scholarly journals IAA-peroxidase relation in the microsporocytes and anther wall during successive stages of meiosis in Larix europaea L.

2014 ◽  
Vol 50 (1-2) ◽  
pp. 67-73 ◽  
Author(s):  
Alicja Górska-Brylass ◽  
Wiesława B. Chwirot ◽  
Leszek Michalski
Keyword(s):  
Peroxidase Activity ◽  
Reverse Correlation ◽  
Anther Wall ◽  
Endogenous Auxin ◽  
Iaa Oxidase ◽  
Positive Correlation ◽  
Auxin Content

During anther meiosis in <em>Larix europaea</em> considerable variations in the level of peroxidase activity and endogenous auxin content occur both in the microsporocytes and in the anther wall. However, the IAA-peroxidase relations are different in each of these two parts of the anther. In the anther wall characterized by the occurrence of anodic isoperoxidases, the changes in peroxidae activity show a positive correlation with those in endogenous auxin content. In the microsporocytes containing almost only cathodic asoperoxidases the levels of endogenous auxin content and peroxidase activity show a reverse correlation. Thus a preponderance of isoperoxidases showing IAA-oxidase properties occur only in the microsporocytes. These results suggest the important role of the IAA=peroxidase system in the mechanism of differentiation of cells undergoing anther meiosis.

An ESR study of the peroxidase reaction catalyzed by human methaemoglobin and methaemoglobin-haptoglobin complex

1991 ◽  
Vol 56 (4) ◽  
pp. 923-932
Author(s):  
Jana Stejskalová ◽  
Pavel Stopka ◽  
Zdeněk Pavlíček
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Amino Acid ◽  
Peroxidase Activity ◽  
Amino Acid Analysis ◽  
Superoxide Radical ◽  
Esr Spectra ◽  
The Other ◽  
Delocalized Electron

The ESR spectra of peroxidase systems of methaemoglobin-ascorbic acid-hydrogen peroxide and methaemoglobin-haptoglobin complex-ascorbic acid-hydrogen peroxide have been measured in the acetate buffer of pH 4.5. For the system with methaemoglobin an asymmetrical signal with g ~ 2 has been observed which is interpreted as the perpendicular region of anisotropic spectrum of superoxide radical. On the other hand, for the system with methaemoglobin-haptoglobin complex the observed signal with g ~ 2 is symmetrical and is interpreted as a signal of delocalized electron. After realization of three repeatedly induced peroxidase processes the ESR signal of the perpendicular part of anisotropic spectrum of superoxide radical is distinctly diminished, whereas the signal of delocalized electron remains practically unchanged. An amino acid analysis of methaemoglobin along with results of the ESR measurements make it possible to derive a hypothesis about the role of haptoglobin in increasing of the peroxidase activity of methaemoglobin.

Leisure Functioning and Offender Rehabilitation

2016 ◽  
Vol 61 (2) ◽  
pp. 150-170 ◽  
Author(s):  
Alison J. Link ◽  
D J Williams
Keyword(s):  
Intrinsic Motivation ◽  
Empirical Evidence ◽  
Offender Rehabilitation ◽  
Strong Positive Correlation ◽  
Statistical Relationship ◽  
Leisure Education ◽  
Positive Correlation ◽  
Independent Variables ◽  
Rehabilitation Strategy

This study examined the statistical relationship between offender rehabilitation and leisure functioning of Oregon prisoners ( N = 281) soon to reenter society. The strong positive correlation between leisure functioning and rehabilitation is an important finding of the study. Perception of freedom and intrinsic motivation in leisure, as independent variables, were significantly related to rehabilitation even when controlling for the influence of demographic and important forensic variables. This study provides initial empirical evidence for the importance of leisure in offender rehabilitation and successful offender reentry. The role of leisure education programming as a supportive offender rehabilitation strategy is also discussed.

scholarly journals Will the Bacteria Survive in the CeO2 Nanozyme-H2O2 System?

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3747
Author(s):  
Weisheng Zhu ◽  
Luyao Wang ◽  
Qisi Li ◽  
Lizhi Jiao ◽  
Xiaokan Yu ◽  
...  
Keyword(s):  
Peroxidase Activity ◽  
Biomedical Applications ◽  
Antibacterial Effect ◽  
Ros Production ◽  
Ros Scavenging ◽  
Ros Scavenger ◽  
Oxide Nanoparticle ◽  
H2o2 System ◽  
Bacterial Disinfection

As one of the nanostructures with enzyme-like activity, nanozymes have recently attracted extensive attention for their biomedical applications, especially for bacterial disinfection treatment. Nanozymes with high peroxidase activity are considered to be excellent candidates for building bacterial disinfection systems (nanozyme-H2O2), in which the nanozyme will promote the generation of ROS to kill bacteria based on the decomposition of H2O2. According to this criterion, a cerium oxide nanoparticle (Nanoceria, CeO2, a classical nanozyme with high peroxidase activity)-based nanozyme-H2O2 system would be very efficient for bacterial disinfection. However, CeO2 is a nanozyme with multiple enzyme-like activities. In addition to high peroxidase activity, CeO2 nanozymes also possess high superoxide dismutase activity and antioxidant activity, which can act as a ROS scavenger. Considering the fact that CeO2 nanozymes have both the activity to promote ROS production and the opposite activity for ROS scavenging, it is worth exploring which activity will play the dominating role in the CeO2-H2O2 system, as well as whether it will protect bacteria or produce an antibacterial effect. In this work, we focused on this discussion to unveil the role of CeO2 in the CeO2-H2O2 system, so that it can provide valuable knowledge for the design of a nanozyme-H2O2-based antibacterial system.

