scholarly journals On the stimulation of the de-excitation of nuclear isomers in plasma of a high-current electric discharge

2021 ◽  
Vol 8 (1) ◽  
pp. 5-13
Author(s):  
VLADIMIR KOLTCOV
Keyword(s):  
Energy Source ◽  
Electron Temperature ◽  
Electric Discharge ◽  
Laser Plasma ◽  
Half Life ◽  
Transition Energy ◽  
High Current ◽  
Nuclear Excitation ◽  
Nuclear Isomers ◽  
Stimulation Of

The prospects of stimulated de-excitation of nuclear isomers (SDENI) with a trigger transition energy ∆E up to ∼ 1 keV in a plasma of a high-current electric discharge (HCED) with an electron temperature θ ∼ ∆E are discussed. An estimate of the probability of the SDENI process in plasma by the mechanism of nuclear excitation by electron capture (NEEC) is obtained. Themost promising for the SDENI study are isomers 229mTh (∆E ≈ 8 eV), 235mU (∆E = 76 eV), 110mAg (∆E = 1128 eV). To create an energy source most promising isomer is 186m Re (∆E is unknown) with a half-life of 2 × 105y, for which stimulated de-excitation in the laser plasma had beenalready observed at θ ∼ 1 keV.

scholarly journals β-Adrenergic stimulation alters oligosaccharide pyrophosphoryl dolichol metabolism in rat parotid acinar cells

1985 ◽  
Vol 231 (2) ◽  
pp. 431-438 ◽  
Author(s):  
S R Grant ◽  
E E Kousvelari ◽  
D K Banerjee ◽  
B J Baum
Keyword(s):  
Half Life ◽  
Specific Radioactivity ◽  
Acinar Cells ◽  
Protein Glycosylation ◽  
Significant Enhancement ◽  
Adrenergic Stimulation ◽  
Parotid Acinar Cells ◽  
Secretory Glycoproteins ◽  
Rat Parotid ◽  
Stimulation Of

beta-Adrenergic stimulation of rat parotid acinar cells markedly increases [3H]mannose incorporation into N-linked glycoproteins [Kousvelari, Grant, Banerjee, Newby & Baum (1984) Biochem. J. 222, 17-24]. More than 90% of this protein-bound [3H]mannose was preferentially incorporated into four secretory glycoproteins. The ratio of [3H]mannose/[14C]leucine present in these individual proteins was 1.7-4-fold greater with isoproterenol-treated cells than with untreated controls. In isoproterenol-stimulated cells, [3H]mannose incorporation into mannosylphosphoryl dolichol and oligosaccharide-PP-dolichol was increased 2-3-fold over that observed in unstimulated cells. Similarly, formation of mannosylated oligosaccharide-PP-dolichol was increased approx. 4-fold in microsomes prepared from isoproterenol-treated cells. Also, turnover of oligosaccharide-PP-dolichol was significantly increased (5-fold) by β-adrenergic stimulation; the half-life for oligosaccharide-PP-dolichol decreased from 6 min in control cells to 1.2 min in isoproterenol-stimulated cells. By 15 min after isoproterenol addition to acinar cells, the specific radioactivity of parotid oligosaccharide moieties increased about 3-fold over the value observed in the absence of the agonist. Taken together, these results strongly suggest that elevation of N-linked protein glycosylation in rat parotid acinar cells after β-adrenoreceptor stimulation resulted from significant enhancement in the synthesis of mannosylphosphoryl dolichol and oligosaccharide-PP-dolichol and the turnover of oligosaccharide-PP-dolichol.

Neutral Electrode Contact Quality Monitoring: Quantifying Latent Risks, Improving Testability

2018 ◽  
Author(s):  
Daniel Friedrichs ◽  
Paul Kuehl ◽  
Lori Lucke
Keyword(s):  
High Frequency ◽  
High Current Density ◽  
Electrical Circuit ◽  
Quality Monitoring ◽  
High Current ◽  
Surgical Instrument ◽  
Surgical Tool ◽  
Monopolar Electrosurgery ◽  
Electrode Contact ◽  
Stimulation Of

In high-frequency (“HF”) monopolar electrosurgery (or radio-frequency ablation), high current density causes heating of tissue adjacent to a surgical instrument. HF current passes through tissue at a frequency sufficiently high to avoid stimulation of muscle, but intentionally causes I2R heating of tissue for the purposes of ablation, dissection, and coagulation. In addition to the surgical tool, a Neutral Electrode (“NE”, often called a “ground pad”, “return electrode”, or simply “pad”) contacts the patient to complete the electrical circuit, as shown in Fig. 1.

