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Climate Effects on Black Spruce and Trembling Aspen Productivity in Natural Origin Mixed Stands
dynamic models height growth functions mixed effects models biotic and edaphic effects climate change site productivity
2023/12/6
Forest managers need site productivity estimates for tree species growing in mixed stands. Models developed in the past are generally for pure stands and don’t factor in the effects of climate change ...
Spatial and temporal regulation of parent-of-origin allelic expression in the endosperm
programmed cell-death seed development DNA methylation gene-expression intact method arabidopsis embryo plants life identification
2023/11/16
Genomic imprinting promotes differential expression of parental alleles in the endosperm of flowering plants and is regulated by epigenetic modification such as DNA methylation and histone tail modifi...
Nickelates are a material class that has excited scientists because of its recently discovered superconducting ability, and now a new study led by Cornell has changed where scientists thought this abi...
The asparagus genome sheds light on the origin and evolution of a young Y chromosome
雄性双倍体 芦笋 石刁柏 基因组测序
2023/3/31
该成果为江西省农业科学院牵头，与美国乔治亚大学和华大基因等联合，对雄性双倍体（YY）芦笋（石刁柏）进行全基因组测序，利用Illumina（二代）+PacBio（三代）+BioNano（基因组拼接系统）等多种技术手段组装，得到芦笋（石刁柏）基因组大小约为1.3Gb，有27,656个蛋白编码基因被预测。通过对石刁柏参考基因组的比较组学及实验分析发现，单独但相互关联的基因负责性别决定。性染色体在细胞遗传...
Sitting atop each kidney and measuring only around two centimeters long, the adrenal glands are tiny but mighty. These glands produce steroid hormones, including those involved in stress response, blo...
Gene Coexpression Network Reveals Insights into the Origin and Evolution of a Theanine-Associated Regulatory Module in Non Camellia and Camellia Species
theanine regulatory module origin and evolution gene coexpression network comparative genomic analysis
2023/4/20
Theanine (thea) is one of the most important plant-derived characteristic secondary metabolites and a major healthcare product because of its benefificial biological activities, such as being an antia...
Fossils support new hypothesis for origin of hoofed mammals（图）
Fossils support new hypothesis origin hoofed mammals
2020/12/11
New research published in the Journal of Vertebrate Paleontology describes a fossil family that illuminates the origin of perissodactyls -- the group of mammals that includes horses, rhinos ...
Clouds' greenhouse effect instrumental in origin of tropical storms（图）
Clouds greenhouse effect instrumental origin tropical storms
2020/11/6
The tropical storm season in the Atlantic Ocean is already well into the Greek alphabet for naming.Better tropical storm track forecasting has allowed timely preparations and evacuations. However, pre...
A pneumonia outbreak associated with a new coronavirus of probable bat origin
pneumonia outbreak associated new coronavirus probable bat origin
2020/6/12
Since the outbreak of severe acute respiratory syndrome (SARS) 18 years ago, a large number of SARS-related coronaviruses (SARSr-CoVs) have been discovered in their natural reservoir host, bats1,2,3,4...
基于DRS origin的替代标准物质法研究——以超高效液相色谱测定乳香中11-羰基-β-乳香酸和11-羰基-β-乙酰乳香酸的含量为例
乳香 11羰基β乙酰乳香酸 替代标准物质法 相对校正因子 超高效液相色谱法 DRS origin软件
2020/9/2
以建立乳香中11-羰基-β-乳香酸(KBA)和11-羰基-β-乙酰乳香酸(AKBA)含量测定方法为例,探讨基于DRS origin软件的替代标准物质法用于色谱峰定性和定量的可行性与准确性。方法 使用超高效液相色谱建立含量测定方法,以AKBA为参照物,考察在19根不同C18色谱柱上使用DRS origin 软件对KBA定性的准确性;考察检测波长微小变化对相对校正因子的影响,并对替代标准物质法与外标法...
ORIGIN-DESTINATION-BASED PUBLIC TRANSPORT SERVICE GAP
Public transport Service gap Supply-Demand Origin-Destination Spatial disparity
2018/11/9
There are some studies that analyze public transport service gap by region from comparing supply and demand. However, due to data limitations, previous studies were limited in subdividing region-based...
Reproduction condition, words for spiky shapes tend to be rated by naive judges as more spiky than the words for round shapes. This suggests that iconicity may not only be the outcome of innovations i...
Three Types Of Extreme-Energy Space Particles May Have Unified Origin（图）
Three Types Extreme-Energy Space Particles Unified Origin
2018/2/1
One of the biggest mysteries in astroparticle physics has been the origins of ultrahigh-energy cosmic rays, very high-energy neutrinos, and high-energy gamma rays. Now, a new theoretical model reveals...
The Controversial Origin of a Symbol of the American West
Controversial Origin American West
2017/3/30
New research by Professor Beth Shapiro of the UC Santa Cruz Genomics Institute and University of Alberta Professor Duane Froese has identified North America’s oldest bison fossils and helped construct...
Germination of red raspberry seeds as affected by origin and chemical scarification
cultivars seed scarification mating design cross-pollination self-pollination
2018/3/6
In 2014, this research was conducted at the Research Institute of Horticulture in Skierniewice, Poland. It was based
on different red raspberry seed treatments with sulfuric acid during the scarifica...