The heme moiety in peanut peroxidase

1984 ◽  
Vol 62 (11) ◽  
pp. 1046-1050 ◽  
Author(s):  
R. N. Chibbar ◽  
R. Cella ◽  
R. B. Van Huystee
Keyword(s):  
Peroxidase Activity ◽  
Active Site ◽  
Oxidase Activity ◽  
Indoleacetic Acid ◽  
Iaa Oxidase ◽  
Equimolar Ratio ◽  
Immunological Properties ◽  
Peanut Peroxidase

Heme is present in an equimolar ratio to the apoprotein in the major cationic fraction of peanut peroxidase. The removal of heme from the holoenzyme does not affect the physicochemical and immunological properties of the apoperoxidase, however peroxidase activity is completely lost. The indoleacetic acid (IAA) oxidase activity of the apoperoxidase is reduced to 1/20 of the original holoenzyme. Both the peroxidase and IAA-oxidase activity could partially be restored in the holoenzyme reconstituted with hemin. It is suggested that heme may also participate in the IAA-oxidase activity possibly by altering the active site.

scholarly journals Variety of Economic Share of Tourism on Tropical Islands

2010 ◽  
Vol 14 (1) ◽  
pp. 303-314
Author(s):  
Katarzyna Podhorodecka
Keyword(s):  
Case Studies ◽  
Correlation Coefficient ◽  
Spearman Correlation ◽  
Tropical Islands ◽  
Chi Square ◽  
Tropical Island ◽  
Positive Correlation ◽  
Detailed Case ◽  
Chi Square Test

Abstract The author seeks an answer to the question whether a higher intensity of tourism movement is connected with a higher share of tourism in the economy in selected tropical island territories. With the use of the Spearman correlation coefficient, the existence of the average positive correlation between the intensity of tourism movement and the share of tourism in the economy has been determined. In the second part of paper, the author looks at the conditions which affect the role of tourism in the economy in proportion to the intensity of tourism movement. For this purpose, the Chi-square test and detailed case studies of chosen tropical islands are discussed.

scholarly journals Immunohistochemical analysis of beta-catenin expression: a probable prognostic marker and potential therapeutic target in renal cell carcinoma

2021 ◽  
Author(s):  
Ayan Kundu ◽  
Anway Sen ◽  
Shouvik Choudhury ◽  
Tapan Kumar Mandal ◽  
Debasish Guha ◽  
...  
Keyword(s):  
Renal Cell Carcinoma ◽  
Cell Carcinoma ◽  
Renal Cell ◽  
Tumor Stage ◽  
Low Grade ◽  
Beta Catenin ◽  
High Grade ◽  
Positive Correlation ◽  
Score Difference

Background and aims. Renal cell carcinoma (RCC) seems to be the most aggressive type of genitourinary neoplasm. Down regulation of normal beta-catenin expression contributes to development of RCC, reflecting the role of beta-catenin/Wnt signaling pathway in pathogenesis. This study aims to evaluate the significance of beta-catenin expression and its correlation with the prognostic parameters. Methods. A cross-sectional observational study was carried out in a tertiary care center on 58 RCC cases using variables like histological grade and type, tumor stage, necrosis. Formalin fixed, paraffin-embedded blocks were evaluated for beta-catenin expression by immunohistochemistry using scoring system. Data were analyzed by mean ± SD, χ2 test, Pearson’s correlation test. Results. Membranous score (MS) had a strong negative correlation with tumor stage (r = -0.407, p = 0.044) and grade (r = -0.787, p = <0.001). Mean membranous score difference between low (Stage 1 and 2) vs. high stage (Stage 3 and 4) and low (Grade 1 and 2) vs. high grade (Grade 3 and 4) was statistically significant (p < 0.001). Cytoplasmic score (CS) had positive correlation with tumor stage (r = 0.586; p = 0.002). No significant correlation was evident between cytoplasmic scores and tumor grade, however the mean cytoplasmic score difference between low grade vs. high grade was statistically significant (p < 0.001). Conclusion. Beta-catenin may play a crucial role in the pathogenesis of RCC and has a positive correlation with the biological behavior of this tumor. The important role of beta-catenin as a prognostic parameter and probably a critical evaluator of targeted chemotherapy cannot be overemphasized.

