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Vortex beams (VBs) carrying orbital angular momentum (OAM) have shown promising potential in enhancing communication capacity through the possession of multiple multiplexing dimensions involving the OAM mode, polarization, and wavelength. Although many research works on multidimensional multiplexing have been conducted, the (de)multiplexer compatible with these dimensions remains elusive. Following the expanded concept of the Pancharatnam-Berry (PB) phase, we designed a polarization-dependent phase-modulation metasurface to phase-modulate the two orthogonal linearly polarized components of light, and two Dammann vortex gratings with orthogonal polarization responses were loaded to simultaneously (de)multiplex OAM mode and polarization channels. As a proof of concept, we constructed a 16-channel multidimensional multiplexing communication system (including two OAM modes, two polarization states, and four wavelengths), and 400 Gbit/s quadrature-phase shift-keying (QPSK) signals were transmitted. The results demonstrate that the OAM mode and polarization channels are successfully (de)multiplexed, and the bit-error-rates (BERs) are below 1.67 × 10 -6 at the received power of -15 dBm., (© 2023 the author(s), published by De Gruyter, Berlin/Boston.)

Vortex beams carrying orbital angular momentum (OAM) modes show superior multiplexing abilities in enhancing communication capacity. However, the signal fading induced by turbulence noise severely degrades the communication performance and even leads to communication interruption. Herein, we propose a diversity gain strategy to mitigate signal fading in OAM multiplexing communication and investigate the gain combination and channel assignment to optimize the diversity efficiency and communication capacity. Endowing signals with distinct channel matrices and superposing them with designed channel weights, we perform the diversity gain with an optimal gain efficiency, and the signal fading is mitigated by equalizing the turbulence noise. For the tradeoff between turbulence noise tolerance and communication capacity, multiplexed channels are algorithm-free assigned for diversity and multiplexing according to bit-error-rate and outage probability. As a proof of concept, we demonstrate a 6-channel multiplexing communication, where 3 OAM modes are assigned for diversity gain and 24 Gbit/s QPSK-OFDM signals are transmitted. After diversity gain, the bit-error-rate decreases from 1.41 × 10 -2 to 1.63 × 10 -4 at -14 dBm, and the outage probability of 86.7% is almost completely suppressed.

Purpose: To address whether Curcumin has synergistic effect with cytarabine (Ara-C) in treating acute myeloid leukemia (AML)., Methods: A xenograft AML mouse model was established by injecting HL-60 cells into tail vein of mice to assess the function of Curcumin. Mononuclear cells (MNCs) isolated from AML mice and AML cell lines were used to examine the effect of Curcumin. Metagenomics and metabolomics were used to evaluate the alteration of intestinal microbiota and the change of metabolites in MNCs., Results: Curcumin treatment sensitized response to Ara-C in MNCs of AML mice, but had no direct effect on AML cell lines. Metagenomics revealed an alteration of intestinal microbiota with Curcumin treatment, which contributes to sensitized response to Ara-C. Curcumin treatment led to enhanced intestinal intact to sensitize response to Ara-C in AML mice, through reducing mucus degrading bacteria. Metabolomics demonstrated that Curcumin treatment led to decreased cholesterol in MNCs of AML mice. Further study proved that Curcumin treatment resulted in inhibition of SQLE, a key enzyme of cholesterol biosynthesis, to increase sensitivity to Ara-C., Conclusion: Curcumin sensitizes response to Ara-C through regulating microbiota, highlighting the importance of intestinal intact strengthening in chemoresistant therapy. Moreover, aiming at cholesterol synthesis is promising in AML treatment., (© 2021. The Author(s).)

