Variable impact of compost on phosphorus dynamics in organic dryland soils following a one‐time application

2021 ◽  
Author(s):  
Idowu Atoloye ◽  
Astrid Jacobson ◽  
Earl Creech ◽  
Jennifer Reeve
Keyword(s):  
Phosphorus Dynamics ◽  
Variable Impact

scholarly journals The Impact and Implications of The COVID-19 Pandemic on Organ Procurement Outside of an Epicenter

2021 ◽  
pp. 152692482110028
Author(s):  
Janice Jene Hudgins ◽  
Allison Jo Boyer ◽  
Kristen Danielle Orr ◽  
Clint Allen Hostetler ◽  
Jeffrey Paul Orlowski ◽  
...  
Keyword(s):  
Health Care ◽  
Initial Phase ◽  
Organ Procurement ◽  
Health Care Systems ◽  
Health Data ◽  
Organ Procurement Organization ◽  
Care Systems ◽  
The Impact ◽  
Variable Impact ◽  
Single Organ

The COVID-19 pandemic has been well-documented to have a variable impact on individual communities and health care systems. We describe the experience of a single organ procurement organization (OPO), located in an area without a large cluster of cases during the initial phase of the COVID-19 pandemic. A review of community health data describing the impact of COVID-19 nationally and in Oklahoma was conducted. Additionally, a retrospective review of available OPO data from March 2019-May 2020 was performed. While the amount of donor referrals received and organs recovered by the OPO remained stable in the initial months of the pandemic, the observed organs transplanted vs. expected organs transplanted (O:E) decreased to the lowest number in the 15-month period and organs transplanted decreased as well. Fewer organs from Oklahoma donors were accepted for transplant despite staff spending more time allocating organs.

Note on the Social Impact of Assertiveness in Occupational Contexts

1985 ◽  
Vol 56 (3) ◽  
pp. 819-822 ◽  
Author(s):  
J. Regis McNamara ◽  
Ronald J. Delamater
Keyword(s):  
Social Impact ◽  
Social Outcomes ◽  
Measurement Systems ◽  
Job Seeking ◽  
Work Related ◽  
The Social ◽  
Seeking Behavior ◽  
Assertive Behavior ◽  
Variable Impact

The extent to which the literature shows assertiveness produces favorable social outcomes in several occupational contexts was examined. Assertive job-seeking behavior may have a variable impact depending on such factors as the riskiness of the behavior, the size of the company, and the nature of the pool of applicants. Managers view assertive behavior, displayed in work-related interactions, more favorably than self-effacing behavior. Assertive customers more readily stand up for their rights and have more positive perceptions of business than nonassertive consumers. Less reliance on analogue studies and improved measurement systems for assessing social reactivity to assertiveness were recommended.

Phosphorus Dynamics in a Highly Weathered Soil as Revealed by Isotopic Labeling Techniques

2004 ◽  
Vol 68 (5) ◽  
pp. 1645-1655 ◽  
Author(s):  
E. K. Bünemann ◽  
F. Steinebrunner ◽  
P. C. Smithson ◽  
E. Frossard ◽  
A. Oberson
Keyword(s):  
Isotopic Labeling ◽  
Phosphorus Dynamics ◽  
Weathered Soil

Impact of migratory snow geese on nitrogen and phosphorus dynamics in a freshwater reservoir

2005 ◽  
Vol 50 (5) ◽  
pp. 882-890 ◽  
Author(s):  
MARK H. OLSON ◽  
MELISSA M. HAGE ◽  
MARK D. BINKLEY ◽  
JAMES R. BINDER
Keyword(s):  
Nitrogen And Phosphorus ◽  
Phosphorus Dynamics ◽  
Snow Geese ◽  
Freshwater Reservoir

Simulating the effects of aquatic avifauna on the Phosphorus dynamics of aquatic systems

2021 ◽  
Vol 445 ◽  
pp. 109495
Author(s):  
Sagar Adhurya ◽  
Suvendu Das ◽  
Santanu Ray
Keyword(s):  
Aquatic Systems ◽  
Phosphorus Dynamics

scholarly journals In Vitro Time-Kill of Common Ocular Pathogens with Besifloxacin Alone and in Combination with Benzalkonium Chloride

2021 ◽  
Vol 14 (6) ◽  
pp. 517
Author(s):  
Joseph Blondeau ◽  
Heleen DeCory
Keyword(s):  
Staphylococcus Epidermidis ◽  
Benzalkonium Chloride ◽  
Bacterial Species ◽  
Drug Resistant ◽  
Resistance Development ◽  
Aureus Isolate ◽  
Killing Activity ◽  
Time Kill ◽  
Variable Impact

