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Regulation theory

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https://www.readbyqxmd.com/read/28324651/line-activity-of-ganglioside-gm1-regulates-raft-size-distribution-in-a-cholesterol-dependent-manner
#1
Timur R Galimzyanov, Anna S Lyushnyak, Veronika V Aleksandrova, Liudmila A Shilova, Ilya I Mikhalyov, Irina M Molotkovskaya, Sergey A Akimov, Oleg V Batishchev
Liquid-ordered lipid domains, also called rafts, are assumed to be important players in different cellular processes, mainly signal transduction and membrane trafficking. They are thicker than the disordered part of the membrane and are thought to form for compensating the hydrophobic mismatch between transmembrane proteins and lipid environment. Despite the existence of such structures in vivo is still an open question, they are observed in model systems of multicomponent lipid bilayers. Moreover, the predictions obtained from model experiments allow explaining different physiological processes possibly involving rafts...
March 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28323405/oxygen-vacancy-enables-markedly-enhanced-magnetic-resonance-imaging-guided-photothermal-therapy-of-a-gd3-doped-contrast-agent
#2
Dalong Ni, Jiawen Zhang, Jing Wang, Ping Hu, Yingying Jin, Zhongmin Tang, Zhenwei Yao, Wenbo Bu, Jianlin Shi
The Gd3+-based contrast agents (CAs) are the most prevailing and widely used for enhanced magnetic resonance imaging (MRI). Numbers of approaches have been developed to regulate the key parameters in order to obtain high-relaxivity CAs, according to the classic Solomon-Bloembergen-Morgen theory. Herein, a method of controlling oxygen vacancies in inorganic nanosized CAs has been developed for largely accelerated proton relaxation to obtain a high r1 value. Such a strategy is verified on oxygen-deficient PEG-NaxGdWO3 nanorods, which exhibit remarkable r1 value up to 80 mM-1s-1 (at 0...
March 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28318503/sociotechnical-systems-as-a-framework-for-regulatory-system-design-and-evaluation-using-work-domain-analysis-to-examine-a-new-regulatory-system
#3
Tony Carden, Natassia Goode, Gemma J M Read, Paul M Salmon
Like most work systems, the domain of adventure activities has seen a series of serious incidents and subsequent calls to improve regulation. Safety regulation systems aim to promote safety and reduce accidents. However, there is scant evidence they have led to improved safety outcomes. In fact there is some evidence that the poor integration of regulatory system components has led to adverse safety outcomes in some contexts. Despite this, there is an absence of methods for evaluating regulatory and compliance systems...
March 15, 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28315113/-i-d-been-like-freaking-out-the-whole-night-exploring-emotion-regulation-based-on-junior-doctors-narratives
#4
Robert M Lundin, Kiran Bashir, Alison Bullock, Camille E Kostov, Karen L Mattick, Charlotte E Rees, Lynn V Monrouxe
The importance of emotions within medical practice is well documented. Research suggests that how clinicians deal with negative emotions can affect clinical decision-making, health service delivery, clinician well-being, attentiveness to patient care and patient satisfaction. Previous research has identified the transition from student to junior doctor (intern) as a particularly challenging time. While many studies have highlighted the presence of emotions during this transition, how junior doctors manage emotions has rarely been considered...
March 17, 2017: Advances in Health Sciences Education: Theory and Practice
https://www.readbyqxmd.com/read/28314502/nutrient-sensing-and-the-oxidative-stress-response
#5
REVIEW
Hanzhi Luo, Hou-Hsien Chiang, Makensie Louw, Albert Susanto, Danica Chen
The simplicity and effectiveness of calorie restriction (CR) in lifespan and healthspan extension have fascinated generations searching for the Fountain of Youth. CR reduces levels of oxidative stress and damage, which have been postulated in the free radical theory of aging as a major cause of aging and diseases of aging. This reduction has long been viewed as a result of passive slowing of metabolism. Recent advances in nutrient sensing have provided molecular insights into the oxidative stress response and suggest that CR triggers an active defense program involving a cascade of molecular regulators to reduce oxidative stress...
March 14, 2017: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/28303789/flatness-based-control-approach-to-drug-infusion-for-cardiac-function-regulation
#6
Gerasimos Rigatos, Nikolaos Zervos, Alexey Melkikh
A new control method based on differential flatness theory is developed in this study, aiming at solving the problem of regulation of haemodynamic parameters. Actually control of the cardiac output (volume of blood pumped out by heart per unit of time) and of the arterial blood pressure is achieved through the administered infusion of cardiovascular drugs such as dopamine and sodium nitroprusside. Time delays between the control inputs and the system's outputs are taken into account. Using the principle of dynamic extension, which means that by considering certain control inputs and their derivatives as additional state variables, a state-space description for the heart's function is obtained...
