Quantifying NOx point sources with Landsat and Sentinel-2 satellite observations of NO2 plumes.

We show that the Landsat and Sentinel-2 satellites can detect NO2 plumes from large point sources at 10 to 60 m pixel resolution in their blue and ultrablue bands. We use the resulting NO2 plume imagery to quantify nitrogen oxides (NOx) emission rates for several power plants in Saudi Arabia and the United States, including a 13-y analysis of 132 Landsat plumes from Riyadh power plant 9 from 2009 through 2021. NO2 in the plumes initially increases with distance from the source, likely reflecting recovery from ozone titration. The fine pixel resolutions of Landsat and Sentinel-2 enable separation of individual point sources and stacks, including in urban background, and the long records enable examination of multidecadal emission trends. Our inferred NOx emission rates are consistent with previous estimates to within a precision of about 30%. Sources down to ~500 kg h-1 can be detected over bright, quasi-homogeneous surfaces. The 2009 to 2021 data for Riyadh power plant 9 show a strong summer peak in emissions, consistent with increased power demand for air conditioning, and a marginal slow decrease following the introduction of Saudi Arabia's Ambient Air Standard 2012.

Single-Fluorophore Indicator to Explore Cellular and Sub-cellular Lactate Dynamics.

Lactate is an energy substrate and an intercellular signal, which can be monitored in intact cells with the genetically encoded FRET indicator Laconic. However, the structural complexity, need for sophisticated equipment, and relatively small fluorescent change limit the use of FRET indicators for subcellular targeting and development of high-throughput screening methodologies. Using the bacterial periplasmic binding protein TTHA0766 from Thermus thermophilus, we have now developed a single-fluorophore indicator for lactate, CanlonicSF. This indicator exhibits a maximal fluorescence change of 200% and a KD of ∼300 µM. The fluorescence is not affected by other monocarboxylates. The lactate indicator was not significantly affected by Ca2+ at the physiological concentrations prevailing in the cytosol, endoplasmic reticulum, and extracellular space, but was affected by Ca2+ in the low micromolar range. Targeting the indicator to the endoplasmic reticulum revealed for the first time sub-cellular lactate dynamics. Its improved lactate-induced fluorescence response permitted the development of a multiwell plate assay to screen for inhibitors of the monocarboxylate transporters MCTs, a pharmaceutical target for cancer and inflammation. The functionality of the indicator in living tissue was demonstrated in the brain of Drosophila melanogaster larvae. CanlonicSF is well suited to explore lactate dynamics with sub-cellular resolution in intact systems.

Multidisciplinary management and optimization of frail or high surgical risk patients in colorectal cancer surgery: Prospective observational analysis. / Manejo multidisciplinar y optimización del paciente oncofrágil o de elevado riesgo quirúrgico en cirugía del cáncer colorrectal. Análisis observacional prospectivo.

INTRODUCTION: Frailty is associated with greater postoperative morbidity and mortality. Individualized multidisciplinary management of these patients can improve the quality of care. The objectives of this study are to determine the percentage of frail patients with colorectal cancer in our population, and to describe the morbidity and mortality associated with surgery and the evolution of palliative treatment. METHODS: A prospective, observational study of patients with surgical colorectal cancer (February 1, 2018-April 30, 2019). Frail patients were screened and classified according to degrees of frailty. Therapeutic decision-making (surgery or palliative treatment) was determined by the degree of fragility and explicit will of the patient. Postoperative comorbidities were analyzed (according to Clavien-Dindo and Comprehensive Complication Index), as were mortality and oncological follow-up. RESULTS: The study included 193 patients with surgical colorectal cancer, with a mean age of 74 years (44-92). Screening identified 46 frail patients (24%), with a mean age of 80 years (57-92). Twenty-two patients were optimized and underwent surgery (48%), with a mean age of 78 years (57-89). Relevant adverse effect rate was 27.7% (4 grade iva adverse effects, one ivb and one v, according to Clavien-Dindo). Comprehensive Complication Index was 17.5. Palliative treatment was administered in 24 patients (52%), with a mean age of 82 years (59-92). Mean follow-up was 7.8 months. There were 2 deaths due to disease progression (8.3%), 5 re-consultations due to complications of colorectal cancer (20.1%). CONCLUSIONS: The multidisciplinary and individualized management of frail patients with colorectal cancer is key to improve the quality of care in the treatment of this patient group.

Response of the biomining Acidithiobacillus ferrooxidans to high cadmium concentrations.

