A Dual-Mode Detection Sensor Based on Nitrogen-Doped Carbon Dots for Visual Detection of Fe(III) and Ascorbic Acid via a Smartphone.

Accurately and promptly detecting Fe3+ and ascorbic acid (AA) is a crucial objective. In this study, nitrogen-doped carbon dots (N-CDs) were synthesized using a one-step hydrothermal synthesis method with 6,9-diamino-2-ethoxyacridine lactate as the precursor. The introduction of Fe3+ and AA resulted in both fluorescence (FL) quenching and enhancement of the synthesized N-CDs. The fluorescent response of the N-CDs probe to Fe3+ was observed in the concentration range of 5-20 µM and 25-50 µM, with a limit of detection (LOD) of 290 nM. Remarkably, the fluorescence of the N-CDs was recovered upon the addition of AA to the N-CDs-Fe3+ system. Using the "off-on" fluorescent N-CDs probe, a linear range of 40-90 µM was achieved with an LOD of 0.69 µM. Additionally, the feasibility of employing a smartphone equipped with an RGB Color Picker was demonstrated for the analysis of Fe3+ and AA concentrations, providing a novel visual detection method. Furthermore, the application of N-CDs in solution demonstrated considerable potential for visually detecting Fe3+ and AA. The proposed dual-mode detection sensor was found to be simple, efficient, and stable, enabling the successful determination of Fe3+ and AA in practical samples with satisfactory results.

Recent Progress in Folic Acid Detection Based on Fluorescent Carbon Dots as Sensors: A Review.

Folic acid (FA) is a water-soluble vitamin found in diverse natural sources and is crucial for preserving human health. The risk of health issues due to FA deficiency underscores the need for a straightforward and sensitive FA detection methodology. Carbon dots (CDs) have gained significant attention owing to their exceptional fluorescence performance, biocompatibility, and easy accessibility. Consequently, numerous research studies have concentrated on developing advanced CD fluorescent probes to enable swift and precise FA detection. Despite these efforts, there is still a requirement for a thorough overview of the efficient synthesis of CDs and their practical applications in FA detection to further promote the widespread use of CDs. This review paper focuses on the practical applications of CD sensors for FA detection. It begins with an in-depth introduction to FA and CDs. Following that, based on various synthetic approaches, the prepared CDs are classified into diverse detection methods, such as single sensing, visual detection, and electrochemical methods. Furthermore, persistent challenges and potential avenues are highlighted for future research to provide valuable insights into crafting effective CDs and detecting FA.

Bimetallic metal-organic frameworks (BMOFs) for dye removal: a review.

Safe drinking water and a clean living environment are essential for good health. However, the extensive and growing use of hazardous chemicals, particularly carcinogenic dyes like methylene blue, methyl orange, rhodamine B, and malachite green, in both domestic and industrial settings, has led to a scarcity of potable water and environmental challenges. This trend poses a serious threat to human society, sustainable global development, and marine ecosystems. Consequently, researchers are exploring more advanced methods beyond traditional wastewater treatment to address the removal or degradation of these toxic dyes. Conventional approaches are often inadequate for effectively removing dyes from industrial wastewater. In this study, we investigated bimetallic metal-organic frameworks (BMOFs) as a solution to these limitations. BMOFs demonstrated outstanding dye removal and degradation capabilities due to their multifunctionality, water stability, large surface area, adjustable pore size, and recyclability. This review provides a comprehensive overview of research on dye removal from wastewater using BMOFs, including their synthesis methods, types of dyes, and processes involved in dye removal, such as degradation and adsorption. Finally, the review discusses the future potential and emerging opportunities for BMOFs in sustainable water treatment.

Eco-friendly spectrophotometric methods for concurrent analysis of phenol, 2-aminophenol, and 4-aminophenol in ternary mixtures and water samples: assessment of environmental sustainability.

Recently, there has been a high demand for green procedures in analytical chemistry, particularly those utilizing eco-friendly solvents. In this context, three feasible derivative UV spectrophotometric methods namely, derivative ratio-zero crossing spectra (DRZCS), double divisor ratio spectra (DDRS), and successive derivative subtraction coupled with constant multiplication (SDS-CM) were developed to quantify a ternary mixture of phenol (P), 2-aminophenol (2-AP), and 4-aminophenol (4-AP) in real water samples simultaneously, using ethanol as a solvent. The established methods demonstrated a good linear range, covering 2-60 µg mL-1 for P and 2-50 µg mL-1 for 2-AP and 4-AP, in all approaches with a high correlation coefficient (R2 ≥ 0.9995). In compliance with ICH guidelines, the methods exhibited acceptable precision and accuracy, as indicated by good spike recovery with low relative standard deviations. The eco-friendliness of the UV spectrophotometric approach was assessed using analytical eco-scale (AES), analytical greenness (AGREE), and analytical greenness metrics for sample preparation (AGREEprep). These evaluations confirmed the eco-friendliness of the proposed methods in terms of solvents, energy consumption, and waste generation. The proposed procedure proved to be efficient in quantifying each component in laboratory-synthesized mixtures and real water samples, thanks to its simplicity, accuracy, sensitivity, and cost-effectiveness.