February 2017: IET Systems Biology
https://www.readbyqxmd.com/read/28301510/investigation-on-law-and-economics-of-listed-companies-financing-preference-based-on-complex-network-theory
#7
Jian Yang, Shuying Bai, Zhao Qu, Hui Chang
In this paper, complex network theory is used to make time-series analysis of key indicators of governance structure and financing data. We analyze scientific listed companies' governance data from 2010 to 2014 and divide them into groups in accordance with the similarity they share. Then we select sample companies to analyze their financing data and explore the influence of governance structure on financing decision and the financing preference they display. This paper reviews relevant laws and regulations of financing from the perspective of law and economics, then proposes reasonable suggestions to consummate the law for the purpose of regulating listed companies' financing...
2017: PloS One
https://www.readbyqxmd.com/read/28301202/the-structure-of-common-emotion-regulation-strategies-a-meta-analytic-examination
#8
Kristin Naragon-Gainey, Tierney P McMahon, Thomas P Chacko
Emotion regulation has been examined extensively with regard to important outcomes, including psychological and physical health. However, the literature includes many different emotion regulation strategies but little examination of how they relate to one another, making it difficult to interpret and synthesize findings. The goal of this meta-analysis was to examine the underlying structure of common emotion regulation strategies (i.e., acceptance, behavioral avoidance, distraction, experiential avoidance, expressive suppression, mindfulness, problem solving, reappraisal, rumination, worry), and to evaluate this structure in light of theoretical models of emotion regulation...
April 2017: Psychological Bulletin
https://www.readbyqxmd.com/read/28301158/amino-acid-functionalization-of-doped-single-walled-carbon-nanotubes-effects-of-dopants-and-side-chains-as-well-as-zwitterionic-stabilizations
#9
Lisha Jiang, Chang Zhu, Yu-Jie Fu, Gang Yang
Functionalization of single-walled carbon nanotubes (SWCNTs) is necessitated in a number of conditions such as drug delivery, and here amino acid functionalization of SWCNTs is conducted within the framework of density functional theory. Functionalization efficiencies of Gly are largely determined by dopants, as a combined effect of atomic radius, electronic configuration and distortion to SWCNTs. Different functionalization sites in Gly have divergent interaction strengths with M/SWCNTs that decline as Ob > N > Oa, and this trend seems almost independent of the identity of metallic dopants...
March 16, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28298094/fcs-experiments-to-quantify-ca-2-diffusion-and-its-interaction-with-buffers
#10
Lorena Sigaut, Cecilia Villarruel, Silvina Ponce Dawson
Ca(2+) signals are ubiquitous. One of the key factors for their versatility is the variety of spatio-temporal distributions that the cytosolic Ca(2+) can display. In most cell types Ca(2+) signals not only depend on Ca(2+) entry from the extracellular medium but also on Ca(2+) release from internal stores, a process which is in turn regulated by cytosolic Ca(2+) itself. The rate at which Ca(2+) is transported, the fraction that is trapped by intracellular buffers, and with what kinetics are thus key features that affect the time and spatial range of action of Ca(2+) signals...
March 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28295309/personality-traits-hierarchically-organized-systems
#11
Małgorzata Fajkowska
Personality science has always been and is still ready for new theorizing on traits. Accordingly, this paper presents the recently proposed Traits as Hierarchical Systems (THS) model, where personality traits are not only the emergent properties of the three-level hierarchy of the personality system, but are also hierarchical per se. As hierarchical systems, they are organized into three levels: mechanisms and processes, structures, and behavioral markers. In this approach trait denotes the underlying, recurrent mechanisms that pattern its structure and account for the stability/variability of individual characteristics...
March 13, 2017: Journal of Personality
https://www.readbyqxmd.com/read/28293209/toward-a-glossary-of-self-related-terms
#12
REVIEW
Alain Morin
Some scholars have noted that an impressive number of self-related terms have been gradually introduced in the scientific literature. Several of these terms are either ill-defined or synonymous, creating confusion, and redundancy. In an effort to minimize this problem, I present a novel and systematic way of looking at possible relations between several key self-terms. I also propose a tentative classification scheme of self-terms as follows: (1) basic terms related to the overall process of self-perception (e...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28292833/mesoscale-architecture-shapes-initiation-and-richness-of-spontaneous-network-activity
#13
Samora Okujeni, Steffen Kandler, Ulrich Egert
Spontaneous activity in the absence of external input, including propagating waves of activity, is a robust feature of neuronal networks in vivo and in vitro. The neurophysiological and anatomical requirements for initiation and persistence of such activity, however, are poorly understood, as is their role in the function of neuronal networks. Computational network studies indicate that clustered connectivity may foster the generation, maintenance and richness of spontaneous activity. Since this mesoscale architecture cannot be systematically modified in intact tissue, testing these predictions is impracticable in vivo...
