Individuality and function of chemical signals during conflict resolution of a mammal

2021 ◽  
Author(s):  
Chunmian Zhang ◽  
Congnan Sun ◽  
Jeffrey R. Lucas ◽  
Hao Gu ◽  
Jiang Feng ◽  
...  
Keyword(s):  
Conflict Resolution ◽  
Chemical Signals ◽  
And Function

Does BDS Produce Antisemitic Disruption to Student Government and Jewish Student Life? An Analysis of Pro-BDS Resolutions at Ohio State University and the Exclusion of Jewish Students on Campus

2021 ◽  
Vol 4 (2) ◽  
pp. 107-120
Author(s):  
Miriam Shenkar ◽  
Jack Staples-Butler
Keyword(s):  
Conflict Resolution ◽  
Undergraduate Student ◽  
Student Activism ◽  
Ohio State University ◽  
Student Life ◽  
State University ◽  
Student Government ◽  
Constructive Dialogue ◽  
Jewish Students ◽  
And Function

Abstract The proliferation of debates and resolutions related to the “Boycott, Divestment, and Sanctions” movement at US colleges and universities raises questions about the relation­ship between the objectives of Israel- and Palestine-related student activism with that of student governments and their nature and purpose within campus life. This study makes use of direct observation by the first author of two debates held at Ohio State University (OSU) in January 2018 and December 2018 over resolutions proposed to the university’s Undergraduate Student Government (USG) to adopt a pro-BDS platform. The authors examine the recognition and non-recognition of Jewish students’ right to perceive and identify racism and exclusion within these contexts. The authors further examine whether purported goals of inclusion, constructive dialogue and conflict resolution are benefited by contemporary BDS resolution debates, concluding that such goals-in addition to the formal purpose and function of student governments-are ill-served by the process, con­tent, and outcomes of debates in the form taken at OSU.

scholarly journals The Sexual Behaviour of Chagas' Disease Vectors: Chemical Signals Mediating Communication between Male and Female Triatomine Bugs

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Gabriel Manrique ◽  
Marcelo Lorenzo
Keyword(s):  
Sexual Behaviour ◽  
Sex Pheromones ◽  
Mate Guarding ◽  
Chemical Signals ◽  
Male And Female ◽  
Calling Behaviour ◽  
Triatomine Bugs ◽  
Chagas Disease Vectors ◽  
Virgin Male ◽  
And Function

Chemical communication mechanisms that mediate sexual behaviour in triatomine bugs are reviewed with regard to source, identity, and function of sex pheromones. Males attempt to copulate but may be rejected, depending on female age and nutritional status. Triatomine males locate partners through sex pheromones emitted by the metasternal glands (MGs) of females. These activate males, inducing them to leave their refuges and initiate flight. Wandering males display anemotactic orientation modulated by chemical signals emitted from female MGs. Analyses of the MG secretions of several species resulted in the identification of numerous ketones, acetals, and alcohols. Occlusion experiments showed that Brindley’s gland products were not required for mating. Metasternal gland volatiles are emitted by virgin male and female bugs, with detection over females occurring more consistently, especially during the early scotophase, suggesting female calling behaviour. Mating triatomine females have been reported to attract males that tend to copulate successively with them. Mating males prolong mating and postcopulatory mate guarding in the presence of other males. This is indicative of a polyandrous mating system in several triatomine species. Its potential advantages remain unknown, and comparative studies are required to increase our understanding of triatomine reproductive strategies.

