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Patricia Giovanella,Lídia de Azevedo Duarte,Daniela Mayumi Kita,Valéria Maia de Oliveira,Lara Durães Sette 한국미생물학회 2021 The journal of microbiology Vol.59 No.7
Soil contamination with diesel oil is quite common duringprocesses of transport and storage. Bioremediation is considereda safe, economical, and environmentally friendly approachfor contaminated soil treatment. In this context, studiesusing hydrocarbon bioremediation have focused on totalpetroleum hydrocarbon (TPH) analysis to assess process effectiveness,while ecotoxicity has been neglected. Thus, thisstudy aimed to select a microbial consortium capable of detoxifyingdiesel oil and apply this consortium to the bioremediationof soil contaminated with this environmental pollutantthrough different bioremediation approaches. Gas chromatography(GC-FID) was used to analyze diesel oil degradation,while ecotoxicological bioassays with the bioindicatorsArtemia sp., Aliivibrio fischeri (Microtox), and Cucumissativus were used to assess detoxification. After 90 days ofbioremediation, we found that the biostimulation and biostimulation/bioaugmentation approaches showed higher ratesof diesel oil degradation in relation to natural attenuation(41.9 and 26.7%, respectively). Phytotoxicity increased in thebiostimulation and biostimulation/bioaugmentation treatmentsduring the degradation process, whereas in the Microtoxtest, the toxicity was the same in these treatments as thatin the natural attenuation treatment. In both the phytotoxicityand Microtox tests, bioaugmentation treatment showed lowertoxicity. However, compared with natural attenuation, thisapproach did not show satisfactory hydrocarbon degradation. Based on the microcosm experiments results, we concludethat a broader analysis of the success of bioremediation requiresthe performance of toxicity bioassays.
Luca Giovanella,Gaetano Paone,Teresa Ruberto,Luca Ceriani,Pierpaolo Trimboli 대한내분비학회 2019 Endocrinology and metabolism Vol.34 No.1
Background: Postoperative routine radioiodine (RAI) treatment is currently debated for patients with low-risk differentiated thyroidcarcinoma (DTC) patients. If performed, a low 131I activity (i.e., 1 to 2 GBq) is recommended with the aim to ablate thyroid remnantand facilitate subsequent follow-up by thyroglobulin measurement. The purpose of this study was to evaluate the relationship between postsurgical technetium-99m (99mTc)-pertechnetate scintigraphy and the rate of successful remnant ablation after low activityradioiodine ablation in patients with DTC. Methods: Enrolled were 193 patients with low risk DTC who underwent total thyroidectomy and RAI ablation with a fixed 1.1 GBqactivity of 131I. 99mTc-pertechnetate scans were done and thyrotropin stimulated thyroglobulin (sTg) levels measured just before ablation. Ablation effectiveness was assessed 6 to 12 months later by sTg measurement, neck ultrasound and diagnostic whole body scan. Results: A negative 99mTc-perthecnetate scans was the best predictor of successful ablation (P<0.001) followed by preablative sTglevels <0.8 ng/mL (P=0.008) and 99mTc-pertechnetate uptake rate values <0.9% (P=0.065). Neither sex nor age of the patient at thetime of ablation or tumor histology and size showed a significant association with the rate of successful ablation. Conclusion: The 99mTc-pertechnetate scintigraphy is a simple and feasible tool to predict effectiveness of low activity 131I thyroid toablate thyroid remnants in patients with DTC.
