In plants, some fungi and some protests with the alternative oxidase (AOX) enzyme in the mitochondrial electron transport chain system, salicylhdroxamic acid acts as an inhibitor of the enzyme, blocking the largely uninhibited flow of electrons through AOX . The present study aims to investigate the influence of Hank's solution on the dissolution and passivation features of magnesium-based AZ91E alloy (biodegradable materials for temporary implant) with immersion time at 37°C. Furthermore, the feasibility to slow down the biodegradation (i.e. corrosion) of magnesium alloys to solve the rapidly corroding magnesium implant problems was demonstrated by studying the effect of adding Salicylhydroxamic acid to Hank's solution on the corrosion behavior of AZ91 alloy using electrochemical ( impedance and polarization) techniques .Also the biological activity of the tested solution was discussed.
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Energy security is one of the most pressing challenges of the 21 st century. A shift to next-generational fuels and increased use of renewable source of energy are increasingly being considered as viable options. Euphorbia lathyris L. is one of the most-suitable species that falls into the category of hydrocarbon yielding plants. This plant is suitable to grow in arid and semiarid climate. Fertilizer application plays a major role in the universal need to increase in agricultural production. Different mineral nutrients like boron (boric acid), copper (copper sulphate), iron (ferrous sulphate), magnesium (magnesium sulphate), manganese (manganous sulphate), molybdenum (ammonium molybdate) and zinc (zinc sulphate), were sprayed over the plants. There was an increase in the Hexane Extractables, Methanol Extractables and total extractable (Hexane Extractables and Methanol Extractables) at Mn, Zn, Fe, Cu, Mo, Mg and B in decreasing order over the control.
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availability to plants and soil surface crust. Carbonates, directly or indirectly, affect the chemistry and availability of N, P, K, Mg,Zn, Cu, and Fe (Obraza et al., 1993).Cultivation of calcareous soils presentsmany challenges, such as low water holding capacity, highinfiltration rate, poor structure, low organic matter and clay content, low CEC, loss of nutrients via leaching ordeep percolation, surface crusting and cracking, high pH andloss of nitrogen fertilizers, low availability of nutrients particularlyphosphorous and micronutrients, and a nutritional imbalance between elements such as potassium, magnesium and calcium (El-Hady and Abo-Sedera, 2006 and FAO, 2016).
Abstract— The presence of humic substances in biostimulants composition affect positively plantgrowth by the improvement of the cation exchange capacity of the soils (CEC) and also by theformation of water soluble complexes with ions which can be uptak en by roots. Biostimulantsimprove plant growth due to the cytok inin and humic acids present in their composition. Over theyears the use of these products has been increasing and it is necessary to conduct more studies toevaluate their efficiency in promoting plant growth. The aim of this research was to evaluate theeffect of biostimulants (Brotax Solo®, Naturvital®, PT4-O® and Brotax-5®), applied with andwithout mineral fertilization, on nutrient uptak e by maize and soybean plants. A greenhouseexperiment was conducted in Piracicaba, State of São Paulo, Brazil. Three-liter pots were filledwith 0-20 cm depth samples of Quartzipsamment soil. Base saturation was increased to 60% byapplying lime in the samples following incubation for 20 days at 80% the water retentioncapacity. After this period, mineral fertilizers were added to pots of specific treatments. Theapplied doses in L ha-1 were:Brotax Solo®: 0; 150 and 300; Brotax-5®: 0; 8 and 16; Naturvital®:0, 25 and 50; PT4-O®: 0; 0.5 and 1; referring to control, recommended dose by manufacturer and100% higher than this one, respectively. The products were diluted in water and they wereapplied in the pots 21 days after planting. Two months after planting, plant tops were collected,dried, weighted and nutrient contents in plants were determined. Data were subjected to analysisof variance (ANOVA) and means were compared by the LSD test (α = 0.05). Nutrient content inplants was higher in fertilized than in non-fertilized pots, for all products and crops. Ca and B;Zn; K; Ca and Mg contents were higher in maize plants treated with Brotax Solo®, Naturvital25®, PT4-O® and Brotax-5®, respectively. In soybean plants only the product PT4-O® showedincrement in Fe content. The amount of nutrients and humic acids in the studied products was notsufficient to increase significantly the amount of nutrients in the maize and soybean plants.
