Tagetes lucida Cav. essential oil and the mixture of its main compounds are antibacterial and modulate antibiotic resistance in multi-resistant pathogenic bacteria.

We evaluated an essential oil (EO) of Tagetes lucida Cav. and the mixture of its main compounds against multi-drug resistant bacteria. We found that EO and the partially reconstituted blend of its main components have antibacterial activity and inhibit antibiotic resistance (ampicillin, chloramphenicol, nalidixic acid, vancomycin and imipenem) in strains of Staphylococcus aureus ATCC 29213 and Pseudomonas aeruginosa HIM-MR01.

Implications of the foliar phytochemical diversity of the avocado crop cv. Hass in its susceptibility to pests and pathogens.

Phytochemical diversity (PD) can be considered as a defensive trait; it can operate through single plant secondary metabolites or usually as complex mixtures of them. We tested the more diversity-better defense hypothesis correlating the leaf plant secondary metabolites (PSMs) with the incidence of plant enemies on Hass avocado trees. We expected a negative correlation between the occurrence of plant enemies and PD metrics.

Convolutional capture of the expansion of extra virgin olive oil droplets to quantify adulteration.

In this research, more than 302,000 images of five different types of extra virgin olive oils (EVOOs) have been collected to train and validate a system based on convolutional neural networks (CNNs) to carry out their classification. Furthermore, comparable deep learning models have also been trained to detect and quantify the adulteration of these EVOOs with other vegetable oils. In this work, three groups of CNN models have been tested for (i) the classification of all EVOOs, (ii) the detection and quantification of adulterated samples for each individual EVOO, and (iii) a global version of the previous models combining all EVOOs into a single quantifying CNN.

In Vitro Antifungal Activity of Plant Extracts on Pathogenic Fungi of Blueberry ( sp.).

Three pathogenic fungi of blueberry ( spp.) responsible for dieback disease, identified as , and , were isolated in the northwestern region of the state of Michoacán, Mexico. The mycelial growth in vitro of these fungi was inhibited by extracts from , and , medicinal plants collected in Sahuayo, Michoacán, Mexico.

Antioxidant Activity of the Essential Oil and its Major Terpenes of (Moc. and Sessé ex Benth.) Briq.

Background: The aim of this study was to investigate the antioxidant activity of (Moc. and Sessé ex Benth.) Briq.

Are body size and volatile blends honest signals in orchid bees?

Secondary sexual traits may convey reliable information about males' ability to resist pathogens and that females may prefer those traits because their genes for resistance would be passed on to their offspring. In many insect species, large males have high mating success and can canalize more resources to the immune function than smaller males. In other species, males use pheromones to identify and attract conspecific mates, and thus, they might function as an honest indicator of a male's condition.

Phenotypic Variations in the Foliar Chemical Profile of Persea americana Mill. cv. Hass.

The Hass avocado tree Persea americana cv. Hass was derived from a single hybrid tree of P. americana var.

Learned helplessness or expectancy-value? A psychological model for describing the experiences of different categories of unemployed people.

Various studies have explored the relationships between unemployment and expectation of success, commitment to work, motivation, causal attributions, self-esteem and depression. A model is proposed that assumes the relationships between these variables are moderated by (a) whether or not the unemployed individual is seeking a first job and (b) age. It is proposed that for the unemployed who are seeking their first job (seekers) the relationships among these variables will be consistent with expectancy-value theory, but for those who have had a previous job (losers), the relationships will be more consistent with learned helplessness theory.