Bovine pancreatic ribonuclease A (RNase A) catalyzes the cleavage of the P-O(5') bond in RNA. Although this enzyme has been the object of much landmark work in bioorganic chemistry, the nature of its rate-limiting transition state and its catalytic rate enhancement had been unknown. Here, the value of k(cat)/K(m) for the cleavage of UpA by wild-type RNase A was found to be inversely related to ...

Since the establishment of quantum mechanics, researchers in physics have been studying superposition states and especially proposing setups for generating macroscopic objects a state. Such are important interest both from foundational perspective their applications emerging technologies. Here, we propose circuit electrodynamical setup an adiabatic scheme preparing massive object The is based o...

the aim of the present study was to determine the presence of helicobacter species in different parts of gastrointestinal tract, hepatobiliary system and pancreas of stray cats. six different sites at the level of genus, gastric (h. heilmannii and h. felis) and enterohepatic species of helicobacter were investigated in six cats using species-specific primers by polymerase chain reaction (pcr). ...

background: cats and other felines act as definitive hosts for many intestinal parasites, some of which are responsible for several zoonotic diseases.  the aim of this study was to determine the type and prevalence of protozoa and gastrointestinal helminthes among stray cats. methods: a cross sectional study was conducted. digestive tracts of 100 stray cats in zanjan province, north-west of ira...

In this note we provide a characterization, in terms of additional algebraic structure, of those strict intervals (certain cocategory objects) in a symmetric monoidal closed category E that are representable in the sense of inducing on E the structure of a finitely bicomplete 2-category. Several examples and connections with the homotopy theory of 2-categories are also discussed. Introduction A...

linguatula serrata is a tongue-shaped parasite that infects carnivores or insectivorous reptile as final host and herbivores as intermediate ones. during necropsy of a 1.5-year-old female stray cat, a few white and fine nodules were observed on the diaphragmatic lobes of the lung. in histopathological examination, the nodules contained a turned spinosum parasite with cuticular spines and in par...

background: the occurrence of giardia duodenalis in cats is of potential significance from both clinical and public health perspectives. the object of this study was antigenic detection of g. duo­denalis in house­hold cats of ahvaz district, south-west of iran. methods: the prevalence of g. duodenalis was determined in fecal samples by two techniques: centrifuga­tion-flotation and a commercial ...