Ministry of Agriculture

About: Ministry of Agriculture is a government organization based out in Rio de Janeiro, Brazil. It is known for research contribution in the topics: Chemistry & Salmonella. The organization has 1153 authors who have published 1189 publications receiving 14442 citations.

Ein katalytischer Tüpfelnachweis von Äther

Abstract: Beim schnellen Verdampfen von Ather in einem Mikroproberohrchen hinterbleiben Atherdampfe, die bei 200° und Kontakt mit Luft ein Peroxyd bilden. Wenn diese Autoxydation, die durch Farbreaktionen mit geeigneten Reagenspapieren nachweisbar ist, an einem mit Kupferacetat/Benzidinacetat impragnierten Filterpapier erfolgt, so wird dieses intensiv blau. Es handelt sich hierbei um eine durch Atherperoxyd eingeleitete katalytische Beschleunigung der Oxydation des Benzidins zu seinem merichinoiden Oxydationsprodukt. Diese Katalyse kommt durch Eintritt und dauernde Wiederholung plausibler Teilreaktionen zustande.

Caracterización espacial de la sigatoka amarilla del banano e implicaciones en el muestreo

Abstract: Resumen es: La sigatoka amarilla, causada por el hongo Mycosphaerella musicola, es una enfermedad importante del banano (Musa spp.) diseminada ampliamente en Brasil....

Surto de carbúnculo sintomático em bezerros

Abstract: This report describes an outbreak of black leg in calves in Nova Uniao, Minas Gerais, Brazil, with emphasis in the use of different laboratorial techniques. Clostridium chauvoei was isolated in pure culture, and detected by a fluorescent antibody technique (FAT) and by a polymerase chain reaction (PCR) technique from pure culture obtained from affected skeletal muscle of one animal.

Photodegradation kinetics of lisdexamfetamine dimesylate and structure elucidation of its degradation products by LC-ESI-QTOF

Abstract: Herein, we investigate the photodegradation of lisdexamfetamine (LDX) in an aqueous solution. The experiment is carried out by exposing the drug in solution to UV radiation for different periods of time during 48 h. The fragmentation pattern of LDX is established, and its two degradation products are identified (DP-01 and DP-02) and structurally characterized via liquid chromatography coupled with hybrid quadrupole time-of-flight electrospray ionization (LC-ESI-QTOF) mass spectrometry. Furthermore, the photodegradation kinetics of LDX is determined via LC-ESI-QTOF (r = 0.9905; k = 0.0204 h−1; and t1/2 = 33.91 h) and RP-LC-CAD (r = 0.9960; k = 0.0234 h−1; and t1/2 = 29.67 h). LDX is found to be unstable in the presence of light under the evaluated conditions.