Deir El-Gebrawi : volume I : the Northern Cliff

This work gives attention to decorated tombs of the northern group of cliffs composing Deir el-Gebrawi, the cemetery of the twelfth province of Upper Egypt and an important source of information on the history of the Old Kingdom Sixth Dynasty. Discrepancies are corrected between descriptions of the tombs in a 1902 publication, and many of the wall scenes and inscriptions not published in that work appear here for the first time

Mereruka and his family. Part II, the tomb of Waatetkhethor

Waatetkhethor, the eldest daughter of King Teti and wife of the vizier Mereruka, is the only woman buried in the Teti Cemetery who owned a separate chapel and burial chamber in her husband's mastaba. She held a very elevated status and her son, Meryteti, was described as 'eldest son of the king of his body' (see Part I of this publication). The book examines her special position and documents all the scenes and inscriptions in her chapel, both in line drawings and colour photographs, and produces architectural drawings of her tomb

The Tombs of Shepsipuptah, Mereri (Merinebti), Hefi and others : The Teti Cemetery at Saqqara : Vol. VII

76 page(s

The Tomb of Nikauisesi : the Teti Cemetery at Saqqara : Vol. 6

74 page(s

Dissolved organic matter in sea spray: a transfer study from marine surface water to aerosols

Atmospheric aerosols impose direct and indirect effects on the climate system, for example, by absorption of radiation in relation to cloud droplets size, on chemical and organic composition and cloud dynamics. The first step in the formation of Organic primary aerosols, i.e. the transfer of dissolved organic matter from the marine surface into the atmosphere, was studied. We present a molecular level description of this phenomenon using the high resolution analytical tools of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) and nuclear magnetic resonance spectroscopy (NMR). Our experiments confirm the chemoselective transfer of natural organic molecules, especially of aliphatic compounds from the surface water into the atmosphere via bubble bursting processes. Transfer from marine surface water to the atmosphere involves a chemical gradient governed by the physicochemical properties of the involved molecules when comparing elemental compositions and differentiating CHO, CHNO, CHOS and CHNOS bearing compounds. Typical chemical fingerprints of compounds enriched in the aerosol phase were CHO and CHOS molecular series, smaller molecules of higher aliphaticity and lower oxygen content, and typical surfactants. A non-targeted metabolomics analysis demonstrated that many of these molecules corresponded to homologous series of oxo-, hydroxy-, methoxy-, branched fatty acids and mono-, di- and tricarboxylic acids as well as monoterpenes and sugars. These surface active biomolecules were preferentially transferred from surface water into the atmosphere via bubble bursting processes to form a significant fraction of primary organic aerosols. This way of sea spray production leaves a selective biological signature of the surface water in the corresponding aerosol that may be transported into higher altitudes up to the lower atmosphere, thus contributing to the formation of secondary organic aerosol on a global scale or transported laterally with possible deposition in the context of global biogeocycling

Fast Monte Carlo simulator for the distribution of promptgamma emitters in protontherapy

International audiencePurpose: Real-time in vivo control of the ion range in a patient during protontherapy is a major challenge for Quality Assurance of treatments. A few years ago, prompt gamma rays have been investigated for beam range verification with proton1 and carbon ion beams2. Since then, several teams in the world have been progressing toward the construction of first clinical prototypes3,4,5. The imaging concept is usually designed and optimized with the help of Monte Carlo simulations (MC), which have become the gold standard for physical calculations especially for simulations of prompt gammas emitted by proton inelastic interaction in complex geometries. It remains however hindered by its slow statistical convergence

Tombs at Giza, Vol. II : Seshathetep/Heti (G5150), Nesutnefer (G4970) and Seshemnefer II (G5080)

A report on two tombs found at Giza: Kaiemankh (G4561) who held the offices of Superintendent of the Treasury and Superintendent of Priests; Seshemnefer I (G4940), the Royal Chamberlain, Priest of Heket, Judge and Administrator. This volume includes historical details on the occupant of the tomb, its date, inscriptions and architectural features, with descriptions and illustrations of the decorative schemes and pictorial scenes within the tomb

Chemical footprint of the solvent soluble extraterrestrial organic matter occluded in Soltmany ordinary chondrite.

By characterizing organic molecules of extra-terrestrial origin included in the Sołtmany meteorite, we also present the first results of the non-targeted chemical analysis of the methanol soluble organic matter present in an L6 ordinary chondrite. The structural characterization by means of ultrahigh resolution Fourier transform ion cyclotron mass spectrometry (FT-ICR-MS) with electrospray ionization (ESI) in negative and positive modes demonstrated an unexpected and astonishing chemical diversity with several thousand mass peaks that could be converted into C, H, N, O, S, and P elemental compositions. Molecular signatures were typically those of considerably oxygenated CHO and CHOS molecular series of primarily aliphatic character. 1H nuclear magnetic resonance (NMR) spectroscopy confirmed the prevalent existence of pure and functionalized aliphatic spin systems of intermediate chain length (C3-4 units), oxygenated aliphatics and a considerable diversity of oxygenated aromatics in the proton-based abundance ratio near 24 : 2 : 1. Although only residual organic matter allegedly survives in highly thermally altered L6 chondrites, the physical protection of organic matter in microcavities and traps between mineral surfaces might have supported and governed the chemistry with an apparent recalcitrance of extraterrestrial organic matter (EOM). Future studies of the organic matter in ordinary chondrites and its composition and structure in various regimes of (e.g.) temperature, radiation, pressure, and water content could shed light on these meteorites’ formation and evolution