March 14, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28290269/trajectories-of-child-externalizing-problems-between-ages-3-and-10-years-contributions-of-children-s-early-effortful-control-theory-of-mind-and-parenting-experiences
#14
Sheryl L Olson, Daniel Ewon Choe, Arnold J Sameroff
Preventing problem behavior requires an understanding of earlier factors that are amenable to intervention. The main goals of our prospective longitudinal study were to trace trajectories of child externalizing behavior between ages 3 and 10 years, and to identify patterns of developmentally significant child and parenting risk factors that differentiated pathways of problem behavior. Participants were 218 3-year-old boys and girls who were reassessed following the transition to kindergarten (age 5-6 years) and during the late school-age years (age 10)...
March 14, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28290008/three-dimensional-numerical-simulations-of-biofilm-dynamics-with-quorum-sensing-in-a-flow-cell
#15
Jia Zhao, Qi Wang
We develop a multiphasic hydrodynamic theory for biofilms taking into account interactions among various bacterial phenotypes, extracellular polymeric substance (EPS), quorum sensing (QS) molecules, solvent, and antibiotics. In the model, bacteria are classified into down-regulated QS, up-regulated QS, and non-QS cells based on their QS ability. The model is first benchmarked against an experiment yielding an excellent fit to experimental measurements on the concentration of QS molecules and the cell density during biofilm development...
March 13, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28287099/double-stranded-rna-virus-outer-shell-assembly-by-bona-fide-domain-swapping
#16
Zhaoyang Sun, Kamel El Omari, Xiaoyu Sun, Serban L Ilca, Abhay Kotecha, David I Stuart, Minna M Poranen, Juha T Huiskonen
Correct outer protein shell assembly is a prerequisite for virion infectivity in many multi-shelled dsRNA viruses. In the prototypic dsRNA bacteriophage φ6, the assembly reaction is promoted by calcium ions but its biomechanics remain poorly understood. Here, we describe the near-atomic resolution structure of the φ6 double-shelled particle. The outer T=13 shell protein P8 consists of two alpha-helical domains joined by a linker, which allows the trimer to adopt either a closed or an open conformation. The trimers in an open conformation swap domains with each other...
March 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/28284792/screening-of-the-optimized-prescription-from-suqingwan-in-terms-of-its-therapeutic-effect-on-dss-induced-ulcerative-colitis-by-its-regulation-of-inflammatory-and-oxidative-mediators
#17
Jingxuan Shao, Zhihui Liu, Lin Wang, Zehai Song, Hang Chang, Na Han, Jun Yin
ETHNOPHARMACOLOGICAL RELEVANCE: Suqingwan (SQW), a traditional Chinese medicine used for treating ulcerative colitis (UC), is composed of 13 kinds of Traditional Chinese medicines (TCMs). According to TCM theory, we investigated whether a simplified prescription composed of the herbs with some functions, would have similar effects to SQW and examined its potential treatment mechanism of action. MATERIALS AND METHODS: We categorized the herbs in SQW into four groups according to their traditional functions and used an orthogonal experimental design to obtain nine separated prescriptions (SPs) of SQW...
March 8, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28283301/can-we-trust-what-parents-tell-us-a-systematic-review
#18
REVIEW
Paul L P Brand, Sandra van Dulmen
Taking a history is a key diagnostic instrument in paediatric consultations. Numerous issues potentially reduce the history's reliability. Therefore, paediatricians have always expressed ambivalence regarding history taking from parents, both valuing and distrusting it. In this review, we describe how parents build and present a description of their child's health issues in the conceptual framework of self-regulation theory. We performed a systematic review on the literature on the reliability of history taking...
February 9, 2017: Paediatric Respiratory Reviews
https://www.readbyqxmd.com/read/28280737/bioinformatics-study-of-structural-patterns-in-plant-microrna-precursors
#19
J Miskiewicz, K Tomczyk, A Mickiewicz, J Sarzynska, M Szachniuk
According to the RNA world theory, RNAs which stored genetic information and catalyzed chemical reactions had their contribution in the formation of current living organisms. In recent years, researchers studied this molecule diversity, i.a. focusing on small non-coding regulatory RNAs. Among them, of particular interest is evolutionarily ancient, 19-24 nt molecule of microRNA (miRNA). It has been already recognized as a regulator of gene expression in eukaryotes. In plants, miRNA plays a key role in the response to stress conditions and it participates in the process of growth and development...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28280691/old-game-new-players-linking-classical-theories-to-new-trends-in-transplant-immunology
#20
REVIEW
Marina Burgos da Silva, Flavia Franco da Cunha, Fernanda Fernandes Terra, Niels Olsen Saraiva Camara
The evolutionary emergence of an efficient immune system has a fundamental role in our survival against pathogenic attacks. Nevertheless, this same protective mechanism may also establish a negative consequence in the setting of disorders such as autoimmunity and transplant rejection. In light of the latter, although research has long uncovered main concepts of allogeneic recognition, immune rejection is still the main obstacle to long-term graft survival. Therefore, in order to define effective therapies that prolong graft viability, it is essential that we understand the underlying mediators and mechanisms that participate in transplant rejection...
February 24, 2017: World Journal of Transplantation
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