Trajectories Of Zooplankton Recovery In The Little Rock Lake Whole‐Lake Acidification Experiment

Understanding the factors that affect biological recovery from environmental stressors such as acidification is an important challenge in ecology. Here we report on zooplankton community recovery following the experimental acidification of Little Rock Lake, Wisconsin, USA. One decade following cessation of acid additions to the northern basin of Little Rock Lake (LRL), recovery of the zooplankton community was complete. Approximately 40% of zooplankton species in the lake exhibited a recovery lag in which biological recovery to reference basin levels was delayed by 1–6 yr after pH recovered to the level at which the species originally responded. Delays in recovery such as those we observed in LRL may be attributable to “biological resistance” wherein establishment of viable populations of key acid-sensitive species following water quality improvements is prevented by other components of the community that thrived during acidification. Indeed, we observed that the recovery of species that thrived during acidification tended to precede recovery of species that declined during acidification. In addition, correspondence analysis indicated that the zooplankton community followed different pathways during acidification and recovery, suggesting that there is substantial hysteresis in zooplankton recovery from acidification. By providing an example of a relatively rapid recovery from short-term acidification, zooplankton community recovery from experimental acidification in LRL generally reinforces the positive outlook for recovery reported for other acidified lakes

Expanding the phenotypic associations of globular glial tau subtypes

AbstractIntroductionClinicopathologic correlation in non-Alzheimer's tauopathies is variable, despite refinement of pathologic diagnostic criteria. In the present study, the clinical and neuroimaging characteristics of globular glial tauopathy (GGT) were examined to determine whether subtyping according to consensus guidelines improves clinicopathologic correlation.MethodsConfirmed GGT cases (n = 11) were identified from 181 frontotemporal tauopathy cases. Clinical and neuroimaging details were collected, and cases sub-typed according to the consensus criteria for GGT diagnosis. Relationships between clinical syndrome and GGT subtype were investigated.ResultsIn total, 11 patients (seven males, four females, mean age = 67.3 +/− 10.6 years) with GGT were included. Most, but not all, presented with behavioral variant frontotemporal dementia, but none had amyotrophic lateral sclerosis. Subtyping of GGT proved to be difficult and did not improve clinicopathologic correlation.DiscussionSub-classification of GGT pathology may be difficult and did not improve clinicopathologic correlation. Better biomarkers of tau pathology are needed

Biogenic non-crystalline U (IV) revealed as major component in uranium ore deposits

Historically, it is believed that crystalline uraninite, produced via the abiotic reduction of hexavalent uranium (U (VI)) is the dominant reduced U species formed in low-temperature uranium roll-front ore deposits. Here we show that non-crystalline U (IV) generated through biologically mediated U (VI) reduction is the predominant U (IV) species in an undisturbed U roll-front ore deposit in Wyoming, USA. Characterization of U species revealed that the majority (-1/458-89%) of U is bound as U (IV) to C-containing organic functional groups or inorganic carbonate, while uraninite and U (VI) represent only minor components. The uranium deposit exhibited mostly 238 U-enriched isotope signatures, consistent with largely biotic reduction of U (VI) to U (IV). This finding implies that biogenic processes are more important to uranium ore genesis than previously understood. The predominance of a relatively labile form of U (IV) also provides an opportunity for a more economical and environmentally benign mining process, as well as the design of more effective post-mining restoration strategies and human health-risk assessment.University of Wyomin

Prenatal development is linked to bronchial reactivity: epidemiological and animal model evidence

Chronic cardiorespiratory disease is associated with low birthweight suggesting the importance of the developmental environment. Prenatal factors affecting fetal growth are believed important, but the underlying mechanisms are unknown. The influence of developmental programming on bronchial hyperreactivity is investigated in an animal model and evidence for comparable associations is sought in humans. Pregnant Wistar rats were fed either control or protein-restricted diets throughout pregnancy. Bronchoconstrictor responses were recorded from offspring bronchial segments. Morphometric analysis of paraffin-embedded lung sections was conducted. In a human mother-child cohort ultrasound measurements of fetal growth were related to bronchial hyperreactivity, measured at age six years using methacholine. Protein-restricted rats' offspring demonstrated greater bronchoconstriction than controls. Airway structure was not altered. Children with lesser abdominal circumference growth during 11-19 weeks' gestation had greater bronchial hyperreactivity than those with more rapid abdominal growth. Imbalanced maternal nutrition during pregnancy results in offspring bronchial hyperreactivity. Prenatal environmental influences might play a comparable role in humans

Inclusive teaching circles : mechanisms for creating welcoming classrooms.

