Publications by authors named "Gambi A"

Article Synopsis
  • COVID-19, caused by the SARS-CoV-2 virus, has led to millions of deaths and significant lifestyle changes, particularly impacting patients with sepsis in ICUs, where septic complications have a high mortality rate.
  • A clinical study was conducted at SS Annunziata Hospital in Italy, analyzing ICU patients diagnosed with sepsis from 2018 to 2021, dividing them into groups based on the pandemic and COVID-19 status.
  • Out of 1,559 ICU admissions, 211 patients met the sepsis criteria, revealing high mortality rates, especially amongst COVID-19 patients, with a notable relationship between mortality and scores on APACHE III and SOFA assessments.
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Objectives: Standard of care sepsis biomarkers such as C-reactive protein (CRP) and procalcitonin (PCT) can be affected by several perinatal factors, among which perinatal asphyxia (PA) has a significant role. In this light, new early sepsis biomarkers such as presepsin (P-SEP) are needed to enact therapeutic strategies at a stage when clinical and laboratory patterns are still silent or unavailable. We aimed at investigating the potential effects of PA on longitudinal P-SEP urine levels.

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Humic substances (HS) possess redox active groups covering a wide range of potentials and are used by facultative anaerobic microorganisms as electron acceptors. To serve as suitable electron shuttles for anaerobic respiration, HS should be able to re-oxidize relatively quickly to prevent polarization of the surrounding medium. Mediated electrochemical oxidation and decolorization assays, based on the reduction of the radical ion of 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) allow to determine the electron donating capacity (EDC) of HS, but uncertainties remain about the reaction time that should be allowed to obtain environmentally meaningful EDC values.

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The equilibrium structure for 1-chloro-1-fluoroethene is reported. The structure has been obtained by a least-squares fit procedure using the available experimental ground-state rotational constants of eight isotopologues. Vibrational effects have been removed from the rotational constants using the vibration-rotation interaction constants derived from computed quadratic and cubic force fields obtained with the required quantum chemical calculations carried out by using both coupled cluster and density functional theory.

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The gas-phase infrared spectra of 1-chloro-1-fluoroethene (geminal chloro-fluoroethene, ClFC═CH, 1,1-CHClF) were recorded at medium resolution in the range of 400-6400 cm, and the vibrational analysis led to revised assignments for the ν (A″ symmetry), ν (A' symmetry), and ν (A' symmetry) bands. Besides the fundamentals, all the most important spectral features were interpreted in terms of overtone and combination bands, thus obtaining an accurate description of the vibrational structure of ClFC═CH. Accurate measurements of absorption cross-sectional spectra were carried out, and integrated band intensity data were determined.

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Difluoromethane (CH(2)F(2), HFC-32) is a molecule used in refrigerant mixtures as a replacement of the more environmentally hazardous, ozone depleting, chlorofluorocarbons. On the other hand, presenting strong vibration-rotation bands in the 9 μm atmospheric window, it is a greenhouse gas which contributes to global warming. In the present work, the vibrational and ro-vibrational properties of CH(2)F(2), providing basic data for its atmospheric modeling, are studied in detail by coupling medium resolution Fourier transform infrared spectroscopy to high-level electronic structure ab initio calculations.

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In this study we evaluated the activity of ABR preparation, a first-in-class agent obtained through fermentation process by genetically unmodified Bacillus spp., in breaking down polysaccharide produced by Streptococcus mutans, primary coloniser of tooth surface and abundant in dental biofilms. Our results showed that ABR preparation is able in degrading sugars formed by S.

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A deep and comprehensive investigation of the vinyl fluoride (CH(2)CHF) spectrum in the atmospheric window around 8.7 μm is presented. At first, the ro-vibrational patterns are modelled to an effective Hamiltonian, which also takes into account the coupling of the C-F stretching vibration, ν(7), with the neighbouring vibrational combination ν(9)+ν(12).

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The gas-phase infrared spectra of bromodifluoromethane, CHBrF(2), have been examined at medium resolution in the range of 200-9500 cm(-1). The assignment of the absorptions in terms of fundamental, overtone, combination, and hot bands, assisted by quantum chemical calculations is consistent all over the region investigated. Accurate values of integrated band intensities have also been determined for the first time in the range of 500-6000 cm(-1).

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Objective: Breast cancer patients with >3 involved nodes (N+) have a poor outcome. Chemotherapy (CT), alone or combined with endocrine therapy (ET) in hormone receptor (HOR)-positive patients, is the standard for these women. However, there are still questions surrounding the optimal adjuvant CT regimen.

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The gas-phase infrared spectrum of monodeuteromethyl bromide, CH2DBr, has been examined at medium resolution in the range 400-10000 cm(-1), leading to the identification of 70 vibrational transitions. The assignment of the absorptions in terms of fundamentals, overtones, combinations, and hot bands, assisted by quantum chemical calculations, is consistent all over the region investigated. The (79/81)Br isotopic splitting for the lowest fundamental nu6 and the value for the v8 = 1 level have been now precisely determined.

