Management of Biogate-Fert Technique Based on a Simulation Model

Biogate-fert technique ensures to optimization of fertilizer and water units yield of the potato crop. There were two field tests conducted in the growing seasons. 2019-2020 and 2020-2021, at the research farm of the National Research Centre in Nubaria region, Egypt to study the management of biogate-fert technique based on a developed SALTMED model on potato crop under drip irrigation system in sandy soil conditions. According to the findings, the SALTMED model demonstrated its capacity to forecast soil moisture availability, yield, total dry matter, and nitrogen (ppm) for two growing seasons when using mineral and biogte- fert approaches., In order to maximize crop production and nitrogen levels, the model can calculate how much irrigation supply will be needed to move the soil moisture profile from a given soil moisture to a target soil moisture. Furthermore, accurate estimation of the solute and nutrient status and uptake at the same time is contingent upon accurate simulation of nitrogen and soil moisture

Complete genome sequence of Mycobacterium vaccae type strain ATCC 25954

Item does not contain fulltextMycobacterium vaccae is a rapidly growing, nontuberculous Mycobacterium species that is generally not considered a human pathogen and is of major pharmaceutical interest as an immunotherapeutic agent. We report here the annotated genome sequence of the M. vaccae type strain, ATCC 25954.1 november 201

Complete genome sequence of Mycobacterium vaccae type strain ATCC 25954

Item does not contain fulltextMycobacterium vaccae is a rapidly growing, nontuberculous Mycobacterium species that is generally not considered a human pathogen and is of major pharmaceutical interest as an immunotherapeutic agent. We report here the annotated genome sequence of the M. vaccae type strain, ATCC 25954.1 november 201

Influence of fluidized sand bed heat treatment on the performance of Al-Si cast alloys

The present study was undertaken to arrive at a better understanding of the effects of solution heat-treatment time and melt treatment on the microstructure and tensile properties of T6-tempered A356.2 and B319.2 cast alloys heat treated using a fluidized sand bed furnace (FB) as opposed to a conventional convection furnace (CF). The alloys investigated were subjected to solution heat treatment at 530 °C and 495 °C, respectively, for times ranging from 0.5 to 24 h, warm water quenching, and conventional T6 aging at 155 °C and 180 °C, respectively, for times of 0.5, 1, 5, 8 and 12 h. The results revealed that the tensile strength of these alloys is more responsive to an FB heat treatment than to a CF treatment for solution treatment times of up to 8 h. A significant increase in strength is observed in the FB heat-treated samples after short aging times of 0.5 h and 1 h, the trend continuing up to 5 h. Analysis of the tensile properties in terms of quality index charts showed that both modified and non-modified 319 and 356 alloys display the same quality, or better, after only 2 h treatment in a fluidized bed compared to 10 h using a CF treatment. The 319 alloys show signs of overaging after 8 h of aging using a CF, whereas with an FB, overaging occurs only after 12 h. The Si particle characteristics of the alloys investigated show that the smallest particle size is obtained after solution heat treatment using a fluidized sand bed, the optimum solution heat-treatment time being 0.5 h for modified alloys, and up to 5 h for non-modified alloys.Center of Excellence for Research in Engineering Materials, College of Engineering, King Saud University, Riyadh, Saudi Arabi

Predicting soil moisture distribution, dry matter, water productivity and potato yield under a modified ‎gated pipe irrigation system: SALTMED model application using field experimental data

The use of gated pipes in surface irrigation helps to reduce water losses commonly associated with the use of the traditional furrows. This study focused on predicting soil moisture content‎, total dry matter, crop yield and water productivity of potato crop using traditional and modified, self-compensating gate outlet (SCGO) gated pipe using the SALTMED model to explore the model suitability to identify the optimum and economic gate spacings. The traditional gated pipes are known to exhibit a range of pressure head variations along the pipeline causing a non-uniform discharge from orifices while the modified gate pipe system, known as compensating gated pipes (SCGO) stabilizes the pressure heads and produce more uniform water discharge along the pipe line. The effect of three gate spacings (0.7, 1.0 and 1.5 m) was studied in a field experiment that has been conducted for two successive seasons, 2011–2012 and 2012–2013. The SALTMED model has been applied and showed excellent agreement between the simulated and observed soil moisture, dry matter, yield and water productivity. Similar to the field results, the simulated values indicated that the modified (SCGO), with the 1.5 m gate spacing, gave the highest yield and water productivity. The modified gated pipe received less water than the traditional gated pipe, due to its high application efficiency. In addition to water saving, there is an economic benefit for using 1.5 m gate spacings as its cost is low (14 gates per 21 m pipe length) in comparison with 1.0 m and 0.7 m spacings. The results confirmed SALTMED ability to simulate with high precision, soil moisture, dry matter, water productivity and yield for potato under gated pipe irrigation. Therefore, the model can be used for design purposes to identify the optimum and economic gate spacings without the need to conduct expensive, costly and labor intensive field trials

Five mm laparoscopic varicocelectomy versus conventional varicocele ligation in young men with symptomatic varicocele: A randomized clinical study

Objectives: To compare the therapeutic success, morbidity and the costs of 5 mm laparoscopic varicocele ligation (LV) compared to inguinal varicocelectomy (IV). Patients and methods: Eighty patients with idiopathic symptomatic varicocele of grades I–III diagnosed by clinical examination and Doppler ultrasonography were randomly assigned to LV or IV (40 patients in each group). The mean patient age was 25.2 ± 1.4 (range 18–40) years. Of the 80 patients treated 21.3% had a left-sided varicocele, 70% had bilateral varicoceles and 8.8% a right-sided varicocele. Of 136 varicoceles, 37 (27.2%) were grade III, 51 (37.5%) grade II and 48 (35.3%) were grade I. The indications for varicocele ligation were: abnormal spermiogram in 47 patients (58.7%), scrotal pain in 19 (23.8%) and cosmetic impairment in 14 (17.5%). A total of 136 varicocele ligations were performed (67 IV and 69 LV). All patients were followed up for 4–8 months to assess early complications, testicular size, late complications and persistence or recurrence of the varicocele. Results: LV was associated with shorter operative time, shorter hospital stay and lower cost compared to IV. The overall incidence of postoperative complications including hydrocele, epididymitis and local pain was significantly higher among patients undergoing IV compared with LV (17.5% vs 5%). The incidence of persistent varicoceles was not significantly different between the 2 groups, but the varicocele recurrence rate was significantly lower in the LV compared to the IV group (5% vs. 17.5%, p ≤ 0.02). Conclusions: LV is a less invasive treatment than IV for managing male varicoceles. It is also associated with lower costs and better outcomes and should therefore be the preferred method of treatment for male varicoceles

Role of aluminium concentration on the structure behaviour of Cu-A1-alloys

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