The most significant problem of electron paramagnetic resonance fingernail dosimetry is the presence of two signals of non-radiation origin that overlap the radiationinduced signal (RIS), making it almost impossible to perform dose measurements below 5 Gy. Historically, these two non-radiation components were named mechanicallyinduced signal (MIS) and background signal (BKS). In order to invest...

The matters which I shall discuss today will be largely concerned with the general problem of imbedding a coordinate manifold of class C in a euclidean space of sufficiently many dimensions. I imagine you all have a fair idea as to what is meant by an w-dimensional manifold of class C. Briefly this may be described as a Hausdorff space each point of which admits a neighborhood homeomorphic to t...

Infaunal soft-bottom invertebrates benefit from the presence of sediment, but sedimentation is potentially harmful for hard-bottom dwellers. Most sponges live on hard bottom, but on coral reefs in the Red Sea, the species Biemna ehrenbergi (Keller, 1889) is found exclusively in soft-bottom lagoons, usually in the shallowest part. This location is a sink environment, which increases the depositi...

Cyanobacteria represent one of the most common members of the sponge-associated bacterial community and are abundant symbionts of coral reef ecosystems. In this study we used Transmission Electron Microscopy (TEM) and molecular techniques (16S rRNA gene marker) to characterize the spatial distribution of cyanobionts in the widely dispersed marine intertidal sponge Hymeniacidon perlevis along th...

Sponges can provide potential drugs against many major world-wide occurring diseases. Despite the high potential of sponge derived drugs no sustainable production method has been developed. Thus far it is not fully understood why, when, where and how these metabolites are produced in sponges. For the near future sea-based sponge culture seems to be the best production method. However, for contr...

Oil Spill Remediation In article number 2100242 by Jing Lin, Xuelin Tian, and co-workers, a slippery sponge is prepared via surface grafting of highly flexible linear polydimethylsiloxane molecular brush, which can act as liquid-like lubrication layer throughout the three-dimensional network channels sponge. When dealing with crude oil spills, such exhibits simultaneously enhanced absorption de...

BLACK Luffa sponge, derived from dried fruits of Luffa aegyptiaca Mill. (Sponge gourd, Hindi – Ghiya tori), could be a suitable matrix for tissue culture in aseptic liquid culture media. To test this, the response of aroid Philodendron ‘Xanadu’ Hort., an exquisite indoor-ornamental with its beautiful leaves and tangled aerial roots, was studied in vitro by Gangopadhyay and others. A study on in...

We study Majumdar-Papapetrou solutions for the 3+1 Einstein-Maxwell equations, with charged dust acting as the external source for the fields. The spherically symmetric solution of Gürses is considered in detail. We introduce new parameters that simplify the construction of class C1, singularity-free geometries. The arising sources are bounded or unbounded, and the redshift of light signals all...