Diarrhoeal diseases due to enterotoxigenic Escherichia coli continue to be a cause of global concern. Medicinal plants have been gaining popularity as promising antidiarrhoeal agents. In the present study, four antidiarrhoeal plants, viz. Aegle marmelos, Cyperus rotundus, Psidium guajava and Zingiber officinale were screened against a heat- stable toxin-producing enterotoxigenic E. coli strain. Decoctions of these plants were studied for their effect on intracellular killing of the bacterial strain using murine monocytic cell line, J774. [ 3 H] thymidine release assay was
Tomato plants were grown in seedling trays were filled with sterilized perlite. Tomato seeds were germinated and grown hydroponically in pots containing 0.2 L of modified 1/10 Hoagland’s solution. Tomato plants with three biological replicates, each consis ting of one pot with ten plants were grown in a controlled environmental growth chamber with light of 250 mmol m –2 s –1 photosynthetic photon flux at 23-26 ⁰C, and with 50-60% relative humidity.
STZ diabetic rats showed significant increase in urea concentration in serum even after 12 d of STZ injection. After 1 mo period, the percent increase in serum urea concentration was of the order at 58.8% when compared with that of nondiabetic rats (Table 2). Very similar to the effect on SGOT and SGPT activities, alcoholic extracts of M. charantia, A. marmelos and E. jambolana showed dose- and duration-dependent decrease in serum urea concentration of STZ diabetic rats. At the end of 1 mo, the percent decrease in serum urea concentration with 250 mg and 500 mg/kg/d doses was 27.2% and 33.2% with M. charantia, 25.2% and 30.0% with A. marmelos and 22.9% and 25.6% with E. jambolana extracts. Glibenclamide (300 µg/kg) also decreased serum urea concentration by 30.6% during the same period (Table 2).
Effect of additive salt on eutectic mixture of Magnesium thermal cell (Lithium Chloride - Potassium Chloride) upon the performance of voltage production using anhydrous magnesium sulphate have been done by the mechanism of open thermodynamic system. Different weights of anhydrous magnesium sulphate have been used within eutectic mixture in presence constant amount of vanadium pent oxide. Different ratios of new eutectic mixtures have been examined relatively to the ambient operating temperatures and the activity of producing voltage of electrochemical systems in new system of thermal cells. Optimized ratio of eutectic mixture for voltage production have been choice relative to minimum ambient temperatures, and its operating temperature. Optimized weight of depolarizer in eutectic mixture of new Magnesium thermal cell have been studied.
Interesting quantity of dust deposited decreases sharply with increase in distance from cement plant. The main objective of this study is to assess the impact of dust given out by the nearby located cement plants on the physiochemical characteristic of the soil in their vicinity 5,6 . Further to
Results: There was significant difference between two studied groups in post chemotherapy sCr and Potassium (P<0.05); however, no significant difference was observed between two groups in serum magnesium and sodium levels (P>0.05). In terms of sCr, as nephrotoxicity index, the absolute risk of nephrotoxicity in patients receiving hydration with magnesium was 19% more than the other group. The relative risk of nephrotoxicity in patients receiving hydration with magnesium was 4.4 fold more than another group.