Environmentally sustainable synthesis of whey-based carbon dots for ferric ion detection in human serum and water samples: evaluating the greenness of the method.

Carbon dots (CDs) are valued for their biocompatibility, easy fabrication, and distinct optical characteristics. The current study examines using whey to fabricate CDs using the hydrothermal method. When stimulated at 350 nm, the synthetic CDs emitted blue light at 423 nm and revealed a selective response to ferric ion (Fe3+) in actual samples with great sensitivity, making them a suitable probe for assessing Fe3+ ions. The produced carbon dots demonstrated great photostability, high sensitivity, and outstanding biocompatibility. The findings showed that Fe3+ ions could be quickly, sensitively, and extremely selectively detected in an aqueous solution of carbon dots, with a revealing limit of 0.409 µM in the linear range of 0-180 µM. Interestingly, this recognition boundary is far inferior to the WHO-recommended threshold of 0.77 µM. Two metric tools which were AGREE and the ComplexGAPI were also used to evaluate the method's greenness. The evaluation confirmed its superior environmental friendliness.

[Right-sided or left-sided donor nephrectomy-is this really relevant?] / Rechts- oder linksseitige Donornephrektomie ­ ist das wirklich relevant?

BACKGROUND: In the context of living donation, the protection of the donor and the outcome are very important aspects. However, the side selection of the donor nephrectomy is also decisive. In this work, the basics of side selection and the question of whether there are differences regarding the left-sided or right-sided donor nephrectomy are considered. MATERIALS AND METHODS: Living kidney donation data of our center between December 2004 and July 2019 were evaluated in terms of withdrawal side, complications and outcome, as well as the current literature in PubMed. Finally, the results from our center are compared with the current literature. RESULTS: During the investigation period, 152 live donations were carried out in our center. In these cases 66 patients had a left-sided and in 86 cases a right-sided donor nephrectomy. One transplant vein thrombosis occurred in each group. Complications and outcome were similar for the recipient in both groups. It was noticed in the current literature that generally more left-sided donor nephrectomies are performed, most likely due to the preference of the surgeon. Although a low significantly increased risk of transplant vein thrombosis after right-sided donor nephrectomy is described, all authors agree that right-sided donor nephrectomy is a safe procedure with good outcome. CONCLUSIONS: Our own results and the current literature show that the right-sided donor nephrectomy is a safe procedure with only a slightly increased risk of complications compared to the left side and therefore can be recommended. It is clearly safe for the donor and organ, with an equivalent outcome for the recipient. The results are also dependent on the experience of the surgeon.

[Radiation cystitis : Pathophysiology and treatment]. / Radiogen bedingte Zystitis : Pathophysiologie und Therapie.

Radiation cystitis (RC) is a common side-effect of radiation to the pelvis. Their clinical appearance as well as their degree of expression is manifold, as are the therapeutic options. However, in the absence of randomized examinations, recommendations are difficult. We differentiate between oral, systemic therapies, intravesical instillations and interventions as well as interventional, radiological and, as an ultima ratio, surgical treatments. This article provides an overview of the different treatment options with particular emphasis on the conservative-interventional therapy options.

[Living kidney donation - an overview]. / Lebendnierenspende - ein aktueller Überblick.

BACKGROUND: The living kidney donation has become increasingly important in recent years. Because of the decreasing number of postmortem donors, there has been a dramatic increase in morbidity and mortality due to the long waiting times for patients on dialysis. By timely living donation after dialysis entry or even preemptively, this can be avoided. AIM: In addition, the living donor has better graft function and better graft survival which is due to the predictability of the donation, the optimal conditioning of donor and recipient, and the short ischemia time. To protect the donor, to provide legal protection, and to avoid abuse, the German legislature reacted with the Transplantation Act and its amendment. The recent recommendations for donor evaluation from the Amsterdam Forum have been used by the Federal Medical Council to revise current guidelines and guidelines for living donation will be drawn up. CONCLUSION: The focus of these efforts is standardization of the procedure and protection of the kidney donor. This is also reflected in the recommendations for organ removal technique and the selection of the organ to be used for kidney donation.