جستجوی مقالات مرتبط با کلیدواژه "histological studies" در نشریات گروه "زیست شناسی"

The identification of Anura amphibians species in the southeastern cities of Tehran province was examined through histological studies. 4 main stations (i.e. Pakdasht, Varamin, Qarchak, Pishva) were selected in the southeast of Tehran province. Then, 24 samples specimens were preserved at 10% formalin solution and transferred to the laboratory for histological studies. Studies have shown that in one group of samples (Green Toad, Pseudepidalea (Bufo) viridis) there were toxin-producing glands. In this group, the 3-layer epithelium and below it the chromatophores were quite visible. Beneath them were large glands that produce toxins, followed by connective tissue and then striped muscles. In a group of amphibians (Marsh frog, Pelophylax (Rana) ridibunda) collected, a 4-layer epithelium was observed that divided itself into two subgroups: some with mucosal secretory glands and some without mucosal glands, but in the latter two groups, chromatophores, connective tissue, striped muscles and cartilage were seen. Another group of amphibians found that the epithelium was three-layered but had no venom-producing glands or no mucosal glands, but two features were seen in histological observations, such as some with cartilage and some without cartilage. The results of histological studies showed that in addition to morphological, morphological and genetic studies, histological studies can be used to identify of Anura. These differences indicate the possibility of polymorphism in the Marsh frog species.

Alzheimer's disease begins in the Middle Ages, it progresses rapidly and leads to loss of individual mental health. Considering that the neuroprotective effect of Marshmallow (Althea officinalis)has been reported, in this study, the effect of the plant on Alzheimer's rat model and its effect on the improvement of passive avoidance memory was investigated.
Alzheimer's was initially induced by intra-ventricular injection of beta- amyloid peptide. In this experiment, male wistar rats (220-180 g) were used. The control group (no injection), sham group (saline injection), experimental group (injection of beta-amyloid (40-1)) and the groups which received marshmallow extract in 10, 50, 100 and 250 milligrams per kilogram of body weight by intraperitoneal injection for 7 days before and three weeks after beta-amyloid injection. Shuttle box was used to study the learning and memory behavior and H & E and Nissl staining were conducted for histological studies. The obtained data were analyzed by SPSS software (ANOVA and Tukey tests).
Data showed that treatment with beta-amyloid group at a dose of 100 mg/kg marshmallow extract increased behavioral indices in passive avoidance memory test, compared to sham group(P In this study, likely reducing the complications, caused by the antioxidant properties and the effect of the inhibitory acetylcholinesterase enzyme of the compounds of this plant, such as quercetin, camphorol, tannin, lecithin, pectin, sterol and coumarin, are related.