منابع مشابه
P-14: Sperm Quality in Male Adult Rat That Were Treated with Cyclosporine
Background: Spermatozoa are germ cells that have a pivotal role at fertilisation. Infertility is a problem with a large magnitude. Sperm damages are one of the factors that cause infertility. Reactive oxygen species (ROS) like hydrogen peroxide (H2O2), superoxide anion (O2−U) or molecules and/or hydroxyl radical (UOH) affect both male and female gametes. Cyclosporine A (CsA), a neutral lipophil...
متن کاملSome of Charles Darwin’s most important observations in formulating his theory of evolution were of the Galapagos finches,
| There is increasing evidence for the existence of unique ecosystems that are dominated by locally adapted microbiota which harbour distinct lineages and biological capabilities, much like the macrobiota of Darwin’s Galapagos Islands. As a primary example of such a system, we highlight key discoveries from the Cuatro Ciénegas basin in Mexico. We argue that high microbial endemism requires a co...
متن کاملPlastid genes that were lost along the road to parasitism.
Some plants rely on others to do their photosynthesis for them. For example, most plants in thebroomrape family (Orobanchaceae; see figure) are parasitic, meaning they rely on a host plant for inorganic and organic nutrients as well as water. In most land plants, the selective pressure on photosynthesis-related elements causes plastid chromosomes to be conserved in terms of structure, gene cont...
متن کاملAdventitious sporulation in Fusarium: The yeast that were not
In immunocompromised patients, Fusarium species cause infections that lead to high mortality. Our case report describes a case of disseminated fusariosis in a neutropenic patient with AML after myelosuppressive chemotherapy, and a neutropenic multiple myeloma patient with Fusarium fungemia awaiting stem cell collection. Both cases highlight the fact that Fusarium can grow as yeast-like structur...
متن کاملLife in the Galapagos Islands
Estrogens and other endocrine disrupting compounds (EDCs) in the environment present a unique problem for environmental health. As an unregulated class of compounds, an accurate assessment of whether estrogens are present in the environment is critical. Current Environmental Protections Agency (EPA) standards for the analysis of organic molecules in water rely on removal of the compounds via li...
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ژورنال
عنوان ژورنال: Nature
سال: 1992
ISSN: 0028-0836,1476-4687
DOI: 10.1038/355202a0