Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Ullrich Stahl"'
Autor:
Jhonny Correa-Abril, Ullrich Stahl, Elvia V. Cabrera, Yonathan J. Parra, Michael A. Vega, Sonia Taamalli, Florent Louis, Joan Manuel Rodríguez-Díaz
Publikováno v:
iScience, Vol 27, Iss 6, Pp 109958- (2024)
Summary: Biochar obtained via microwave-assisted pyrolysis (MAP) at 720 W and 15 min from cocoa pod husk (CPH) is an efficient adsorbent of Cd2+(aq). Biochar of residual biomass of CPH (BCCPH) possesses favorable physicochemical and morphological pro
Externí odkaz:
https://doaj.org/article/838872b578bc4c0fbdeaaeb3c393714b
Autor:
Edward Jiménez, Santiago Lalangui, Edison Guacho, Ana Emperatriz Paucar, Paulina Herrera, David Vaca, Humberto González, Patricia Ochoa, Ullrich Stahl, Gustavo López
Publikováno v:
AIMS Materials Science, Vol 6, Iss 6, Pp 911-943 (2019)
We studied the synthesis variables of the faujasite using natural clinker of the Cotopaxi volcano, and allophane (allofanite) from the province of Santo Domingo de los Tsachilas as raw materials, as well as their physicochemical properties and their
Externí odkaz:
https://doaj.org/article/4c370e2597a944ed854723016b5b4e39
Autor:
Edward Henry Jiménez Calderón, Ana Emperatriz Paucar Tipantuña, Paulina Fernanda Herrera Mullo, Daniel Alejandro Hidalgo Cháfuel, Washington Ruiz, Ullrich Stahl, José Bermudez
Publikováno v:
Applied Sciences, Vol 10, Iss 9, p 3035 (2020)
The optimal conditions of the catalytic activation of allophane were evaluated for possible use as a catalyst within a fluidized bed catalytic cracking unit (FCC). The physicochemical properties of natural allophane and activated allophane were studi
Externí odkaz:
https://doaj.org/article/d2f14b79729344e3a50dd5fa8b668833
Autor:
Ullrich Stahl, Achim Voigt, Marian Dirschka, Nicole Barié, Christiane Richter, Ansgar Waldbaur, Friederike J. Gruhl, Bastian E. Rapp, Michael Rapp, Kerstin Länge
Publikováno v:
Sensors, Vol 17, Iss 11, p 2529 (2017)
Arrays with polymer-coated acoustic sensors, such as surface acoustic wave (SAW) and surface transverse wave (STW) sensors, have successfully been applied for a variety of gas sensing applications. However, the stability of the sensors’ polymer coa
Externí odkaz:
https://doaj.org/article/57911935c25544148e56a141583a8d35
Autor:
Edward, Jimenez, Hector, Mosquera, Marco, Cortez, Jimenez, Esteban, Ayala, Carlos E., Gustavo, Lopez, Ullrich, Stahl
In this work we show that the dynamics of chemical reactions of order zero, one and two have a representation through logistics probability. This probability is robust, stable and complies systemically with the differential equation of Fisher Kolmogo
Externí odkaz:
http://arxiv.org/abs/1609.09351
Autor:
Patricia Ochoa, Marco Rosero Espín, Humberto González, Magdalena Díaz, Cristina Castillo, Edward Jiménez, Ullrich Stahl, Diego Chulde
Publikováno v:
Repositorio Escuela Superior Politécnica de Chimborazo
Escuela Superior Politécnica de Chimborazo
instacron:ESPOCH
Escuela Superior Politécnica de Chimborazo
instacron:ESPOCH
El empleo de oxihidrógeno (HHO) en los motores de combustión interna de gran potencia, mejora su desempeño, en comparación con combustibles fósiles. El propósito de este trabajo es mostrar el potencial de producción electroquímica de HHO, as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9c95258952fffe8085385cdf2c6c6b6
https://doi.org/10.47187/perspectivas.vol3iss2.pp62-67.2021
https://doi.org/10.47187/perspectivas.vol3iss2.pp62-67.2021
Autor:
Ana Emperatriz Paucar, Edison Guacho, Paulina Herrera, Edward Jiménez, Patricia Ochoa, David Vaca, Gustavo López, Ullrich Stahl, Humberto González, Santiago Lalangui
Publikováno v:
AIMS Materials Science, Vol 6, Iss 6, Pp 911-943 (2019)
We studied the synthesis variables of the faujasite using natural clinker of the Cotopaxi volcano, and allophane (allofanite) from the province of Santo Domingo de los Tsachilas as raw materials, as well as their physicochemical properties and their
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79bf187e4c9b72da5870b5a2665255ae
https://doi.org/10.3934/matersci.2019.6.911
https://doi.org/10.3934/matersci.2019.6.911
Autor:
José Bermudez, Ullrich Stahl, Washington Ruiz, Paulina Fernanda Herrera Mullo, Ana Emperatriz Paucar Tipantuña, Edward Henry Jiménez Calderón, Daniel Alejandro Hidalgo Cháfuel
Publikováno v:
Applied Sciences
Volume 10
Issue 9
Applied Sciences, Vol 10, Iss 3035, p 3035 (2020)
Volume 10
Issue 9
Applied Sciences, Vol 10, Iss 3035, p 3035 (2020)
The optimal conditions of the catalytic activation of allophane were evaluated for possible use as a catalyst within a fluidized bed catalytic cracking unit (FCC). The physicochemical properties of natural allophane and activated allophane were studi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ba3b6a2978f358d193632355ada3a5e
Autor:
Bastian E. Rapp, M. Dirschka, Michael Rapp, Friederike J. Gruhl, Achim Voigt, Kerstin Länge, Christiane Richter, Nicole Barié, Ansgar Waldbaur, Ullrich Stahl
Publikováno v:
Sensors and Actuators B: Chemical. 274:560-564
Arrays with polymer-coated sensors have successfully been introduced for the detection of volatile organic compounds (VOC). The VOCs are typically identified via the signal pattern delivered by the sensor array. Therefore, if the VOCs are to be monit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b262b38ab0824dcd37a07aab913f08d1
https://doi.org/10.1016/j.snb.2018.08.013
https://doi.org/10.1016/j.snb.2018.08.013
Publikováno v:
Educación Química. 28:196-201
James Wei, profesor del «Department of Chemical Engineering-MIT» empleó el concepto de paradigma en 1988, introducido por T. Kuhn, para caracterizar las etapas evolutivas de la ingeniería química. Wei identificó 3 períodos: el preparadigmátic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e91b97e1fc4145397ba0fe08aaec0f7b
https://doi.org/10.1016/j.eq.2017.05.002
https://doi.org/10.1016/j.eq.2017.05.002