The Rhythms of Transformation: Theatre And Conflict Resolution in Northern Nigeria

2007 ◽  
Vol 23 (2) ◽  
pp. 161-170
Author(s):  
Samuel Ayedime Kafewo
Keyword(s):  
Conflict Resolution ◽  
Performing Arts ◽  
Direct Interaction ◽  
Northern Region ◽  
Structure And Function ◽  
Northern Nigeria ◽  
Forum Theatre ◽  
Religious Intolerance ◽  
And Function ◽  
Future Practice

It has become axiomatic that theatre not only depends on conflict but also deploys it in its structure and function. Theatre is therefore working in familiar territory when it is utilized in a project dealing with conflict resolution and transformation, based on direct interaction with and intervention by the audience. In this paper Samuel Ayedime Kafewo examines one such experiment in which Boal's Forum Theatre techniques were used to address the issues of ethnic and religious intolerance in the northern region of Nigeria. The paper discusses how the process of choices, decisions, and consequences was used to explore the varying dimensions and manifestations of conflict with the members of the various communities, and how far this contributed to resolving the issues in conflict and led to positive lessons for those involved. The paper concludes by looking at some of the shortcomings of the experiment and suggests ways of strengthening future practice. Samuel Ayedime Kafewo teaches in the Department of Theatre and Performing Arts, Ahmadu Bello University, Zaria, Nigeria.

Friend or foe? Social system influences the allocation of signals across functional categories in the repertoires of the New World jays

Behaviour ◽  
2016 ◽  
Vol 153 (4) ◽  
pp. 467-524 ◽  
Author(s):  
Gabriel L.M. Rosa ◽  
Jesse M. Ellis ◽  
Elisa Bonaccorso ◽  
Luiz dos Anjos
Keyword(s):  
Conflict Resolution ◽  
Social Integration ◽  
New World ◽  
Current Knowledge ◽  
A Priori ◽  
Functional Categories ◽  
Repertoire Size ◽  
Vocal Behaviour ◽  
Functional Classes ◽  
And Function

Many factors could influence repertoire size and function. Here, we provide a review of the descriptions of vocal repertoires of New World jays and a unifying terminology for function of their vocalizations. We summarized 19 different functional types of vocal behaviour shared by at least two species, for review purposes. Comparing the 14 studied species, we also classified vocalizations into four major classes defined a priori: ‘Social Integration’, ‘Conflict Resolution’, ‘Predator-related’, and ‘Breeding’. Cooperative breeding, as well as group size, are related not only to repertoire size, but to how species allocate their vocalizations into functional classes. We discuss the tendencies of Conflict Resolution and Social Integration and the possibility of the existence and implications of a trade-off between those functional classes. We identified gaps in the current knowledge on vocalizations of the studied species, and emphasize the importance of empiric evidence of vocalization function in the New World jays.

Conformation of Ribosomes from Escherichia Coli

1974 ◽  
Vol 32 ◽  
pp. 210-211
Author(s):  
M. Boublik ◽  
W. Hellmann ◽  
F. Jenkins
Keyword(s):  
Binding Sites ◽  
Ribosomal Proteins ◽  
Fluorescent Dyes ◽  
Protein Biosynthesis ◽  
Three Dimensional ◽  
Spatial Arrangement ◽  
Dimensional Structure ◽  
Complete Understanding ◽  
And Function

The present knowledge of the three-dimensional structure of ribosomes is far too limited to enable a complete understanding of the various roles which ribosomes play in protein biosynthesis. The spatial arrangement of proteins and ribonuclec acids in ribosomes can be analysed in many ways. Determination of binding sites for individual proteins on ribonuclec acid and locations of the mutual positions of proteins on the ribosome using labeling with fluorescent dyes, cross-linking reagents, neutron-diffraction or antibodies against ribosomal proteins seem to be most successful approaches. Structure and function of ribosomes can be correlated be depleting the complete ribosomes of some proteins to the functionally inactive core and by subsequent partial reconstitution in order to regain active ribosomal particles.

