scholarly journals Semiochemical signatures associated with differential attraction of Anopheles gambiae to human feet

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0260149
Author(s):  
Maurice O. Omolo ◽  
Isaiah O. Ndiege ◽  
Ahmed Hassanali
Keyword(s):  
Anopheles Gambiae ◽  
Behavioral Response ◽  
Physiological State ◽  
Field Conditions ◽  
Chemical Compositions ◽  
Human Beings ◽  
Repellent Effect ◽  
Chemical Signature ◽  
Natural Concentration ◽  
The Individual

Background Several human-produced volatiles have been reported to mediate the host-seeking process under laboratory conditions, yet no effective lure or repellent has been developed for field application. Previously, we found a gradation of the attractiveness of foot odors of different malaria free individuals to Anopheles gambiae sensu stricto Giles. In this study, foot odor of the individual with the most attractive ‘smelly’ feet to the An. gambiae was collected, analyzed and attractive blend components identified. Methods The foot odor of the individual with the most attractive ‘smelly’ feet to the An. gambiae was trapped on Porapak Q and analyzed by gas chromatography-linked mass spectrometry (GC-MS). Specific constituents perceived by the insect olfactory system were then identified by GC-linked to electro-antennography detector (GC-EAD) and characterized by GC-MS. The contribution of each constituent to the behavioral response of An. gambiae was assessed through subtractive assays under semi-field conditions in a screen-house using Counter Flow Geometry (CFG traps) baited with (i) the blend of all the EAD-active and (ii) other blends containing all components with exclusion of one component at a time. The number of mosquitoes trapped in the baited CFG traps were compared with those in the control traps. Results Eleven major and minor constituents: 2 carboxylic acids, six aldehydes, two ketones and one phenolic compound, were confirmed to be EAD-active. The contribution of each constituent to the behavioral response of An. gambiae was assessed through subtractive assays under semi- field conditions. Exclusion/ subtraction of one of the following compounds: i-butyric acid, i-valeric acid, n-octanal, n-nonanal, n-decanal, n-dodecanal, undecanal or n-tridecanal, from each blend led to reduction in the attractiveness of all the resulting blends, suggesting that all of them are critical/important for the attractiveness of the foot odor to An. gambiae mosquitoes. However, exclusion/subtraction of 4-ethoxyacetophenone, 4-ethylacetophenone and/or 2-methylphenol, led to significant enhancements in the attractiveness of the resulting blends, suggesting that each of these compounds had repellent effect on An. gambiae ss. Undecanal exhibited kairomonal activity at low natural concentrations under semi-field conditions but repellent activity at high unnatural conditions in the laboratory. Furthermore, the comparison of the mean mosquito catches in traps baited with the nine-component blend without 4-ethoxyacetophenone, 4-ethylacetophenone and the complete foot odor collection revealed that the former is significantly more attractive and confirmed the repellent effect of the two carbonyl compounds at low natural concentration levels. Conclusion These results suggest that differential attractiveness of An. gambiae to human feet is due to qualitative and/or qualitative differences in the chemical compositions of the foot odors from individual human beings and relative proportions of the two chemical signatures (attractants versus repellents) as observed from the ratios of the bioactive components in the foot odors of the most attractive and least attractive individuals. Chemical signature means the ensemble of the compounds released by the organism in a specific physiological state. The chemical signature is emitter-dependent, but does not depend on receiver response. Thus, there is only one chemical signature for one individual or species that may eventually include inactive, attractive and repellent components for another organism. The nine-component attractive blend has a potential as an effective field bait for trapping of malaria vectors in human dwellings.

