Optimal chemotaxis in intermittent migration of animal cells

Optimal chemotaxis in animal cell intermittent migration

Animal cells can sense chemical gradients without moving, and are faced with the challenge of migrating towards a target despite noisy information on the target position. Here we discuss optimal search strategies for a chaser that moves by switching between two phases of motion (run and tumble), reorienting itself towards the target during tumble phases, and performing a persistent random walk ...

Leukocyte chemotaxis and migration: can we follow the cells?

A CRITICAL feature of the innate immune response is the movement of neutrophils and macrophages from one site in the body to another to provide effector functions. These immune cells play a critical role in fighting infection but may also cause damage to parenchymal cells by releasing oxidants and proteases. Although the molecular mechanisms of leukocyte chemotaxis during inflammation have been...

Bayes-Optimal Chemotaxis

Chemotaxis plays a crucial role in many biological processes, including nervous system development. However, fundamental physical constraints limit the ability of a small sensing device such as a cell or growth cone to detect an external chemical gradient. One of these is the stochastic nature of receptor binding, leading to a constantly fluctuating binding pattern across the cell's array of re...

Survival of Bordetella pertussis in Tissue Culture of Animal Cells

optimal joint survival probability of xl reinsurance contracts in iran insurance company

اگر تنها یک صنعت جهت حفظ تعادل در بازار جهانی ضروری باشد، می توان ادعا نمود که آن صنعت بیمه است. صنعت بیمه بدون کمک صنعت بیمه اتکایی قادر به انجام وظیفه خویش نخواهد بود. اکثر تحقیقات انجام گرفته در زمینه بیمه اتکایی تنها با در نظر گرفتن منافع شرکت بیمه شده بوده است و منافع شرکت بیمه گر اتکایی کمتر مورد توجه بوده است. در این رساله با در نظر گرفتن منافع همزمان هر دو شرکت بیمه گذار اصلی و بیمه گر ...