Good Value Research Articles

Establishment and validation of a risk prediction model for delayed neurocognitive recovery associated with cerebral oxygen saturation monitoring

BackgroundDelayed neurocognitive recovery (DNR) is a common complication in patients undergoing laparoscopic surgery, and there are currently no effective therapies. It is vital to provide a reliable basis for clinical prediction. This study tried to analyse the risk factors for DNR in patients undergoing laparoscopic colorectal surgery and to establish a risk prediction model. MethodsA retrospective analysis of the clinical data and DNR status of patients undergoing laparoscopic colorectal surgery at Xiangya Hospital of Central South University from March 2018 to July 2020 was conducted. Logistic regression was performed to analyse the related risk factors for DNR post-operatively, and the predictive model of DNR post-operatively was constructed and validated internally. Patients who underwent laparoscopic colorectal surgery between January and July 2021 were also selected for external validation of the predictive model, to ultimately investigate the risk factors for DNR in patients undergoing laparoscopic colorectal surgery.ResultsThe incidence of DNR in patients undergoing laparoscopic colorectal surgery was 15.2% (31/204). The maximum variability of cerebral oxygen, age, education, and pre-existing diabetes was related to the incidence of DNR (p < 0.05). The risk prediction model of DNR after laparoscopic colorectal surgery was established. The internal and external validation showed that the discrimination was good (the AUCs were 0.751 and 0.694, respectively).ConclusionsThe risk prediction model of DNR related to cerebral oxygen saturation monitoring shows good predictive performance and clinical value, providing a basis for postoperative DNR prevention.

Penerapan Pelayanan Prima (Service Excellent) pada Pemeriksaan X-Ray di Bandar Udara Internasional Adi Soemarmo Solo

Excellent service has an important role in a business in the field of aviation companies. The main factor in providing satisfaction for customers is that excellent service can provide satisfaction to customers which will then certainly provide good value to the sustainability of the company. Airports have facilities and infrastructure to support service activities such as implementing excellent service at X-Ray checks. Aviation Security officers must apply good excellent service to generate trust and satisfaction to passengers so that researchers are interested in knowing how the application of excellent service by Aviation Security officers to passengers when checking luggage on X-Ray machines and what should be developed in excellent service to passengers at Adi Soemarmo Solo International Airport. This research uses qualitative methods, namely data collection methods in the form of interviews, observation, and documentation. The data obtained in the form of interviews with Aviation Security officers at Adi Soemarmo Solo International Airport and documents used to carry out daily activities. The results of this study indicate an explanation of the data taken by researchers both in terms of observation, interviews, and documentation that the form of service at the X-Ray inspection is the passenger luggage organizer, X-Ray operator, and manual checking of luggage. The results of researcher observations in the application of excellent service to passengers are only 50% and prioritize flight safety security 50%. Based on data sources from interviews conducted by researchers, that the implementation of excellent service strategies carried out by Aviation Security officers is by Applying Hospitality, Organizing passenger queues, Maximizing personnel, and the 3S + 1C Concept.

Quantitative evaluation of 67Ga-citrate scintigraphy in the management of nephritis

In 67Ga-citrate scintigraphy (Ga-S), visual assessment is used by evaluating renal-uptake comparison with liver and spine and is simple and objective. We adopted the standardized uptake value (SUV) for 67Ga-citrate and proposed two quantitative indices, active nephritis volume (ANV) and total nephritis uptake (TNU). This study clarified the utility of new Ga-S-based quantitative indices in nephritis management. Before SUV measurement, the Becquerel calibration factor of 67Ga-citrate was obtained using a phantom experiment. Seventy patients who underwent SPECT/CT imaging were studied. SUV, ANV, and TNU were calculated using a quantitative analysis software for bone SPECT. SUVmean, ANV, and TNU were analyzed using the (1) threshold method (set 40%) and constant-value method for (2) vertebral SUVmax, and (3) vertebral SUVmean. ROC analysis was used to evaluate SUV, ANV, and TNU diagnostic abilities to distinguish nephritis presence and absence as well as interstitial nephritis (IN) and non-IN. The area under the curve (AUC) for nephritis presence or absence had a good value (0.80) for SUVmean (1), ANV (3), and TNU (3). The AUC for differentiation between IN and non-IN groups had a good value (0.80) for SUVmean (1). Thus, the new Ga-S-based quantitative indices were useful to evaluate nephritis and distinguish IN and non-IN.

