搜索结果: 1-15 共查到“理学 HEAD”相关记录56条 . 查询时间(0.125 秒)
Staining of subfossil chironomid head capsules: a method for improving the extraction process from lake sediments and peat
chironomids stain biological
2021/7/26
Subfossil chironomids are regarded as a useful biological proxy for palaeoenvironmental research, but picking chironomid head capsules from aquatic sediments is extremely time-consuming.
NSF selects Anne Kinney to head Mathematical and Physical Sciences Directorate（图）
NSF Anne Kinney Mathematical and Physical Sciences Directorate
2017/11/23
The National Science Foundation (NSF) has selected Dr. Anne Kinney to serve as head of the Directorate for Mathematical and Physical Sciences (MPS), which supports fundamental research in astronomy, c...
How DNA protein machines collide head on and stop replication（图）
DNA protein machines collide head on stop replication
2017/9/5
A new study describes how head-on collisions between protein machines on chromosomes can disrupt DNA replication and boost the rate of gene mutations that help bacteria survive hostile environments, r...
NSF selects William E. Easterling to head Geosciences Directorate
NSF William E. Easterling head Geosciences Directorate
2016/12/13
The National Science Foundation (NSF) has selected William E. Easterling to serve as head of the Directorate for Geosciences (GEO), which supports fundamental research spanning the atmospheric, earth,...
For the first time scientists have looked at the net balance of the three major greenhouse gases—carbon dioxide, methane, and nitrous oxide—for every region of Earth’s landmasses. They found surprisin...
Expedition to the Aleutian Islands:Geoscientists head to remote Alaska volcanoes
the Aleutian Islands Geoscientists head Alaska volcanoes
2015/8/13
This is the 11th part in a series on NSF's geosciences risk and resilience interest area. Please see parts one, two, three,four, five, six, seven, eight, nine...
Investigation of Differential Vector Competence of Bartonella quintana in Human Head and Body Lice
lice bartonella vector
2014/12/12
Human head and body lice are obligatory hematophagous ectoparasites that belong to a single species Pediculus humanus. Only body lice, however, are vectors of the infections gram-negative bacteria Bar...
National Science Foundation selects George Mason University Professor James L. Olds to head Biological Sciences Directorate（图）
James L. Olds Sciences Directoratep
2014/9/12
The National Science Foundation (NSF) has selected George Mason University's James L. Olds to serve as assistant director for the Directorate for Biological Sciences (BIO). BIO's mission is to enable ...
Comment on "Head-on collision of electron acoustic solitary waves in a plasma with nonextensive hot electrons"
Comment Head-on collision of electron acoustic solitary waves nonextensive hot electrons Space Physics
2012/4/20
In a recent paper "Head-on collision of electron acoustic solitary waves in a plasma with nonextensive hot electrons" [Astrophys. Space Sci. 338, 271-278 (2012)] Eslami, Mottaghizadeh and Pakzad deal ...
Fusarium Ratings in Ontario Winter Wheat Performance Trial (OWWPT) Using an Index that Combines Fusarium Head Blight Symptoms and Deoxynivalenol Levels
breeding mycotoxins resistance
2014/2/25
Fusarium head blight (FHB) is one of the most serious diseases of wheat (Triticum aestivum L.). FHB reduces grain yield and quality, and the fungus produces mycotoxins, such as deoxynivalenol (D...
Effectiveness of Marker-based Selection for Fusarium Head Blight Resistance in Spring Wheat
deoxynivalenol head blight symptoms FHB-related traits Fusarium culmorum
2014/2/25
The effect of selection for two donor-QTL from Fusarium head blight (FHB) resistant spring wheat variety Sumai 3 on the reduction of deoxynivalenol (DON) content and FHB index was evaluated in field t...
Resistance to Fusarium Head Blight in Spring Barley
cultivar resistance Fusarium culmorum head blight hordeum vulgare
2014/2/25
Fusarium head blight (FHB) is a fungal disease causing substantial yield and quality losses in barley. Genetic variation in deoxynivalenol (DON) contentand and important yield traits in response to FH...
Evaluation of Resistance to Fusarium Head Blight in Wheat Using Different Sources of Inoculum
artificial inoculation breeding for resistance DON content FHB traits
2014/2/25
The response of four winter wheat cultivars, differing in resistance to Fusarium head blight (FHB), to spray inoculation with four selected Fusarium graminearum isolates, mixture of these isolates and...
We present a novel fiber-based near-field optical head consisting of a straw-shaped writing probe and a flat gap sensing probe. The strawshaped probe with a C-aperture on the end face exhibits enhance...
Pair Production from Asymmetric Head-on Laser Collisions
Pair Production Asymmetric Head-on Laser Collisions High Energy Physics Phenomenology
2011/8/19
Abstract: We evaluate particle production in highly asymmetric head-on collisions of lasers pulses due to non-perturbative coherent action of many photons. We obtain the yield of electron-positron pai...