Six organophosphate esters (OPEs) with different octanol-air partition coefficient (K OA ) were measured from gas and particle samples collected from an urban area of Central China between June 2018 and May 2019. The highest concentration of total OPEs (∑ 6 OPEs) in total suspended particle (TSP) were found in winter, followed by spring, autumn, and summer. ∑ 6 OPEs showed significant positive correlation with TSP concentration (p < 0.01), significant negative correlation with temperature (p < 0.01), weak negative linear correlations with relative humility (p < 0.05), and no significant correlations with wind speed (p > 0.05). Although OPEs were not detected in polyurethane foams (PUFs), the poly-parameter linear free energy relationship model (pp-LFER) estimated particle fractions of OPEs (f part pp-LFERg/p ) were below 2.73% for Tris (2-chloroisopropyl) phosphate (TCIPP), Tris (chloroethyl) phosphate (TCEP), and Tributyl phosphate (TnBP); 67.8% for Triphenyl phosphate (TPhP); and above 99.6% for TBOEP and TCrP. The concentrations of particle-bound TPhP, TCrP, and TBOEP estimated by pp-LFER (C part pp-LFERg/p ) were 0.19, 0.09, and 0.05 ng/m 3 , which were in good agreement with measurements. However, the estimated C part pp-LFERg/p of TCEP, TCIPP, and TnBP showed obvious differences with measured data. According to filter-air partitioning estimated by pp-LFER, the strong adsorption of gaseous OPEs to glass fiber filter (GFF) may be responsible to the underestimation. Besides, the weak adsorption of gaseous OPEs to PUF is likely to be another important reason for the discrepancy between measured and modeled results. Therefore, the risk assessment of gaseous OPEs should be of concern in the further research., (© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)

Background: The efficacy of acute ischemic stroke treatment is affected by thrombus composition and age, yet no diagnostic method capable of quantitative thrombus characterization currently exists. This in vitro study evaluates the use of R 2 * , quantitative susceptibility mapping (QSM), and proton density fat fraction (FF) maps derived from a single gradient echo (GRE) MRI acquisition for characterizing clot of various hematocrit, as well as added calcified and lipidic components, throughout aging., Methods: Two thrombus phantoms containing porcine clots (10-60% hematocrit, one with added calcium or lard) were scanned serially throughout 6 days of aging. Three-dimensional multi-echo GRE imaging was used to generate R 2 * , QSM, and FF maps, from which mean values for all clots at every time point were obtained. Receiver operating characteristic analysis was used to derive thresholds differentiating acute from chronic clot, and measured R 2 * and QSM were tested for their ability to estimate clot hematocrit., Results: R 2 * and QSM varied minimally over the first 6 hours of aging (acute), and QSM was found to linearly relate to clot hematocrit. Beyond 6 hours (chronic), R 2 * and QSM increased considerably over time and hematocrit could be estimated from the R 2 * /QSM ratio. R 2 * and QSM thresholds of 22 s -1 and 0.165 ppm differentiated acute from chronic clots with a sensitivity/specificity of 100%/100% and 85%/92%, respectively. QSM and FF maps definitively distinguished calcium and lipid, respectively, from clots of any hematocrit and age., Conclusions: R 2 * , QSM, and FF from a single multi-echo GRE scan discriminated hematocrit and age, and distinguished calcification and lipid withinin vitro clot., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2019. No commercial re-use. See rights and permissions. Published by BMJ.)

Objective To evaluate the efficacy of Ganoderma lucidum preparation on the behaviors,biochemistry,and autoimmunity parameters of mouse models of APP/PS-1 double transgenic Alzheimer's disease(AD).Methods A total of 44 4-month-old APP/PS-1 double transgenic AD mice were randomly divided into AD model group,Aricept group,Ganoderma lucidum middle-dose(LZ-M)group,and Ganoderma lucidum high-dose(LZ-H)group,with 11 mice in each group.In addition,10 4-month-old C57BL/6 mice were used as the control group.Water maze test was conducted to observe the behavior changes,and the protein expressions in brain tissues were detected by Western blot analysis.The autoimmune indicators were detected by indirect immunofluorescence method.Results In the navigation experiment,the time of finding the platform was gradually shortened since the 2 nd day in the control,LZ-H,and LZ-M groups,and the time of searching the platform in the AD model group gradually increased.On the 5 th day,the time of finding platform was significantly shorter in control group (t=5.607,P=0.000) and LZ-H group(t=2.750,P=0.010)than AD model group.In the space exploration experiment,the number of crossing the target platform(t=2.452,P=0.025)and the residence time in the target quadrant(t=2.530,P=0.020)in AD model group mice was significantly smaller/shorter than those in control group;in addition,the number of crossing the target platform in the AD model group was significantly smaller than that in LZ-H group(t=2.317,P=0.030)and LZ-M group(t=2.443,P=0.030),while the residence time in target quadrant decreased significantly(t=2.770,P=0.020)compared with LZ-H group;the number of crossing through the target platform quadrant(t=2.493,P=0.022)and residence time in the target quadrant(t=2.683,P=0.015)in LZ-H group were significantly higher than in Aricept group.Western blot analysis showed that the expression of ApoA1 in the brain tissues of mice in LZ-H and LZ-M groups were significantly higher than those in AD model group(P<0.01,P<0.05);Aβ-40 expression in LZ-H group was significantly lower than that in AD model group(P<0.05);the expressions of Syt1,ApoE,and ABCA1 in brain tissues of mice in LZ-H group were significantly higher than those in model group(P<0.01,P<0.05).The plasma IgG level in Aricept group(t=30.945,P=0.000),LZ-M group(t=25.639,P=0.000)and LZ-H group(t=4.689,P=0.001)were significantly higher than that in the control group.Conclusion Ganoderma lucidum preparation can improve behavior disorders of AD model mice,promote the expressions of ApoA1,ApoE and Syt1,inhibit the expression of Aβ-40 protein,and improve the autoimmune function.

