Modulating Nitrogen Adsorption Mode and Microenvironment of Active Sites for Boosting Electrochemical Nitrogen Reduction.

Electrochemical reduction of N2 (NRR) offers a sustainable approach for ammonia (NH3) synthesis, serving as a complementary to the traditional emission- and energy-intensive Haber-Bosch process. However, it faces challenges in N2 activation and competing with pronounced hydrogen evolution reaction (HER). Herein an efficient electrocatalyst comprised of ultrafine Ru nanoclusters (NCs) confined by a hydrophobic molecular layer is developed on the surface of 2D Ti3C2Tx for NRR. These experimental and theoretical calculation results demonstrate that 1) ultrafine Ru NCs dispersed on the Ti3C2Tx surface form paired active sites for N2 chemisorption in a unique tilted configuration with low-energy activation 2) the hydrophobic molecular layer modulates the local microenvironment surrounding catalytically active sites, enabling efficient N2 accumulation while repelling H2O diffusion to the active sites on the Ti3C2Tx surface, thereby leading to an increased N2 concentration and suppressed HER. As a result, an exceptionally high NH3 yield rate of 33.5 µg h-1 mg-1cat and Faradaic efficiency of 65.3% are obtained at -0.25 V versus reversible hydrogen electrode (RHE) in 0.1 m Na2SO4, outperforming those previously reported Ti3C2Tx-derived electrocatalysts. This work provides a valuable strategy for the rational design of advanced electrocatalysts by manipulating active sites and local microenvironments for efficient electrocatalysis.

Correlation Analysis of Breast Cancer DWI Combined with DCE-MRI Imaging Features with Molecular Subtypes and Prognostic Factors.

This study aimed to deeply analyze the application of DWI and DCE-MRI imaging in breast cancer, the correlation between the imaging characteristics of DWI and DCE-MRI and the molecular subtypes and prognostic factors of breast cancer was studied. Firstly, DWI and DCE-MRI scans of all patients before interventional therapy were performed, and relevant information of the subjects was introduced in turn. Secondly, molecular subtypes were determined according to immunohistochemical results and gene amplification. Siemens 3.0 T post-processing workstation was used for image post-processing. The time signal curve (TIC), early enhancement rate (EER) and ADC values were measured, morphological characteristics were recorded, and the correlation between each image feature and molecular subtypes, prognostic factors (tumor size, pathological grade, lymph node metastasis, ER, PR, HER2, Ki67) was analyzed. The results showed that parameters such as ADC value, EER, lobulation sign, burr sign, enhancement way and TIC type were correlated with prognostic factors and molecular subtypes. And Bayesian model discriminant analysis showed that the above imaging parameters couldn't well predict the expression of immunohistochemical factors and molecular subtypes. However, the above characteristics had a good effect on the prediction of pathological grade, with a false diagnosis rate of 9.69%.

High confidence proteomic analysis of yeast LDs identifies additional droplet proteins and reveals connections to dolichol synthesis and sterol acetylation.

Accurate protein inventories are essential for understanding an organelle's functions. The lipid droplet (LD) is a ubiquitous intracellular organelle with major functions in lipid storage and metabolism. LDs differ from other organelles because they are bounded by a surface monolayer, presenting unique features for protein targeting to LDs. Many proteins of varied functions have been found in purified LD fractions by proteomics. While these studies have become increasingly sensitive, it is often unclear which of the identified proteins are specific to LDs. Here we used protein correlation profiling to identify 35 proteins that specifically enrich with LD fractions of Saccharomyces cerevisiae Of these candidates, 30 fluorophore-tagged proteins localize to LDs by microscopy, including six proteins, several with human orthologs linked to diseases, which we newly identify as LD proteins (Cab5, Rer2, Say1, Tsc10, YKL047W, and YPR147C). Two of these proteins, Say1, a sterol deacetylase, and Rer2, a cis-isoprenyl transferase, are enzymes involved in sterol and polyprenol metabolism, respectively, and we show their activities are present in LD fractions. Our results provide a highly specific list of yeast LD proteins and reveal that the vast majority of these proteins are involved in lipid metabolism.