society, namely the protection of environment and meeting the infrastructure requirements of our growing population Structures which are constructed in aggressive environments are liable to be subjected to acidic attack. One of such major problems is sulphate attack against concrete structures due to which there will be loss of weight and reduction in strength of concrete. Contaminated ground water, seawater, industrial effluents are some of the sources of sulphate that attack on concrete. The use of blended cements have shown a sharp results in resisting the sulphate attack on concrete, sug arcane bagasse ash which shows pozzolanic properties is being used as a partial replacement in concrete in regular intervals of 5% upto 25%. SCBA is being produced from sugar manufacturing units as a waste material which will be grinded to the fineness les s than cement for obtaining good bonding between cement and SCBA. This project discusses the very severe exposure of magnesium sulphate on concrete. Bagasse is a by-product from sugar industries which is burnt to generate power required for different activities in the factory. The burning of bagasse leaves bagasse ash as a waste, which has a pozzolanic property that would potentially be used as a cement replacement material. It has been known that the worldwide total production of sugarcane is over 1500 million tons. Sugarcane consists about 30% bagasse whereas the sugar recovered is about 10%, and the bagasse leaves about 8% bagasse ash (this figure depend on the quality and type of the boiler, modern boiler release lower amount of bagasse ash) as a waste, this disposal of bagasse ash will be of serious concern. Sugarcane bagasse ash has recently been tested in some parts of the world for its use as a cement replacement material. The bagasse ash was found to improve some properties of the paste, mortar and concrete including compressive strength and
Gradient/monolithic coatings (Ti/TiCN/CrN, Ti/TiCN/TiAlN, Ti/DLC/DLC) were deposited onto magnesium alloy (Mg-Al-Zn) substrate by Cathodic Arc Evaporation method and Plasma Assisted Chemical Vapor Deposition method. A thin metallic layer (Ti) was deposited prior to deposition of gradient coatings to improve adhesion. The microstructure wear resistance and adhesion of the investigated coatings were studied. SEM micrographs showed that the deposited coatings are characterized by compact structure without delamination or defects and they closely adhere to each other. The critical load LC lies within the range of 8-17 N, depending on the coating type. The DLC coatings demonstrate the highest wear resistance. The good properties of the PVD gradient coatings make them suitable in various industrial applications.
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. Shahrouz Zamani Khalajabadi, Aminudin Bin Haji Abu, Norhayati Ahmad, Muhammad Azizi Mat Yajid, NorizahBtHjRedzuan, RozitaNasiri, Waseem Haider, ImanNoshadi: Bio-corrosion behavior and mechanical characteristics of magnesium titania- hydroxyapatite nanocomposites coated by magnesium-oxide flakes and silicon for use as resorbable bone fixation material. Journal of the Mechanical Behavior of Biomedical Materials77, 360-374 (2018).
In plantation trials, several authors have obtained significant improvements in the recovery rates, in very unfavorable environments, of many forest species such as chestnut (Strullu et al., 1986), oack (Boutekrabt et al., 1990), pine and hazel (Strullu and Plenchette, 1991). The contribution of fungi symbiotes improves the assimilation of water and nutrients by the plants and consequently contributes to an improvement in their recovery rate especially during the first months following their establishment in natural conditions (Nouaim, 1994). The establishment and multiplication of endomycorrhizal fungi in the roots of the argan plants are probably at the origin of root and vegetative mass development. The frequency and intensity of mycorhization of argan plants root after ten months of cultivation were 100% and 63.66%. The work of Nouaim et al. (1994) showed that the frequency and intensity of mycorrhization in argan plants multiplied in vitro by micro-propagation were respectively 95% and 60%.
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At present, magnesium is extracted from brine mainly by precipitation method . Alkali is added into the brine to produce magnesium hydroxide precipitate to separate magnesium from the brine through phase separa- tion, which is the most rapid and effective method . In this process, two core problems need to be addressed: one is the interference by calcium ions; and the other is the improvement of magnesium ion precipitation effi- ciency. In this study, the extents to which these two difficulties can be resolved are investigated through experi- ments using two chemicals, carbon dioxide (CO 2 ) and polyacrylamide (PAM).
Considering the percent control of reproduction as adopted by , it could be seen that, the applied acaricides was the most influential factor in this respect (Table 4). No precise relationship could be observed between the tested concentrations of acaricides and the percent control of reproduction. Rosemary and Black cumin had a great influence in reducing the reproduction of the female mites. The percent control of the reproduction resulted in 93.87 and 90.44% ; respectively. However, Ginger and Myrrh had a moderate effect in this respect as 60.14% and 40.25%.
