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Psychodynamic Perspectives on Personality01:27

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The psychodynamic perspective in psychology asserts that most personality functions operate unconsciously, outside of awareness. This means that the motives and emotions driving behavior often remain hidden, automatically buried in the unconscious mind as a defense mechanism to shield us from psychological distress. According to this theory, the unconscious mind contains thoughts, memories, and emotions that are too disturbing to face directly.
Psychodynamic theorists argue that unconscious...
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What is Natural Selection?01:32

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Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
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Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience,...
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Social cognitive perspectives on personality emphasize the importance of conscious awareness, beliefs, expectations, and goals in shaping behavior. These perspectives incorporate behaviorist principles, such as learning through reinforcement and conditioning, but extend beyond them by highlighting human reasoning and planning. Unlike traditional behaviorist views, social cognitive theory focuses on how individuals reflect on their past experiences and plan for future outcomes by considering...
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In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
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The Behavioral Perspective on Personality01:19

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Behaviorists view personality as primarily shaped by environmental reinforcements and consequences. According to this perspective, behavior is influenced by external stimuli, and individuals adjust their actions based on rewards and punishments. Over time, learning histories — accumulated patterns of reinforcement — play a significant role in shaping personality. Behaviors that lead to positive outcomes are reinforced, while those resulting in negative outcomes are diminished.
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Perspectives on Neuroscience
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Bioflocculation in natural and engineered systems: current perspectives.

Ankita Srivastava1, Seong-Hyun Seo1, So-Ra Ko1

  • 1a Cell Factory Research Center , Korea Research Institute of Bioscience and Biotechnology , Daejeon , Republic of Korea.

Critical Reviews in Biotechnology
|April 11, 2018
PubMed
Summary

Microbial flocs, aggregates formed by microorganisms, enhance ecosystem processes like nutrient cycling and wastewater treatment. Understanding these bioflocculation dynamics is key to optimizing industrial and natural applications.

Keywords:
Bioflocculationbioflocculantsengineered systemsextracellular polymeric substancesmicroalgaemicrobial ecology

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Area of Science:

  • Microbiology
  • Environmental Science
  • Biotechnology

Background:

  • Microorganisms aggregate at interfaces, forming biofilms and flocs via extracellular polymeric substances.
  • Cellular aggregation leads to diverse microbial consortia with varied metabolic functions.
  • Microbial flocs are crucial hotspots for enhanced biological processes in ecosystems.

Purpose of the Study:

  • To review the fundamental aspects of microbial aggregation and bioflocculation.
  • To outline the role of bioflocculation in natural and industrial settings.
  • To highlight the importance of understanding microbial interactions within flocs for process optimization.

Main Methods:

  • Literature review of microbial aggregation and bioflocculation.
  • Analysis of the role of extracellular polymeric substances in floc formation.
  • Synthesis of findings on microbial interactions within flocs.

Main Results:

  • Bioflocculation drives nutrient turnover, decomposition, and organic matter dynamics.
  • Microbial flocs are vital for wastewater treatment and biomass harvesting.
  • Understanding floc-forming microbial communities enhances bioflocculation efficiency.

Conclusions:

  • Microbial flocs are essential for biogeochemical cycles and biotechnological applications.
  • Further research into microbial interactions within flocs can improve bioflocculation processes.
  • Bioflocculation plays a significant role in both natural environments and engineered systems.