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Haploid like spermatid generation by transplantation of neonatal mouse testicular tissue into the epididymal fat of castrated adult mouse.
JBRA Assist Reprod
January 2025
Department of Anatomical Sciences, Faculty of Medicine, Tarbiat Modares University, Tehran, Iran.
Objective: Many cancer survivors may experience irreversible infertility due to chemotherapy treatment for childhood cancer. In this study, spermatogenesis development was evaluated following the grafting of fresh and frozen-thawed testicular tissue from neonatal mice to the epididymal fat of adult mice.
Methods: After bilateral castration of recipient mice, fresh or frozen-thawed neonatal testis tissues were grafted into the epididymal fat of the mice.
Abnormalities in mitochondrial energy metabolism induced by cryopreservation negatively affect goat sperm motility.
Front Vet Sci
January 2025
Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China.
The motility of sperm decreases following cryopreservation, which is closely associated with mitochondrial function. However, the alterations in mitochondrial metabolism after sperm freezing in goats remain unclear. This experiment aimed to investigate the impact of ultra-low temperature freezing on goat sperm's mitochondrial energy metabolism and its potential correlation with sperm motility.
View Article and Find Full Text PDFIron-oxidizing microorganisms affect the iron-bound organic carbon in the subsoil of alpine grassland during the thawing of seasonal frozen soil.
Front Microbiol
January 2025
College of Grassland Science, Xinjiang Agricultural University, Urumqi, China.
Iron (Fe) minerals possess a huge specific surface area and high adsorption affinity, usually considered as "rust tanks" of organic carbon (OC), playing an important role in global carbon storage. Microorganisms can change the chemical form of Fe by producing Fe-chelating agents such as side chains and form a stable complex with Fe(III), which makes it easier for microorganisms to use. However, in seasonal frozen soil thawing, the succession of soil Fe-cycling microbial communities and their coupling relationship with Fe oxides and Fe-bound organic carbon (Fe-OC) remains unclear.
View Article and Find Full Text PDFInvestigation of protein structure and quality of Acipenser sinensis frozen by liquid nitrogen.
J Sci Food Agric
January 2025
College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, China.
Background: The quality of Acipenser sinensis deteriorates significantly during frozen storage due to its high water, protein, and unsaturated fatty acid content. Conventional freezing methods are insufficient to preserve it effectively. This study investigated the effects of liquid nitrogen freezing (LNF) on the quality and myofibrillar protein (MP) characteristics of A.
View Article and Find Full Text PDFQuality deterioration mechanism of freeze-thawed sweet potato oat dough: In terms of ice crystals and protein changes.
J Food Sci
January 2025
College of Tourism and Culinary Science, Yangzhou University, Yangzhou, China.
Sweet potato-oat composite dough is a nutritious, functional dough with promising market potential. This study investigates its quality changes during freeze-thaw cycles from the perspectives of ice crystals and protein alterations to provide theoretical support for its processing and production. After freeze-thaw cycles, both the storage modulus and loss modulus of the dough decrease, resulting in increased hardness, reduced resilience and chewiness, lower sensory scores, decreased specific volume, and darker color.
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