The effects of aluminum loading on selected tissue calcium and magnesium concentrations in rats

1984 ◽  
Vol 6 (6) ◽  
pp. 531-535 ◽  
Author(s):  
Maria A. Burnatowska-Hledin ◽  
Gilbert H. Mayor
Keyword(s):  
Tissue Calcium ◽  
Calcium And Magnesium

scholarly journals SPECIFIC ION SELECTIVITY OF `FORMOSA' AZALEA IRRIGATED WITH SALINE WATER SOURCES

HortScience ◽  
1990 ◽  
Vol 25 (8) ◽  
pp. 862f-862
Author(s):  
E.W. Bush ◽  
J.T. Payne
Keyword(s):  
Water Quality ◽  
Plant Growth ◽  
Root Growth ◽  
Saline Water ◽  
Ion Selectivity ◽  
Negative Relationship ◽  
Leaf Tissue ◽  
Irrigation Water Quality ◽  
Tissue Calcium ◽  
Calcium And Magnesium

Container-grown `Formosa' azalea plants were affected by irrigation water quality. Sodium (200 ppm), supplied by NaHCO3 and NaCl, inhibited plant growth and diminished plant quality. Observable symptoms were tip-burn, marginal necrosis, leaf curling, and eventual defoliation. There was a negative relationship between leaf tissue calcium and magnesium and higher rates of sodium from NaHCO3. Leaf tissue Cl levels were higher in the higher NaCl treatments. Sodium treatments inhibited root growth. Plants in NaHCO3 treatments accumulated more Na than did plants in NaCl treatments. Media pH and sodium levels following 12 months of sodic irrigation far exceeded acceptable levels for producing marketable container-grown `Formosa' azalea plants.

scholarly journals 095 Vase Life of Cut Roses Grown in Coal Bottom Ash-amended Media: A Correlation with Tissue Calcium

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 405B-405
Author(s):  
Marlene Cross ◽  
Bradford Bearce ◽  
Rajeev Arora
Keyword(s):  
Bottom Ash ◽  
Leaf Tissue ◽  
Vase Life ◽  
Dolomitic Lime ◽  
Coal Bottom Ash ◽  
Low Calcium ◽  
High Calcium ◽  
Tissue Calcium ◽  
Calcium And Magnesium ◽  
Kinetics Of

The vase life of roses grown in coal bottom ash (CBA)-amended media was evaluated. CBA is enriched in calcium, a nutrient implicated in delaying senescence. Two rose cultivars, Cara Mia and Dakota, were grown (from started eye plants) in four media: a 50% CBA medium and a peat:vermiculite medium amended with calcitic and dolomitic lime (1:1) were used as “high calcium” media, whereas a 25% CBA medium and a peat:vermiculite medium amended with dolomitic lime only were used as “low calcium” media. Vase life of the freshly harvested roses was evaluated. Elemental analysis of the leaves showed that roses grown in the “high calcium” media had greater calcium in the leaf tissue as well as longer vase lives (12.6 and 13.5 days) when compared to those grown in the “low calcium” media (12.1 and 10.9 days). However, petal tissue Ca was not affected by media and was not correlated with vase life. Petal tissue calcium was ≈15 times lower than leaf tissue calcium. Calcium and magnesium increased in the petal tissue over the vase life of the senescing petals. A comparison of `Cara Mia' roses (vase life of 14 days) and `Dakota' roses (vase life of 8.5 days) showed that the longer-lived `Cara Mia' had lower leaf and petal calcium levels. Both varieties followed a similar kinetics of electrolyte leakage (total E.C. and K) during their respective vase lives.

scholarly journals Ketamine Alters Calcium and Magnesium in Brain Tissue following Experimental Head Trauma in Rats

1993 ◽  
Vol 13 (6) ◽  
pp. 962-968 ◽  
Author(s):  
Yoram Shapira ◽  
Arthur M. Lam ◽  
Alan A. Artru ◽  
Calvin Eng ◽  
Louise Soltow
Keyword(s):  
Head Injury ◽  
Brain Tissue ◽  
Head Trauma ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Magnesium Content ◽  
Sprague Dawley ◽  
Inductively Coupled ◽  
Tissue Calcium ◽  
Calcium And Magnesium

