scholarly journals HYDROGEN ION CONCENTRATIONS IN THE BLOOD OF INSECTS

1925 ◽  
Vol 7 (5) ◽  
pp. 599-602 ◽  
Author(s):  
R. W. Glaser
Keyword(s):  
Bombyx Mori ◽  
Hydrogen Ion ◽  
Malacosoma Americanum ◽  
Ion Concentrations ◽  
Ph Values ◽  
Blood Ph ◽  
Range Of Values

The range of pH values for the blood of grasshoppers and of houseflies is 7.2 to 7.6. The range of values for roaches is 7.5 to 8.0. The range for Malacosoma americanum is 6.4 to 7.4; and the range for Bombyx mori is 6.4 to 7.2. From the work of other investigators and from the writer's results, it is apparent that the pH of insect blood, in general, may vary between 6.4 and 8.0. In the forms observed no correlation exists between blood pH and age, nor between pH and metamorphosis.

scholarly journals Effects of External Acidification on the Blood Acid-Base Status and Ion Concentrations of Lamprey

1988 ◽  
Vol 136 (1) ◽  
pp. 351-361
Author(s):  
LEONA MATTSOFF ◽  
MIKKO NIKINMAA
Keyword(s):  
High Sensitivity ◽  
Co2 Concentration ◽  
Acid Base ◽  
Ion Concentrations ◽  
Ph Response ◽  
Ph Values ◽  
Blood Ph ◽  
Acid Base Status ◽  
The Difference ◽  
K Concentration

We studied the effects of acute external acidification on the acid-base status and plasma and red cell ion concentrations of lampreys. Mortality was observed within 24 h at pH5 and especially at pH4. The main reason for the high sensitivity of lampreys to acid water appears to be the large drop in blood pH: 0.6 and 0.8 units after 24 h at pH5 and pH4, respectively. The drop of plasma pH is much larger than in teleost fishes exposed to similar pH values. The difference in the plasma pH response between lampreys and teleosts probably results from the low buffering capacity of lamprey blood, since red cells cannot participate in buffering extracellular acid loads. Acidification also caused a decrease in both Na+ and C− concentrations and an elevation in K+ concentration of plasma. The drop in plasma Na+ concentration occurred faster than the drop in plasma Cl− concentration which, in turn, coincided with the decrease in total CO2 concentration of the blood.

scholarly journals pH measurements in the slaughterline and carcass quality: a survey in six Belgian slaughterhouses

1994 ◽  
Vol 42 (3) ◽  
pp. 235-248
Author(s):  
S. De Smet
Keyword(s):  
Meat Quality ◽  
Hydrogen Ion ◽  
Quality Data ◽  
Carcass Quality ◽  
Mean Values ◽  
Unequal Variances ◽  
Ion Concentrations ◽  
Ph Values ◽  
Initial Ph ◽  
Slaughter Pigs

pH was measured early post mortem in longissimus muscle (and occasionally in semimembranosus muscle) in the slaughterline of six Belgian slaughtering plants in three or four sessions. Mean pH values differed according to the mode of expression: pH means calculated after transformation to hydrogen ion concentrations were always lower than means calculated directly from pH values. The differences was linearly dependent on the variance, meaning that transformation of pH values to hydrogen ion concentrations is strongly recommended when comparing mean values of groups with unequal variances. Large differences in pH means were found between slaughterhouses that could not be attributed to differences in time of measuring postmortem and that were probably not related to differences in the slaughtering procedure. On the other hand, negative relationships were apparent between carcass quality data (lean content and instrumental or visual conformation score) and pH values between as well as within all slaughtering plants. Although no exact information was available on the preslaughter treatment of the animals, it is suggested that the genetic antagonism between carcass quality and meat quality is the main source of the fairly high proportion of low initial pH values and inferior meat quality in Belgian slaughter pigs.

scholarly journals The acidity of muscle during maintained contraction

1922 ◽  
Vol 93 (654) ◽  
pp. 406-410
Keyword(s):  
Manganese Dioxide ◽  
Hydrogen Ion ◽  
Ion Concentrations

In 1913, I described a method for recording changes in hydrogen-ion concentrations in tissues, by means of a manganese dioxide electrode in combination with a calomel electrode (1). By this method it was shown that the acidity of muscle probably increased at the same time as, or slightly before, the tension increased, and that the acidity decreased as the muscle relaxed (2). In a paper, which appeared as this note was being prepared for publication, Ritchie states that he has been unable to detect a variation in acidity by the use of manganese dioxide electrodes. I am inclined to think that his failure is due to the injury to the muscles on insertion of wires into its substance. In my own experiments the wires rest on the surface of the muscle.

