Distribution and gradient analysis of Ink disease in chestnut forests

2010 ◽  
Vol 40 (2) ◽  
pp. 73-86 ◽  
Author(s):  
A. Vannini ◽  
G. Natili ◽  
N. Anselmi ◽  
A. Montaghi ◽  
A. M. Vettraino
Keyword(s):  
Gradient Analysis ◽  
Ink Disease

scholarly journals Ribonucleic Acid Biosynthesis in Human Leukocytes

Blood ◽  
1966 ◽  
Vol 28 (2) ◽  
pp. 188-200 ◽  
Author(s):  
MARTIN J. CLINE
Keyword(s):  
Density Gradient ◽  
Ribonucleic Acid ◽  
Turnover Rate ◽  
Rna Synthesis ◽  
Gradient Analysis ◽  
Sucrose Density Gradient ◽  
Acid Biosynthesis ◽  
Total Load ◽  
Human Leukocytes ◽  
Particle Ingestion

Abstract Phagocytosis has profound effects on several aspects of the RNA metabolism of human leukocytes. The major changes induced by particle ingestion appear to be (1) an increased uptake of pyrimidine precursors from the suspending medium, (2) a contraction in the size of the nucleotide pool, (3) an accelerated rate of destruction of preexisting RNA, and (4) an increased rate of RNA synthesis. Sucrose density gradient analysis of the newly synthesized RNA suggests that several classes of RNA are involved in this process. The increased turnover rate of the nucleotide pool and of the cellular RNA of the leukocyte is proportional, within limits, to the total load of ingested particles.

ANALYSIS OF RIBOSOMES AND POLYSOMES DERIVED FROM RABBIT MAMMARY GLANDS DURING PREGNANCY AND LACTATION

1971 ◽  
Vol 49 (4) ◽  
pp. 667-NP ◽  
Author(s):  
I. D. HERRIMAN ◽  
G. D. BAIRD ◽  
JUDY M. BRUCE
Keyword(s):  
Electron Microscopy ◽  
Density Gradient ◽  
Gradient Analysis ◽  
Late Pregnancy ◽  
Sucrose Density Gradient ◽  
Mammary Glands ◽  
Pregnancy And Lactation

SUMMARY Whole-ribosome and polysome-enriched fractions were prepared from the mammary glands of rabbits during late pregnancy and lactation. The composition of the fractions was determined by sucrose density gradient analysis and electron microscopy. The range of size of polysomal aggregates was similar in the late-pregnant and lactating gland, with aggregates containing five to nine ribosomal units predominating. However, the amount of polysomes relative to monosomes was invariably found to increase after parturition. The greater portion of this increase was accounted for by the increased abundance of aggregates containing five to nine units.

scholarly journals Phytophthora cryptogea causing ink disease of Castanea sativa newly reported in Greece

2010 ◽  
Vol 59 (4) ◽  
pp. 799-799 ◽  
Author(s):  
C. Perlerou ◽  
G. Tziros ◽  
A. M. Vettraino ◽  
S. Diamandis
Keyword(s):  
Castanea Sativa ◽  
Phytophthora Cryptogea ◽  
Ink Disease

scholarly journals Impacts of Landscape Patterns on Ecosystem Services Value: A Multiscale Buffer Gradient Analysis Approach

2021 ◽  
Vol 13 (13) ◽  
pp. 2551
Author(s):  
Wanxu Chen ◽  
Jie Zeng ◽  
Yumei Chu ◽  
Jiale Liang
Keyword(s):  
Sustainable Development ◽  
Ecosystem Services ◽  
Landscape Pattern ◽  
Gradient Analysis ◽  
Buffer Zone ◽  
Landscape Patterns ◽  
Analysis Approach ◽  
Landscape Pattern Metrics ◽  
Pattern Metrics ◽  
Ecosystem Services Value

In recent decades, substantial changes have occurred in the spatial structure and form of landscapes in metropolises; these have greatly impacted ecosystem provision capacities. Clarifying the impact mechanism of landscape patterns on ecosystem services can provide insights into regional ecological conservation and sustainable development measures. Although previous studies have explored the impacts of landscape patterns on ecosystem services at multiple scales, few studies have been conducted using the buffer gradient analysis approach. Using land-use/cover change data, this study measured the evolution of spatiotemporal features of landscape patterns and ecosystem services value (ESV) with 1, 2, and 3 km buffer-zone scales in Wuhan, China. Econometric models were then used to analyze the impacts of landscape patterns on ecosystem services at different buffer-zone scales. The results demonstrated that rapid urbanization in Wuhan has led to significant changes in landscape patterns, and the landscape pattern metrics exhibited significant spatial heterogeneity. The ESV in Wuhan exhibited a steady decline during the study period. Hydrological regulations and waste treatment functions contributed to the largest proportion of ESV, and raw material production functions contributed to the lowest proportion. Landscape pattern metrics exerted a significant influence on ESV; however, this influence varied greatly. The results of this study provide a new understanding of the influence mechanism of landscape patterns on ecosystem services at 1, 2, and 3 km buffer-zone scales. These findings are critical for facilitating landscape planning and regional sustainable development.