We previously reported that the N-methyl-d-aspartate receptor antagonists dizocilpine maleate and ketamine improved the neurological severity score (NSS) after head trauma in rats. Other investigators have reported increased calcium and decreased magnesium following head trauma in untreated rats. The present study was designed to determine whether ketamine influences the concentrations of calcium and magnesium in brain tissue following head trauma. Eighty-six male Sprague–Dawley rats (180 ± 15 g) were divided into eight groups. Groups A (no head injury) and C (head injury) received no treatment. Groups B (no head injury) and D–H (head injury) received ketamine. In groups D, E, and F, ketamine, 180 mg/kg i.p., was given 1, 2, and 4 h after head trauma, respectively. In groups G and H, ketamine, 120 and 60 mg/kg, respectively, was given 1 h after head trauma. After we killed the rats at 48 h, cortical slices were taken to measure tissue calcium and magnesium content by the inductively coupled plasma atomic emission spectroscopy method. In the contused hemispheres, calcium increased and magnesium decreased (p < 0.0001). Among the head-injured groups, the increase in brain tissue calcium was smaller in groups receiving 60 mg/kg of ketamine at 1 h or 180 mg/kg of ketamine at 1, 2, or 4 h than in the group not receiving ketamine. The decrease in brain tissue magnesium was smaller in the groups receiving 180 mg/kg of ketamine at 1 and 2 h than in the group not receiving ketamine. Temporalis muscle and rectal temperatures at 1, 2, 4, 24, and 48 h after head trauma were not significantly different between treated and untreated groups. It is concluded that, in this model of closed cranial impact, 180 mg/kg of ketamine given 1 or 2 h after injury reduced both the increase in brain tissue calcium and the decrease in brain tissue magnesium at 48 h following head trauma.

The Effect of Calcium and Magnesium on Rabbit Blood Platelet Aggregation in Vitro

1964 ◽  
Vol 12 (01) ◽  
pp. 179-200 ◽  
Author(s):  
Torstein Hovig
Keyword(s):  
Platelet Aggregation ◽  
Cation Exchange ◽  
Calcium Concentration ◽  
Blood Platelets ◽  
Blood Platelet ◽  
Rabbit Blood ◽  
Calcium And Magnesium ◽  
Induced Aggregation ◽  
Blood Platelet Aggregation

SummaryThe effect of calcium and magnesium on the aggregation of rabbit blood platelets in vitro was studied, with the following results:1. Platelet aggregation induced by ADP or collagen could be prevented by EGTA or EDTA. The aggregating effect was restored by recalcification. The effect was also restored by addition of magnesium in EDTA-PRP, but not in EGTA-PRP unless a surplus of calcium was present.2. Calcium remained in concentrations of the order of 0.15–0.25 mM after dialysis or cation exchange of plasma. Aggregation of washed platelets resuspended in such plasma could not be produced with ADP or collagen, unless the calcium concentration was increased or that magnesium was added.3. The adhesiveness of blood platelets to collagen was reduced in EGTA-PRP and EDTA-PRP. Release of ADP from platelets influenced by collagen could not be demonstrated either in EGTA-PRP (presence of magnesium) or in EDTA-PRP.4. It is concluded that calcium is a necessary factor both for the reaction leading to release of ADP and for the the aggregation produced by ADP.5. Thrombin induced aggregation of washed platelets suspended in tris-buffered saline in the presence of calcium. No effect of magnesium could be observed unless small quantities of calcium were present.

Relationship of Calcium and Magnesium to the Occurrence of Bloat in Lamb

1962 ◽  
Vol 21 (4) ◽  
pp. 798-803 ◽  
Author(s):  
Keith J. Smith ◽  
Walter Woods
Keyword(s):  
Calcium And Magnesium ◽  
Relationship Of

Role of kidney in maintaining calcium and magnesium homeostasis and its disorders (Part I)

2018 ◽  
Vol 20 (2) ◽  
pp. 150-169
Author(s):  
Ja.F. Zverev ◽  
◽  
V.M. Bryukhanov ◽  
A.Ya. Rykunova ◽  
◽  
...  
Keyword(s):  
Magnesium Homeostasis ◽  
Calcium And Magnesium

Thermodynamic properties of montechellite

2019 ◽  
Vol 64 (12) ◽  
pp. 1274-1280
Author(s):  
L. P. Ogorodova ◽  
Yu. D. Gritsenko ◽  
M. F. Vigasina ◽  
A. Yu. Bychkov ◽  
D. A. Ksenofontov ◽  
...  
Keyword(s):  
High Temperature ◽  
Gibbs Energy ◽  
Solution Calorimetry ◽  
Thermochemical Study ◽  
Gibbs Energy Of Formation ◽  
Calvet Microcalorimeter ◽  
Magnesium Orthosilicate ◽  
Calcium And Magnesium ◽  
The Enthalpy Of Formation ◽  
Energy Of Formation

A thermochemical study of natural calcium and magnesium orthosilicate ─ monticellite (Ca1.00Mg0.95)[SiO4] (Khabarovsk Territory, Russia) was carried out on the Tian-Calvet microcalorimeter. The enthalpy of formation from the elements fHоel(298.15 K) = -2238.4 4.5 kJ / mol was determined by the method of high-temperature melt solution calorimetry. The enthalpy and Gibbs energy of formation of monticellite of the theoretical composition of CaMg[SiO4] are calculated: fH0el(298.15 K) = -2248.4 4.5 kJ/mol and fG0el(298.15 K) = -2130.5 4.5 kJ/mol.

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