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Sustainable rosin acid ester as internal electron donors in Ziegler-Natta catalysts for synthesis of isotactic polypropylene with high melt flow rate
Bio-derived rosin acid esters internal electron donors Ziegler-Natta catalyst polypropylene polymerization
2023/12/11
In this contribution, novel bio-derived rosin acid ester compounds have been developed and used as internal electron donors to prepare MgCl2?supported titanium catalysts for propylene polymerization. ...
Ecological Interactions, Environmental Gradients, and Gene Flow in Local Adaptation
anti-herbivore defense environmental gradients evolution gene flow herbivore–pollinator interaction sphenology
2023/12/7
Despite long-standing interest in local adaptation of plants to their biotic and abiotic environment, existing theory, and many case studies, little work to date has addressed within-species evolution...
A highly proton-conductive and vanadium-rejected long-side-chain sulfonated polybenzimidazole membrane for redox flow battery
Sulfonated long side chain Polybenzimidazole Vanadium redox flow battery 1 3-Propanesultone
2023/6/19
A long-side-chain sulfonated polybenzimidazole (PBI-PS) membrane was successfully prepared by the reaction of PBI with 1, 3-propanesultone for improving the efficiencies of vanadium redox flow battery...
探讨二维超声联合四维彩超超高细微分辨血流技术(HD-flow)彩色血流显像在产前诊断先天性心脏发育异常中的临床应用价值。方法 选取2016年7月至2018年2月在小榄人民医院行产前超声检查并分娩的单胎妊娠孕妇2 200例，先对所有入组的孕妇进行二维超声检查，二维超声检查提示胎儿疑似宫内心脏发育异常的孕妇再联合应用四维彩超HD-flow彩色血流显像进行检查。将进行二维超声的检查结果作为对照组，将二维...
Rethinking Secure FPGAs: Towards a Cryptography-friendly Configurable Cell Architecture and its Automated Design Flow
eFPGA ASIC
2018/8/8
This work proposes the first fine-grained configurable cell array specifically tailored for cryptographic implementations. The proposed architecture can be added to future FPGAs as an application-spec...
4D-SFM PHOTOGRAMMETRY FOR MONITORING SEDIMENT DYNAMICS IN A DEBRIS-FLOW CATCHMENT: SOFTWARE TESTING AND RESULTS COMPARISON
4D-SfM Photogrammetry Sediment dynamics monitoring Software comparison Debris flow hazard
2018/6/4
In recent years, the combination of Structure-from-Motion (SfM) algorithms and UAV-based aerial images has revolutionised 3D topographic surveys for natural environment monitoring, offering low-cost, ...
Numerical simulation of response of groundwater flow system in inland basin to density changes
Inland basin Groundwater Flow System TOUGHREACT Fluid density
2018/3/23
The developmental characteristics of groundwater flow system are not only controlled by formation lithology and groundwater recharge conditions, but also influenced by the physical properties of fluid...
Multiple Dolomitization and Fluid Flow Events in the Precambrian Dengying Formation of Sichuan Basin, Southwestern China
Precambrian dolomite geological fluid flow meteoric water hydrothermal activity Sichuan Basin
2018/4/10
The Precambrian Dengying Formation is a set of large-scale, extensively dolomitized, carbonate reservoirs occurring within the Sichuan Basin. Petrographic and geochemical studies reveal dolomitization...
Gas sorption and non-Darcy flow in shale reservoirs
Apparent gas permeability Shale Adsorbed gas Dissolved gas Surface diffusion
2018/4/2
Gas sorption and non-Darcy flow are two
important issues for shale gas reservoirs. The sorption
consists of dissolution and adsorption. Dissolved gas and
adsorbed gas are different. The former is d...
Mathematical modeling of heat transfer in counter-current multiphase flow found in gas-drilling systems with formation fluid influx
Gas-drilling Temperature Prediction Influx Joule–Thomson Cuttings
2018/4/2
The performance of gas-drilling (drilling oil and gas wells with air, nitrogen, or natural gas) is very unpredictable in many areas due to lack of proper design of drilling parameters because of limit...
Correction of source-rock permeability measurements owing to slip flow and Knudsen diffusion: a method and its evaluation
Shale gas Permeability Knudsen diffusion Unconventional reservoir Source rock
2018/4/2
Source-rock permeability is a key parameter that controls the gas production rate from unconventional reservoirs. Measured source-rock permeability in the laboratory, however, is not an intrinsic prop...
Hypertension during Weight Lifting Reduces Flow-Mediated Dilation in Nonathletes
EXERCISE ENDOTHELIUM VASODILATION BRACHIAL ARTERY
2018/4/24
Purpose The purpose of this study was to determine whether increased intraluminal pressure is the damaging factor that reduces flow-mediated dilation (FMD) in young, healthy subjects after resistance ...
Thermodilution-determined Internal Jugular Venous Flow
CEREBRAL BLOOD FLOW INTERNAL JUGULAR VENOUS FLOW THERMODILUTION TRANSCRANIAL DOPPLER
2018/4/24
Purpose Cerebral blood flow (CBF) increases ~20% during whole body exercise although a Kety–Schmidt–determined CBF is reported to remain stable; a discrepancy that could reflect evaluation of arterial...
Dynamics of fluid and heat flow in a CO2-based injection-production geothermal system
Binary system CO2-water displacement Heterogeneity Preferential flow
2018/3/23
CO2 is now considered as a novel heat transmission fluid to extract geothermal energy. It can be used for both energy exploitation and CO2 geological sequestration. Here, a 3-D, “two-spot” pattern wel...
Based on their genesis, springs are commonly classified as depression spring, contact spring, overflow spring and fault spring, etc. In addition, a kind of springs, i.e., up-flow spring, can be found ...