查询词典 grave marker

The new technique reduced the distance ladder to three "rungs":(1) The distance to galaxy NGC4258 is measured using straightforward geometry and Kepler's laws;(2)Cepheids in six more distant galaxies are used to calibrate the luminosity of Type Ia supernovae;(3) The Hubble constant is measured by observing a brighter milepost marker, Type Ia supernovae, in more distant galaxies hundreds of millions of light-years away, embedded in the expanding universe.

这种新技巧简化了距离跳跃为三个"阶梯"：1、星系NGC 4258的距离采用开普勒定律和简单直接的几何方法精确测量；2、在6个更远的星系中的造父变星用来校准Ia超新星的光度；3、深嵌于数亿光年外的膨胀宇宙中的星系中的Ia超新星——一种遥远而明亮的量天尺，被用于精确测定哈勃常数。

Measuring the resistance spectrum of different rice varieties to bacterial leaf blight, it was beneficial to direct utilization of resistant varieties and improvement of rice resistance to BLB through molecular marker-assisted selection or genetic engineering.

测定不同水稻品种对白叶枯病的抗谱，有助于抗病品种的直接利用和通过分子标记辅助选择或基因工程培育抗病品种。

Based on the maximum likelihood analysis principle for dynamic trait QTL mapping, selecting three orders Legendre polynomial as sub-model, the effects of the individual number, the frequency of test day, the marker density and heritability on detecting power are investigated by Monte-Carlo simulation.

以远交设计群体为例，在推导出动态性状基因定位的似然法分析过程的基础上，选择3阶多项式为子模型，采用Monte Carlo方法模拟研究了不同个体数、测定日频数、标记密度和QTL遗传贡献率对两种分析方法检测QTL效率的影响。

In order to enhance its resistance to bacterial blightand lepidopteran such as leaffolder, striped stem borer and yellow stem borer etc, we intergessed Xa21 and Bt genes into the genetic background of 93-11 by backcross scheme, combining with molecular marker-assisted selection and phenotypic selection. Through three backcross and two self generations, eight families that have homozygous Xa21 and Bt genes were obtained in the BC3F3 families. Two families show higher recovery percentage of 93-11 even up to 90.59%.

为了进一步提高其对白叶枯病的抗性、同时增加其对水稻鳞翅目害虫（如稻纵卷叶螟、二化螟和三化螟等）抗性，利用常规回交育种方法和结合分子标记辅助选择将Xa21基因和Bt基因同时导入93-11中，在BC3F3家系中筛选到8个家系含纯合的Xa21基因和Bt基因，其中有两个家系与93-11比较其遗传背景的回复率很高，达到90.59%。

CAD(a highly specific marker for lignification)was induced at early stage ofincompatible interaction and the CAD activity result from CAD gene expression ac-tivated by JXO V and was regulated by Ca2+ and △pH.

这种CAD活性的上升并非源于白叶枯病菌对其的直接激活，而源于对其基因表达的诱导，且CAD基因的表达要受到Ca2+信号的调节。

ANOVA,regression method and likelihood ratio test can be applied in single-marker mapping.

单一标记分析法可以采用方差分析、回归分析或似然比检验的方法分析。

There was a low expression level of CD127, the marker of exhausted lymphocytes, in the LILs compared to the PBLs.

此外，我们观察到：相较於周边血淋巴球，肝脏浸润淋巴球的CD127表现，有明显降低的现象。

In this article, shrinkage estimation method for multiple-marker analysis and for mapping multiple quantitative trait loci was reviewed.

本文综述了多标记分析和多QTL定位的压缩估计方法。

The advantage of using the index is attributed to the fact that it does not depend on marker allele frequencies across loci.

该指数的特性是它不依赖于标记基因的频率。

Taking advantage of a rDNA mutant,rdna-A3,which is of paromomycin resistance marker and has replication predominance over wild type r dna+,we demonstrated that among 10 000 copies of rDNA in the old macronucleus no ne could "leak" into the developing new macromucleus during conjugation.

本文以1种具有强大复制优势而且是抗药性的rDNA分子，rdna-A3，为指标，证明在接合过程中旧大核内上万个rDNA分子没有1个能进入新大核，从而在基因分子水平上证明旧大核的退化是极为彻底的。

Objective To investigate the relationship between ovum fertilization rate and sperm morphology, acrosome reaction in IVF and to explore the influence of parameters of sperm on fertilization rate.

目的 研究体外受精(in vitro fertilization，IVF)中精子形态、顶体反应与卵子受精率之间的关系，分析精子各参数在IVF受精率方面的参考意义。

A: I hear Mr. White wants to run for the Presidency!

我听说怀特先生要参加总统竞选！