the possibility of realigning metaphysics and politics so that poetry has the potential to become the space in which we can begin to think the two of them together, as opposed to seeing them in unresolvable tension. Or rather, the tension that Baudelaire animates between the two allows us a new way of thinking about the role of esthetics in moments of political crisis. We can in some ways see Baudelaire as responding, avant la lettre, to two of his early twentieth-century readers who correctly perceived his work as the space that breathes a new urgency into the questions of how modern poetry relates to the world from which it springs and in which it intervenes.


1971 ◽  
Vol 68 (1_Suppl) ◽  
pp. S279-S294 ◽  
Author(s):  
Paul Robel

ABSTRACT Of the information available on steroid hormone metabolism in responsive tissues, only that relating hormone metabolism to physiological activity is reviewed, i. e. metabolite activity in isolated in vitro systems, binding of metabolites to target tissue receptors, specific steroid hormone metabolizing enzymes and relationship of hormone metabolism to target organ physiological state. Further, evidence is presented in the androgen field, demonstrating 5α-reduced metabolites, formed inside the target cells, as active compounds. This has led to a consideration of testosterone as a »prehormone«. The possibility that similar events take place in tissues responding to progesterone is discussed. Finally, the role of hormone metabolism in the regulation of hormone availability and/or renewal in target cells is discussed. In this context, reference is made to the potential role of plasma binding proteins and cytosol receptors.


2019 ◽  
Vol 6 (2) ◽  
pp. 62-74
Author(s):  
Ivana Markov Čikić ◽  
Aleksandar Ivanovski

Summary One cannot write about the relationship of young people and current sports stars in modern society without having previously studied the processes of mediation and globalisation of sport, and the transformation of traditional social values. The goal of the science and practice engaged in sports and education of young people is a constant quest for preserving universal ethical values and reconciling them with the modern-day social processes. This paper will present the result of a survey conducted with adolescents in five different Serbian cities in order to find the answer to the question if sportspersons were their favourite television role-models. According to the results of our survey, 45% of adolescents do not have a favourite TV personality and do not know for sure who that could be. Novak Đoković, who would be the choice of adults for a role model of the young, with 63.2% according to the survey conducted by the Ministry of Youth and Sports, scored 3.81% in our survey with adolescents who would chose Novak Đoković as their favourite TV personality. The necessity of raising media literacy of young people with the aim of clear identification of sports role models who are going to improve their quality of life still remains an open issue for further research on this course.


Author(s):  
Pavel Agapov ◽  
Kirill Stepkin

The article considers the general theoretical foundations of the relationship of sectarianism and religious extremism in the Russian Federation. Practical examples of the role of destructive sects in modern religious extremism in the Russian Federation are given.


2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Emily Kaliel

The articles published in our Fall 2016 edition are connected loosely under the themes of public memory and the uses of identity in the past. We are thrilled to present to you three excellent articles in our Fall 2016 edition: The article "Dentro de la Revolución: Mobilizing the Artist in Alfredo Sosa Bravo's Libertad, Cultura, Igualdad (1961)" analyzes Cuban artwork as multi-layered work of propaganda whose conditions of creation, content, and exhibition reinforce a relationship of collaboration between artists and the state-run cultural institutions of post-revolutionary Cuba; moving through fifty years of history “’I Shall Never Forget’: The Civil War in American Historical Memory, 1863-1915" provides a captivating look at the role of reconciliationist and emancipationist intellectuals, politicians, and organizations as they contested and shaped the enduring memory of the Civil War; and finally, the article “Politics as Metis Ethnogenesis in Red River: Instrumental Ethnogenesis in the 1830s and 1840s in Red River” takes the reader through a historical analysis of the development of the Metis identity as a means to further their economic rights. We wholly hope you enjoy our Fall 2016 edition as much as our staff has enjoyed curating it. Editors  Jean Middleton and Emily Kaliel Assistant Editors Magie Aiken and Hannah Rudderham Senior Reviewers Emily Tran Connor Thompson Callum McDonald James Matiko Bronte Wells


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