Effects of initial vegetation heterogeneity on competition of submersed and floating macrophytes.

Non-spatial models of competition between floating aquatic vegetation (FAV) and submersed aquatic vegetation (SAV) predict a stable state of pure SAV at low total available limiting nutrient level, , a stable state of only FAV for high , and alternative stable states for intermediate , as described by an S-shaped bifurcation curve. Spatial models that include physical heterogeneity of the waterbody show that the sharp transitions between these states become smooth. We examined the effects of heterogeneous initial conditions of the vegetation types.

Modelling COVID-19 transmission dynamics in Laos under non-pharmaceutical interventions, vaccination, and replacement of SARS-CoV-2 variants.

Background: Understanding how the COVID-19 pandemic evolved under control measures is crucial to tackle the SARS-CoV-2 virus spread. Laos, a country bordering China but with late occurrence and low burden of COVID-19 compared to its neighbouring countries, was used for a case study.

Methods: A transmission model with disease reporting was proposed to investigate the impact of control measures on the SARS-CoV-2 virus spread in Laos from April 2021 to May 2022.

Modeling the Effects of Temperature and Limiting Nutrients on the Competition of an Invasive Floating Plant, , with Submersed Vegetation in a Shallow Lake.

The potential for a non-native plant species to invade a new habitat depends on broadscale factors such as climate, local factors such as nutrient availability, and the biotic community of the habitat into which the plant species is introduced. We developed a spatially explicit model to assess the risk of expansion of a floating invasive aquatic plant species (FAV), the water hyacinth (), an invader in the United States, beyond its present range. Our model used known data on growth rates and competition with a native submersed aquatic macrophyte (SAV).

Inadvertent Orbital Mitomycin C Injection as a Cause of Ptosis and Ophthalmoplegia from Orbital Necrosis.

Mitomycin C is an alkylating agent with the ability to suppress fibroblast proliferation and activity, making it a powerful antifibrotic. It has therefore become popular in glaucoma filtering surgeries, used both intraoperatively during bleb formation and postoperatively as an adjunct to bleb needling. This report presents a rare but serious risk of bleb needling with Mitomycin C at the slit lamp, where inadvertent movement of the patient resulted in an orbital injection.

Ocular manifestations and long-term complications of rhabdomyosarcoma in children.

Background/objectives: The purpose of the study was to describe the ocular manifestations of rhabdomyosarcoma in a large cohort of children.

Subject/methods: This was a retrospective observational cohort study. The medical records of all pediatric patients with head and neck rhabdomyosarcoma diagnosed between 1997 and 2021 at a tertiary-care pediatric hospital were analyzed.