(n.) Any one of several species of small arctic rodents of the genera Myodes and Cuniculus, resembling the meadow mice in form. They are found in both hemispheres.
Example Sentences:
(1) The structure and ultrastructure of the following regions of the hypothalamo-hypophysial neurosecretory system (HHNS) in the population cycle of lemming were studied: supraoptic (SON), paraventricular (PVN) and arcuate nuclei (AN), the median eminence (ME) and posterior pituitary (PP).
(2) These results suggest that LEM are a reliable individual difference measure and are sensitive to task differences.
(3) Thus, the effects of LEM in stimulating hepatic amino acid transport appear to be direct, without mediation by other hormones, and to be independent of cAMP.
(4) In two patients with the Lambert-Eaton myasthenic syndrome (LEMS) and small-cell lung carcinoma (SLLC), therapy for LEMS was effective when combined with cancer therapy.
(5) This syndrome is likely to be autosomal recessive and resembles Smith-Lemli-Opitz (SLO) syndrome.
(6) Characteristic reduction of quantal content elicited at 1 Hz and facilitation at 20 Hz was observed in mice treated with LEMS plasma compared to those treated with control plasma.
(7) The Smith-Lemli-Opitz syndrome is characterized by mental retardation, hypotonia, facial dysmorphism and abnormalities of the limbs, genitalia and kidneys.
(8) To test this hypothesis, mouse diaphragms were exposed to control and LEMS IgG and IgG fragments in organ culture for 24 hours and then studied by quantitative freeze-fracture electron microscopy.
(9) LEMS IgG also acts at motor nerve terminal Ca2+ channels leading to muscle weakness.
(10) The tested substances included two sulfated polysaccharides (lentinan sulfate and dextran sulfate) and a nonsulfated polysaccharide PSK, E-P-LEM, glycyrrhizin sulfate, and nucleoside analogues (AZT and DHT).
(11) Replication patterns of the X chromosomes were studied in X*XY wood lemmings with male and female phenotypes.
(12) Measurements of leukocytic endogenous mediator (LEM) activity, i.e., lowering of plasma iron and zinc and increases in blood neutrophils, were made on the same supernatant media.
(13) Plasma insulin and glucagon responses to crude LEM may explain increases in hepatic cAMP, uptake of AA, and glycogenolysis as well as hypoglycemia.
(14) LEMS IgG was equally effective in C5-deficient mice, indicating that late complement components are not required.
(15) Since some factor enhancing antibody response was detected in the culture supernatant of LEM-treated macrophages, this was fractionated by gel filtration, which revealed a substance with a molecular weight of about 15,000 daltons.
(16) The wood lemming, Myopus schisticolor, the collared lemming, Dirostonyx torquatus, and perhaps also one or two species of the genus Akodon have XX and XY females and XY males.
(17) Inhibition of the infectivity and cytopathic effect of human immunodeficiency virus type 1 (HIV-1) by the immunoactive fractions obtained from LEM, which is an extract of the culture medium of Lentinus edodes mycelia, is reported.
(18) This study describes the sequential formation of lesions associated with the endogenous development of Sarcocystis rauschorum (Apicomplexa: Sarcocystidae) in varying lemmings, Dicrostonyx richardsoni.
(19) Simultaneously registered EEG (O1-Cz and O2-Cz) and lateral eye movements (LEM) were analyzed with reference to different stimuli.
(20) SD-exposed lemmings showed 19.2% greater growth than those in LD, resulting primarily from a 29.2 and 15.0% increase in lean and ash components, respectively.
Rodent
Definition:
(v. t.) Gnawing; biting; corroding; (Med.) applied to a destructive variety of cancer or ulcer.
(v. t.) Gnawing.
(v. t.) Of or pertaining to the Rodentia.
(n.) One of the Rodentia.
Example Sentences:
(1) Intoxicating concentrations of ethanol also inhibit excitatory synaptic transmission mediated by N-methyl-D-aspartate receptors in hippocampal slices from adult rodents.
(2) This is the first clear example of activation of the K-ras gene by ethylating agents in a rodent lung tumor system.
(3) The relatively high incidence of nephroblastoma in the Nb rat using transplacentally administered ENU appears to represent a suitable basis for developing a rodent model of human nephroblastoma or Wilms' tumor.
(4) Male Sprague Dawley rats either trained (T, N = 9) for 11 wk on a rodent treadmill, remained sedentary, and were fed ad libitum (S, N = 8) or remained sedentary and were food restricted (pair fed, PF, N = 8) so that final body weights were similar to T. After training, T had significantly higher red gastrocnemius muscle citrate synthase activity compared with S and PF.
(5) This model of protective immunity in a Brugia-susceptible small rodent may provide a useful system for identification of molecularly defined filarial-protective immunogens.
(6) The receptor pattern observed in tumors does not support the hypothesis previously raised in the case of chemically induced colonic tumors in rodents.
(7) It is concluded that these rodent studies do not implicate any specific inhalational anesthetic agent in fetal toxicity, and that the effects of additional factors, such as stress, must be considered.
(8) In the course of routinely performed subchronic toxicity studies with laboratory rodents, functional neurotoxicity, i.e.
(9) Particularly striking is the distribution of CpG dinucleotides within human and rodent APRT genes.
(10) There was less of an increase following a blood meal infected with the rodent malaria parasite, Plasmodium berghei.
(11) An analysis of 54 protein sequences from humans and rodents (mice or rats), with the chicken as an outgroup, indicates that, from the common ancestor of primates and rodents, 35 of the proteins have evolved faster in the lineage to mouse or rat (rodent lineage) whereas only 12 proteins have evolved faster in the lineage to humans (human lineage).
(12) The differences in immunoreactivity between rodent and human amyloid plaques are consistent with other findings showing that cellular genes, not infectious purified prions, encode PrP.
(13) These products, as well as several synthetic intermediates, were evaluated for antifilarial activity against Molinema dessetae either in vivo in its natural host, the rodent Proechimys oris, or in vitro by a new test using cultures of the infective larvae.
(14) An increased neuronal activity was obtained by exercising the rats in a commercial rodent treadmill a couple of hours per day for 14 days.
(15) In a series of experiments we found that 1) growth rates of hamsters offered the Lyric diet alone or in conjunction with the standard rodent diet exceeded those of hamsters offered only the standard rodent diet.
(16) A model system of exfoliated normal human cervicovaginal squamous cells, exfoliated rodent tumor cells, and acellular, viscous, mucuslike material was used to investigate cell deposition on smear preparations made with three different instruments: plastic spatulas, wooden spatulas, and brush-tipped collectors.
(17) With repeated administrations, rodents become increasingly sensitive to the stimulant properties of amphetamine, a phenomenon termed sensitization.
(18) Although the overall rate of thymidine incorporation was lower than that for rodent cells, human hepatocytes were sensitive to lower concentrations of these growth factors, and the degree of stimulation was similar.
(19) Daily cocaine injection into rodents produces a progressive increase in the motor stimulant effect of acute cocaine administration.
(20) Since PEG-1000 treatment of HPRT- Chinese hamster cells in the absence of human cells yielded no HPRT+ cells, it is concluded that the element responsible for the restoration of rodent HPRT was contributed by the human cells and not by the agent employed to promote fusion.