The Interplay of Nitric Oxide and Nitrosative Modifications in Maize: Implications for Aphid Herbivory and Drought Stress.

Nitric oxide (NO) and other reactive nitrogen species (RNS) are considered to be signaling molecules in higher plants involved in the regulation of growth and development processes. However, the molecular mechanisms of their formation, removal, and participation in plant responses to adverse environmental stimuli remain largely unclear. Therefore, the aim of this study was to assess the influence of selected single stresses and combined stresses (i.

New Insights into Involvement of Low Molecular Weight Proteins in Complex Defense Mechanisms in Higher Plants.

Dynamic climate changes pose a significant challenge for plants to cope with numerous abiotic and biotic stressors of increasing intensity. Plants have evolved a variety of biochemical and molecular defense mechanisms involved in overcoming stressful conditions. Under environmental stress, plants generate elevated amounts of reactive oxygen species (ROS) and, subsequently, modulate the activity of the antioxidative enzymes.

Radioisotope examination in the evaluation of complications followed the implantation of joint prostheses.

Advances in orthopedic reconstructive and reparative techniques have resulted in a new population of patients suffering complications from these surgical procedures. Radionuclide examinations play an important role in the diagnosis of various types of complications following prosthesis implantation. Orthopedists can now choose from among several different radiopharmaceutic media: diphosphonates, gallium or labeled leukocyte.

Technetium-99m MIBI imaging in diagnosis of pelvic and abdominal masses in patients with suspected gynaecological malignancy.

Background: The aim of this study was to determine the diagnostic value of (99m)Tc MIBI planar dynamic scintigraphy in the diagnosis of gynaecological malignancies and to determine if it has a greater diagnostic accuracy than conventional ultrasound technique (US).

Material And Methods: A prospective trial was performed to assess the accuracy of (99m)Tc MIBI scintigraphy and ultrasound in 93 female patients (mean age 50, SD 16; range 17-82 years). Three readers assessed all the imaging independently and this was compared with histological examination in 89 cases and by clinical follow-up and correlative imaging for a minimum of 6 months in 4 patients.