Wether bioassay of annual pasture legumes. IV. The oestrogenic activity of annual medic pastures

1965 ◽  
Vol 16 (6) ◽  
pp. 927 ◽  
Author(s):  
CM Francis ◽  
AJ Millington
Keyword(s):  
Development Stage ◽  
Flowering Stage ◽  
Mature Leaves ◽  
Pasture Legumes ◽  
Burr Medic ◽  
Measurable Activity ◽  
Highly Correlated ◽  
Very High

The oestrogenic activity of seven medic pastures measured at the time of flowering , by wether bioassay was highly correlated with their coumestrol content. The most active varieties M. littoralis (Harbinger) and M. truncatula (Cyprus) produced wether teat length increases equivalent to those resulting from injection of 8 µg of stilboestrol daily. M. scutellata (snail medic) and M. polymorpha (common burr medic) had no measurable activity. Medic pastures had only low coumestrol contents in the pre-flowering stages. Dry annual medic swards had greater coumestrol contents than the green pastures. At the burr development stage most coumestrol is found in the mature leaves, with only relatively insignificant quantities in the stems and pods. In dry material, however, the stems and pods had very high coumestrol contents. A table is presented of the coumestrol content of representative medic species tested at the flowering stage.

scholarly journals PENGEMBANGAN MULTIMEDIA PREZI BERBASIS PROBLEM BASED LEARNING (PBL) PADA MATERI HUKUM-HUKUM DASAR KIMIA KELAS X IPA DI SMAN 1 BUKITTINGGI

2018 ◽  
Author(s):  
Dewi Putri Handayani ◽  
Rahadian Zainul ◽  
Fajriah Azra
Keyword(s):  
Data Analysis ◽  
Data Collection ◽  
Learning Process ◽  
Problem Based Learning ◽  
Development Stage ◽  
Chemistry Teacher ◽  
Basic Law ◽  
Chemistry Learning ◽  
High Level ◽  
Very High

Abstract— This research is aimed to produce a prezi multimedia based on Problem Based Learning (PBL) in Basic Law of Chemistry material and to determine the level ov validaty and practicality based on media’s function. This research is Researc and Development (R&D) which applies 4-D madel: define, design, develop, and disseminate. The research is done until development stage. Determining the level of validity and practicality are done by Chemistry lecturer, Chemistry teacher,and students of class XI IPA SMAN 1 Bukittinggi. The research instrument is questionnaire which consists of validity questionnaire and practicality questionnaire. The technic of data collection is done by distributing questionnaire. The data is analyzed by using moment kappa. From the data analysis,it is found that Prezi Multimedia based on Problem Based Learning (PBL) in Basic Law of Chemistry material has moment kappa validity about 0,85 with very high level of validity, moment kappa practicality from teacher’s evaluation about 0,86 with very high level of practicality, and moment kappa practicality from student’s evaluation about 0,80 with high level of practicality. The learning media that have been developed is proved valid and practical, so it can be used on Chemistry learning process in class X IPA at SMAN 1 Bukittinggi.

Manganese toxicity in Trifolium balansae, T. resupinatum, T. subterraneum, Medicago murex, M. polymorpha, M. sativa, Lotus pedunculatus, and Ornithopus compressus: relative tolerance and critical toxicity concentrations

1995 ◽  
Vol 35 (3) ◽  
pp. 367 ◽  
Author(s):  
DGDe Marco ◽  
CB Li ◽  
PJ Randall ◽  
Marco DG De
Keyword(s):  
Triticum Aestivum ◽  
Subterranean Clover ◽  
Pasture Legumes ◽  
Relative Tolerance ◽  
Ornithopus Compressus ◽  
Burr Medic ◽  
Lotus Pedunculatus ◽  
Persian Clover ◽  
High Concentrations ◽  
Mn Concentrations

