The Sulphur Nutrition of Coconut

1977 ◽  
Vol 13 (3) ◽  
pp. 265-271 ◽  
Author(s):  
M. A. T. De Silva ◽  
Greta M. Anthonypillai ◽  
D. T. Mathes
Keyword(s):  
Response Curve ◽  
Total Yield ◽  
Sulphur Content ◽  
Initial Growth ◽  
Sulphur Nutrition ◽  
Sensitive Index ◽  
Dilution Effects

SUMMARYThe sulphur content in the sixth leaf from the apex of coconut palms was found to be the most sensitive index to sulphur treatments. Although the S concentration in this leaf correlated negatively with applied levels of S, the response curve was concave. Sulphur treatments increased the total yield of fruits and weight of copra, but decreased the weight of kernel per nut. The derived curve for yield versus S concentration in the tissue was C-shaped, attributed to growth dilution effects caused by enhanced initial growth following the restoration of a nutrient in minimum.

Effects and interaction of lucerne and subtropical legumes in a Sorghum almum pasture

1971 ◽  
Vol 11 (53) ◽  
pp. 651 ◽  
Author(s):  
JJ Yates ◽  
MJ Russelle ◽  
IF Fergus
Keyword(s):  
Total Yield ◽  
Soil Layer ◽  
Substantial Contribution ◽  
Initial Growth ◽  
Competitive Effects ◽  
Residual Nitrogen ◽  
Tropical Legumes ◽  
Second Year ◽  
Assessment Of Treatment Effects

An experiment was carried out at Lawes in south-east Queensland to examine the behaviour of subtropical legumes (mixture of Glycine wightii and Phaseolus atropurpureus), of lucerne, and of all three legumes together in a Sorghum almum pasture. Two grazing regimes were imposed, both averaging almost one beast an acre a year, but one involving longer breaks between grazings. A final year of common grazing was used to obtain a better assessment of treatment effects. There was no evidence of any difference in persistence between the Nunbank and Crooble cultivars of S. almum. Initial growth of legumes was poor due to strong competition from S. almum, but in the second year they made a substantial contribution to total yield of dry matter and nitrogen, and in the following two years they also increased significantly the yield of S. almum. In general the sub-tropical legumes yielded more than lucerne, and were also more effective in increasing S. almum yields. There were only minor effects on the nitrogen content of S. almum. Lucerne and subtropical legumes were strongly competitive when sown together, in that each yielded less and had a smaller effect on S. almum than in separate mixtures with the grass ; the effects of lucerne were particularly marked. These competitive effects were less pronounced with less frequent grazing. Soil nitrogen in the 0-12 inch soil layer declined during the first two years of the pasture but increased during the following two, the accumulation occurring mainly in the surface 3 inches of plots containing legumes. Over the total pasture phase (four years), there was a small nett loss of nitrogen from the 0-12 inch layer. Volunteer species associated with a follow-up crop of Sorghum vulgare showed positive responses to residual nitrogen from lucerne but no response to subtropical legumes. It is suggested that this was associated with a slower turnover of nitrogen from lucerne root systems. There was no response in the crop itself.

MEFLUIDIDE EFFECTS ON YIELD AND QUALITY OF SMOOTH BROMEGRASS

1989 ◽  
Vol 69 (3) ◽  
pp. 823-832 ◽  
Author(s):  
V. S. BARON ◽  
G. A. VAN ESBROECK ◽  
A. C. DICK
Keyword(s):  
Total Yield ◽  
Forage Quality ◽  
Neutral Detergent Fiber ◽  
Growth Stages ◽  
Initial Growth ◽  
Smooth Bromegrass ◽  
Yield Distribution ◽  
Yield And Quality ◽  
Almost All

Smooth bromegrass (Bromus inermis Leyss.) pastures are characterized by poor seasonal yield distribution and low animal productivity during the late season. The plant growth regulator mefluidide (N-[2,4-dimethyl-5[[(trifluoromethyl)sulfonyl]amino]phenyl]acetamide) was applied to smooth bromegrass prior to jointing at 0 (Control), 0.15 (Low) and 0.30 (High) kg ha−1 to effect yield redistribution and improve forage quality in a three-cut system (preboot, cut 2 and cut 3) and in initial stages of growth at preboot, anthesis and hard dough stages. Almost all differences, due to mefluidide treatment, were confined to stages of accumulated growth and to cut 2 of the three-cut regime. Yield distribution was improved over years for both High and Low treatments compared to the Control as a result of decreased preboot and increased cut 2 yields. Total yield for the three cuts was 88% and 83% of the Control for Low and High treatments, respectively. Yield was reduced to 32, 66 and 85% of the Control by the High treatment at preboot, anthesis and hard dough stages of initial growth. Forage quality was generally improved uniformly over stages of initial growth, where leaf to stem ratio increased. Crude protein and in vitro organic matter disappearance (IVOMD) increased, while neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin and cellulose decreased over initial growth stages. IVOMD, NDF, ADF and cellulose increased at cut 2; lignin decreased at cut 3. Mefluidide effectively modified yield distribution in smooth bromegrass, but whether the improvements in forage quality shown through chemical analyses follow through to animal performance must be studied further.Key words: Bromegrass (smooth), mefluidide, yield distribution, forage quality

scholarly journals EFFECT OF PRIMING ON GERMINATION AND INITIAL GROWTH OF MELON PLANTS UNDER SALT STRESS

2017 ◽  
Vol 16 (2) ◽  
pp. 7-16
Author(s):  
J. L. CASTAÑARES ◽  
C. A. BOUZO
Keyword(s):  
Salt Stress ◽  
Chlorophyll Content ◽  
Nutrient Solution ◽  
Response Curve ◽  
Growth Parameters ◽  
Germination Percentage ◽  
Initial Growth ◽  
Osmotic Agents ◽  
Saline Medium

