The influence of some physical characteristics of the milking machine on the rate of new mastitis infections

1973 ◽  
Vol 40 (1) ◽  
pp. 117-129 ◽  
Author(s):  
C. C. Thiel ◽  
Carol L. Cousins ◽  
D. R. Westgarth ◽  
F. K. Neave
Keyword(s):  
Short Duration ◽  
Streptococcus Agalactiae ◽  
The Other ◽  
Vacuum Fluctuations ◽  
Infection Rates ◽  
Experimental Conditions ◽  
Different Types ◽  
Before And After ◽  
Milking Machine ◽  
Do So

SummaryLarge differences in new infection rates occurred with half-udder milking machines in which one half of the cluster operated substantially free from vacuum fluctuations while the other half was subjected to various combinations of different types of fluctuation in vacuum. To increase the rate of new infection all teats were contaminated before and after each milking by immersion in a suspension of Streptococcus agalactiae and Str. dysgalactiae. A series of short-duration trials indicated that neither irregular nor cyclic fluctuations in vacuum acting alone were able to increase new infection rate. However, either the Nyhan and Cowhig irregular fluctuation, or a variant of it in combination with cyclic fluctuations in vacuum, was able to do so under the particular experimental conditions used.

THE ETHICS AND ECONOMICS OF THE MINIMUM WAGE

2004 ◽  
Vol 20 (2) ◽  
pp. 351-374 ◽  
Author(s):  
T. M. WILKINSON
Keyword(s):  
Minimum Wage ◽  
The Other ◽  
Freedom Of Contract ◽  
Ethics And Economics ◽  
Normative Evaluation ◽  
Different Types ◽  
Do So

This paper develops a normative evaluation of the minimum wage in the light of recent evidence and theory about its effects. It argues that the minimum wage should be evaluated using a consequentialist criterion that gives priority to the jobs and incomes of the worst off. This criterion would be accepted by many different types of consequentialism, especially given the two major views about what the minimum wage does. One is that the minimum wage harms the jobs and incomes of the worst off and the other is that it does neither much harm nor much good. The paper then argues at length that there are no important considerations besides jobs and incomes relevant to the assessment of the minimum wage. It criticizes exploitation arguments for the minimum wage. It is not clear that the minimum wage would reduce exploitation and the paper doubts that, if it did, it would do so in a morally significant way. The paper then criticizes freedom arguments against the minimum wage by rejecting appeals to self-ownership and freedom of contract and by arguing that no freedom of significance is lost by the minimum wage that is not already taken account of in the main consequentialist criterion. The conclusion is that, at worst, the minimum wage is a mistake and, at best, something to be half-hearted about.

scholarly journals The Bifurcations of the Critical Points and the Role of Depth in a Symmetric Caldera Potential Energy Surface

2021 ◽  
Vol 31 (11) ◽  
pp. 2130034
Author(s):  
Y. Geng ◽  
M. Katsanikas ◽  
M. Agaoglou ◽  
S. Wiggins
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Critical Points ◽  
Energy Surface ◽  
The Other ◽  
Different Types ◽  
Before And After ◽  
The One ◽  
The Way

In this work, we continue the study of the bifurcations of the critical points in a symmetric Caldera potential energy surface. In particular, we study the influence of the depth of the potential on the trajectory behavior before and after the bifurcation of the critical points. We observe two different types of trajectory behavior: dynamical matching and the nonexistence of dynamical matching. Dynamical matching is a phenomenon that limits the way in which a trajectory can exit the Caldera based solely on how it enters the Caldera. Furthermore, we discuss two different types of symmetric Caldera potential energy surface and the transition from the one type to the other through the bifurcations of the critical points.

scholarly journals Testing the effectiveness of disinfectant protocols for soiled footwear

2008 ◽  
Vol 61 ◽  
pp. 384-384
Author(s):  
S.D. Young ◽  
M.R. McNeill ◽  
D.J. Saville
Keyword(s):  
New Zealand ◽  
The Other ◽  
Polysorbate 80 ◽  
Culturable Bacteria ◽  
Running Shoes ◽  
Different Types ◽  
Before And After ◽  
Bacteria And Fungi ◽  
Better Than

Footwear carried by international air travellers arriving in New Zealand is subject to inspection and if necessary cleaning and disinfecting by MAFBNZ quarantine inspectors A study to evaluate the effectiveness of disinfectant treatment was carried out on three different types of footwear (running shoes gumboots and tramping boots) cleaned following observed MAFBNZ procedure (dip) and following a 10 minute soak Two disinfectant treatments (VirkonTM and TriGene AdvanceTM) were compared with a surfactant (polysorbate 80) and water only Soles were swabbed for microbes before and after washing and culturable bacteria and fungi per cm2 were enumerated Disinfectant treatments reduced bacteria numbers by 99 compared with 98 for both water and surfactant treatments VirkonTM was the best treatment for bacteria both with the standard dip and the 10 minute soak but it was not significantly better than the other treatments Soaking also reduced bacterial numbers compared to the dip treatment but not significantly For fungi the two disinfectants surfactant and water yielded similar reductions (97) Soaking reduced fungal numbers compared to the dip treatment but this was not quite significant (P0051)

scholarly journals Comparing Meal Satisfaction Based on Different Types of Tableware: An Experimental Study of Japanese Cuisine Culture

