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Sound velocities and densities of Al‐bearing superhydrous phase B (Al‐bearing SuB) were investigated up to 24 GPa and 1300 K by synchrotron X‐rays combined with ultrasonic interferometry techniques in a multi‐anvil apparatus. We found that Al + H incorporation decreases the adiabatic bulk modulus and shear modulus of SuB. Our results however suggest that this effect is less important than that of temperature. The presence of hydrous pyrolite with ∼10 wt.% Al‐bearing SuB in cold subducting slabs could explain up to ∼2% high velocity anomalies at the bottom of the mantle transition zone (500–660 km) while it turns into ∼7.7% low velocity anomalies below 660 km. Al‐bearing SuB is reportedly stable at mantle temperatures, where it could account for ∼12.2% low velocity anomalies beneath subduction zones in the uppermost lower mantle. Plain Language Summary: Among dense hydrous magnesium silicates, Superhydrous phaseB (SuB) is believed to hold large amount of water and transport it to the deep mantle. Recent studies showed that Al can largely increase the thermal stability region of SuB, suggesting this phase may also be an important carrier of water in the mantle transition zone (MTZ) and uppermost lower mantle (ULM). Here we investigated the sound velocities of Al‐bearing SuB up to 24 GPa and 1300 K using ultrasonic interferometry combined with synchrotron X‐ray techniques in a multi‐anvil apparatus. We found that Al + H incorporation decreases adiabatic bulk modulus and shear modulus of SuB. Our results however suggest that this effect is less important than that of temperature. Based on our elasticity data, we calculated velocity of a hydrated pyrolite composition, containing up to 10% of Al‐SuB along temperature profiles corresponding to cold slab and hot mantle at the depths of the MTZ and the ULM. We found that the presence of hydrous pyrolite may explain high velocity anomalies up to 660 km depth at MTZ while low velocity anomalies appear below 660 km along cold slab geotherm. Nevertheless, low velocity anomalies are generated in the whole depth range along a normal geotherm. Key Points: We constrained the Al + H incorporation on sound velocities of superhydrous phase B (SuB) up to 24 GPa and 1300 KAl + H incorporation which promoted by increased temperature significantly affect velocities of SuBAccumulation of Al‐bearing SuB can explain velocity contrast with various magnitude owing to the change of Al + H content with temperature [ABSTRACT FROM AUTHOR]

Aflatoxin B1 (AFB1) is a mycotoxin and is the most carcinogenic of all known chemicals. In view of the AFB1 characteristics of widespread distribution, serious pollution, great harm to humans, and animals and difficult to remove, it is urgent to develop a convenient and sensitive detection method. Moreover, chromatographic test strips (CTSs) are a rapid detection technology that combines labeling technology with chromatography technology. CTSs have been widely used in the fields of environmental monitoring, medical diagnosis, and food safety analysis in recent years. Different from other immune assays, they have the advantages of short measuring time, low cost, high efficiency and no need for professionals to operate. In addition, the introduction of nanomaterials has laid a good foundation for the detection of high sensitivity, high specificity and high efficiency via CTSs. Herein, we tend to comprehensively introduce the applications of chromatographic methods in AFB1 detection and pay attention to the signal detection modes based on nanomaterials in antibody-based immunochromatographic strips (ICSs), such as colorimetric, fluorescent, chemiluminescent, and Raman scattering sensing. Some typical examples are also listed in this review. In the end, we make a summary and put forward prospects for the development of CTSs. This review is the first systematic review about the applications of antibody-/aptamer-based chromatographic methods for rapid AFB1 detection. Pay attention to the signal detection modes based on nanomaterials in antibody-ICSs, such as colorimetric, fluorescent, chemiluminescent and Raman scattering sensing. Make a summary about some typical examples and put forward prospects for the development of CTSs. [ABSTRACT FROM AUTHOR]

The single channel theoretical bandwidth of the UM-BUS can be up to 200 Mb/s. When 16 channels are used for concurrent transmission, the theoretical bandwidth can be up to 400 MB/s. So the test system needs to establish a communication channel of no less than this bandwidth between the data acquisition terminal and PC. In PCIe1.1, the theoretical bandwidth of the four channel transmission is up to 1 GB/s, which meets the transmission requirements of the UM-BUS test system. Thus, this paper realizes the application scheme of PCIe1.1 x4 link channel of UM-BUS bus test system, and gives the BMD transmission scheme of PCIe bus based on FPGA. The test result shows that the actual transmission speed of the scheme can reach 550 MB/s, which satisfies the bandwidth requirements of the UM-BUS bus test system.

Treating 2‐acetyl‐1‐chloro‐1,2‐dihydro‐3H‐1λ3‐benzo[d][1,2]iodazol‐3‐one 1 f with sliver cyanate in dried chloroform was found to give hypervalent isocyanato‐iodine(III) reagent 5 in excellent yield, while the oxo‐bridged 1,1′‐oxybis(2‐acetyl‐1,2‐dihydro‐3H‐1λ3‐benzo[d][1,2]iodaz‐ol‐3‐one) 6 was obtained when a mixture of chloroform and water was used as solvent. Structure of these two hypervalent iodine reagents were established by X‐ray crystallography and their reaction with base, aniline, methanol and cyclic ether were investigated. A previously reported 1‐cyanato benziodoxole compound was revisited and its structure was revised. [ABSTRACT FROM AUTHOR]