The effect of different selenium concentrations on the antioxidant enzyme activity of Pterocypsela laciniata was studied by pot experiment. The results showed that the effects of different selenium treatments on P. laciniata were significant. With the increase of selenium concentration, the trend of...

A pot experiment was conducted to study the effects of different selenium concentrations on photosynthetic pigment content of Pterocypsela laciniata. Five aspects of chlorophyll a content, chlorophyll b content, carotenoid content and chlorophyll content, respectively, were used to analyze the changes...

A pot experiment was carried out to study effects of different selenium concentrations (0, 5, 10, 25, 50, 75, 100 mg/kg) on the photosynthetic pigment content in Solanum alatum. The results showed that all concentrations of selenium inhibited the chlorophyll a, chlorophyll b and carotenoid contents in...

In order to study the effects of grape seedlings intercropping with hyperaccumulators on five forms of cadmium in soil, a pot experiment was conducted to to study the effects of grape seedlings intercropping with Galinsoga parviflora, Siegesbeckia orientalis, Solanum nigrum and Crassocephalum crepidioides,...

A pot experiment was carried out to study effects of mulching with four hyperaccumulator (Solanum photeinocarpum, Tagetes erecta, Galinsoga parviflora and Bidens pilosa) straws on the total phosphorus and total potassium content in all parts of Cyphomandra betacea seedlings under cadmium stress. The...

A pot experiment was carried out to study effects of planting Cyphomandra betacea seedlings after mulching with four accumulators (Trifolium repens, Eclipta prostrata, Conyza canadensis and Stellaria media) straws on the content of soil nutrients under cadmium stress. The results showed that all accumulator...

A pot experiments were conducted to study the effect of mulching tolerance plant straw on phosphorus and potassium uptakes of Cyphomandra betacea seedlings under cadmium (Cd) stress, four tolerance plants (Digitaria sanguinalis, Clinopodium confine, Plantago asiatica, Ranunculus sieboldii) straw were...

A pot experiment was conducted to study the effects of different concentrations of selenium (Se) on photosynthetic pigment content of Perilla frutescens. The results showed that Se treatment had significant effect on contents of chlorophyll a, chlorophyll b, carotenoid and total chlorophyll. With Se...

A study was about the surface soil enzyme activity and N indicators Variation characteristics of Phyllostachys bambusoides forma shouzhu Yi forest in Liangping, Chongqing Municipality in spring and summer. The results showed that, the forest soil content of organic matter(OM), total nitrogen(TN), available...

In order to protect the increasingly gradually scarce forest resources and ecological resources in the urbanization, the forest construction has become an important measure to promote the greening and beautifying of the urban and rural areas at the present stage of our country. Forest construction involves...

Within 38 primer pairs tested, 26 pairs were successfully amplified, and 81 PCR bands were amplified, with an average value of 3.12 bands per primer, 18 pairs showed 100% polymorphic ratio, 2 pairs showed 66.67% polymorphic ratio. In total, 72 PCR polymorphic bands were determined, and in average, 2.77...

In order to find out the hydrogeological condition of aquifer and gain the permeability coefficient, the permeability coefficient was inverted based on the data of mine water inrush. The observation data of water flow and long-time observation hole’s water level was be used during the process of water...

With the continuous improvement of the manufacturing level in the aerospace, automobile, shipbuilding and other fields, higher requirements for the assembly precision and speed of the components in the manufacturing process are raised. However, the manual operation method is generally adopted in the...

The permeability testing technology is a kind of non-destructive testing method, which based on the change of permeability, can detect the stress concentration state and the degree of fatigue damage for ferromagnetic samples. The detection sensor based on the constant current source has higher detection...

Jumping robots have been a hot research spot, since they are playing an important role in the modern wars, aviation and exploration, due to their good ability in obstacle surmounting, excellent adaptability to the ground and strong adaptability to the environment. This paper presents a novel bionic locust...

This paper presents the ASIC design and implementation for micro-machined gyroscope, The ASIC interface is including an analog ASIC and a digital ASIC, and can afford driving closed-loop, On-chip reference generation, CIC and IIR filter chain, High performance MEMS gyroscope output detection. The two...

With the development of information technology, especially computer networks, remote acquisition based on the Internet has become a new trend of measurement and control systems. In this paper, a versatile and configurable data acquisition system for measuring engine parameters is presented using the...

Additional Smart Switch (ASS) is especially suitable for lighting power saving of existing buildings because its installation requires no wall damage and no rewiring. However, as a new device working in low light environment, it is a challenge for ASS to charge lithium battery with solar panels. This...

This paper presents a long distance transmission circuit of high precision micro-seismic signals for mines. This circuit implements current loop and isolation gate to improve the precision of mine micro-seismic signal acquisition and data quality. The test result shows that the transmission circuit can...

As a long-range precision guided high-tech weaponry, the cruise missiles have the advantages of strong penetration prevention capability, diversification of tactical use, and economical efficiency etc. After the Gulf War, many countries competed for research and develop the cruise missile. In this paper,...

Power transformers are key components in the stable operation of electric power system. Reasonable arrangements of maintenance strategy according to transformers’ working condition can decrease the loss lead by transformers’ faults. The dissolved gas analysis (DGA) is the widest technique used in transformers’...

According to the morphing requirements, this article proposes a morphing glide aircraft with high environmental adaptability. Based on Kane’s Method, six degree-of freedom dynamic model is built. The automatic disturbance rejection control technology is adopted to realize stability control of longitudinal...

Direct load control is one of the key technologies in demand response. Moreover, the security of control instruction and credibility of customers must be preserved in direct load control. Non-intrusive load control was used to simplify the process of customer credibility verification. A privacy-preserving...

Based on the safety operation requirements of petroleum special vehicles, a type of multifunctional virtual real-time general observation system is developed on the in-depth study of the well testing principle, on the in-depth study of the well testing principle, which can measure pulling force, tension...

The multi-walled carbon nanotubes combined with four polymers respectively were used as a sensitive layer of in the monolithically integrated gas sensor array. The multi-walled carbon nanotubes in the gas sensor array were added using a dip coating, and the corresponding polymer was added to different...

The evaluation of standard test blocks plays an important role in nondestructive test, quality of which influences the inspection and production activities. The weak magnetic inspection is adopted, which direct at the common defections including wracks and holes to achieve the quantitative analysis of...

The underground oil storage cavern has the advantages of safety, large storage capacity and economical. It is widely used in the national strategic petroleum reserve and various commercial storage. In order to solve the problem of crude oil sludge deposition, this paper based on the principle of jet...