Relationship between Surface Area Coverage of Flow-Aids and Flowability of Cohesive Particles

Poor and inconsistent flow of cohesive powders is a major issue in powder processing. A common solution is to coat the surfaces of the cohesive particles with finer particles, referred to as flow-aids. Such particles adhere to sticky surfaces and act as spacers preventing them from contacting each other and thus reducing the inter-particle forces and bulk powder cohesion. A question which naturally arises is how much flow-aid is needed to enhance the flowability to an optimum level. This work aims to establish a relationship between the degree of Surface Area Coverage (SAC) of flow-aids and the flowability, the latter as determined by a quasi-static shear cell method, as well as the angle of repose test and the FT4 powder rheometer. Glass beads of 90–150 μm sieve cut are made cohesive by silanising their surfaces with a commercial chemical reagent, Sigmacote® and are used as host particles. Two types of zeolite particles are used as flow aids. The mass fraction of the flow aids required to achieve a theoretical SAC of 1, 5, 10, 20, 50 and 100% is first estimated and then the host particles are coated in a pan mixer. The SAC is measured by Scanning Electron Microscopy, coupled with image analysis, and found to correlate well with the estimated value. The optimum surface coverage is found to be when SAC is 10–20%, as this provides the greatest flowability. An increase in SAC beyond this range leads to a gradual reduction in flowability

studying the functional characteristics of the outwear textile produced by various weaving technics

The study of the change in the shape of textiles in turn leads to a rigorous study of the structural compositions of the fabrics using geometric methods for the establishment of mathematical relations between structural installation agents on the one hand and fabric properties on the other hand, these were adopted Engineering methods are mainly based on theoretical hypotheses and on geometric models where the problem of research lies in the presence of many of the Twill fabrics produced under different labels and varieties with canonical stereotype specifications, but this research creates a mathematical relationship between the threads produced by some Different cotton spinning methods and the production of well-balanced twill fabrics with the calculations of the miseries and cover factor for the best laboratory and appropriate results with the functional performance of exterior cotton garment fabrics produced from the twill fabrics. The research presumes the possibility of arriving at a mathematical formula with a new constant, depending on the method of spinning and influencing on crimping in fabrics, and the research aims to study the effects of the sap on the aesthetic and functional characteristics of the producing fabrics, including the importance of research on the study of Woven structure Mathematically  and calculation of coverage of the products produced by search variables The research methodology is based on the analytical experimental approach of the research samples produced, The results of the research  are illustrated by the fact that by examining the mathematical relations and the calculation of the diameter  used in both warp and weft yarns, in turn to be able to assume all the mechanical and functional properties produced for textiles, ants are given mathematical, balanced fabrics suitable for the functional purpose used

Role of multislice CT and magnetic resonance cholangiography in preoperative evaluation of potential donor in living related liver transplantation

Purpose: The aim of this study was to evaluate the role of multislice CT (MSCT) and magnetic resonance cholangiography (MRC) in evaluation of potential donors in living related liver transplantation. Patients and methods: Twenty-five potential donors included in our study. All potential donors underwent 1st step medical examination and laboratory investigations to enter the 2nd step investigations with MSCT for calculation of the hepatic parenchymal CT density, reconstruction of hepatic vascular anatomy and CT volumetry. Magnetic Resonance cholangiography (MRC) and intra-operative cholangiography (IOC) were done on only 23 patients for biliary tree assessment. Results: Of the 25 patients evaluated by MSCT, 23 patients (92%) were accepted. Two patients (8%) were excluded from surgery because of anatomical criteria, regarding portal vein variants based on CT findings. One showed right anterior portal vein arising from left portal vein and the other showed trifurcation of the main portal vein. Conclusion: Multislice CT is a valuable tool in the evaluation of potential living liver donors that provides complete information on the hepatic vascular anatomy, the liver parenchyma, and volumetric measurements. MRC with a 3.0-T MR system demonstrates the preoperative biliary evaluation very well with a high accuracy rate

Human Cytomegalovirus Infection Enhances NF-κB/p65 Signaling in Inflammatory Breast Cancer Patients

<div><p>Human Cytomegalovirus (HCMV) is an endemic herpes virus that re-emerges in cancer patients enhancing oncogenic potential. Recent studies have shown that HCMV infection is associated with certain types of cancer morbidity such as glioblastoma. Although HCMV has been detected in breast cancer tissues, its role, if any, in the etiology of specific forms of breast cancer has not been investigated. In the present study we investigated the presence of HCMV infection in inflammatory breast cancer (IBC), a rapidly progressing form of breast cancer characterized by specific molecular signature. We screened for anti-CMV IgG antibodies in peripheral blood of 49 non-IBC invasive ductal carcinoma (IDC) and 28 IBC patients. In addition, we screened for HCMV-DNA in postsurgical cancer and non-cancer breast tissues of non-IBC and IBC patients. We also tested whether HCMV infection can modulate the expression and activation of transcriptional factor NF-κB/p65, a hallmark of IBC. Our results reveal that IBC patients are characterized by a statistically significant increase in HCMV IgG antibody titers compared to non-IBC patients. HCMV-DNA was significantly detected in cancer tissues than in the adjacent non-carcinoma tissues of IBC and IDC, and IBC cancer tissues were significantly more infected with HCMV-DNA compared to IDC. Further, HCMV sequence analysis detected different HCMV strains in IBC patients tissues, but not in the IDC specimens. Moreover, HCMV-infected IBC cancer tissues were found to be enhanced in NF-κB/p65 signaling compared to non-IBC patients. The present results demonstrated a correlation between HCMV infection and IBC. Etiology and causality of HCMV infection with IBC now needs to be rigorously examined.</p> </div