The topic of frost formation on the heat exchanger surface has been gaining interest since late 1940s. Scientists and industrial engineers from many scientific R&D units around world have trying to understand nature frosting implement solutions prevent such an unwanted phenomenon having a significant impact performance exchangers (such as decrease in transfer efficiency, mechanical damage, ...

In response to cold stress, Drosophila Melanogaster increase their expression of Frost, a candidate gene involved in cold response. The direct role of Frost in cold tolerance is yet to be determined, and its importance for survival in cold environments has been questioned. In this study, I attempt to better understand the molecular machinery of Frost by selecting for its protein in fly lysate k...

Abstract The inhibition of condensation frosting at harsh environments is critical in various anti-icing applications. However, on the entire surface final fate for most passive strategies as a result inevitable ice nucleation subcooled droplets from edges or defects and following inter-droplet freezing wave propagation. Here, we report frost-free zone formation macro-ridged surface. We design ...

zayanderoud basin is one of the important agricultural areas in country level because of climatic variety and resuscitative water of zayanderoud river. since frost phenomenon especially late spring frost incurs great damages on fruit trees and agricultural products of this region, it is necfessary to study frost in this basin.in this research, the intensity of frost during cold period and sprin...

Several studies document lengthening of the frost-free season within the conterminous United States (U.S.) over the past century, and report trends in spring and fall frost timing that could stem from hemispheric warming. In the absence of warming, theory and case studies link anomalous frost timing to atmospheric circulation anomalies. However, recent efforts to relate a century of observed ch...

The paper presents the results of a study frost formation on surface heat exchanger fins when moist air flow is flown around. description experimental stand and procedure are given. effect efficiency transfer was estimated from time temperature dependences at various points fin surface. During experiments, thickness layer degree overlap intercostal spaces were monitored visually using an anemom...

The hydrophobicity and anti-icing performance of the surfaces of some artificial hydrophobic coatings degraded after several icing and de-icing cycles. In this paper, the frost formation on the surfaces of butterfly wings from ten different species was observed, and the contact angles were measured after 0 to 6 frosting/defrosting cycles. The results show that no obvious changes in contact angl...

Both the existence and the cause of protection, by nonpenetrating solutes such as sugars, against freezing injury to plant cells have been alternatively and repeatedly proclaimed and questioned for some time. Since theories of the mechanism of frost injury have been both rejected (8) and proposed (2, 3) on the basis of this protection, it is of fundamental importance to understand the reasons f...

Abstract Permafrost and seasonally frozen ground are important surface features in highlatitudes. Because of this, a soil-frost parameterization was added to the Penn State University/NCAR mesoscale meteorological model MM5 in combination with the well validated hydro-thermodynamic soil vegetation scheme HTSVS, which takes into account among other things soil freezing and thawing. Reanalysis of...

Wheat is able to cold acclimate in response to low temperatures and thereby increase its frost tolerance and the extent of this acclimation is greater in winter genotypes compared to spring genotypes. Such up-regulation of frost tolerance is controlled by Cbf transcription factors. Molybdenum (Mo) application has been shown to enhance frost tolerance of wheat and this study aimed to investigate...