Metabolic requirements for anaerobic active Cl and Na transport in the bullfrog cornea

1979 ◽  
Vol 236 (5) ◽  
pp. C268-C276 ◽  
Author(s):  
P. S. Reinach ◽  
H. F. Schoen ◽  
O. A. Candia
Keyword(s):  
Energy Source ◽  
Amphotericin B ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Anaerobic Glycolysis ◽  
Anaerobic Conditions ◽  
Na Transport ◽  
Sufficient Energy ◽  
Aerobic And Anaerobic ◽  
Stimulation Of

In the bullfrog cornea, the relationships between the rates of aerobic and anaerobic glycolysis and active Cl and Na transport were studied. In NaCl Ringer (glucose-free), the short-circuit current (SCC) declined much more slowly under aerobic than under anaerobic conditions. The aerobic lactate effluxes in glucose-free and glucose-rich NaCl Ringer were 0.08 and 0.23 micromol/h.cm2, respectively. The transition to anoxia caused these values to increase significantly and was accompanied by depletion of endogenous glycogen in glucose-free Ringer. In Na2SO4 Ringer, amphotericin B (10(-5) M) stimulation of the aerobic SCC was not dependent on the presence of glucose but under anoxia, SCC stimulation required glucose. In Na2SO4 (glucose-rich) Ringer, amphotericin B stimulated the aerobic lactate efflux from 0.26 to 0.36 mumol/h.cm2 and anoxia increased it to 0.55 micromol/h.cm2. In NaCl Ringer, the addition of either 0.5 mM adenosine or 1 mM ATP with 26 mM glucose restored the anaerobic-inhibited SCC and lactate efflux of glucose-depleted corneas. The results show that the reactions of glycolysis are a sufficient energy source for supporting active Na and Cl transport.

DISSOCIATION BETWEEN LH-INDUCED AEROBIC GLYCOLYSIS AND OOCYTE MATURATION IN CULTURED GRAAFIAN FOLLICLES OF THE RAT

1976 ◽  
Vol 81 (2) ◽  
pp. 362-366 ◽  
Author(s):  
A. Tsafriri ◽  
M. E. Lieberman ◽  
K. Ahrén ◽  
H. R. Lindner
Keyword(s):  
Energy Source ◽  
Luteinizing Hormone ◽  
Oocyte Maturation ◽  
Aerobic Glycolysis ◽  
Follicle Cells ◽  
Meiotic Arrest ◽  
Lactate Accumulation ◽  
Glycolytic Activity ◽  
Stimulation Of

ABSTRACT Luteinizing hormone (NIH-LH-S18; 5 μg/ml) stimulated aerobic glycolysis in cultured Graafian follicles explanted from pro-oestrous rats before the preovulatory gonadotrophin surge: lactate accumulation in the medium was 70 % above control levels during 6 h incubations. Iodoacetate (2.5× 10-5 m) prevented this effect, without impairing the ability of LH to induce resumption of oocytic meiosis. Enrichment of the medium with pyruvate (3.3 × 10-4 m) or lactate (2.5 × 10-2 m) did not in itself cause ovum maturation. The results do not support the hypothesis that termination of meiotic arrest by LH is due to stimulation of glycolytic activity in the follicle cells, resulting in increased availability of an energy source readily utilizable by the oocyte.

Excitation of nuclear isomers by X rays from laser plasma

2010 ◽  
Vol 40 (4) ◽  
pp. 349-354 ◽  
Author(s):  
Aleksandr A Andreev ◽  
Konstantin Yu Platonov ◽  
Yu V Rozhdestvenskii ◽  
F Karpeshin ◽  
M B Trzhaskovskaya
Keyword(s):  
Laser Plasma ◽  
X Rays ◽  
Nuclear Isomers
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