scholarly journals The geographical distribution of soil elements determines the boundaries of the Daodi-zone of medicinal plant (Ligusticum chuanxiong Hort.)

2021 ◽  
Author(s):  
Hongyang Lv ◽  
Hai Wang ◽  
Qian Fang ◽  
Lei Kang ◽  
Guiqi Han ◽  
...  
Keyword(s):  
Chemical Elements ◽  
Soil Characteristics ◽  
Pca Analysis ◽  
Natural Boundary ◽  
The West ◽  
Growth Environment ◽  
Icp Ms ◽  
Sample Points ◽  
Set Up ◽  
Production Zone

Abstract. Understanding the boundary of plants' best production zone is of great significance to the rational introduction cultivation. We set up 9 sample points in the center-zone and 28 sample points extending eastward along the longitude. Then, we were collecting the bulk soil of L.chuanxiong, testing soil properties and elements. Later, a multi-point cultivation test was carried out on L.chuanxiong, the content of elements in the plant measured by ICP-MS, and HPLC detected the active ingredients. Based on hierarchical clustering and PCA analysis, the study zone's soil element was divided into three groups. In the L.chuanxiong cultivation experiments, we found Ligustilide in rhizomes was positively related to Se and Sr and negatively related to Mn and the chemical elements. This study successfully verified that the medicinal plant's Daodi-zone has a natural boundary, and L.chuanxiong's Daodi-zone may be from east of Dujiangyan to the west edge of Longquan, rich in Na, Mg, K and Low Mn is the soil characteristics of the area. Moreover, we put forward a method to identify L.chuanxiong's Daodi-zone based on characteristic soil elements, which can also provide a practical basis for dividing other economic plants' growth environment.

Excavations at Fishbourne, 1963. Third Interim Report

1964 ◽  
Vol 44 (1) ◽  
pp. 1-8
Keyword(s):  
Interim Report ◽  
The West ◽  
Civic Society ◽  
North West ◽  
The Third ◽  
North East ◽  
The North ◽  
The Future ◽  
Set Up

Early in 1963 much of the land occupied by the Roman building at Fishbourne was purchased by Mr. I. D. Margary, M.A., F.S.A., and was given to the Sussex Archaeological Trust. The Fishbourne Committee of the trust was set up to administer the future of the site. The third season's excavation, carried out at the desire of this committee, was again organized by the Chichester Civic Society.1 About fifty volunteers a day were employed from 24th July to 3rd September. Excavation concentrated upon three main areas; the orchard south of the east wing excavated in 1962, the west end of the north wing, and the west wing. In addition, trial trenches were dug at the north-east and north-west extremities of the building and in the area to the north of the north wing. The work of supervision was carried out by Miss F. Pierce, M.A., Mr. B. Morley, Mr. A. B. Norton, B.A., and Mr. J. P. Wild, B.A. Photography was organized by Mr. D. B. Baker and Mrs. F. A. Cunliffe took charge of the pottery and finds.

Asian Scientists on the Move

2021 ◽  
Author(s):  
Anju Mary Paul
Keyword(s):  
Case Studies ◽  
Research Output ◽  
Scientific Field ◽  
First Century ◽  
The West ◽  
Migration System ◽  
Science Story ◽  
Scientific Research Output ◽  
Depth Analysis ◽  
Set Up

The growing scientific research output from Asia has been making headlines since the start of the twenty-first century. But behind this science story, there is a migration story. The elite scientists who are pursuing cutting-edge research in Asia are rarely 'homegrown' talent but were typically born in Asia, trained in the West, and then returned to work in Asia. Asian Scientists on the Move explores why more and more Asian scientists are choosing to return to Asia, and what happens after their return, when these scientists set up labs in Asia and start training the next generation of Asian scientists. Drawing on evocative firsthand accounts from 119 Western-trained Asian scientists about their migration decisions and experiences, and in-depth analysis of the scientific field in four country case studies - China, India, Singapore and Taiwan - the book reveals the growing complexity of the Asian scientist migration system.

Long-term fertility experiments for irrigated rice in the West African Sahel: effect on soil characteristics

2004 ◽  
Vol 85 (1) ◽  
pp. 61-77 ◽  
Author(s):  
S.M. Haefele ◽  
M.C.S. Wopereis ◽  
A.-M. Schloebohm ◽  
H. Wiechmann
Keyword(s):  
Soil Characteristics ◽  
West African ◽  
The West ◽  
Irrigated Rice ◽  
West African Sahel ◽  
African Sahel

scholarly journals Considerations on Armenian Political Elites, Diasporas and Armenian Economy in 1991-2019 Period

