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Marco Conte

Publications and source records attributed to Marco Conte.

5 recordsLinked to original sources
PubMed2006

Chemically induced fast solid-state transitions of omega-VOPO4 in vanadium phosphate catalysts.

Vanadium phosphates are important catalysts for the oxidation of alkanes, and commercial catalysts comprise a complex range of V4+ and V5+ phosphates. We used three complementary in situ characterization methodologies-powder x-ray diffraction and laser Raman and electron paramagnetic resonance spectroscopies-to show that the metastable phase omega-VOPO4 is very sensitive to many of the reactants and products of butane oxidation. A rapid transformation from omega-VOPO4 to delta-VOPO4 occurs on exposure to butane at the reaction temperature, and hence the metastable omega-VOPO4 may play a role in the formation of commercial catalysts.

Journal Article↗
PubMed2005

Umbilical metastases: current viewpoint.

BACKGROUND: Umbilical metastases from a malignant neoplasm, also termed Sister Mary Joseph's nodule, are not commonly reported in the English literature, and they have usually been considered as a sign of a poor prognosis for the patient. The present article reports on the current view point on umbilical metastasis besides discussing the epidemiology, clinical presentation, pathophysiology and treatment. METHOD: A search of Pubmed was carried out using the term 'umblic*' and 'metastases' or metastasis' revealed no references. Another search was made using the term "Sister Joseph's nodule" or sister Joseph nodule" that revealed 99 references. Of these there were 14 review articles, however when the search was limited to English language it yielded only 20 articles. Articles selected from these form the basis of this report along with cross references. RESULTS: The primary lesions usually arise from gastrointestinal or genitourinary tract malignancies and may be the presenting symptom or sign of a primary tumour in an unknown site. CONCLUSION: A careful evaluation of all umbilical lesions, including an early biopsy if appropriate, is recommended. Recent studies suggest an aggressive surgical approach combined with chemotherapy for such patients may improve survival.

Journal Article↗
PubMed2002

A novel, multiple drug-resistant, serotype 24F strain of Streptococcus pneumoniae that caused meningitis in patients in Naples, Italy.

Three adult patients in Naples, Italy, had meningitis due to multiple drug-resistant serotype 24F Streptococcus pneumoniae isolates. The 3 isolates were genetically indistinguishable and shared pbp2b and pspA sequence types with previously characterized penicillin-resistant clones. This serotype 24F strain was found to be the same clonal type as a previously characterized, penicillin-resistant serotype 14 strain. The novel strain has probably arisen through transformation of a serotype 14 strain with type 24F capsular biosynthetic operon sequences.

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