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New information on the growth analysis for different cassava genotypes grown under different irrigation managements during the early growth phase could support decision-making to improve crop productivity. This study aimed to determine the performance of 20 cassava genotypes grown under different irrigation management practices during the early growth phase. A strip-plot design with four replications was used during two growing seasons (2019/2020 and 2020/2021). Three levels of irrigation from 30 to 180 days after planting (DAP) were assigned as factor A (W1 = 100%, W2 = 60% and W3 = 20% of the crop water requirement), whereas 20 cassava genotypes were assigned as factor B. Crop data were recorded on SPAD chlorophyll meter reading (SCMR), specific leaf area (SLA) and leaf area index (LAI) at 180 and 330 DAP, relative growth rate (RGR) from 180 to 330 DAP and harvest index (HI) at 330 DAP. The genotypes CMR36-31-381 and Huay Bong 90 had high values of HI, indicating a good partitioning of photosynthate to the storage root. These two genotypes also showed superior performances in terms of SCMR, SLA and RGR inW2 and W3 treatments when compared to the other genotypes. They also had LAI values within the optimum range during the period of maximum canopy size. Therefore, the genotypes CMR36-31-381 and Huay Bong 90 could be used as genetic resources to improve cassava productivity under different irrigation levels.
Chapter 23 sets Goethe’s Farbenlehre (Theory of Colours) in context. Colour had been the subject of intensive study, both aesthetic and scientific, in the eighteenth century, and the chapter reconstructs the many influences on Goethe and his contemporaries, from the recent discoveries of Herschel and Ritter, to earlier figures, above all Newton, but even Aristotle and Hippocrates. The chapter also presents the central tenets of Goethe’s Farbenlehre, with a particular focus on the theoretical first part, which offers a physiological theory of colours and deals with the physical nature of light.
It was known from ancient times that vertigo was a malady and that the inner ears of animals contained an intricate network of structures named the labyrinth, whose function was unknown. The flourishing of human vestibular anatomy in the Renaissance period still adhered to age-old notions of traditional spiritual philosophy. In the post-Renaissance period, when science was being redefined and challenging these traditional thoughts, vestibular physiology was born. Started by Flourens, it gathered momentum with Hogyes, Goltz, Breuer, Mach, Crum Brown, Ewald, Brown Sequard and Baginsky in the 19th century. They discovered the role of the vestibular organ in sensing balance and the fine intricacies of vestibular physiology valid to this day. Ménière shattered the concept of traditional aetiology of vertigo and de Cyon challenged the Kantian concept of space. The science catapulted to the modern century. This article traces the history of these pioneers of vestibular physiology.
Colloid fluids are crystalloid electrolyte solutions with a macromolecule added that binds water by its colloid osmotic pressure. As macromolecules escape the plasma only with difficulty, the resulting plasma volume expansion is strong and lasts many hours. The clinically used colloid fluids include albumin, hydroxyethyl starch, gelatin, and dextran.
The plasma volume expansion shows one-compartment kinetics. Marketed iso-oncotic fluids are usually composed so that the infused volume expands the plasma volume by the infused amount. Exceptions include hyperoncotic variants such as 20% albumin.
The main indication for colloid fluid is as second-line treatment of hemorrhage. Because of inherent allergic properties, crystalloid electrolyte fluids should be used when the hemorrhage is small. A changeover to a colloid should be performed only when the crystalloid volume is so large that adverse effects may ensue. The only other clinical indication is that dextran can be prescribed to improve microcirculatory flow.
The body fluid spaces consist of the plasma, the interstitial fluid volume, and the intracellular fluid volume. The sizes of these spaces are tightly controlled by hormonal and neuronal mechanisms, but their size may be of interest to assess by scientific methods, as disturbances often occur in the wake of trauma and surgery.
A key approach is to use a tracer, by which the volume of distribution of an injected substance is measured after full distribution. Useful tracers must solely occupy a specific body fluid space. The volume effect of an infusion fluid can be calculated by applying a tracer method before and after the administration.
Guiding estimates of the sizes of the body volumes can be obtained by bioimpedance measurements and anthropometric equations.
The Hb concentration is a frequently used endogenous tracer of changes in blood volume. Hb is the inverse of the blood water concentration and Hb changes indicate the volume of distribution of an infused water volume. Volume kinetics is based on mathematical modeling of Hb changes over time, which, together with measurements of the urinary excretion, can be used to analyze and simulate the distribution and elimination of infusion fluids over time.
We will cover what is CPET and why we perform these tests.Exercise physiology will be explored with focus on oxygen consumption, the concept of the anaerobic threshold, and the Fick principle.
