Ram mating performance in Border Leicesters and related breed types. 2. Comparison of the performance of rams that were sexually active and inactive in pen tests

1985 ◽  
Vol 25 (1) ◽  
pp. 17 ◽  
Author(s):  
RJ Kilgour ◽  
SA Barwick ◽  
DG Fowler
Keyword(s):  
Direct Observation ◽  
Sexually Active ◽  
Mating Performance ◽  
Related Breed

The mating performances of 15 rams which were initially sexually inactive were examined by allowing them constant exposure to three oestrous ewes per day. Two rams did not mount or serve any ewes in 17 days of exposure. When the 13 remaining rams began to raddle ewes their mating performance was compared with that of active rams. Active and inactive rams raddled and inseminated similar numbers of oestrous ewes, suggesting that inactive rams are adequate performers at loads of three oestrous ewes per day once they commence mating. Over a total of 12 h direct observation, however, inactive rams performed significantly fewer mounts and serves than active rams.

Ram mating performance in Border Leicesters and related breed types. 1. Pen test performance and measures of testis diameter

1985 ◽  
Vol 25 (1) ◽  
pp. 9 ◽  
Author(s):  
SA Barwick ◽  
RJ Kilgour ◽  
AC Gleeson
Keyword(s):  
Sexual Activity ◽  
Test Performance ◽  
High Fertility ◽  
Sexually Active ◽  
Breed Type ◽  
The Mean ◽  
Mating Tests ◽  
Mating Performance ◽  
Related Breed

Sexual activity, serving capacity, mean number of mounts per serve and mean testis diameter were measured in 286 Border Leicester, BLI (a 'high fertility' sheep related to the Border Leicester) and BLI x Border Leicester rams at 1.5, 2.5 or 3.5 years of age. Rams were allowed two 20-minute introductory periods with spayed oestrous ewes, and then were given two 1-h pen mating tests during which their serving capacity (the mean number of serves in the two tests) and mounts per serve were counted. Rams which commenced mounting in introductory or 1-h tests were classed as sexually active. Among 1-5 and 2.5-year-old rams, 68.9 and 65.4%, respectively, were sexually active, while all 3.5-year-old rams were active. Mean testis diameters for inactive rams were smaller (P<0.05) than for active rams in both 1.5- and 2.5-year-old rams. There were breed type differences in activity, serving capacity and mean testis diameter at 1.5 years of age, but not at other ages. BLIs were less active at 1.5 years than other types, but BLIs and Border Leicesters did not differ in either their serving capacity or testis diameter. BLI x Border Leicesters generally had greater (P<0.05) serving capacities and testis diameters than other types, suggesting possible advantages for these rams at early joinings. Sire effects for serving capacity were not significant, but were significant (P<0.05) for mounts per serve, and for testis diameter at 1.5 years old. Activity status was highly repeatable (0.83) between 1.5 and 2.5 years and testis diameter was moderately repeatable (0.41). Repeatabilities for serving capacity and mounts per serve, in active rams, were not significant. Correlations between serving capacity and testis diameter were not significant for active rams, while serving capacity and mounts per serve were generally negatively related. Mean testis diameter was significantly (P<0.05) correlated with liveweight at 1.5 years but not at other ages. Liveweight at 2.5 years was positively (P<0.05) related to mounts per serve and negatively (P<0.05) related to serving capacity.

scholarly journals Effect of Hydroalcoholic Extract ofCydonia oblongaMiller (Quince) on Sexual Behaviour of Wistar Rats

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Muhammad Aslam ◽  
Ali Akbar Sial
Keyword(s):  
Body Weight ◽  
Single Dose ◽  
Sexual Behaviour ◽  
Wistar Rats ◽  
Sexually Active ◽  
Cydonia Oblonga ◽  
Hydroalcoholic Extract ◽  
Male Wistar Rats ◽  
Mating Performance ◽  
Remarkable Manner

Cydonia oblongaMiller (quince) is regarded as a potent libido invigorator in Tib-e-Nabvi and Unani System of Medicine. This study was carried out to evaluate the aphrodisiac activity of the hydroalcoholic extract of the fruits ofCydonia oblongaMiller (quince) in Wistar rats. The extract was administered orally by gavage in the dose of 500 mg/kg and 800 mg/kg body weight per day as a single dose for 28 days. The observed parameters were mounting frequency, assessment of mating performance, and orientation activities towards females, towards the environment, and towards self. The results showed that after administration of the extract mounting frequency and the mating performance of the rats increased highly significantlyP<0.01. The extract also influenced the behaviour of treated animals in comparison to nontreated rats in a remarkable manner, making them more attracted to females. These effects were observed in sexually active male Wistar rats.

