Search

Your search keyword '"A. C. Grădinaru"' showing total 3 results
Start Over Author "A. C. Grădinaru" Language english
3 results on '"A. C. Grădinaru"'

1. Research on the Degradation Process of Railway Rails Due to Lifespan Exceeding

Author

A.C. Berbecaru, G. Coman, S. Ciucă, I.A. Gherghescu, M.G. Sohaciu, C. Grădinaru, and C. Predescu

Subjects
degradation, advanced wear, fatigue fracture, railway rails lifespan, Mining engineering. Metallurgy, TN1-997, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

The paper presents the impact of exceeding the railway rails lifespan which usually causes a railway structural failure, thus an accident. The research highlights the rails’s high degradation, especially on the running area, consisting in 60-70% weight loss by advanced wear of the rail, followed by fatigue fracture caused by alternating cyclic stresses that initiates the crack and also by tensile stresses resulting in the crack growth. The chemical composition, structural and mechanical properties were analyzed in order to establish the causes that led to the railway rails rupture.

Published
2022
Full Text
View/download PDF

2. Analysis of the Mitochondrial Genome in Podolian Cattle Breeds

Author

Madalina Alexandra Davidescu, Andrei C. Grădinaru, Constantin Pascal, Daniel Simeanu, Vasile Maciuc, Mihaela Ivancia, and Steofil Creanga

Subjects
bovine, genetic markers, mtdna, Agriculture, Technology, Science
Abstract

Podolian cattle breeds are represented by: Romanian Grey Steppe, Iskar Grey (Bulgarian Grey), Istrian, Katerini, Ukrainian Grey and Hungarian Grey. The mitochondrial genome in cattle has a length of about 16,338 nucleotides. The majority of taurine mtDNA sequences cluster within macro-haplogroup T, which consists of six subhaplogroups (T, T1, T2, T3, T4 and T5). Recent developments in DNA sequencing technologies provide new opportunities for the examination of genetic material in extinct or endangered species, providing a new perspective on their evolutionary history. This paper has as main purpose the analysis of the mitochondrial genome in podolian cattle breeds by consulting the most relevant research in the literature.

Published
2023

3. Milk Protein Polymorphism Characterization: a Modern Tool for Sustainable Conservation of Endangered Romanian Cattle Breeds in the Context of Traditional Breeding

Author

Firuţa Camelia Oroian, I. V. Petrescu-Mag, A. C. Grădinaru, Claudia Balint, and Ion Oltean

Subjects
0301 basic medicine, Geography, Planning and Development, Endangered species, TJ807-830, Context (language use), Management, Monitoring, Policy and Law, Biology, TD194-195, Indigenous, Renewable energy sources, 03 medical and health sciences, indigenous cattle, sustainable conservation, media_common.cataloged_instance, GE1-350, European union, media_common, Genetic diversity, Environmental effects of industries and plants, Renewable Energy, Sustainability and the Environment, business.industry, Agroforestry, genetic resistance, 0402 animal and dairy science, endangered breeds, 04 agricultural and veterinary sciences, 040201 dairy & animal science, Environmental sciences, 030104 developmental biology, Agriculture, Threatened species, Gene pool, business
Abstract

The paper aims to review literature data with respect to Romanian native cattle breeds which are considered at risk of extinction. In the last decades, the number of individuals of Romanian indigenous cows decreased significantly, as a consequence of the intensification and specialization of animal productions and agriculture modernization. Some of the native cattle breeds are already lost, due to their crossing with improved breeds. However, after the accession of Romania to the European Union, various preservation programs were initiated, and most of them included biochemical research and studies of molecular or quantitative genetics. All these, associated with the application of reproduction biotechnologies, give a chance to these animals, which are extremely valuable in terms of their genetic resistance to diseases and environmental factors. The reviewed literature on Romanian indigenous endangered cattle breeds confirms that these animals are carriers of a valuable gene pool, which can be kept and bred while applying different reproductive biotechnologies. Consequently, this paper raises awareness on two issues: the decrease of genetic diversity in two Romanian native cow breeds threatened with extinction (Grey Steppe and Romanian Pinzgauer); and the benefits of genetic diversity of the two breeds.

Published
2018

Catalog

Books, media, physical & digital resources
See catalog results