Contemporary biological and contextually based theoretical frameworks have conceptualized how stress exposure may influence adaptation in youth. However, nearly all of this scholarship neglects the role of specific contextual features and/or biological processes that are involved in ethnic-racial minority youth’s responses and adaptation to sociocultural stressors. Drawing on the theoretical principles of the developmental psychopathology framework and contemporary models of stress and adaptation, this article proposes a new multisystem model that explains how multiple levels and systems within and outside of individual youth influence their sociocultural adaptation. We provide empirical evidence to support components of this multisystem model. We propose that research based on our new theoretical framework will capture the sociocultural experiences of ethnic-racial minority youth by centering processes that are relevant to their lived experiences, coping, and adjustment. In doing so, this model will inform psychosocial interventions focused on promoting healthy adaptation among ethnic and racial diverse youth. Finally, we offer recommendations to guide future research on stress and adaptation among ethnic and racial diverse youth, in particular, and developmental psychopathology more broadly.
Edited by
Jeremy Koster, Max Planck Institute for Evolutionary Anthropology, Leipzig,Brooke Scelza, University of California, Los Angeles,Mary K. Shenk, Pennsylvania State University
Human behavioral ecology traditionally examines ultimate questions while “black boxing” physiological mechanisms and modes of inheritance. This chapter addresses how the intersection between human biology and behavioral ecology allows researchers to open these black boxes and how an examination of mechanisms can help to answer ultimate questions. First, the chapter discusses how physiological systems are intertwined with behavioral ones through chemical messengers, such as hormones, which broadcast information throughout the organism and coordinate actions inside the body with those outside the body. Next, the chapter looks inside the “black box of inheritance” to consider how mechanisms of inheritance beyond genes and culture, such as epigenetic inheritance, are relevant for behavioral ecology. The chapter concludes by discussing how studies of biology and behavioral ecology can complement and inform one another, leading to general insights that would be missed if both biology and behavior had not been considered in concert.
The reception of Wagner’s music as physically affecting, sound that manipulates the bodies of listeners, took place within a context of research into human and animal physiology. From reflex mechanisms to sense energies, the physiological response to art brought about new understandings of ‘physiological aesthetics’ in figures from Herbert Spencer to Thomas Huxley and Francis Galton, with a corresponding ‘physiological music theory’ applied by Ernst Mach and Hermann von Helmholtz. This led to various efforts at quantification of ear acuity and the role of the auditory nerve.
In the shadow of decadence, critical evaluation of works like Tristan and Tannhäuser traverse the spectrum from appreciation (‘bliss of the spinal cord’) to anxiousness (‘Wagner increases exhaustion’). Against these claims, Wagner’s numerous writings on sentience (Sinnlichkeit), rooted in Ludwig Feuerbach’s philosophy of perceptual realism, were directed towards topics as diverse as a theory of performance, the role of critics, and animal testing.
Over the last 30 years, child and family scholars and practitioners have increasingly recognized the foundational role of parental emotions in guiding parenting behaviors. This chapter delineates the ways in which parents’ emotional processes (including emotion regulation) are inextricably intertwined with even the quickest and most automatic parenting behaviors. We review the extant literature on parental emotion regulation, including studies of parents’ general emotion dysregulation, use of emotion regulation strategies, and emotion-related physiological processes during parent–child interaction. Throughout this review, we make note of leaps forward as well as remaining gaps in the science. Finally, we propose three major areas for the next phase of research linking parent emotion regulation and parenting behavior: (1) reframing our thinking away from general negative affect or dysregulation models and toward a consideration of specific emotions; (2) increasing attention to regulation of positively valenced emotions like joy, contentment, pride, and awe; and (3) embracing multimethod approaches that incorporate ecologically valid methodology.
This study examined how temporal associations between parents’ physiological and behavioral responses may reflect underlying regulatory difficulties in at-risk parenting. Time-series data of cardiac indices (second-by-second estimates of inter-beat intervals – IBI, and respiratory sinus arrhythmia – RSA) and parenting behaviors were obtained from 204 child welfare-involved parents (88% mothers, Mage = 32.32 years) during child-led play with their 3- to 7-year-old children (45.1% female; Mage = 4.76 years). Known risk factors for maltreatment, including parents’ negative social cognitions, mental health symptoms, and inhibitory control problems, were examined as moderators of intra-individual physiology-behavior associations. Results of ordinary differential equations suggested increases in parents’ cardiac arousal at moments when they showed positive parenting behaviors. In turn, higher arousal was associated with momentary decreases in both positive and negative parenting behaviors. Individual differences in these dynamic processes were identified in association with parental risk factors. In contrast, no sample-wide RSA-behavior associations were evident, but a pattern of increased positive parenting at moments of parasympathetic withdrawal emerged among parents showing more total positive parenting behaviors. This study illustrated an innovative and ecologically-valid approach to examining regulatory patterns that may shape parenting in real-time and identified mechanisms that should be addressed in interventions.