Ram mating performance in Border Leicesters and related breed types. 3. Relationships of ram serving capacity, testis diameter, liveweight, breed and age with flock fertility

1989 ◽  
Vol 29 (1) ◽  
pp. 17 ◽  
Author(s):  
SA Barwick ◽  
RJ Kilgour ◽  
DG Fowler ◽  
JF Wilkins ◽  
WR Harvey
Keyword(s):  
Pregnancy Rate ◽  
Testicular Tissue ◽  
Interaction Effects ◽  
The Other ◽  
Mating Performance ◽  
Related Breed

Relationships of ram serving capacity (a measure of serving frequency in pen tests), testis diameter, liveweight, breed and age with flock fertility were studied in 40 rams joined individually for 7 days at high ewe:ram ratios. Rams were either Border Leicester, BLI (a high prolificacy line derived from the Border Leicester and Merino and since released as the Glen Vale breed) or BLI x Border Leicester, and aged either 1.5 or 2.5 years. Joinings were over 2 periods, 2-9 April or 16-23 April. Breed, age, period and interaction effects were also examined. On average (± s.e.), the number of ewes with mating marks in 7 days increased by 2.03 ± 0.52 ( P < 0.001) per serve per hour of serving capacity and by 0.40 ± 0.18 ( P < 0.05) per kg liveweight. Relationships with pregnancy rate in marked ewes differed between classes of rams. Larger testes were of most benefit when rams were of high serving capacity ( P < 0.0 1 ) or low liveweight (P<0.01). Only serving capacity was related to number of ewes pregnant, the number increasing by an average (± s.e.) of 1.73 ± 0.57 ewes per serve per hour (P<0.01). This suggests that a ram's capacity for more frequent service was more important to fertility than was extra testicular tissue. BLI x Border Leicester, BLI, and 2.5-year-old Border Leicester rams impregnated 30-40% more ewes than did 1.5-year-old Border Leicester rams. We estimate that the 1.5-year-old Border Leicester rams could be satisfactorily joined to about 46 ewes and the other rams to about 60 ewes.

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

Application of a Simple Cold Stub to the Direct Observation of Frozen Hydrated Sand

1973 ◽  
Vol 31 ◽  
pp. 212-213
Author(s):  
John M. Wehrung ◽  
Richard J. Harniman
Keyword(s):  
United States ◽  
Surface Water ◽  
Direct Observation ◽  
Controlled Study ◽  
Clay Particles ◽  
Organic Debris ◽  
Rock Formations ◽  
Water Tables ◽  
Permeable Rock ◽  
Natural Means

Water tables in aquifer regions of the southwest United States are dropping off at a rate which is greater than can be replaced by natural means. It is estimated that by 1985 wells will run dry in this region unless adequate artificial recharging can be accomplished. Recharging with surface water is limited by the plugging of permeable rock formations underground by clay particles and organic debris.A controlled study was initiated in which sand grains were used as the rock formation and water with known clay concentrations as the recharge media. The plugging mechanism was investigated by direct observation in the SEM of frozen hydrated sand samples from selected depths.

Direct Observation of the Diffusionless β → β + ω Transformation in Titanium Alloys

1971 ◽  
Vol 29 ◽  
pp. 122-123
Author(s):  
N. E. Paton ◽  
D. de Fontaine ◽  
J. C. Williams
Keyword(s):  
Electron Microscope ◽  
Titanium Alloys ◽  
Direct Observation ◽  
Dark Field ◽  
X Ray Diffraction ◽  
Resistivity Measurements ◽  
Selected Area Electron Diffraction ◽  
Ti Alloys ◽  
Thin Foils ◽  
Field Device

The electron microscope has been used to study the diffusionless β → β + ω transformation occurring in certain titanium alloys at low temperatures. Evidence for such a transformation was obtained by Cometto et al by means of x-ray diffraction and resistivity measurements on a Ti-Nb alloy. The present work shows that this type of transformation can occur in several Ti alloys of suitable composition, and some of the details of the transformation are elucidated by means of direct observation in the electron microscope.Thin foils were examined in a Philips EM-300 electron microscope equipped with a uniaxial tilt, liquid nitrogen cooled, cold stage and a high resolution dark field device. Selected area electron diffraction was used to identify the phases present and the ω-phase was imaged in dark field by using a (101)ω reflection. Alloys were water quenched from 950°C, thinned, and mounted between copper grids to minimize temperature gradients in the foil.

