Determination of As species distribution and variation with time in extracted groundwater samples by on-site species separation method

2021 ◽  
pp. 151913
Author(s):  
Danyang Tao ◽  
Changzhi Shi ◽  
Wei Guo ◽  
Yamin Deng ◽  
Yue'e Peng ◽  
...  
Keyword(s):  
Species Distribution ◽  
Separation Method ◽  
As Species ◽  
Groundwater Samples ◽  
Species Separation

Measurement and analysis of species distribution in laser-induced ablation plasma of an aluminum-magnesium alloy

2021 ◽  
Author(s):  
Junxiao Wang ◽  
Shuqing Wang ◽  
Lei Zhang ◽  
Maogen Su ◽  
Duixiong Sun ◽  
...  
Keyword(s):  
Species Distribution ◽  
Laser Energy ◽  
Integral Intensity ◽  
Spectral Lines ◽  
Imaging Method ◽  
Measurement And Analysis ◽  
Ablation Plasma ◽  
Spatio Temporal ◽  
Differential Imaging

Abstract We proposed a theoretical spatio-temporal imaging method, which was based on the thermal model of laser ablation and the two-dimensional axisymmetric multi-species hydrodynamics model. By using the intensity formula, the integral intensity of spectral lines could be calculated and the corresponding images of intensity distribution could be drawn. Through further image processing such as normalization, determination of minimum intensity, combination and color filtering, a relatively clear species distribution image in the plasma could be obtained. Using the above method, we simulated the plasma ablated from Al-Mg alloy by different laser energies under 1 atm argon, and obtained the theoretical spatio-temporal distributions of Mg I, Mg II, Al I, Al II and Ar I species, which are almost consistent with the experimental results by differential imaging. Compared with the experimental decay time constants, the consistency is higher at low laser energy, indicating that our theoretical model is more suitable for the plasma dominated by laser-supported combustion wave.

scholarly journals GENOME SIZE DETERMINATION OF CUCUMBER (CUCUMIS SATIVUS), HONEYDEW (CUCUMIS MELO INODORUS) AND ROCK MELON (CUCUMIS MELO CANTALUPENSIS) VIA FLOW CYTOMETRY

2021 ◽  
Vol 5 (1) ◽  
pp. 14-16
Author(s):  
Raden Muhamad Imaduddin Yumni ◽  
Mohd Fauzihan Karim ◽  
Mohd Razik Midin
Keyword(s):  
Flow Cytometry ◽  
Genome Size ◽  
Cucumis Melo ◽  
As Species ◽  
External Reference ◽  
The Family ◽  
Cucumis Species ◽  
Fcm Analysis ◽  
Interspecific And Intraspecific Variation

The family of Cucurbitaceae consists of species with economical and nutritional value. Morphologically, there are only few differences between Cucumis species. The interspecific and intraspecific variation in the genome size of the Cucumis species are not discovered yet. Due to this, this study aims to determine the genome size of C. sativus, C. melo inodorus and C. melo cantalupensis using flow cytometry (FCM) method. Nuclei suspension of selected Cucumis species were extracted using LBO1 lysis buffer by manual chopping technique and stained by propidium iodide priot to FCM analysis. Genome size of C. sativus, C. melo inodorus (Honeydew) and C. melo cantalupensis (Rockmelon) were determined by using Glycine max (Soybean) as an external reference standard (2C = 2.5 pg). This study found that the genome size of C. sativus, C. melo inodorus and C. melo cantalupensis estimated to be 2.83 pg, 3.00 pg and 3.47 pg respectively. The genome size data obtained from this study can be used in future genome studies as well as species characterization.

DETERMINATION OF BOTANICAL COMPOSITION OF TWO-COMPONENT FORAGE MIXTURES

1960 ◽  
Vol 40 (2) ◽  
pp. 225-234 ◽  
Author(s):  
J. W. Tanner ◽  
E. E. Gamble ◽  
W. E. Tossell
Keyword(s):  
Unit Cost ◽  
Estimation Method ◽  
Separation Method ◽  
Botanical Composition ◽  
Visual Estimation ◽  
Two Component ◽  
Late Maturity ◽  
The Difference ◽  
Forage Mixtures

A comparative study was made in 1958 of the visual estimation and hand separation methods of determining botanical composition of two-component forage mixtures. The results indicated that there were positive significant correlations between the per cent legume values obtained by the two methods. The visual estimation method was less variable than the hand separation method and the precision per unit cost was greater. The differences between per cent legume values obtained by the two methods were influenced by the stage of maturity (medium or late hay) of the components and the cut (hay or aftermath). In this study, the difference was significant only in the medium aftermath cut.Individually, three observers showed some inconsistencies between estimates on the medium and late maturity groups and between the hay and aftermath cut. However, by averaging the three estimates to obtain a mean sample, these inconsistencies were minimized.Both methods were more precise in the aftermath pasture cut than in the hay. An additional observer increased precision of the visual estimate more than an additional replicate or sample. The greater precision resulting from additional replicates, samples, or observers increased at a decreasing rate. The number of replicates, samples, and observers required for specific degrees of precision and a specific cost were calculated.The experiment showed that the visual estimation method can be superior to the hand separation method as a means of determining botanical composition.

Simultaneous determination of PAHS, nitro-PAHS and quinones in surface and groundwater samples using SDME/GC-MS

2017 ◽  
Vol 133 ◽  
pp. 431-440 ◽  
Author(s):  
Leila O. Santos ◽  
Jeancarlo P. dos Anjos ◽  
Sérgio L.C. Ferreira ◽  
Jailson B. de Andrade
Keyword(s):  
Simultaneous Determination ◽  
Groundwater Samples ◽  
Surface And Groundwater

scholarly journals Statistical Study on Physicochemical Characteristics of Groundwater in and around Namakkal, Tamilnadu, India

2009 ◽  
Vol 6 (3) ◽  
pp. 909-914 ◽  
Author(s):  
K. Karunakaran ◽  
P. Thamilarasu ◽  
R. Sharmila
Keyword(s):  
Suspended Solids ◽  
Statistical Study ◽  
Total Suspended Solids ◽  
Physicochemical Characteristics ◽  
Total Dissolved Solids ◽  
Sodium Potassium ◽  
Groundwater Samples ◽  
The Town

Groundwater samples collected at different locations in and around Namakkal were analyzed for their physicochemical characteristics. Ten locations of groundwater samples were collected and studied for every two month for the period June-2007 to December-2007. The present investigation is focused on the determination of physicochemical parameters such as temperature, taste, turbidity, electrical conductivity, pH, hardness, total solids, total dissolved solids, total suspended solids, chlorides, sulphate, nitrate, fluorides, dissolved oxygen, sodium, potassium andE.colibacterium. Groundwater suitability for domestic and irrigation purposes was examined by using WHO and BIS standards, which indicate the groundwater in a few areas, were not much suitable for domestic and agriculture purposes. Thus the objective of this study is to identify the quality of groundwater especially in the town and near by town where groundwater is used for domestic and agriculture purposes is discussed.

Sign in / Sign up

Export Citation Format

Share Document