Lanthanum ions decorated 2-dimensional g-C3N4 for ciprofloxacin photodegradation

Chemosphere ◽  
2020 ◽  
pp. 128780
Author(s):  
Saikat Kumar Kuila ◽  
Deepak Kumar Gorai ◽  
Bramha Gupta ◽  
Ashok Kumar Gupta ◽  
Chandra Sekhar Tiwary ◽  
...  
Keyword(s):  
Coatings ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 299 ◽  
Author(s):  
Ning Li ◽  
Weizeng Chen ◽  
Lirong Lu ◽  
Chenghui Gao

The polycrystalline Ni–Mo–La composite coating was obtained by electrodeposition through the addition of La3+ ions into Ni, Mo ions main salt weak alkaline solution. The obtained composite contain 0.92 at.% La. According to the law of ionic activity, the redox reaction of three kinds of metal atoms was studied by polarography and cyclic voltammetry. It was found that the addition of lanthanum ions changed the composite structural, phase, and element, and the OH− ions were deduced during the electrodeposition in alkaline solution. The introduction of lanthanum and molybdenum ions negatively shifted the reduction potential of nickel ions and broadened the peaks significantly in the deposition process, retarding the reduction and deposition rate of Ni ions, which was characterized by a multi-step reduction process of Mo and La metal atoms.


1998 ◽  
Vol 43 (6) ◽  
pp. 490-493
Author(s):  
Huamin Tu ◽  
Yijie Wu ◽  
Yansheng Yang ◽  
Menglian Gong ◽  
Hongjie Zhang

1990 ◽  
Vol 96 (1) ◽  
pp. 47-56 ◽  
Author(s):  
C Caputo ◽  
P Bolaños

After a contracture response, skeletal muscle fibers enter into a state of contractile refractoriness or inactivation. Contractile inactivation starts soon after membrane depolarization, and causes spontaneous relaxation from the contracture response. Here we demonstrate that contractile inactivation continues to develop for tens of seconds if the membrane remains in a depolarized state. We have studied this phenomenon using short (1.5 mm) frog muscle fibers dissected from the Lumbricalis brevis muscles of the frog, with a two-microelectrode voltage-clamp technique. After a contracture caused by membrane depolarization to 0 mV, from a holding potential of -100 mV, a second contracture can be developed only if the membrane is repolarized beyond a determined potential value for a certain period of time. We have used a repriming protocol of 1 or 2 s at -100 mV. After this repriming period a fiber, if depolarized again to 0 mV, may develop a second contracture, whose magnitude and time course will depend on the duration of the period during which the fiber was maintained at 0 mV before the repriming process. With this procedure it is possible to demonstrate that the inactivation process builds up with a very slow time course, with a half time of approximately 35 s and completion in greater than 100 s. After prolonged depolarizations (greater than 100 s), the repriming time course is slower and the inactivation curve (obtained by plotting the extent of repriming against the repriming membrane potential) is shifted toward more negative potentials by greater than 30 mV when compared with similar curves obtained after shorter depolarizing periods (10-30 s). These results indicate that important changes occur in the physical state of the molecular moiety that is responsible for the inactivation phenomenon. The shift of the inactivation curve can be partially reversed by a low concentration (50 microM) of lanthanum ions. In the presence of 0.5 mM caffeine, larger responses can be obtained even after prolonged depolarization periods, indicating that the fibers maintain their capacity to liberate calcium.


1980 ◽  
Vol 309 (1) ◽  
pp. 199-214 ◽  
Author(s):  
R Miledi ◽  
P C Molenaar ◽  
R L Polak
Keyword(s):  

2012 ◽  
Vol 367 (1) ◽  
pp. 193-198 ◽  
Author(s):  
Paula Toimil ◽  
Rocío Daviña ◽  
Juan Sabín ◽  
Gerardo Prieto ◽  
Félix Sarmiento

2006 ◽  
Vol 45 (48) ◽  
pp. 8134-8138 ◽  
Author(s):  
Kyung Seok Jeong ◽  
Young Shin Kim ◽  
Yun Ju Kim ◽  
Eunsung Lee ◽  
Ji Hye Yoon ◽  
...  
Keyword(s):  

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