This paper describes the tolerance to high concentrations of manganese (Mn) of pasture legumes that are suitable for the >500 mm rainfall zone in southern Australia. The legumes are lucerne (Medicago sativa), burr medic (M. polymorpha), murex medic (M. murex), balansa clover (Trifolium balansae), Persian clover (T. resupinatum), subterranean clover (T: subterraneum), greater lotus (Lotus pedunculatus), and seradella (Ornithopus compressus). Wheat (Triticum aestivum) cv. Egret and subterranean clover cvv. Mt Barker and Karridale were included to place the tolerance of the remaining species in the context of other studies.Symptoms of toxicity differed between species. Species ranking (in descending order) for Mn tolerance, and external threshold Mn concentrations (mmol/L), were subterranean clover (1.0), wheat (0.71), balansa clover (0.54), greater lotus (0.51), serradella (0.50), Persian clover (0.25), murex medic (0.24), burr medic (0.20), and lucerne (0.19). Critical toxicity concentrations derived from the relationships of yields to Mn concentrations in whole shoots for each species were as follows (mg Mn/kg DW): subterranean clover (2010), balansa clover (1330), serradella (1080), greater lotus (760), wheat (570), burr medic (440), murex medic (430), Persian clover (360), lucerne (190).

Regional differences in catecholamine concentrations in bovine ovaries analysed by high-performance liquid chromatography

1991 ◽  
Vol 129 (2) ◽  
pp. 221-226 ◽  
Author(s):  
P. A. Denning-Kendall ◽  
M. L. Wild ◽  
Wathes D. C.
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Molar Ratio ◽  
Corpora Lutea ◽  
Wet Weight ◽  
High Concentrations ◽  
Highly Correlated ◽  
Very High

ABSTRACT Bovine corpora lutea and ovarian stroma were analysed by high-performance liquid chromatography for catecholamine content. High concentrations (up to 102 nmol/g wet weight) were found in both 'central' stroma, containing many blood vessels, and 'peripheral' stroma. Central stroma contained noradrenaline and some dopamine, whereas peripheral stroma contained a higher proportion of dopamine and also significant amounts of 3,4-dihydroxyphenylacetic acid (DOPAC). Occasional samples of stroma had very high amounts of dopamine, suggesting that it is stored in specific regions. Corpora lutea, although devoid of direct innervation, contained dopamine (up to 5·3 nmol/g) and noradrenaline (up to 1·2 nmol/g). The average dopamine: noradrenaline molar ratio was 1·19 : 1 and the concentrations of dopamine and noradrenaline were highly correlated (P < 0·002). The concentration of dopamine was significantly higher in the early luteal phase of the oestrous cycle than during the rest of the cycle or in pregnancy. The levels of noradrenaline and dopamine present in corpora lutea are sufficient to modulate the production of both oxytocin and progesterone by luteal cells in vitro. Journal of Endocrinology (1991) 129, 221–226

The effect of sulphur on the growth, sulphur and nitrogen concentrations, and critical sulphur concentrations of some tropical and temperate pasture legumes

1977 ◽  
Vol 28 (5) ◽  
pp. 807 ◽  
Author(s):  
CS Andrew
Keyword(s):  
Growth Responses ◽  
Flowering Stage ◽  
Critical Concentrations ◽  
Pasture Legumes ◽  
Diagnostic Indices ◽  
Stylosanthes Humilis ◽  
Nitrogen Concentrations ◽  
Macroptilium Atropurpureum ◽  
Macroptilium Lathyroides ◽  
Pasture Legume

Seven tropical and five temperate pasture legume species were grown in pots of three sulphur-deficient soils with varying additions of sulphate. Growth responses and the chemical composition of the plant tops were recorded, and from the latter, tentative critical concentrations of sulphur were established. These were compared with data from two field sites (six species only). Critical concentrations of sulphur in the tops of species sampled at the immediate pre-flowering stage of growth were: Macroptilium lathyroides 0.17%, Macroptilium atropurpureum 0.15%, Desmodium intortum 0.17%, Desmodium uncinatum 0.17%, Stylosanthes humilis 0.14%, Lotononis bainesii 0.15%, Glycine wightii 0.17%, Trifolium repens 0.18%, Trifolium semipilosum 0.17%, Medicago sativa 0.20%, Medicago truncatula 0.20% and Medicago denticulata 0.20%. Sulphate concentration and nitrogen/sulphur ratios were investigated as alternative diagnostic indices, but were not considered as suitable as total sulphur indices for the assessment of sulphur deficiency in legumes. Nitrogen concentrations in the plant tops were increased by sulphate supply, and excellent correlations were established between the nitrogen and sulphur concentrations in the plant tops.