“Utopia First!” A Machiavellian Conception of Solidarity in More's Utopia

Moreana ◽  
2018 ◽  
Vol 55 (Number 209) (1) ◽  
pp. 79-93
Author(s):  
Marie-Claire Phélippeau
Keyword(s):  
At Risk ◽  
Human Beings ◽  
Farm Work ◽  
The World ◽  
Social Difficulties ◽  
The Republic ◽  
The Individual ◽  
Democratic Elections ◽  
Communal Organization

This paper shows how solidarity is one of the founding principles in Thomas More's Utopia (1516). In the fictional republic of Utopia described in Book II, solidarity has a political and a moral function. The principle is at the center of the communal organization of Utopian society, exemplified in a number of practices such as the sharing of farm work, the management of surplus crops, or the democratic elections of the governor and the priests. Not only does solidarity benefit the individual Utopian, but it is a prerequisite to ensure the prosperity of the island of Utopia and its moral preeminence over its neighboring countries. However, a limit to this principle is drawn when the republic of Utopia faces specific social difficulties, and also deals with the rest of the world. In order for the principle of solidarity to function perfectly, it is necessary to apply it exclusively within the island or the republic would be at risk. War is not out of the question then, and compassion does not apply to all human beings. This conception of solidarity, summed up as “Utopia first!,” could be dubbed a Machiavellian strategy, devised to ensure the durability of the republic. We will show how some of the recommendations of Realpolitik made by Machiavelli in The Prince (1532) correspond to the Utopian policy enforced to protect their commonwealth.

Chimeras In Time-Honored Societies

Think India ◽  
2019 ◽  
Vol 22 (2) ◽  
pp. 463-466
Author(s):  
TUMMALA. SAI MAMATA
Keyword(s):  
Major Elements ◽  
The Sun ◽  
Human Beings ◽  
Life Changes ◽  
Inner Self ◽  
The World ◽  
Nature And Nurture ◽  
The Individual ◽  
The Right ◽  
Superstitious Beliefs

A river flows serenely accepting all the miseries and happiness that it comes across its journey. A tree releases oxygen for human beings despite its inner plights. The sun is never tired of its duty and gives sunlight without any interruption. Why are all these elements of nature so tuned to? Education is knowledge. Knowledge comes from learning. Learning happens through experience. Familiarity is the master of life that shapes the individual. Every individual learns from nature. Nature teaches how to sustain, withdraw and advocate the prevailing situations. Some dwell into the deep realities of nature and nurture as ideal human beings. Life is a puzzle. How to solve it is a million dollar question that can never be answered so easily. The perception of life changes from individual to individual making them either physically powerful or feeble. Society is not made of only individuals. Along with individuals it has nature, emotions, spiritual powers and superstitious beliefs which bind them. Among them the most crucial and alarming is the emotions which are interrelated to others. Alone the emotional intelligence is going to guide the life of an individual. For everyone there is an inner self which makes them conscious of their deeds. The guiding force should always force the individual to choose the right path.  Writers are the powerful people who have rightly guided the society through their ingenious pen outs.  The present article is going to focus on how the major elements bound together are dominating the individual’s self through Rabindranath Tagore’s Home and the World (1916)

CYBERBULLYING PADA MEDIA SOSIAL: Menyoroti Perilaku Cyberbullying Menurut Perspektif Model Konseling Realitas

2020 ◽  
Author(s):  
Darimis Darimis Darimis
Keyword(s):  
Social Relationships ◽  
Choice Theory ◽  
Human Beings ◽  
Important Goal ◽  
Application Procedure ◽  
Negative Impacts ◽  
Use Of The Internet ◽  
The Individual ◽  
Counseling Model ◽  
Real Responsibility

Use of the Internet has changed the paradigm of human beings communicate with one another, especially on social media. Indonesia as one of the highest in the world Facebook users make significant consequences specifically for teenagers. The trend using Facebook by teenagers has created negative impacts that is the rise of cyberbullying.Cyberbullying can significantly influence the lives of teenagers and it can be a huge burden as it can happen for a long period of time. In cyberbullying, there are cyber bullies and cyber victims as individuals involved to make the message as a reference the behavior of cyberbullying. This paper attempts to looking at the perspective of the cyberbullying behavior by reality counseling model, because reality counseling as one of the models of counseling that focuses on behavior now unrealistic and dysfunctional.Reality counseling based on the choice theory, counselee make more effective choices about the development of relational satisfactory with others. The most important goal of therapy is to make people aware of the reality that the real responsibility for her behavior was himself. This counseling can helping the individual reality of cyberbullying offenders realize the consequences of his behavior, responsible, develop positive social relationships through the application procedure techniques WDEP and techniques reality Counseling.

