In-vivo measurement of force/torque and translation/rotation signals between the catheter and vessels during vascular surgery operations could provide a ground-truth data set for constructing and evaluating haptics-enabled surgical simulation systems. In this paper, we introduce a solution to measure both the translation/rotation of the catheter and the pushing/retracting resistance force and twisting resistance torque caused by multiregion contacts between the catheter and the vascular wall. The prototype has been validated with manipulation experiments of inserting a catheter into a vascular phantom model. The results illustrate that the device can detect collisions between the catheter and the vascular walls. Subtle force/torque changes caused by changes of movement direction can be detected. Force/torque changes at some critical point, such as the intersection point of vessels, can also be detected. The measurement of the catheter position can cover required ranges of translation or rotation.

In-vivo measurement of force/torque signals between a surgical tool and human vessels during vascular surgery operations could provide a ground-truth data-set for constructing and evaluating haptics-enabled surgical simulation systems. In this paper, we introduce a novel wearable device for measuring such signals. This new design provides much higher measurement accuracy than a previous prototype. Experimental results by using standard weights provide that the relative force and torque error is about 5%. With time-varying load, the new device is compared with an ATI Nano17 force/torque sensor; average relative errors between the force signals is about 16.85%, and average relative errors between the torque signals is about 28.74%. Preliminary manipulation experiments of inserting a catheter into a vascular phantom model illustrated that the device can detect the collision between the catheter and the vascular walls. Subtle force/torque changes caused by changes of movement direction can be detected. Force/torque changes at some critical point (such as the interaction point of vessels) can also be detected.

In-vivo measurement of force signals between surgical tool and human tissues is an important research topic in high-fidelity surgical simulations. In this paper, we introduce a portable device for real-time in-vivo measurement of friction force and torque during vascular surgery operations. To measure multi-region contacts between the guide wire and the vascular wall, two portable sensor modules are mounted on surgeon's fingertip of thumb and index finger. Based on relative motion between an inner shaft and an outer socket, the sensor module can detect in real-time one-dimensional pushing or retracting resistance force and one-dimensional twisting resistance torque between the guide wire and the vascular wall. The sensor module is based on a modular design of three off-the-shelf one-dimensional force sensors, which provides a flexible solution to realize compact design. Preliminary experiments indicate the sensor modules can provide a portable solution for real-time measuring the force and torque signals during vascular surgery operations.

The best resin which is used to recovery lipoic acid in lipoic acid wastewater is NG-16 macroporous adsorption resin. The result is determined by dynamic adsorption experiments. The optimal operation conditions are as follows: pH value of 5-5.5, at room temperature, adsorption flux of 3BV/h, double-column series disposing volume is 25BV/batch; at 303K, the resin is desorbed by 3BV methanol+2BV water, at 1BV/h flux; the pH of high-concentration desorption solution is adjusted to 7.2-7.8, and lipoic acid and methanol are recoveried by distillation; low-concentration desorption liquid is applied for next batch. Per tonne of waste can be recoveried 1.1kg lipoic acid about 80% purity. The lipoic acid content in treated wastewater is reduced from 1300-1500mg/L to 0, the total sulfur content is reduced from 400-450mg/L to 0.05mg/L, B/C increased from 0.30 to 0.65.

The article provides an overview of the development status of the treatment technology of wastewater containing phenols and various kinds of treatment technologies.And it introduces emphatically the treatment technologies,influencing factors,advantages and disadvantages of extraction method,distillation method,assay method,chemical oxidation method,wet air oxidation method,supercritical oxidation and biochemical.

The resin adsorption process has been developed to remove phenols from coking wastewater and its technological parameters are optimized. The results show that the ultra-cross linking adsorption resin, NDA-99, is an effective adsorbent to treat the coking waste water when its pH is 4.0 and the absorbing flux is 40 mL/h, and the mono-column wastewater treatment capacity is 300 mL per batch. Under the condition of 50degC, 10 mL 8% NaOH + 10 mL 4% NaOH + 20 mL water is selected as the desorption reagent, and the flux is WmL/h. After the treatment process, the concentrations of volatile phenol and COD decrease from about 1 380 mg/L to 12 mg/L, and 15 500 mg/L to less than 650 mg/L respectively. The raw phenol desorption solution can be recovered just as the high concentration desorption solution by isopropyl ether extraction-distillation. Thus, the resource recycle of phenol in coking wastewater is carried out.

This research took granular activated carbon and resin as adsorbent separately, adopting pressure swing adsorption to purify gas containing low concentration Toluene. Results from this trial show: NDA-150 resin has the optimum effect of adsorption for air containing toluene. The optimum adsorption rates of resin and activated carbon are 92.3% and 83.5% separately, and the optimum adsorption flux of resin and activated carbon are 5L/min and 4L/min respectively, the best time for adsorption both are 10min, pressure for desorption is -0.05Mpa, and the optimal time for desorption both are 10min. Seen from comparison of trial results, resin for treating air containing toluene as adsorbent is better than activated carbon.

A sensitive HPLC method for the simultaneous determination of diniconazole, thiram and imidacloprid from the mixture was developed. YWG C18 column saved as solid phase and CH3OH-H2O as mobile phase. Detection wavelength was set at 260 nm and quantitative analyzing was performed with an external standard method. The results showed that the standard derivation for three agrahemicals was 7.0×10-5-9.0×10-4, coefficient of variation was 1.00-3.05%, and average recovery was 96.15-102.00%, 100.00-105.92%, 97.05-102.92%, respectively. The method was useful for conventional analysis and quality control research, being rapid and simple to conduct with good accuracy and reliability.

Air samples were collected from Lanzhou city by mixed sorbents GDX 502 and GDX101 in glass tubes. The air samples eluted by a certain volume of mixed organic solvents and concentrated by N2, or desorbed from sorbents in glass tubes by a device named heated desorption and concentration injector. The obtained samples were injected into GC-MS and the substances in the samples were separated and qualitative analysis was made of the substances which had higher concentration. The experimental method was easy to operate and as many as 380 substances were detected in a sample. The method showed a better sensitivity and a shorter running time for a sample. Meanwhile, it avoided further pollution in air owing to using less volume of organic solvents.