pineal bodies usually contain a concretion called brain sand. concretion is mostly composed of phosphate and calcium carbonate. the concretion increases with age, however the origin and mechanism of formation of these materials are not clearly understood. calcified bodies are usually used as a guide in radiographic studies. due to the importance of these materials, this research was done on bra...

To improve the mechanical properties of calcareous sand, it is proposed that microbial induced calcium carbonate precipitation (MICP) technology be used. A series solidification tests were conducted in natural seawater and freshwater environments. The standard stress path static triaxial apparatus was used to conduct shear on sand solids under varying reinforcement conditions. composite power-e...

Three different outcrops are selected in this study, each representing a shallow-marine system with varying heterogeneity provided by siliciclastic–carbonate mixing that may form small or large stratigraphic trap. The impact of these styles mixed facies on CO 2 storage is relatively poorly known. This study demonstrates the significance systems for safe geological storage, as traps likely to be...

The results of the research on water mineralization, mineral composition, ash content, and organic matter content bottom sediments stagnant saline lakes in Southeastern Transbaikalia are presented. It has been established that various ratios feldspar, quartz, hydroxyl compounds, carbonate minerals universally found sediments. Sediments contain a small amount matter, which classifies them as hig...

—Contrary to the geological stereotype of pure-carbonate reef platforms, approximately 50% of shallow shelf area in the Tropics is accumulating siliciclastic and mixed siliciclastic-carbonate sediments. Taphonomic characterization of these settings is thus essential for assessing variation among major facies types within the Tropics, as well as for eventual comparison with higherlatitude settin...

Calcareous sand, as a blow-fill or construction material, is widely used in island and reef projects marine environments after treatment. When microorganism-induced mineralization to strengthen calcareous salinity other conditions the environment will adversely affect microorganisms their process. For this reason, two environmental created by deionized water simulated seawater were introduced e...

Using a soil improvement biotechnology based on microbial-induced carbonate precipitation (MICP) to form horizontal water barrier in foundation pit dewatering can not only achieve good control effect, but also the cost and obtain economic environmental benefits. In this study, taking Shanghai layer ⑨ sand as research object, solution injected into by MICP grouting technology includes bacterial ...

one of the ordinary methods to protect, rehabilitate, and enhance an ecosystemfunction in arid and semi-arid areas of the world is sand dune stabilization using biologicalpractices. plantation of species on the soil plays a great role in sustainable management ofthe ecosystem. this research studies the effects of cultivation of haloxylon ammodendronand atriplex canescens on physical-chemical ch...