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1546
Author(s):  
Tomoko Hasegawa ◽  
Nobuyuki Sakai
Keyword(s):  
Food Industry ◽  
The Other ◽  
Food Preparation ◽  
Japanese Culture ◽  
Japanese People ◽  
Perceptual Evaluation ◽  
Different Types ◽  
Before And After ◽  
The Difference ◽  
Plastic Containers

In Japan, as in other countries, the externalization of food preparation is increasing. Japanese people are interested in the combination of food and tableware and they are concerned about transferring ready-made meals from plastic containers to natural tableware. This study aimed to examine the varying evaluations of meals due to differences in tableware. In this study, we investigated the effect of tableware on meal satisfaction, which is emphasized in Japanese culture. We studied the difference in the evaluation of ready-made meals (a rice ball, salad, croquette, and corn soup) before, during, and after a meal under two conditions: plastic tableware and natural wooden tableware. The results showed that there was no difference in the perceptual evaluation of taste and texture during the meal, except for the color of the salad and the temperature of the soup. On the other hand, meals served on natural wooden tableware were rated more positively than those served on plastic tableware before and after meals. These results suggest that, in Japan, the use of tableware, even for ready-made meals, increases the level of meal satisfaction. These findings have implications for both the providers and consumers of ready-made meals as well as the food industry.

scholarly journals An Evaluation of the Effects of the Potato Starch on the Biogas Produced from the Anaerobic Digestion of Potato Wastes

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2399 ◽  
Author(s):  
R. Alrefai ◽  
A.M. Alrefai ◽  
K.Y. Benyounis ◽  
J. Stokes
Keyword(s):  
Response Surface Methodology ◽  
Anaerobic Digestion ◽  
Response Surface ◽  
Food Processing ◽  
Potato Starch ◽  
The Other ◽  
Total Weight ◽  
Different Types ◽  
Before And After ◽  
Potato Peels

Anaerobic digestion (AD) has undergone many developments since its first appearance. Despite that, there are still some environmental and economical obstacles that are limiting its sustainability. On the other hand, different types of starch have proven their effectiveness in some different applications. Food processing industries are considered one of the largest generators of waste in the environment. With an aid of the response surface methodology (RSM), the proposed study aimed to find an optimised way to overcome the obstacles by studying the impacts of the starch isolated from the potato peels on the biogas produced from the AD of potato peels before and after starch separation. The study found that potato peels represented approximately 12.5% of the potato total weight. The starch has only a slight influence on the quantity of the biogas produced and much lower influences on its quality. This finding suggests further investigation is required on the production of starch bio-based products simultaneously with the biogas and bio-slurry, which may mitigate environmental influences and economical obstacles of AD and make it more commercially attractive. The study showed also that the highest energy gain by the g-VS/0.2 L of potato peels was 62.9% at 35 °C, 1.62 g-VS/0.2 L organic concentration and 50% sludge concentration, which yielded a maximum CH4 of 72.4%.

Anomalous Rheological Behavior of Complex Fluids (Nanofluids)

2011 ◽  
Author(s):  
Byeongnam Jo ◽  
Seunghwan Jung ◽  
Donghyun Shin ◽  
Debjyoti Banerjee
Keyword(s):  
Experimental Study ◽  
Rheological Behavior ◽  
Metal Salt ◽  
Complex Fluids ◽  
Shear Thinning ◽  
The Other ◽  
Metal Salts ◽  
Different Types ◽  
Before And After ◽  
Newtonian Behavior

The rheological behavior of various complex fluids was explored in this experimental study. Nanofluids were obtained by mixing nanoparticles with various solvents. The solvents consisted of metal salt eutectics that melt at high temperatures (exceeding 200 °C) depending on the composition of the metal salts in the eutectics. The rheological behaviors of these high temperature solvents were measured as a function of temperature before and after mixing with different types of nanoparticles (chemical composition, size, shape and concentration). These nanofluids exhibited non-Newtonian behavior (shear thinning behavior) while some of the other nanofluids were surprisingly found to have Newtonian behavior. It was observed that high aspect ratio nanoparticles (e.g., stick shaped carbon nanotubes) were more likely to cause shear thinning behavior of the resulting nanofluids.

