Adsorption of Organic Pollutants on Carbonaceous Adsorbents Prepared by Direct Activation of Sweet Cherry Stones.

The main objective of this study was to assess the usefulness of the sweet cherry stones for the production of carbonaceous adsorbents by means of direct physical activation method, using conventional and microwave variant of heating. The adsorbents were characterized in terms of textural parameters, acidic-basic character of the surface, electrokinetic properties and their suitability for drinking water purification. Adsorption tests were carried out against three organic compounds - Triton X-100 (surfactant), bovine serum albumin (protein) and methylene blue (synthetic dye). Depending on the variant of heating applied during activation procedure, the obtained activated biochars differed significantly in terms of the elemental composition, acidic-basic properties as well as degree of specific surface development and the type of porous structure generated. Adsorption tests have showed that the efficiency of organic pollutants removal from aqueous solutions depends significantly not only on the type of the adsorbent and adsorbate applied, but also on the temperature and pH of the system. The sample prepared by microwave-assisted direct activation proved to be very effective in terms of all tested organic pollutants adsorption. The maximum sorption capacity toward Triton X-100, bovine serum albumin and methylene blue reached the level of 86.5, 23.4 and 81.1 mg/g, respectively.

Outcomes of patients discharged from the pediatric emergency department with abnormal vital signs.

BACKGROUND: Vital signs (VS) are used to triage and identify children at risk for severe illness. Few studies have examined the association of pediatric VS at emergency department (ED) discharge with patient outcomes. OBJECTIVE: To determine if children discharged from the ED with abnormal VS have high rates of return visits, admission or adverse outcomes. METHODS: We conducted a retrospective cohort study of children discharged from 2 pediatric EDs with abnormal VS between July 2018-June 2019. We queried electronic health records (EHR) for children ages 0-18 years discharged from the ED with abnormal last recorded VS. VS were considered erroneously entered and thus excluded from analysis if heart rate was <30 or ≥ 300, respiratory rate was 0 or ≥ 100 or oxygen saturation was <50. Patients who were declared deceased at index visit were excluded. Demographic, clinical, and outcome data including return visits within 48 h and adverse outcomes after the initial ED discharge were obtained. RESULTS: Of the 97,824 children evaluated in the EDs during the study period, 17,661 (18.1%) were discharged with abnormal VS. 404 (2.28%) returned to the ED, of which 95 (23.5%) were admitted for the same chief complaint within 48 h. In comparison, the 48-h return rate for children discharged with normal VS was 2.45% (p = 0.219). Children discharged with abnormal VS were more likely to return if they had 2 or more abnormal VS (OR 1.6; 95% CI 1.23-2.07), were less than 3 years old (OR 1.69, 95% CI 1.39-2.06) or their initial acuity level was high (OR 1.34; 95% CI 1.1-1.63). Higher initial acuity level and age less than 3 years were also associated with admission at revisit (OR 2.58; 95% CI 1.59-4.2; OR 2.20, 95% CI 1.36-3.55). Four of the children who returned required PICU admission, but none died, required CPR or endotracheal intubation. CONCLUSION: Although many children were discharged from the ED with abnormal VS, few returned and required admission. Having 2 or more abnormal VS, age less than 3 years and higher acuity increased odds of revisit. Few children suffered serious adverse outcomes.

The Interplay of Conjugation and Metal Coordination in Tuning the Electron Transfer Abilities of NTA-Graphene Based Interfaces.

An artificial leaf is a concept that not only replicates the processes taking place during natural photosynthesis but also provides a source of clean, renewable energy. One important part of such a device are molecules that stabilize the connection between the bioactive side and the electrode, as well as tune the electron transfer between them. In particular, nitrilotriacetic acid (NTA) derivatives used to form a self-assembly monolayer chemisorbed on a graphene monolayer can be seen as a prototypical interface that can be tuned to optimize the electron transfer. In the following work, interfaces with modifications of the metal nature, backbone saturation, and surface coverage density are presented by means of theoretical calculations. Effects of the type of the metal and the surface coverage density on the electronic properties are found to be key to tuning the electron transfer, while only a minor influence of backbone saturation is present. For all of the studied interfaces, the charge transfer flow goes from graphene to the SAM. We suggest that, in light of the strength of electron transfer, Co2+ should be considered as the preferred metal center for efficient charge transfer.

