نتایج جستجو برای: flooding stress
تعداد نتایج: 451620 فیلتر نتایج به سال:
Flooding is a common stress factor in both natural and agricultural systems, and affects plant growth by the slow diffusion rate of gases in water. This results in low oxygen concentrations in submerged tissues, and hence in a decreased respiration rate. Understanding the responses of plants to flooding is essential for the management of wetland ecosystems, and may benefit research to improve t...
our data than the alternatives. We also stress-tested the entire system, which showed that HIDE can reliably detect UDP flooding attacks with attack intensity as low as five to ten percent of background traffic.
OBJECTIVE To explore the relationship between posttraumatic stress disorder (PTSD) and preflood behavioral characteristics among children aged 7-15 years in Hunan, China. SUBJECTS AND METHODS In 2000, a retrospective study was carried out among children who had been exposed to the 1998 floods in Hunan. A multistage sampling method was used to select subjects from the flood-affected areas. A s...
Climate change models predict an increase in the frequency of flooding events globally, making flooding stress a major environmental threat for plants. Annually, crop damages due to unseasonal and severe flooding events amount to billions of dollars in yield losses. Despite the vulnerability of most crops to wet conditions, there is significant variation in the plant tolerance to flooding. Plan...
this study attempted to explore if teaching english collocations through two different modes of awareness-raising and input flooding has any possible differential effect on immediate retention as well as retention in a delayed assessment. it also compared the possible differential effect of teaching english collocations implicitly and explicitly on actively using the items in writing. m...
Flooding induces low-oxygen stress, which reduces plant growth. The activity of the γ-aminobutyric acid (GABA) shunt is crucial for stress adaptation, in it acts by changing cytosolic pH, limiting reactive oxygen species production, regulating nitrogen metabolism, and bypassing steps tricarboxylic cycle. GABA accumulates under osmotic as well flooding stress. To clarify dynamic roles accumulati...
This study analyzes the incidence of posttraumatic stress disorder (PTSD) among flood victims, between different flood intensities, and between different time points after a flood. A search of several electronic literature databases was conducted to collect data on the incidence of PTSD after a flood. Loney criteria for research quality were used to evaluate the quality of selected search resul...
In structured peer-to-peer (p2p) networks such as CAN, Pastry, Chord and Tapestry, there are two general approaches of doing application layer multicast (ALM) i.e. tree building and flooding. In terms of latency, routing length and link stress, tree based ALM like Scribe on Pastry provides better performance than flooding based ALM like in CAN. In this paper, we propose Multiple-VirtualRings (M...
In this investigation, two species of Crataegus (hawthorn) were chosen because their polyphenolic constituents have recently received greater attention for the treatment of patients with severe heart disease. One-year-old plants of hawthorn (Crataegus laevigata and C. monogyna) were subjected to water-deficit (continuous water deprivation), cold (4 degrees C), flooding (immersion of roots of pl...
Some of the parameters that determine flooding resistance-and consequently habitat zonation-were investigated in four neotropical trees (Schizolobium parahyba, Sebastiania commersoniana, Erythrina speciosa and Sesbania virgata). The constitutive parameters of seeds (size, nature and amount of reserves) only partly influenced resistance to flooding, mainly through a high carbohydrate : size rati...
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