Efficiency of Bacillus mucilaginosus isolated from the soil in dissolving potassium in its microenvironment

Soil bacteria have an effective role in dissolving soil potassium. Bacillus mucilaginosus plays an effective role in dissolving potassium in the soil so that the plant may absorb it easily. The present study aimed to test the efficiency of bacteria in dissolving potassium present in the soil surrounding the roots of crops. B. mucilaginosus was isolated and diagnosed from the rhizosphere soil of Celery, Wheat, Basil and Alfalfa plants. The diagnosis included studying the isolates' culture, microscopic and biochemical characteristics. The laboratory study also included testing the efficiency of these bacterial isolates in dissolving potassium compounds in Modified Aleksandrov agar medium and estimating the dissolution coefficient. The results of isolation and identification of bacteria isolated from 19 out of 50 soil samples planted with different crops (Celery, Wheat, Basil and Alfalfa) showed that 8 isolates could dissolve potassium. The results of the microscopic examination of these eight isolates showed that they were sticky in shape, positive for Gram-staining, forming spores and the capsule, while the movement examination showed that they were positive for these tests (movement test). The biochemical tests and cultural characteristics showed that the eight isolates bear the characteristics of B. mucilaginosus. The results showed that the dissolution coefficient of potassium for the different isolates ranged between 2.28 and 1.14, while the type of sugar added to the culture medium increased the efficiency of bacterial isolates for potassium solubility. The study demonstrated the bacteria's efficiency in the rhizosphere region in dissolving potassium, which helps the plant use it easily.

Physiological and histological Study on liver of male albino rats treated with retinol drug (retain)

Isotretinoin, commonly known as 13-cis-retinoic acid, is a vitamin derivative used to treat severe acne and several types of skin, head, and neck cancer. According to certain research, isotretinoin causes apoptosis in a number of different types of bodily cells. In instances of clinically obvious acute liver injury with jaundice, isotretinoin has not been definitively linked. It is unknown how isotretinoin elevates serum aminotransferase levels, however, given that this effect seems to occur more frequently with a greater dose of medication, it may be a direct harmful impact. Methods: This study was conducted in the animal house in the College of Science / University of Babylon for the period from 22/11/2021 to 22/12/2021. The study included 40 white male albino rats (Rattus rattus) aged 2-3 months, weighing 100 to 150 g, and at a temperature of (25+3C) and 12 u (light-dark cycle) and then divided into eight groups, each group containing five rats. The animals were left before treatment for two weeks to acclimatize. After that, the rats were treated with Isotretinoin and they were given free water and a ration

APPROACHES TO PROVIDING DATA VISUALIZATION ON DEVICES USING MODERN REAL-TIME OPERATING SYSTEMS

The paper considers various approaches to developing display controller driver software for embedded systems, which usually use System-on-chip (SOC) solutions and real-time operating systems (RTOS). It also describes the main principles and design decisions of the chosen RTOS, such as portability, flexible scheduling, responsiveness, etc., as well as used standards (C language, POSIX 1003.1, ARINC 653). The authors list general operating principles of the display controller hardware including support for several displays and overlays that can be used for displaying multiple video streams on one screen or achieving the effect similar to chroma keying. The proposed method for developing display controller drivers defines the main parameters of the display controller hardware and the steps necessary to show an image on a screen correctly. The meth-od also takes into account the features related to using hardware interrupts and estimating the frequen-cy required for display controller to show an image on a screen correctly with the defined screen mode. Contrary to the known methods, the proposed method takes into account various features of the many real-time operating systems: lack of dedicated API to interact with graphics hardware and resources, seamless access to hardware registers from user space and so on. The paper considers several ap-proaches to debugging software on the target hardware as well as using prototyping systems based on FPGA. Prototyping systems usually introduce additional challenges to debugging, such as low simula-tion speed. The proposed method was tested during the development of the display controller driver for the home made RTOS.

SARS-CoV-2 vaccination modelling for safe surgery to save lives: data from an international prospective cohort study

Background: Preoperative SARS-CoV-2 vaccination could support safer elective surgery. Vaccine numbers are limited so this study aimed to inform their prioritization by modelling. Methods: The primary outcome was the number needed to vaccinate (NNV) to prevent one COVID-19-related death in 1 year. NNVs were based on postoperative SARS-CoV-2 rates and mortality in an international cohort study (surgical patients), and community SARS-CoV-2 incidence and case fatality data (general population). NNV estimates were stratified by age (18-49, 50-69, 70 or more years) and type of surgery. Best- and worst-case scenarios were used to describe uncertainty. Results: NNVs were more favourable in surgical patients than the general population. The most favourable NNVs were in patients aged 70 years or more needing cancer surgery (351; best case 196, worst case 816) or non-cancer surgery (733; best case 407, worst case 1664). Both exceeded the NNV in the general population (1840; best case 1196, worst case 3066). NNVs for surgical patients remained favourable at a range of SARS-CoV-2 incidence rates in sensitivity analysis modelling. Globally, prioritizing preoperative vaccination of patients needing elective surgery ahead of the general population could prevent an additional 58 687 (best case 115 007, worst case 20 177) COVID-19-related deaths in 1 year. Conclusion: As global roll out of SARS-CoV-2 vaccination proceeds, patients needing elective surgery should be prioritized ahead of the general population