Syndecan-1 Levels in Females with Active Rheumatoid Arthritis

Background: The relationship between serum glycoprotein syndecan-1 and disease activity in rheumatoid arthritis (RA) is still unknown. This study aimed to evaluate whether serum syndecan-1 concentrations are associated with moderate/severe disease activity. Methods: Study Design: This was a cross-sectional study. Seventy-five adult women with RA were classified into (a) moderate/severe RA based on the disease activity score, using the erythrocyte sedimentation rate (DAS28-ESR ≥ 3.2, n = 50), and (b) RA in remission (DAS28-ESR &lt; 2.6, n = 25). Twenty-five healthy women were taken as the reference group. Syndecan-1 levels were determined using enzyme-linked immunosorbent assay (ELISA). High values of serum syndecan-1 levels (≥24 ng/mL) were used to identify the utility values of this biomarker. Results: The patients with RA had higher levels of syndecan-1 than the controls (p &lt; 0.001). RA patients with active disease had higher syndecan-1 levels than RA patients in remission (57.6 vs. 23.5 ng/mL, respectively; p = 0.002). High syndecan-1 concentrations demonstrated the following utility values for identifying disease activity: sensitivity, 84% (95%CI: 71–93); specificity, 52% (95%CI: 31–72); positive predictive value, 78% (95%CI: 70–84); and negative predictive value, 62% (95%CI: 44–77). Conclusions: High syndecan-1 levels have good sensitivity and positive predictive value for identifying disease activity; however, their specificity is limited. Future prospective studies are needed to assess whether syndecan-1 levels can predict treatment failure in RA.

Hierarchical nanostructured Co0.5Mn0.5WO4 efficient electrode material for asymmetric supercapacitor application

BackgroundThis research focuses on the electrochemical characteristics of binary metal tungstates for asymmetric supercapacitor applications. Metal tungstates such as Cobalt tungstate (CoWO4) and Manganese tungstate (MnWO4) exhibit excellent electrical conductivity and redox characteristics. Different combinations of binary metal tungstates can serve as effective electrode materials for supercapacitor applications. MethodHerein, Co0.5Mn0.5WO4 nanoparticles was synthesized by the co-precipitation method followed by calcination. The prepared nanoparticles was used as an electrode material for the supercapacitor application. For study the two electrode system, Co0.5Mn0.5WO4 and activated carbon were worked as anode and cathode electrode, respectively. Significant findingsThe prepared electrode materials exhibit a battery type pusudocapacitance in cyclic voltammetry (CV). The charging and discharging properties of the material was analysed by galvanic charging and discharging (GCD) studies and it displays the specific capacitance value of 444 F/g at the current density of 1 A/g and it shows the specific capacitance retention of 91% after 1500 cycles. AC//Co0.5Mn0.5WO4 ASC device shows good energy density, power density and specific capacitance values of 30.5 Wh/Kg, 2800 W/Kg and 112 F/g at 1 A/g current density, respectively.

Examining the mediating role of e-health literacy in the relationship between COVID-19 awareness and dispositional hope and the experiences of those who survived the disease.

The aim of this study was to examine the mediating effect of e-health literacy levels on the relationship between individuals' awareness of COVID-19 and dispositional hope during the COVID-19 pandemic. The research was conducted with a mixed-methods design. Quantitative data were collected for the study online using Google Forms and qualitative data were collected online with an interview technique. In this framework, the qualitative data were obtained from a total of 15 people who had been diagnosed with COVID-19. These participants were selected using the snowball sampling method. A personal information form, e-Health Literacy Scale, Coronavirus Awareness Scale, Dispositional Hope Scale, and semistructured interview form were utilized in the course of the research. As a result of, it was determined that there were significant relationships between coronavirus awareness and both e-health literacy and dispositional hope, as well as between e-health literacy and dispositional hope. The measurement model was found to have good fit values. Testing the structural equation model, it was determined that e-health literacy had a full mediating role between coronavirus awareness and dispositional hope. In addition, this study showed that people who had COVID-19 had increased awareness of COVID-19 after contracting the disease.

