The genetic basis of hybrid male sterility among three closely related species, Drosophila bipectinata, D. parabipectinata and D. malerkotliana has been investigated by using backcross analysis methods. The role of Y chromosome, major hybrid sterility (MHS) genes (genetic factors) and cytoplasm (non-genetic factor) have been studied in the hybrids of these three species. In the species pair, bi...

BACKGROUND Madurella mycetomatis is the most common cause of human eumycetoma. The genus Madurella has been characterized by overall sterility on mycological media. Due to this sterility and the absence of other reliable morphological and ultrastructural characters, the taxonomic classification of Madurella has long been a challenge. Mitochondria are of monophyletic origin and mitochondrial gen...

Male sterility plays an important role in the utilization of heterosis rice. The establishment male sterile lines rice is one key technologies hybrid production systems. currently widely used line breeding systems mainly include: three-line based on cytoplasmic sterility, two-line environmental sensitive gene and third-generation nuclear Seed system. This study reviewed types mechanisms rice, l...

Sterility test is an established method for detecting the presence of viable forms of microorganisms in or on finished pharmaceutical products. Sterility, in this sense, means that a product is free from viable microorganisms (although not necessarily metabolic by-products or toxins). The classic form sterility test examines a pharmaceutical product in contact a culture medium, as a way of dete...

Cryopreservation of human spermatozoa has been used since 1954 (1). After surgical treatment, chemotherapy, or radiotherapy, permanent sterility or transient infertility of up to 5 years can occur (2). Therefore, cryopreservation is often recommended to preserve future fertility. However, sperm survival and motility are known to significantly decrease after the freeze-thaw process. Since sperm ...

ObjectiveTo conduct a systematic review and meta-analysis evaluating the effect of hydrosalpinx on pregnancy outcomes, to compare different types management their impact rates as well ovarian reserve.Data SourcesElectronic search using Pubmed, EMBASE, Ovid MEDLINE, Google Scholar, ClinicalTrials.gov, Cochrane Central Register Controlled Trials including all published studies that examined tubal...

SEC-23 is a component of coat protein complex II (COPII)-coated vesicles involved in the endoplasmic reticulum-to-Golgi transport pathway of eukaryotes. During postembryonic life, Caenorhabditis elegans is surrounded by a collagenous exoskeleton termed the cuticle. From a screen for mutants defective in cuticle secretion, we identified and characterized a sec-23 mutant of C. elegans. By sequenc...