The objective of this work was to evaluate the effect of different osmotic agents and priming durations on the germination and initial growth of melon in salinity. The osmotic agents were NaCl and CaCl 2 and durations 2 and 4 days. First a response curve of germination to salinity was made. After priming the seeds were placed to germinate in a saline medium (14 dS m -1 ). The germination percentage was determined. The two treatments with the best results (NaCl and CaCl 2 2 days in both salts) were selected to evaluate the initial growth of the plants in salinity. It was sown in pots, irrigated with nutrient solution and 60 mM NaCl. The germination was reduced to 50% with 14 dS m -1 and inhibited with 22 dS m -1 . The best germination was achieved with NaCl and CaCl 2 2 days with 99 and 94% respectively. Both treatments showed an increase in growth parameters and chlorophyll content.

Epitaxial growth manner and structure of superconducting oxide films

1990 ◽  
Vol 48 (4) ◽  
pp. 2-3
Author(s):  
Yoshichika Bando ◽  
Takahito Terashima ◽  
Kenji Iijima ◽  
Kazunuki Yamamoto ◽  
Kazuto Hirata ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Film Surface ◽  
High Energy ◽  
Epitaxial Films ◽  
Layer By Layer ◽  
Initial Growth ◽  
In Situ Growth ◽  
High Quality ◽  
Activated Reactive Evaporation

The high quality thin films of high-Tc superconducting oxide are necessary for elucidating the superconducting mechanism and for device application. The recent trend in the preparation of high-Tc films has been toward “in-situ” growth of the superconducting phase at relatively low temperatures. The purpose of “in-situ” growth is to attain surface smoothness suitable for fabricating film devices but also to obtain high quality film. We present the investigation on the initial growth manner of YBCO by in-situ reflective high energy electron diffraction (RHEED) technique and on the structural and superconducting properties of the resulting ultrathin films below 100Å. The epitaxial films have been grown on (100) plane of MgO and SrTiO, heated below 650°C by activated reactive evaporation. The in-situ RHEED observation and the intensity measurement was carried out during deposition of YBCO on the substrate at 650°C. The deposition rate was 0.8Å/s. Fig. 1 shows the RHEED patterns at every stage of deposition of YBCO on MgO(100). All the patterns exhibit the sharp streaks, indicating that the film surface is atomically smooth and the growth manner is layer-by-layer.

Nucleation and initial growth of Pd2Si crystals on Si(111)

1993 ◽  
Vol 51 ◽  
pp. 844-845
Author(s):  
Xianghong Tong ◽  
Oliver Pohland ◽  
J. Murray Gibson
Keyword(s):  
High Vacuum ◽  
Dark Field ◽  
Ultra High Vacuum ◽  
Initial Growth ◽  
Surface And Interface ◽  
Dark Field Imaging ◽  
Transmission Electron ◽  
Initial Stage ◽  
Effect Of Surface

The nucleation and initial stage of Pd2Si crystals on Si(111) surface is studied in situ using an Ultra-High Vacuum (UHV) Transmission Electron Microscope (TEM). A modified JEOL 200CX TEM is used for the study. The Si(111) sample is prepared by chemical thinning and is cleaned inside the UHV chamber with base pressure of 1x10−9 τ. A Pd film of 20 Å thick is deposited on to the Si(111) sample in situ using a built-in mini evaporator. This room temperature deposited Pd film is thermally annealed subsequently to form Pd2Si crystals. Surface sensitive dark field imaging is used for the study to reveal the effect of surface and interface steps.The initial growth of the Pd2Si has three stages: nucleation, growth of the nuclei and coalescence of the nuclei. Our experiments shows that the nucleation of the Pd2Si crystal occurs randomly and almost instantaneously on the terraces upon thermal annealing or electron irradiation.