A multi-valved milking machine cluster to control intramammary infection in dairy cows

1988 ◽  
Vol 55 (2) ◽  
pp. 155-169 ◽  
Author(s):  
Tony K. Griffin ◽  
Robert J. Grindal ◽  
A. John Bramley
Keyword(s):  
Dairy Cows ◽  
Streptococcus Agalactiae ◽  
Field Conditions ◽  
Experimental Conditions ◽  
Intramammary Infection ◽  
Milking Machine ◽  
Clinical Cases

SummaryA milking machine claw incorporating valves to prevent movement of milk between teats during milking, and its contribution to the prevention of udder infection under experimental and field conditions, is described. Under experimental conditions a suspension of Streptococcus agalactiae and Str. dysgalactiae was introduced into the milking cluster during milking; 11 of 40 quarters became infected using a conventional claw piece whereas none of 40 quarters milked with the multivalve claw developed intramammary infection. In a 12-month experiment in ten commercial herds, each split into two equal susceptibility groups, the multi-valved cluster reduced the incidence of new infection with coliforms and Str. uberis by 17% (P < 0·1). The incidence of all new infections and new clinical cases was 14 and 25% lower compared to conventional clusters but these reductions were not significant.

scholarly journals Study of the Dissolution of Stainless-Steel Slag Minerals in Different Acid Environments to Promote Their Use for the Treatment of Acidic Wastewaters

2021 ◽  
Vol 11 (24) ◽  
pp. 12106
Author(s):  
Mattia De Colle ◽  
Ross Kielman ◽  
Andreas Karlsson ◽  
Andrey Karasev ◽  
Pär G. Jönsson
Keyword(s):  
Stainless Steel ◽  
Steel Slag ◽  
Dicalcium Silicate ◽  
The Other ◽  
Experimental Conditions ◽  
Stainless Steel Slag ◽  
Ph Values ◽  
Neutralizing Capacity ◽  
Mineral Compositions ◽  
Do So

Several stainless-steel slags have been successfully employed in previous studies as substitutes for lime in the treatment of industrial acidic wastewaters. This study deepens the knowledge of such application, by analyzing the neutralizing capacity of different slags related to their mineral compositions. To do so, firstly the chemical and mineral compositions of all the slag samples are assessed. Then, 0.5 g, 1 g, 2 g of each slag and 0.25 g and 0.5 g of lime are used to neutralize 100 g of 0.1 M HCl or HNO3 solutions. After the has neutralization occurred, the solid residues are extracted and analyzed using XRD spectroscopy. Then, the solubility of the minerals is assessed and ranked, by comparing the XRD spectra of the residues with the obtained pH values. The results show that minerals such as dicalcium silicate and bredigite are highly soluble in the selected experimental conditions, while minerals such as merwinite and åkermanite, only partially. Moreover, Al-rich slags seem to perform poorly due to the formation of hydroxides, which generate extra protons. However, when the weight of slag is adequately adjusted, Al-rich slags can increase the pH values to higher levels compared to the other studied slags.

scholarly journals Wykorzystanie Internetu w rozwijaniu autonomii ucznia – wyniki badania ankietowego

Neofilolog ◽  
2010 ◽  
pp. 221-232
Author(s):  
Mariusz Kruk
Keyword(s):  
The Other ◽  
The Internet ◽  
Control Group ◽  
Internet Resources ◽  
Different Types ◽  
Before And After ◽  
Use Of The Internet ◽  
Types Of Instruction ◽  
And Control ◽  
Experimental Group

The aim of the article is to show the extent to which the use of the Internet resources promotes the development of learner autonomy among Polish senior high school learners of English. The data were gathered by means of a questionnaire before and after the treatment and subjected to quantitative and qualitative analysis. It should be noted that the data came from a larger research project in which two groups, experimental and control, received different types of instruction. More precisely, the learners in the experimental group gained access to the Internet and exercised more freedom in learning. On the other hand, the control group students were taught in a traditional way. The results indicate that the experimental learners became more autonomous than their control counterparts.

A study of cometary eruptions through OH radio-lines

1999 ◽  
Vol 173 ◽  
pp. 249-254
Author(s):  
A.M. Silva ◽  
R.D. Miró
Keyword(s):  
Short Duration ◽  
Growth Curves ◽  
The Other ◽  
Initial Mass ◽  
Radio Lines ◽  
Other Hand ◽  
Sudden Rise

AbstractWe have developed a model for theH2OandOHevolution in a comet outburst, assuming that together with the gas, a distribution of icy grains is ejected. With an initial mass of icy grains of 108kg released, theH2OandOHproductions are increased up to a factor two, and the growth curves change drastically in the first two days. The model is applied to eruptions detected in theOHradio monitorings and fits well with the slow variations in the flux. On the other hand, several events of short duration appear, consisting of a sudden rise ofOHflux, followed by a sudden decay on the second day. These apparent short bursts are frequently found as precursors of a more durable eruption. We suggest that both of them are part of a unique eruption, and that the sudden decay is due to collisions that de-excite theOHmaser, when it reaches the Cometopause region located at 1.35 × 105kmfrom the nucleus.

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