Simultaneous removal of chromotrope 2B and radionuclides from mixed radioactive process wastewater using organo-bentonite

The simultaneous removal of cationic radionuclides, 137Cs(I), 60Co(II) and 152+154Eu(III), and a chemically toxic anionic pollutant, the analytical reagent chromotrope 2B (C2B), from simulated mixed radioactive process wastewater (MRPWW) has been investigated using bentonite modified with cetyltrimethylammonium bromide. Modification was confirmed by elemental analysis, X-ray diffraction and infrared spectroscopy. Bentonite partially modified to 78% of the cation exchange capacity (PMB) was found capable to adsorb adequately both C2B and the radionuclides from aqueous solutions. Detailed batch kinetics and isotherm studies for removal of C2B singly and the radionuclides simultaneously were performed. The C2B and radionuclides kinetics conform to pseudo-first-order rate equation and the adsorption isotherms are treated with Freundlich and Langmuir models. Thermodynamic parameters were evaluated. Results suggest physisorption and ion-exchange as the principal uptake mechanism for C2B and the radionuclides, respectively. High simultaneous removal was obtained for C2B (≈ 100%) and each of the test radionuclides (>99%) from the simulated MRPWW

Saving Bones: a direct comparison of FTIR-ATR, whole bone percent nitrogen, and NIR

89th Annual Meeting of the American-Association-of-Physical-Anthropologists (AAPA), Los Angeles, CA, APR 15-18, 202

DNA evidence of bowhead whale exploitation by Greenlandic Paleo-Inuit 4,000 years ago

The demographic history of Greenland is characterized by recurrent migrations and extinctions since the first humans arrived 4,500 years ago. Our current understanding of these extinct cultures relies primarily on preserved fossils found in their archaeological deposits, which hold valuable information on past subsistence practices. However, some exploited taxa, though economically important, comprise only a small fraction of these sub-fossil assemblages. Here we reconstruct a comprehensive record of past subsistence economies in Greenland by sequencing ancient DNA from four well-described midden deposits. Our results confirm that the species found in the fossil record, like harp seal and ringed seal, were a vital part of Inuit subsistence, but also add a new dimension with evidence that caribou, walrus and whale species played a more prominent role for the survival of Paleo-Inuit cultures than previously reported. Most notably, we report evidence of bowhead whale exploitation by the Saqqaq culture 4,000 years ago.Full Tex

DNA evidence of bowhead whale exploitation by Greenlandic Paleo-Inuit 4,000 years ago.

The demographic history of Greenland is characterized by recurrent migrations and extinctions since the first humans arrived 4,500 years ago. Our current understanding of these extinct cultures relies primarily on preserved fossils found in their archaeological deposits, which hold valuable information on past subsistence practices. However, some exploited taxa, though economically important, comprise only a small fraction of these sub-fossil assemblages. Here we reconstruct a comprehensive record of past subsistence economies in Greenland by sequencing ancient DNA from four well-described midden deposits. Our results confirm that the species found in the fossil record, like harp seal and ringed seal, were a vital part of Inuit subsistence, but also add a new dimension with evidence that caribou, walrus and whale species played a more prominent role for the survival of Paleo-Inuit cultures than previously reported. Most notably, we report evidence of bowhead whale exploitation by the Saqqaq culture 4,000 years ago

Real-time 3D, 2D trans esophageal echocardiography for the evaluation of rheumatic mitral stenosis initial single center experience

