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Disinfecting Agents
Published in James Agalloco, Phil DeSantis, Anthony Grilli, Anthony Pavell, Handbook of Validation in Pharmaceutical Processes, 2021
For varying disinfecting and sporicidal agents, a variety of containers need to be utilized. For ready-to-use mixtures we must decide how the product will be used. If in a smaller aerosol, trigger spray, or squeeze bottle, we may want to utilize a product that is pre-sterilized in this smaller form rather than attempting to pour or filter such solutions to an empty pre-sterilized container. We may also want to limit the capping of product “to be used later” as our assay and sterility may be compromised over time. For concentrated products that need to be diluted with a quality water grade, we may want to look to implement unit dose bottles that incorporate a premeasured dose and are sterile. This system is superior to that of pouring a concentrate disinfectant or sporicide into a measuring cup and capping the remainder for later use. Questions may arise as to the assay and sterility of this remaining solution over time.
Calorimetric Approach on the Thermal Hazard Assessment of Cumene Hydroperoxide
Published in Mihir Kumar Purkait, Piyal Mondal, Murchana Changmai, Vikranth Volli, Chi-Min Shu, Hazards and Safety in Process Industries, 2021
Mihir Kumar Purkait, Piyal Mondal, Murchana Changmai, Vikranth Volli, Chi-Min Shu
Structurally, TAM possesses two parts: a 25-liter thermostat water bath, and an external water circulator. Normally, although not always, water is continuously circulated by pump upwards into the thermostated water bath and connected to the external water circulator, which keeps the sample under an excellent constant temperature (or isothermal) environment (The Isothermal Calorimetric Manual for Thermometric, 1999). The ampoules containing sample and reference were inserted into a measuring cup between a pair of Peltier thermopile sensors. These sensors are in contact with a pair of metal heat sinks, where it is indicated that a pair of metal heat sinks of all cylinders are immersed into the thermostated water bath. Meanwhile, a pair of metal heat sinks carry messages to the Digital Voltmeter (DVM) of the heat difference between the sample and reference. DVM can continuously provide all messages to users by showing the related information, along with the situation of the experiments. As for data acquisition, the data, as shown in DVM, are simple heat powers from the sample, which illustrates the typical thermal curves of simple heat power (μW/g) versus time (day) from samples.
Disinfecting Agents
Published in Jeanne Moldenhauer, Disinfection and Decontamination, 2018
For varying disinfecting and sporicidal agents, a variety of containers need to be utilized. For ready-to-use mixtures we must decide how the product will be used. If in a smaller aerosol, trigger spray, or squeeze bottle, we may want to utilize a product that is pre-sterilized in this smaller form rather than attempting to pour or filter such solutions to an empty pre-sterilized container. We may also want to limit that the capping of product “to be used later” as our assay and sterility may be compromised over time. For concentrate products that need to be diluted with a quality water grade, we may want to look to implement unit-dose bottles that incorporate a pre-measured dose and are sterile. This system is superior to that of pouring a concentrate disinfectant or sporicide into a measuring cup and capping the remainder for later use. Questions may arise as to the assay and sterility of this remaining solution over time.
Identification technology based on geometric features of tooth print images
Published in Systems Science & Control Engineering, 2022
Ning Wang, Jiafa Mao, Lixin Wang, Yahong Hu
The materials and tools used in this paper to make dental molds are composed of alginate printing material powder, measuring spoon, measuring cup, knives, mixing bowls, and dental trays. Impression materials are harmless to the human body. The collection steps are as follows: Step 1: Take 2 spoons of the impression material and pour it into the mixing bowl. Use a measuring spoon to measure the impression material. Step 2: Pour 2 levels of water into the impression powder and start stirring. Step 3: Put the stirred alginate material evenly on the tray. Step 4: Put the dental tray containing the alginate material into the mouth, the person to be collected bites the dental tray, and takes the impression about 1 minute later. Step 5: Obtain the dental model image with a digital camera. The lighting, brightness, shooting distance, etc. are strictly consistent during the shooting process. Figure 15 is an example diagram of the tooth imprint samples of 5 different individuals collected by the above method.
Construction of sulfur-free gel breaker agent system and investigation on gel-breaking mechanism for association fracturing fluid
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2022
Zhe Wang, Guangsheng Cao, Yujie Bai, Peilun Wang, Xin Wang, Xincheng Liu, Dan Li
After gel breaker was added into the fracturing fluid system, complex physical and chemical reactions would occur, which would affect the rheological properties of the fracturing fluid. Therefore, it was necessary to measure the rheological properties of the association fracturing fluid at different temperatures (80°C, 90°C, and 100°C). The fracturing fluids were added to the measuring cup of the rheometer. The rotor was rotated at a shear rate of 170 s−1 and the temperature was gradually increased. The variable shear test was carried out and the shear cycle steps were 170 s−1, 150 s−1, 125 s−1, 100 s−1, 75 s−1, 50 s−1, 25 s−1, 50 s−1, 75 s−1, 100 s−1, 125 s−1, 150 s−1, 170 s−1. The shear stress at each shear rate was recorded. The relation curves of shear stress τ and shear rate D with a slope of n’ and an intercept of K’ were drawn in double logarithmic coordinates, where n’ meant flow regime index and K’ represented consistency coefficient (Boxue et al. 2020).
Effect of soaking time on rheological properties and settling characteristics of coking coal slurry
Published in International Journal of Coal Preparation and Utilization, 2022
Himanshu Pratap Singh, Salman Beg, Deo Raj Kaushal
The rheometer is enabled with a dynamic EC motor and a high precision encoder. It can be operated by a computational unit connected to it and output is displayed on the screen. This data can be stored or taken as a print out for further analysis. The rheometer is accompanied by a sensor system ST22-4V-40 with four bladed vane rotor. This four bladed vane rotor has a length of 40 mm and diameter of 22 mm. A measuring cup (CC27) is provided for placing the sample. While performing the tests, slurry samples are prepared having total weight of 60 g by mixing the appropriate amount of coking coal with tap water to get the desired concentration. The tap water is used to prepare slurry for transportation in the industry. Coking coal samples were weighed using an electronic balance with a precision of ±10−4 g.