In this article we investigate aspects of turgor-driven plant cell growth within the framework of a model derived from the Eulerian concept of instability. In particular we explore the relationship between cell geometry and cell turgor pressure by extending loss of stability theory to encompass cylindrical cells. Beginning with an analysis of the three-dimensional stress and strain of a cylindr...

Through wall imaging (TWI) using microwave radar system is an experimental approach in real time to collect the information about the living/nonliving target object hidden behind the wall made of any dielectric material and unknown thickness. The true and exact information of the target object is dependent not only on the wall parameters (thickness and dielectric constant) but also on the opera...

The mechanism by which endogenous cessation of coleoptile elongation after emergence of the primary leaf is brought about was investigated in rye seedlings {Secale cereale L.) that were either grown in darkness or irradiated with continuous white light. In 3-d-old etiolated (growing) coleoptiles a turgor pressure of 0.59 MPa was measured. In 6-d-old coleoptiles, which had ceased to elongate, ce...

As the outer boundary of plant cells, the cell wall is integral to all aspects of plant growth, development, and interactions with the environment. Dicot primary cell walls are composed of a network of cellulose, hemicellulose and proteins embedded in a matrix of acidic pectins. Pectins are synthesized in the Golgi apparatus by the sequential addition of nucleotide sugars by glycosyltransferase...

The metabolic complexity of living organisms relies on supramolecular protein structures which ensure vital processes, such as signal transduction, transcription, translation and cell wall synthesis. In eukaryotes WD40-repeat (WDR) proteins often function as molecular "hubs" mediating supramolecular interactions. WDR proteins may display a variety of interacting partners and participate in the ...

background and objective: mediastinal masses in children are a heterogenous group of asymptomatic potentially life-threatening congenital, infectious, or neoplastic lesions that present complex diagnostic and therapeutic dilemmas. materials and methods: the clinical and laboratory features of 65 patients who had open biopsies in ali-asghar hospital over 11 years were reviewed. results: seventy-...

osteosarcoma (osteogenic sarcoma: os) is the most common primary malignant bone tumor of long bones, whereas primary osteosarcoma of chest wall, especially in sternum, is extremely rare. we report a 57-year-old man with an immobile slow growing mass located in the middle of the sternum. the patient had no significant pain or tenderness and the past medical history was not remarkable. ct-scan sh...

We present a case of a 100-year-old woman living alone with ST-elevation myocardial infarction acute coronary syndrome of the infero-lateral wall treated with percutaneous coronary intervention. Coronary angiography revealed critical 99% stenosis in the marginal branch of the circumflex artery and insignificant lesions in other arteries. Two bare metal stents were implanted successfully in the ...

The water pipes of elongating plant organs are the result of programmed cell death and are formed by the walls of dead and empty protoxylem elements. These protoxylem elements are passively elongated many times by the surrounding tissue before they are replaced and collapse. Well-known adaptations for this unique task include the characteristic secondary wall thickenings, forming rings and heli...

Urban green infrastructures offer thermal regulation to mitigate urban heat island effects. To gain a better understanding of the cooling ability transpiring plants at leaf level, we developed method measure time series data with miniaturized, uncalibrated infrared camera. We examined canopy temperature four characteristic living wall (Heuchera x cultorum, Bergenia cordifolia, Geranium sanguine...