Results 51 to 60 of about 147,937 (125)

La extensión como herramienta para mejorar el aprendizaje de la química [PDF]

, 2012
La experimentación en química, en el nivel secundario, está muy restringida debido al riesgo que implica el uso de muchos reactivos y a la falta de instrumentación electrónica empleada en laboratorios modernos de química.
Alvarez, María de las Mercedes, Gastaca, Belén, Iglesias, Dacio Adhemar, Latorre, Claudia, Ruiz, Danila Luján, Schiavoni, María de las Mercedes   +5 more
core   +1 more source

Withanolides and related steroids [PDF]

, 2011
Since the isolation of the first withanolides in the mid-1960s, over 600 new members of this group of compounds have been described, with most from genera of the plant family Solanaceae.
A Bhattacharya, A Cirigliano, A Kumar, A Mühlbauer, A Pecci, A Srivastava, A Yokosuka, A Yokosuka, A-L Perez-Castorena, AA Wube, AB Ray, AC Sharada, AC Waiss, AD Kinghorn, AG Damu, AH Januário, AL Pérez-Castorena, AL Risinger, AL Risinger, AM Abou-Douh, AM Cirigliano, AM Cirigliano, AM Cirigliano, AS Atta-ur-Rahman, AS Veleiro, AS Veleiro, AS Veleiro, AS Veleiro, AS Veleiro, ASR Anjaneyulu, ASR Anjaneyulu, AT Hunziker, AT Vieira, B Jayaprakasam, B Jayaprakasam, B Jayaprakasam, B Makino, B Makino, B Makino, B Yang, B Yang, B-N Su, B-N Su, B-N Su, B-N Su, BA Bhat, BJA Bravo, BR Madina, BR Madina, BS Siddiqui, BS Siddiqui, BS Siddiqui, BS Siddiqui, C Carcamo, C Mandal, C Tohda, C Z-l, C-F Huang, C-Y Ma, CA Elliger, CA Elliger, CE Vaccarini, CE Vaccarini, CMI Atta-ur-Rahman, CMI Atta-ur-Rahman, CP Cordero, D Alfonso, D Benjumea, D Cardona, D Cardona, D Damasceno Rocha, D Lavie, D Singh, DP Castro, DP Castro, E Glotter, E Jahan, E Maldonado, E Maldonado, E Maldonado, E-Shahwar D Atta-ur-Rahman, EJ Kennelly, ES Garcia, ES Monteagudo, ES Monteagudo, F Abe, F Echeverri, G Mareggiani, G Mareggiani, G Sen, GA Karikas, GL Silva, GM Bonetto, GV Subbaraju, H Ichikawa, H Kuang, H Matsuda, H Ripperger, H Yang, H-C Chang, H-Y Liu, HIF Magalhães, HIF Magalhães, HR Nawaz, HR Nawaz, HR Nawaz, I Vandenberghe, J March, J Zhao, J-Q Gu, J-Y Yang, JG Luis, JG Luis, JG Luis, JG Luis, JG Luis, JK Choi, K Panjamurthy, K Shingu, L Dinan, L Dinan, L Dinan, L Fang, L Ma, L Ma, L Ma, L Misra, L Misra, L Misra, L Qiu, L Qiu, LH Abdeljebbar, LN Dinan, M Ali, M Jiao, M Kaileh, M Kawai, M Kawai, M Kuroyanagi, M Lischewski, M Luna-Cavazos, M Manickam, M Manickam, M Manickam, M Manickam, M Manickam, M Nur-e-Alam, M Parvez, M Sahai, M Sharada, MA Mesaik, MBP Soares, MBP Soares, MC Tettamanzi, MC Tettamanzi, MC Tettamanzi, MC Tettamanzi, MI Choudhary, MI Choudhary, MI Choudhary, MI Choudhary, MI Choudhary, ML Veras, ML Veras, MTG Silva, N Kiyota, N Kiyota, N Riaz, N Sen, NC Vieira, ND Kannan, NJ Jacobo-Herrera, NS Ramacciotti, NV Kovganko, P Bargagna-Mohan, P Lal, P Neogi, P Uma Devi, P Uma Devi, P-C Kuo, P-W Hsieh, PM Khan, PM Khan, PM Khan, PS Vankar, Q-P He, R Chen, R Chen, R Maurya, R Mohan, R Niero, R Sunayama, RD Budhiraja, RD Enriz, RG Olmstead, RI Misico, RI Misico, RI Misico, RI Misico, RK Goel, RN Maiti, RR Gil, RS Sangwan, S Ahmad, S Ahmad, S Ahmad, S Ahmad, S Atta-ur-Rahman, S Bado, S Habtemariam, S Habtemariam, S Habtemariam, S Habtemariam, S Jha, S Jihui, S Minguzzi, S Nagafuji, S Pramanick, S Ray, S-T Fang, S-W Lee, SD Stan, SK Bhattacharya, SM Atta-ur-Rahman, SM Atta-ur-Rahman, SM Kupchan, T Hosoya, T Kuboyama, T Kuboyama, T Kuboyama, T Savchenko, TCB Tomassini, TL Tinley, TW Baumann, V Mulabagal, V Vande Velde, VE Nicotra, VE Nicotra, VE Nicotra, W-Y Chen, X-H Zhu, X-H Zhu, XH Zhu, Xu Y-m, Y Huang, Y Huang, Y Pan, Y Yokota, Y-H Kang, Y-H Lan, Y-Z Li, YM Atta-ur-Rahman   +251 more
core   +1 more source