In this work, we performed an in vitro crystallization study enabling the specification of kinetic and thermodynamic conditions of formation and growth of crystalline calcic phosphates species by changing the pH. We used inhibitors, which are medicinal plants which prevent, slow down or reduce crystallization phases. We chose the classical model for the study of phosphate crystallization without inhibitor and with it, in order to assess the inhibiting capacity of any chemical species used. The precipitation of the solid phase of phosphates from artificial urine at different initial pH values was the object of our investigation. The crystal size development was monitored by polarized microscopy at different time intervals. After crystallization time, the mixture was filtered, the recovered dried precipitates were analysed by FTIR spectroscopy and X-rays diffraction technique and chemical analysis. In the absence of inhibitor, the crystallization of phosphates at pH = 6.5, led to the formation of brushite (DCPD) and amorphous carbonated calcium phosphates (ACCP), after 6 hours. In presence of inhibitor at pH = 6.5, at lower concentrations of sage inhibition was partial. The addition of 1 ml of sage to the mixture decreases the size of crystal, after 4 hours the size of crystals stabilized at 20.67 µm. The complete disappearance of brushite crystals was obtained after addition of 10mL of Sage, only Pentahydrated octocalcic phosphates (POP) and ACCP were formed. In the presence of Camomile, the inhibition of brushite growth and aggregation increased. The addition of up to a volume of 20 mL of Camomile resulted in total inhibition and crystalline transformation of the ACCP into carbapatite (CA). Phosphate compounds encountered in urine can be dangerous and the use of inhibitors to prevent, slow down or reduce crystallization phases might be very helpful. In this investigation, Sage and Camomile proved to be good inhibitors. Their effect increases with solution pH but they are more efficient in less acidic or neutral urine than in alkaline one.
In order to find out the effect of formaldehyde on moisture ingress of oxysulphate cement, all the setting time blocks with different proportions of the additive were cured for 2 months under identical conditions and then subjected to boiling water for at least 30 hrs as per standard procedure in a closed steam bath. Their relative moisture sealing efficacies were then studied as a function of time. Moisture ingress and soundness are inversely proportional 37-40 . Results are shown in
thyroparathyroidectomized rats rendered magnesium deficient by dietary deprivation. Urinary magnesium excretion fell from a control of 15 to 3% of the filtered load after magnesium restriction. The loop of Henle, presumably the thick ascending limb, was the major modulator for renal magnesium homeostasis. The transport capacity for magnesium, however, was less in deficient rats than control animals. Absolute magnesium reabsorption increased with acute infusions of magnesium chloride but was always less in magnesium- deficient rats than control rats for any given filtered load, which suggests either a defect of a resetting of the reabsorption mechanism. Recollection micropuncture demonstrated that this was a characteristic of the loop of Henle. Proximal magnesium reabsorption remained unchanged at 15% of the filtered load and was unaffected by magnesium deficiency or acute magnesium repletion. Distal tubular magnesium reabsorption was limited during depletion and increased to a similar extent in control and deficient rats with enhanced magnesium delivery. Calcium reabsorption was not altered in magnesium deficiency; however, elevations of extracellular magnesium resulted in a specific inhibition of calcium reabsorption within the loop of Henle. These data suggest that overall control of renal magnesium reabsorption occurs within the loop of Henle and that the proximal tubule reabsorbs a constant fraction of the filtered load despite variations in body magnesium status.
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Numerous techniques have been developed for defluoridation of water. Numbers of scientists have performed experiments with various concentrations of fluoride and reducing that to a required permissible concentration considering the cost and resource availability factor. The research work related to fluoride concentration, its effect on human health and various techniques related to fluoride removal invented by various researchers around the world are discussed here. Excess fluorides in ground water cause serious environmental problems and health. The main source of fluoride accumulation is Geological formation.