This chapter explores Galen’s ideas concerning the digestive-nutritive process. It focuses on his explanation of the motion of nutritive matter from its ingestion as food through its alteration into blood until its complete assimilation to the different body parts. The discussion follows its path inside the body from the mouth to the individual parts and describes the changes it undergoes in its different anatomical ‘stations’ and by what means it moves through these ‘stations’. In so doing it brings to light a fundamental but generally overlooked part of the digestive-nutritive process in Galen, namely physical motions of the parts such as the oesophagus, stomach and intestines. The chapter shows how these motions of contraction and extension actively and ‘mechanically’ move the nutritive matter into and through the body by pulling, pushing and compressing the parts of the body and the matter they hold inside them.
Philanthropic organizations experience difficulties in obtaining support from younger generations, highlighting the need for modern fundraising strategies. Advances in technology provide a potential solution by offering alternatives to traditional fundraising practices. In an experimental study in collaboration with the International Committee of the Red Cross (ICRC), we investigated whether virtual reality (VR) could be harnessed to innovate fundraising. We customized a VR module developed by the ICRC and tested its effectiveness at eliciting donations compared to that of an on-screen version of the experience. In addition, we explored mechanisms that might drive this effect, namely the level of interactivity (active/passive) and the type of affect elicited by the module (positive—happy ending/negative—tragic ending), as well as subjective perceptions and emotions related to the experience. Our findings showed that VR, compared with an on-screen experience, led to both an increase in incentivized donations and a larger reported propensity to become regular donors. Investigating the mechanisms that might drive the effect, we found that the VR experience led to stronger emotional feelings (notably being moved and sadness) and improved quality of the experience (e.g., level of interest and vividness). We further found physiological evidence showing a significant increase in arousal for the VR condition compared with the on-screen condition, although this was not correlated with an increase in donations. Taken together, our study provides evidence that VR could be a viable tool to innovate fundraising and identifies some of the features that may make this medium more effective than traditional practices.
Speech is anatomy made audible. Anatomy influences the possible human phonetic repertoire. Speech is an overlaid function, in the sense that all the “organs of speech” have more basic functions. Speech anatomy is divided into regions: supraglottal, the larynx, and subglottal organs. Subglottal organs are restricted to those that create a pulmonary breath stream for speech. The larynx produces a tone called voice, which is fundamental to speech production. The supraglottal organs comprise primarily the tongue, lips, and velopharyngeal port (soft palate). These vary the possible resonance frequencies, and thus contribute in a fundamental way to the variety of sounds typically generated in speech. The surface of the tongue is divided into regions for the purpose of phonetic classification. Speech production involves many individual muscles; muscles pull but do not push, except in the sense that, if a muscle contracts over its primary dimension, it will bulge on the sides. To produce speech sounds, the tongue often arches in the middle, and it often assumes a position with the tongue tip raised or curled back.
A central question in the study of mass extinction is whether these events simply intensify background extinction processes and patterns versus change the driving mechanisms and associated patterns of selectivity. Over the past two decades, aided by the development of new fossil occurrence databases, selectivity patterns associated with mass extinction have become increasingly well quantified and their differences from background patterns established. In general, differences in geographic range matter less during mass extinction than during background intervals, while differences in respiratory and circulatory anatomy that may correlate with tolerance to rapid change in oxygen availability, temperature, and pH show greater evidence of selectivity during mass extinction. The recent expansion of physiological experiments on living representatives of diverse clades and the development of simple, quantitative theories linking temperature and oxygen availability to the extent of viable habitat in the oceans have enabled the use of Earth system models to link geochemical proxy constraints on environmental change with quantitative predictions of the amount and biogeography of habitat loss. Early indications are that the interaction between physiological traits and environmental change can explain substantial proportions of observed extinction selectivity for at least some mass extinction events. A remaining challenge is quantifying the effects of primary extinction resulting from the limits of physiological tolerance versus secondary extinction resulting from the loss of taxa on which a given species depended ecologically. The calibration of physiology-based models to past extinction events will enhance their value in prediction and mitigation efforts related to the current biodiversity crisis.
What happens to productive continence after the turn of the twentieth century? The medical profession ceased to mention it as belief in the dangers of sex (and indeed, many of its actual risks) began to wane; but it never quite disappeared from the popular imagination. The Conclusion asks in what further directions the book’s work could be taken and proposes a particular relevance to studies of artistic ethics outside of Decadent literature, for instance, in the work of Henry James and Ezra Pound. It suggests that a similar approach to other texts and discourses can complicate and revitalize our approach to Victorian sexuality.
A 28-year-old nulligravida with known factor V Leiden mutation is referred by her primary care provider to your hospital center’s high-risk obstetrics unit for preconception counseling.