We present the results of recent experiments on some physico-chemical effects induced by fast ion colliding with solids of relevance for the physics of planetary objects. The production of molecular solids, polymer-like materials and amorphous carbon by irradiation of frozen hydrocarbons and pentacene is discussed. We also report on a set of experimental results obtained irradiating methanol and water-methanol mixtures. Because of bombardment different species form. The techniques used for the analysis are "in situ" infrared (IR) and Raman spectroscopy. The experimental results are finally discussed in the light of their relevance for planetary physics.

Download full-text PDF

Source
http://dx.doi.org/10.1016/0273-1177(95)00194-jDOI Listing

Publication Analysis

Top Keywords

radiation chemistry
4
chemistry ices
4
ices planetological
4
planetological interest
4
interest low
4
low temperature
4
temperature experiments
4
experiments physico-chemical
4
physico-chemical effects
4
effects induced
4

Similar Publications

Development of a novel molecular probe for visualizing mesothelin on the tumor via positron emission tomography.

Eur J Nucl Med Mol Imaging

January 2025

Institute of Radiation Medicine, Fudan University, Xietu Road 2094, Shanghai, 200032, China.

Objectives: Mesothelin (MSLN) is an antigen that is overexpressed in various cancers, and its interaction with tumor-associated cancer antigen 125 plays a multifaceted role in tumor metastasis. The serum MSLN expression level can be detected using enzyme-linked immunosorbent assay; however, non-invasive visualization of its expression at the tumor site is currently lacking. Therefore, the aim of this study was to develop a molecular probe for imaging MSLN expression through positron emission tomography (PET).

View Article and Find Full Text PDF

The concept of inert matrix fuel (IMF) has been proposed to utilize the energetic value of Pu and transmute minor actinides in nuclear reactors. In order to offset the initial reactivity of nuclear fuel, gadolinium (Gd) is employed as a burnable poison, owing to its high neutron absorption cross-section. To gain insights into the radiation stability and influence of grain boundaries on irradiation behaviour, 5 mol% Gd-doped ceria samples, sintered at varying temperatures, were subjected to irradiation using 400 Kr ions.

View Article and Find Full Text PDF

Towards the Stable Chelation of Radioantimony(V) for Targeted Auger Theranostics.

Angew Chem Int Ed Engl

January 2025

Oak Ridge National Laboratory, Chemical Sciences Division, UNITED STATES OF AMERICA.

Antimony-119 (119Sb) is one of the most attractive Auger-electron emitters identified to date, but it remains practically unexplored for targeted radiotherapy because no chelators have been identified to stably bind this metalloid in vivo. In a departure from current studies focused on chelator development for Sb(III), we explore the chelation chemistry of Sb(V) using the tris-catecholate ligand TREN-CAM. Through a combination of radiolabeling, spectroscopic, solid-state, and computational studies, the radiochemistry and structural chemistry of TREN-CAM with 1XX/natSb(V) were established.

View Article and Find Full Text PDF

Layşmanyaz, yaklaşık 90'dan fazla ülke ve bölgeden bildirilen, ciddi ve endemik bir bulaşıcı hastalıktır. Kutanöz layşmanyaz (KL) ise vücudun açıkta kalan bölgelerinde oluşan, başlıca semptomları arasında vektör Phlebotomus ısırığından altı ay sonra kronikleşebilen veya kendiliğinden iyileşebilen ciltte tek, birden fazla ülserli veya nodüler lezyonlar bulunan, ölümcül olmayan ancak kalıcı izler bırakabilen bir hastalıktır. Klasik tedavi yöntemleri, uygulamada zorluk, direnç gelişimi ve yan etki gibi bir dizi soruna neden olmaktadır.

View Article and Find Full Text PDF

Coordination-driven metallo-supramolecular polymers hold significant potential as highly efficient catalysts for photocatalytic CO reduction, owing to the covalent integration of the light harvesting unit, catalytic center and intrinsic hierarchical nanostructures. In this study, we present the synthesis, characterization, and gelation behaviour of a novel low molecular weight gelator (LMWG) integrating a benzo[1,2-:4,5-']dithiophene core with terpyridine (TPY) units alkyl amide chains (TPY-BDT). The two TPY ends of the TPY-BDT unit efficiently chelate with metal ions, enabling the formation of a metallo-supramolecular polymer that brings together the catalytic center and a photosensitizer in close proximity, maximizing catalytic efficiency for CO reduction.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!