During the penetrating period of groundwater, the surface mean temperature calculated from δ 18 O and δD shows that the paleoclimatical environment of Hebei plain in Quaternary Period became warmer gradually.
The low angular step shape thrust BD4SF and high angular dextral reversed strike-slips BF3、BF1-1 begin to be formed since Palaeogene period. While BD4SF, BF3 stop activation before Quaternary period, fault BF3 remains activated from Palaeogene to now. Badong 4 structure have been dissected by faults BF3 and BF1-1 since Palaeogene period.
The results of TL dating of the Quaternary volcanic rocks, baked layers and loess samples suggest that the Quaternary volcanic activity can be divided into 4 stages in the region studied, with the ages being 1.15-1.03, 0.86-0.72, 0.55-0.33 and 0.02 Ma B.P.
第四纪火山岩、火山岩烘烤层、以及黄土的热释光年龄测定数据表明,研究区的第四纪火山活动可分为四期,年龄分别为1.15—1.03、0.86—0.72、0.55—0.33和0.02 Ma B.P.
The profiles of these two types of paddy soils may be written as A-P-W- ⅡM-ⅡG1-ⅡG2 for soils developed on the Bluish Purple Clay originating from marine deposit, and A-P-W-Ⅱ W1-ⅡW2-Ⅱ C for those developed on the Quaternary Red Clay.
CO_2 reservoir was formed during magma crystallizing from magma invasion or effusion to Alluvium period, but the breaking process basically is in step with reservoir-forming process, the factor of the reservoirs-exist is continuance gas supply.
The trace representation of the dual of quaternary Goethals code G(m) is given.
Synthesis and surface-active property of bis-quaternary ammonium-sodium sulfate Gemini surfactant
N,N-dimethyldodecylamine, hydrochloride and epichlorohydrin (molar ration is 2:1:1) were used to synthesize bis-quaternary ammonium Gemini surfactant with a hydroxyl in its spacer group by the one-pot method.
This hydroxyl was sulfonated by chlorosulfonic acid and then neutralized to bis-quaternary ammonium-sodium sulfate zwitterionic Gemini surfactant.
Synthesis of bis-quaternary ammonium peroxotungstates (peroxomolybdates) and their catalytic activity in oxidation of alcohols b
The modern shape of the deposit and all industrial ores appeared in the Quaternary period during the formation of the unique extended oxidation zone.
Of 366 large and medium-sized oil and gas fields currently found in China, 212 reservoirs were formed in the Neogene-Quaternary period.
Occurrences of warm-adapted mammals in north China over the Quaternary Period and their paleo-environmental significance
The karst landforms distributed on the Qinghai-Xizang (Tibet) Plateau can be genetically classed with the Tertiary underground karst, which were gradually exhumed to the surface with the uplift of the plateau during Quaternary period.
for some profiles of coral reef show that the basic pattern of climatic fluctuation during the Quaternary period can be reflected by coral reef.
The distribution of Abies was deeply influenced by geological events such as the uplift of Himalaya, the Alps, the Rocky Mountains, the occurrence of the Asian Monsoon as well as the Quaternary glaciers.
Finally, the current distribution pattern appeared in the Quaternary.
The endemism was formed when some dispersal routes such as the North Atlantic Land Bridge, and the Bering Bridge became discontinuous during the Tertiary, as well as the climate change and glaciations in the late Tertiary and the Quaternary.
Derivatives of benzyl alcohol containing the quaternary ammonium fragment possessed auxin and anti-gibberellin (retardant) properties.
Polycondensation of a catalase (EC 220.127.116.11) with glutaraldehyde in order to stabilize the quaternary structure of an enzyme, maintain its activity, and protect it from thermal denaturation was studied.