scholarly journals Acidic leaching of a Podzol Bf horizon from the Precambrian Shield, Ontario, Canada

1994 ◽  
Vol 74 (3) ◽  
pp. 321-333 ◽  
Author(s):  
Bruce LaZerte ◽  
Joe Findeis
Keyword(s):  
Key Words ◽  
Acid Treatment ◽  
Base Cations ◽  
Distilled Water ◽  
Precambrian Shield ◽  
Primary Minerals ◽  
Extractable Al ◽  
Acid Weathering

Illuviated mineral horizons (Bf) from a Podzol on the Precambrian Shield, Ontario, Canada were collected, placed in columns and treated with distilled water, cation amended water, acidified water or cation and acid amended water over a 4-mo period. While the cation treatment had little effect relative to the control, the acid treatment removed large quantities of Al, Si and base cations. The source of the leached Al was primarily (~ 70%) dithionite–citrate–bicarbonate (DCB) extractable Al, apparently some form of amorphous gibbsite. Organic Al (pyrophosphate extractable) contributed only about 20%. However, even more pronounced was a major within-column migration of oxalate extractable Al–Si, perhaps allophane or imogolite, which was leached from the top of the acidified columns and precipitated below. The weathering of primary minerals and possibly interlayer Al in vermiculite contributed little to the leaching of Al from the acidified columns. Key words: Acid, weathering, Podzol, aluminum, silica

EXTRACTION OF BORON FROM CSSC REFERENCE SOILS BY HOT WATER, DILUTE CaCl2 AND MANNITOL-CaCl2 SOLUTIONS

1986 ◽  
Vol 66 (2) ◽  
pp. 377-381 ◽  
Author(s):  
P. A. SCHUPPLI
Keyword(s):  
Key Words ◽  
Soil Samples ◽  
Water Soluble ◽  
Hot Water ◽  
Distilled Water ◽  
Background Color ◽  
Color Development ◽  
Reference Soil ◽  
Highly Correlated

Soils were extracted by hot water, dilute CaCl2, and by mannitol-CaCl2 solutions and boron was determined by either azomethine-H or the curcumin method. Results were strongly method dependent; in particular results by the simplest method, mannitol-CaCl2, were generally lower and not highly correlated (r = 0.64) with those by the recommended procedure. This procedure involves extraction with hot distilled H2O (2:1 solution:soil), centrifugation, filtration, color development with azomethine-H and correction for background color. Extractable boron values by this procedure ranged from 0.1 to 1.4 mg kg−1. Background color can be further reduced by the substitution of 0.02 M CaCl2 for distilled water. Key words: CSSC reference soil samples, hot-water-soluble boron

A SUB-TILL SAPROLITE AND THE OVERLYING SOIL PROFILE NEAR MOUNT ORFORD, SOUTHERN QUEBEC

1984 ◽  
Vol 64 (4) ◽  
pp. 577-585 ◽  
Author(s):  
C. R. DE KIMPE ◽  
M. R. LAVERDIÈRE ◽  
P. LASALLE
Keyword(s):  
Key Words ◽  
Clay Minerals ◽  
Soil Profile ◽  
Mineralogical Composition ◽  
Magnetic Mineral ◽  
Mineral Assemblages ◽  
Extractable Al

A saprolite deposit and the overlying soil profile developed in a glacial diamicton were sampled near Mount Orford, Southern Quebec. The two materials differed mainly by the magnetic mineral and extractable Al contents, by the Fedithionite/Feoxalate ratio and by the mineralogical composition. Illite and chlorite were the dominant clay minerals in the till whereas muscovite and kaolinite were the major minerals in the saprolite. A comparison was also made with another previously described saprolite deposit 4 km away from this one, in which chlorite was slightly transformed to smectite. It is suggested, from the mineral assemblages, that the two saprolites have probably formed at different times, the first one during Tertiary and the second one during an interglacial stage. Key words: Saprolite, glacial diamicton, kaolinite, muscovite, Tertiary alteration

