295 research outputs found
Time-resolved infrared absorption spectroscopy applied to photoinduced reactions: how and why
Abstract: Time-resolved infrared (IR) spectroscopy is a widely used technique in the investigation of photoinduced reactions, given its capabilities of providing structural information about the presence of intermediates and the reaction mechanism. Despite the fact that it is used in several fields since the â80s, the communication between the different scientific communities (photochemists, photobiologists, etc.) has been to date quite limited. In some cases, this lack of communication happenedâand still happensâeven inside the same scientific community (for instance between specialists in ultrafast ps/fs IR and those in âfastâ ns/”s/ms IR). Even more surprising is the difficulty of non-specialists to understand the potential of time-resolved IR spectroscopy, despite the fact that IR spectroscopy is normally taught to all chemistry and material science students, and to several biology and physics students. This tutorial review aims at helping to solve these issues, first by providing a comprehensive but reader-friendly overview of the different techniques, and second, by focusing on five âcase studiesâ (from photobiology, gas-phase photocatalysis, photochemistry, semiconductors and metal-carbonyl complexes). We are confident that this approach can help the readerâwhichever is its backgroundâto understand the capabilities of time-resolved IR spectroscopy to study the mechanism of photoinduced reactions. Graphical Abstract: [Figure not available: see fulltext.
Simple enucleation for the treatment of highly complex renal tumors: Perioperative, functional and oncological results.
GOOGLE EARTH ENGINE: APPLICATION OF ALGORITHMS FOR REMOTE SENSING OF CROPS IN TUSCANY (ITALY)
Abstract. Remote sensing has become an important mean to assess crop areas, specially for the identification of crop types. Google Earth Engine (GEE) is a free platform that provides a large number of satellite images from different constellations. Moreover, GEE provides pixel-based classifiers, which are used for mapping agricultural areas. The objective of this work is to evaluate the performance of different classification algorithms such as Minimum Distance (MD), Random Forest (RF), Support Vector Machine (SVM), Classification and Regression Trees (CART) and Našıve Bayes (NB) on an agricultural area in Tuscany (Italy). Four different scenarios were implemented in GEE combining different information such as optical and Synthetic Aperture Radar (SAR) data, indices and time series. Among the five classifiers used the best performers were RF and SVM. Integrating Sentinel-1 (S1) and Sentinel-2 (S2) slightly improves the classification in comparison to the only S2 image classifications. The use of time series substantially improves supervised classifications. The analysis carried out so far lays the foundation for the integration of time series of SAR and optical data
ROLE OF STROMAL FIBROBLASTS INTERACTION WITH PROSTATIC CANCER CELLS IN ACHIEVEMENT OF METASTATIC PHENOTYPE.
Beyond the complexity of tumour excision during partial nephrectomy: Ideation and histopathological validation of the Surface-Intermediate-Base (SIB) margin score
Pathological characteristics and prognostic impact of peritumoral capsule penetration in renal cell carcinoma after tumor enucleation
PHYSICAL ACTIVITY FOR MEN WITH CHRONIC PROSTATITIS/ CHRONIC PELVIC PAIN SYNDROME NOT SATISFIED WITH CONVENTIONAL TREATMENTS: COULD IT REPRESENT A VALID OPTION? THE PHYSICAL ACTIVITY AND MALE PELVIC PAIN TRIAL : A DOUBLE BLIND, RANDOMIZED STUDY
Carotid artery disease: Novel pathophysiological mechanisms identified by gene-expression profiling of peripheral blood
AbstractObjectThe pathogenesis of carotid artery stenosis (CAS) as well as the mechanisms underlying the different localisation of the atherosclerotic lesions remains poorly understood. We used microarray technology to identify novel systemic mediators that could contribute to CAS pathogenesis.Moreover, we compared gene-expression profile of CAS with that of patients affected by abdominal aortic aneurysm (AAA), previously published by our group.Methods and resultsBy global gene-expression profiling in a pool of 10 CAS patients and 10 matched controls, we found 82 genes differentially expressed. Validation study in pools used for profiling and replication study in larger numbers of CAS patients (n = 40) and controls (n = 40) of 14 genes by real-time polymerase chain reaction (RT-PCR) confirmed microarray results. Fourteen out of 82 genes were similarly expressed in AAA patients. Gene ontology analysis identified a statistically significant enrichment in CAS of differentially expressed transcripts involved in immune response and oxygen transport. Whereas alteration of oxygen transport is a common tract of the two localisations, alteration of immune response in CAS and of lipid metabolic process in AAA represents distinctive tracts of the two atherosclerotic diseases.ConclusionsWe describe the systemic gene-expression profile of CAS, which provides an extensive list of potential molecular markers
A comparison of hexaminolaevulinate (hexvix®) fluorescence cystoscopy and white light cystoscopy for the detection of bladder cancer: Results of the HeRo observational study
Tailoring Photoisomerization Pathways in Donor-Acceptor Stenhouse Adducts: The Role of the Hydroxy Group
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