Abstract: Mitral stenosis (MS) is one form of heart disease of a valvular nature. Narrowing of the mitral valve orifice occurs in the Mitral stenosis. The most common cause of MS is rheumatism fever. Other uncommon causes of MS are calcification of the mitral valve leaflets, congenital heart disease, infective endocarditis, mitral annular calcification, endomyocardial fibroelastosis. The study aims to determine the consistency and viability of using 3dimensional transthoracic echocardiography 3DTEE planimetry (MVA 3D) for mitral valve area (MVA) dimensions in patients that have rheumatic mitral stenosis (RhMS).: A cross-sectional study with analytic elements. The data collection was carried out in the Shahid Al- Mihrab outpatient department. Forty-one patient patients underwent Transesophageal echo (TEE) to eliminate atrial thrombi in the left side, referring to our outpatient department for echocardiographic examination and evaluation of RhMS and suitability for percutaneous mitral valvoplasty (PTMV). The investigator and administrator arranged a self-restricted survey form to collect data from the members by straight meeting with participants. Forty-one patients had MS due to rheumatic heart disease (RhHD), where all (100%) assess MVA measurement by 3DTEE. It was significantly low if compare with mitral valve area by transthorasic echo planimetry (MVA TTE planimetry), mitral valve area by transthorasic echo (MVATTEPHT). However, mitral valve area by continuity equation by transthoracic echo (MVAconTTE) measurement was feasible in 5 patients only (12%), were no significant correlation between them. Mitral valve area by transesophageal echo,3dimension (MVA3DTEE) the best agreement with MVA2DTTE PLANEIMETRY was demonstrated (95 percent agreement limits and then with MVAPHTTTE (95 percent agreement limits. The mean ± SD of MVA3D TEE was 1.06 ± 0.79 cm2 in patients with minimal fusion, the mean ± SD of MVA3DTEE was 0.79±0.21 cm2, in patients with partial fusion, and the mean ± SD of MVA3D TEE was 0.69 ± 0.15 cm2 with complete fusion. There was a significant difference in the mean MVA3D TEE among the different degrees of fusions by 3D TEE (p=0.02). Three-dimensional (3D) TEE echocardiography has demonstrated accuracy for measuring MV area for both calcific also improved the “description” of valve anatomy, and provided an advantage for less experienced operators as a method for MV area measurements

Investigation of Optimum Sustainable Designs for Water Distribution Systems from Multiple Economic, Operational, and Health Perspectives

Optimizing the design of water distribution systems often faces difficulties due to continuous variations in water demands, pressure requirements, and disinfectant concentrations. The complexity of this optimization even increases when trying to optimize both the hydraulic and the water quality design models. Most of the previous works in the literature did not investigate the linkage between both models, either by combining them into one general model or by selecting any representative solution to proceed from one model to another. This work introduces an integrated two-step framework to optimize both designs while investigating the reasonable network configuration selection from the hydraulic design view before proceeding to the water quality design. The framework is mainly based on a modified version of the multi-objective particle swarm optimization algorithm. The algorithm’s first step is optimizing the hydraulic design of the network by minimizing the system’s capital cost while maximizing the system’s reliability. The second step targets optimizing the water quality design by minimizing both the total consumed chlorine mass and the accumulated differences between actual and maximum chlorine concentrations for all the network junctions. The framework is applied to Safi Network in Yemen. Three scenarios of the water quality design are proposed based on the selected decision variables. The results show a superior performance of the first scenario, based on optimized 24-h multipliers of a chlorine pattern for a flow-paced booster station, compared to the other scenarios in terms of the diversity of final solutions

Evaluation of external root resorption concomitant with maxillary canine retraction assisted by micro-osteoperforation using a cone beam computed tomography: Clinical study

Aim: to calculate the impact of external apical root resorption (EARR) assisted by micro-osteoperforations (MOPs) throughout maxillary canine retraction. Patients and Methods: twenty cases; fifteen girls, five males (average age: 18.66 ± 3.27 years) who required as part of their treatment strategy, the extraction of at least one maxillary first premolar. They were received adjunctive therapy with MOPs. EARR was measured from CBCT before and after canine retraction. All gathered data will be tallied and subjected to statistical analysis. Results: A comparison between pre-treatment and post-retraction canine length with microosteoperforations (MOPs) showed that there was non-significant difference regarding root resorption. Conclusion: There was no remarkable effect on root resorption of the canine as the microsteoperforation facilitate the canine movement and reduced the whole retraction time