Search

The evolution patterns of the Neo-Tethys Himalayas have been a major topic of research, particularly in the Neo-Tethys Ocean. The geological field investigations were conducted in the Late Jurassic-Early Cretaceous Sangxiu Formation in the Tsomei Longzi area of Tibet. A stratigraphic hierarchy of the Sangxiu Formation was established based on an analysis of the sedimentary lithology in this area. Based on the geochemical characteristics and chronology of the felsic-mafic volcanic rocks of the Sangxiu Formation, the genesis, tectonic background, and evolutionary pattern of the volcanic rocks of the Sangxiu Formation were revealed. Basalts, dolerite, and volcanic debris constitute the volcanic rocks of the Sangxiu Group in the Zhegu area. The Early Cretaceous Sangxiu Formation basalts were determined using SHRIMP zircon U-Pb ages of 141 ± 1 Ma and 142 ± 1 Ma. Volcanic rocks of the Sangxiu Formation, which are intraplate rifting products of the Late Jurassic-Early Cretaceous period, originated from the mantle and mixed with crustal materials. The rock type is an intraplate alkaline basalt that formed during the rifting activity of the passive continental margin extension. There was a crucial growth episode in the Neo-Tethys Ocean during the Late Jurassic and Early Cretaceous. The Neo-Tethys Ocean expansion from the Late Triassic to the Early Cretaceous was caused by a younger rifting along the passive continental edge rather than a continuation of the early Mid-Ocean Ridge development, thus demonstrating the expansion of the Neo-Tethys Ocean at various stages.

Additional file 1: Table S1. The association between NLR, PLR value and favorable outcome. Figure S1. Predicted probability of favorable outcome by neutrophil to lymphocyte ratio, platelet to lymphocyte ratio. Figure S2. Association of predicted value of favorable outcome between neutrophil to lymphocyte ratio and platelet to lymphocyte ratio. Figure S3. Receiver operating characteristic curves. Figure S4. The Kaplan-Meier curve.

This study intends to explore how online comments influence the reception of inspirational COVID-19 online videos. A survey experiment will be conducted to examine the influence of inspirational COVID-19 videos with positive, negative, or no comments on bandwagon perceptions, norm perceptions about self-transcendent behaviors, meaningful affect, and prosocial outcomes. In addition, the moderating effect of the light triad personality is taken into account.

In this work, a 4’-(4-cynaophenyl)-4,2’:6′,4-terpyridine supported CuI MOFs photocatalyst (CuIMOF) was applied to the photocatalytic CO2 reduction for the first time. The micro-structural and physicochemical properties of the CuIMOF were systematically studied by the powder X-ray diffraction (PXRD), Single crystal X-ray diffraction (SCXRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR), UV-Vis diffuse spectroscopy (UV-vis DRS), ns-level photoluminescence spectra (ns-level PL), Ultraviolet photoelectron spectroscopy (UPS), and N2 adsorption-desorption test (BET-BJH). Moreover, the in situ diffuse reflectance infrared fourier transform spectroscopy (in situ DRIFTS) was applied to investigate the adsorption and reaction intermediates of photocatalytic CO2 reduction. As a result, CuIMOF exhibited good performance and outstanding selectivity toward photocatalytic reduction of CO2 to CO under full-spectrum and visible light illumination. Notably, 100% selective photocatalytic conversion of CO2 to CO was achieved. Thus, the study presents the high selectivity and CO2 reduction efficiency of CuIMOF as a potential family of photocatalysts.

BACKGROUND Blueberries are appreciated by consumers for their rich natural antioxidants and their good nutritional and health functions. However, blueberries are very perishable due to microbial infection and metabolic aging after harvest. Ethanol has been shown to have the effect of controlling postharvest microorganisms and improving storage quality of fruits and vegetables. This study aimed to clarify the effects of ethanol on the appearance quality and flavor attributes of postharvest blueberries. Blueberries were treated with ethanol (250, 500, and 1000 μL L-1 ) and stored at 0 ± 0.5 °C, 90% relative humidity (RH), for 40 days. RESULTS The results indicated that ethanol treatment could slow the decline of blueberry firmness and reduce the decay rate significantly in a dose-dependent manner. The soluble solids content (SSC) and titratable acidity (TA) of ethanol-treated blueberries increased significantly (P

