Search results for "Pearl"

‘Internationalizing Pearl Craigie’

2018

International audience; My presentation focuses on Pearl Craigie (aka John Oliver Hobbes), arguably a key figure of cosmopolitan fin de siècle. Born in the U.S. but educated in Britain and partly in France, Craigie became overnight famous with Some Emotions and a Moral in 1891 although the novella was published in Fisher T. Unwin’s Pseudonymous Series. In 1892 Craigie converted to Catholicism while embarking on a series of tales, plays, journalistic contributions including travelogues, and novels with a noted internationalistic vein. If her position within British Decadence is arguably debatable, her cosmopolitanism is not: from her personal networks to her literary writings including her j…

Effects of polyphenols and lipids from Pennisetum glaucum grains on T-cell activation: modulation of Ca2+ and ERK1/ERK2 signaling

2015

International audience; BACKGROUND: Pearl millet (PM), i.e., Pennisetum glaucum, is widely grown in Africa and known for its anti-oxidant and anti-hyperlipidemic properties.METHODS: The P. glaucum grains were obtained from the region of Ouled Aïssa (South of Algeria). We assessed the effects of phenolic compounds and lipids, extracted from seeds of P. glaucum, on rat lymphocyte proliferation, activated by phorbol 12-myristate 13-acetate and ionomycin. In order to explore signaling pathway, triggered by these compounds, we assessed interleukin-2 (IL-2) mRNA expression and extracellular signal-regulated kinase-1/2 (ERK1/ERK2) phosphorylation. Finally, we determined increases in free intracell…

Characterization of molecular processes involved in the pearl formation in Pinctada margaritifera for a sustainable development of pearl farming indu…

2013

Tahiti’s pearl farming industry plays a major socio-economic role in French Polynesia. In an increasingly competitive market where the production of high quality pearls becomes essential, research can help secure and ensure sustainable production. In that context, Ifremer, in close collaboration with the “direction des resources marines” (French Polynesian government agency) has developed research projects on the “sustainable development of pearl farming”. This program is organized along 3 axes: (1) understanding the animal physiology and initiating a genetically selective breeding program of donor oysters; (2) understanding pearl oyster larvae dispersal and recruitment; (3) understanding t…

Author response: 'Palaeoshellomics’ reveals the use of freshwater mother-of-pearl in prehistory

2019

Identification of Chinese fresh-water pearls using MN2+ activated cathodoluminescence

2000

Fresh-water tissue graft-cultured pearls from China were investigated using hot cathode and cold cathode cathodoluminescence microscopes. Supplementary investigations were done using X-radiography, a Scanning Electron Microscope, an optical microscope, and an Atomic Force Microscope (AFM). The results were compared with those of natural fresh-water pearls from the Mississippi river. Thin sections of fresh-water natural pearls from the Mississippi river could be distinguished from those of fresh-water tissue graft cultured pearls from China using a hot cathode cathodoluminescence microscope according to the distribution of Mn2+ as follows: (1) Fresh-water tissue graft cultured pearls from Ch…

The Names of the ‘Pearl’ in the Old High German Glosses and Glossaries

2019

The essay will provide a scrutiny of the words merigrioz and perala occurring in the Old High German glosses to render the Latin words for ‘pearl’, i.e. unio and margarita, with the purpose of mapping the distribution and the contexts of use of the OHG words. The analysis will contribute to trace the origin of the German word for ‘pearl’, starting from the earliest stage of the language and – from a perspective of language contact – which takes into account the Latin counterparts of these OHG glosses.

Causal diagrams for empirical research

1995

Identifying Causal Effects with the R Package causaleffect

2017

Do-calculus is concerned with estimating the interventional distribution of an action from the observed joint probability distribution of the variables in a given causal structure. All identifiable causal effects can be derived using the rules of do-calculus, but the rules themselves do not give any direct indication whether the effect in question is identifiable or not. Shpitser and Pearl constructed an algorithm for identifying joint interventional distributions in causal models, which contain unobserved variables and induce directed acyclic graphs. This algorithm can be seen as a repeated application of the rules of do-calculus and known properties of probabilities, and it ultimately eit…

Spontaneous extrusion of male genital pearling

2021

Pearling is a practice of inserting small beads beneath the skin of the genitalia. Patients generally underwent this practice believing that this would have made their penis bigger and able to better satisfy their partners during intercourse. Pearling can cause complications. We report a case of spontaneous extrusion of genital pearling exiting in a granuloma of the inner face of the foreskin.

Bio-vaterite formation by glycoproteins from freshwater pearls

2010

Abstract A 48 kDa acidic and putative calcium-binding glycoprotein was isolated from pearls of the freshwater mussel Hyriopsis cumingii . This protein was compared with a related 46 kDa polypeptide, obtained from the nacreous shell of the same species. Separation by two-dimensional gel electrophoresis revealed that the difference in molecular weight is due to the higher extent of glycosylation of the 48 kDa protein existing in pearls. Evidence is presented that the sugar moieties of the protein contribute to crystal growth, starting with the nucleation step. In in vitro precipitation experiments, the 48 kDa glycoprotein of pearls directed the formation of round-shaped vaterite crystals whil…