Abstract:The newly of this research is using a low-cost method to prepare Mn2O3 nanoparticles via the co-precipitation technique with using two capping agents in order to enhance the optical properties by obtain a small particle size. The structural and optical features of the prepared nanoparticles were studied by examined X-ray diffraction, FE-SEM microscopy, energy dispersive X-ray analysis, and UV-Visible absorption spectra. The antimicrobial activity of Mn2O3 nanoparticles was examined using gm + ve Bacillus and E. coli. The results recommend that two different morphologies such as irregular plate nanoparticles or nanofiber were obtained at changing the capping agent from CTAB to PVP with a reduced particle size of the Mn2O3 nanoparticles (increase the surface area) for better antibacterial activity.
Abstract:Low gamma radiation was known to stimulate the biological activities and the defence mechanisms. This study was done to evaluate the properties of tomato fruits of gamma irradiated tomato seedlings. Seedlings were irradiated at 0, 2, 4 and 8Gy and harvested at 3 different dates. Data revealed that doses of 2 and 4 Gy had a significant positive effect on fruit number and yield. Moreover, only the dose of 2 Gy increased total soluble solids and ascorbic acid content while titratable acidity was decreased. All used doses were simulative for protein content, N%, K% and Fe content. Mn content increased in response to 2 Gy irradiation while, Zn was increased in response to 2 and 4 Gy. Irradiation showed no clear effect on P%. The harvest date had a significant enhancing effect on total soluble solids, ascorbic acid content, protein content in addition to all measured minerals of all seedlings parts and fruit. Finally, irradiation of tomato seedlings positively enhanced the chemical constituent and yield of their fruits with superiority of the dose of 2 Gy.
Abstract:Cadmium sulfide (CdS) thin films doped with various Zinc (Zn) concentrations (0, 2, 6, and 10 wt %) were deposited by flash evaporation technique onto cleaned glass substrates at room temperature. The effect of the Zn doping on the crystal structure, optical and electrical properties of CdS films were characterized. The structural properties of the films have been studied using X-ray diffraction and atomic force microscopy (AFM) techniques and the optical properties have been analyzed using the transmittance spectra of the films recorded in the UV visible range reveal. X-ray diffraction results presented that all the films are a hexagonal crystalline structure with (002) as the preferential orientation. Atomic Force Microscopy (AFM) analysis showed that the roughness values decrease with increase doping concentration. The band gap (Eg) of the film was found to increase from 2.43eV to 2.9eV with increase in Zn concentration. Hall measurements showed that all the films are n-type with carrier\'s concentration increasing from (1.30閼达拷1017) to (8.28閼达拷1017) cm-3.\n(C-V) characteristics of a hetero-junction for CdS-Zn/Si film showed that the built闁炽儲鎮唍 voltage increases with the increasing Zinc content.
Abstract:The influence of the multiwalled carbon nanotubes addition, to enhance the tensile strength and the micro-hardness of the lap weld seam between stainless steel AISI 304 and carbon steel DIN St. 33, is presented in this work by using an automated pulsed Nd:YAG laser. The mechanical behavior of the welds, which were executed with the addition of multiwalled carbon nanotubes compared with those produced with no multiwalled carbon nanotubes, was evaluated for the same used metals and work parameters. Experimentally, this work was performed by using the laser preplaced method to add the clad layer to the surface of St 33 before being welded with AISI 403. The effect of; laser peak power of (1.1 ?? 2.3 kW/ 0.3 kW interval), pulse duration of (5 -7 ms/ 0.5 ms interval), pulse repetition rate of (3 - 7 Hz/ 1 Hz interval), and welding speed of (0.5 ?? 1.7 mms-1/ 0.3 mms-1 interval), on the final results, were investigated using different testing techniques. The results showed that, the multiwalled carbon nanotubes addition enhanced the strength of the weld by 29% and the hardness by 50%, at; peak power of 1.7 kW, pulse duration of 7 ms, pulse repetition rate of 4 Hz, and welding speed of 0.5 mms-1.
Abstract:There are many types of approaches to detect gear faults. The method of novel adaptive feature extraction and optimized machine learning is applied to diagnose gear faults. Firstly, an alternative form of vibration signals is preprocessed by the energy entropy of the ensemble empirical mode decomposition (EEMD). Secondly, the effectiveness of the Backtracking Search Optimization Algorithm (BSA), being an evolutionary algorithm, is demonstrated through various benchmark problems. This paper presents a method relied on the BSA for optimizing the SVM parameters shortly called as the BSA-SVM. This is a new approach method applied in diagnosing gear faults. The experimental results prove that the proposed method operates highly effective and mostly feasible for identifying gear faults in practice. By applying this method, the results will be more accurate and will shorten the time cost.
Abstract:The objective of the current study was to include defatted rice bran in the formulation of beef burger patties to improve the quality attributes of the product. Beef burger patties were formulated by replacement of meat with defatted rice bran at rate 10%. Addition of defatted rice bran resulted in significant (P < 0.05) reduction in moisture content, fat content, shrinkage % and yellowness "b*" value with significant (P < 0.05) increase in ash content, dietary fiber content, moisture retention and fat retention. Moreover, burger patties formulated with defatted rice bran revealed improvement of the lipid stability with acceptable sensory scores throughout frozen storage period. From this study we can concluded that the defatted rice bran has good binding characteristics, antioxidant properties and can improve the nutritive value and extend the shelf life of meat products. Therefore, it can be safely used by meat processors to improve the quality and lower the coasts of manufacture of meat products.