Pierpaolo Trimboli,Luca Giovanella 대한내분비학회 2018 Endocrinology and metabolism Vol.33 No.2
Background: Calcitonin measurement is pivotal in the management of medullary thyroid carcinoma (MTC), but several pitfalls can affect its reliability. Other potential markers have been proposed, and procalcitonin (ProCT) has been reported as promising. The present study was undertaken to summarize the published data and provide more robust estimates on the reliability of ProCT as marker in the management of patients with MTC. Methods: The systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The sources comprised studies published through May 2018. Original articles that reported series of MTC patients undergone ProCT during postoperative follow-up were searched. A random-effects model was used for statistical pooling of the data. The I 2 index was used to quantify the consistency among the studies. The Egger test evaluated the possible presence of significant publication bias. Quality assessment of the studies was performed according to Quality Assessment of Diagnostic Accuracy Studies 2 (QUADAS-2). Results: According to inclusion and exclusion criteria five papers, reporting 296 MTC patients undergone ProCT evaluation, were finally selected. The number of MTC with recurrence was 140. The pooled sensitivity of ProCT in detecting recurrence was 96% (95% confidence interval [CI], 92% to 99%), with neither heterogeneity (I 2=0%) nor publication bias (Egger test, 3.16; P=0.99). The pooled specificity was 96% (95% CI, 87% to 100%) with mild heterogeneity (I 2=66.6%), while Egger test was not calculable. Conclusion: The present meta-analysis provides evidence that ProCT is reliable to manage MTC patients during their postoperative follow-up.
Pierpaolo Trimboli,Luca Giovanella 대한초음파의학회 2018 ULTRASONOGRAPHY Vol.37 No.2
Purpose: This study was undertaken to summarize the published data and to provide more robust estimates regarding the issue of core needle biopsy (CNB) for discriminating thyroid nodules with indeterminate fine-needle aspiration (FNA) results. Methods: The systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The sources comprised studies published through November 2017. Original articles that investigated CNB in indeterminate thyroid lesions were searched. A random-effects model was used for statistical pooling of the data. The I2 index was used to quantify the heterogeneity among the studies. The Egger test was carried out to evaluate the possible presence of significant publication bias. Quality assessment of the studies was performed according to QUADAS-2. Results: A total of 205 articles were retrieved, seven were initially selected, and the data of five papers were ultimately pooled in a meta-analysis. The overall cancer rate was 34%. The rate of cancers correctly diagnosed by CNB was 83% (95% confidence interval [CI], 76 to 89), with neither heterogeneity (I2 =25%) nor publication bias (Egger test, P=0.918). The rate of benign nodules correctly assessed by CNB was 84% (95% CI, 65 to 97), with significant heterogeneity (I2 =93.4%) and publication bias (Egger test, P=0.016). Conclusion: Evidence was found that CNB can correctly diagnose the majority of nodules previously read as indeterminate on FNA.
Dual-Color Electroluminescence from Dot-in-Bulk Nanocrystals
Brovelli, Sergio,Bae, Wan Ki,Galland, Christophe,Giovanella, Umberto,Meinardi, Francesco,Klimov, Victor I. American Chemical Society 2014 NANO LETTERS Vol.14 No.2
<P>The emission color from colloidal semiconductor nanocrystals (NCs) is usually tuned through control of particle size, while multicolor emission is obtained by mixing NCs of different sizes within an emissive layer. Here, we demonstrate that recently introduced “dot-in-bulk” (DiB) nanocrystals can emit two-color light under both optical excitation and electrical injection. We show that the effective emission color can be controlled by adjusting the relative amplitudes of the core and shell emission bands via the intensity of optical excitation or applied bias in the cases of photoluminescence (PL) and electroluminescence (EL), respectively. To investigate the role of nonradiative carrier losses due to trapping at intragap states, we incorporate DiB NCs into functional light-emitting diodes and study their PL as a function of applied bias below the EL excitation threshold. We show that voltage-dependent changes in core and shell emissions are not due to the applied electric field but rather arise from the transfer of charges between the anode and the NC intragap trap sites. The changes in the occupancy of trap states can be described in terms of the raising (lowering) of the Fermi level for reverse (direct) bias. We find that the applied voltage affects the overall PL intensity primarily via the electron-trapping channel while bias-induced changes in hole-trapping play a less significant role, limited to a weak effect on core emission.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2014/nalefd.2014.14.issue-2/nl403478s/production/images/medium/nl-2013-03478s_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl403478s'>ACS Electronic Supporting Info</A></P>