STUDY OF SOME FACTORS THAT AFFECT THE DISTRIBUTION OF NUCLEAR VOLUMES IN PREPARATIONS OF RAT LIVER NUCLEI

1967 ◽  
Vol 45 (7) ◽  
pp. 1175-1183 ◽  
Author(s):  
Roberto Umaña
Keyword(s):  
Rat Liver ◽  
Dna Content ◽  
Direct Relationship ◽  
Magnesium Ion ◽  
Homogenization Procedure ◽  
Ion Concentrations ◽  
Ph Values ◽  
Sucrose Solutions ◽  
Liver Nuclei ◽  
Calcium And Magnesium

The effect of the homogenization procedure, the centrifugation scheme, and the composition of the suspension medium on the distribution of nuclear volumes has been studied.It has been shown that the Waring Blendor not only destroys a greater number of the nuclei during homogenization, but also that this destruction is a selective one. At neutral pH values, no direct relationship appears to exist between the DNA content of the nuclei and their density. For this reason, purification in concentrated sucrose solutions produces a selective loss of the lighter nuclei, which includes small diploid stromal nuclei and some of the larger polyploid type of parenchymal nuclei.The study of the effect of increasing the calcium and magnesium ion concentrations (from 0.001 to 0.005 M) on the nuclear distribution showed that these ions produce a selective shrinkage and condensation of the nuclei, probably through different mechanisms.

scholarly journals A Novel Alternative Methods for Decalcification of Water Resources Using Green Agro-Ashes

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6777
Author(s):  
Safaa El-Nahas ◽  
Abdulrahem S. Arafat ◽  
Hanan Salah El Din ◽  
Abdulrahman G. Alhamzani ◽  
Mortaga M. Abou-Krisha ◽  
...  
Keyword(s):  
Treatment Process ◽  
Swot Analysis ◽  
Hard Water ◽  
Cost Effective ◽  
Alternative Methods ◽  
Considerable Proportion ◽  
Ion Concentrations ◽  
Ph Values ◽  
Ecologically Sustainable ◽  
Water Contents

The strategic idea in this work was to increase pH values by employing natural alkali sources (i.e., HCO3− and CO32−) from four tested agro-ashes as an alternative to chemicals (i.e., lime or soda ash). The considerable proportion of carbonates and bicarbonates in the investigated ash products had remarkable features, making them viable resources. All ash materials showed a significant ability for Ca ion elimination at high initial Ca ion concentrations. A slight quantity of ash (10 g/L) was sufficient for usage on very hard water contents up to 3000 ppm. Finally, the tested agro-ash was free of cost. Furthermore, unlike other conventional precipitants, such as NaOH, Ca(OH)2, NaHCO3, Na2CO3, and CaO, they are cost effective and ecologically sustainable. There is no need to employ any additional chemicals or modify the agro-ash materials throughout the treatment process. The benefits of the manufactured ash were assessed using a SWOT analysis.

The Role of CaCO3 Dissolution As a Source of HCO3- For the Buffering of Hypercapnic Acidosis in Aquatic and Terrestrial Decapod Crustaceans

1981 ◽  
Vol 94 (1) ◽  
pp. 269-274 ◽  
Author(s):  
R. P. HENRY ◽  
G. A. KORMANIK ◽  
N. J. SMATRESK ◽  
J. N. CAMERON
Keyword(s):  
Hypercapnic Acidosis ◽  
Decapod Crustaceans ◽  
Blood Calcium ◽  
Partial Restoration ◽  
Ph Values ◽  
Blood Ph ◽  
Gecarcinus Lateralis

Blood calcium concentrations are elevated during a hypercapnic acidosis in the terrestrial crab Gecarcinus lateralis, but not in the aquatic Callincetes sapidus. The increase occurs concomitantly with a rise in blood HCO3- and partial restoration of resting blood pH values. It is believed that in G. lateralis that a source of CaCO3, possibly the shell, is being dissolved for buffering purposes.

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