Nyelv, nyelvtörvény, nyelvtudomány

<p>4a, Forest plot on the associations between DM and bile leakage after hepatectomy. 4b, Forest plot on the associations between DM and ascites after hepatectomy. 4c, Forest plot on the associations between DM and liver decompensation after hepatectomy. DM, diabetes mellitus. The boxes and lines indicate the relative ratios (RRs) and their confidence intervals (CIs) on a log scale for each study. The pooled RR is represented by a diamond. The size of the black squares indicates the relative weight of each estimate.</p

Turn-on Persistent Luminescence Probe Based on Graphitic Carbon Nitride for Imaging Detection of Biothiols in Biological Fluids

Herein, we present a novel strategy based on a “turn-on” persistent luminescence imaging chemical system of graphitic carbon nitride for detecting biothiols in biological fluids. Graphitic carbon nitride (g-C₃N₄) as persistent luminescence probe is fabricated via a new procedure based on pyrolysis of guanidine hydrochloride under ambient atmospheric conditions. The prepared g-C₃N₄ nanosheets give intensively long-persistent luminescence that can avoid interference from biological media such as tissue autofluorescence and scattering light. The original persistent luminescence of g-C₃N₄ turns off due to the adsorption of silver ion (Ag⁺) onto g-C₃N₄ materials with an electron transfer process. The presence of biothiols induces the onset of persistent luminescence emission by interrupting the quenching interaction, thereby turning on the imaging probe. The approach exhibits high specificity and high sensitivity to biothiols with low detection limit for cysteine (Cys), homocysteine (Hcy), and glutathione (GSH) with 6.4, 8.1, and 9.6 nM, respectively. It is also successfully applied for imaging detection of biothiols in human urine, plasma, and cell lysates, demonstrating its great value of practical application in biological systems

Clinical outcomes of patients with and without diabetes mellitus after hepatectomy: A systematic review and meta-analysis

<div><p>Background</p><p>Clinical data regarding the influence of diabetes mellitus (DM) on the outcomes of patients undergoing hepatectomy are conflicting. To determine the impact of DM on the clinical outcomes of patients undergoing hepatectomy, we systematically reviewed published studies and carried out a meta-analysis.</p><p>Methods</p><p>A systematic literature search of Pubmed, Sciencedirect, Web of Science, and Chinese Biomedical Database was conducted from their inception through February 2, 2016. The combined relative risk (RR) or hazard ratio (HR) with 95% confidence intervals (95% CI) was calculated.</p><p>Results</p><p>A total of 16 observational studies with 15710 subjects were eligible for meta-analysis. The pooled results showed that DM significantly increased the risk of overall postoperative complications (RR 1.34; 95% CI 1.19–1.51; P<0.001), DM-associated complications (RR 1.8; 95% CI 1.29–2.53; P<0.001), liver failure (RR 2.21; 95% CI 1.3–3.76; P = 0.028) and post-operative infections (RR 1.59; 95% CI 1.01–2.5; P = 0.045). In addition, DM was also found to be significantly associated with unfavorable overall survival and disease free survival after liver resection. The pooled HR was 1.63 (95% CI 1.33–1.99; P<0.001) for overall survival and 1.55 (95% CI 1.07–2.25; P = 0.019) for disease free survival.</p><p>Conclusion</p><p>DM is associated with poor outcomes in patients undergoing hepatectomy. DM should be taken into account cautiously in the management of patients undergoing hepatectomy. Further prospective studies are warranted to explore effective interventions to improve the poor outcomes of diabetic patients undergoing hepatectomy.</p></div

Multisignals Sensing Platform for Highly Sensitive, Accurate, and Rapid Detection of <i>p</i>‑Aminophenol Based on Adsorption and Oxidation Effects Induced by Defective NH₂‑Ag-nMOFs

Labile toxic pollutants detection remains a challenge due to the problem that a single method is prone to producing false-negative/-positive signals. The construction of a multisignal sensing platform with the advantages of different strategies is an effective way to solve this problem. Herein, a novel resonant light scattering (RLS), fluorescent and rapid visual multisignals sensing strategy for p-aminophenol (p-AP) detection was designed based on the adsorption and oxidation effects of defective amino-functionalized Ag-based nano metal–organic frameworks (NH2-Ag-nMOFs). In this reaction process, NH2-Ag-nMOFs with incomplete coordination oxidize H2O2 to produce singlet oxygen (1O2) which rapidly oxidizes p-AP, leading to the reduction of Ag+ to Ag0, thereby disrupting the structure of NH2-Ag-nMOFs and resulting in fluorescence quenching of NH2-Ag-nMOFs. Synchronously, owing to Ag0 aggregation and p-AP oxidation, the color of the system changed from colorless to purplish-red and pale brown within 20 s. The assay has realized the rapid naked-eye detection of 5 μM p-AP rapidly. Additionally, thanks to the intermolecular hydrogen bonding, NH2-Ag-nMOFs-p-AP aggregates formed, which enhanced the RLS signal. With the RLS signal, the designed multisignals sensing platform can analyze p-AP at a concentration as low as 11 nM and yield a wider dynamic response range than any single signal strategy reported before, which can quickly meet the measurement requirement of different actual samples. Overall, the proposed strategy without assembling various signal indicators presented an accurate, rapid, cost-effective, and sensitive multisignals sensing platform for p-AP analysis and has great prospects in labile toxic pollutants monitoring

