We study the wave breaking mechanism for the weakly dispersive defocusing nonlinear Schrödinger equation with a constant phase dark initial datum that contains a vacuum point at the origin. We prove by means of the exact solution to the initial value problem that, in the dispersionless limit, the vacuum point is preserved by the dynamics until breaking occurs at a finite critical time. In parti...

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DNA strand breaks that result in stalled or damaged replication forks can be detrimental to the DNA replication process. In this issue, Doksani et al. (2009) examine the impact of a single double-stranded DNA break on replication in the budding yeast, Saccharomyces cerevisiae.

In their intermediate host, parasites alter aspects of host physiology including waste production and body weight. Further, this alteration may differ between female and male hosts. To study this, a beetle (Tenebrio molitor)-tapeworm (Hymenolepis diminuta) system was used. Infected and uninfected male and female beetles were individually housed in vials without food. Each beetle's weight change...

Increased global production of animal-based protein results in high greenhouse gas (GHG) emissions and other adverse consequences for human planetary health. Recently, commercial insect rearing has been claimed a more sustainable source animal protein. However, this system also leaves residues called frass, which—depending on the diet—is rich carbon (C) nitrogen (N), could thus be used as ferti...

Abstract Larval frass in herbivorous lepidopterans is mainly composed of plant-derived material and microbes from the gut. Despite fact that conspecific larvae repels female moths Spodoptera littoralis oviposition, role volatiles on larval foraging behavior largely unknown. Here, we show S. walk upwind to a wind tunnel assay. We identified volatile guaiacol (2-methoxyphenol) as key ligand for o...

New limits on the Higgs mass from LEP and new calculations on the radiative (penguin) decay of the b-quark into sγ restrict the parameter space of the Constrained Minimal Supersymmetric Standard Model (CMSSM). We find that for the low tan β scenario only one sign of the Higgs mixing parameter is allowed, while the high tan β scenario is practically excluded, if one requires all sparticles to be...

We describe the immature stages and shelter building behavior of Falga jeconia ombra Evans, 1955 from eastern Ecuador. Chusquea scandens (Poaceae, Bambusoidea) is the larval food plant. Larvae in all stadia build shelters and forcibly eject frass with the aid of an anal comb. Later instars possess an eversible prothoracic "neck" gland. Larvae are associated with moving water.

Enterobacter cancerogenus is usually known as an opportunistic human pathogen. Recently, it has attracted great attention for its capability to produce bioemulsifier, degrade xenobiotics, and resist alkalis and antibiotics. Here we report the complete genome of Enterobacter cancerogenus YZ1, isolated from a bran-feeding Coleoptera insect's frass.

This study aims to determine the effect of addition mealworm frass and molasses on proximate value white oyster mushrooms. type research was an experiment using a completely randomized design (CRD) consisting four treatments with three replications each. Test parameters include water content, ash crude protein, fat fiber. Proximate data fiber were analyzed analysis variance (ANOVA) Tukey's foll...