scholarly journals Management Problems in Global Crowdsourcing

2022 ◽  
Vol 30 (3) ◽  
pp. 1-15
Author(s):  
Zhijiang Liu ◽  
Tatyana Sakulyeva ◽  
Alexey Mikheev ◽  
Diana Stepanova
Keyword(s):  
Intellectual Property ◽  
Property Rights ◽  
Intellectual Property Rights ◽  
Project Success ◽  
Information Leakage ◽  
Ethical Conduct ◽  
Predominant Role ◽  
Positive Correlation ◽  
Security Guarantees

The study aimed to develop recommendations for the optimization of settings in which the crowdsourcing project takes place. Findings show that crowdfunding projects are hybrid and include the elements of crowdsourcing, crowdsensing, crowdfunding, crowdworking, and crowdsourced recruitment. The predominant role of security guarantees was identified. It turned out that relations irreducible to a simple hierarchy pose many challenges. The results indicate that leading issues include the lack of financial guarantees and the likelihood of information leakage to competitors. Hence, the priority is to manage the exchange of money and information. An interesting finding demonstrates a positive correlation between project success, ethical conduct, and fair distribution of gains. The protection of intellectual property rights was no less important. As it was concluded in the course of analysis, the more successful the project, the more thoroughly it addresses the protection of someone else's intellectual property.

scholarly journals The Effect of Fear of the COVID-19 on Depression Among Chinese Outbound Students Studying Online in China Amid the COVID-19 Pandemic Period: The Role of Resilience and Social Support

2021 ◽  
Vol 12 ◽  
Author(s):  
Yikang Chen ◽  
Yifan Liu ◽  
Yuxuan Zhang ◽  
Zheng Li ◽  
Tianshu Zhou
Keyword(s):  
Social Support ◽  
Online Survey ◽  
Potential Role ◽  
Mental States ◽  
Moderating Effect ◽  
Mediating Effect ◽  
Moderating Effects ◽  
Positive Correlation ◽  
Online Mode

Objective: The present study focused on examining fear of the coronavirus disease 2019 (COVID-19) is correlated with depression and explored the potential role of resilience and social support on the association between fear of the COVID-19 (FoC) and depression among Chinese outbound students studying online in China amid the COVID-19 pandemic period.Methods: A total of 476 Chinese outbound students from different universities worldwide, currently studying via online mode in China, completed an online survey including measures on FoC, resilience, social support, and depression.Results: (1) Fear of the COVID-19 was positively correlated with depression and negatively correlated with resilience and social support. Both resilience and social support were negatively correlated with depression. Social support showed a positive correlation with resilience. (2) The effect of FoC on depression mainly occurred through two paths: the mediating effect of resilience and the moderating effect of resilience. However, the moderating effect of social support on the association between FoC and depression was not sustained in this study.Conclusion: This study indicated the mediating and moderating effects of resilience on the association between FoC and depression among Chinese outbound students studying online in China during the COVID-19 pandemic period. The current findings confirmed that resilience has significant implications in preventing negative mental states under the COVID-19 context among this particular group.

scholarly journals The Mediating Role of Alexithymia in the Relationship of Coping Strategies and Personality Traits With Obsessive-Compulsive Disorder

2021 ◽  
Vol 27 (1) ◽  
pp. 62-81
Author(s):  
Masoud Bagheri ◽  
◽  
Kazem Nematollah Zadeh Mahani ◽  
Maryam Pour Amrollahi ◽  
◽  
...  
Keyword(s):  
Personality Traits ◽  
Coping Strategies ◽  
Obsessive Compulsive Disorder ◽  
Psychological Health ◽  
Obsessive Compulsive ◽  
Positive Correlation ◽  
Compulsive Disorder ◽  
Mediating Role ◽  
The Relationship

Aims: Obsessive-Compulsive Disorder (OCD) is one of the severe psychological health problems imposing considerable social and economic costs on society. OCD debilitating symptoms can disrupt interpersonal relations, job performance, and life quality. The purpose of this study is to investigate the mediating role of alexithymia in the relationship between coping strategies and personality traits with OCD. Methods & Materials: This is a descriptive correlational study. The study population consists of all people with OCD referred to psychiatric clinics in Kerman City, Iran, during 2018-2019. Of this population, 200 patients were selected using a convenience sampling method. Research instruments included the ways of coping questionnaire, NEO five-factor personality inventory, Toronto alexithymia scale, and Maudsley obsessive-compulsive test. The obtained data were analyzed using the Pearson correlation test and simultaneous and hierarchical regression in SPSS v. 23. Findings: Personality traits had a negative significant correlation with alexithymia (r=0.523, P<0.000) and OCD (r=0.253, P<0.000). Alexithymia had a significant positive correlation with OCD (r=0.272, P<0.000). There was no correlation between problem-focused coping and alexithymia (r=-0.045, P<0.531). There was a positive correlation between emotion-focused coping and OCD (r=0.198, P<0.000). The fit indices indicated a good fit of the proposed model (P<0.005). Conclusion: Alexithymia, as a mediator of the relationship between coping styles and personality traits with OCD, plays an essential role in improving the psychological health of people with OCD.

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