scholarly journals Preliminary research on mortality of wood destroying Anobiidae (Coleoptera) following the application of p-dichlorobenzene in combination with low oxygen atmosphere fumigation

2018 ◽  
Vol 87 (2) ◽  
pp. 141-151
Author(s):  
Aleksandra Wójcik ◽  
Adam Krajewski
Keyword(s):  
Oxygen Atmosphere ◽  
Proper Choice ◽  
Museum Collections ◽  
Low Oxygen ◽  
Complete Eradication ◽  
Long Period ◽  
Historical Objects ◽  
Preliminary Research ◽  
Wood Boring ◽  
Anobium Punctatum

Abstract Experiments were undertaken in connection with the need, indicated in the literature, for the proper choice of a substance enhancing the effect of a low oxygen atmosphere used as a means of controlling wood boring insects in museum collections and historical objects. A low oxygen atmosphere itself causes the death of wood boring insects after a relatively long period of application. Thus, attempts were made to use p-dichlorobenzene to accelerate the effects of a low oxygen atmosphere in the control of wood boring insects. The experiments were performed as a continuation of preliminary research on the effect of p-dichlorobenzene on Anobiidae in an aerobic atmosphere. The paper present the results of gassing Anobium punctatum and Ptilinus pectinicornis (Coleoptera: Anobiidae) larvae with 1,4-dichlorobenzene in a low oxygen atmosphere of nitrogen and argon. The experiments were performed in laboratory conditions at a temperature of 20°C on larvae extracted from wood. The results do not show a faster elimination of larvae of either species using p-dichlorobenzene in a low oxygen atmosphere as compared to using p-dichlorobenzene in an aerobic atmosphere. Complete eradication of larvae in the test groups was obtained after 48 hours when using p-dichlorobenzene in nitrogen. The results obtained when using p-dichlorobenzene in argon appear to be worse at fumigation times shorter than 48 hours.

THE UNIQUE FETAL RED CELL AND ITS FUNCTION

PEDIATRICS ◽  
1973 ◽  
Vol 51 (3) ◽  
pp. 494-500 ◽  
Author(s):  
Frank A. Oski
Keyword(s):  
Red Blood Cells ◽  
Newborn Infant ◽  
Blood Cells ◽  
Human Fetus ◽  
Exchange Transfusion ◽  
Oxygen Atmosphere ◽  
Hypoxic Stress ◽  
Red Cell ◽  
Low Oxygen ◽  
Rapid Replacement

The red blood cells of the human fetus differ in many major respects from the red cells of the normal adult. These differences appear admirably suited for the acquisition, transport, and release of oxygen in the low oxygen atmosphere of intrauterine existence. These same differences appear to confer a handicap to the cell in the extrauterine environment, particularly under conditions of hypoxic stress. The rapid replacement of these cells by artificial means, such as early exchange transfusion, may offer an advantage to the newborn infant in certain clinical situations.

scholarly journals Effects of Low-oxygen Atmosphere on Ethanolic Fermentation in Fresh-cut Carrots

1997 ◽  
Vol 122 (1) ◽  
pp. 107-111 ◽  
Author(s):  
Hisashi Kato-Noguchi ◽  
Alley E. Watada
Keyword(s):  
Alcohol Dehydrogenase ◽  
Daucus Carota ◽  
Continuous Flow ◽  
Pyruvate Decarboxylase ◽  
Oxygen Atmosphere ◽  
Low Oxygen ◽  
Ethanolic Fermentation ◽  
Fresh Cut ◽  
Fermentation Metabolism

Carrot (Daucus carota L.) root shreds were stored under a continuous flow of 0.5% and 2% O2 (balance N2) or in air for 7 days at 5 and 15 °C to study the regulation of ethanolic fermentation metabolism. Low-O2 atmospheres of 0.5% and 2% caused increases in ethanol and acetaldehyde concentrations and the activities of alcohol dehydrogenase (ADH) and pyruvate decarboxylase (PDC) compared to air. By day 3, ethanol increased 38-, 25-, 13-, and 9.5-fold; acetaldehyde increased 20-, 13-, 7.7-, and 5.6-fold; ADH increased 7.6-, 6.3-, 3.8-, and 2.7-fold; and PDC increased 4.2-, 3.9-, 2.3-, and 2.2-fold in samples at 0.5% O2 at 15 or 5 °C and at 2% O2 at 15 or 5 °C, respectively, compared with corresponding samples in air. These results indicate that ethanolic fermentation was accelerated more in the 0.5% than in the 2% O2 atmosphere and more at 15 °C than at 5 °C. The acceleration of ethanolic fermentation may allow production of some ATP, which may permit the carrot tissues to survive.

scholarly journals Large Mass-Independent Oxygen Isotope Fractionations in Mid-Proterozoic Sediments: Evidence for a Low-Oxygen Atmosphere?

Astrobiology ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 628-636 ◽  
Author(s):  
Noah J. Planavsky ◽  
Christopher T. Reinhard ◽  
Terry T. Isson ◽  
Kazumi Ozaki ◽  
Peter W. Crockford
Keyword(s):  
Oxygen Isotope ◽  
Large Mass ◽  
Oxygen Atmosphere ◽  
Low Oxygen

scholarly journals Regulation of Glycolytic Metabolism in Fresh-cut Carrots under Low Oxygen Atmosphere

1996 ◽  
Vol 121 (1) ◽  
pp. 123-126 ◽  
Author(s):  
Hisashi Kato-Noguchi ◽  
Alley E. Watada
Keyword(s):  
Daucus Carota ◽  
Continuous Flow ◽  
Oxygen Atmosphere ◽  
Similar Relationship ◽  
Glycolytic Metabolism ◽  
Low Oxygen ◽  
Regulation Of Glycolysis ◽  
Glycolytic Intermediates ◽  
Fresh Cut ◽  
Fructose 1,6 Bisphosphate

Carrot (Daucus carota L.) shreds were stored under a continuous flow of air or 0.5% and 2% O2 (balance N,) for 9 days at 5 and 15C. The resulting changes in respiration, levels of glycolytic intermediates, and activities of ATP: phosphofructo kinase (ATP-PFK), and PPi: phosphofructokinase (PPi-PFK) were monitored. Carrots under low O atmosphere exhibited an increase in RQ due to a greater reduction in 02 consumption than in CO2 production, and the increase in RQ was greater at 0.5% than at 2% O2 at both temperatures. Fructose 1,6-bisphosphate (F1,6P) accumulated with decreased O2 atmosphere and was 2-fold greater at 0.5% than at 2% O2 atmosphere at both temperatures. The levels of other glycolytic intermediates were not significantly influenced by low O2. The increase in PPi-PFK activity occurred at the same time as F1,6P accumulation. A similar relationship was not found with ATP-PFK. These results suggest that PPi-PFK may be involved in regulation of glycolysis under low O2 atmosphere.

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