Long-term patterns of seed softening in some annual pasture legumes in a low rainfall environment

1992 ◽  
Vol 32 (3) ◽  
pp. 331 ◽  
Author(s):  
GB Taylor ◽  
MA Ewing
Keyword(s):  
Subterranean Clover ◽  
Soil Surface ◽  
Trifolium Subterraneum ◽  
Medicago Polymorpha ◽  
Pasture Legumes ◽  
Burr Medic ◽  
Growing Environment ◽  
Simulated Field ◽  
Favourable Environment

Annual rates of seed softening were determined from 4 lines of burr medic (Medicago polymorpha), 1 barrel medic (M. truncatula), and 1 subterranean clover (Trifolium subterraneum) grown at Merredin in the 1 year. Measurements were also made on one of the lines of burr medic grown in 2 other environments, Gnowangerup and Eneabba, in the same year. Burrs were placed on the soil surface at Merredin and the numbers of residual hard seeds determined each year for up to 5 years in this one environment. Patterns of softening of seeds from the same seed populations were also determined in a laboratory oven with a diurnal temperature fluctuation of 60/15�C. In the field, the softening rates of the 5 medics grown at Merredin were similar, averaging 21% of the original seeds each year for the first 4 years. Seeds of the burr medic grown in a more favourable environment at Eneabba were much slower to soften (averaging 14%); hence, hardseededness in these medics was influenced more by the growing environment than by genotype. More than half of the seeds of subterranean clover softened in the field over the first summer, with declining annual proportions thereafter. There were clear differences between the clover and medics in both pattern and rate of seed softening. The lower seed-softening rate of medics than of subterranean clover was more favourable for ley systems involving frequent cropping, especially in low rainfall areas. Treatment of seeds at 60/15�C simulated field softening for subterranean clover well but produced misleading results for the medics.

scholarly journals DEVELOPING INSTAGRAM FILTER-BASED ACCOUNTING EDUCATIONAL GAME AS A FUN LEARNING MEDIA

2020 ◽  
Vol 2 (2) ◽  
pp. 113-130
Author(s):  
Frandy Karundeng
Keyword(s):  
Learning Process ◽  
Development Stage ◽  
Educational Game ◽  
Accounting Students ◽  
Design Development ◽  
Photo Sharing ◽  
Accounting Courses ◽  
Analysis Design ◽  
Addie Model ◽  
Very High

The learning process in accounting courses often becomes boring and even intimidating for students because the material is often considered difficult or involves a lot of calculations that the learning situation becomes rigid and students cannot enjoy the learning process. For this reason, lecturers must prepare an alternative media for learning that is more interesting, for example by using games. The game in this research is based on the Instagram filter as most students have an Instagram account and spend a lot of time on that photo-sharing platform. The game was developed using the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). In the development stage, this game was validated by material expert and information technology expert, and was then implemented to 100 accounting students. Based on the evaluation results, this game was declared to be very feasible in terms of software, display, and learning design aspects. Moreover, this Instagram filter-based accounting educational game was declared a fun learning media for students, and was able to motivate students to study accounting as indicated by the average total score of 4.48 or "very high" for the learning motivation aspect.

Wether bioassay of annual pasture legumes. III. The oestrogenic potency of dry subterranean clover pastures, and of leaf blade and petiole in the green state

1965 ◽  
Vol 16 (1) ◽  
pp. 23 ◽  
Author(s):  
CM Francis ◽  
AJ Millington
Keyword(s):  
Leaf Blade ◽  
Subterranean Clover ◽  
Late Summer ◽  
Green Leaf ◽  
Green State ◽  
Pasture Legumes ◽  
Measurable Activity

Late summer pastures of nine strains of subterranean clover had very low oestrogenic activity as assessed by wether teat length bioassay. Only the Dwalganup variety had measurable activity which may have been due mainly to moderate levels of coumestrol in the various dry plant fractions. The activity of green leaf blade of the Yarloop strain was about nine times as great as that of the petioles. Possible agronomic implications of this finding are discussed.

