A new species of Armascirus and description of the male of Scutopalus tomentosus from Brazil (Acari: Cunaxidae).

In this work, we describe the male of Scutopalus tomentosus Rocha, Skvarla & Ferla, 2013 and a new speciesArmascirus amazoniensis Wurlitzer & Silvasp. nov. from specimens collected on coconut crop, Cocos nuciferaL. (Arecaceae), cultivated in state of Pará, into the Amazonic biome, Brazil

Effective Area-Elasticity and Tension of Micro-manipulated Membranes

We evaluate the effective Hamiltonian governing, at the optically resolved scale, the elastic properties of micro-manipulated membranes. We identify floppy, entropic-tense and stretched-tense regimes, representing different behaviors of the effective area-elasticity of the membrane. The corresponding effective tension depends on the microscopic parameters (total area, bending rigidity) and on the optically visible area, which is controlled by the imposed external constraints. We successfully compare our predictions with recent data on micropipette experiments.Comment: To be published in Phys. Rev. Let

Phytoseiid mites associated with Asteraceae plants in the Pampa biome with description of two new species.

Abstract: he Brazilian Pampa is predominantly composed of native grasslands with riparian and thickets forest formations, with rich and little known biodiversity of fauna, flora and fungi. The objective of this study was to report phytoseiid species associated with Asteraceae plants from eight physiographic regions of the Pampa biome. Collections were carried out seasonally from November 2021 to August 2022. In each physiographic region, ten species of Asteraceae were collected, totalling 320 samples. Data analysis was mainly based on the relationship between mite and plant. A total of 228 mite specimens of Phytoseiidae were found, represented by 26 species within 12 genera and three subfamilies. Two new species, Amblyseius senecinis n. sp. and Typhlodromus (Anthoseius) bacchariae n. sp. are described and a key to species from the arizonicus group is provided. The most abundant species were Typhlodromalus aripo De Leon, followed by Euseius inouei (Ehara & Moraes), Phytoseius guianensis De Leon, Typhlodromus (Anthoseius) bacchariae n. sp. Neoseiulus californicus (McGregor), N. tunus (De Leon) and Metaseiulus (Metaseiulus) eiko (El-Banhawy)

Topography and instability of monolayers near domain boundaries

We theoretically study the topography of a biphasic surfactant monolayer in the vicinity of domain boundaries. The differing elastic properties of the two phases generally lead to a nonflat topography of ``mesas'', where domains of one phase are elevated with respect to the other phase. The mesas are steep but low, having heights of up to 10 nm. As the monolayer is laterally compressed, the mesas develop overhangs and eventually become unstable at a surface tension of about K(dc)^2 (dc being the difference in spontaneous curvature and K a bending modulus). In addition, the boundary is found to undergo a topography-induced rippling instability upon compression, if its line tension is smaller than about K(dc). The effect of diffuse boundaries on these features and the topographic behavior near a critical point are also examined. We discuss the relevance of our findings to several experimental observations related to surfactant monolayers: (i) small topographic features recently found near domain boundaries; (ii) folding behavior observed in mixed phospholipid monolayers and model lung surfactants; (iii) roughening of domain boundaries seen under lateral compression; (iv) the absence of biphasic structures in tensionless surfactant films.Comment: 17 pages, 9 figures, using RevTeX and epsf, submitted to Phys Rev

Cashew-apple (Anacardium occidentale L.) and yacon (Smallanthus sonchifolius) functional beverage improve the diabetic state in rats.

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Comparative performances of new KNN lead-free piezoelectric materials and classical lead-based ceramics for ultrasonic transducer applications

International audienc