scholarly journals First comprehensive study on total contents and hot water extractable fraction of selected elements in 19 medicinal plants from various locations in Nyamira County, Kenya

2017 ◽  
Vol 39 ◽  
pp. 54-61 ◽  
Author(s):  
Volker Nischwitz ◽  
Richard Mogwasi ◽  
Salim Zor ◽  
Zachary Getenga ◽  
David K. Kariuki ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Hot Water ◽  
Extractable Fraction ◽  
Water Extractable ◽  
Comprehensive Study

GC/MS Analysis of Organic Compounds in Hot Water-Extractable Fraction from Shenfu Coal

2007 ◽  
Vol 17 (3) ◽  
pp. 354-357 ◽  
Author(s):  
Bao-min LI ◽  
Cheng YUAN ◽  
Zhi-min ZONG ◽  
Jing-pei CAO ◽  
Guang-feng LIU ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Hot Water ◽  
Ms Analysis ◽  
Extractable Fraction ◽  
Water Extractable

Aggregate size distribution and stability of an oxisol under legume-based and pure grass pastures in the eastern Colombian savannas

Soil Research ◽  
1995 ◽  
Vol 33 (1) ◽  
pp. 153 ◽  
Author(s):  
AJ Gijsman ◽  
RJ Thomas
Keyword(s):  
Size Distribution ◽  
Soil Aggregates ◽  
Aggregate Stability ◽  
Aggregate Size ◽  
Soil Aggregate ◽  
Hot Water ◽  
Aggregate Size Distribution ◽  
Carbohydrate Concentration ◽  
Stability Measurement ◽  
Water Extractable

This study evaluated soil aggregate size distribution and stability of an Oxisol under improved grass-only or grass-legume pastures, established in previously native savanna. Three grass-legume combinations were included at various stocking rates. In all treatments and soil layers, soils were well aggregated, having more than 90% of their weight in macroaggregates (>250 �m). The addition of legumes to pastures did not affect the soil aggregate size distribution, although aggregates showed somewhat more stability against slaking. An increase in stocking rate negatively affected both average aggregate size and aggregate stability. Aggregates showed little or no dispersion of clay particles in any treatment. A positive correlation was found between wet aggregate stability and hot-water extractable carbohydrate concentration, supporting the hypothesis that these carbohydrates equate with plant-derived or microbial polysaccharides which glue soil aggregates together. It is suggested that determination of hot-water extractable carbohydrates may serve as a useful indicator of small differences in aggregate stability, even when these differences are not evident in the stability measurement itself.

Soil quality indicators as influenced by 5-year diversified and monoculture cropping systems

2020 ◽  
pp. 1-12
Author(s):  
H. Feng ◽  
G. O. Abagandura ◽  
S. Senturklu ◽  
D. G. Landblom ◽  
L. Lai ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Soil Quality ◽  
Quality Indicators ◽  
Soil Ph ◽  
Cropping Systems ◽  
Hot Water ◽  
Crop Diversity ◽  
Quality Data ◽  
Soil Quality Indicators ◽  
Water Extractable

Abstract Increasing crop diversity has been highly recommended because of its environmental and economic benefits. However, the impacts of crop diversity on soil properties are not well documented. Thus, the present study was conducted to assess the impacts of crop diversity on selected soil quality indicators. The cropping systems investigated here included wheat (Triticum aestivum L.) grown continuously for 5 years as mono-cropping (MC), and a 5-year cropping sequence [(wheat–cover crop (CC)–corn (Zea mays L.)–pea (Pisum sativum L.) and barley (Hordeum vulgare L.)–sunflower (Helianthus annuus L.)]. Each crop was present every year. This study was conducted in the northern Great Plains of North America, and soil quality data were collected for 2016 and 2017. Selected soil quality indicators that include: soil pH, organic carbon (SOC), cold water-extractable C (CWC) and N (CWN), hot water-extractable C (HWC) and N (HWN), microbial biomass carbon (MBC), bulk density (BD), water retention (SWR), wet soil aggregate stability (WAS), and urease and β-glucoside enzyme activity were measured after the completion of 5-year rotation cycle and the following year. Crop diversity did not affect soil pH, CWC, CWN, HWC, HWN and SWR. Cropping systems that contained CC increased SOC at shallow depths compared to the systems that did not have CC. Crop diversity increased WAS, MBC, and urease and β-glucoside enzyme activity compared with the MC. Comparison of electrical conductivity (EC) measured in this study to the baseline values at the research site prior to the establishment of treatments revealed that crop rotation decreased EC over time. Results indicate that crop diversity can improve soil quality, thus promoting sustainable agriculture.