2021 ◽  
Author(s):  
Ersan Bocutoğlu
Keyword(s):  
Status Quo ◽  
Political Elites ◽  
Considerable Time ◽  
South Caucasus ◽  
The West ◽  
Mental Transformation ◽  
The Future ◽  
The Status ◽  
Short Run ◽  
Set Up

After the liberation of Dağlık Karabağ and close vicinity from the long-standing Armenian occupation by Azerbaijan in 2020, different scenarios concerning the future of Armenia and South Caucasus have come to fore. Therefore, there should be a realistic evaluation of status quo of Armenian political elites, diasporas and Armenian economy relations before taking into account of the scenarios. It is not difficult to estimate that since the realization of optimistic scenarios need a mental transformation of Armenian political elites and diasporas that takes considerable time, they are not likely to happen let alone in the short run but even in the medium run. The aim of this paper is to investigate the status quo of Armenian political elites, diasporas, and Armenian economy relations during 1991-2019 period so as to be able to set up a scientific base on which the evaluation of scenarios concerning the future of Armenia and South Caucasus is placed. The method adopted in the paper is a descriptive one and data are collected via internet. Paper suggests that the divergence of Armenian political elites and diasporas on fundamental issues such as Armenia-diaspora relations, Armenia-Russia relations, Armenia-the West Relations and Armenia-Turkey-Azerbaijan relations blackens not only the future of Armenia but also the future of South Caucasus.

A phytogeographic survey of Southern Benin

Bothalia ◽  
1983 ◽  
Vol 14 (3/4) ◽  
pp. 579-585 ◽  
Author(s):  
G. Paradis
Keyword(s):  
Fresh Water ◽  
Soil Characteristics ◽  
Deciduous Forests ◽  
Human Influence ◽  
The West ◽  
Rainfall Gradient ◽  
Floating Vegetation ◽  
Lophira Lanceolata ◽  
Southern Benin ◽  
Forest Islands

Southern Benin has a dry subequatoriai climate with a rainfall gradient from 850 mm in the west to 1 500 mm in the east, the geomorphology is varied and the vegetation has been subjected to strong human influence. There are numerous plant formations, namely: 1, forest islands which are probably relics of the primitive vegetation and include (a) dense semi-deciduous forests of several types, (b) swamp forests of two types, (c) periodically flooded forest of two types, (d) Lophira lanceolata  (Hutchinson Dalziel, 1954-72) woodlands and (e) mangrove swamps; 2, formations which are probably derived and include (a) thickets of several types, (b) tree savannas and shrub savannas, (c) grassy savannas and prairies varying according to soil characteristics and (d) halophytic grasslands; and 3, floating vegetation on fresh-water lakes.

A procedure for the quantification of total iodine by inductively coupled plasma mass spectrometry, and its application to the determination of iodine in algae sampled in the lagoon of Venice

2016 ◽  
Vol 8 (41) ◽  
pp. 7545-7551 ◽  
Author(s):  
D. Badocco ◽  
V. Di Marco ◽  
A. Piovan ◽  
R. Caniato ◽  
P. Pastore
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Lagoon Of Venice ◽  
Total Iodine ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Set Up

A new ICP-MS procedure was set up, and it was used to perform iodine biomonitoring in seaweeds growing in Venice.

scholarly journals Soil and plant communities development and ecological effectiveness of reclamation on a sand mine cast

2008 ◽  
Vol 54 (No. 12) ◽  
pp. 554-565 ◽  
Author(s):  
M. Pietrzykowski
Keyword(s):  
Plant Biomass ◽  
Terrestrial Ecosystem ◽  
Soil Characteristics ◽  
Carbon Accumulation ◽  
Nitrogen Accumulation ◽  
Ecosystem Development ◽  
Spontaneous Succession ◽  
Forest Reclamation ◽  
Set Up

The aim of the study was to assess terrestrial ecosystem development (mainly vegetation and soil characteristics) in the area of a sand mine cast (located in southern Poland) that has been either reclaimed or left for natural succession. A total of 20 sites in a chronosequence of 5, 17, 20 and 25 years were set up in two site categories: reclaimed and non-reclaimed sites. Selected properties of initial soils and features of vegetation were measured and they included carbon accumulation in soil; biomass and diversity of communities were also estimated. Next, based on carbon accumulation, the energy trapped in ecosystem components was estimated. Although the results of plant community investigation did not show the same distinct differences between site categories, the case study suggests that reclamation significantly accelerates ecosystem development. In comparison with spontaneous succession, the complete forest reclamation was found to increase the amount of carbon accumulation, thickness of humus horizon, and energy trapped in soil organic carbon and plant biomass in the developing ecosystem 2–3 times and nitrogen accumulation 5 times.

THE FITOACCUMULATION OF MOLYBDENUM AND MANGANESE IN ALSIKE CLOVER (TRIFOLIUM HYBRIDUM L.) AND GREATER PLANTAIN (PLANTAGO MAJOR L.)

