Induction and Morpho-Ultrastructural Analysis of Organogenic Calli of a Wild Passionfruit

This work studied a new protocol for organogenic calli induction and characterization of the morphology and ultrastructure of callogenesis in leaf explants of Passiflora gibertii N. E. Brown, a native passion fruit species from Brazil. Calli induction was performed in different growth conditions (light and dark), different MS medium salt concentrations (MS and MS half strength) and the presence or absence of coconut water. The leaf explants maintained in the dark were more responsive to bud formation. In order to reduce spending on in vitro culture, the most suitable induction medium for P. gibertii organogenesis could, therefore be the MS half strength salt concentration medium maintained in the dark. The addition of coconut water to the culture medium was essential for both calli induction and bud formation. The morphological and ultrastructural features of the organogenic calli were isodiametric cells, characterized by an organized cellular system, nucleus with prominent nucleoli, presence of starch grains and dense cytoplasm rich in endoplasmic reticulum. The scanning electron microscopy demonstrated that buds were present on these calli.

Therapeutic effects of basic fibroblast growth factor on morphological features of hippocampal neurons in hyperbilirubinemia rats / 第三军医大学学报

Objective To observe the morphological damages of hyperbilirubinemia on rat central nervous system, and evaluate the therapeutic effects of different routes of basic fibroblast growth factor (bFGF) administration. Methods Totally 90 Wistar rats were inflicted to hyperbilirubinemia models and then divided randomly into 3 groups:untreated group (BG),treated-1 group (T_ 1 G), treated-2 group (T_ 2 G), and another 30 rats served as control group (CG). bFGF injection were given at 30 min, 1, 3, 5 and 7 d by abdominal cavity (T_ 1 G,) and cranial cavity (T_ 2 G). GAP-43 expression levels and the micro-morphological features were observed with immunohistochemical assay and transmission electron microscopy respectively at 2 nd, 8 st, 28 st and 60 st day. Results ①Hyperbilirubinemia rat model was verified by gross and microscopic observation, bilirubin concentrations in the plasma and brain.②Compared to CG, the expression level of GAP-43 was significantly up-regulated in BG, T_ 1 G and T_ 2 G, especially in the later 2 groups (P

Effect of Splint and Nd-YAG Laser in Microsurgical Reanastomosis of Rabbit Fallopian Tube / 대한산부인과학회잡지

To study tubal adhesion, tubal patency and histologic difference under light, electronic microcopy in a site of anastomosis, authors performed three anastomosis surgery in rabbit fallopian tube;1-layer and 2-layer anastomosis in splint-not-used group(group 1) and in splint-used group(group 2) and laser anastomosis in splint-used group(group 3). 10 rabbits were used in each group, therefore the total number of experimental rabbits in 3 groups were 30. The results were as follows; 1. The degree of gross adhesion in group II was significantly high as compared with other groups but there was no difference between left and right tube in the degree of adh- esion in each group(Table 1). 2. The incidence of tubal patency in group I was significantly high(89%) as compared with group I(44%). Especially, the incidence of tubal patency in group III was significantly high(100%) but there was no difference between left and right tube in incidence of tubal patency in each group. 3. Inflammatory cell infiltration appeared in each group on optical microscopic examin- ation. Especially, fibrosis and inflammatory cell infiltration appeared more in group II but there was no statistically significant difference. And there was no significant difference between left and right tube in each group. 4. Transmission electron microscopic examination of group I, as compared with normal control group, showed increase of microvilli and secretory granules and decrease in size of epithelial cell. Epithelial cell was morphologically transformed but maintained the original structure comparatively. TEM examination of group II, as compared with normal control group, showed decrease of microvilli and secretory granules and flattening of epithelial cell. It showed that epithelial cell vanished in it's original structure. TEM examination of group III, as compared with normal control group, showed decrease of microvilli and increase of secretory granules and morphological transformation of epithelial cell. Group III showed the resemblence to normal control group. From the above results, in reversal tuboplasty and tubal factor infertility, it is consi- dered that simple splint-used anastomosis or splint-used anastomosis with Nd-YAG laser will improve the successful rate of tubal anastomosis.

An ultrastructural observation of corneal collagen matrix of rabbit in the different time after death / 中国法医学杂志

Objective To study the relationship between the ultrastructural changes of corneal matrix collagen fibrils diameter and the postmortem interval.Methods Twenty-eight rabbits were killed by the method of air embolism and the samples of cornea were separately cut down in 0,6,12,18,24,48 and 72h after death.The ultrastructure of the collagen diameter was observed by transmission electro microscopy(TEM)and the 4 parameters of area(Y1),perimeter(Y2),average-diameter(Y3)and mean-diameter(Y4)were measured by a computer image technique and analyzed by Excel 2000 and SPSS 10.0 software.Results The 4 parameters of Y1,Y2,Y3 and Y4 were respectively increased from 1 131?53nm to 1 628?26nm,from 132.8?23nm to167.5nm,from 38nm to 45nm and from 37.71?6nm to 44.89?5nm within 72 hours after the death.Conclusion The corneal matrix collagen diameter increase regularly with the postmortem interval in 72h after death,and the parameters of Y1,Y2,Y3 and Y4 could be used as a new reference mark for timing the postmortem interval after death.