Background: Besifloxacin ophthalmic suspension 0.6% (w/v%) contains benzalkonium chloride (BAK) as a preservative. We evaluated the in vitro time-kill activity of besifloxacin, alone and in combination with BAK, against common bacteria implicated in ophthalmic infections. Methods: The activity of besifloxacin (100 µg/mL), BAK (10, 15, 20, and 100 µg/mL), and combinations of besifloxacin and BAK were evaluated against isolates of Staphylococcus epidermidis (n = 4), Staphylococcus aureus (n = 3), Haemophilus influenzae (n = 2), and Pseudomonas aeruginosa (n = 2) in time-kill experiments of 180 min duration. With the exception of one S. aureus isolate, all of the staphylococcal isolates were methicillin- and/or ciprofloxacin-resistant; one P. aeruginosa isolate was ciprofloxacin-resistant. The reductions in the viable colony counts (log10 CFU/mL) were plotted against time, and the differences among the time–kill curves were evaluated using an analysis of variance. Areas-under-the-killing-curve (AUKCs) were also computed. Results: Besifloxacin alone demonstrated ≥3-log killing of P. aeruginosa (<5 min) and H. influenzae (<120 min), and approached 3-log kills of S. aureus. BAK alone demonstrated concentration-dependent killing of S. epidermidis, S. aureus and H. influenzae, and at 100 µg/mL produced ≥3-log kills in <5 min against these species. The addition of BAK (10, 15, and 20 µg/mL) to besifloxacin increased the rate of killing compared to besifloxacin alone, with earlier 3-log kills of all species except P. aeruginosa and a variable impact on S. aureus. The greatest reductions in AUKC were observed among H. influenzae (8-fold) and S. epidermidis (≥5-fold). Similar results were found when the isolates were evaluated individually by their resistance phenotype. Conclusions: In addition to confirming the activity of 100 µg/mL BAK as a preservative in the bottle, these data suggest that BAK may help besifloxacin to achieve faster time-kills on-eye in the immediate timeframe post-instillation before extensive dilution against bacterial species implicated in ophthalmic infections, including drug-resistant S. epidermidis. Greater killing activity may help prevent resistance development and/or help treat resistant organisms.

scholarly journals Similarly Lethal Strains of Extraintestinal Pathogenic Escherichia coli Trigger Markedly Diverse Host Responses in a Zebrafish Model of Sepsis

mSphere ◽  
2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Amelia E. Barber ◽  
Brittany A. Fleming ◽  
Matthew A. Mulvey
Keyword(s):  
The United States ◽  
Host Responses ◽  
Inflammatory Condition ◽  
Therapeutic Approaches ◽  
Zebrafish Model ◽  
Life Threatening ◽  
High Degree ◽  
Care Costs ◽  
Variable Impact ◽  
Degree Of Heterogeneity

ABSTRACT Sepsis is a life-threatening systemic inflammatory condition that is initiated by the presence of microorganisms in the bloodstream. In the United States, sepsis due to ExPEC and other pathogens kills well over a quarter of a million people each year and is associated with tremendous health care costs. A high degree of heterogeneity in the signs and symptomology of sepsis makes this disease notoriously difficult to effectively diagnose and manage. Here, using a zebrafish model of sepsis, we find that similarly lethal but genetically distinct ExPEC isolates can elicit notably disparate host responses. These variances are in part due to differences in the levels and types of flagellin that are expressed by the infecting ExPEC strains. A better understanding of the variable impact that bacterial factors like flagellin have on host responses during sepsis could lead to improved diagnostic and therapeutic approaches to these often deadly infections. In individuals with sepsis, the infecting microbes are commonly viewed as generic inducers of inflammation while the host background is considered the primary variable affecting disease progression and outcome. To study the effects of bacterial strain differences on the maladaptive immune responses that are induced during sepsis, we employed a novel zebrafish embryo infection model using extraintestinal pathogenic Escherichia coli (ExPEC) isolates. These genetically diverse pathogens are a leading cause of sepsis and are becoming increasingly dangerous because of the rise of multidrug-resistant strains. Zebrafish infected with ExPEC isolates exhibit many of the pathophysiological features seen in septic human patients, including dysregulated inflammatory responses (cytokine storms), tachycardia, endothelial leakage, and progressive edema. However, only a limited subset of ExPEC isolates can trigger a sepsis-like state and death of the host when introduced into the bloodstream. Mirroring the situation in human patients, antibiotic therapy reduced ExPEC titers and improved host survival rates but was only effective within limited time frames that varied, depending on the infecting pathogen. Intriguingly, we find that phylogenetically distant but similarly lethal ExPEC isolates can stimulate markedly different host transcriptional responses, including disparate levels of inflammatory mediators. These differences correlate with the amounts of bacterial flagellin expression during infection, as well as differential activation of Toll-like receptor 5 by discrete flagellar serotypes. Altogether, this work establishes zebrafish as a relevant model of key aspects of human sepsis and highlights the ability of genetically distinct ExPEC isolates to induce divergent host responses independently of baseline host attributes. IMPORTANCE Sepsis is a life-threatening systemic inflammatory condition that is initiated by the presence of microorganisms in the bloodstream. In the United States, sepsis due to ExPEC and other pathogens kills well over a quarter of a million people each year and is associated with tremendous health care costs. A high degree of heterogeneity in the signs and symptomology of sepsis makes this disease notoriously difficult to effectively diagnose and manage. Here, using a zebrafish model of sepsis, we find that similarly lethal but genetically distinct ExPEC isolates can elicit notably disparate host responses. These variances are in part due to differences in the levels and types of flagellin that are expressed by the infecting ExPEC strains. A better understanding of the variable impact that bacterial factors like flagellin have on host responses during sepsis could lead to improved diagnostic and therapeutic approaches to these often deadly infections. Podcast: A podcast concerning this article is available.

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