Abstract:Have been studied mycobiota of honeybees and their an apiary up to species level which located in the ecologically different regions of Azerbaijan. Became clear that, 49 species of fungi was involved in the formation of mycobiota of materials from where were taken sampled. Among of registered fungi takes part those which lowering biological productivity of bees, as well as pathogens, toxigens and allergens that is dangerous in terms of that pollutes their products. This is also allows to note the an important task to preparation of normative documents that reflecting mycological safety principles of honey bee products
Abstract:Among various harmful constituents of coal dust, heavy metals stand prominent and their effects on miner’s health are not hidden from anyone. Present study evaluated the mean concentrations of heavy metals under study at different mining sites of Punjab Pakistan. This was an environmental cohort study where 100 miners were recruited, questions related to respiratory health were asked, and Pearson correlation analysis was performed to evaluate the joint association between heavy metals concentration and respiratory symptoms. We found mean concentrations of metals under study followed the decreasing trend from iron being highest to Cadmium being the lowest in all six mines with following sequence(Fe>Cu>Zn>Cr>Ni>Cd). As far as respiratory ailments were concerned Nickel was significantly correlated with the increasing risks of asthma (r=0.568**), excessive mucus production(r=0.475**), cough with sputum ( r=0.509**),chronic bronchitis (r=0.475**),pain in throat (r=0.465**),nasal congestion(r=0.377**), dyspnea (0.409**) ,wheezing (r=0.386*) and nasal irritation (r=0.416**).Similarly iron oxides exposure through coal dust was responsible for significant increase in asthma(r=0.317**), excessive mucus production(r=0.326**),chronic bronchitis (r=0.325*),pain in throat (r=0.303*) and nasal congestion (r=0.325*).Furthermore a positive significant association was present between faster breathing with copper (r=0.275**) and cadmium (r=0.363**). Asthma, excessive mucus production, chronic bronchitis, pain in throat, chest tightness, wheezing, dyspnea, phlegm, nasal irritation, episodic cough were showing a significant increase with increasing levels of cadmium and copper in coal dust
Abstract:The appropriate application of inhalers requires sufficient peak inspiratory flow (PIF) rate which might be cumbersome to achieve for some patients. Ambulatory adult asthma patients were enrolled in the study. The peak inspiratory flow rate was measured using the In-Check Dial measurement device. The patient‘s PIF rate was measured several times by recallibrating the device to mimic flow resistance of 3 different types of inhalers: 1) Diskus, 2) Turbuhaler, 3) Metered-dose inhaler (MDI). The patient underwent spirometry before and after the inhalation of a short-acting bronchodilator. From 100 asthma patients Diskus type inhalers were used by 20, Turbuhaler by 36, and MDI by 63 patients. 17 patients used other types of inhalers. Mean peak expiratory flow (PEF) rate was 406.99 l/min, mean forced expiratory ratio (FEV1%) – 87.53. Mean PIF rate using the In-Check Dial device simulating MDI flow resistance was 112 l/min, Diskus – 88.72 l/min, Turbuhaler – 75.86 l/min. 99% of patients reached the required minimal PIF rate (30 l/min) using all 3 types of inhalers. 27% of all participants didn’t reach the optimal PIF rate (>60 l/min) through the Turbuhaler type of inhaler, among them 11% were regularly using Turbuhaler inhalers. PIF rate was significantly lower in patients with severe and uncontrolled asthma. There was a positive correlation between PIF rate and FEV1, PEF values. A significant portion of adult asthma patients cannot reach the optimal PIF rate which might lead to ineffective treatment.
Abstract:Acetonic plant extracts Lantana camara, Ruta chalepensis, Rhazya stricta and Heliotropium bacciferum were tested in the laboratory for their insecticidal and repellent effectiveness to red flour beetle, Tribolium castaneum (Herbst). Four concentrations of each plant extract, 200, 300,400 and 500 ppm were tested. Adult beetles were exposed to plant extracts for 6 days. Percentage of mortality was recorded after 2, 4 and 6 days from exposure. The repellent effect of the previous plant extracts was also, studied. All of these plant extracts showed toxicities against red flour beetle. High mortality of T. castaneum was achieved by L camara and Ruta chalepensis at the concentration of 500 ppm for adult beetles. The rest of plant extracts increased mortality with increasing of concentrations. Of four plant extracts, the effect of L. camara and R. chalepensis were relatively more pronounced with LC50 values of 202.99 and 242, 95 ppm, respectively, after two days from treatment. Corresponding LC50 values after six days exposure for adult , values were 112.63 and 116, 75., respectively. The rest of plant extracts gives 172.48 and 289.67 ppm for Rhazya stricta and Heliotropium bacciferum respectively. Moreover, L. camara and R. chalepensis exhibited high repellency 100% and 92.08 % at concentration of 500 ppm against T. castaneum adults. The application of these extracts could be promising in protecting of stored date and grains against the attack of T. castaneum specially extracts of L. camara and R. chalepensis.