This essay examines the Inclusive Teaching Circle (ITC) as a mechanism for faculty development in creating instructional tools that embrace an inclusive pedagogy reflecting diversity, cultural competence and social justice. We describe one group’s year-long participation in an ITC at a large, metropolitan research university in the south. Next, we share several members’ strategies for promoting more inclusive and equitable learning for students in our classrooms. Finally, we consider the implications of ITCs for its group participants and the professorate at large

Measured solid state and subcooled liquid vapour pressures of nitroaromatics using Knudsen effusion mass spectrometry

Knudsen effusion mass spectrometry (KEMS) was used to measure the solid state saturation vapour pressure (PsatS) of a range of atmospherically relevant nitroaromatic compounds over the temperature range from 298 to 328 K. The selection of species analysed contained a range of geometric isomers and differing functionalities, allowing for the impacts of these factors on saturation vapour pressure (Psat) to be probed. Three subsets of nitroaromatics were investigated: nitrophenols, nitrobenzaldehydes and nitrobenzoic acids. The PsatS values were converted to subcooled liquid saturation vapour pressure (PsatL) values using experimental enthalpy of fusion and melting point values measured using differential scanning calorimetry (DSC). The PsatL values were compared to those estimated by predictive techniques and, with a few exceptions, were found to be up to 7 orders of magnitude lower. The large differences between the estimated PsatL and the experimental values can be attributed to the predictive techniques not containing parameters to adequately account for functional group positioning around an aromatic ring, or the interactions between said groups. When comparing the experimental PsatS of the measured compounds, the ability to hydrogen bond (H bond) and the strength of the H bond formed appear to have the strongest influence on the magnitude of the Psat, with steric effects and molecular weight also being major factors. Comparisons were made between the KEMS system and data from diffusion-controlled evaporation rates of single particles in an electrodynamic balance (EDB). The KEMS and the EDB showed good agreement with each other for the compounds investigated

Ultra-rapid development and deployment of a family resilience program during the COVID-19 pandemic: Lessons learned from Families Tackling Tough Times Together

The 2020 COVID-19 pandemic brought uncertainty, anxiety, and stress into households; however, it also created an opportunity as many families, sequestered at home, found themselves spending much more time together. To support families and improve their ability to cope, recover, and build resilience amid the pandemic, Purdue University’s College of Health and Human Sciences (HHS) launched Families Tackling Tough Times Together (FT), a strength-based multi-week online program informed by scientific evidence about family resilience. Offered through a Facebook group, FT targeted parents or caregivers, children, youth, young adults, older adults, and helping professionals serving families. FT was designed to appeal to both military and civilian families, in part because both groups were experiencing similar challenges associated with the pandemic. This was not only an opportunity to bring civilian and military families together, but also for civilian families to learn from the experiences of military families in surmounting significant challenges. This article describes the development and implementation of the FT program, as well as lessons learned. Strategies highlighted in this article may be helpful to researchers or practitioners who wish to implement a rapid-response intervention aimed at building family resilience

Examining Long‐Term Effects Of An Infant Mental Health Home‐Based Early Head Start Program On Family Strengths And Resilience