Development of a major amputation prediction model and nomogram in patients with diabetic foot.

Diabetes mellitus, as one of the world's fastest-growing diseases, is a chronic metabolic disease that has now become a public health problem worldwide. The purpose of this research was to develop a predictive nomogram model to demonstrate the risk of major amputation in patients with diabetic foot. A total of 634 Type 2 Diabetes Mellitus (T2DM) patients with diabetic foot ulcer hospitalized at the Air Force Medical Center between January 2018 and December 2023 were included in our retrospective study. There were 468 males (73.82%) and 166 females (26.18%) with an average age of 61.64 ± 11.27years and average body mass index of 24.45 ± 3.56kg/m2. The predictive factors were evaluated by single factor logistic regression and multiple logistic regression and the predictive nomogram was established with these features. Receiver operating characteristic (subject working characteristic curve) and their area under the curve, calibration curve, and decision curve analysis of this major amputation nomogram were assessed. Model validation was performed by the internal validation set, and the receiver operating characteristic curve, calibration curve, and decision curve analysis were used to further evaluate the nomogram model performance and clinical usefulness. Predictors contained in this predictive model included body mass index, ulcer sites, hemoglobin, neutrophil-to-lymphocyte ratio, blood uric acid (BUA), and ejection fraction. Good discrimination with a C-index of 0.957 (95% CI, 0.931-0.983) in the training group and a C-index of 0.987 (95% CI, 0.969-1.000) in the validation cohort were showed with this predictive model. Good calibration were displayed. The decision curve analysis showed that using the nomogram prediction model in the training cohort and validation cohort would respectively have clinical benefits. This new nomogram incorporating body mass index, ulcer sites, hemoglobin, neutrophil-to-lymphocyte ratio, BUA, and ejection fraction has good accuracy and good predictive value for predicting the risk of major amputation in patients with diabetic foot.

Diagnostic value of selenoprotein changes in renal tissues for acute rejection of kidney transplantation as revealed by transcriptomics

BackgroundThere seems to be a close link between the changing levels of selenoproteins, which are important for maintaining redox homeostasis in the body, and acute rejection of kidney transplants. The aim of this study was to explore the diagnostic value of selenoprotein change characteristics in renal tissues for acute rejection of kidney transplantation. MethodsWe first explored the potential biological functions of 25 selenoproteins in the human body by enrichment analysis and used the HPA database to clarify the expression levels of selenoproteins in kidney tissues; We then constructed a diagnostic model using “Logistic regression analysis” and “Nomogram model”; Calibration curves and ROC curves were used to evaluate the diagnostic models, and clinical decision curves (DCA) were used to assess the diagnostic value of selenoprotein changes to the clinic; Single-gene GSEA enrichment analysis to further explore the potential regulatory mechanisms of selenoproteins; The Cibersort algorithm explores the level of immune cell infiltration and uses correlation analysis to clarify the correlation between selenoproteins and immune cells; We further assessed the diagnostic value of selenoproteins in kidney transplantation ABMR and TCMR, respectively. Finally, we validated the expression level of selenoproteins in kidney tissues by constructing a rat model of acute rejection of kidney transplantation using transcriptome sequencing. ResultsOur enrichment analysis revealed that selenoproteins are mainly closely associated with biological functions such as oxidative stress, inflammation, and immune regulation (P<0.05); The HPA database suggests that a total of 23 selenoproteins can be expressed in kidney tissue. We constructed a diagnostic model using these 23 selenoproteins, and both calibration curves and ROC curves proved that their change levels have good diagnostic value for acute rejection of kidney transplantation, and DCA curves proved the role of selenoproteins in clinical decision-making; Single-gene GSEA enrichment analysis revealed that selenoproteins are closely associated with immune regulation-related pathways (P<0.05); The Cibersort algorithm identified 10 immune cell infiltration levels that were significantly altered during acute rejection of kidney transplantation (P<0.05), while correlation analyses indicated that selenoproteins correlate with multiple immune cell infiltrations; In ABMR and TCMR, we again verified the diagnostic value of selenoprotein changes in acute rejection of kidney transplantation. Finally, we found significant differences in the expression levels of nine selenoproteins in a rat model of acute rejection of kidney transplantation (P<0.05) . ConclusionChanges in selenoproteins in renal tissues have good diagnostic value for acute rejection of kidneyl transplantation, and selenoproteins may be able to be a potential target for alleviating acute rejection of kidney transplantation.