Effects of Perinatal Cognitive Behavioral Therapy on Delivery Mode, Fetal Outcome, and Postpartum Depression and Anxiety in Women.

Objective: To explore the effects of perinatal cognitive-behavioral therapy on delivery mode, fetal outcome, and postpartum depression and anxiety in women. Methods: The clinical data of 88 perinatal pregnant women who came to our hospital from May 2020 to May 2021 were retrospectively analyzed and grouped into the routine group and the cognitive behavioral intervention group according to different perinatal nursing methods, with 44 cases in the cognitive behavioral intervention group received by cognitive behavioral therapy, and 44 cases in the routine group obtained by routine obstetric care during the perinatal period. The anxiety of pregnant women was evaluated by the Hamilton Anxiety Scale (HAMA). The positive cooperation and negative response of the perinatal pregnant women in two groups were recorded. The trial delivery rate, mode of delivery, amount of intrapartum bleeding, neonatal Apgar score, and visual pain simulation score (VAS) within 48 hours after delivery of the pregnant women in the two groups were also recorded and compared. The incidence of depression of pregnant and lying-in women in the two groups was recorded on the 5th and 42nd day after delivery. Results: After the intervention, the anxiety score of pregnant women in the cognitive behavioral intervention group was significantly lower than that in the routine group (P < 0.05). Following the intervention, the positive cooperation score of pregnant women in the cognitive behavioral intervention group was prominently higher than that in the routine group, and the negative cooperation score was observably lower than that in the routine group (P < 0.05). The rate of spontaneous delivery in the cognitive behavioral intervention group was significantly higher than that in the conventional group (P < 0.05), while the VAS score and blood loss in the cognitive behavioral intervention group were notably lower than those in the routine group (P < 0.05). The proportion of women with EPDS score <9 points, i.e., no postpartum depression both on the 5th and 42nd day after delivery, were significantly higher than those in the routine group (P < 0.05), whereas the proportion of patients with postpartum depression symptoms scored 9-13 points were markedly lower than those of the routine group (P < 0.05). Conclusion: The cognitive behavioral therapy can improve the adverse physiological and psychological reactions of pregnant women with perinatal anxiety disorder, enhance the natural delivery rate and postoperative recovery, reduce the risk of neonatal asphyxia, and ensure the safety of mothers and infants in the perinatal period. Compared with routine nursing, this intervention method is more targeted and scientific, and is worthy of clinical promotion.

Mesoporous Graphitic Carbon Nitride Photocatalyzed Switchable Divergent Perfluoroalkylation of Terminal Alkynes.

An efficient and eco-friendly heterogeneous photocatalytic system for the switchable divergent perfluoroalkylation of terminal alkynes has been developed by employing mesoporous graphitic carbon nitride (mpg-CN) as a recyclable, nontoxic, and heavy-metal-free photocatalyst. Regulating the reaction solvents allowed libraries of perfluoroalkylated alkynes, alkenes, and alkenyl iodides to be synthesized in good-to-high yields. Furthermore, mpg-CN is applicable for gram-scale photosynthesis and could be readily recovered for successive reuses.

Investigation and Analysis of Influencing Factors of Moderate to Severe Pain After Uterine Artery Embolization in Patients with Cesarean Scar Pregnancy.