Infant Mental Health based interventions aim to promote the healthy development of infants and toddlers through promoting healthy family functioning to foster supportive relationships between the young child and his or her important caregivers. This study examined impacts of an Infant Mental Health home‐based Early Head Start (IMH‐HB EHS) program on family functioning. The sample includes 152 low‐income families in the Midwestern United States, expectant or parenting a child younger than 1 year of age, who were randomly assigned to receive IMH‐HB EHS services (n = 75) or to a comparison condition (n = 77). Mothers who received IMH‐HB EHS services reported healthier psychological and family functioning, outcomes that are consistent with the IMH focus, when their children were between the ages of 3 and 7 years of age. Specifically, mothers in the IMH‐HB EHS group reported healthier family functioning and relationships, better coping skills needed to advocate for their families, and less stress in the parenting role versus those in the comparison condition. The study also examined support seeking coping, some of which changed differently over time based on program group assignment. Overall, findings suggest that the gains families achieve from participating in IMH‐HB EHS services are maintained after services cease.RESUMENLa meta de las intervenciones con base en la salud mental infantil es promover el desarrollo sano de infantes y bebés por medio de promover un funcionamiento familiar sano para adoptar relaciones de apoyo entre el pequeño niño y sus importantes cuidadores. Este estudio examinó el impacto que sobre el funcionamiento familiar tiene un programa “Early Head Start” de salud mental infantil con base en casa (IMH‐HB EHS). El grupo muestra lo componen 152 familias de bajos recursos del Medio Oeste de Estados Unidos, en espera de o ya criando a un niño menor de un año de edad, que fueron asignadas al azar para recibir los servicios de IMH‐HB EHS (n=75) o a una condición comparativa (n=77). Las madres que recibieron los servicios de IMH‐HB EHS reportaron un funcionamiento sicológico y familiar más saludable, resultados que son consistentes con el enfoque de IMH, cuando sus niños tenían entre 3 y 7 años de edad. Específicamente, las madres en el grupo IMH‐HB EHS reportaron un funcionamiento y relaciones familiares más saludables, mejores habilidades para arreglárselas que eran necesarias para abogar por sus familias, así como menos estrés en el papel de crianza al ser comparadas con aquellas madres en la condición comparativa. El estudio también examinó la manera de arreglárselas buscando apoyo, algunas de las cuales cambiaron diferentemente a través del tiempo con base en las asignaciones de grupo del programa. En general, los resultados sugieren que los aspectos positivos que las familias alcanzan como resultado de participar en los servicios de IMH‐HB EHS se mantienen después que los servicios terminan.RÉSUMÉLes interventions fondées sur la santé mentale ont pour but de promouvoir le développement sain des nourrissons et des jeunes enfants en promouvant le fonctionnement saind'une famille afin de favoriser des relations de soutien entre le jeune enfant et ceux qui s'occupent d'elle ou de lui. Cette étude a examiné les impacts d'un programme américain de Early Head Start focalisé sur la santé mentale du nourrisson (abrégé IMH‐HB EHS) sur le fonctionnement de la famille. L’échantillon a compris 152 familles de milieu défavorisé de la région centre des Etats‐Unis, attendant un enfant ou s'occupant d'un enfant de moins d'un an, a qui on a assigné au hasard les services IMH‐HB EHS (n=75) ou une condition de comparaison (n=77). Les mères ayant reçu les services IMH‐HB EHS ont fait état d'un meilleur fonctionnement psychologique et familial, des résultats qui correspondent à l'objectif de santé mentale du nourrisson, lorsque leurs enfants avaient entre 3 et 7 ans. Plus spécifiquement, les mères du groupe IMH‐HB EHS ont fait état d'un meilleur fonctionnement familial et de meilleurs relations familiales, de meilleures capacités à s'adapter nécessaires afin de se porter les avocates de leurs familles, et de moins de stress de parentage comparé à celles du groupe de comparaison. L’étude a aussi examiné l'adaptation liée à la quête de soutien, qui a en partie changé différemment au fil du temps, en fonction du groupe de placement. Au bout du compte les résultats suggèrent que les gains obtenus par les familles comme résultat de la participation aux services du IMH‐HB EHS se maintiennent après que les services cessent.ZUSAMMENFASSUNGInterventionen, die auf der mentalen Gesundheit von Säuglingen basieren, zielen darauf ab, die gesunde Entwicklung von Säuglingen und Kleinkindern zu verbessern, indem ein gesundes familiäres Funktionieren gefördert wird, um unterstützende Beziehungen zwischen dem Kleinkind und ihren/seinen wichtigsten Bezugspersonen zu begünstigen. Diese Studie untersuchte die Effekte eines Early Head Start‐Hausbesuchs‐Programms (IMH‐HB EHS) auf das familiäre Funktionieren. Die Stichprobe umfasst 152 Familien mit niedrigem Einkommen aus dem Mittleren Westen der USA. Es handelt sich bei der Stichprobe um werdende Eltern oder Eltern mit einem Kind unter einem Jahr, die randomisiert einer Dienstleistung zugewiesen wurden: zum IMH‐HB EHS‐Programm (n = 75) oder zu einer Vergleichsbedingung (n = 77). Mütter, die das IMH‐HB EHS‐Programm erhielten, berichteten von gesünderem psychologischem und familiärem Funktionieren, wenn ihre Kinder im Alter zwischen 3 und 7 Jahren waren. Dies sind Ergebnisse, die mit dem IMH Fokus übereinstimmen. Im Speziellen berichteten Mütter, die in der IMH‐HB EHS‐Gruppe waren, von gesünderem familiären Funktionieren und familiären Beziehungen, besseren Bewältigungsstrategien, um für ihre Familien einzustehen und von weniger Stress in der Elternrolle verglichen mit den Müttern der Vergleichsbedingung. Die Studie untersuchte auch unterstützungssuchende Bewältigungsstrategien, von denen sich einige basierend auf der Gruppenzugehörigkeit im Laufe der Zeit in unterschiedlicher Weise veränderten. Insgesamt deuten die Ergebnisse darauf hin, dass die Gewinne, die die Familien infolge der Teilnahme am IMH‐HB EHS‐Programm erzielten, nach Ende des Programms aufrechterhalten werden.抄録乳幼児精神保健に基づく介入は、幼い子どもとその重要な養育者との間の支持的な関係性を育てるという健康な家族機能の促進を通して、乳幼児の健康な発達を促進することを目的としている。この研究は、乳幼児精神保健在宅早期ヘッドスタートInfant Mental Health home‐based Early Head Start (IMH‐HB EHS)プログラムが、家族機能に与える影響を調査した。対象はアメリカ合衆国中西部の妊娠中か1歳以下の子どもを育てている152の低所得家族で、IMH‐HB EHSサービスを受ける(n=75)か、比較の条件か(n=77)に、ランダムに割り当てられた。IMH‐HB EHSサービスを受けた母親は、子どもが3歳から7歳の間に、より健康的な心理機能および家族機能を報告した。これはIMHの焦点と一致している結果だった。特に、IMH‐HB EHS群の母親は、比較条件の母親と比べ、より健康な家族機能と関係性、家族を擁護するのに必要なよりよい対処機能、そして親役割にストレスが少ないことを報告した。研究はまた、支援を求める対処についても調査した。その一部はプログラム群への割り当てに基づいて時間経過により異なって変化していた。全体として、IMH‐HB EHSサービスに参加した結果として家族が達成し獲得したものは、サービスが終了した後も、維持されている。摘要以幼兒心理健康為基礎的介入旨在通過健康的家庭運作去培養小童與其重要看護者間的支持性關係, 以此促進幼兒和學步兒的健康發展。本文探討一個幼兒心理健康家訪早期搶步計畫 (IMH‐HB‐EHS) 對家庭運作的影響。樣本包括一百五十二個在美國中西部低入息的家庭。這些家庭正待產或在養育一個少於一歲的小孩。參與家庭被隨機分派到接受IMH‐HB‐EHS服務 (n=75) 或一個比較環境 (n=77)。有接受IMH‐HB‐EHS服務的母親報告在孩兒三至七歲間有較健康的心理和家庭運作, 這結果與IMH的焦點相附合。具體來說, 在IMH‐HB‐EHS組的母親較在比較環境組的母親報告有健康些的家庭運作和關係, 有好些的因應技巧為家庭作鼓吹, 及在親職角色中有少些壓力。本文亦探討尋求支持的因應, 發現這會根據組別分派而有不同的隨時間改變。總體而言, 探討結果顯示家庭從參與IMH‐HB‐EHS服務所得的收益在服務停止後仍會維持。Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/112230/1/imhj21518.pd