Demonstration and Quantitation of Pharmacological Inhibition of Pulmonary Uptake of N-lsopropyl-123l-p-lodoamphetamine by Propranolol

1989 ◽  
Vol 28 (03) ◽  
pp. 100-104 ◽  
Author(s):  
S. F. Akber
Keyword(s):  
Binding Sites ◽  
Bolus Injection ◽  
Cell Function ◽  
Lung Pathology ◽  
Lung Uptake ◽  
Pharmacological Inhibition ◽  
Sensitive Index ◽  
Pulmonary Uptake ◽  
First Pass

The first-pass pulmonary extraction values of N-lsopropyl-123l-p-lodoamphetamine (123I-IMP) in pretreated dogs decreases from 90 to 62% as the amount of propranolol increases from 0 to 20 mg. The first-pass pulmonary extraction values of 123I-IMP in dogs with a simultaneous bolus injection of propranolol decreases from 90 to 62% as the amount of propranolol increases from 0 to 10 mg. The pulmonary extraction of 123I-IMP with a simultaneous bolus injection of ketamine and 123I-IMP decreases from 90 to 64% as the ketamine dose increases from 0 to 100 mg. These results suggest that the pulmonary uptake of 123I-IMP may be at least partially mediated by receptors. They also indicate that endothelial metabolic cell function may be a useful index of early lung pathology. Furthermore, studies of the degree of lung uptake may be a sensitive index of pathologic states in which alterations of amine binding sites have occurred.

Factor VII Clotting Assay: Influence of Different Thromboplastins and Factor VII-Deficient Plasmas

1991 ◽  
Vol 65 (02) ◽  
pp. 160-164 ◽  
Author(s):  
Marina Poggio ◽  
Armando Tripodi ◽  
Guglielmo Mariani ◽  
Pier Mannuccio Mannucci ◽  
Keyword(s):  
Heart Disease ◽  
Ischemic Heart Disease ◽  
Dose Response ◽  
Response Curve ◽  
Ischemic Heart ◽  
Factor Vii ◽  
Response Curves ◽  
Assay Sensitivity ◽  
Clinical Laboratories ◽  
Coagulant Activity

SummaryBeing a putative predictor of ischemic heart disease, the measurement of factor VII (FVTI) coagulant activity will be presumably requested to clinical laboratories with increasing frequency. To assess the influence on FVII assays of different thromboplastins and FVII-deficient plasmas we compared performances of all possible combinations of 5 thromboplastins and 6 deficient plasmas. The reproducibility of the clotting times of the dose-response curves for human and rabbit thromboplastins were acceptable (CV lower than 7%), whereas bovine thromboplastin had a higher CV. Reproducibility was very similar for all deficient plasmas when they were used in combination with a given thromboplastin. Responsiveness of the dose-response curve did not depend on the deficient plasma but rather on the thromboplastin: one rabbit thromboplastin was the least responsive, the bovine thromboplastin the most responsive, the human and the remaining two rabbit thromboplastins had intermediate responsiveness. Assay sensitivity to cold-activated FVII varied according to the thromboplastin: the bovine thromboplastin was the most sensitive, the human thromboplastin the least sensitive, of the three rabbit thromboplastins two were relatively sensitive, one was almost insensitive. In conclusion, our results indicate that thromboplastin rather than deficient plasma is the crucial factor in the standardization of FVII assay.

Synchronized Inhibition of the Phospholipid Mediated Autoactivation of Factor XII in Plasma by β2-glycoprotein I and Anti-β2-glycoprotein I

1995 ◽  
Vol 73 (05) ◽  
pp. 798-804 ◽  
Author(s):  
Inger Schousboe ◽  
Margit Søe Rasmussen
Keyword(s):  
Lupus Erythematosus ◽  
Lupus Anticoagulant ◽  
Response Curve ◽  
Inhibitory Effect ◽  
Factor Xii ◽  
High Antibody ◽  
Contact Activation ◽  
Maximal Inhibition ◽  
Lupus Anticoagulants ◽  
Glycoprotein I

SummaryLupus anticoagulants are a group of antibodies commonly found in patients with autoimmune diseases such as systemic lupus erythematosus. Lupus anticoagulants inhibit phospholipid dependent coagulation and may bind to negatively charged phospholipids. Recent studies have suggested an association between anti-β2-glycoprotein I and a lupus anticoagulant, whose activity is frequently dependent on the presence of β2-glycoprotein I. Based on these observations, the effect of anti-β2-glycoprotein I on the autoactivation of factor XII in plasma was investigated. Autoactivation initiated by the presence of negatively charged phospholipids, but not by sulfatide, was strongly inhibited by immunoaffinity purified anti-β2-glycoprotein I. The dose-response curve of anti-β2-gly coprotein I was identical with that of a precipitating antibody, showing no inhibition at low and high antibody dilutions and maximal inhibition at an intermediate dilution. At high antibody concentrations, an increased rate of factor Xlla activation was observed. This increase was of the same magnitude as the decreased rate observed in plasma supplemented with the same amount of β2-glycoprotein I as in the plasma itself. This confirms the inhibitory effect of β2-GP-I on the contact activation and shows that inhibition is effective on the autoactivation of factor XII in plasma. The inhibitory action of β2-glycoprotein I was independent of the inhibition caused by the anti- β2-glycoprotein I/β2-glycoprotein I complex suggesting a synchronized inhibition of factor XII autoactivation by β2-glycoprotein I and anti-β2-gly coprotein I. The inhibition caused by the antibody is suggested to be caused by a reduced availability of negatively charged phospholipids due to the binding of the anti-β2- GP-I/β2-GP-I complex. This complex may be a lupus anticoagulant.

Sign in / Sign up

Export Citation Format

Share Document