The process of flow generation with metachronally beating pleopods in a tubiform burrow was studied by designing a hydrodynamic model based on a thrust-drag force balance. The drag of the tube (including the shrimp) comprises components for accelerating the water into the tube entrance, for adjusting a parabolic velocity profile, for accelerating the flow into a constriction due to the shrimp's...

Plant sexual reproduction depends on highly specific interactions between pollen and pistil, the male gametophyte and the female reproductive organ, respectively (1, 2). The pistil is composed of three major structural parts: the stigma, the style, and the ovary. The stigma has a pollen-receptive surface and several underlying secretory cell layers. The style connects the stigma to the basally ...

Abstract Francis turbines operating in off-design conditions are subject to pressure fluctuations resulting from the development of hydrodynamic instabilities draft tube. Depending on nature flow-induced (synchronous or convective), this may induce dynamic stresses runner blades, increasing fatigue and risk crack propagation. This paper proposes identify impact tube flow turbine runners. Measur...

The function of tubular epithelial organs like the kidney and lung is critically dependent on the length and diameter of their constituting branches. Genetic analysis of tube size control during Drosophila tracheal development has revealed that epithelial septate junction (SJ) components and the dynamic chitinous luminal matrix coordinate tube growth. However, the underlying molecular mechanism...

concentration of 21%. In this incident the sampling tube damage in the operating theatre was not detected by visual inspection. We believe that atmospheric oxygen reached the anaesthetic gas analyser unit through the break in the gas sampling tube. The gold standard check that a breathing circuit is not blocked is by the use of capnography to demonstrate that expired air can pass retrogradely i...

ARTICLE INFO a The temperature of earth is increasing drastically in the past few years due to which water temperature is also increasing. Water cooler is a device used to cool the temperature of water so that it is suitable for drinking purpose. This system works on the principle of vapour compression refrigeration system. CFC 22 is currently used in the system, but because of its high GWP and...

Anti-vibration bars (AVBs) are essential components of a steam generator (SG) and used to prevent tubes (SGTs) from vibrating intensely because flow-induced vibration. However, the contact force generated at surfaces between AVBs can change natural frequency wear behavior tube. Contact is represented by clamping in this study. Considering effect on sliding distance SGT, dynamic under different ...

Pollination in flowering plants begins when pollen lands on a stigma. The process continues as the pollen germinates and grows through intercellular spaces in the pistil, and it culminates when the pollen reaches the ovary and fertilization occurs. This complex and hazardous process involves many interactions, including cell–cell recognition and intracellular and intercellular signaling, as wel...

The antifungal activity of the essential oil of Lavandula angustifolia Mill. (lavender oil) and its main components, linalool and linalyl acetate, was investigated against 50 clinical isolates of Candida albicans (28 oropharyngeal strains, 22 vaginal strains) and C. albicans ATCC 3153. Growth inhibition, killing time and inhibition of germ tube formation were evaluated. The chemical composition...