搜索结果: 1-15 共查到“理学 Age”相关记录183条 . 查询时间(0.14 秒)
For the first time, molecules dating to the Stone Age have been revived in the lab.
中国地质大学科学技术发展院靳晓野, 李建威等, 资源学院/GPMR国家重点实验室. Economic Geology, 2021, Calcite U-Pb dating unravels the age and hydrothermal history of the giant Shuiyindong Carlin-type gold deposit in the Golden Triangle, South China
放射性；同位素；实验室；卡林型；金矿床
2021/10/14
近日，矿床学领域权威期刊《Economic Geology》刊发我校资源学院和GPMR国家重点实验室李建威教授团队和昆士兰大学放射性同位素实验室合作的研究成果——首次利用LA-(MC)-ICPMS方解石U-Pb测年法精确确定了卡林型金矿床的形成时代。这是该团队继卡林型金矿成矿流体来源与演化示踪研究“Noble gases fingerprint the source and evolution o...
World's oldest DNA reveals how ice age mammoths evolved（图）
World oldest DNA ice age mammoths evolved
2021/3/5
An international research team has sequenced DNA recovered from mammoth remains that are up to 1.2 million years old. The results are published in the journal Nature.The analyses,...
Sea ice kept oxygen from reaching deep ocean during last ice age, study finds（图）
Sea ice oxygen reaching deep ocean during ice age
2021/3/5
Extensive sea ice covered the world's oceans during the last ice age, preventing oxygen from penetrating into deep ocean waters and complicating the relationship between oxygen and carbon, a new study...
New view of nature's oldest light adds fresh twist to debate over universe's age（图）
New view nature oldest light adds fresh twist debate over universe's age
2020/7/31
From a mountain high in Chile's Atacama Desert, astronomers at the U.S. National Science Foundation's Atacama Cosmology Telescope (ACT) have taken a fresh look at the oldest light in th...
Effect of Housing System and Age of Laying Hens on Eggshell Quality, Microbial Contamination, and Penetration of Microorganisms into Eggs
antimicrobial effect gastrointestinal tract pathogens palm oil lauric acid capric acid
2018/3/5
Increasing antibiotic resistance has led to a ban on antibiotic use in feed additives in the EU. Therefore, new
non-antibiotic, pathogen-inhibiting agents are urgently needed. Inhibitory effects of e...
Gender and Age Effects on the Expression of Genes Related to Lipid Metabolism in Broiler’s Liver
apolipoprotein lipogenesis lipolysis
2018/3/5
Two experiments were conducted to assess gender (Experiment 1) and age (Experiment 2) effects on the
expression of genes related to lipid metabolism in broiler chickens. The expression of fatty acid ...
Zircon U-Pb age, Trace Element, and Hf Isotopic Compositions of Nordmarkite in the Lizhuang Rare Earth Element Deposit in the Western Margin of the Yangtze Block
nordmarkite REE deposit Hf isotopic characteristics of zircon Lizhuang
2018/4/10
The Mianning–Dechang (MD) rare earth element (REE) belt, located in the northern Kangdian axis (KDA) in the western margin of the Yangtze platform, is one of the most economically significant REE mine...
Ethnic and genetic factors of iron status in women of reproductive age
breastfeeding ethnicity genetic factors hemochromatosis iron overload iron status pregnancy women of reproductive age
2018/11/21
Background: African Americans are at increased risk of iron deficiency (ID) but also have higher serum ferritin (SF) concentrations than those of the general population. The Hemochromatosis and Iron O...
Massive Antarctic Volcanic Eruptions Linked to Abrupt Southern Hemisphere Climate Changes Near the End of the Last Ice Age（图）
Massive Antarctic Volcanic Eruptions Southern Hemisphere Climate Changes Last Ice Age
2017/9/20
New findings published today in the Proceedings of the National Academy of Sciences of the United States of America (PNAS) by Desert Research Institute (DRI) Professor Joseph R. McConnell, Ph.D., and ...
Vitamin D prenatal programming of childhood metabolomics profiles at age 3 y
airway inflammation, metabolomics, polyunsaturated fatty acids, prenatal programming, vitamin D
2018/11/16
Background: Vitamin D deficiency is implicated in a range of common complex diseases that may be prevented by gestational vitamin D repletion. Understanding the metabolic mechanisms related to in uter...
Vitamin D prenatal programming of childhood metabolomics profiles at age 3 y
airway inflammation metabolomics polyunsaturated fatty acids prenatal programming vitamin D
2018/11/20
Background: Vitamin D deficiency is implicated in a range of common complex diseases that may be prevented by gestational vitamin D repletion. Understanding the metabolic mechanisms related to in uter...
Effect of maternal high dosages of folic acid supplements on neurocognitive development in children at 4–5 y of age: the prospective birth cohort Infancia y Medio Ambiente (INMA) study
folic acid supplements folate pregnancy periconception period child neurocognitive development
2018/11/16
Background: The benefits of the use of folic acid supplements (FASs) during the periconception period to prevent neural tube defects and to ensure normal brain development in offspring are well known....
Maternal protein intake in pregnancy and offspring metabolic health at age 9–16 y: results from a Danish cohort of gestational diabetes mellitus pregnancies and controls
pregnancy gestational diabetes mellitus protein insulin body composition
2018/11/15
Background: Recent years have seen strong tendencies toward high-protein diets. However, the implications of higher protein intake, especially during developmentally sensitive periods, are poorly unde...
Differences in genetic and environmental variation in adult BMI by sex, age, time period, and region: an individual-based pooled analysis of 40 twin cohorts
BMI adults genetics twins international comparisons
2018/11/15
Background: Genes and the environment contribute to variation in adult body mass index [BMI (in kg/m2)], but factors modifying these variance components are poorly understood.