Sixteen carotenoids were isolated from the flesh of Brazilian red guavas (Psidium guajava L.). Their structures were established by means of UV-visible, 400 and 500 MHz (1)H NMR, 120 and 125 MHz (13)C NMR, mass, and circular dichroism spectra. The carotenoids were identified as phytofluene, (all-E)-, (9Z)-, (13Z)-, and (15Z)-beta-carotene, (all-E)-gamma-carotene, (all-E)-, (9Z)-, (13Z)-, and (1...

The study was designed to evaluate the hepatoprotective activity of P. guajava in acute experimental liver injury induced by carbon tetrachloride, paracetamol or thioacetamide and chronic liver damage induced by carbon tetrachloride. The effects observed were compared with a known hepatoprotective agent, silymarin. In the acute liver damage induced by different hepatotoxins, P. guajava leaf ext...

A simple and efficient protocol for recurrent somatic embryogenesis and plant regeneration is one of the prerequisites for genetic improvement of guava. An efficient reproducible regeneration somatic embryogenesis protocol was developed in four genotypes of Psidium guajava L. using immature zygotic embryo as starter explant. Somatic embryogenesis induction was obtained on MS basal medium supple...

Daun Psidium guajava adalah bahan baku alami yang mengandung senyawa bioaktif, salah satunya tanin. Tanin digunakan pada berbagai industri seperti tekstil, farmasi, kosmetik, dan makanan. Penelitian ini bertujuan untuk mempelajari pengaruh waktu ekstraksi rasio solid-liquid terhadap kandungan tanin ekstrak daun guajava. segar kering diekstraksi dengan etanol perbandingan 1/20 1/60 (b/v). Temper...

Berbagai jenis tanaman di Indonesia telah diketahui mengandung senyawa bioaktif yang dapat dimanfaatkan sebagai biopestisida. DIantaranya adalah bunga kecombrang dan daun jambu biji berfungsi larvasida. Tujuan dari penelitian ini mengetahui efektivitas campuran ekstrak etanol (Etlingera elaitor) (Psidium guajava) terhadap mortalitas larva Aedes aegypti. Objek dalam semua aegypti instar III beru...