Camptothecin accumulation in Camptotheca acuminata seedlings in response to acetylsalicylic acid treatment

2004 ◽  
Vol 84 (3) ◽  
pp. 885-889 ◽  
Author(s):  
Zhanhai Li ◽  
Zhijun Liu
Keyword(s):  
Acetylsalicylic Acid ◽  
Key Words ◽  
Acid Treatment ◽  
Hydroponic Culture ◽  
Camptotheca Acuminata ◽  
Plant Secondary Metabolite ◽  
Stunted Growth ◽  
Anti Cancer ◽  
Camptotheca Acuminata Seedlings ◽  
Potential Tool

Camptothecin is an anti-cancer alkaloid. Acetylsalicylic acid (ASA) treatment was evaluated as a potential tool for increasing camptothecin accumulation (concentration and yield) in Camptotheca acuminata. Increasing ASA concentration increased leaf camptothecin concentration, but stunted growth and decreased total leaf camptothecin yield. Thus, ASA treatment does not enhance camptothecin yield. Key words: Hydroponic culture, plant secondary metabolite

scholarly journals Formulation and Evaluation of Herbal Topical Gel Containing Leaves Extract of Andrographis paniculata

2020 ◽  
Vol 10 (1) ◽  
pp. 48-51
Author(s):  
Aney Joice Samuel ◽  
Nida Mulla
Keyword(s):  
Key Words ◽  
Propylene Glycol ◽  
Leaf Extract ◽  
Physical Appearance ◽  
Andrographis Paniculata ◽  
Distilled Water ◽  
Alcoholic Extract ◽  
Methyl Paraben ◽  
Propyl Paraben ◽  
Topical Gel

Objective: The present study has been undertaken with the aim to formulate and evaluate the gel contaning leaf extract of Andrographis Paniculata. Methodology and results: The formulation was designed by using alcoholic extract of leaves of Andrographis paniculata.The gel was prepared by using  carbapol 934, triethanolamine, propylene glycol, methyl paraben, propyl paraben and required amount of distilled water. The prepared gel was evaluated for physical appearance, pH, spread ability, viscosity, extrudability, albumin denaturation assay and stability. Conclusion: Carbopol gels with dried leaves extract of Andrographis paniculata could be prepared successfully. Key words: Topical gel,Kalmegh, Spreadability, Albumin denaturation

scholarly journals Effect of Harvesting Method and Calcium on Post Harvest Physiology of Tomato

1970 ◽  
Vol 7 ◽  
pp. 37-41 ◽  
Author(s):  
DR Bhattarai ◽  
DM Gautam
Keyword(s):  
Weight Loss ◽  
Key Words ◽  
Calcium Chloride ◽  
Ambient Condition ◽  
Distilled Water ◽  
Animal Science ◽  
Tomato Fruits ◽  
Research Journal ◽  
Harvesting Method ◽  
Chloride Treatment

An experiment was conducted in Institute of Agriculture and Animal Science, Rampur, Chitwanduring 2003 to find out the effect of harvesting method and calcium chloride treatment on postharvestphysiology of tomato. Tomato (Hybrid Gootya) fruits with stalk and without stalk wereharvested at breaker stage and dipped in distilled water and different concentrations of calciumchloride viz. 0.25%, 0.50%, 0.75% and 1% for fifteen minutes. Fruit were then air-dried andstored at ambient condition (24 ± 3°C and 70 ± 5 % RH). Among the tested treatments the leastcumulative physiological weight loss (12.14%) was exhibited by 1% calcium chloride. The shelflife of tomato fruits was significantly affected by harvesting method and calcium treatment.Tomato fruit harvested with stalk had higher shelf-life (15 days) as compared to those harvestedwithout stalk (12.93 days) irrespective to calcium chloride application. The maximum shelf lifewas noticed in 1% calcium chloride treated fruits (16.50 days) followed by 0.75% calciumchloride treated fruits (16.17 days).Key words: Calcium chloride; physiological weight loss; shell life; tomatoDOI: 10.3126/narj.v7i0.1864Nepal Agriculture Research Journal Vol.7 2006 pp.37-41