Determining the Wetland-Dryland Boundary of Depressions Using Littoral Gradient Analysis of Soil Edaphic Factors

Wetlands ◽  
2021 ◽  
Vol 41 (6) ◽  
Author(s):  
Basanda Xhantilomzi Nondlazi ◽  
Moses Azong Cho ◽  
Heidi van Deventer ◽  
Erwin Jacobus Sieben
Keyword(s):  
Gradient Analysis ◽  
Edaphic Factors

scholarly journals Stress Field Gradient Analysis Technique Using Lower-OrderC0Elements

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Jianwei Xing ◽  
Gangtie Zheng
Keyword(s):  
Stress Field ◽  
Lower Order ◽  
Gradient Analysis ◽  
Stress Gradient ◽  
Mathematical Technique ◽  
Element Analysis ◽  
Analysis Technique ◽  
Penrose Pseudoinverse ◽  
Element Type ◽  
Inconsistent Equation

For evaluating the stress gradient, a mathematical technique based on the stress field of lower-orderC0elements is developed in this paper. With nodal stress results and location information, an overdetermined and inconsistent equation of stress gradient is established and the minimum norm least squares solution is obtained by the Moore-Penrose pseudoinverse. This technique can be applied to any element type in comparison with the superconvergent patch (SCP) recovery for the stress gradient, which requires the quadratic elements at least and has to invert the Jacobi and Hessian matrices. The accuracy and validity of the presented method are demonstrated by two examples, especially its merit of achieving high accuracy with lower-order linearC0elements. This method can be conveniently introduced into the general finite element analysis programs as a postprocessing module.

Gradient Models, Gradient Analysis, and Hierarchical Structure in Plant Communities

Oikos ◽  
1997 ◽  
Vol 78 (1) ◽  
pp. 23 ◽  
Author(s):  
Bruce W. Hoagland ◽  
Scott L. Collins
Keyword(s):  
Plant Communities ◽  
Hierarchical Structure ◽  
Gradient Analysis ◽  
Gradient Models

SEDIMENTATION PROFILES OF THE OESTROGEN RECEPTOR FROM BREAST TUMOURS OF MAN AND RAT USING VERTICAL-TUBE ROTOR CENTRIFUGATION

1980 ◽  
Vol 86 (3) ◽  
pp. 431-442 ◽  
Author(s):  
B. FREEDMAN ◽  
R. A. HAWKINS
Keyword(s):  
Oestrogen Receptor ◽  
Gradient Analysis ◽  
Molecular Form ◽  
Sucrose Density Gradient ◽  
Vertical Tube ◽  
Human Breast ◽  
Reproductive State ◽  
Prediction Of Response ◽  
Mammary Tumours ◽  
And Storage

In rat mammary tumours and uteri it was found that reaction time, ionic strength, reproductive state and storage in liquid nitrogen affected the form of the oestrogen receptor detected by sucrose density-gradient analysis using a vertical-tube rotor. A standard method of gradient analysis was defined. The sedimentation profile of the oestrogen receptor was compared in three types of experimental rat mammary tumour of known hormonal sensitivity. These were two lines of ovary-independent transplantable tumours and those tumours induced by dimethylbenz(a)anthracene (DMBA) which are mainly ovary-dependent. In all three types of tumour the 8S receptor was the predominant molecular form (32 out of 36 tumours induced by DMBA and 11 out of 13 transplantable tumours). Sedimentation profiles of the oestrogen receptor were also examined in 46 human breast carcinomata found to be receptor-positive by the dextran-coated charcoal technique. Of these, 17 were found to be receptor-negative by gradient analysis and 28 out of 29 receptor-positive tumours contained 8S receptor. It was concluded that (1) 8S receptor is the predominant molecular form in both human and rat mammary tumours, (2) molecular form of receptor is not related to ovarian dependence in these rat mammary tumours and (3) gradient analysis seems unlikely to provide additional discrimination in the prediction of response to endocrine therapy over that provided by simpler methods.

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