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Acute exposure to hyperosmotic conditions reduces sperm activation by urine in the yellowtail tetra Astyanax altiparanae, a freshwater teleost fish

Rocha, Nathalia Alcântara; Schade, Gabriel Marra; Alves, Álvaro de Miranda; Silva, Claudia de Souza; Nakirimoto, Jacqueline Megumi; Lauri, Liura Sanchez; Campos, Lucca Gobatto; Santos, Marcelo Galvão dos; Mesquita, Nicole Nascimento; Relvas, Rachel Sordi; Carnevale, Rafaella Fernandes; Oh, Se Yoon; Gaia, Victoria Portela Diniz; Kida, Vivian Renata; Celeghini, Eneiva Carla Carvalho; Assumpção, Mayra Elena Ortiz D’ Avila; Senhorini, José Augusto; Siqueira, Hatus de Oliveira; Nascimento, Nivaldo Ferreira; Silva, Luciano Andrade; Lázaro, Talita Maria; Visintin, José Antonio; Monzani, Paulo Sérgio; Yasui, George Shigueki.
Braz. J. Vet. Res. Anim. Sci. (Online); 57 (3), 2020
In freshwater fish with external fertilization, sperm sampling can be contaminated with urine, which triggers motility and gives rise to decreased fertilization success. The maintenance of freshwater fish in hyperosmotic conditions may reduce urine production and improve sperm quality. Thus, the aim of t...
Characidae/fisiología, Ósmosis, Salinidad, Análisis de Semen/veterinaria, Análisis de Semen/métodos, Motilidad Espermática
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Betaine supplementation improved L-threonine fermentation of Escherichia coli THRD by upregulating zwf (glucose-6-phosphate dehydrogenase) expression

Li, Yanjun; Zhang, Dezhi; Cai, Ningyun; Han, Chao; Mao, Qiang; Wang, Ting; Zhou, Qian; Chen, Ning; Xie, Xixian.
Electron. j. biotechnol; 39 (), 2019
BACKGROUND: The supplementation of betaine, an osmoprotective compatible solute, in the cultivation media has been widely used to protect bacterial cells. To explore the effects of betaine addition on industrial fermentation, Escherichia coli THRD, an L-threonine producer, was used to examine the product...
Treonina/metabolismo, Betaína/metabolismo, Escherichia coli/metabolismo, Fermentación, NADP, Ósmosis, Glucosafosfato Deshidrogenasa/metabolismo, Reacción en Cadena de la Polimerasa de Transcriptasa Inversa, Escherichia coli/enzimología, Vía de Pentosa Fosfato
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