Search results for "clam"
showing 10 items of 454 documents
Azonia spiro polyaza macrocycles containing biphenyl subunits as anion and cation receptors
2011
Abstract The reaction of N-Boc triprotected cyclam with bis(chloromethyl)biphenyl followed by the corresponding deprotection of the nitrogen atoms allows the preparation of receptor 3 containing an azonia spiro subunit. This receptor shows slightly increased basicity than cyclam, in particular for the formation of the appropriate triply charged species as a consequence of the reduced capacity of the structure present in 3 to stabilize the species with lower protonation degrees through the formation of intramolecular hydrogen bonds. The properties of 3 as a receptor for Cu2+ and Zn2+ and the anions derived from PO 4 3 − ( Pi ) , P 2 O 7 4 − ( PPi ) , P 3 O 10 5 − ( TPP ) and ATP have been st…
An Off-On-Off Fluorescent Sensor for pH Windows Based on the 13aneN4-Zn 2+ System
2016
International audience; The new ligand L was prepared and features a 13-membered tetraaza macrocyclic ring with a 1,8-naphthalimide fluorophore appended to a C atom of its backbone. The protonation constants of L as well as its complexation constants with Zn2+ ions were determined in 1:1 water/methanol solutions by potentiometric titrations. Fluorimetric pH titrations were performed with L alone and L in the presence of Zn2+ ions (1:1), and the species distributions (%) versus pH were compared. A window-shaped fluorescence trend was observed with pH for the L/Zn2+ system, which behaves as an off-on-off pH sensor. The on window is centred in the 6.5-7.5 pH range, in correspondence with the f…
MONENSIN ENHANCES DIGOXIN-INDUCED ARRHYTHMIAS IN GUINEA-PIGS
1993
Effects of pretreatment with monensin (150 ug/kg), atenolol (0.3 mg/kg), atenolol plus monensin, verapamil (0.38 mg/kg), verapamil plus monensin, glibenclamide(0.38 mg/kg) and glibenclamide plus monensin on the dose of digoxin required to induce premature ventricular contractions (PVCS) in anaesthetized guinea-pigs were studied. Monensin reduced while atenolol increased the dose of digoxin required to produce PVCS. Atenolol plus monensin increased the dose of digoxin required to produce PVCS in presence of monensin alone. Verapamil reduces the arrhythmogenic effect of monensin on digoxin. Glibenclamide antagonises the effect of monensin on digoxin induced PVCS. From the present data it coul…
Monovalent cation conductance in Xenopus laevis oocytes expressing hCAT-3
2005
hCAT-3 (human cationic amino acid transporter type three) was investigated with both the two-electrode voltage clamp method and tracer experiments. Oocytes expressing hCAT-3 displayed less negative membrane potentials and larger voltage-dependent currents than native or water-injected oocytes did. Ion substitution experiments in hCAT-3-expressing oocytes revealed a large conductance for Na + and K + . In the presence of l-Arg, voltage-dependent inward and outward currents were observed. At symmetrical (inside/outside) concentrations of l-Arg, the conductance of the transporter increased monoexponentially with the l-Arg concentrations; the calculated Vmax and KM values amounted to 8.3 AS and…
Impact of arborescent vegetation applied to biological reclamation of waste heaps on process of anthropogenic soil formation
2006
Holistic Survey of a Degraded Soilscape from Eastern Romania: Hypotesis of Reclamation and Social-Economical Development
2015
Mission versus ethics in 1 Corinthians 9? ‘Implicit ethics’ as an aid in analysing New Testament texts
2012
The central question concerning how mission and ethics are related arises within the context of the understanding of ethics itself and in this way often leads back to the familiar ‘indicative and imperative’ model. This oversimplified approach, however, is ultimately inadequate for the Pauline ethic in general and for the particular problem concerning mission and ethics. In this article, 1 Corinthians 9 was drawn upon as an example for the ‘implicit ethics’ model, a model which allows for a more nuanced presentation of the grounds and justification for behaviour and action. Through this approach it became clear that the proclamation of the Gospel does not have to be ‘unethical’; rather, it …
Use of Antihypertensive Drugs During Preeclampsia
2018
Treatment of pregnancy-related hypertensive disorders, such as preeclampsia (PE), remain a challenging problem in obstetrics. Typically, aggressive antihypertensive drug treatment options are avoided to prevent pharmacological-induced hypotension. Another major concern of administering antihypertensive drugs during pregnancy is possible adverse fetal outcome. In addition, management of hypertension during pregnancy in chronic hypertensive patients or in patients with prior kidney problems are carefully considered. Recent studies suggest that PE patients are at increased cardiovascular risk postpartum. Therefore, these patients need to be monitored postpartum for the subsequent development o…
Fruit Trees and Bushes as a Biodiversity Element in the “Górażdże” Quarry Reclaimed Areas
2019
The assumption of biological land reclamation in the forest direction is to introduce trees and shrubs on the reclaimed area so as to bring it as close as possible to the natural state based on the species characteristic for forest communities. While assessing the concept of biodiversity resulting from the naturalistic approach to the forest as a timeless good, it is necessary to take into account the diversity of plantings used and their multifunctionality. One of the functions is to designate crops for utility purposes, by creating a natural undergrowth, birdhouses, forest fringe plantings and enclaves of edible fruit plants. As part of the research, implementing the biodiversity of midfo…