The hepatic synthesis of sterol was measured in the male Mongolian gerbil (Meriones unguiculatus) in vivo following the administration of [3H]water by monitoring the incorporation of radioactivity into digitonin-precipitable sterol. A diurnal rhythm in cholesterol synthesis was exhibited under conditions of ad libitum feeding with alternating 12-hour periods of light (0200 to 1400 hr) and dark ...

Caffeine 2 The present study looks at the effects of stomach loads of caffeine on operant behavior in Mongolian gerbils (Meriones unguiculatus). Four male and four female gerbils were trained to a fixed interval schedule of 30 seconds with Nayes 4.5 mg rodent pellets used for reinforcement. A data collection and analysis package for Apple computers was used to measure the post-reinforcement res...

The Mongolian gerbil (Meriones unguiculatus) has been used extensively as a model of forebrain ischemia. Its unique susceptibility to ischemia was suggested to be due to an incomplete circle of Willis. The relative ease to which ischemia can be induced combined with highly reproducible delayed CA1 cell death following a 5 min occlusion made the model popular in neuroprotection studies. Presentl...

Two experiments were undertaken to investigate the cause of the observed tendency of Mongolian gerbil dams to gestate more male than female fetuses in their right uterine horns and more female than male fetuses in their left uterine horns. It was found in Expt 1 that female gerbils that had both ovaries removed and portions of their right ovary placed in both ovarian capsules gestated significa...

The purpose of the study is to examine types of lexical errors committed by EFL Mongolian learners in their writing. A total of 525 errors in 62 English writings by Mongolian English majors were identified and analyzed. Supplementary information is also collected by means of questionnaire and interviews for more comprehensive understanding of the factors affecting the errors. Possible solutions...

1 Project 19774035. Supported by National Natural Science Foundation of China. This research is conducted under guidance of two professors: Bao Huaiqiao, Choijongjab. [Abstract] This thesis proves that the main acoustic feature of Mongolian bisyllabic words is the duration of the vowels after analysis and generalization of the acoustic pattern of the prosodic features of monosyllabic and bisyll...

Recent evidence suggests that the dorsal raphe nucleus (DRN) of the brainstem is a collection of neuronal clusters having different neurochemical characteristics and efferent projection patterns. To gain further insight into the neuroanatomic organization of the DRN, neuronal populations projecting to the superior colliculus (SC) were mapped in a highly visual rodent, the Mongolian gerbil (Meri...

The Mongolian gerbil is being increasingly used as a laboratory animal and as a pet. Both chinchillas and gerbils are used as animal models for otitis media and other otic research. Previously, only incomplete information was available regarding the indigenous bacterial flora of the lower intestinal tracts of these coprophagic animals. Using the strict anaerobic methodology of the Virginia Poly...

The left side of the tongue of the Mongolian gerbil, Meriones unguiculatus, was experimentally innervated with both chorda tympani nerves. While this dual innervation did not increase the number or volume of fungiform taste buds on the left side, at least half of the taste buds were dually innervated since they could be neurotrophically maintained by either chorda tympani nerve. Impulse dischar...

No previous report has demonstrated the relationship between Helico bacter pylori (HP) infection and gastric carcinogenesis in an experimental animal model. A total of 170 male Mongolian gerbils (MGs) were divided into nine groups (18 S n S 20 for each group). MGs of four groups were inoculated with HP before or after continuous A'-methyl-A'-nitrosourea (MNU) administration via the drinking wat...