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The limits of detection were from 0.42 to 79.8&nbsp;ng&nbsp;g-1 in sludge and from 0.10 to 87.5&nbsp;ng&nbsp;g-1 in sediment. Intraday and interday relative standard deviations (RSDs) were below 15% and 18%, respectively, in both matrices at the tested concentrations. The total procedure was applied to samples of sludge taken from the main wastewater treatment plant (WWTP) of the island of Gran Canaria (Spain) and for sediment samples obtained close to the marine outfalls of different wastewater treatment plants for the same island. Graphical abstract.A novel nanocomposite-modified electrode based on reduced graphene oxide (rGO) decorated with 18-crown-6 (Cr.6) and gold nanoparticles (GNPs) on the surface of a glassy carbon electrode (GCE) was successfully fabricated to investigate the electrochemical sensing of the biomarker L-tryptophan (L-Trp) in the presence of dopamine (DA), ascorbic acid (AA), urea, and glucose. The rGO-GNPs-Cr.6/GCE displayed high electrochemical catalytic activity for L-Trp determination using square-wave voltammetry (SWV). The electrochemical behavior of L-Trp at the rGO-GNPs-Cr.6/GCE displayed higher oxidation current and potential (oxidation peak current of 40 μA at 0.85 V) than rGO-GNPs/GCE, Cr.6/GCE, GNPs/GCE, rGO/GCE, and bare GCE. The SWV demonstrated a linear range of L-Trp concentration from 0.1 to 2.5&nbsp;μM. A low limit of detection (LOD) was found for L-Trp, with LOD of about 0.48 μM and 0.61 μM in diabetic and normal serum, respectively. The fabricated sensor demonstrated high selectivity and sensitivity, and good stability and reproducibility for L-Trp sensing. Finally, the nanocomposite (rGO-GNPs-Cr.6)-modified GCE was applied for the determination of L-Trp in normal and diabetic human serum samples, and displayed excellent LOD and recoveries higher than 91.8%. Graphical Abstract.Citrus Huanglongbing (HLB) is one of the most destructive citrus diseases worldwide, and is associated with the phloem-limited plant pathogenic bacteria Candidatus Liberibacter species. However, there is a latency period during which newly infected trees do not show symptoms, creating challenges for the early detection of HLB. In order to establish a method for rapid detection and to assess the metabolite differences between healthy and HLB-affected Newhall navel oranges, we used matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) to study asymptomatic and symptomatic leaf extracts compared with healthy leaves. The results showed that healthy, asymptomatic, and symptomatic leaves were distinguishable using MALDI-TOF-MS combined with multivariable analysis. Discriminant analysis (DA) results showed that the accuracy of discrimination of the training set and the success rate of cross-validation analysis were both 100%. Blind testing revealed that nine validation samples w believe this strategy has significant implications for rapid and effective HLB screening. Graphical abstract.PURPOSE Atherosclerotic plaque development and progression signifies a complex inflammatory disease mediated by a multitude of proinflammatory leukocyte subsets. Using single photon emission computed tomography (SPECT) coupled with computed tomography (CT), this study tested a new dual-isotope acquisition protocol to assess each radiotracer's capability to identify plaque phenotype and inflammation levels pertaining to leukocytes expressing leukocyte function-associated antigen-1 (LFA-1) and the leukocyte subset of proinflammatory macrophages expressing somatostatin receptor subtype-2 (SST2). Individual radiotracer uptake was quantified and the presence of corresponding immunohistological cell markers was assessed. METHODS Human symptomatic carotid plaque segments were obtained from endarterectomy. Segments were incubated in dual-isotope radiotracers [111In]In-DOTA-butylamino-NorBIRT ([111In]In-Danbirt) and [99mTc]Tc-[N0-14,Asp0,Tyr3]-octreotate ([99mTc]Tc-Demotate 2) before scanning with SPECT/CT. Plaque phero-inflammatory macrophages simultaneously in atherosclerotic plaque tissue. [111In]In-Danbirt may have added value for assessing the total inflammation levels in atherosclerotic plaques in addition to classifying plaque phenotype.PURPOSE In vivo Alzheimer's disease (AD) biomarkers for tau pathology are cerebrospinal fluid (CSF) phosphorylated tau (p-tau) and [18F]flortaucipir positron emission tomography (PET). Our aim was to assess associations between CSF p-tau with [18F]flortaucipir PET and the associations of both tau biomarkers with cognition and atrophy. METHODS We included 78 amyloid positive cognitively impaired patients (clinical diagnoses mild cognitive impairment (MCI, n = 8) and AD dementia (n = 45) and 25 cognitively normal subjects with subjective cognitive decline (SCD) (40% amyloid-positive)). Dynamic 130&nbsp;min [18F]flortaucipir PET scans were acquired to generate binding potential (BPND) images using receptor parametric mapping and standardized uptake values ratios of 80-100&nbsp;min (SUVr80-100min) post injection. We obtained regional BPND and SUVr from entorhinal, limbic, and neocortical regions-of-interest (ROIs), closely aligning to the neuropathological tau staging schemes. Cognition was assessed using MMSE and compositwith cognition and atrophy than CSF p-tau. When [18F]flortaucipir BPND and CSF p-tau were entered simultaneously, [18F]flortaucipir BPND (range sβ = - 0.20 to -&nbsp;0.57, all p  less then  0.05) was strongly associated with multiple cognitive domains and atrophy regions. SUVr showed comparable results to BPND. CONCLUSION Regional [18F]flortaucipir BPND correlated stronger with cognition and neurodegeneration than CSF p-tau, suggesting that tau PET more accurately reflects disease severity in AD.BACKGROUND Using biological markers to predict serious complications and global postoperative recovery, to ensure safe and timely patient discharge after elective colorectal surgery represents a major challenge. The aim of this study was to demonstrate that C-reactive protein levels  2 on the visual analog scale, intestinal gas transit, and patient autonomy for mobility and body care. RESULTS One hundred sixty-height patients, with a mean age of 65&nbsp;years old, were analyzed. Ninety patients (53%) underwent right colectomy and 131 (77%) were operated on by laparoscopy. Severe postoperative complications were observed in 11 patients (6%). One hundred twenty patients (71%) recovered within 5&nbsp;days. C-reactive protein levels less then  172&nbsp;mg/L on postoperative day 3 had a negative predictive value of 80% to predict recovery within 5&nbsp;days. Ninety-five percent of patients with C-reactive protein less then  172&nbsp;mg/L at postoperative day 3 had no severe postoperative complications. [https://www.selleckchem.com/products/recilisib.html Recilisib] CONCLUSION Levels of C-reactive protein less then  172&nbsp;mg/L at postoperative day 3 corresponded with an early recovery in 80% of cases, thus allowing safe and early discharge without risk of serious complications.