Relationships between systemic sclerosis and atherosclerosis: screening for mitochondria-related biomarkers

BackgroundPatients with systemic sclerosis (SSc) are known to have higher incidence of atherosclerosis (AS). Mitochondrial injuries in SSc can cause endothelial dysfunction, leading to AS; thus, mitochondria appear to be hubs linking SSc to AS. This study aimed to identify the mitochondria-related biomarkers of SSc and AS.MethodsWe identified common differentially expressed genes (DEGs) in the SSc (GSE58095) and AS (GSE100927) datasets of the Gene Expression Omnibus (GEO) database. Considering the intersection between genes with identical expression trends and mitochondrial genes, we used the least absolute shrinkage and selection operator (LASSO) as well as random forest (RF) algorithms to identify four mitochondria-related hub genes. Diagnostic nomograms were then constructed to predict the likelihood of SSc and AS. Next, we used the CIBERSORT algorithm to evaluate immune infiltration in both disorders, predicted the transcription factors for the hub genes, and validated these genes for the two datasets.ResultsA total of 112 genes and 13 mitochondria-related genes were identified; these genes were then significantly enriched for macrophage differentiation, collagen-containing extracellular matrix, collagen binding, antigen processing and presentation, leukocyte transendothelial migration, and apoptosis. Four mitochondria-related hub DEGs (IFI6, FSCN1, GAL, and SGCA) were also identified. The nomograms showed good diagnostic values for GSE58095 (area under the curve (AUC) = 0.903) and GSE100927 (AUC = 0.904). Further, memory B cells, γδT cells, M0 macrophages, and activated mast cells were significantly higher in AS, while the resting memory CD4+ T cells were lower and M1 macrophages were higher in SSc; all of these were closely linked to multiple immune cells. Gene set enrichment analysis (GSEA) showed that IFI6 and FSCN1 were involved in immune-related pathways in both AS and SSc; GAL and SGCA are related to mitochondrial metabolism pathways in both SSc and AS. Twenty transcription factors (TFs) were predicted, where two TFs, namely BRCA1 and PPARγ, were highly expressed in both SSc and AS.ConclusionFour mitochondria-related biomarkers were identified in both SSc and AS, which have high diagnostic value and are associated with immune cell infiltration in both disorders. Hence, this study provides new insights into the pathological mechanisms underlying SSc and AS. The specific roles and action mechanisms of these genes require further clinical validation in SSc patients with AS.

Pd-Catalyzed Aerobic Synthesis of Allylic Sulfones from Allylic Alcohols and Sulfonyl Hydrazines in Water.

A mild and green synthesis of allylic sulfones from allylic alcohols and sulfonyl hydrazines was developed in water media. The simple and commercially available Pd(PPh3)4 is used as the best catalyst, and the reaction can proceed smoothly at 40 °C under air. This new method does not require the common nitrogen protection and organic media, and can be readily scaled up in gram scale, showing the good practicality value.

Pd-Catalyzed Aerobic Synthesis of Allylic Sulfones from Allylic Alcohols and Sulfonyl Hydrazines in Water.

