The manufacture, disposal, and detonation of explosives have resulted in the pollution of large tracts of land and groundwater. Historically, 2,4,6-trinitrotoluene (TNT) is the most widely used military explosive and is toxic to biological systems and recalcitrant to degradation. To examine the feasibility of enhancing the ability of plants to detoxify the explosive TNT, we created transgenic tobacco (Nicotiana tabacum) constitutively expressing the nsfI nitroreductase gene from Enterobacter cloacae. The product of TNT reduction by the nitroreductase was found to be 4-hydroxylamino-2,6-dinitrotoluene (4-HADNT). Characterization of the transgenic lines in sterile, aqueous conditions amended with TNT demonstrated that these plants were able to remove all of the TNT from the medium at an initial concentration of 0.5 mM (113 mg L(-1)) TNT. In contrast, growth was suppressed in wild-type plants at 0.1 mM (23 mg L(-1)). Following uptake, transgenic seedlings transformed TNT predominantly to 4-HADNT and its high levels appeared to correlate with enhanced tolerance and transformation of TNT. Transformation products of TNT were subsequently conjugated to plant macromolecules to a greater degree in transgenic tobacco, indicating enhanced detoxification compared to the wild type.
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http://dx.doi.org/10.1080/15226510701603916 | DOI Listing |
Molecules
January 2025
Department of Law, University of Bergamo, Via Moroni 255, 24127 Bergamo, Italy.
Background: The detection of explosives in crime scene investigations is critical for forensic science. This study explores the application of laser desorption (LD) ion mobility spectrometry (IMS) as a novel method for this purpose utilising a new IMS prototype developed by MaSaTECH.
Methods: The LD sampling technique employs a laser diode module to vaporise explosive traces on surfaces, allowing immediate analysis by IMS without sample preparation.
Nanomaterials (Basel)
January 2025
Enikolopov Institute of Synthetic Polymer Materials Russian Academy of Sciences (ISPM RAS), Profsoyuznaya St. 70, 117393 Moscow, Russia.
The results of a comprehensive investigation into the structure and properties of nanodiamond soot (NDS), obtained from the detonation of various explosive precursors (trinitrotoluene, a trinitrotoluene/hexogen mixture, and tetryl), are presented. The colloidal behavior of the NDS particles in different liquid media was studied. The results of the scanning electron microscopy, dynamic light scattering, zeta potential measurements, and laser diffraction analysis suggested a similarity in the morphology of the NDS particle aggregates and agglomerates.
View Article and Find Full Text PDFAnn Surg Oncol
January 2025
Department of Colon and Rectal Surgery, Mayo Clinic, Rochester, MN, USA.
Background: The incidence of rectal cancer has decreased overall, but the incidence of early-onset rectal cancer (eoRC) has increased. Early-onset rectal cancer and late-onset rectal cancer (loRC) differ due to phenotypical, genetic characteristics, and higher stage presentations in eoRC. Thus, eoRC patients undergo more aggressive neoadjuvant treatments.
View Article and Find Full Text PDFAnn Intensive Care
January 2025
Department of Intensive Care, Erasmus MC, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
Background: Extubation failure is associated with an increased morbidity, emphasizing the need to identify factors to further optimize extubation practices. The role of biomarkers in the prediction of extubation failure is currently limited. The aim of this study was to investigate the prognostic value of cardiac (N-terminal pro-B-type natriuretic peptide (NT-proBNP), High-sensitivity Troponin T (Hs-TnT)) and inflammatory biomarkers (Interleukin-6 (IL-6) and Procalcitonin (PCT)) for extubation failure in patients with COVID-19 Acute Respiratory Distress Syndrome (C-ARDS).
View Article and Find Full Text PDFBiomarkers
January 2025
Department of Cardiology, The Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
Background: The Thrombolysis in Myocardial Infarction (TIMI) risk score estimates mortality for patients with ST-elevation myocardial infarction (STEMI). This study aimed to investigate whether biomarkers reflecting the neurohormonal response (pro-atrial natriuretic peptide (proANP), mid-regional pro-adrenomedullin (MR-proADM), and copeptin), inflammation (suppression of tumorigenicity 2 (ST2), C-reactive protein (CRP), and leukocytes), and troponin add prognostic value to the TIMI risk score.
Methods: This sub-study of the prospective PREDICT cohort included 1700 non-comatose and non-cardiogenic shock STEMI patients upon admission.
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