垂体强化MRI 对垂体柄阻断综合征的诊断价值 及对垂体－靶腺功能损伤的评估意义

目的 分析垂体强化磁共振成像（MRI）在垂体柄阻断综合征中的诊断价值及对垂体- 靶腺功能 损伤的评估意义。方法 选取该院86 例垂体柄阻断综合征者为病例组,另选取50 例健康儿童和青少年为对照 组。根据病例组垂体MRI 表现,其中完全性垂体柄阻断者为A 组,部分性垂体柄阻断者为B 组。比较A 组、 B 组与对照组相关激素参数的水平,并分析MRI 表现与垂体- 靶腺功能损伤的关系。结果 病例组86 例患 者中垂体后叶正常4 例（4.65%）,体积变小16 例（18.60%）,发生异位56 例（65.12%）,缺失10 例（11.63%）。 A 组、B 组睾酮（T）、雌二醇（E2）、促黄体生成素（LH）等性激素水平较对照组均降低（P <0.05）,而A 组 T 水平较B 组降低（P <0.05）,而A、B 两组其他性激素水平的比较,差异无统计学意义（P >0.05）。A 组皮质 醇（COR）、促肾上腺皮质激素（ACTH）、游离甲状腺素（FT4）、促甲状腺激素（TSH）等激素的水平较 对照组、B 组均降低（P <0.05）;B 组COR 和FT4 的水平较对照组均降低（P <0.05）,而其他激素水平的比较, 差异无统计学意义（P >0.05）。A 组因垂体激素缺乏引起继发性肾上腺功能减退、甲状腺功能减退和中枢性 尿崩症的发生率较B 组升高（χ2=10.24、7.35 及9.35,均P <0.01）。结论 垂体强化MRI 能够有效诊断垂体 柄阻断综合征者垂体－靶腺功能损伤的状况,其在评估垂体柄阻断综合征垂体功能中具有较高的诊断价值。     

A fetal autopsy case of body stalk anomaly

Body stalk anomaly (BSA) is a sporadic polymalformative syndrome incompatible with extrauterine life. In utero detection of BSA by two-dimensional and three-dimensional ultrasonography and magnetic resonance imaging has been well documented. We herein describe a case of body stalk anomaly diagnosed at autopsy. The fetus had a large anterior midline abdominal wall defect with eventration of the visceral organs into the amnio-peritoneal sac and a completely absent umbilical cord. The associated anomalies included club foot, absent diaphragm, genitourinary, and gastrointestinal defects. The observed congenital anomalies supported the theory of embryonic dysgenesis as the etiologic factor. One of the major objectives in the performance of fetal autopsy is to be able to detect abnormalities that can have implications in future pregnancies. Despite the negligible familial recurrence rate of the broad spectrum of anomalies associated with this abdominal wall defect, the present case of fetal autopsy indeed delights to serve the living.     

Method for Manufacturing Corn Straw Cement-Based Composite and Its Physical Properties

This paper introduces an innovative method for making cement-based composites from corn straw plants, and investigates the strength, thermal conductivity, and hydration characteristics of the composites. Corn straw is a natural, renewable, and breathable thermal insulation composite that contains cellular sealed pores. Corn straw contains a large amount of soluble cellulosic sugar, which hinders the hydration reaction of Portland cement and affects the use of corn straw as a building material. In this study, a 3 wt.% siliceous solution was used for surface treatment of corn straw particles to prevent cellulosic sugar from affecting the hydration performance of Portland cement. The composition of added cement-based composite materials with treated corn straw at the dosage of 11–20 wt.% was investigated. The test results showed that the corn straw cement-based composite (CSCC) had an optimal thermal conductivity of 0.102–0.112 (W/(m·K)) and a minimum compressive strength of above 1 MPa. The hydration performance of four typical CSCCs was examined using XRD, SEM, and EDS. The experimental results of this study may help to increase the comprehensive utilization of corn straw. The manufacturing method of the composite materials is simple, effective, and convenient for popularization and application, and it provides a new important technical measure to solve the problem of high energy consumption in rural houses.     

离子色谱法检测玉米中钾钠镁钙铵的方法研究

<正>玉米中所含的许多矿物质都是人体重要的营养物质。如钠、钾可以调节细胞和血液的容量;钾还参与蛋白质、碳水化合物的代谢,帮助活化     

Natural Occurrence of Mycotoxin-Producing Fusaria in Market-Bought Peruvian Cereals: A Food Safety Threat for Andean Populations

Consumption of cereals contaminated by mycotoxins poses health risks. For instance, Fumonisins B, mainly produced by Fusarium verticillioides and Fusarium proliferatum, and the type B trichothecene deoxynivalenol, typically produced by Fusarium graminearum, are highly prevalent on cereal grains that are staples of many cultural diets and known to represent a toxic risk hazard. In Peru, corn and other cereals are frequently consumed on a daily basis under various forms, the majority of food grains being sold through traditional markets for direct consumption. Here, we surveyed mycotoxin contents of market-bought grain samples in order to assess the threat these mycotoxins might represent to Peruvian population, with a focus on corn. We found that nearly one sample of Peruvian corn out of six was contaminated with very high levels of Fumonisins, levels mostly ascribed to the presence of F. verticillioides. Extensive profiling of Peruvian corn kernels for fungal contaminants could provide elements to refine the potential risk associated with Fusarium toxins and help define adapted food safety standards.     

活性碳色谱法分离制备高F值寡肽混合物

比较了１８种颗粒及粉状活性碳吸附和解脱芳香族氨基酸的能力。找出了较适宜的活性碳品种、吸附条件和解脱溶液。显示了活性碳色谱法分离制备高Ｆ值寡肽混合物的有效性。测定了高Ｆ值寡肽混合物的氨基酸组成，计算出Ｆ值＞２０。并用ＨＰＬＣ测定了相对分子质量分布。     

玉米小麦制粉作业粉尘对肺功能的影响

对玉米和小麦制粉作业环境进行了劳动卫生调查,同时测定了158名接尘工人肺通气功能。制粉作业粉尘是含有机物97%,游离SiO_2含量<1%,5μm以下粒子占90%以上的单纯谷物粉尘。空气中粉尘浓度为10.0mg/m~3～53.7mg/m~3(G)。73%接尘工人出现肺功能异常。肺功能指标除VC外均较对照组下降。肺功能随接尘时间延长和粉尘浓度增高而下降。肺功能障碍以阻塞型为主占91%。反映小气道功能敏感的MMEF及FEF_(75～85)异常检出率为66%和61%。可见,单纯谷物粉尘对肺功能损害作用不容忽视。     

烟曲霉震颤素B的高效液相色谱检测方法的建立

介绍了一种简便、快捷的检测烟曲霉震颤素Ｂ的高效液相色谱（ＨＰＬＣ）检测方法，用三氯甲烷提取后直接进样，方法检出限为１．５～２．０ｐｇ，在２．５～４００ｐｇ范围内线性良好，方法回收率为８４．４％～１０９．３％     

金属桩银汞核在后牙牙体缺损修复中的应用

（1）目的 探讨金属桩银汞核在后牙残根残冠修复中的作用。（2）方法 选择粗细适宜的金属桩,粘固在预备好的根管内,用银汞包绕金属桩,形成银汞核,在银汞核上制作金属烤瓷冠。（3）结果 42颗后牙的残根残冠,经2年的随访观察,牙齿咬He正常,边缘密合,牙周情况良好。（4）结论 应用金属桩银汞核联合金属烤瓷冠修复后牙的残根残冠是一种理想而简便的修复方法。