2017 ◽  
pp. 81-88
Author(s):  
Małgorzata STOJEK
Keyword(s):  
Plant Species ◽  
Chemical Elements ◽  
Manganese Content ◽  
Individual Plant ◽  
Plantago Major ◽  
Icp Oes ◽  
Icp Ms ◽  
Menilite Shales

Studies of molybdenum and manganese content in topsoil and plants were carried out in the Beskidy Wschodnie (Carpathians) in area of occurrence of menilite shales and the Otryt sandstones. The aim of the study was to evaluate the content of ­molybdenum and manganese in plants and the determination of a bioaccumulation of these two chemical elements in two species of plants (­Trifolium hybridum L. and Plantago major L.). Mo symbols were performed by means of ICP-MS method, and Mn were analyzed by means of ICP-OES method. Result of studies in the Trifolium hybridum L. have shown higher content of Mo in the area of occurence of menilite shales (in leaves – 14 mg/kg) than in the Otryt sandstones (in leaves – 0.30 mg/kg). Most Mn accumulates in leaves (86–257 mg/kg). The bioaccumulate indicator of Mo in individual plant species is different and ranges from 0.13 to 1.13. The highest rate of ­bioaccumulation of molybdenum (1.13) can be observed in Trifolium hybridum L., which inhabits areas of menilite shales.

How grass contributes to controlling hillslope erosion

2020 ◽  
Author(s):  
Chengzhong Pan ◽  
Lan Ma
Keyword(s):  
Spatial Distribution ◽  
Soil Erosion ◽  
High Efficiency ◽  
Northern China ◽  
Bare Soil ◽  
Soil Characteristics ◽  
Vegetation Coverage ◽  
Grass Cover ◽  
Run Off ◽  
Set Up

<p>The aim of this study was to investigate how the spatial distribution of grass influenced run-off and erosion from a hillslope with loess and cinnamon soils in the rocky area of Northern China. We set up a trial to test the two soils with different treatments, including bare soil (BS), grass strips on the upper (UGS) and lower (DGS) parts of the slope, grass cover over the entire slope (GS), and a grass carpet on the lower part of the slope (GC), under simulated rainfall conditions. The results showed that the run-off coefficients for the loess and cinnamon soils decreased by between 4% and 20% and by between 2% and 37%, respectively, when covered with grass. Grass spatial distribution had little effect on the run-off, but more effect on erosion than vegetation coverage degree. The most effective location of grass cover for decreasing hillslope erosion was at the foot, and the high efficiency was mainly due to controlling of rill formation and sediment deposition. The soil loss from GS, DGS, and GC on the loess and cinnamon soils was between 77% and 93% less and 55% and 80% less, respectively, compared with the loss from BS. However, the soil characteristics had little effect on soil erosion for well-vegetated slopes. The results highlight the importance of vegetation re-establishment at the foot of hillslope in controlling soil erosion.</p>

scholarly journals Thermal Aspects of Safety Analysis for Shipment of West Valley Melter

2017 ◽  
Author(s):  
James E. Laurinat ◽  
Matthew R. Kesterson ◽  
Jeffery L. England ◽  
Edward T. Ketusky ◽  
Charles A. McKeel ◽  
...  
Keyword(s):  
National Laboratory ◽  
Safety Analysis ◽  
Department Of Energy ◽  
Savannah River ◽  
The West ◽  
Heating Source ◽  
Savannah River National Laboratory ◽  
Set Up ◽  
High Level ◽  
Cellular Concrete

The thermal aspects of a safety analysis for shipment of the West Valley melter are presented. The West Valley melter was used from 1996 to 2002 to vitrify regionally sourced high level radioactive waste. The U.S. Department of Energy (DOE) set up the West Valley Demonstration Project to encase this melter and grout it in low density cellular concrete, for disposal. DOE-West Valley requested the Savannah River National Laboratory to prepare a Safety Analysis Report. The thermal portion of the safety analysis covers Normal Conditions of Transport (NCT) and Hypothetical Accidents Conditions (HAC), as defined in the Code of Federal Regulations. For NCT, it is assumed that the encased melter is stored in either shade or direct sunlight at an ambient temperature of 311 K (100 °F). The defining HAC is exposure to a 1075 K (1475 °F) fire for 30 minutes. Finite element computer models were used to compute temperature profiles for NCT and HAC, given the thermal properties of the melter and its contents and tabulated radiolytic heating source concentrations. The resulting temperature conditions were used to estimate the pressurization due to evaporation of water from the concrete. The maximum calculated gauge pressures were determined to be 81 kPa (12 psig) for NCT and 580 kPa (84 psig) for HAC.

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