In our previous studies,grey satellite foci were found in the front of heads of pterygia.This research was designed to investigate the ultramicrostructure and clinical implications of these satellite foci.The satellit...In our previous studies,grey satellite foci were found in the front of heads of pterygia.This research was designed to investigate the ultramicrostructure and clinical implications of these satellite foci.The satellite foci were observed and counted under slit lamp biomicroscope.The patients with eye pterygia were divided into groups in terms of occupation,sex,age,length of history,grade of congestion,and size of the heads.The SPSS 13.0 software was used for statistical analysis.The cap areas and satellite foci were ultramicrostructurally examined.Among the total 62 eyes with pterygium,satellite foci were found in 34.The overall incidence of satellite foci was 54.8%.There were no significant differences in incidence among the subjects of different sex,age,and length of history.There were significant differences in incidence among the patients of different occupation,grades of congestion,and size of heads.Higher grades of congestion,outdoor occupations and larger pterygium heads were associated with higher incidence of satellite foci.High grades of congestion and bigger heads were also correlated with the number of satellite foci.Length of history bore no correlation with number of satellite foci.Histologically,the components of the cap areas and the foci were identical,with both consisting of mass of active fibroblasts.The activated fibroblasts existed in the natural tissue planes between Bowman’s layer and basal cell layer.The fibroblasts in the satellite foci and the cap areas of a pterygium show some features of tumor cells and may play a vital role in the development and progression of a pterygium.The presence and amount of satellite foci around a pterygium can be used as an indicator for the speed of its growth.展开更多
Ulomoides dermestoides(Chevrolat)(Coleoptera: Tenebrionidae) is one of the most notorious pests in northeastern China. We examined microtrichia on the thorax, elytra and abdomen of U. dermestoides using scanning elect...Ulomoides dermestoides(Chevrolat)(Coleoptera: Tenebrionidae) is one of the most notorious pests in northeastern China. We examined microtrichia on the thorax, elytra and abdomen of U. dermestoides using scanning electron microscopy and recorded their conformations(size, shape and insertion method) and distributions(length, width and location). Possible functions of the microtrichia were(1) stridulation: microtrichia on the inner surface of the elytra interacted with microtrichia on the dorsoventral axis of the thorax or on the costal vein of the hind wing;(2) to increase friction: at the major surface on the middle of the abdominal tergum, hind-wings, inner surface of the medial edge of the elytra and the posterior end of the elytra;(3) protection: the microtrichia covering the posterior face of the abdomen conserved water in the body and protected the body from damage; and(4) sensing organ: the special shape of the microtrichia on the nervation near the vannal fold of the hind wing, the anteriometapleuron on the metathorax, and the posterior field of the abdomen could perceive the environment. In conclusion, the size and shape of the microtrichia are tightly related to their functions, which may have evolved with the beetles' lifestyle.展开更多
文摘In our previous studies,grey satellite foci were found in the front of heads of pterygia.This research was designed to investigate the ultramicrostructure and clinical implications of these satellite foci.The satellite foci were observed and counted under slit lamp biomicroscope.The patients with eye pterygia were divided into groups in terms of occupation,sex,age,length of history,grade of congestion,and size of the heads.The SPSS 13.0 software was used for statistical analysis.The cap areas and satellite foci were ultramicrostructurally examined.Among the total 62 eyes with pterygium,satellite foci were found in 34.The overall incidence of satellite foci was 54.8%.There were no significant differences in incidence among the subjects of different sex,age,and length of history.There were significant differences in incidence among the patients of different occupation,grades of congestion,and size of heads.Higher grades of congestion,outdoor occupations and larger pterygium heads were associated with higher incidence of satellite foci.High grades of congestion and bigger heads were also correlated with the number of satellite foci.Length of history bore no correlation with number of satellite foci.Histologically,the components of the cap areas and the foci were identical,with both consisting of mass of active fibroblasts.The activated fibroblasts existed in the natural tissue planes between Bowman’s layer and basal cell layer.The fibroblasts in the satellite foci and the cap areas of a pterygium show some features of tumor cells and may play a vital role in the development and progression of a pterygium.The presence and amount of satellite foci around a pterygium can be used as an indicator for the speed of its growth.
基金supported by the National Natural Science Foundation of China(NSFC Grant No.31370649)
文摘Ulomoides dermestoides(Chevrolat)(Coleoptera: Tenebrionidae) is one of the most notorious pests in northeastern China. We examined microtrichia on the thorax, elytra and abdomen of U. dermestoides using scanning electron microscopy and recorded their conformations(size, shape and insertion method) and distributions(length, width and location). Possible functions of the microtrichia were(1) stridulation: microtrichia on the inner surface of the elytra interacted with microtrichia on the dorsoventral axis of the thorax or on the costal vein of the hind wing;(2) to increase friction: at the major surface on the middle of the abdominal tergum, hind-wings, inner surface of the medial edge of the elytra and the posterior end of the elytra;(3) protection: the microtrichia covering the posterior face of the abdomen conserved water in the body and protected the body from damage; and(4) sensing organ: the special shape of the microtrichia on the nervation near the vannal fold of the hind wing, the anteriometapleuron on the metathorax, and the posterior field of the abdomen could perceive the environment. In conclusion, the size and shape of the microtrichia are tightly related to their functions, which may have evolved with the beetles' lifestyle.