Benefits of time-resolved nonuniform sampling in reaction monitoring: The case of aza-Michael addition of benzylamine and acrylamide.

Monitoring of chemical reactions is best carried out using methods that sample the test object at a rate greater than the time scale of the processes taking place. The recently proposed time-resolved nonuniform sampling (TR-NUS) method allows the use of two-dimensional (2D) nuclear magnetic resonance (NMR) spectra for this purpose and provides a time resolution equivalent to that achievable using one-dimensional spectra. Herein, we show that TR-NUS acquired data eliminates 2D spectral line disturbances and enables more accurate signal integration and kinetics conclusions. The considerations are exemplified with a seemingly simple aza-Michael reaction of benzylamine and acrylamide. Surprisingly, the product identification is possible only using 2D spectra, although credible monitoring requires TR-NUS.

A Call to Restore Your Calling: Self-care of the Emergency Physician in the Face of Life-Changing Stress: Part 6 of 6: Trainee Burnout.

Whereas our last article focused on burnout in practicing pediatric emergency medicine (PEM) physicians, this article centers on burnout in PEM fellows. Our discussion is based solely on trainee burnout literature. As graduates of pediatrics or emergency medicine residencies, PEM fellows are charged with achieving attending-level clinical expertise while continuing to cope with trainee challenges, such as limited practice autonomy, low pay, financial debt, and uncertain future employment. In this article, we discuss PEM fellow burnout and review risk and protective factors, presentation, and evidence-based interventions to mitigate it. In the absence of PEM fellow-specific literature, we share pediatrics and emergency medicine residency data.This article is dedicated to the trainees we have lost to suicide. We miss you.

Accelerated acquisition in pure-shift spectra based on prior knowledge from 1H NMR.

Pure-shift NMR enhances spectral resolution, but the optimal resolution can only be obtained at the cost of acquisition time. We propose to accelerate pure-shift acquisition using optimised 'burst' non-uniform sampling schemes [I. E. Ndukwe, A. Shchukina, K. Kazimierczuk and C. P. Butts, Chem. Commun., 2016, 52, 12769] and then reconstruct the undersampled signal mathematically. Here, we focus on the reliability of this reconstruction depending on the sampling scheme and present a workflow for the sampling optimization. It is ready to be implemented in routine measurements and yields a great improvement in reconstruction of challenging cases.

Qualitative Evaluation of Individual and Group Well-Child Care.

OBJECTIVE: Individual well care (IWC) is the standard delivery model for well-child care in the United States. Alternative models, such as group well care (GWC), may create opportunities to enhance care for babies. The purpose of this study was to evaluate parents' perceptions of social/wellness benefits and system challenges of IWC and GWC. METHODS: Since 2014, we have provided both IWC and GWC at an urban academic practice serving a low-income minority community. We conducted a mixed method study involving surveys and 18 focus groups (11 IWC groups, n = 32 parents; 7 GWC groups, n = 33 parents). Parents completed surveys before convening focus group discussions. Survey results were analyzed using independent t tests; focus groups were digitally recorded, transcribed, and analyzed to identify themes. RESULTS: Both groups had similar demographics: parents were mostly female (91%) and black (>80%); about half had incomes < $20,000. Parents' mean age was 27 years; children's mean age was 11 months. There were no significant differences in overall scores measuring trust in physicians, parent empowerment, or stress. IWC parents' themes highlighted ways to improve care delivery, while GWC parents highlighted both satisfaction with care delivery and social/wellness benefits. GWC parents strongly endorsed this model and reported unique benefits, such as garnering social support and learning from other parents. CONCLUSIONS: Parents receiving both models of care identified ways to improve primary care delivery. Given some of the benefits reported by GWC parents, this model may provide the means to enhance resilience in parents and children in low-income communities.