Southwest University

Chongqing Yuhua New Materials Technology Co., Ltd.

Liang Ma

Xiaohua Wang

Yuhao Zhang

Xiaochen Qian

Zhou Zhang

Jianhua Zhou

Hongyuan Zhou

Shan Xu

Xiaogui Guo

The present disclosure provides an all-metal dissolvable ball seat for self-compensating fracturing. The ball seat includes a tie rod, an expansion head, a sealing tube, a cone and a slip. The upper end of the tie rod is threadedly connected with a seating tool, and the lower end of the tie rod is connected with an internal thread of a base. The tie rod is located in the center of the shaft, and the locking joint, expansion head, sealing tube, cone, and slip are sequentially set on the tie rod.

All-metal dissolvable ball seat for self-compensating fracturing

A method for establishing a biological model on joint toxicity ofand an application thereof are provided. The method for establishing the biological model includes adding the L1-stageto a mixed system of working solution of mycotoxins containing tenuazonic acid and penicillin, K-medium solution andOP50 to obtain L1-stage. The biological model indicates that TeA and PAT have a synergistic effect on the growth, development and reproductive ability of, and their toxicity mechanism is related to inducing nematodes and stimulating transcriptional factors of Daf-16 genes. The biological model and detection method are simple to operate and its test period is short.

Method for establishing biological model on joint toxicity of Caenorhabditis elegans and application thereof

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Chongqing, China

Liang Ma