The Effect of Oxidized Cholesterol on the Aorta of Rabbits- Scanning Electron Microscopic Observations

1982 ◽  
Vol 40 ◽  
pp. 340-341
Author(s):  
S. K. Pena ◽  
C. B. Taylor ◽  
J. Hill ◽  
J. Safarik
Keyword(s):  
Cholesterol Biosynthesis ◽  
Cholesterol Content ◽  
Arterial Injury ◽  
Electron Microscopic ◽  
Aortic Smooth Muscle ◽  
Oxidized Cholesterol ◽  
Initial Event ◽  
Membrane Structure And Function ◽  
Scanning Electron Microscopic ◽  
And Function

Introduction: Oxidized cholesterol derivatives have been demonstrated in various cell cultures to be very potent inhibitors of 3-hvdroxy-3- methylglutaryl Coenzyme A reductase which is a principle regulator of cholesterol biosynthesis in the cell. The cholesterol content in the cells exposed to oxidized cholesterol was found to be markedly decreased. In aortic smooth muscle cells, the potency of this effect was closely related to the cytotoxicity of each derivative. Furthermore, due to the similarity of their molecular structure to that of cholesterol, these oxidized cholesterol derivatives might insert themselves into the cell membrane, alter membrane structure and function and eventually cause cell death. Arterial injury has been shown to be the initial event of atherosclerosis.

Ultrastructure of developing visual cortical synapses in the cat superior colliculus

1991 ◽  
Vol 49 ◽  
pp. 156-157
Author(s):  
Caroline A. Miller ◽  
Laura L. Bruce
Keyword(s):  
Superior Colliculus ◽  
Phosphate Buffer ◽  
Receptive Fields ◽  
Visual Cortical Area ◽  
Cortical Synapses ◽  
Visual Cortical ◽  
And Function ◽  
Phosphate Buffered Saline ◽  
The Brain ◽  
Cat Superior Colliculus

The first visual cortical axons arrive in the cat superior colliculus by the time of birth. Adultlike receptive fields develop slowly over several weeks following birth. The developing cortical axons go through a sequence of changes before acquiring their adultlike morphology and function. To determine how these axons interact with neurons in the colliculus, cortico-collicular axons were labeled with biocytin (an anterograde neuronal tracer) and studied with electron microscopy.Deeply anesthetized animals received 200-500 nl injections of biocytin (Sigma; 5% in phosphate buffer) in the lateral suprasylvian visual cortical area. After a 24 hr survival time, the animals were deeply anesthetized and perfused with 0.9% phosphate buffered saline followed by fixation with a solution of 1.25% glutaraldehyde and 1.0% paraformaldehyde in 0.1M phosphate buffer. The brain was sectioned transversely on a vibratome at 50 μm. The tissue was processed immediately to visualize the biocytin.

Structural modifications of intercellular junctions.

1978 ◽  
Vol 36 (2) ◽  
pp. 330-331
Author(s):  
J. Metz ◽  
M. Merlo ◽  
W. G. Forssmann
Keyword(s):  
Gap Junctions ◽  
Intercellular Junctions ◽  
Cell Isolation ◽  
Extrahepatic Cholestasis ◽  
Structural Modifications ◽  
Pancreatic Duct Ligation ◽  
Pancreatic Cells ◽  
Duct Ligation ◽  
Thin Sectioning ◽  
And Function

Structure and function of intercellular junctions were studied under the electronmicroscope using conventional thin sectioning and freeze-etch replicas. Alterations of tight and gap junctions were analyzed 1. of exocrine pancreatic cells under cell isolation conditions and pancreatic duct ligation and 2. of hepatocytes during extrahepatic cholestasis.During the different steps of cell isolation of exocrine pancreatic cells, gradual changes of tight and gap junctions were observed. Tight junctions, which formed belt-like structures around the apex of control acinar cells in situ, subsequently diminished, became interrupted and were concentrated into macular areas (Fig. 1). Aggregations of membrane associated particles, which looked similar to gap junctions, were intermixed within tight junctional areas (Fig. 1). These structures continously disappeared in the last stages of the isolation procedure. The intercellular junctions were finally separated without destroying the integrity of the cell membrane, which was confirmed with porcion yellow, lanthanum chloride and horse radish peroxidase.

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