Comparison of mehlich‐1 and mehlich‐3 extractable soil boron with hot‐water extractable boron

1992 ◽  
Vol 23 (1-2) ◽  
pp. 1-14 ◽  
Author(s):  
L.M. Shuman ◽  
V.A. Bandel ◽  
S.J. Donohue ◽  
R.A. Isaac ◽  
R.M. Lippert ◽  
...  
Keyword(s):  
Hot Water ◽  
Water Extractable ◽  
Extractable Soil

scholarly journals Evaluation of Traditional Indian Antidiabetic Medicinal Plants for Human Pancreatic Amylase Inhibitory EffectIn Vitro

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Sudha Ponnusamy ◽  
Remya Ravindran ◽  
Smita Zinjarde ◽  
Shobha Bhargava ◽  
Ameeta Ravi Kumar
Keyword(s):  
Medicinal Plants ◽  
Curcuma Longa ◽  
Hot Water ◽  
Phytochemical Analysis ◽  
Tribulus Terrestris ◽  
Pancreatic Amylase ◽  
Glucose Levels ◽  
Isopropanol Extract ◽  
Dependent Inhibition ◽  
Inhibitory Potential

Pancreaticα-amylase inhibitors offer an effective strategy to lower the levels of post prandial hyperglycemia via control of starch breakdown. Eleven Ayurvedic Indian medicinal plants with known hypoglycemic properties were subjected to sequential solvent extraction and tested forα-amylase inhibition, in order to assess and evaluate their inhibitory potential on pancreaticα-amylase. Analysis of 91 extracts, showed that 10 exhibited strong Human Pancreatic Amylase (HPA) inhibitory potential. Of these, 6 extracts showed concentration dependent inhibition withIC50values, namely, cold and hot water extracts fromFicus bengalensisbark (4.4 and 125 μgmL-1),Syzygium cuminiseeds (42.1 and 4.1 μgmL-1), isopropanol extracts ofCinnamomum verumleaves (1.0 μgmL-1) andCurcuma longarhizome (0.16 μgmL-1). The other 4 extracts exhibited concentration independent inhibition, namely, methanol extract ofBixa orellanaleaves (49 μgmL-1), isopropanol extract fromMurraya koenigiileaves (127 μgmL-1), acetone extracts fromC. longarhizome (7.4 μgmL-1) andTribulus terrestrisseeds (511 μgmL-1). Thus, the probable mechanism of action of the above fractions is due to their inhibitory action on HPA, thereby reducing the rate of starch hydrolysis leading to lowered glucose levels. Phytochemical analysis revealed the presence of alkaloids, proteins, tannins, cardiac glycosides, flavonoids, saponins and steroids as probable inhibitory compounds.

scholarly journals Properties of extracted Eucalyptus globulus kraft pulps

TAPPI Journal ◽  
2012 ◽  
Vol 11 (4) ◽  
pp. 47-55 ◽  
Author(s):  
G.V. DUARTE ◽  
J.A.F. GAMELAS ◽  
B.V. RAMARAO ◽  
T.E. AMIDON ◽  
P.J. FERREIRA
Keyword(s):  
Surface Energy ◽  
Eucalyptus Globulus ◽  
Chemical Structure ◽  
Hot Water ◽  
Water Extraction ◽  
Kraft Pulps ◽  
Hot Water Extraction ◽  
Extraction Step ◽  
Kraft Cooking ◽  
Comprehensive Study

This work was a comprehensive study of the properties of extracted Eucalyptus globulus kraft pulps. Five levels of hot water extraction were performed, each followed by kraft cooking to three different kappa numbers. As extraction took place, the hemicelluloses content of the kraft pulps was reduced from 21%-22% to 3%-4% and, conversely, the cellulose fraction increased from 73%-75% to 85%-90%. Fiber length decreased for all pulps and kink index increased greatly with extraction. The dispersive components of the surface energy for the control (unextracted) and extracted (120 min) kappa no. 15 kraft pulps, as determined by inverse gas chromatography, were found to be 30.8 and 34.9 mJ/m2, respectively. The acid-base properties of the pulp surface seemed to be enhanced by the inclusion of the hot-water extraction step. We discuss the surface energy properties in terms of the chemical structure of the pulps. In addition, we report on two models able to predict the mass removal and kappa number of pulps prepared from preextracted chips.

Sign in / Sign up

Export Citation Format

Share Document