年龄

Coincident biotite 40Ar/39Ar ages yield in rocks in the south of Yadong and in the high-pressure granulite shows that on the section of Yadong-ZhergerLa, rocks were cooled to 320℃contemporarily.

在亚东县城以南的两处花岗质片麻岩中，锆石U-Pb年龄分别为1149和474 Ma，为原岩和泛非变质事件的年龄，黑云母单次全熔40Ar/39Ar年龄为11.3和11.0 Ma，磷灰石裂变径迹年龄分别为7和8 Ma。

We reported increases in locomotor activity with administration of ketamine in 22-, 35-, and 50-day-old mice and showed that the effects of ketamine diminish with age.

结果表明：使用氯胺酮可增加22、35和50日龄小鼠的运动器官的敏捷性，并证明了氯胺酮的作用随年龄的增长而降低；使用氯胺酮所导致的旋转与年龄的变化有关，但站立的减少与年龄无关，这种减少不依赖于小鼠的年龄

Screening methods currently used for Down vary in sensitivity, which is 30% for maternal age alone, 60% to 70% for maternal age plus maternal blood-testing in the second trimester, 75% for maternal age plus first-trimester fetal nuchal translucency scanning, and 85% for maternal age plus fetal nuchal translucency plus maternal-blood analysis at 11 to 14 weeks.

最近用於预测唐氏症的筛检方法在敏感度方面变化很大，仅考虑母亲的年龄，敏感度为30%；考虑母亲的年龄以及母亲在怀孕四至六个月的血液检查，敏感度为60%-70%；考虑母亲的年龄以及胎儿前三个月的颈背透明度扫描，敏感度为75%；考虑母亲的年龄、胎儿颈背透明度以及怀孕11至14周母亲的血液检测，敏感度为85%。

The mineraliztion is later than the activity of the magmas. And the deposits are formed in early Yanshan epoch, just after the collision of the continents and the orogenesis.

综合矿床的成矿年龄和与其有空间关系的岩体的成岩年龄可以看出，成矿年龄不同程度地小于成岩年龄，表明矿床形成于燕山早期，稍滞后于造山带陆-陆碰撞和陆内造山作用。

objective to determine the menarche age among female students and the relation between body fat and menarche in anhui province to provide theoretical basis for adopting intervention measure and carrying out health education.methods probability unit regression were used to calculate mmas in 3 000 girls aged 9～18 years old,who were selected from 3 areas in 2005.results mmas were 12.76 and 13.11 years old for urban and rural girls respectively.the youngest age was 10.the menarche age was significantly,related with bmi sebum thickness of abdomen,sebum thickness of shoulder blade and the upper arm.conclusion there was significant relationship between menarche age and body fat.menarche age showed an ahead trend in han national students in anhui province.sex eduction should be conducted in advance,and it was important to strengthen sex education in adolescent.

目的 了解安徽省女生月经初潮及初潮前后体脂变化情况，为采取干预措施和健康教育提供理论依据。方法按照2005年全国学生体质调研要求，采用分层整群抽样方法，对安徽省南、中、北3个地区城乡9～18岁中小学女生3000人进行调查，并测量体质指数、腹部皮脂厚度、上臂皮脂厚度和肩胛下皮脂厚度4项指标。结果城市女生半数月经初潮平均年龄为12.76岁，农村女生13.11岁，城乡最小月经初潮年龄均为10岁。体质指数、腹部皮脂厚度、上臂皮脂厚度和肩胛下皮脂厚度4项指标均值来潮组均大于未来潮组，差异有统计学意义，p.01。结论月经初潮年龄与体脂因素关系密切；安徽省汉族学生月经初潮年龄呈现提前趋势，性教育应提前，加强青春期性教育尤为重要。

It was suggested that aging did not only influence diastolic filling period, but also influence STI. 3. With increasing age, whether at rest or during exercice, fractional shortening of minor semiaxis, mean velocity of circumferential fiber shortening, cardiac index and ejection fraction did not change, but immediately post pacing, PEP prolonged and PEP/ LVET increased in elderly group and did not change in young group. It was suggested that STI was sensitivity in detecting systolic function of LV. 4. There was a good correlation between aging and decreased compliance and diastolic function of left ventricle which was manifested by a reduction of early diastolic peak folw velocity, time-velocity integral of early diastole, 1/3 filling fraction (1/3FF)(r=-0.958,-0.875 and -0.937, P＜0.01～0.001) and a significant compansatory increase in peak flow velocity of atrial contraction, time-velocity integral of atrial contraction, the ratio between APFV and EPFV and the ratio of ATVI and Total TVI (r=0.958, 0.956, 0.966 and 0.986, P＜0.001) and the prolongation of Dec T and RFP with increasing age. It was particularly true for the subgroups above the age of 50 years.