A mild and green synthesis of allylic sulfones from allylic alcohols and sulfonyl hydrazines was developed in water media. The simple and commercially available Pd(PPh3)4 is used as the best catalyst, and the reaction can proceed smoothly at 40 °C under air. This new method does not require the common nitrogen protection and organic media, and can be readily scaled up in gram scale, showing the good practicality value.

All as σκύβαλα beside the μέγιστον τῶν ἀγαθῶν: Philippians 3:7–11 in Dialogue with Epictetus

In Philippians 3:8, Paul holds all things to be loss (ζημία) and even dung (σκύβαλον) in comparison with Christ. Similarly, beside a precise conception of the good (ἀγαθὸν), Epictetus considers earthly achievements and physical benefits as “indifferents” (ἀδιάφορα), which he defines as things that are neither good nor evil. This paper employs a comparative analysis of Paul and Epictetus to examine the tension inherent in both authors as they seek to explain the sufferings and enjoyments of human existence in light of humankind’s ultimate end. Despite Paul’s strong language, he still recognizes the value of temporal goods, including release from prison, recovery from illness, and financial assistance. Thus, a person can value these benefits when they are joined to the greatest good, as illustrated by Augustine’s conception of ordered loves. Like Paul, Epictetus affirms the lesser value of indifferents, particularly when they enable participation in the good. This paper argues that both Paul and Epictetus acknowledge a secondary value in things that are joined to the supreme good, but that Paul differs from Epictetus in classifying them as goods that can be rightly desired and in acknowledging temporary sufferings to be an evil even as they can bring about good.

All as σκύβαλα beside the μέγιστον τῶν ἀγαθῶν: Philippians 3:7–11 in Dialogue with Epictetus

In Philippians 3:8, Paul holds all things to be loss (ζημία) and even dung (σκύβαλον) in comparison with Christ. Similarly, beside a precise conception of the good (ἀγαθὸν), Epictetus considers earthly achievements and physical benefits as “indifferents” (ἀδιάφορα), which he defines as things that are neither good nor evil. This paper employs a comparative analysis of Paul and Epictetus to examine the tension inherent in both authors as they seek to explain the sufferings and enjoyments of human existence in light of humankind’s ultimate end. Despite Paul’s strong language, he still recognizes the value of temporal goods, including release from prison, recovery from illness, and financial assistance. Thus, a person can value these benefits when they are joined to the greatest good, as illustrated by Augustine’s conception of ordered loves. Like Paul, Epictetus affirms the lesser value of indifferents, particularly when they enable participation in the good. This paper argues that both Paul and Epictetus acknowledge a secondary value in things that are joined to the supreme good, but that Paul differs from Epictetus in classifying them as goods that can be rightly desired and in acknowledging temporary sufferings to be an evil even as they can bring about good.

Synthesis, In Silico Study and Antimalarial Activity of Triazolo[1,5‐a]pyrimidine Derivatives

AbstractThe present study mainly focused on synthesizing novel triazolo[1,5‐a]pyrimidine‐6‐carboxamide derivatives using multicomponent reaction. Synthesized derivatives were duly characterized using spectroscopic methods of analysis FT‐IR and mass spectroscopy, and 1H NMR and 13C NMR confirmed the structure of compounds. Further, the potential of the synthesized compounds against Plasmodium falciparum dihydrofolate reductase (Pf‐DHFR) inhibitors was evaluated by in vitro antimalarial activity, and the results of the study showed moderate to good antimalarial profile of synthesized entities. In silico study of all the synthesized compounds was carried out using Schrödinger LLC‐2020‐3 Software to explain the binding mode and interactions between molecules and pf DHFR enzyme. To study the drug likeliness of molecules, 3D QSAR and Pharmacokinetic studies have been carried out, and the results obtained showed a good pharmacokinetics profile of two compounds, namely AMP‐24 and AMP‐28, having good IC50 values concerning standard drugs. Further, the in vitro enzyme inhibition assay results suggested that the synthesized compound interacts nicely with the enzyme and might be used as a potent antimalarial agent.

