A dimensional reduction approach to modulate the core ruminal microbiome associated with methane emissions via selective breeding

2021 ◽  
Author(s):  
Alejandro Saborío-Montero ◽  
Adrían López-García ◽  
Mónica Gutiérrez-Rivas ◽  
Raquel Atxaerandio ◽  
Idoia Goiri ◽  
...  
Keyword(s):  
Dimensional Reduction ◽  
Selective Breeding ◽  
Methane Emissions ◽  
The Core ◽  
Reduction Approach

Evaluating a novel dimensional reduction approach for mechanical fractionation of cells using a tandem flexible micro spring array (tFMSA)

Lab on a Chip ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 691-701 ◽  
Author(s):  
Yin-Ting Yeh ◽  
Ramdane A. Harouaka ◽  
Si-Yang Zheng
Keyword(s):  
Physical Properties ◽  
Dimensional Reduction ◽  
Rational Design ◽  
Experimental Models ◽  
Cell Fractionation ◽  
Reduction Approach

We present a novel methodology to establish experimental models for the rational design of cell fractionation based on physical properties of cells.

scholarly journals Animal as the Solution: Searching for Environmentally Friendly Dairy Cows

2021 ◽  
Vol 13 (18) ◽  
pp. 10451
Author(s):  
Cameron J. Marshall ◽  
Pablo Gregorini
Keyword(s):  
Dairy Cows ◽  
Selective Breeding ◽  
Production Systems ◽  
Environmentally Friendly ◽  
Methane Emissions ◽  
Potential Solution ◽  
Urea Nitrogen ◽  
Breeding Values ◽  
Milk Urea ◽  
Milk Urea Nitrogen

There is increasing societal concern surrounding the environmental externalities generated from ruminant production systems. Traditional responses to address these externalities have often been system-based. While these approaches have had promising results, they have served to view the animal as a problem that needs solving, rather than as a potential solution. This review attempts to answer the question: can we breed animals that are more environmentally friendly to address environmental outcomes and satisfy consumer demand? This was done by exploring the literature of examples where animals have been specifically bred to reduce their environmental impact. The use of milk urea nitrogen breeding values has been demonstrated as a tool allowing for selective breeding of dairy cows to reduce nitrogen losses. Low milk urea nitrogen breeding values have been documented to result in reduced urinary nitrogen concentrations per urination event, which ultimately reduces the level of nitrogen that will be lost from the system. The ability to breed for low methane emissions has also shown positive results, with several studies demonstrating the heritability and subsequent reductions in methane emissions via selective breeding programs. Several avenues also exist where animals can be selectively bred to increase the nutrient density of their final product, and thus help to address the growing demand for nutrient-dense food for a growing human population. Animal-based solutions are permanent, cumulative, and often more cost-effective than system-based approaches. With continuing research and interest in breeding for more positive environmental outcomes, the animal can now start to be viewed as a potential solution to many of the issues faced by ruminant production systems, rather than simply being seen as a problem.

Structure of the Bloch wall in multilayers

2005 ◽  
Vol 461 (2058) ◽  
pp. 1911-1926 ◽  
Author(s):  
Carlos J García-Cervera
Keyword(s):  
Film Thickness ◽  
Magnetic Materials ◽  
Double Layer ◽  
Dimensional Reduction ◽  
Interlayer Spacing ◽  
Optimal Shape ◽  
Bloch Wall ◽  
One Dimensional ◽  
The Core ◽  
The One

We present an analysis of the structure of Bloch walls in layered magnetic materials in the context of micromagnetics. We have obtained the Γ -limit of a one-dimensional reduction of the Landau–Lifshitz energy for a double layer in several asymptotic regimes. As a result, the optimal energy, the core length and the optimal shape of the Bloch wall have been determined. The effects of the interlayer spacing and the film thickness are studied. A comparison between the structure of the Bloch and Néel walls in multilayers is carried out. We illustrate all our findings by numerically minimizing the one-dimensional energy.

scholarly journals Selective breeding as a mitigation tool for methane emissions from dairy cattle

animal ◽  
2021 ◽  
pp. 100294
Author(s):  
Y. de Haas ◽  
R.F. Veerkamp ◽  
G. de Jong ◽  
M.N. Aldridge
Keyword(s):  
Dairy Cattle ◽  
Selective Breeding ◽  
Methane Emissions
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