Purpose: To develop and evaluate a tool for accurate, reproducible, and programmable motion control of imaging phantoms for use in motion sensitive magnetic resonance imaging (MRI) appli cations., Methods: In this paper, the authors introduce a compact linear motion stage that is made of nonmagnetic material and is actuated with an ultrasonic motor. The stage can be positioned at arbitrary positions and orientations inside the scanner bore to move, push, or pull arbitrary phantoms. Using optical trackers, measuring microscopes, and navigators, the accuracy of the stage in motion control was evaluated. Also, the effect of the stage on image signal-to-noise ratio (SNR), artifacts, and B0 field homogeneity was evaluated., Results: The error of the stage in reaching fixed positions was 0.025 ± 0.021 mm. In execution of dynamic motion profiles, the worst-case normalized root mean squared error was below 7% (for frequencies below 0.33 Hz). Experiments demonstrated that the stage did not introduce artifacts nor did it degrade the image SNR. The effect of the stage on the B0 field was less than 2 ppm., Conclusions: The results of the experiments indicate that the proposed system is MRI-compatible and can create reliable and reproducible motion that may be used for validation and assessment of motion related MRI applications.

The ever-increasing scale of biological data sets, particularly those arising in the context of high-throughput technologies, requires the development of rich data exploration tools. In this article, we present AnnotCompute, an information discovery platform for repositories of functional genomics experiments such as ArrayExpress. Our system leverages semantic annotations of functional genomics experiments with controlled vocabulary and ontology terms, such as those from the MGED Ontology, to compute conceptual dissimilarities between pairs of experiments. These dissimilarities are then used to support two types of exploratory analysis-clustering and query-by-example. We show that our proposed dissimilarity measures correspond to a user's intuition about conceptual dissimilarity, and can be used to support effective query-by-example. We also evaluate the quality of clustering based on these measures. While AnnotCompute can support a richer data exploration experience, its effectiveness is limited in some cases, due to the quality of available annotations. Nonetheless, tools such as AnnotCompute may provide an incentive for richer annotations of experiments. Database URL: http://www.cbil.upenn.edu/annotCompute/

To study the expression of beta-human chorionic gonadotropin (beta hCG) genes in renal cell carcinomas (RCC) and benign renal disease tissues, nested reverse transcription-polymerase chain reaction (RT-PCR) and restriction endonuclease analysis were employed to detect the expression of beta hCG genes in 44 cases of RCC tissues and 24 cases of benign renal disease tissues. It was found that 52% RCC samples revealed positive for beta hCG mRNA expression. Positive rate in advanced stage and poorly differentiated RCC was higher, but there was no significant difference. The positive rate of beta hCG mRNA expression was 54% in 24 cases of benign renal tissues, including 3 cases out of 6 polycystic kidneys, 7 cases out of 13 renal atrophies, 2 cases out of 2 oncocytomas and 1 case out of 2 pyonephrotic kidneys. beta 7 was most frequently transcribed subtype gene independent on the histology. These findings suggested beta hCG gene transcription is not only involved in RCC but also in benign renal diseases.