静息状态下收缩时间间期与年龄无相关性，负荷后即刻，老年组射血前期延长(P＜0.05)，射血前期与射血期比值加大(P＜0.05)，青年组无变化，提示年龄因素亦影响STI，但由于静息状态下得到代偿，STI变化往往表现不明显。3、静息及负荷状态左室短轴缩短率、平均周径缩短率、心指数及射血分数均不随年龄增长而变化，而负荷后即刻老年组PEF延长，PEP/LVET加大，提示STI是检测左室收缩功能的敏感指标。4、随年龄增长，心房收缩期充盈峰值流速、流速积分、充盈分数及心房收缩期与舒张早期充盈峰值流速之比值显著增高(r＝0.958、0.956、0.986及0.966，P均＜0.001)，舒张早期充盈峰值流速及流速积分、1/3充盈分数(1/3FF)下降(r＝-0.958、-0.875及-0.937，P＜0.01～0.001)。

The age structure of a population is the number of individuals in each age class expressed as a ratio, and is usually displayed nor contracting nor contracting will have a stationary age distribution.

年龄和时期结构种群的年龄结构是每一年龄阶段个体数目的比率，通常以年龄金字塔图来表示。

Bamboo variation ofmicrodensity of all age-degree and all height bamboo from bamboo green tobamboo yellow as follows:The downtrend ladder of microdensity the firststage from bamboo green to bamboo yellow is relatively large,normally at theplace 0.35 from bamboo hull(the thickness of from bamboo hull to bambooyellow is 1)micro-density downtrend ladder begin to get smaller,variancerange of microdensity is smaller.When reaching near bamboo yellow area,microdensity reaches its minimum value,and when reaching bamboo yellowsection density increase rapidly,the minimum density of bamboo is only 50% orless of maximum density.Bamboo yellow is comprised of stone cells whichhave thick cell wall,so its density is high,normally 50% to 100% more thanminimum density.Bamboo yellow′s lay thickness is thin,normally the samethickness for all age-degree and all height bamboo,about 0.8mm.From 1 age-degree bamboo to 2 age-degree bamboo during growth,the increase of averagedensity is mainly in bamboo pulp section,from 3 age-degree bamboo to 4 age-degree bamboo,the decrease of average density is mainly decrease in the pulpsection.Same age,same height,the less the density ladder of bamboo radialthickness,the higher the mechanical strength.

所有年龄所有高度的竹材微密度从竹青到竹黄对材性变异规律如下：从竹青到竹黄开始下降梯度较大，一般到相对竹皮距离0.35左右处(整个竹壁厚度为1)，竹材微密度下降梯度减小，微密度的变化范围变小，到近竹黄处，微密度达最小值，而后到竹黄部位密度大幅上升，竹材最小密度一般只有最大密度的50％或更低，竹黄由厚壁的石细胞组成，所以密度较大，一般比最小密度增大约50％-100％，厚度较薄，不同年龄不同高度竹材的竹黄厚度相差无几，约在0.8mm左右；竹材从1度竹到2度竹生长过程中，平均密度的增长主要发生在竹肉部分，从3度竹到4度竹生长过程中，平均密度的下降主要发生在竹肉部分，同一年龄同一高度，竹壁厚径向的密度梯度越小，力学强度越高，随着年龄的增大，密度梯度越来越小(1度竹除外)，随着高度增加，密度梯度越来越大。

The age structure of natural clonal population of Zoysia japonlca is studied by generational and morphological methods. The results show that if the relationship between age and tiller? s morphology has been found, the morphological method is better because it can show the seasonal change of age structure.

采用世代、形态2种方法对野生结缕草种群的年龄结构进行了研究，发现如果在获得关于分蘖形态与年龄相关的较为准确资料的基础之上，用形态方法划分结缕草无性系年龄结构更能反映出种群年龄构成的季节性动态。

Participants and methods 1、All participants were diagnosed with NAFLD byabdominal ultrasonography in lst affiliated hospital of JI NAN University frommay 2006 to march 2007. 2、All participants had no history of viral hepatitis orexcessive drinking(alcohol intake less than 140g per week for male and 70g perweek for female). 3、Detail history, anthropometrical parameters (height,weight,waistline and hipline). A B-mode ultrasonic examination was performed todetermine the liver fat content and participants were divided into the following threegroups based on their liver fat content: mild fatty degeneration group, moderate fattydegeneration group,severe fatty degeneration group.

对象与方法1、本研究以2006年9月至2007年3月在暨南大学附属第一医院内分泌科门诊、消化科门诊和体检中心初诊为NAFLD者为研究对象，总共有NAFLD组病人405例，男性232例，女性173例，年龄在20-80岁之间，平均年龄56.6±6.89岁，按B超的检查结果NAFLD组病人分为轻度NAFLD组、中度NAFLD组、重度NAFLD组，各组性别构成和年龄差异无统计学意义。2、选择年龄在20-80岁之间的健康体检者并行B超检查排除NAFLD者为对照组，共119例。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

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