BACKGROUND Blueberry is universally acknowledged as a kind of berry rich in antioxidants. Cold plasma, an emerging non-thermal treatment technology, has been proved to be able to maintain or improve the antioxidant level while inactivating the microorganisms on the surface of fruits and vegetables. Postharvest blueberries were treated with atmospheric cold plasma (ACP; 12 kV, 5 kHz) for 0 s (Control), 30 s (ACP-30), 60 s (ACP-60), and 90 s (ACP-90) in this study, and the effects of ACP on the antimicrobial properties, antioxidant activities, and reactive oxygen species (ROS) production were investigated during storage at 4 ± 1 °C for 40 days. RESULTS Total aerobic bacteria and mold populations on ACP-treated blueberries decreased significantly in a time-dependent manner (P

Blueberry fruit were treated with 500 μL L−1 ethanol for 18 h and then stored at 0 ± 0.5 °C with 90 % relative humidity (RH) for 40 d. The firmness, contents of cell wall polysaccharides, activities of cell wall-degrading enzymes (CWDEs), and cell wall ultrastructure in the blueberry fruit were determined during storage. The results showed that the decline in firmness of blueberries was delayed by ethanol vapor treatment during cold storage and shelf life, compared to the control. The contents of water-soluble pectin (WSP) and 4 % KOH-soluble fraction (4KSF) in ethanol-treated blueberries were reduced compared to those in the control. The contents of EDTA-soluble pectin (ESP), Na2CO3-soluble pectin (SCSP), 24 % KOH-soluble fraction (24KSF), and cellulose in ethanol-treated blueberries were higher than the control. The activities of pectin methylesterase (PME), polygalacturonase (PG), carboxymethyl cellulase (CMCase), β-glucosidase (β-Glu), β-galactosidase (β-Gal), α-galactosidase (α-Gal), and α-mannosidase (α-Man) in blueberries were suppressed by ethanol vapor treatment. However, there was no significant difference in the activity of α-arabinofuranosidase (α-Af) between ethanol-treated blueberries and the control. Moreover, ethanol vapor treatment delayed the destruction of the cell wall structure of the blueberry fruit via ultrastructural observations. Ethanol vapor treatment can retard the disassembly of cell wall polysaccharides by inhibiting CWDEs activities, thereby delaying blueberry softening.

In the 21st century of the information age, the rapid progress and development of computer and information technology have brought about the innovation of educational technology, and some advanced teaching methods have emerged accordingly. The traditional teaching mode needs to be gradually transformed to the intelligent teaching mode. Chemistry is an important subject in middle school. The traditional chemistry classroom can not meet the requirements of new curriculum reform and quality education. In this paper, the concept, background and connotation of intelligent education were sorted out, keywords were extracted by BICOMB and SPSS25.0 software, and the research trend of intelligent education was statistically analyzed. Based on the concept of intelligent education, the teaching strategies of middle school chemistry were proposed: showing the independent learning list, cultivating the ability of personalized independent learning; Optimize problem scenarios to stimulate learning motivation; Network platform interaction, active classroom atmosphere, mobilize the enthusiasm of students; Using Internet technology to regulate experimental teaching; Complete tasks online and teach students according to their aptitude. Use educational games and comprehensive review to consolidate knowledge. Improve the quality of chemistry classroom teaching.

With the development and progress of science and the continuous development of new branches in the field of technology, great changes have taken place in the field of education and learning. Some new technologies provide timely information access for mobile learning, so that users can access information resources anytime and anywhere. Mobile learning has been applied and developed rapidly in college students. It is of great practical significance to study the influencing factors of M-learning behavior intention of Postgraduates for effectively improving their own development. Based on the theory of planned behavior, this study explores the factors that affect the behavior intention of M-learning of postgraduates. The purpose is to provide some meaningful suggestions and measures to help postgraduates better carry out m-learning. Based on the theory of behavior, the questionnaire was designed. In this study, random sampling method was used to conduct the survey. The subjects of the survey were graduate students of * * Normal University. A total of 322 questionnaires were collected. The results show that the main influencing factors of M-learning behavior intention of postgraduates are classmate influence, usefulness cognition and self-efficacy. Therefore, it is necessary to improve the understanding of these aspects in order to effectively promote m-learning behavior intention of postgraduates.

