辽西地区汉族成人的体型特征

目的:应用Heath-Carter法分析辽西地区汉族成人的体型特征,为体质人类学补充必要的资料。方法:于2002-09随机选择辽西地区20～82岁的汉族成人1002名(男490名,女512名)为测量对象。从20岁起,每5岁为一组,55岁以上为1个年龄组;每个年龄组按性别又分男、女两个小组,每小组测量人数不低于30名。由专人负责按Heath-Carter体型法进行指标测量和计算。10项测量指标分别是身高、体质量、上臂紧张围、小腿围、肱骨和股骨内外上髁间径、肱三头肌皮褶厚度、肩胛下皮褶厚度、髂前上棘皮褶厚度、腓肠肌皮褶厚度,测试数据按年龄、性别在微机中建立数据库。依次计算出各年龄组的内因子、中因子、外因子、体型图上的X,Y坐标值、身高体质量比、体型位置均数、两体型点间距离、体脂率和各类体型分布频数等。结果:1002名的各项指标均被测量,全部进入结果分析。①城市男女在内因子值(代表脂肪发育程度)方面占有明显的优势,中因子值(代表骨骼肌肉发育程度)方面和外因子值(代表身材相对瘦削程度)方面,城乡两组呈交替领先局面。提示汉族成人城市男女与农村男女相比,脂肪较发达,骨骼肌肉发育中等,身体线性度较差。②男性体型分布主要集中在偏中胚层的内胚层体型(53.5%),均衡内胚层体型(13.9%),偏外胚层的内胚层体型(9.1%),女性体型分布主要集中在偏中胚层的内胚层体型(62.8%),偏外胚层的内胚层体型(16.3%),均衡内胚层体型(13.7%)。体型频数分布提示汉族成年男女体型分布均较集中,以女性最为突出。③男女间体型相比,只有20～24岁和40～44岁年龄组男女间差异有显著性意义(P<0.05),其余各组差异无显著性意义。提示20～24岁为青春期的发育后期,男性得到充分的发育,而女性由于发育较早,发育已经停滞或缓慢。40～44岁女性更容易有脂肪沉积,而影响到其他有关体型的参数,出现男女差异。④辽西汉族城市成年人与农村成年人体型比较,内因子值城市成年男女均明显高于农村成年男女,中因子值和外因子值城乡较为接近,差异无显著性意义。结论:辽西地区城市成年男女骨骼、肌肉中等发达,体脂较多,身体线性度较差;农村成年男女,骨骼、肌肉较发达,体脂少于城市成人,身体线性度尚佳。     

In vitro and in vivo study of the efficacy of a new sebum control essence

Background

People with oily skin often suffer from skin problems such as oily face, blackheads, acne, and enlarged pores. It is necessary to regulate oily skin with skin care products.

Aims

To develop an effective sebum control essence to reduce oiliness of skin.

Methods

The composition of the essence was designed in consideration of different oil control mechanism targets. The skin irritation was assessed in 30 volunteers by a single application close patch test. The efficacy of the essence was evaluated by in vitro experiment, short- and long-term clinical trials with over 60 volunteers.

Results

The results of both in vitro and clinical trials showed that the essence had significant oil control and moisturizing effect, the skin oil content decreased by 21.8% within 8 h and 30.05% after 28 days, which indicated that the essence could achieve rapid and persistent sebum control efficacy. In addition, the essence could relieve the problems of enlarged pores, blackheads and whiteheads in long-term use.

Conclusions

The essence developed in this study can alleviate the problems of oily skin from many aspects, and achieve an excellent effect in oily skin regulation. It is suitable for a daily application in oily skin regulation.     

Desmoplastic Fibroblastoma: A Light and Ultrastructural Description of Two Cases

The authors report 2 cases of collagenous fibroma in which ultrastructural analysis revealed the presence of fibronexus junctions, markers of myofibroblastic differentiation, never described in this rare lesion before. The tumors occurred in the trapezius muscle and in the right arms of a 41-year-old and a 25-year-old man. They were both intramuscular and showed sharp edges. Grossly, the excised masses were whitish and firm. Microscopically, they were both composed of stellate or spindle-shaped cells separated by a collagenous hypovascular and focally myxoid stroma. Mitotic figures and necrotic areas were not identified. Immunohistochemistry showed positivity for vimentin and focal positivity for smooth and human muscle actin, and flow cytometry showed the tumoral cells to be diploid.