Protein Quantitation Using Ru-NHS Ester Tagging and Isotope Dilution High-Pressure Liquid Chromatography–Inductively Coupled Plasma Mass Spectrometry Determination

An accurate, simple, and sensitive method for the direct determination of proteins by nonspecies specific isotope dilution and external calibration high-performance liquid chromatography–inductively coupled plasma mass spectrometry (HPLC–ICPMS) is described. The labeling of myoglobin (17 kDa), transferrin (77 kDa), and thyroglobulin (670 kDa) proteins was accomplished in a single-step reaction with a commercially available bis­(2,2′-bipyridine)-4′-methyl-4-carboxybipyridine-ruthenium <i>N</i>-succinimidyl ester-bis­(hexafluorophosphate) (Ru-NHS ester). Using excess amounts of Ru-NHS ester compared to the protein concentration at optimized labeling conditions, constant ratios for Ru to proteins were obtained. Bioconjugate solutions containing both labeled and unlabeled proteins as well as excess Ru-NHS ester reagent were injected onto a size exclusion HPLC column for separation and ICPMS detection without any further treatment. A ⁹⁹Ru enriched spike was used for nonspecies specific ID calibration. The accuracy of the method was confirmed at various concentration levels. An average recovery of 100% ± 3% (1 standard deviation (SD), <i>n</i> = 9) was obtained with a typical precision of better than 5% RSD at 100 μg mL^–1 for nonspecies specific ID. Detection limits (3SD) of 1.6, 3.2, and 7.0 fmol estimated from three procedure blanks were obtained for myoglobin, transferrin, and thyroglobulin, respectively. These detection limits are suitable for the direct determination of intact proteins at trace levels. For simplicity, external calibration was also tested. Good linear correlation coefficients, 0.9901, 0.9921, and 0.9980 for myoglobin, transferrin, and thyroglobulin, respectively, were obtained. The measured concentrations of proteins in a solution were in good agreement with their volumetrically prepared values. To the best of our knowledge, this is the first application of nonspecies specific ID for the accurate and direct determination of proteins using a Ru-NHS ester labeling reagent

Stratified analysis of the association between diabetes mellitus and prognosis after hepatectomy.

<p>Stratified analysis of the association between diabetes mellitus and prognosis after hepatectomy.</p

Label-Free DNA Assay by Metal Stable Isotope Detection

The interest in label-free bioassays is increasing rapidly because of their simple procedure and direct information on the interaction between the target molecule and the sensing unit. One of the major obstacles in the application of label-free biosensors is the difficulty to produce stable and reproducible optical, electric, electrochemical, or magnetic properties for the sensitive detection of the target molecules. In this work, we demonstrated a label-free DNA assay, by directly measuring the intrinsic ⁶³Cu and ⁶⁵Cu stable isotopes inside the double-strand DNA-templated Cu nanoparticles. The experimental conditions, including detection of copper by elemental mass spectrometry, the copper nanoparticles formation parameters, the hybrid chain reaction parameters, and analytical performance, were investigated in detail. The ⁶³Cu signal intensity possesses a linear relation with the concentration of target DNA over the range of 20–1000 pM with a detection limit of 4 pM (3σ). The detection limit of this method is among the most sensitive label-free techniques and also comparable to the lanthanides and Au nanoparticles labeled assays by elemental mass spectrometric detection. The proposed label-free bioassay is simple and sensitive and eliminated the need for optical, electric, electrochemical, or magnetic properties of the sensing unit. To our best knowledge, this is the first report of the label-free bioassay by metal stable isotope detection

Forest plot on the associations between DM and survival after hepatectomy.

<p>6a, Forest plot on the associations between DM and overall survival after hepatectomy. 6b, Forest plot on the associations between DM and disease-free survival after hepatectomy. DM, diabetes mellitus. The boxes and lines indicate the hazard ratios (HRs) and their confidence intervals (CIs) on a log scale for each study. The pooled HR is represented by a diamond. The size of the black squares indicates the relative weight of each estimate.</p

Flow diagram of study selection.

<p>Flow diagram of study selection.</p

Controllable Synthesis of Defective UiO-66 for Efficient Degradation and Detection of Ozone

Metal–organic framework (MOF) structures have gained significant attention for their exceptional catalytic performance in ozone degradation, even under high humidity conditions, which is attributed to the presence of unsaturated metal sites (MOF defects). However, the correlation between MOF defects and catalytic ozone remains ambiguous, and a general approach for the controllable synthesis of high-performance MOF structures is currently lacking. Herein, different defective UiO-66 materials with cluster or ligand defects were obtained by precisely controlling small molecular acid modulators. Their catalytic performance can be analyzed in real time through the specific cataluminescence (CTL) signal of ozone at the interface. The presence of ligand defects was found to be crucial for both catalytic degradation and luminescence of ozone, and the CTL signal exhibited a positive correlation with the endogenous hydroxyl group content in the material (R2 = 0.982), while external humidity further supplemented internal water molecules within the material. Furthermore, theoretical calculations were conducted to compare the adsorption behaviors of ozone on the defective UiO-66 under dry/wet conditions, leading to the proposal of two potential reaction pathways. Subsequently, UiO-66-DA with superior catalytic performance was employed to develop a highly efficient CTL sensor capable of accurately detecting ozone (LOD = 23.3 ppb). This study held significant value in elucidating the reaction site of ozone on MOFs and achieving optimal catalytic effects through the careful selection of modulators and humidity levels