The antibiotic tetracycline cause gray teeth in children whose teeth are still developing.

Objective : To evaluate the effect and safety of semiconductor laser bleaching on tetracycline-stained vital teeth.

目的: 评价半导体激光漂白四环素牙的临床效果和安全性.

Tetracycline is indicated in such cases.

这种病例四环素显示很有效.

He was treated with metronidazole for three weeks per os and tetracycline for four months.

其病程分期属于前淋巴瘤期的晚期.

Microspore abortion occurred after the tetrad formation.

小孢子败育发生在四分体形成以后.

The tapetum begins to vary at the stage of tetrad with the cytoplasm anther cell.

小孢子孢原为多细胞,小孢子母细胞减数分裂产生四面体型的小孢子四分体.

Super-microspore happened in the 5 % ~30 % or more tetrads and its formation was directly concerned with B-chromosome.

四分体中额外小孢子的形成与B - 染色体直接有关,其频率为5%～30%或更高.

The content of sulfoether in catalytic cracking diesel oil was determined by tetraethyl-lead potentiometric titration method.

应用四乙酸铅电位滴定法测定催化裂化柴油中硫醚硫的含量,电位稳定,终点电位突跃明显,结果可靠.

Historically, the primary source of lead emissions has been the result tetraethyl lead additives to gasoline.

从历史的角度讲, 铅挥发的最初来源是添加到汽油中的四乙基铅.

Chapter 3 introduces the variable time-step scheme in combination with solution-mesh refinement on unstructured tetrahedral mesh.

第三章介绍结合变时 步法 之非结构性可调适四面体网格.

An algorithm for generating three-dimensional tetrahedral mesh for simulation of brain deformation is presented.

本文提出了一种用于模拟脑组织变形的三维四面体网格划分算法.

The Rubik's is a toy in the shape of a tetrahedron.

魔方是个四面体的玩具.

Tetrahedron sandstone statues tower, the existing four, descending, were folded pyramid.

四面体砂岩造像塔, 现存4块, 由大到小,呈塔形叠起.

The internal structure of silica has a pyramid ( tetrahedron ) unit .

硅的内部结构是一个 四面体.

The catalysis of big pore strong acid resin for 1, 4-butanediol dehydration to tetrahydrofuran is investigated.

考察了大孔强酸性树脂对1, 4 丁二醇 脱水制四氢呋喃的催化作用.

Removal alcohol from crude tetrahydrofuran, formation principle of peroxidate and antioxidation technique were introduced.

介绍了粗品四氢呋喃的除醇技术, 过氧化物的生成机理与抗氧化技术.

The catalysis of big pore strong acid resin for 1,4-butanediol dehydration to tetrahydrofuran is investigated.

考察了大孔强酸性树脂对1,4 丁二醇 脱水制四氢呋喃的催化作用.

Methods: The mobile was Tetrahydrofuran-acidic water, UV detector was used to quantify and determine Sudan I.

方法: 以四氢呋喃 - 酸性水溶液为流动相, 紫外检测器测定.

The new synthetic route for tetrahydrofuran via direct oxidation of butadiene was introduced.

介绍以丁二烯为起始原料、经乙烯基环氧乙烷制备四氢呋喃的新工艺.

Tetrahymena is applied for detecting toxicity, apoptosis and water quality monitoring at present.

目前已作为标准检测生物被广泛应用于毒性检测 、 细胞凋亡和水质检测中.

Clinic research of one stage surgical treatment of Tetralogy of Fallot in infants.

与婴儿法洛四联症一期根治的临床研究>>相似的文献.