Stromal Cell Ultrastructure

Regenerative medicine and tissue engineering therapies present an attractive treatment alternative to the current traditional clinical treatments. Stem cells are capable of self-renewal and multilineage differentiation. They also have the ability to create immunomodulatory microenvironment, and thus help to minimize organ damage caused by the inflammation and cells activated by the immune system. Human bone marrow mesenchymal stem/stromal cells (MSCs) have great potential for cellular therapy, as they possess the abilities to proliferate as well as to differentiate. MSCs are present in all tissues interacting with tissue cells and easy to isolate and expand in culture. Indeed, histological examination of MSCs is one of the main goals for studying their morphology. Both the light and the electron microscopes are essential tools where the histologist can identify the structure as well as the detailed ultrastructure of these cells. This will guide users to clearly understand their behavior, both in vivo and in vitro. Thus, the aim of this chapter is to give a spot of light on these cells and their histology

Modelling the Hepatitis C with Different Types of Virus Genome

Hepatitis C virus (HCV) is one of the leading known causes of liver disease in the world. The HCV is a single-stranded RNA virus. The genomes of HCV display significant sequence heterogeneity and have been classified into types and subtypes. Types from 1 to 11 have so far been recognized, each type having a variable number of subtypes. It has been confirmed that 90% approximately of the isolates HCV infections in Egypt belong to a single subtype (4a) [10]. In this paper, we construct a mathematical model to study the spread of HCV-subtype 4a amongst the Egyptian population. The relation between HCV-subtype 4a and the other subtypes has also been studied. The values of reproduction numbers R01, R02 have been derived [5]. Also, threshold conditions for the value of the transmission rates k1 and k02, in terms of R01, R02 and the mutation factor μ have been determined to insure that the disease will die out. If the conditions fail to happen the disease takes off and becomes endemic

Study of the Problem of Rising Groundwater levels in Aswan City Area

Aswan city, southern part of Egypt, is currently suffering from rising groundwater levels since 2009 due to partial discontinued pumping in some main well fields and growing urbanization in high relief areas; causing severe environmental problems hindering development activities. The present study aims to examine the changes in groundwater levels in the city using recorded data from 2012 to 2017. Numerical groundwater flow modeling is used to simulate the hydrogeological conditions of the region. Hence, the calibrated model is run to examine the solution of lowering groundwater. Inversing the groundwater rising process in the model is achieved by applying imposed abstraction rates, from eight well fields, equal to that before the rising levels problem. The adopted solution succeeded to nullify the rise in groundwater levels. However, further studies are recommended to evade negative geotechnical impacts so that the final design of an engineered solution can be set and physically implemented. Keywords: Groundwater management, Groundwater modeling, Groundwater de-watering, Nile Valley. DOI: 10.7176/CER/12-9-06 Publication date:September 30th 202

CRYPTOSYSTEM FROM MULTIPLE BIOMETRIC MODALITIES

One of the most important parts of cryptographic systems is key generation. Researchers, for a long time period, have been inventing ways to produce tough and repeatable cryptographic keys. Keys that had these features are hard to be memorized and may be stolen or lost. For this purpose using biometric features to generate cryptographic key is the best way. Most previous Researchers focused to extract features and generate key from an individual biometric, but it is hard to be used in multi stages cryptographic systems. Therefore, this approach is enhancing the cryptographic systems by using long and complex cryptographic keys that are hard to be guessed and do not need to be memorized and provide better usage in multi stages cryptographic systems by extracting features from multi biometrics, That provides accuracy 99.83% with time less than using individual biometric by 90%

The Free Amino Acid Composition of The Sudanese Fermented Camel's Milk (Garris)

      Many  workers   have   investigated  the  composition  of  milk and milk   proteins   of   various   species  of   domestic   animals   but   the information regarding  the composition of  fermented  camel 's   milk is  still  limited. The  fresh  camel  milk  contains 3.3-4.7% protein, 2.8 - 3.6%  fat, 4.0 - 5.2%  lactose,  0.7%  ash, 9.2 - 15.4% total solids,  and  to has  a  pH of  6.0-6.5  (Abdel  Rahim, 1987). The casein of camel  milk  is  richer  in  proline  and   threonine than cow's  milk, but poorer in alanine, arginine, glycine and serine (Hoeller and Hassan, 1965)

Radioprotective and anti-diabetic effects of Costus speciosus and carnosine

Purpose: To evaluate the possible radioprotective effect of Costus speciosus and carnosine as natural antioxidants in order to control the  hyperglycemia developed in male albino rats exposed to acute oxidative stress induced by gamma radiation. Methods: Twenty-eight adult male albino rats were divided into four groups. The first group was taken as a control group, while the three other groups were exposed to Ɣ irradiation at a single 7.5 Gy dose. Furthermore, the rats in the second and third groups were i.p. injected with Costus speciosus root powder and carnosine, respectively. On the 3rd day, after irradiation, the serum levels of glucose, insulin, C peptide, copper, iron, calcium, total antioxidant capacity (TAC) and malondialdehyde (MDA) were measureded. Results: The results revealed that exposure to Ɣ irradiation induced significant increases in serum glucose, iron, and malondialdehyde. However, the levels of serum calcium, copper, total antioxidant capacity and insulin significantly decreased (p < 0.05). A significant decrease was observed in Cpeptide in the exposed group, compared to control group. All the test parameters indicate improvement after treatment with Costus speciosus and carnosine (p < 0.05). Conclusion: Costus speciosus and carnosine ameliorate the effect of gamma radiation, indicating their role as antidiabetic agents and  radioprotectors; however, Costus speciosus was critically more efficient than carnosine. Keywords: Costus speciosus, Carnosine, Diabetes, Insulin, Gamma radiation protectio

Production and Quality Evaluation of Paste Made from Two Jawa Date Cultivars

The objective of the present work was to study the production of paste from the local Sudanese date cultivars namely; red Jawa and black Jawa. The date fruit samples were subjected to physical and chemical analysis before production of the paste. The chemical, microbiological and sensory characteristics of date paste were evaluated after processing. The results indicated relative increasing of moisture content in the red Jawa paste (RJP) 23.34% as compared with black Jawa paste (BJP) 20.35%, the ash content in the (RJP) and (BJP) were 1.15% and 1.09%, respectively. Protein content in the (RJP) and (BJP) were 1.75% and 2.04%, respectively. The total soluble solid in (RJP) and (BJP) were found to be 71.5% and 73.9, respectively. The titrable acidity in (RJP) and (BJP) were found to be 0.31% and 0.41% respectively. The pH values were found to be 5.13 and 5.35 in (RJP) and (BJP), respectively. The microbial analysis of date paste showed low levels of total microbial load. The sensory evaluation indicated that all the paste samples were highly accepted by panelists. The study recommended utilization of low quality date fruits like Jawa in production of various products to increase its economic value