Yucatan Pig: An Optimal Hairless Model for a True Random Cutaneous Flap

Porcine models have been used extensively for skin flap research because of the established similarity between the cutaneous blood supply of the swine and humans. The Yucatan minipig provides an excellent model for researching the properties of random cutaneous flaps, offering several advantages over other breeds of swine. In this study, a total of 67 random cutaneous dorsal flank flaps measuring 4 × 14 cm were raised on nine Yucatan minipigs. The mean survival length (10.03 ± 1.60 cm) of the nondelayed flaps was greater than others reported in the literature. The well-defined plane between the subcutaneous tissue and the panniculus carnosus facilitated flap elevation consistently above the level of the panniculus carnosus thereby ensuring the creation of a true random cutaneous flap. Furthermore, the hairless nature of the skin, particularly beneficial in studying chemical peels, permits easy visualization and monitoring of any external skin changes. These advantages make the Yucatan minipig a more desirable alternative to other breeds of swine for use in skin flap research.     

青皮对大鼠脑梗死灶周边区葡萄糖利用率的影响

目的观察青皮升压治疗对大鼠局灶性脑缺血再灌注模型皮质下梗死灶周边葡萄糖利用率(LCGU)的影响。方法将16只大鼠随机分为对照组、青皮升压组,采用大鼠大脑中动脉闭塞(MCAO)再灌注模型,在缺血2h用青皮升高血压20%~30%,缺血24h后处死大鼠,采用定量放射自显影技术测定2组缺血侧大脑半球皮质下梗死灶周边区及对侧大脑半球同源区的LCGU。结果对照组、青皮升压组皮质下梗死灶周边的LCGU分别为(250±39.3)μmol·100g-1·min-1,(182.7±23.03)μmol·100g-1·min-1,明显高于对侧大脑半球同源区(170.4±22.5)μmol·100g-1·min-1,(134.1±29.9)μmol·100g-1·min-1(P<0.05);青皮组皮质下梗死灶周边的LCGU明显低于对照组(P<0.05)。结论在皮质下梗死灶周边存在葡萄糖利用率增高区,青皮可改善皮质下脑梗死灶周边无氧糖酵解。     

褐藻中高相对分子质量褐藻多酚的抗氧化活性研究

目的　评价鼠尾藻和海黍子两种褐藻中高相对分子质量褐藻多酚的抗氧化活性。方法　分别利用 3种体系 ,通过对羟自由基 (· OH)、超氧阴离子 ( O÷2 )和 1,1-二苯基 - 2 -苦味肼基自由基 ( DPPH· )清除效率来评价其抗氧化活性。结果　两种褐藻中高相对分子质量褐藻多酚对· OH、O÷2 和 DPPH·均有很高的清除效率 ,且效果相近。结论　鼠尾藻和海黍子两种褐藻中高相对分子质量褐藻多酚具有较强的抗氧化活性 ,是一类潜在的海洋生物天然抗氧化剂。     

绿茶及绿茶多酚抗羟自由基诱导的大鼠肝脂质过氧化作用

本研究采用Ｆｅ２＋，Ｈ２Ｏ２反应生成ＯＨ·诱导大鼠离体肝脏脂质过氧化反应体系，用ＧＴ和ＧＴＰ作为抗氧化剂观察对肝脂质过氧化的阻抑作用。随ＧＴ和ＧＴＰ浓度的升高对ＭＤＡ的抑制率分别为０．７７４～０．８９２，０．８１４～０．９７６，浓度与ＭＤＡ之间存在剂量效应关系。     

Comprehensive dietary evaluation of Italian primary school children: food consumption and intake of energy,nutrients and phenolic compounds

Abstract

Information on children’s diet including bioactive compounds is quite scarce. This observational study investigated the composition of the diet of children living in Parma (Italy; n?=?172, 8–10?years) using 3-day food records completed in winter and spring. Mean daily intakes of food groups, energy and nutrients were obtained using the national food database, while (poly)phenol contents were estimated from Phenol-Explorer or by specific literature searches. Food consumption, energy and nutrient intakes decreased in spring and were partially in line with national data. Adherence to the nutritional recommendations was not satisfied for the majority of nutrients. Main contributors to the phenolic intake were flavonoids (flavan-3-ols) and phenolic acids (hydroxycinnamic acids), while main dietary sources were fruit, chocolate-based products, vegetables, and tea & coffee (decaffeinated). This study provided the first comprehensive analysis of the nutritional composition of children’s diet. Future research should look at the health implications of dietary choices in children.     

茶多酚与亚硒酸钠联合对EBV抗原表达的抑制作用

用间接免疫荧光法测定Ｒａｊｉ细胞和Ｂ９５－８细胞ＥＢ病毒抗原的表达。结果显示无细胞毒浓度的茶多酚与亚硒酸钠联合对Ｒａｊｉ细胞ＥＢＶ－ＥＡ表达有显著的抑制作用,优于单纯茶多酚或亚硒酸钠的抑制作用。两药显示相互协同增效的作用 。抑制率与药物浓度相关;单纯茶多酚对Ｂ９５－８细胞ＥＢＶ－ＶＣＡ表达无抵制作用,但茶多酚能增强亚硒酸钠对Ｂ９５－８细胞ＥＢＶ－ＶＣＡ表达的抵制作用,抑制率随药物浓度的升高而升高。     

蘡Ao中分离的多酚化合物

目的分离鉴定蘡Ao地上部分的化学成分。方法通过硅胶柱色谱，Sephadex LH-20及制备HPLC方法分离，对其进行理化常数和光谱分析确定结构。结果自蘡Ao地上部分分离得到11个多酚化合物，均属首次分离。结论化合物1为新化合物，经鉴定其结构为3，5-二甲氧基-4-羟基苯丙醇-9-氧-β-D-吡喃葡萄糖苷。     

休克期削痂加复合植皮治疗大面积深度烧伤

目的　探讨休克期削痂加复合植皮治疗大面积深度烧伤的可行性。方法　对 15例烧伤面积(70 5± 19 2 ) %、深Ⅱ～Ⅲ度面积平均 (5 0 1± 2 0 5 ) %的患者采用休克期削痂加复合植皮 ,第一次手术时间是伤后 2 4～ 4 8h ,一次削痂面积约 (30 6± 9 3) % ,以神态、尿量、心率和中心静脉压 (centrevainpressure,CVP)为主要监护指标。结果　术中术后各监护指标在正常范围。治疗组病例全部治愈出院 ,与条件相似 16例休克期后削痂植皮患者对比 ,创面愈合天数缩短 12d左右。结论　休克期削痂加复合植皮治疗大面积深度烧伤是可行的。     

葡萄籽提取物的质量标准

概述了国际市场上葡萄籽提取物的几种质量标准,综合分析了中国葡萄籽提取物各生产厂家的质量标准情况。鉴于国内还没有葡萄籽提取物质量的国家标准或行业标准,笔者根据多年的葡萄籽提取物研究、生产、出口情况,结合相关文献,提出了建立2种规格质量标准的观点:多酚含量大于95%、单体含量大于10%作为高品质葡萄籽提取物的质量标准;原花青素值大于95、单体含量大于6%作为一般品质葡萄籽提取物的质量标准。