OBJECTIVE: To investigate the occurrence and influencing factors of moderate to severe pain in patients with cesarean scar pregnancy (CSP) after uterine artery embolization (UAE). METHODS: Ninety-eight patients with CSP who underwent UAE in gynecology department of the Fujian Medical University Union Hospital from January 2017 to December 2020 were enrolled, and the specialty data in patients were collected for pain assessment with the adoption of the numerical rating scale (NRS). RESULTS: Moderate to severe pain occurred in 36 patients after surgery, and the interquartile of time to the first onset of postoperative pain in patients was 3.04 (1.75, 7.40) hours. The number of pregnancies, number of miscarriages, human chorionic gonadotropin (HCG) before curettage, duration of medication before UAE, and hemorrhage after UAE were not significantly correlated with the occurrence of moderate to severe pain after UAE (P > 0.05). The volume of gestational sac and days of gestation were responsible for the occurrence of moderate to severe pain after UAE (P < 0.05), with the former being the main influencing factor, and these explained 8.3% of the total variance. CONCLUSION: Moderate to severe pain occurred commonly in patients with CSP undergoing UAE. In clinical care of patients with CSP who are going to undergo UAE, data concerning the volume of gestational sac and days of gestation should be considered for anticipatory pain assessment, and interventions should be implemented as early as possible to reduce the pain and improve the experience of care.

Green and facile synthesis of cobalt-based metal-organic frameworks for the efficient removal of Congo red from aqueous solution.

Wastewater discharged from the dye production and consumption process has a high chemical oxygen demand, high chroma, and complex structure. In this study, a boat shaped flaky cobalt-based metal-organic framework (Co-MOF) was synthesized in aqueous solution by using a green one-step precipitation strategy. This strategy exhibited favorable efficiency for the removal of Congo red (CR). Furthermore, ZIF-67 with a rhombic dodecahedral shape was synthesized in anhydrous methanol solvent through a one-step precipitation strategy. The effects of the contact time, adsorbent dosage, initial CR concentration, and pH value on the adsorption of CR were also investigated. Results indicated that the adsorption of CR by Co-MOF and ZIF-67 fitted well with the Langmuir model and pseudo-second-order kinetic model. The maximum adsorption capacities obtained for Co-MOF and ZIF-67 with the Langmuir model were 1019.06 and 1044.58 mg/g at 25 °C, respectively. The obtained equilibrium time was less than 5 min. Moreover, Co-MOF and ZIF-67 had the same removal capacities for CR. The adsorption mechanism was attributed to the strong electrostatic and π-π stacking interactions of CR with Co-MOF and ZIF-67. Thus, the proposed method is a facile and green method to synthesize Co-MOF for the efficient removal of organic dyes from aqueous solutions.

Efficacy and toxicities of adding molecular targeted agents to first-line chemotherapy in the treatment of advanced biliary tract cancer: a systematic review and meta-analysis.

PURPOSE: The purpose of this study was to assess the efficacy and toxicities of adding molecular targeted agents (MTAs) to first-line chemotherapy in the treatment of advanced biliary tract cancer (BTC). METHODS: An extensive search for relevant clinical trials was conducted in electronic databases (PubMed, Web of Science, and Cochrane) and abstracts presented at meetings. Prospective randomized controlled trials (RCTs) reporting the efficacy and toxicity of chemotherapies with or without MTAs in advanced BTC were selected. The endpoints were overall survival (OS), progression-free survival (PFS), and grade 3 or 4 toxicities. The results were expressed as hazard ratio or relative risk (RR), with their corresponding 95% confidence intervals. RESULTS: The final analysis included a total of 855 advanced BTC patients from six RCTs. Compared with chemotherapy alone, the combination of MTAs with chemotherapy significantly improved overall response rate (ORR) (RR 1.68, 95% confidence interval: 1.28-2.19, P<0.001). And there was also a tendency to improve PFS in the combination regimens (hazard ratio 0.89, 95% confidence interval: 0.78-1.02, P=0.097) but not for OS (hazard ratio 1.01, 95% confidence interval: 0.90-1.13, P=0.93). Subgroup analysis according to targeted agents indicated that the addition of anti-epidermal growth factor receptor agents to chemotherapy significantly improved ORR and PFS, but it did not translate into OS benefits. Additionally, equivalent frequencies of grade 3 or 4 neutropenia, anemia, thrombocytopenia, nausea, and vomiting were found between the two groups excepting for diarrhea. CONCLUSION: The present study indicates that the addition of anti-epidermal growth factor receptor agents to first-line chemotherapy in advanced BTC offers an improved ORR and PFS, but not for OS. Further RCTs with larger samples are warranted to confirm our findings.