On Singularity Formation of a Nonlinear Nonlocal System

We investigate the singularity formation of a nonlinear nonlocal system. This nonlocal system is a simplified one-dimensional system of the 3D model that was recently proposed by Hou and Lei in [13] for axisymmetric 3D incompressible Navier-Stokes equations with swirl. The main difference between the 3D model of Hou and Lei and the reformulated 3D Navier-Stokes equations is that the convection term is neglected in the 3D model. In the nonlocal system we consider in this paper, we replace the Riesz operator in the 3D model by the Hilbert transform. One of the main results of this paper is that we prove rigorously the finite time singularity formation of the nonlocal system for a large class of smooth initial data with finite energy. We also prove the global regularity for a class of smooth initial data. Numerical results will be presented to demonstrate the asymptotically self-similar blow-up of the solution. The blowup rate of the self-similar singularity of the nonlocal system is similar to that of the 3D model.Comment: 28 pages, 9 figure

Remote environmental monitoring units : An autonomous vehicle for characterizing coastal environments

Author Posting. © American Meteorological Society 2005. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Atmospheric and Oceanic Technology 22 (2005): 1797–1808, doi:10.1175/JTECH1809.1.In oceanography, there has been a growing emphasis on coastal regions, partially because of their inherent complexity, as well as the increasing acknowledgment of anthropogenic impacts. To improve understanding and characterization of coastal dynamics, there has been significant effort devoted to the development of autonomous systems that sample the ocean on relevant scales. Autonomous underwater vehicles (AUVs) are especially well suited for studies of the coastal ocean because they are able to provide near-synoptic spatial observations. These sampling platforms are beginning to transition from the engineering groups that developed and continue to improve them to the science user. With this transition comes novel applications of these vehicles to address new questions in coastal oceanography. Here, the relatively mature Remote Environmental Monitoring Units (REMUS) AUV system is described and assessed. Analysis of data, based on 37 missions and nearly 800 km of in-water operation, shows that the vehicle’s navigational error estimates were consistently less than 10 m, and error estimates of mission duration, distance, velocity, and power usage, once the vehicle was properly ballasted, were below 10%. An example of the transition to science is demonstrated in an experiment conducted in 2002 in Monterey Bay, California, where the vehicle was used to quantify critical horizontal length scales of variability. Length scales on the order of tens to hundreds of meters were found for the region within 25 km of the coastline, which has significant implications for designing proper sampling approaches and parameterizing model domains. Results also demonstrate the overall utility of the REMUS vehicle for use by coastal oceanographers.This work was supported by the Office of Naval Research (N00014-00-1- 0570 and N00014-03-1-0341 to M. Moline)