A New 1000kv Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 100-101
Author(s):  
J.L. Williams ◽  
K. Heathcote ◽  
E.J. Greer
Keyword(s):  
Electron Microscope ◽  
Direct Observation ◽  
High Voltage ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Specimen Thickness ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
Dynamic Experiments ◽  
Conventional Instrument

High Voltage Electron Microscope already offers exciting experimental possibilities to Biologists and Materials Scientists because the increased specimen thickness allows direct observation of three dimensional structure and dynamic experiments on effectively bulk specimens. This microscope is designed to give maximum accessibility and space in the specimen region for the special stages which are required. At the same time it provides an ease of operation similar to a conventional instrument.

Direct Observation of Monolayer Zones in Al-wt 4% Cu

1990 ◽  
Vol 48 (1) ◽  
pp. 14-15
Author(s):  
B. Jouffrey ◽  
D. Dorignac ◽  
A. Bourret
Keyword(s):  
Solid Solution ◽  
Synchrotron Radiation ◽  
Direct Observation ◽  
Supersaturated Solid Solution ◽  
Original Model ◽  
X Ray ◽  
Image Position

Since the early works on GP zones and the model independently proposed by Preston and Guinier on the first steps of precipitation in supersaturated solid solution of aluminium containing a few percent of copper, many works have been performed to understand the structure of different stages in the sequence of precipitation.The scheme which is generally admitted can be drawn from a work by Phillips.In their original model Guinier and Preston analysed a GP zone as composed of a single (100) copperrich plane surrounded by aluminum atomic planes with a slightly shorter distance from the original plane than in the solid solution.From X-ray measurements it has also been shown that GP1 zones were not only copper monolayer zones. They could be up to a few atomic planes thick. Different models were proposed by Guinier, Gerold, Toman. Using synchrotron radiation, proposals have been recently made.

Clinical Update: Functional Capacity Evaluations and Disability

1998 ◽  
Vol 3 (2) ◽  
pp. 4-5
Author(s):  
Glenn Pransky
Keyword(s):  
Direct Observation ◽  
Functional Capacity ◽  
Work Capacity ◽  
Functional Capacity Evaluation ◽  
Whole Body ◽  
Validity Of Results ◽  
Job Tasks ◽  
Capacity Evaluation ◽  
Physical Abilities ◽  
The Relationship

Abstract According to the AMA Guides to the Evaluation of Permanent Impairment, a functional capacity evaluation (FCE) measures an individual's physical abilities via a set of activities in a structured setting and provides objective data about the relationship between an impairment and maximal ability to perform work activities. A key distinction between FCEs and self-reported activities of daily living is that the former involve direct observation by professional evaluators. Numerous devices can quantify the physical function of a specific part of the musculoskeletal system but do not address the performance of whole body tasks in the workplace, and these devices have not been shown to predict accurately the ability to perform all but the simplest job tasks. Information about reliability has been proposed as a way to identify magnification and malingering, but variability due to pain and poor comprehension of instructions may cause variations in assessments. Structured work capacity evaluations involve a set of activities but likely underestimate the individual's ability to do jobs that involve complex or varying activities. Job simulations involve direct observation of an individual performing actual job tasks, require a skilled and experienced evaluator, and raise questions about expense, time, objectivity and validity of results, and interpretation of results in terms of the ability to perform specific jobs. To understand the barriers to return to work, examiners must supplement FCEs with information regarding workplace environment, accommodations, and demotivators.

M. genitalium Infects 11% of Sexually Active Teens

Ob Gyn News ◽  
2005 ◽  
Vol 40 (10) ◽  
pp. 14
Author(s):  
TIMOTHY F. KIRN
Keyword(s):  
Sexually Active
Sign in / Sign up

Export Citation Format

Share Document