Living within Limits

1993 ◽  
Author(s):  
Garrett Hardin
Keyword(s):  
Population Control ◽  
Human Beings ◽  
Population Problem ◽  
The Earth ◽  
The Commons ◽  
Garrett Hardin ◽  
The Individual ◽  
Free Flow Of Information ◽  
Flow Of Information ◽  
Original Thinker

We fail to mandate economic sanity, writes Garrett Hardin, "because our brains are addled by...compassion." With such startling assertions, Hardin has cut a swathe through the field of ecology for decades, winning a reputation as a fearless and original thinker. A prominent biologist, ecological philosopher, and keen student of human population control, Hardin now offers the finest summation of his work to date, with an eloquent argument for accepting the limits of the earth's resources--and the hard choices we must make to live within them. In Living Within Limits, Hardin focuses on the neglected problem of overpopulation, making a forceful case for dramatically changing the way we live in and manage our world. Our world itself, he writes, is in the dilemma of the lifeboat: it can only hold a certain number of people before it sinks--not everyone can be saved. The old idea of progress and limitless growth misses the point that the earth (and each part of it) has a limited carrying capacity; sentimentality should not cloud our ability to take necessary steps to limit population. But Hardin refutes the notion that goodwill and voluntary restraints will be enough. Instead, nations where population is growing must suffer the consequences alone. Too often, he writes, we operate on the faulty principle of shared costs matched with private profits. In Hardin's famous essay, "The Tragedy of the Commons," he showed how a village common pasture suffers from overgrazing because each villager puts as many cattle on it as possible--since the costs of grazing are shared by everyone, but the profits go to the individual. The metaphor applies to global ecology, he argues, making a powerful case for closed borders and an end to immigration from poor nations to rich ones. "The production of human beings is the result of very localized human actions; corrective action must be local....Globalizing the 'population problem' would only ensure that it would never be solved." Hardin does not shrink from the startling implications of his argument, as he criticizes the shipment of food to overpopulated regions and asserts that coercion in population control is inevitable. But he also proposes a free flow of information across boundaries, to allow each state to help itself. "The time-honored practice of pollute and move on is no longer acceptable," Hardin tells us. We now fill the globe, and we have no where else to go. In this powerful book, one of our leading ecological philosophers points out the hard choices we must make--and the solutions we have been afraid to consider.

The Emergence of Subjectivity in the Ancient and Medieval World

2020 ◽  
Author(s):  
Jon Stewart
Keyword(s):  
Cultural History ◽  
Middle Ages ◽  
Philosophical Anthropology ◽  
Cultural Development ◽  
Western Civilization ◽  
Individual Freedom ◽  
Human Beings ◽  
The Family ◽  
The Individual ◽  
Different Cultures

This work represents a combination of different genres: cultural history, philosophical anthropology, and textbook. It follows a handful of different but interrelated themes through more than a dozen texts that were written over a period of several millennia. By means of an analysis of these texts, this work presents a theory about the development of Western Civilization from antiquity to the Middle Ages. The main line of argument traces the various self-conceptions of the different cultures as they developed historically. These self-conceptions reflect different views of what it is to be human. The thesis is that in these we can discern the gradual emergence of what we today call inwardness, subjectivity and individual freedom. As human civilization took its first tenuous steps, it had a very limited conception of the individual. Instead, the dominant principle was that of the wider group: the family, clan or people. Only in the course of history did the idea of what we know as individuality begin to emerge. It took millennia for this idea to be fully recognized and developed. The conception of human beings as having a sphere of inwardness and subjectivity subsequently had a sweeping impact on all aspects of culture, such as philosophy, religion, law, and art. Indeed, this conception largely constitutes what is today referred to as modernity. It is easy to lose sight of the fact that this modern conception of human subjectivity was not simply something given but rather the result of a long process of historical and cultural development.

scholarly journals Pro-Environmental Behavior in an Aging World: Evidence from 31 Countries

