Study on moisture distribution of multi-surround oil-paper insulation under moist environment

Author(s):  
Ran Zhuo ◽  
Ye Tian ◽  
Mingli Fu ◽  
Quanmin Dai ◽  
Bo Qi ◽  
...  
2021 ◽  
Author(s):  
Kerry H Cook ◽  
Edward K. Vizy

Abstract The processes that determine the seasonality of precipitation in the Congo Basin are examined using the atmospheric column moisture budget. Studying the fundamental determinants of Congo Basin precipitation seasonality supports process-based studies of variations on all time scales, including those associated with greenhouse gas-induced global warming. Precipitation distributions produced by the ERA5 reanalysis provide sufficient accuracy for this analysis, which requires a consistent dataset to relate the atmospheric dynamics and moisture distribution to the precipitation field. The Northern and Southern Hemisphere regions of the Congo Basin are examined separately to avoid the misconception that Congo Basin rainfall is primarily bimodal. While evapotranspiration is indispensable for providing moisture to the atmospheric column to support precipitation in the Congo Basin, its seasonal variations are small and it does not drive precipitation seasonality. During the equinoctial seasons, precipitation is primarily supported by meridional wind convergence in the moist environment in the 800 hPa to 500 hPa layer where moist air flows into the equatorial trough. Boreal fall rains are stronger than boreal spring rains in both hemispheres because low-level moisture divergence develops in boreal spring in association with the developing Saharan thermal low. The moisture convergence term also dominates the moisture budget during the summer season in both hemispheres, with meridional convergence in the 850-600 hPa layer as cross-equatorial flow interacts with the cyclonic flow about the Angola and Sahara thermal lows. Winter precipitation is low because of dry air advection from the winter hemisphere subtropical highs over the continent.


Author(s):  
G. M. Hutchins ◽  
J. S. Gardner

Cytokinins are plant hormones that play a large and incompletely understood role in the life-cycle of plants. The goal of this study was to determine what roles cytokinins play in the morphological development of wheat. To achieve any real success in altering the development and growth of wheat, the cytokinins must be applied directly to the apical meristem, or spike of the plant. It is in this region that the plant cells are actively undergoing mitosis. Kinetin and Zeatin were the two cytokinins chosen for this experiment. Kinetin is an artificial hormone that was originally extracted from old or heated DNA. Kinetin is easily made from the reaction of adenine and furfuryl alcohol. Zeatin is a naturally occurring hormone found in corn, wheat, and many other plants.Chinese Spring Wheat (Triticum aestivum L.) was used for this experiment. Prior to planting, the seeds were germinated in a moist environment for 72 hours.


2020 ◽  
Vol 04 ◽  
Author(s):  
Sourav Mohanto ◽  
Prithviraj Chakraborty ◽  
Chidambaram Soundra Pandian ◽  
Shubhradeep Manna ◽  
Joni Dutta

Background: The design and characteristics of alginate biomaterial have a significant role in wound dressing and tissue regeneration. The ideal biomaterial for wound dressing must have biodegradable, biocompatible, non-inflammatory, non-toxic. Objective: Wound dressing should promote the re-epithelization and protect the wound for further infection by creating a moist environment. The physical and mechanical nature of the alginate biopolymer has the potential to influence the pathophysiological mechanisms in the chronic wound actively. The application of this biomaterial provides an ampule advantage to synthetic polymers. Method: The wound healing process is a critical step involved in different phases. The presence of cross-linkers, polymers along with alginate lead to a decrease in the mechanical property of dressing. Hence the effective material choosing along with alginate is a very critical decision. The therapeutic efficacy of the alginate dressing system (film, hydrogel, wafer, etc.) influenced by the incorporation of different materials such as bioactive agents, nanoparticles, cross-linker, nature of the excipients, etc. Results: The ion exchange occurring between dressing and exudates resulted in the formation of gel, due to the glucuronic acid presence in alginate. This gel absorbs moisture and maintains an appropriate moist environment and actively influence the pathophysiological mechanisms in the chronic wound. Conclusion: This review gives a detailed knowledge of the researchers to work with alginate and provides knowledge about the incorporation of the appropriate material and their therapeutic efficacy in wound dressing.


2001 ◽  
Vol 66 ◽  
Author(s):  
M. Aslanidou ◽  
P. Smiris

This  study deals with the soil moisture distribution and its effect on the  potential growth and    adaptation of the over-story species in north-east Chalkidiki. These  species are: Quercus    dalechampii Ten, Quercus  conferta Kit, Quercus  pubescens Willd, Castanea  sativa Mill, Fagus    moesiaca Maly-Domin and also Taxus baccata L. in mixed stands  with Fagus moesiaca.    Samples of soil, 1-2 kg per 20cm depth, were taken and the moisture content  of each sample    was measured in order to determine soil moisture distribution and its  contribution to the growth    of the forest species. The most important results are: i) available water  is influenced by the soil    depth. During the summer, at a soil depth of 10 cm a significant  restriction was observed. ii) the    large duration of the dry period in the deep soil layers has less adverse  effect on stands growth than in the case of the soil surface layers, due to the fact that the root system mainly spreads out    at a soil depth of 40 cm iii) in the beginning of the growing season, the  soil moisture content is    greater than 30 % at a soil depth of 60 cm, in beech and mixed beech-yew  stands, is 10-15 % in    the Q. pubescens  stands and it's more than 30 % at a soil depth of 60 cm in Q. dalechampii    stands.


Sign in / Sign up

Export Citation Format

Share Document