More Like this

1. Towards a nomenclatural clarification of the Peltigera ponojensis/monticola clade including metagenomic sequencing of type material and the introduction of P. globulata Miadl. & Magain sp. nov.

   https://doi.org/10.1017/S0024282923000373  

   Miadlikowska, Jolanta; Magain, Nicolas; Medeiros, Ian D.; Pardo-De la Hoz, Carlos J.; Carbone, Ignazio; LaGreca, Scott; Barlow, Thomas; Myllys, Leena; Schmull, Michaela; Lutzoni, François (September 2023, The Lichenologist)

   Abstract Peltigera globulata Miadl. & Magain, a new species in the P. ponojensis/monticola species complex of section Peltigera , is formally described. This clade was previously given the interim designation Peltigera sp. 17. It is found in sun-exposed and xeric habitats at high altitudes in Peru and Ecuador. Peltigera globulata can be easily recognized by its irregularly globulated margins covered mostly by thick, white pruina, somewhat resembling the sorediate thallus margins of P. soredians , another South American species from section Peltigera . The hypervariable region of ITS1 (ITS1-HR), which is in general highly variable among species of section Peltigera , does not have diagnostic value for species identification within the P. ponojensis/monticola complex. Nevertheless, no significant level of gene flow was detected among eight lineages representing a clade of putative species (including P. globulata ) within this complex. ITS sequences from the holotype specimens of P. monticola Vitik. (collected in 1979) and P. soredians Vitik. (collected in 1981) and lectotype specimens of P. antarctica C. W. Dodge (collected in 1941) and P. aubertii C. W. Dodge (collected in 1952) were successfully obtained through Sanger and Illumina metagenomic sequencing. BLAST results of these sequences revealed that the type specimen of P. monticola falls within the P. monticola/ponojensis 7 clade, which represents P. monticola s. str., and confirmed that the type specimen of P. aubertii falls within a clade identified previously as P. aubertii based on morphology. The ITS sequence from the type specimen of P. soredians , which superficially resembles P. globulata , confirms its placement in the P. rufescens clade. Finally, we discovered that the name P. antarctica was erroneously applied to a lineage in the P. ponojensis/monticola clade. The ITS sequence from the type specimen of P. antarctica represents a lineage within the P. rufescens clade, which is sister to the P. ponojensis/monticola clade. 

   more » « less
2. Synthesis and crystallographic characterization of 6-hydroxy-1,2-dihydropyridin-2-one

   https://doi.org/10.1107/S205698902300974X  

   Phillips, Sara K.; Brancato, Savannah G.; MacMillan, Samantha N.; Snider, Mark J.; Roering, Andrew J.; Hicks, Katherine A. (December 2023, Acta Crystallographica Section E Crystallographic Communications)

   The title compound, C₅H₅NO₂, is a hydroxylated pyridine ring that has been studied for its involvement in microbial degradation of nicotinic acid. Here we describe its synthesis as a formic acid salt, rather than the standard hydrochloride salt that is commercially available, and its spectroscopic and crystallographic characterization. 

   more » « less
3. Insights into the biology of the rat lungworm, Angiostrongylus cantonensis

   https://doi.org/10.1186/s13071-025-06790-3  

   Griffin, Chasen D; Ezenwa, Vanessa O; Cowie, Robert H (April 2025, Parasites & Vectors)

   Abstract Angiostrongylus cantonensisis a parasitic nematode with a complex life cycle involving rats as definitive hosts and gastropods as intermediate hosts. The parasite can infect other organisms, including humans, in which it causes neuroangiostrongyliasis, a globally emerging but neglected disease. This primer reviews the biology ofA. cantonensisincluding its life cycle and development in its natural, accidental, and paratenic hosts, as well as its expanding geographic distribution. It then considers recent advances inA. cantonensisresearch followed by exploring areas that are ripe for further investigation into this fascinating parasite. Graphical Abstract 

   more » « less
4. Improving Upon the generalized c-mu rule: a Whittle approach

   https://doi.org/10.1145/3764944.3764975  

   Li, Zhouzi; Gurushankar, Keerthana; Harchol-Balter, Mor; Scheller-Wolf, Alan (August 2025, ACM SIGMETRICS Performance Evaluation Review)

   Scheduling a stream of jobs whose holding cost changes over time is a classic and practical problem. Specifically, each job is associated with a holding cost (penalty), where a job's instantaneous holding cost is some increasing function of its current age (the time it has spent in the system since its arrival) and its class. The goal is to schedule the jobs to minimize the time-average total holding cost across all jobs. 

   more » « less
5. Wiener Indices of Minuscule Lattices

   https://doi.org/10.37236/12002  

   Defant, Colin; Féray, Valentin; Nadeau, Philippe; Williams, Nathan (January 2024, The Electronic Journal of Combinatorics)

   The Wiener index of a finite graph $$G$$ is the sum over all pairs $(p,q)$ of vertices of $$G$$ of the distance between $$p$$ and $$q$$. When $$P$$ is a finite poset, we define its Wiener index as the Wiener index of the graph of its Hasse diagram. In this paper, we find exact expressions for the Wiener indices of the distributive lattices of order ideals in minuscule posets. For infinite families of such posets, we also provide results on the asymptotic distribution of the distance between two random order ideals. 

   more » « less