2021 ◽  
Vol 18 (4) ◽  
pp. 1748
Author(s):  
Yan Wang ◽  
Feng Hao ◽  
Yunxia Liu
Keyword(s):  
Linear Models ◽  
Population Change ◽  
Population Aging ◽  
Environmental Behavior ◽  
National Level ◽  
The Elderly ◽  
Human Beings ◽  
Individual Level ◽  
Contemporary World ◽  
The Individual

Population change and environmental degradation have become two of the most pressing issues for sustainable development in the contemporary world, while the effect of population aging on pro-environmental behavior remains controversial. In this paper, we examine the effects of individual and population aging on pro-environmental behavior through multilevel analyses of cross-national data from 31 countries. Hierarchical linear models with random intercepts are employed to analyze the data. The findings reveal a positive relationship between aging and pro-environmental behavior. At the individual level, older people are more likely to participate in environmental behavior (b = 0.052, p < 0.001), and at the national level, living in a country with a greater share of older persons encourages individuals to behave sustainably (b = 0.023, p < 0.01). We also found that the elderly are more environmentally active in an aging society. The findings imply that the longevity of human beings may offer opportunities for the improvement of the natural environment.

scholarly journals The Value of Recreational Ecosystem Services in India

2020 ◽  
Vol 3 (1) ◽  
pp. 80
Author(s):  
Muniyandi Balasubramanian
Keyword(s):  
Ecosystem Services ◽  
National Park ◽  
Economic Value ◽  
Consumer Surplus ◽  
Well Being ◽  
Vital Role ◽  
Human Beings ◽  
Forest Ecosystem Services ◽  
The Individual ◽  
Mental Well Being

Forest ecosystem services have played a vital role in human well-being. Particularly, recreational ecosystem services are creating physical and mental well-being for human beings. Therefore, the main objective of the paper is to estimate the economic value of recreational ecosystem services provides by recreational sites such as Nandi Hills and Nagarhole National Park based on the individual travel cost method in Karnataka, India. This study has used a random sampling method for 300 tourist visitors to recreational sites. The present study has also estimated the consumer surplus of the visitors. The results of the study have found that (i) economic value of two creational sites has been estimated at US $323.05 million, (ii) the consumer surplus has been estimated for Nandi Hills at US $7.45 and Nagarhole National Park at US $3.16. The main implication of the study is to design the entry fees for the recreational site and sustainable utilization of recreational ecosystem services for the present and future generations.

High-Resolution Facial Feature Saliency Mapping

Perception ◽  
1986 ◽  
Vol 15 (4) ◽  
pp. 373-386 ◽  
Author(s):  
Nigel D Haig
Keyword(s):  
Image Processing ◽  
High Resolution ◽  
Facial Feature ◽  
Human Beings ◽  
Comparison Process ◽  
Compression Technique ◽  
Feature Saliency ◽  
Basic Set ◽  
Computational Speed ◽  
The Individual

For recognition of a target there must be some form of comparison process between the image of that target and a stored representation of that target. In the case of faces there must be a very large number of such stored representations, yet human beings seem able to perform comparisons at phenomenal speed. It is possible that faces are memorised by fitting unusual features or combinations of features onto a bland prototypical face, and such a data-compression technique would help to explain our computational speed. If humans do indeed function in this fashion, it is necessary to ask just what are the features that distinguish one face from another, and also, what are the features that form the basic set of the prototypical face. The distributed apertures technique was further developed in an attempt to answer both questions. Four target faces, stored in an image-processing computer, were each divided up into 162 contiguous squares that could be displayed in their correct positions in any combination of 24 or fewer squares. Each observer was required to judge which of the four target faces was displayed during a 1 s presentation, and the proportion of correct responses for each individual square was computed. The resultant response distributions, displayed as brightness maps, give a vivid impression of the relative saliency of each feature square, both for the individual targets and for all of them combined. The results, while broadly confirming previous work, contain some very interesting and surprising details about the differences between the target faces.

