Chapter 3. Slow Decay or Intentional Neglect?

Thin Sympathy ◽  
2021 ◽  
pp. 22-39
Keyword(s):  
Slow Decay

Nitrate and chloride formation in chloramination

1994 ◽  
Vol 30 (9) ◽  
pp. 101-110
Author(s):  
V. Diyamandoglu
Keyword(s):  
Kinetic Model ◽  
Analytical Method ◽  
Kinetic Data ◽  
Experimental Results ◽  
Mass Balances ◽  
Time Profiles ◽  
Slow Decay ◽  
Concentration Time ◽  
End Products ◽  
Chlorine Residuals

The formation of nitrate and chloride as end-products of chloramination (combined chlorination) was investigated at pH ranging between 6.9 and 9.6 at 25°C. The experimental results comprised concentration-time profiles of combined chlorine residuals along with nitrate and chloride. Nitrite, if present, was always below the detectibility limit of the analytical method used (25 ppb). Mass balances on chlorine species depicted that chloride formed during the slow decay of combined chlorine residuals does not account for all the chlorine lost. This substantiates the formation of other reaction end-products which are yet to be identified. A kinetic model for chloramination is proposed based on the kinetic data obtained in this study.

scholarly journals Effect of Temperature on Space Charge Distribution of Oil–Paper Insulation under DC and Polarity Reversal Voltage

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2271 ◽  
Author(s):  
Qingguo Chen ◽  
Jinfeng Zhang ◽  
Minghe Chi ◽  
Peng Tan ◽  
Wenxin Sun
Keyword(s):  
Electric Field ◽  
Space Charge ◽  
Electric Field Distribution ◽  
Operating Conditions ◽  
Polarity Reversal ◽  
Effect Of Temperature ◽  
Slow Decay ◽  
Voltage Polarity ◽  
Field Distortion ◽  
Paper Insulation

The electric field distortion caused by space charge is an important factor affecting the operation reliability of oil–paper insulation in a converter transformer. To study the accumulation and decay characteristics of the space charge within oil-impregnated pressboard under DC and polarity reversal voltage, and consider the possible operating conditions of the converter transformer, the space charge behavior of oil-impregnated pressboard was measured by the pulsed electro-acoustic (PEA) method in the temperature range from −20 °C to 60 °C. The effect of temperature on the accumulation and decay characteristics of space charge is also analyzed. The space charge accumulated within the pressboard at low temperature is mainly homocharge injected by the electrode, while heterocharge formed by ion dissociation counteracts some of the homocharge at high temperature. Thus, the space charge of pressboard first increases, then decreases, with an increase in temperature. However, slow decay of the space charge causes severe distortion of the electric field distribution in the pressboard during voltage polarity reversal.

Large Photoresponse in Amorphous In–Ga–Zn–O and Origin of Reversible and Slow Decay

2010 ◽  
Vol 13 (9) ◽  
pp. H324 ◽  
Author(s):  
Dong Hee Lee ◽  
Ken-ichi Kawamura ◽  
Kenji Nomura ◽  
Toshio Kamiya ◽  
Hideo Hosono
Keyword(s):  
Slow Decay

Excretion of Iohexol and Metrizoate in Human Breast Milk

1987 ◽  
Vol 28 (5) ◽  
pp. 523-526 ◽  
Author(s):  
S. T. Nielsen ◽  
I. Matheson ◽  
J. N. Rasmussen ◽  
K. Skinnemoen ◽  
E. Andrew ◽  
...  
Keyword(s):  
Breast Milk ◽  
Low Dose ◽  
Decay Curve ◽  
Human Breast Milk ◽  
Human Breast ◽  
Blood Samples ◽  
Lactating Women ◽  
Milk Samples ◽  
Slow Decay ◽  
Contrast Medium Injection