Alumina lightweight insulation bricks were prepared from alumina powders using foaming method. In this paper the influences of foam addition amount (600, 800, 1000, 1200ml/kg) on properties of Alumina lightweight insulation brick were discussed. The phase composition is analyzed by XRD and the microstructure is characterized by SEM. The results show that the bulk density of alumina lightweight insulation brick is 0.63g/cm3,cold compressive strength is 10.53MPa, linear change rate after firing is -4.5% and reheat linear change rate is -0.27%,which synthesized under 1000ml/kg foam amount after firing at 1550°C for 3h. The results indicate that the density of alumina lightweight insulation brick is reduced with the increase of foam addition amount, when the addition amount is more than 1000ml/kg, cold compressive strength decreased significantly and linear shrinkage increased obviously.

We investigated the impact of diabetes mellitus (DM) on female lower urinary tract dysfunction. We prospectively collected data of 1,640 consecutive diabetic women from the inpatient departments and outpatient clinics of urology, endocrinology, geriatrics, and nephrology in primary, secondary, and tertiary referral hospitals, rural healthcare stations, and nursing homes in Dujiangyan, China. Clinical histories were taken on an individualized basis depending on patient presentation. Urodynamics were performed in the enrolled female diabetic patients after excluding other causes of lower urinary tract dysfunction. Data on lower urinary tract symptoms and urodynamic parameters were analyzed. Ninety-three percent of diabetic women complained of lower urinary tract symptoms, and 88 % had positive urodynamic findings. Sixty-three percent presented with storage symptoms, 918 cases of which had detrusor overactivity, 787 impaired detrusor contractility, and 131 detrusor areflexia. Among the 918 patients with impaired detrusor contractility or detrusor areflexia, the mean first sensation of filling was 238.1 ml, with a mean maximum cystometric capacity of 624 ml, mean maximum flow rate of 9.6 ml/s, mean detrusor pressure at maximum flow rate of 32.4 cmH2O, and mean postvoid residual of 323 ml. Thirty-eight of 131 patients with detrusor areflexia had impaired renal function on blood chemistry test, and massive bilateral ureterohydronephrosis and “Christmas-tree-shaped” bladder in videourodynamic studies. On the whole, 95 % diabetic women had diabetic cystopathy. DM alters voiding patterns significantly, causing various lower urinary tract symptoms in a significant proportion of diabetic women. Diabetic cystopathy is a progressive condition with a spectrum of clinical symptoms and urodynamic findings. The prevalence of diabetic cystopathy is very high in Dujiangyan, China.

The extracts of thoracic ganglion from adult Macrobrachium rosenbergii were chromatographed on a Sephadex G-50 column, the resulting second peak was further isolated by HPLC, and 9 fractions were obtained. Among the fractions only the first fraction significantly increased the oocyte diameter in vitro of the stage ovary in M. rosenbergii. The increasing effects were depended on the protein concentration of the fraction for culture. The molecular weight of the substance in the fraction 1 was about 1.3kDa.The results show that the thoracic ganglion of M. rosenbergii can secrete peptide hormone which stimulates the oocyte development of the prawn.

The energy consumption of buildings from construction to operation accounts for nearly 45% of the total energy consumption, so the energy saving and emission reduction in building field has a long way to go. Taking consumer demand as the starting point combined with current energy consumption and management situation of commercial housing in our country, this article explores ways to realize energy saving and emission reduction effectively by contract energy management in civil building field with the purpose to promote the concept of green consumption and the implementation of green building.

The paper introduced a novel on-line fault diagnosis system model of the hydropower units based on multi-agent system. In allusion to the classical MAS-based fault diagnosis model, it proposes a new function of information interactive between the mission-controlled subsystem and the task decomposition subsystem to increase the transmission rate of control signals and designs the status-monitoring subsystem to detect the abnormal signals directly from local to increase the fault diagnostic sensitivity. In the fault-diagnosis subsystem, a multi-agent interactive parallel structure is designed to meet the requirements of the high reliability and good real-time. A java-based language so called as JAFMAS is used to build a multi-agent cooperation platform. Experimental results show the effectiveness and feasibility of the proposed method.

The dynamic performance of heat assisted magnetic recording (HAMR) on different media is investigated. Signal and signal-to-noise ratio enhancement are achieved in high coercivity perpendicular media with the aid of laser heating. Linear recording density is increased while saturation write current is lowered. Trailing field partial erasure is observed in lower coercivity media with a ring head, which causes signal reduction with increasing write current or application of a laser. Precautions should be taken against partial erasure in overall recording system optimization of HAMR in order to achieve ultrahigh recording density.