The effects of offering different degrees of social contact in indoor farrowing systems on the welfare of piglets post-weaning

2000 ◽  
Vol 2000 ◽  
pp. 133-133
Author(s):  
S. Malkin ◽  
J. N. Marchant ◽  
J. E. L. Day
Keyword(s):  
Social Contact ◽  
Welfare Benefits ◽  
Research Programmes ◽  
Piglet Mortality ◽  
Better Than

Previous research into free-farrowing systems for pigs has found that although sow welfare is better than in crated systems, piglet mortality levels are often unacceptably high. Whilst on-going research programmes are investigating methods to address this problem, the effect of alternative farrowing systems on piglet behaviour and welfare post-weaning is largely unknown. A recent study found that the increased social contact between piglets reared outdoors prior to weaning resulted in welfare benefits post-weaning (Cox and Cooper, 1999). The aim of this experiment was to investigate whether offering different degrees of social contact in an indoor community-lactation system would confer similar enhancements to piglet welfare post-weaning.

The effects of sow maternal behaviour on piglet mortality in an open farrowing system

1996 ◽  
Vol 1996 ◽  
pp. 196-196 ◽  
Author(s):  
J.N. Marchant ◽  
D.M. Broom ◽  
S. Corning
Keyword(s):  
Maternal Behaviour ◽  
Freedom Of Movement ◽  
Welfare Benefits ◽  
Potential Risks ◽  
Survival And Growth ◽  
Piglet Mortality

Community lactating systems offer a number of potential welfare benefits to the sow and her litter. However, giving the sow greater freedom of movement and choice of environments also has potential risks. With less restriction, the maternal qualities of the sow will have a greater influence on the survival and growth of her litter. The objectives of this experiment were to determine what behaviours of the sow influenced piglet mortality in an open communal farrowing system

scholarly journals Arguing Skillfully with Argument-Driven Inquiry Science Textbooks

2021 ◽  
Vol 9 (1) ◽  
pp. 119-138
Author(s):  
Wirawan Fadly* ◽  
Miaturrohmah Miaturrohmah
Keyword(s):  
Social Contact ◽  
Control Group ◽  
Sampling Techniques ◽  
Scientific Paradigms ◽  
Qualitative Descriptive ◽  
Randomized Control ◽  
Quantitative Descriptive ◽  
And Control ◽  
The Relationship ◽  
Better Than

Argumentation skills have an important role in 21st-century learning because it can facilitate constructing the relationship between theory and understanding the concept of science. The development of textbooks based on argumentation skills can bridge science theories and ideas, especially with the Covid-19 pandemic, limiting social contact between communities and students so that they have to work and study from home. Textbooks can be a solution to assist students to learn independently. This study aims to determine the characteristics, practicality, and effectiveness of the developed argument-driven inquiry textbook (ADI). The research was conducted at MTsN 6 Ponorogo using the Research and Development (RD) method. Testing the practicality and effectiveness of textbooks was carried out using a randomized control group pretest-posttest design. The number of research samples consisted of 124 students taken through random sampling techniques divided into experimental and control classes. Data were obtained from questionnaires, and argumentation skills tests were analyzed using quantitative descriptive and qualitative descriptive to determine practicality, and inferential statistics (t-test) to evaluate the effectiveness of the textbooks being developed. The results showed that ADI-based textbooks: 1) have the characteristics of being able to encourage students to argue critically and be able to construct students' logic and creativity in relating environmental problems, scientific concepts, and scientific paradigms through multi-disciplinary integration; 2) has a practicality level of 84%, which means that the contents of the book are very good at motivating students to learn, relevant to the material, and easy to understand from the material and language aspects; 3) effective in improving students' argumentative skills is better than classes that are not based on ADI (α = 0.05) with an increase in the moderate category (N-Gain = 47.17%).

The effects of sow maternal behaviour on piglet mortality in an open farrowing system

1996 ◽  
Vol 1996 ◽  
pp. 196-196
Author(s):  
J.N. Marchant ◽  
D.M. Broom ◽  
S. Corning
Keyword(s):  
Maternal Behaviour ◽  
Freedom Of Movement ◽  
Welfare Benefits ◽  
Potential Risks ◽  
Survival And Growth ◽  
Piglet Mortality

Community lactating systems offer a number of potential welfare benefits to the sow and her litter. However, giving the sow greater freedom of movement and choice of environments also has potential risks. With less restriction, the maternal qualities of the sow will have a greater influence on the survival and growth of her litter. The objectives of this experiment were to determine what behaviours of the sow influenced piglet mortality in an open communal farrowing system

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

Localization of immunolabels by electron microscopy and image averaging

1983 ◽  
Vol 41 ◽  
pp. 282-283
Author(s):  
J. Frank ◽  
P.-Y. Sizaret ◽  
A. Verschoor ◽  
J. Lamy
Keyword(s):  
Electron Microscopy ◽  
Single Particle ◽  
Attachment Site ◽  
Uranyl Acetate ◽  
Limulus Polyphemus ◽  
Resolution Limit ◽  
Electron Microscopic ◽  
Image Averaging ◽  
Top View ◽  
Better Than

The accuracy with which the attachment site of immunolabels bound to macromolecules may be localized in electron microscopic images can be considerably improved by using single particle averaging. The example studied in this work showed that the accuracy may be better than the resolution limit imposed by negative staining (∽2nm).The structure used for this demonstration was a halfmolecule of Limulus polyphemus (LP) hemocyanin, consisting of 24 subunits grouped into four hexamers. The top view of this structure was previously studied by image averaging and correspondence analysis. It was found to vary according to the flip or flop position of the molecule, and to the stain imbalance between diagonally opposed hexamers (“rocking effect”). These findings have recently been incorporated into a model of the full 8 × 6 molecule.LP hemocyanin contains eight different polypeptides, and antibodies specific for one, LP II, were used. Uranyl acetate was used as stain. A total of 58 molecule images (29 unlabelled, 29 labelled with antl-LPII Fab) showing the top view were digitized in the microdensitometer with a sampling distance of 50μ corresponding to 6.25nm.