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The gas-phase infrared spectra of vinyl fluoride, H(2)C=CHF, have been examined at medium resolution in the range 400-8000 cm(-1). The assignment of the absorptions in terms of fundamental, overtone, and combination bands, assisted by quantum chemical calculations, is consistent all over the region investigated. Spectroscopic parameters, obtained from the analysis of partially resolved rotational structure of some bands, have been derived and compared with the corresponding calculated values.

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In this study, we evaluate the performance of a nucleic acid amplification assay, COBAS AMPLICOR (Roche Molecular systems) (PCR), compared to non-amplified DNA probe assay PACE2 (Gen-Probe Inc.) for the detection of C. trachomatis in a total of 2,916 samples (2,114 females and 802 males) consecutively collected in two different clinical pathology laboratories, over a period of three years.

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The randomized multicenter study on rapidly proliferating breast cancer, assessed according to thymidine labelling index (TLI), was activated at the end of the 1980s. The present work investigated whether and to what degree the short-term advantages observed from adjuvant CMF (cyclophosphamide, methotrexate, 5-fluorouracil) were maintained at a longer follow-up. Two hundred and eighty-one patients with node-negative and high TLI tumors were randomized to receive six cycles of CMF or no further treatment.

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The FTIR spectra of CH2[double bond]CHF have been investigated in the nu(8), nu(10), and nu(11) region between 750 and 1050 cm(-1) at a resolution of about 0.002 cm(-1). The nu(8) vibration of symmetry species A' gives rise to an a/b-type hybrid band, while the nu(10) and nu(11) modes of A' ' symmetry produce c-type absorptions.

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In two patients with chronic hepatitis B and myopathy, muscle biopsy showed necrosis and scarce inflammatory infiltrates. CD8+ cells surrounded some non-necrotic fibers. Hepatitis B virus (HBV) DNA and antigens were found inside intact muscle fibers.

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Guided by theoretical predictions, the rotational spectra of the mono- and bideuterated species of trans-1-chloro-2-fluoroethylene, CH35Cl=CDF, CH37Cl=CDF, CD35Cl=CHF, CD37Cl=CHF, CD35Cl=CDF, and CD37Cl=CDF, have been recorded for the first time. Assignment of the Delta J = 0 and Delta K(-1) = +1 bands with K(-1) = 3,4,5,..

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Equilibrium structures for the cis and trans isomer of 1-chloro-2-fluoroethylene are reported. The structures are obtained within a least-squares fit procedure using the available experimental ground-state rotational constants for various isotopic species of both forms. Vibrational effects were eliminated before the analysis using vibration-rotation interaction constants derived from computed quadratic and cubic force fields with the required quantum chemical calculations carried out using second-order Moller-Plesset perturbation as well as coupled-cluster (CC) theory.

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The molecular structures and energetics of diazomethyl (HCNN) and cyanomidyl (HNCN) radicals and their related cations (HCNN(+),HNCN(+)) and anions (HCNN(-),HNCN(-)) are reported at a high level of accuracy. The singles and doubles coupled-cluster method including a perturbational correction for connected triple excitations with systematic sequences of correlation consistent basis sets have been employed. Extrapolation to the complete basis set limit has been used with accurate treatments of core-valence correlation effects in order to accurately predict molecular properties, ionization potentials, electron affinities as well as C-H and N-H bond dissociation energies.

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For the first time the millimeter-wave spectra of the trans-35ClHC=CHF and trans-37ClHC=CHF isotopomers have been observed in natural abundance. Many DeltaJ=0, +/-1 DeltaK(-1)=+1 transitions for 35ClHC=CHF and DeltaJ=0 DeltaK(-1)=+1 transitions for 37ClHC=CHF have been detected and assigned. This allowed us to accurately determine the vibrational ground-state rotational constants, quartic and some sextic centrifugal distortion constants, and nuclear quadrupole coupling constants for both 35Cl and 37Cl.

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The gas-phase infrared spectrum of cis-1-bromo-2-fluoroethene has been studied at low resolution in the range 200-6500 cm(-1), leading to a complete assignment of the fundamentals, except the lowest vibrational mode nu9 predicted at 167 cm(-1). The remaining vibrational structure has been mainly interpreted in terms of first overtone or two quanta combination bands. Isotopic (79/91)Br shift has been observed only in the nu8 fundamental.

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We investigated a number of biological markers, evaluated under strict intralaboratory quality control conditions, in terms of their role in predicting clinical outcome of patients with colon cancer treated with 5-FU-containing regimens. Colon cancer tissue from 263 patients enrolled onto two randomised clinical trials were studied for their cytofluorimetrically determined DNA content and their immunohistochemically evaluated microvessel density, vascular endothelial growth factor expression, thymidylate synthase expression and tumour lymphocyte infiltration. Disease-free survival and overall survival of patients were analysed as a function of the different variables.

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The aim of this study was to investigate the smoking habits of a sample of second year high school students in Romagna (Northern Italy) by means of an anonymous self-administered questionnaire and the efficiency of a previous health education campaign. A sample of 2,691 16-year-old pupils (74% of the school population of this age) was randomly selected. Of these, 863 (32.

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