Effect of various antagonists on the Channa striatus fillet extract antinociception in mice

2005 ◽  
Vol 83 (7) ◽  
pp. 635-642 ◽  
Author(s):  
Z A Zakaria ◽  
M R Sulaiman ◽  
A M. Mat Jais ◽  
M N Somchit
Keyword(s):  
Key Words ◽  
Bioactive Compounds ◽  
Distilled Water ◽  
Receptor System ◽  
Writhing Test ◽  
Channa Striatus ◽  
Different Types ◽  
Serotonergic Receptor ◽  
Abdominal Constriction ◽  
Significant Concentration

The effects of an aqueous supernatant of haruan (ASH) (Channa striatus) fillet extract on various antinociception receptor system activities were examined using a mouse abdominal-constriction model. Mice that were pretreated with distilled water, s.c., followed 10 min later by administration of 25%, 50%, and 100% concentration ASH, s.c., produced a significant concentration-dependent antinociceptive activity (p < 0.001). Pretreatment with naloxone (0.3, 1.0, and 3.0 mg/kg body mass), 10 min before ASH administration, failed to block the extract antinociception. Pretreatment of the 100% concentration ASH with mecamylamine (5 mg/kg), pindolol (10 mg/kg), and haloperidol (1 mg/kg) also did not cause any significant change in its antinociception. However, pretreatment with atropine (5 mg/kg), bicuculline (10 mg/kg), phenoxybenzamine (10mg/kg), and methysergide (5 mg/kg) were found to reverse ASH antinociception. Based on the above findings, the ASH is suggested to contain different types of bioactive compounds that act synergistically on muscarinic, GABAA, α-adrenergic, and serotonergic receptor systems to produce the observed antinocicep tion. Key words: Haruan (Channa striatus), antinociceptive, writhing test, receptor systems

scholarly journals Effect of some Essential Oils on Seed Germination and Seedling Length of Parthenium hysterophorous L.

2009 ◽  
Vol 15 ◽  
pp. 69-73 ◽  
Author(s):  
V. R. Paudel ◽  
V.N. P. Gupta
Keyword(s):  
Seed Germination ◽  
Essential Oil ◽  
Essential Oils ◽  
Key Words ◽  
Distilled Water ◽  
Plant Essential Oils ◽  
Seedling Length ◽  
Noxious Weed ◽  
Filter Papers ◽  
Plant Sources

Effect of plant essential oils on seed germination and seedling growth of Parthenium hysterophorus was examined. Essential oils of Eucalyptus, Camphor, and Lemongrass were used in the experiments at different concentrations (0 to 20 ml.l-1). Water imbibed (36 h) seeds were germinated at 25°C ± 1 in petriplates containing 3 layers of filter papers soaked in distilled water and added with 1.5 ml of a given essential oil of particular concentration. Experiments were carried out taking three replicas. Observations were made at an interval of 24 h from the 4th day of incubation till 20th. All essential oils significantly (P < 0.05) reduced seed germination irrespective of their sources. Effects of plant sources were, however, not significant (P>0.05). Key words: Noxious weed, terpenes, sesquiterpenes, essential oil.   doi: 10.3126/eco.v15i0.1945 ECOPRINT 15: 69-73, 2008

The relative importance of oxalate and pyrophosphate extractable aluminum to the acidic leaching of aluminium in Podzol B horizons from the Precambrian Shield, Ontario, Canada

1995 ◽  
Vol 75 (1) ◽  
pp. 43-54 ◽  
Author(s):  
Bruce D. LaZerte ◽  
Joe Findeis
Keyword(s):  
Key Words ◽  
Acid Deposition ◽  
Relative Importance ◽  
Precambrian Shield ◽  
Soil Aluminum ◽  
Extractable Fraction ◽  
Key Words Aluminum

