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"Martin, O."
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Maize germplasm chronosequence shows crop breeding history impacts recruitment of the rhizosphere microbiome
Recruitment of microorganisms to the rhizosphere varies among plant genotypes, yet an understanding of whether the microbiome can be altered by selection on the host is relatively unknown. Here, we performed a common garden study to characterize recruitment of rhizosphere microbiome, functional groups, for 20 expired Plant Variety Protection Act maize lines spanning a chronosequence of development from 1949 to 1986. This time frame brackets a series of agronomic innovations, namely improvements in breeding and the application of synthetic nitrogenous fertilizers, technologies that define modern industrial agriculture. We assessed the impact of chronological agronomic improvements on recruitment of the rhizosphere microbiome in maize, with emphasis on nitrogen cycling functional groups. In addition, we quantified the microbial genes involved in nitrogen cycling and predicted functional pathways present in the microbiome of each genotype. Both genetic relatednesses of host plant and decade of germplasm development were significant factors in the recruitment of the rhizosphere microbiome. More recently developed germplasm recruited fewer microbial taxa with the genetic capability for sustainable nitrogen provisioning and larger populations of microorganisms that contribute to N losses. This study indicates that the development of high-yielding varieties and agronomic management approaches of industrial agriculture inadvertently modified interactions between maize and its microbiome.
Journal Article
كي تصبح معلما أفضل : ثمانية أساليب جديدة ناجحة
إذا أردت أن تكون معلما ناجحا متمكنا في عملك المهني اقرأ هذا الكتاب فهو يقدم للمعلمين من مرحلة رياض الأطفال وحتى نهاية المرحلة الثانوية معلومات أساسية حول بعض أهم الأدوات التعليمية والتعلمية التي توصل إليها المربون في الوقت الحاضر، يتضمن هذا الكتاب ثمانية أساليب أو مبتكرات تعليمية استخدمها المربون أثناء عملهم في التعليم وأثبتت فاعليتها القصوى في تحسين تعلم الطلاب. من فصول هذا الكتاب تقرأ عن: الأسئلة الرئيسية في غرفة الصف،. المنهاج التكاملي، المنهاج القائم على المعايير، التقويم الحقيقي، محكات مستوى الأداء، حقيبة نمو التعلم (بورتفوليو)، المراجعة والتأمل، البحث الإجرائي. كتاب لا غنى عنه لكل معلم يرغب في تحسين أدائه وأداء طلابه.
BOOK
Advances in Nanotechnology towards Development of Silver Nanoparticle-Based Wound-Healing Agents
Since antiquity, silver-based therapies have been used in wound healing, wound care and management of infections to provide adequate healing. These therapies are associated with certain limitations, such as toxicity, skin discolouration and bacterial resistance, which have limited their use. As a result, new and innovative wound therapies, or strategies to improve the existing therapies, are sought after. Silver nanoparticles (AgNPs) have shown the potential to circumvent the limitations associated with conventional silver-based therapies as described above. AgNPs are effective against a broad spectrum of microorganisms and are less toxic, effective at lower concentrations and produce no skin discolouration. Furthermore, AgNPs can be decorated or coupled with other healing-promoting materials to provide optimum healing. This review details the history and impact of silver-based therapies leading up to AgNPs and AgNP-based nanoformulations in wound healing. It also highlights the properties of AgNPs that aid in wound healing and that make them superior to conventional silver-based wound treatment therapies.
Journal Article
Opportunity costs and the response of birds and mammals to climate warming
As global temperatures reach record highs, threats posed by climate change to biodiversity become ever more severe. For endotherms, maintaining body temperature within safe bounds is fundamental for performance and survival. Animals routinely modify their behavior to buffer physiological impacts of high temperatures (eg ceasing activity, seeking shade). However, this can impose substantial costs related to missed opportunities to engage in other important activities, with potentially large but often overlooked consequences for survival and reproduction. Here, we outline behavioral trade-offs birds and mammals face in navigating thermal landscapes and associated challenges of balancing energy, water, and time budgets; review the rapidly expanding knowledge in this field; and summarize examples – across taxa – of fitness costs during hot weather. We argue that a shift is needed in evaluating the impacts of heat on birds and mammals, and that fitness costs of missed opportunities must be explicitly integrated into climate-change vulnerability frameworks.
Journal Article
Pseudomonas guariconensis Necrotizing Fasciitis, United Kingdom
We describe a case of necrotizing fasciitis in the United Kingdom in which Pseudomonas guariconensis was isolated from multiple blood culture and tissue samples. The organism carried a Verona integron-encoded metallo-β-lactamase gene and evidence of decreased susceptibility to β-lactam antimicrobial agents. Clinicians should use caution when treating infection caused by this rare pathogen.
Journal Article
Happy together : using the science of positive psychology to build love that lasts
\"In fairy tales, lasting love just happens. But in real life, healthy habits are whatbuild happiness over the long haul. Happy Together, written by positive psychology experts and husband-and-wife team Suzann Pileggi Pawelski and James O. Pawelski, is the first book on using the principles of positive psychology to create thriving romantic relationships. Combining extensive scientific research and real-life examples, this book will help you find and feed the good in yourself and your partner. You will learn to develop key habits for building and sustaining long-term love by: - Promoting a healthy passion - Prioritizing positive emotions - Mindfully savoring experiences together - Seeking out strengths in each other Through easy-to-follow methods and fun exercises, you'll learn to strengthen your partnership, whether you're looking to start a relationship off on the right foot, weather difficult times, reignite passion, or transform a good marriage into a great one\" -- Provided by publishers.
Book
Review: Geothermal heat as a tracer of large-scale groundwater flow and as a means to determine permeability fields
A review of coupled groundwater and heat transfer theory is followed by an introduction to geothermal measurement techniques. Thereafter, temperature-depth profiles (geotherms) and heat discharge at springs to infer hydraulic parameters and processes are discussed. Several studies included in this review state that minimum permeabilities of approximately 5 × 10⁻¹⁷ < k min <10⁻¹⁵ m² are required to observe advective heat transfer and resultant geotherm perturbations. Permeabilities below k min tend to cause heat-conduction-dominated systems, precluding inversion of temperature fields for groundwater flow patterns and constraint of permeabilities other than being
Journal Article