Agreement on customs value determination as an instrument of customs regulation

The article considers the tools of customs and tax regulation in the Russian Federation, in particular in the sphere of pricing for taxation purposes and control over the customs value of goods imported into the customs territory of the Eurasian Economic Union. Given the complexity of the process of reviewing draft pricing agreements, as well as the frequency of movement of different goods across the customs border by one supplier or the identity of the transported goods of several suppliers, it is assumed that one of the tools of customs regulation is a customs value agreement. Such agreements can simplify the procedure of moving goods across the customs border of bona fide participants of foreign economic relations. The topic under study requires further development and analysis of the current national legislation in order to form theoretical and legal approaches to such an instrument of customs regulation, including in the aspect of establishing, regulating and determining the procedure for exercising the powers of customs authorities when concluding agreements with participants in foreign economic activity. According to the author’s position, the development of draft agreements selected for the study and their basic conditions can condition the emergence of other tools of customs regulation, ensuring the penetration of some concepts and tools of private law in public-law relations.

Construction of the prognostic nomogram and treatment recommendation in patients with mixed endometrial carcinoma treated with hysterectomy.

The study aimed to identify the independent prognostic factors of mixed endometrial carcinoma (MEC) patients treated with hysterectomy and to explore the optimal treatment modalities for overall survival (OS) and cancer-specific survival (CSS). Using the Surveillance, Epidemiology, and End Results (SEER) database, a total of 12,848 MEC patients treated with hysterectomy were screened out. Independent prognostic factors were identified by Cox regression analysis and used to construct the nomogram. The concordance index (C-index) of OS and CSS were 0.807 and 0.834 in the training set. Validation of the nomogram revealed that the receiver operating curve (ROC) maintained good discrimination, the decision curve analysis (DCA) had a high net benefit rate, and the calibration curves showed high consistency. Patients were grouped by the nomogram formula and the number of positive regional lymph nodes (NPR-Lymph node) to evaluate the therapeutic outcomes of chemotherapy, radiotherapy, neoadjuvant treatment and lymph node operation. Survival analysis revealed that chemotherapy could improve the prognosis for OS and CSS in the high-risk group and in the group with NPR-Lymph node counts above 1 (P < 0.05). Radiotherapy was associated with better OS and CSS in the intermediate-risk and high-risk groups, and in the group with NPR-Lymph node counts above 0 (P < 0.05). Lymphadenectomy was found to prolong OS and CSS in the high-risk group (P < 0.05), while neoadjuvant treatment did not prolong OS and CSS in any group. Thus, in this study, the nomogram for MEC patients treated with hysterectomy was successfully built and validated which could effectively predict the prognosis and identify at-risk population to guide clinical decision-making. The NPR-Lymph node was identified as a potentially strong prognostic indicator with good clinical value.

Modernizing Surgical Quality: A Novel Approach to Improving Detection of Surgical Site Infections in the Veteran Population.

Introduction: Surgical site infections (SSIs) are an important quality measure. Identifying SSIs often relies upon a time-intensive manual review of a sample of common surgical cases. In this study, we sought to develop a predictive model for SSI identification using antibiotic pharmacy data extracted from the electronic medical record (EMR). Methods: A retrospective analysis was performed on all surgeries at a Veteran Affair's Medical Center between January 9, 2020 and January 9, 2022. Patients receiving outpatient antibiotics within 30 days of their surgery were identified, and chart review was performed to detect instances of SSI as defined by VA Surgery Quality Improvement Program criteria. Binomial logistic regression was used to select variables to include in the model, which was trained using k-fold cross validation. Results: Of the 8,253 surgeries performed during the study period, patients in 793 (9.6%) cases were prescribed outpatient antibiotics within 30 days of their procedure; SSI was diagnosed in 128 (1.6%) patients. Logistic regression identified time from surgery to antibiotic prescription, ordering location of the prescription, length of prescription, type of antibiotic, and operating service as important variables to include in the model. On testing, the final model demonstrated good predictive value with c-statistic of 0.81 (confidence interval: 0.71-0.90). Hosmer-Lemeshow testing demonstrated good fit of the model with p value of 0.97. Conclusion: We propose a model that uses readily attainable data from the EMR to identify SSI occurrences. In conjunction with local case-by-case reporting, this tool can improve the accuracy and efficiency of SSI identification.