Lead concentrations in tissues of fruit bats (Pteropus sp.) in urban and non-urban locations

1993 ◽  
Vol 20 (3) ◽  
pp. 315 ◽  
Author(s):  
B Hariono ◽  
J Ng ◽  
RH Sutton
Keyword(s):  
Environmental Exposure ◽  
Urban Areas ◽  
Fruit Bats ◽  
Short Term ◽  
Probable Source ◽  
High Concentrations ◽  
Highly Correlated ◽  
High Lead ◽  
Very High

Lead concentrations were measured in tissues from 37 fruit bats from the Brisbane area and 5 bats from non-urban areas. On the basis of toxicity levels of 25 ug per g of kidney and 10 ug per g of liver, 11 of the Brisbane bats had concentrations consistent with toxicity. Other Brisbane bats had very high lead concentrations in bone and teeth. The lead concentrations in the non-urban bats were very low. Lead concentrations in the fur were variable but were highly correlated with concentrations in bones and teeth, reflecting long-term exposure to lead. High concentrations of lead were recovered from fur washings, which correlated very highly with the concentrations in kidney and liver, reflecting more recent and continuing exposure to lead. The source of the lead was not verified but the atmosphere was the probable source. Measurement of lead concentrations in the fur and its washings would appear to provide a means of monitoring lead accumulation in the tissues of fruit bats over both the long and short term. Such measurements could be valuable in monitoring environmental exposure to lead.

Breeding systems and genetic variation in Amsinckia spectabilis (Boraginaceae)

1985 ◽  
Vol 63 (3) ◽  
pp. 533-538 ◽  
Author(s):  
Fred R. Ganders ◽  
Susan K. Denny ◽  
David Tsai
Keyword(s):  
Genetic Variation ◽  
Gel Electrophoresis ◽  
Allelic Variation ◽  
Outcrossing Rate ◽  
Breeding Systems ◽  
Rare Alleles ◽  
Mixed Populations ◽  
Highly Correlated ◽  
Allozyme Loci ◽  
Very High

Samples from 10 populations of Amsinckia spectabilis var. spectabilis and three populations of A. spectabilis var. microcarpa were analyzed for allelic variation at 17 allozyme loci using stareh gel electrophoresis. This species is a self-compatible annual which has heterostylous populations, homostylous populations, and mixed populations containing heterostylous and homostylous plants. Heterostylous populations had the highest outcrossing rates, homostylous populations the lowest, and mixed populations were intermediate in outcrossing rate. Outcrossing rate is highly correlated with the average stigma–anther separation in flowers in the populations. Genetic variability was highest in heterostylous populations, lowest in homostylous populations, and was intermediate in mixed populations, although one large homostylous population was as variable as were mixed populations. Genetic identities among populations were very high with the exception of the two northernmost, isolated homostylous populations which were fixed for rare alleles at some loci. In the rest of the populations, genetic identities were higher between populations of the same taxonomic variety than they were in intervarietal comparisons.

Critical concentrations of potassium in cotton (Gossypium hirsutum)

1992 ◽  
Vol 118 (1) ◽  
pp. 71-75 ◽  
Author(s):  
D. Singh ◽  
M. S. Brar ◽  
A. S. Brar
Keyword(s):  
Gossypium Hirsutum ◽  
Field Experiments ◽  
Relative Yield ◽  
Development Stage ◽  
Growth Stages ◽  
Flower Initiation ◽  
Flowering Stage ◽  
Plant Parts ◽  
The Third ◽  
Different Growth Stages

SUMMARYPotassium concentrations in various plant parts of cotton (Gossypium hirsutum L.) at different growth stages were determined in field experiments in Punjab, India, in 1987, for plots fertilized at sowing and flowering, and these were compared with the final seed cotton yield. The optimum time of sampling for predicting relative yield depends on the time of K fertilizer application: if applied at sowing, plants should be sampled before the peak flowering stage (70 days after sowing, DAS); if applied at flowering (50 DAS), plants should be sampled 90–115 DAS. Critical K concentrations (% K. in dry matter) in the plant parts measured at different growth stages were 3·26 in the petioles of the third leaf from the top at flower initiation; 0·69 and 0·90 in blades and petioles of a lower leaf (first or second healthy leaf from the bottom of plant) respectively, and 2·60 in the petioles of the third leaf (young, fully mature leaf from the top of the plant) at peak flowering stage; 0·85 in blades of the third leaf, 0·53 and 0·50 in blades and petioles of a lower leaf, respectively, at the boll development stage; 0·70 and 2·85 in blades and petioles of the third leaf and 0·68 in petioles of a lower leaf at boll opening stage.

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