[Plant extracts with cytostatic properties growing in Cuba. II]. / Extractos de plants con propiedades citostáticas que crecen en Cuba. Parte II.

The study of the cytostatic activity of aqueous, alcoholic and ketonic extracts from 18 parts of 9 species of superior plants of the families Araceae, Borraginacease, Burseraceae, Cesalpinaceae, Meliaceae, Compositae, Rebiaceae, Cruciferaceae and Verbenaceae using the microbiologic method of described by Kubas in 1972 is pursued. The best results were obtained from Hamelia patens. Lippia alba, Lepidium virginicum, Cassia ligustrina, Bursera simaruba and Heliotropium campechianum extracts.

[Plant extracts with cytostatic properties growing in Cuba. I]. / Extractos de plantas con propiedades citostáticas que crecen en Cuba. Parte I.

The cytostatic activity of aqueous, alcoholic and ketonic extracts of 9 species of superior plants of the families Fitolacaceae, Compositae, Moraceae, Zingiberaceae, Martiniaceae, Mirtaceae, Verbenaceae and Annonaceae was assessed. The Kubas microbiologic method and the fungus Ascomiceto Neurospora crassa were used in the assessment. The fungus growth was measured in millimeters. Inhibition percentages for every case regarding control are reported. The best results were obtained from Annona muricata, Costus spiralis, Cecropia peltata, Xanthium chinense and Pluchea adorata extracts.

[Biological evaluation of Cuban plants. II]. / Contribución a la evaluación biológica de plantas cubanas. II.

The study of the antimicrobial activity of aqueous, alcoholic and ketonic extracts from different parts of five superior, dried, grinded and defatted plants of the families Myrtaceae, Polypodiaceae and Zingiberaceae is pursued. Good results were obtained from Psidium guajaba leave and stem ketonic extracts as well as from Costus spicatus leave and root alcoholic extracts.

[Biological evaluation of Cuban plants. III]. / Contribución a la evaluación biológica de plantas cubanas. III.

Aqueous, alcoholic and ketonic extracts were prepared from different parts of species of the families Martiniaceae, Caricaceae, Umbeliferae, Nictaginaceae and Fitolacaceae in order to prove their antimicrobial action on bacteria which have a clinical interest in humans and live in our environment. The gel double-layer diffusion method was applied. The best results were obtained from Carica papaya leave extracts.

[Biological evaluation of Cuban plants. V]. / Contribución a la evaluación biológica de plantas cubanas. V.

The study of the antimicrobial activity of aqueuos, alcoholic and ketonic extracts from plants growing in Cuba is pursued. Six species of the families Rutaceae, Portulacaceae, Borraglinaceae and Jasminaceae were analyzed, and their activity on bacteria with a human clinical interest was assessed. The best results were obtained from Heliotropium campechianum, Jazminum sambac and Portulaca oleracea.

[Biological evaluation of Cuban plants. IV]. / Contribución a la evaluación biológica de plantas cubanas. IV.

Aqueous, alcoholic and ketonic extracts from leaves and stems of plants of the families Malvaceae, Anonaceae, Punicaceae, Verbenaceae and Urticaceae were analyzed in order to prove their antibacterial proprieties. The best results were obtained from Punica granatum extracts which inhibited over a 50% of bacteria.

[Biological evaluation of Cuban plants. I]. / Contribución a la evaluación biológica de plantas cubanas. I.

Aqueous, alcoholic and ketonic extracts from five species of superior plants of the families Papilonaceae, Euforbiaceae, Moraceae, Piperaceae and Solanaceae were assessed from an antibacterial viewpoint using the gel double-layer diffusion method with cylindric sections. Values of inhibition areas are depicted in diameter millimeters. The best results were obtained from Desmodium barbatum extracts.

[Biological evaluation of Cuban plants VI]. / Contribución a la evaluación biológica de plantas dubanas. VI.

The study of the antibacterial activity of plants growing in Cuba is pursued. Aqueous, alcoholic and ketonic extracts were prepared from five species, and it was found that the best inhibitions corresponded to the species Hamelia patens, Nephrolepis acuminata, Calocarpum sapota and Colocasia antiquorum.

[Modified Lassen's method for the identification of gram negative bacilli]. / Modificación del método de Lassen para la identificación de bacilos gramnegativos.

A variation of the components of media used by Lassen for the identification of clinically significant gram-negative bacilli is performed in pursuit of an economically accessible method that can be introduced in daily laboratory work.

[Verification of Lassen's modified method for the identification of gram negative bacilli]. / Verificación del método de Lassen modificado para la identificación de bacilos gramnegativos.

Eighty strains of gram-negative bacilli, according to Lassen's modified method, and the conventional methods for their identification are studied. Lassen's original dichotomic keys, with which satisfactory results were obtained in relation to conventional methods, are presented. Reliability and greater accurateness of such a modification were shown.