LABORATORIO INTEGRAL DE QUÍMICA ORGÁNICA - QFB [PDF]

, 2017
GUÍA DE EVALUACIÓN DEL ...
GOMEZ ESPINOSA ROSA MARIA, GOMEZ MARTINEZ FRAZZI, PAVON FLORES MIRIAM   +2 more
core   +1 more source

Photocatalytic fluoroalkylation reactions of organic compounds [PDF]

, 2015
Photocatalytic methods for fluoroalkyl-radical generation provide more convenient alternatives to the classical perfluoroalkyl-radical (Rf) production through chemical initiators, such as azo or peroxide compounds or the employment of transition metals ...
Barata Vallejo, Sebastian, Bonesi, Sergio Mauricio, Postigo, Jose Alberto   +2 more
core   +1 more source

De las luciérnagas a la luz química [PDF]

, 2013
Las luciérnagas nos permiten comprender el fenómeno de bioluminiscencia, es decir, la emisión de luz fría por organismos vivos. Es una reacción química que usan las luciérnagas masculinas para atraer a las femeninas y éstas responden también emitiendo ...
Adam, Claudia Guadalupe, Bravo, Maria Virginia   +1 more
core   +1 more source

Structural factors of annonaceous acetogenins and their semisynthetic analogues related with the toxicity on Spodoptera frugiperda [PDF]

, 2015
Toxic and nutritional effects of annonaceous acetogenins and their semisynthetic analogues on Spodoptera frugiperda were evaluated. Structural modification of the natural ACG, blocking the OH flanking THF with MOM, allowed us to suggest the mode of ...
Bardon, Alicia del Valle, Brovetto, Margarita, Budeguer, Florencia, Di Toto Blessing, Lilian Edith, Díaz, Sonia Beatriz, Neske, Adriana, Ramos, Juan, Seoane, Gustavo   +7 more
core   +1 more source

Lighting the Way: Supramolecular Luminescent Chemosensors for a Safer Environment

ChemistryEurope, Volume 4, Issue 2, February 2026.
In this Guest Editorial, the special issue of ChemistryEurope on supramolecular luminescent chemosensors (LCs) is presented, showcasing selected contributions from members of the COST Action LUCES (CA22131). LCs are a versatile means to sensitively and selectively detect pollutants and biologically relevant molecules.
Laura Rodríguez
wiley   +1 more source

Virtual Campus and Facebook in the university. Enemies or Allies in the teaching and learning processes? [PDF]

, 2013
Hoy en día nuestros alumnos viven una nueva era comunicativa. Desde hace varios años los químicos utilizan la tecnología para la enseñanza y el aprendizaje en los distintos niveles de educación.
Mansilla, Daniela Soledad, Muscia, Gisela Celeste, Ugliarolo, Esteban Ariel   +2 more
core   +1 more source

Unsymmetrical β‐Fused Blatter Radical Zinc Phthalocyanines

Chemistry – A European Journal, Volume 32, Issue 4, 23 January 2026.
Herein, we report the first synthesis of a new class of β‐fused Blatter–Zn phthalocyanines featuring a persistent radical π‐system, π–π‐driven crystal packing, and SOMO‐centered redox behavior. Single‐crystal X‐ray diffraction shows packing motifs dominated by centrosymmetric π‐π dimers.
Adrián Hernández, Georgia A. Zissimou, Javier Ortiz, Andreas Kourtellaris, Christos P. Constantinides, Daniel B. Lawson, Ziqi Hu, Eugenio Coronado, Panayiotis A. Koutentis, Ángela Sastre‐Santos   +9 more
wiley   +1 more source

La Química Orgánica: colección de materiales para el aprendizaje en un entorno abierto [PDF]

, 2015
Materiales creados para facilitar el autoestudio de la química Orgánica a nivel básico y medio, que se podrán implementar en una página ...
Campayo Pérez, Lucrecia, Cano Benjumea, Maria del Carmen, Rodríguez Yunta, María Josefa   +2 more
core   +1 more source