Medical Researches
Moderately Effective
Based on 4 Researches
Magnesium enhances vascular preservationLow Calcium-High Magnesium Krebs-Henseleit Solution Combined with Adenosine and Lidocaine Improved Rat Aortic Function and Structure Following Cold Preservation.
Combination effects complicate results
We examined the effectiveness of modified Krebs-Henseleit (KH) solutions with low calcium and high magnesium levels on preserving vascular function during cold storage. Our focus was on whether adding adenosine and lidocaine could further improve the preservation of rat aortic rings after six days of cold preservation.
In our study, we found that traditional preservation solutions often fail to maintain proper vascular function after just three days of cold storage. However, when we tested a modified KH solution with lower calcium and higher magnesium, we observed significant recovery of contraction and relaxation functions in the aortic rings. This suggests that magnesium plays a vital role in preserving these functions.
Interestingly, while adding adenosine and lidocaine did not enhance contraction, it did improve the aortic rings' ability to relax in response to a chemical called acetylcholine. Furthermore, a histological examination showed that the addition of adenosine positively affected the endothelial lining and structural integrity of the vessels, highlighting its importance in cold preservation.
Overall, our findings suggest that magnesium in combination with adenosine significantly enhances the preservation of vascular structures and functionalities during extended cold storage, making it an important consideration for vascular grafts.
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Magnesium improves beef storage safetyIncorporation of hydrogen-producing magnesium into minced beef meat protects the quality attributes and safety of the product during cold storage.
Limited isolation of magnesium's impact
We explored the effects of incorporating hydrogen-producing magnesium into minced beef meat (MBM) to see how it affects quality and safety during cold storage. The study involved vacuum packaging the MBMs and storing them at 4°C for 12 days while comparing them with other treatments, such as gassing with hydrogen or nitrogen.
What we found was quite promising. The samples with magnesium showed the lowest browning index values, which indicates less color change and better visual quality. Additionally, these samples exhibited reduced bacterial counts, including mesophilic and psychrotrophic bacteria, as well as yeast and molds. This suggests that magnesium can help in maintaining the freshness and safety of the meat.
Interestingly, the magnesium treatment also limited the formation of potentially harmful compounds, such as thiobarbituric acid reactive substances and biogenic amines, which can negatively impact meat quality. By the end of the storage period, the control samples had the highest levels of volatile compounds, hinting at spoilage, while magnesium-enhanced and vacuum-packaged samples fared better.
Overall, we observed that using hydrogen-producing magnesium while handling minced beef could be an effective way to protect important quality attributes and safety during cold storage.
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CuMg alloys enhance cold workingProspective cold metal working and analysis of deformation susceptibility of CuMg alloys with high magnesium content.
Magnesium impacts alloy deformation
We examined the use of copper-magnesium (CuMg) alloys, particularly focusing on those with higher magnesium content, to understand how they perform during cold metal working processes. Our testing aimed to identify the effects of magnesium on the mechanical properties and workability of these alloys, as they’re known to provide significant solid-solution hardening.
The results revealed that CuMg alloys with 2 to 4 weight percent (wt%) magnesium displayed impressive strength characteristics, outperforming commonly used materials like pure copper and aluminum. We calculated improvements in hardness and Ultimate Tensile Strength (UTS), showing increases of up to two and a half times compared to pure copper. However, we noted that while magnesium enhances strength, it also raises friction during processing, which can complicate metal forming.
We learned that increasing magnesium content could lead to brittleness when it exceeded approximately 3.6 wt%, introducing challenges for cold working. This brittleness arises from the formation of specific phases, making it challenging to use these alloys in practical applications. Our findings suggest that while magnesium can significantly boost the mechanical properties of CuMg alloys, careful consideration is needed regarding its maximum content to maintain ductility and workability.
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We examined how incorporating fly ash into magnesium phosphate repair mortar (MPM) influences its effectiveness in cold environments. Our investigation revealed that fly ash modifies the microstructure of the MPM, enhancing its performance without affecting the setting time or fluidity significantly.
We discovered that adding 10% to 15% fly ash improves the mechanical strength, adhesion, water resistance, and stability of the mortar. Notably, we found that the curing temperature plays a critical role; as the temperature rises, compressive strength increases, while properties like flexural strength decrease.
Interestingly, even when cured in icy conditions at -20°C or 0°C, MPM with fly ash retains good early strength and strong adhesion properties. This suggests magnesium phosphate repair mortar modified with fly ash is suitable for emergency repairs in cold weather, showcasing its potential for use in challenging environments.
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