Six lactating women undergoing contrast media examination had milk and blood taken to determine the rate and extent of excretion of iohexol (Omnipaque) (four mothers) and metrizoate (Isopaque) (two mothers). Blood samples were taken up to 45 minutes and milk samples up to 48 hours after the contrast medium injection. The excretion was low, reaching a maximum at 3 to 6 hours and showing a slow decay curve (t 1/2 = 15 to 108 hours). One mother, who was weaning her baby, showed a different excretion pattern. The amount excreted during 24 hours was about 0.5 per cent of the weight adjusted maternal dose for both iohexol and metrizoate. It is not likely, that such a low dose of poorly absorbed drug would cause any adverse effects in the infant, unless it is hypersensitive to the drug already. The authors consider breast feeding to be acceptable for mothers receiving iohexol or metrizoate.

Direct photoionization measurements of slow decay rates of vibrationally overexcited (CF3)3CI molecules in the ground electronic state in a beam

1986 ◽  
Vol 127 (5) ◽  
pp. 438-444 ◽  
Author(s):  
V.M. Apatin ◽  
V.S. Letokhov ◽  
V.N. Lokhman ◽  
G.N. Makarov ◽  
V.N. Bagratashvili ◽  
...  
Keyword(s):  
Electronic State ◽  
Decay Rates ◽  
Ground Electronic State ◽  
Slow Decay

scholarly journals Furious Frederich: Nietzsche’s neurosyphilis diagnosis and new hypotheses

2015 ◽  
Vol 73 (12) ◽  
pp. 1041-1043
Author(s):  
Charles André ◽  
André Rangel Rios
Keyword(s):  
Physical Examination ◽  
Frontotemporal Dementia ◽  
Basal Forebrain ◽  
The Other ◽  
Slow Decay ◽  
Other Hand ◽  
Alternative Hypotheses ◽  
End Stage

The causes of Friedrich Nietzsche’s mental breakdown in early 1889 and of the subsequent slow decay to end-stage dementia along ten years will possibly remain open to debate. The diagnosis of syphilitic dementia paralytica, based only on medical anamnesis and physical examination, was considered indisputable by Otto Binswanger. On the other hand, taking into account recently described diseases, selectively collected evidence lend some support to alternative hypotheses: basal forebrain meningioma, CADASIL, MELAS and frontotemporal dementia.

scholarly journals MEASUREMENT OF NONLINEAR REFRACTIVE INDEX WITH Z-SCAN METHOD FOR SLOW DECAY MATERIALS

1995 ◽  
Vol 44 (11) ◽  
pp. 1754
Author(s):  
YANG QI-GUANG ◽  
FEI HAO-SHENG ◽  
WEI ZHEN-QIAN
Keyword(s):  
Refractive Index ◽  
Nonlinear Refractive Index ◽  
Slow Decay

Optical Detection of Laser-Induced Ionization: A Study of the Time Decay of Strontium Ions in the Air-Acetylene Flame

1986 ◽  
Vol 40 (8) ◽  
pp. 1085-1092 ◽  
Author(s):  
G. C. Turk ◽  
N. Omenetto
Keyword(s):  
State Transition ◽  
Electron Number Density ◽  
Dye Laser ◽  
Number Density ◽  
Fast Decay ◽  
Ion Chemistry ◽  
Electron Number ◽  
Slow Decay ◽  
Optical Probing ◽  
Density Of Electrons

Strontium atoms in the air-acetylene flame are directly photoionized in two steps provided by one dye laser tuned at the resonance ground-state transition (460.733 nm) and by the excimer pump beam at 308 nm, partially split from the amplifier section of the dye laser. The ions produced are then monitored by a third laser beam, colinear and counterpropagating in the flame, tuned to an ionic fluorescence transition and delayed in time with respect to the ionizing beams. In this way a fast decay, which is not affected by variations in the electron number density in the flame and therefore attributed to ion chemistry, and a slow decay, due to recombination, could clearly be observed. The fast decay is affected by variations in the flame stoichiometry and the slow decay by the number density of electrons in the flame, as shown by the addition of varying concentrations of an easily ionized element like caesium. The advantages of this optical probing of the laser-induced ionization in flames are discussed.

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