An MILP model based on a processing strategy of complex multisource constraints for the short-term peak shaving operation of large-scale cascaded hydropower plants

Hydropower with flexible regulation plays an important role in short-term peak shaving operations. However, short-term peak shaving operation is a challenging problem due to the large scale, the nonconvex and nonlinear characteristics, and the complex multisource tasks. This study proposes a mixed integer linear programming (MILP) model, termed MILPoPSC, based on a processing strategy for complex multisource constraints, tailored for short-term peak shaving in large-scale cascaded hydropower plants. The MILP model, designed to incorporate multisource tasks by abstracting them into constraints, ensures that task requirements are met. A novel multisource constraint transformation method is introduced to derive constraint expressions related to power flow, facilitating the unification of constrained variables. Additionally, a classification and integration method based on restriction mode and set theory is proposed to improve solving efficiency by integrating constrains of the same type. The proposed method was applied to 7 hydropower cascade plants in the Wujiang River. The results showed that the linearization method and the processing strategy of complex multisource constraints can successfully reduce the complexity of the MILP model without affecting the solution quality. This indicates that MILPoPSC has good practical value for the short-term peak shaving operation of large-scale cascaded hydropower plants in China.

Synthesis and photocatalytic properties of polyaniline modified cadmium-manganese sulfide materials

In the present paper, polyaniline modification of Mn0.5Cd0.5S composite (PANI/MCS) was fabricated by a simple electrostatic adsorption method. The introduction of PANI makes PANI/MCS composites have better visible light absorption and higher photogenerated carrier segregation efficiency, thus showing better photocatalytic performance. The results show that the 50-PANI/MCS photocatalyst has the best hydrogen production capacity, which was 2.2 times greater than neat MCS. Meanwhile, the nitrogen fixation performance of the best sample 50-PANI/MCS was 4.93 times that of pure MCS. After that, a reasonable reaction mechanism was obtained through various characterization data. A cheap and readily available composite photocatalyst has been synthesized. This paper has good reference value in the area of development of efficient composite photocatalyst.

Young Consumers’ Price Perceptions in Purchasing Foods: Evidence from Greece

The recent consecutive economic and social crises impose sustainable “from farm to fork” food chain management to feed the global population. In this study, we investigated the price perceptions of young consumers (Gen Z) in purchasing foods in Greece to find out the determinants ensuring sustainable, future food consumption. We used eight overall price perception determinants, five with negative roles, namely value and price consciousness, coupon and sales proneness, and price mavenism, and three with positive roles, namely price–quality, price–value, and prestige–sensitivity for the formation of the study’s questionnaire. A total of 514 students (Gen Z, 85%) answered the questionnaire, promoted through the Google platform during September and October 2023. The data were analyzed with statistical tools, combining cross and chi-square tests. Between the negative determinants, the “value consciousness” price perceptions (71.02%) were the most important parameters in purchasing food, followed by “price consciousness” (55.02%) parameters. “Coupon proneness”, 48.4%, and “sales proneness”, 49%, were equally lower, while “price mavenism” parameters were minimally preferred by only 26.4% of the participants. Participants exhibited a major preference for the “value to price” interconnection (66.7%), such as good value for money, value exceeding a product’s price, and overvalued low-priced foods, while their preference for the “quality to price” interconnection was significantly lower (48.8%), such as in terms of getting what you pay for, more money for better quality, and priced, quality foods. The “prestige–sensitivity” price perception was outside of their preferences in terms of food purchasing (only 7.1%). Our findings indicate that young consumers (Gen Z) pay more attention to the values of negative and positive parameters concerning price perceptions when purchasing food rather than quality, coupons and sales, low prices, and mavenism, or even the prestige of the foods. This means that value issues such as the perceived environmental impact (green value), the climate crisis, the social signaling potential, and others are significant concerns, including their price perceptions for food purchases.