Cadmium is a heavy metal present in contaminated soils. It has no biological role but when entering cells generates DNA damage, overexpression of stress response proteins and misfolded proteins, amongst other deleterious effects. Acidithiobacillus ferrooxidans is an acidophilic bacterium resisting high concentrations of heavy metals such as cadmium. This is important for industrial bioleaching processes where Cd+2 concentrations can be 5-100 mM. Cadmium resistance mechanisms in these microorganisms have not been fully characterized. A. ferrooxidans ATCC 53993 contains genes coding for possible metal resistance determinants such as efflux systems: P-type ATPases, RND transporters and cation diffusion facilitators. In addition, it has extra copies of these genes in its exclusive genomic island (GI). Several of these putative genes were characterized in the present report by determining their transcriptional expression profiles and functionality. Moreover, an iTRAQ proteomic analysis was carried out to explore new cadmium resistance determinants in this bacterium. Changes in iron oxidation components, upregulation of transport proteins and variations in ribosomal protein levels were seen. Finally, increased concentrations of exclusive putative cadmium ATPases present in strain ATCC 53993 GI and other non-identified proteins such as Lferr_0210, forming part of a possible operon, could explain its extreme cadmium resistance. SIGNIFICANCE: Cadmium is a very toxic heavy metal present in mining operations and contaminated environments, it can affect all living organisms, including humans. Therefore, it is important to know the resistance mechanisms of bacteria highly resistant to this metal. These microorganisms in turn, can be used to bioremediate more efficiently environments highly polluted with metals. The results obtained suggest A. ferrooxidans strain ATCC 53993 can be an efficient bacterium to remove cadmium, copper and other metals from contaminated sites.

Manejo multidisciplinar y optimización del paciente oncofrágil o de elevado riesgo quirúrgico en cirugía del cáncer colorrectal. Análisis observacional prospectivo / Multidisciplinary management and optimization of frail or high surgical risk patients in colorectal cancer surgery: Prospective observational análisis

INTRODUCCIÓN: La fragilidad se asocia con una mayor morbimortalidad postoperatoria. El manejo multidisciplinar individualizado de estos pacientes puede mejorar la calidad asistencial. Los objetivos de este trabajo son conocer el porcentaje de pacientes frágiles con cáncer colorrectal en nuestra población y describir la morbimortalidad asociada a la cirugía y la evolución del tratamiento paliativo. MÉTODOS: Estudio observacional prospectivo de pacientes con cáncer colorrectal quirúrgico (1 de febrero del 2018-30 de abril del 2019). Cribado de paciente frágil y clasificación según grados de fragilidad. Decisión terapéutica (cirugía o tratamiento paliativo) según grado de fragilidad y voluntades explícitas del paciente. Análisis de comorbilidad postoperatoria (según Clavien-Dindo y Comprehensive Complication Index), mortalidad y seguimiento oncológico. RESULTADOS: Fueron visitados 193 pacientes con cáncer colorrectal quirúrgico, con una edad media de 74 años (44-92). Cribado: 46 pacientes frágiles (24%), con una edad media de 80 años (57-92). Se optimizó e intervino a 22 pacientes (48%), con una edad media de 78 años (57-89). Efectos adversos relevantes del 27,7% (4 efectos adversos grado iva, uno ivb y otro V, según Clavien-Dindo). Comprehensive Complication Index de 17,5. Tratamiento paliativo en 24 pacientes (52%), con una edad media de 82 años (59-92). Seguimiento medio de 7,8 meses, 2 muertes por progresión de la enfermedad (8,3%), 5 reconsultas por complicaciones del cáncer colorrectal (20,1%). CONCLUSIONES: El manejo multidisciplinar e individualizado del paciente frágil con cáncer colorrectal es clave para mejorar la calidad asistencial en el tratamiento de este grupo de pacientes

INTRODUCTION: Frailty is associated with greater postoperative morbidity and mortality. Individualized multidisciplinary management of these patients can improve the quality of care. The objectives of this study are to determine the percentage of frail patients with colorectal cancer in our population, and to describe the morbidity and mortality associated with surgery and the evolution of palliative treatment. METHODS: A prospective, observational study of patients with surgical colorectal cancer (February 1, 2018-April 30, 2019). Frail patients were screened and classified according to degrees of frailty. Therapeutic decision-making (surgery or palliative treatment) was determined by the degree of fragility and explicit will of the patient. Postoperative comorbidities were analyzed (according to Clavien-Dindo and Comprehensive Complication Index), as were mortality and oncological follow-up. RESULTS: The study included 193 patients with surgical colorectal cancer, with a mean age of 74 years (44-92). Screening identified 46 frail patients (24%), with a mean age of 80 years (57-92). Twenty-two patients were optimized and underwent surgery (48%), with a mean age of 78 years (57-89). Relevant adverse effect rate was 27.7% (4 grade iva adverse effects, one ivb and one V, according to Clavien-Dindo). Comprehensive Complication Index was 17.5. Palliative treatment was administered in 24 patients (52%), with a mean age of 82 years (59-92). Mean follow-up was 7.8 months. There were 2 deaths due to disease progression (8.3%), 5 re-consultations due to complications of colorectal cancer (20.1%). CONCLUSIONS: The multidisciplinary and individualized management of frail patients with colorectal cancer is key to improve the quality of care in the treatment of this patient group