Four Bf and one Bhf Podzol horizon samples from the Precambrian Shield, Ontario, Canada were leached with pH 3 solutions in three different experiments to determine which soil aluminum fraction was primarily responsible for the aluminum leached into solution. For the Bf horizons, it was primarily the oxalate-extractable aluminum fraction (corrected for pyrophosphate, Alo–Alp); for the Bhf horizon it was equally the pyrophosphate (Alp) and Alo–Alp. A comparison with other studies suggests that when the ratio (Alo–Alp)/Alp is above 0.3–0.7, the oxalate-extractable fraction will be most important, and at lower ratios the pyrophosphate fraction becomes most important. The pattern of fluoride leaching in these experiments suggests that F was concentrated primarily on the surface of the amorphous aluminum fraction. Key words: Aluminum, silica, fluoride, Podzol, acid deposition

scholarly journals Treatment of neglected elbow dislocations with combination of speed V-Y muscleplasty and intra-articular injection of hydrocorticosone

1970 ◽  
Vol 8 (1) ◽  
pp. 91-94
Author(s):  
P Bansal ◽  
H Lal ◽  
R Khare ◽  
D Mittal
Keyword(s):  
Developing Countries ◽  
Medical Journal ◽  
Key Words ◽  
Performance Index ◽  
Case Series ◽  
Distilled Water ◽  
Index 2 ◽  
Mean Time ◽  
Time From Injury

Neglected dislocations of the elbow are not uncommon in developing countries. We report case series of 3 cases of neglected dislocations of elbow. All the three cases were treated by combination of Speeds procedure and intraarticular injection of 25mg of hydrocorticosone acetate in 5ml of distilled water. Mean time from injury was 5 months and mean follow-up was 10 months. According to Mayo Elbow Performance Index, 2 outcomes were excellent and 1 outcome was good. Key words: Dislocations; elbow; neglected. DOI: 10.3126/kumj.v8i1.3229 Kathmandu University Medical Journal (2010), Vol. 8, No. 1, Issue 29, 91-94

MICROBIAL PARTICIPATION IN IODIDE REMOVAL FROM SOLUTION BY ORGANIC SOILS

1989 ◽  
Vol 69 (1) ◽  
pp. 127-135 ◽  
Author(s):  
J. T. KOCH ◽  
D. B. RACHAR ◽  
B. D. KAY
Keyword(s):  
Gamma Irradiation ◽  
Key Words ◽  
Microbial Activity ◽  
Nuclear Fuel ◽  
Organic Soil ◽  
Organic Soils ◽  
Γ Radiation ◽  
Precambrian Shield ◽  
Biological Removal ◽  
Nuclear Fuel Waste

The migration of the long-lived nuclide 129I in the biosphere may be changed if the nuclide passes through an organic soil (organic soils often occur in topographical depressions where groundwater generally enters the biosphere). The reactivity of I and, hence, its transportability may be altered in organic soils by processes in which microorganisms participate. The aim of this study, therefore, was to test for microbial participation in these processes. Twelve samples of nine organic soils, varying widely in degree of humification and in parent vegetation, were used in this study and were collected mainly on the Precambrian Shield of Ontario. Experiments were conducted using glucose, thymol, and γ radiation (60Co) to stimulate or suppress microbial activity in the soils. The presence of glucose generally increased I− removal from solution whereas thymol depressed removal. Gamma irradiation of the soils decreased I− removal from solution in all samples, but 100 kGy terminated I− removal in only one sample. If the removal of I− from solution after exposing the soils to 100 kGy of γ radiation is termed nonbiological, the biological removal of I− from solution exceeded the non-biological in all samples but one. The natural I content of the soils was directly related to both the biologically and the nonbiologically mediated processes of I− removal from solution. We conclude that microorganisms play an important role in the processes of I− removal from solution in organic soils of the Precambrian Shield of Ontario. Key words: Nuclear fuel waste, 129I, groundwater, microorganisms, enzymes, mobility

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