Closing the GAP—A 5Å Scanning Microscope

1969 ◽  
Vol 27 ◽  
pp. 6-7
Author(s):  
A. V. Crewe
Keyword(s):  
Normal Form ◽  
The Other ◽  
Resolving Power ◽  
Scanning Microscope ◽  
Conventional Microscope ◽  
Other Hand ◽  
Closing The Gap ◽  
Thermal Sources ◽  
Better Than ◽  
Transmission Microscope

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.

Electron Microscopic Observation of the Longitudinal Organization of Poly (p-Phenylene Terephthalamide) Fibers

1982 ◽  
Vol 40 ◽  
pp. 680-681
Author(s):  
Li Li-Sheng ◽  
L.F. Allard ◽  
W.C. Bigelow
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Microscopic Observation ◽  
Electron Microscopic Observation ◽  
Electron Microscopic ◽  
Aromatic Polyamides ◽  
Radial Arrangement ◽  
Scanning Electron ◽  
Better Than

The aromatic polyamides form a class of fibers having mechanical properties which are much better than those of aliphatic polyamides. Currently, the accepted morphology of these fibers as proposed by M.G. Dobb, et al. is a radial arrangement of pleated sheets, with the plane of the pleats parallel to the axis of the fiber. We have recently obtained evidence which supports a different morphology of this type of fiber, using ultramicrotomy and ion-thinning techniques to prepare specimens for transmission and scanning electron microscopy.

A High Angle, Double Tilting Cold Stage for the AEI EM7

1974 ◽  
Vol 32 ◽  
pp. 450-451
Author(s):  
P.R. Swann ◽  
A.E. Lloyd
Keyword(s):  
Habit Plane ◽  
Temperature Control ◽  
Tilt Angle ◽  
Cooling System ◽  
Thermal Drift ◽  
High Angle ◽  
Cold Stage ◽  
High Degree ◽  
Better Than

Figure 1 shows the design of a specimen stage used for the in situ observation of phase transformations in the temperature range between ambient and −160°C. The design has the following features a high degree of specimen stability during tilting linear tilt actuation about two orthogonal axes for accurate control of tilt angle read-out high angle tilt range for stereo work and habit plane determination simple, robust construction temperature control of better than ±0.5°C minimum thermal drift and transmission of vibration from the cooling system.

Thermal Considerations in Lens Regulator Systems

1970 ◽  
Vol 28 ◽  
pp. 358-359
Author(s):  
K.C. Newton
Keyword(s):  
Electron Microscope ◽  
Thermal Effects ◽  
Environmental Control ◽  
Reference Networks ◽  
Better Than

Thermal effects in lens regulator systems have become a major problem with the extension of electron microscope resolution capabilities below 5 Angstrom units. Larger columns with immersion lenses and increased accelerating potentials have made solutions more difficult by increasing the power being handled. Environmental control, component choice, and wiring design provide answers, however. Figure 1 indicates with broken lines where thermal problems develop in regulator systemsExtensive environmental control is required in the sampling and reference networks. In each case, stability better than I ppm/min. is required. Components with thermal coefficients satisfactory for these applications without environmental control are either not available or priced prohibitively.

Finding the Right Problems: Some HREM Applications to Interfaces

1984 ◽  
Vol 42 ◽  
pp. 376-379
Author(s):  
D. Cherns
Keyword(s):  
Grain Boundaries ◽  
High Resolution Electron Microscopy ◽  
Boundary Structure ◽  
Atomic Structures ◽  
Grain Boundary Structure ◽  
Resolution Electron ◽  
Point To Point ◽  
The Right ◽  
New Generation ◽  
Better Than

The use of high resolution electron microscopy (HREM) to determine the atomic structure of grain boundaries and interfaces is a topic of great current interest. Grain boundary structure has been considered for many years as central to an understanding of the mechanical and transport properties of materials. Some more recent attention has focussed on the atomic structures of metalsemiconductor interfaces which are believed to control electrical properties of contacts. The atomic structures of interfaces in semiconductor or metal multilayers is an area of growing interest for understanding the unusual electrical or mechanical properties which these new materials possess. However, although the point-to-point resolutions of currently available HREMs, ∼2-3Å, appear sufficient to solve many of these problems, few atomic models of grain boundaries and interfaces have been derived. Moreover, with a new generation of 300-400kV instruments promising resolutions in the 1.6-2.0 Å range, and resolutions better than 1.5Å expected from specialist instruments, it is an appropriate time to consider the usefulness of HREM for interface studies.

Sign in / Sign up

Export Citation Format

Share Document