History and Systems of Critical Psychology

2021 ◽  
Author(s):  
Thomas Teo
Keyword(s):  
Psychological Theory ◽  
Critical Psychology ◽  
Human Beings ◽  
Strong Basis ◽  
Psychological Practice ◽  
The Status ◽  
Critical Approaches ◽  
The Individual ◽  
Many Sources ◽  
The Relationship

Critical psychology comprises a broad range of international approaches centered around theories and practices of critique, power, resistance, and alternatives of practice. Although critical psychology had an axial age in and around the 1970s, many sources can be found decades and even centuries earlier. Critical psychology is not only about the critique of psychology, which is a broader historical and theoretical field, but about doing justice in and through theory, justice with and to groups of people, and justice to the reality of society, history, and culture as they powerfully constitute subjectivity, as well as the discipline and profession of psychology. Doing justice in and through psychological theory has a strong basis in Western critical approaches, representing a privileged position of reflection in Euro-American research institutions. Critical psychologists argue that traditional psychology is missing its subject matter and hence is not doing justice in methodology, and its practices of control and adjustment are not doing justice to the emancipatory possibilities of human agency or human science. Critical psychologists who are attempting to do justice with and to human beings are not neglecting the onto-epistemic-ethical domain, but are instead focusing on people, often marginalized or oppressed groups. Critical psychologists who want to do justice in history, culture, and society have argued that traditional psychological practice means adaption and adjustment. This means that not only subjectivity, but also the discipline and profession of psychology need to be connected with contexts. Psychologists have attempted to conceptualize the relationship between society and the individual, as well as the ability of humans not only to adapt to an environment but to change their living conditions and transform the status quo. This conceptualization also means providing concrete analyses of how current society, based in neoliberal capitalism, not only impacts individuals but also the discipline of psychology. Despite the complexities of critical psychology around the world, critical psychologists emphasize the importance of reflexivity and praxis when it comes to changing the conditions of social reality that create mental life. Given that subjectivity cannot be limited to intra-psychological processes, critical psychologists attend to relational and structural societal realities, requiring inter- and transdisciplinarity in the discipline and profession.

scholarly journals Yield, Quality and Antioxidant Properties of Indian Mustard (Brassica juncea L.) in Response to Foliar Biofortification with Selenium and Iodine

Plants ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 80 ◽  
Author(s):  
Nadezhda Golubkina ◽  
Helene Kekina ◽  
Gianluca Caruso
Keyword(s):  
Brassica Juncea ◽  
Antioxidant Properties ◽  
Indian Mustard ◽  
Ascorbic Acid Content ◽  
Soluble Solids ◽  
Sodium Selenate ◽  
Human Beings ◽  
Nitrate Accumulation ◽  
Stimulate Plant Growth ◽  
The Individual

One of the possible ways to challenge selenium (Se) and iodine (I) deficiency in human beings is the joint biofortification of plants with these elements. Though the relationship between Se and I is highly pronounced in mammals, little is known about their interactions in plants where Se and I are considered not to be essential. Peculiarities of Se and I assimilation by a natural Se accumulator, such as Brassica juncea L., cultivar Volnushka, were assessed upon joint and separate plant foliar supply with sodium selenate (50 mg Se L−1) and potassium iodide (100 mg I L−1), in two crop seasons (spring, summer). Conversely to the individual application of Se and I, their joint supply did not stimulate plant growth. Separate use of sodium selenate enhanced I accumulation by 2.64 times, while biofortification with I increased the Se content in plant leaves by 4.3 times; this phenomenon was also associated with significant increase of total soluble solids and ascorbic acid content in leaves. The joint supply of Se and I did not affect the mentioned parameters. Both joint and separate application of Se and I led to synergism between these elements in: inhibiting nitrate accumulation; stimulating flavonoids biosynthesis (2–2.3 times compared to control plants) as well as Al and B accumulation; decreasing Cd and Sr concentrations. Plant biofortification with I increased the content of Mn and decreased K and Li. The consumption of 100 g Brassica juncea leaves provided 100% of the adequate human requirement of Se and 15.5% of I.

Sign in / Sign up

Export Citation Format

Share Document