magnesium hydroxide
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Sayeh Ghorbanoghli ◽  
Seyyed Ali Mozaffarpoor ◽  
Mohammad Ali Vakili ◽  
Taghi Amiriani ◽  
Marzieh Qaraaty

Chronic constipation is a highly prevalent digestive problem in the community, which would decrease the quality of life of individuals. There is not any conclusive drug of choice for constipation. Golqand (combined Rosa × damascena Herrm. and honey) has been introduced as an effective safe laxative in Persian medicine (PM). This study aimed to investigate the effects of Golqand in comparison with Magnesium hydroxide suspension (MOM) in chronic constipation. In this clinical trial, fifty-six patients with chronic constipation were randomly assigned to the study groups of Golqand or MOM. Patients received Golqand (20 g daily) or MOM (40 mL daily) for 2 weeks. Patients took the drug twice a day, MOM group used it in the morning (20 mL) and at night before going to bed (20 mL). The Golqand group used it 10 g before lunch and 10 g before dinner, dissolved it in lukewarm water and swallowed. Then, they were followed for the second two weeks without any medication. The primary outcome was frequency of defecation. Patients were evaluated before the study and two weeks and four weeks after the beginning study. Estimated marginal mean frequency of defecation in the MOM group in the first two weeks was significantly higher than the Golqnd group (P < 0.05). There was no significant difference among the groups in the third week when treatment was discontinued (P = 0.155) but in the fourth week, the Golqand group had more count of defecation than the MOM group (P = 0.001). There was no significant difference between the two study groups in terms of treatment satisfaction and drug side effects (P > 0.05). Golqand medication can be used in the treatment of constipation with very few drug side effects and a more lasting effect than MOM drug.

2022 ◽  
Vol 2152 (1) ◽  
pp. 012045
Lan Ma ◽  
Weijie Lian ◽  
Huiming Wu ◽  
Lijun Zhang ◽  
Yuxin Zhai

Abstract The treating fluid in the piston of inner-cooling oil channel is acid wastewater containing copper ion, it would adversely affect the aquatic ecosystem when emission directly. This paper use magnesium hydroxide as a wastewater treatment agent, to study the effect of magnesium hydroxide dose, stirring time, temerature on the results of treating fluid treatment, and get the best treatment conditions. The results indicate that magnesium hydroxide has an excellent performance including easy operation, super removing rate, supernatant can meet emission standards: c(Cu2+)≤2mg/L.

2021 ◽  
Dong Xia ◽  
Hanbin Zhao ◽  
Sohei Kobayashi ◽  
Qi Mi ◽  
Aimin Hao ◽  

Abstract Black-odorous urban water bodies and sediments pose a serious environmental problem. Herein, we conducted microcosm batch experiments to investigate the effect of remediation reagents (magnesium hydroxide and calcium nitrate) on native bacterial communities and their ecological functions in the black-odorous sediment of urban water. The dominant phyla (Proteobacteria, Actinobacteria, Chloroflexi, and Planctomycetes) and classes (Alpha-, Beta-, and Gamma-proteobacteria, Actinobacteria, Anaerolineae, and Planctomycetia) were determined under calcium nitrate and magnesium hydroxide treatments. Functional groups related to aerobic metabolism, including aerobic chemoheterotrophy, dark sulfide oxidation, and correlated dominant genera (Thiobacillus, Lysobacter, Gp16, and Gaiella) became more abundant under calcium nitrate treatment, whereas functional genes potentially involved in dissimilatory sulfate reduction became less abundant. The relative abundance of chloroplasts, fermentation, and correlated genera (Desulfomonile and unclassified Cyanobacteria) decreased under magnesium hydroxide treatment. These results indicated that calcium nitrate addition improved hypoxia-related reducing conditions in the sediment and promoted aerobic chemoheterotrophy.

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 36
Tiefeng Zhang ◽  
Chunfeng Wang ◽  
Yongliang Wang ◽  
Lijun Qian ◽  
Zhidong Han

A polymer ceramic precursor material—polycarbosilane (PCS)—was used as a synergistic additive with magnesium hydroxide (MH) in flame-retardant ethylene–vinyl acetate copolymer (EVA) composites via the melt-blending method. The flame-retardant properties of EVA/MH/PCS were evaluated by the limiting oxygen index (LOI) and a cone calorimeter (CONE). The results revealed a dramatic synergistic effect between PCS and MH, showing a 114% increase in the LOI value and a 46% decrease in the peak heat release rate (pHRR) with the addition of 2 wt.% PCS to the EVA/MH composite. Further study of the residual char by scanning electron microscopy (SEM) proved that a cohesive and compact char formed due to the ceramization of PCS and close packing of spherical magnesium oxide particles. Thermogravimetric analysis coupled with Fourier-transform infrared spectrometry (TG–FTIR) and pyrolysis–gas chromatography coupled with mass spectrometry (Py–GC/MS) were applied to investigate the flame-retardant mechanism of EVA/MH/PCS. The synergistic effect between PCS and MH exerted an impact on the thermal degradation products of EVA/MH/PCS, and acetic products were inhibited in the gas phase.

2021 ◽  
Vol 14 (12) ◽  
pp. 1281
Laura Costa Pinho ◽  
Marta M. Alves ◽  
Bruno Colaço ◽  
Maria Helena Fernandes ◽  
Catarina Santos

In this work, magnesium hydroxide NPs were synthesized using water (Mg(OH)2 NPs) or a rose hip (RH) extract (Mg(OH)2RH NPs) and tested for the bone cells’ effects in co-cultured osteoblastic and osteoclastic cells, using a Transwell® insert system, allowing reciprocal cell paracrine interactions. Behavior of each cell population was characterized for typical phenotype markers, at days 1 and 6. Cell cultures treated with osteogenic/osteoclastogenic inducers were used as positive control of cell differentiation. The NPs presented a round shape morphology with an average diameter ~90 nm (Mg(OH)2 NPs) and below 10 nm (Mg(OH)2RH NPs. Both NPs induced osteoblastic and osteoclastic behavior similarly to that observed in induced osteoblastic and osteoclastic cultures (positive controls). Differences between the two types of particles were evident at the gene expression level. Compared to Mg(OH)2 NPs, the green-synthesized NPs greatly increased the expression of osteoblastic genes coding for the early markers ALP and collagen type 1 and the later transcription factor osterix, while decreasing the expression of osteoclastogenic genes, namely the essential transcription factor NFATC1, TRAP and the genes coding for the functional markers CA2 and CTSK. Overall, a positive added effect could be hypothesized for Mg(OH)2RH NPs with potential usefulness to promote bone formation in regenerative applications.

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