In this paper we show the lower bound of the set of non-zero−K for normal surface singularities establishing that this set has no accumulation points from above. We also prove that every accumulation point from below is a rational number and every positive integer is an accumulation point. Every rational number can be an accumulation point modulo Z. We determine all accumulation points in [0, 1...

crop simulation models are increasingly used in agriculture. these models help in saving time and expenses. the objective of this study was to evaluate cropsyst model in predicting development, growth and yield of wheat cultivars from golestan province. to do this, experimental data from different experiments were gathered for kohdasht, shiroodi, tajan and zagros. model performance in simulatin...

Abstract Jujube leaf tea is a functional beverage that soothes the nerves. In this study, we evaluated effects of carbendazim and harpin on disease index, biomass accumulation, H 2 O , antioxidant contents, phenyl alanine ammonia lyase (PAL) activity in young jujube leaves. Compared to harpin, decreased index induced higher content. Additionally, pesticide reduced accumulation. contrast, increa...

This research (1) analyzed the content of Pb and Cd in water sediment; (2) physical chemical parameters water; (3) determined enrichment factor accumulation index sediments; (4) to identified quality based on Pollution Index (IP) STORET. The analysis was carried out using PCA (Principal Component Analysis) Pearson's correlation, conducted downstream section Musi River, Palembang, a random sampl...

To accurately understand soil environmental quality and improve the problem of traditional method, which is that it has a single evaluation factor cannot reflect overall condition soil, complex geological heavy metal modeling method based on Nemerow index proposed. Index methods, ArcGIS technology, human health risk assessment were carried out to obtain spatial distribution metals in current st...

We evaluated limits to the accumulation of deficits (symptoms, diseases, disabilities) for 33,069 people aged 65+ years. We combined deficits in a frailty index (theoretical range 0–1) and found that the 99% limit varied little between samples, representing a frailty index value of about 0.65 0.05. This near-maximum shows no relationship with age. It is the same in community and institutional s...

After the analysis of surface samples and core samples collected in Xinyanggang tidal land, the contents of Pb, Cu, Zn, and Cr were obtained and analyzed in this paper. The heavy metal accumulation rule and pollution status were studied by Index of geo-accumulation, latent ecological risk index method, and elements accumulation index method. The research suggests that (1) the contents of heavy ...

this research was carried out for evaluation of competitive ability of some wheat cultivars (triticum aestivum l.) of recommended wheat in dargaz region with common weed of feral rye (secale cereale). experiment was conducted as factorial based on randomized complete block design with three replications in 2010-2011 growing season. experimental factors were included four wheat cultivars of says...

in order to evaluate the interference effect natural population weeds and plant density, an experiment with randomized complete block design in factorial arrangement with 4 replications was conducted in 2006 in a field experiment at ramin agricultural and natural resources university, khouzestan. treatments included two factor, plant density of corn at three levels (4, 7 and 10 plants m-2) and ...

in this study, the concentrations of heavy metals (ca, zn, cu, fe, mn, ni) in thesediment of shavoor river in khuzestan province in iran has been investigated. after the library studies and field studies, six samples of water and sediment were taken from the river in order to evaluate heavy metal pollution in sediments. to determine the geochemical phases of metals in sediment samples the 5-ste...