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Energetic copper(II) compound was synthesized based on 3,5-dinitrobenzoic acid (HDNBA) and imidazole (IMI), and characterized by elemental analysis and FTIR characterization. Single-crystal X-ray diffraction analysis revealed that [Cu(IMI)2(DNBA)2] (1) belongs to monoclinic, pertains to P21/c space group, β= 96.195(2) and Dc= 1.742 g cm–3. Cu(II) ion was coordinated to a plane tetragon, by two oxygen atoms and two nitrogen atoms from different DNBA ions and IMI ligands, which of them present typical monodentate coordination mode. Differential scanning calorimetry (DSC) was applied to assess the thermal decomposition behavior of 1. The non-isothermal kinetics parameters were calculated by the Kissinger’s method, Ozawa’s method and Starink’s method, respectively. Impact sensitivity and friction Sensitivity were also determined by standard method. In the end, the catalytic effects on the decomposition of ammonium perchlorate (AP), HMX and RDX of 1 were studied by DSC. All results supported the potential applications of the energetic complex 1 as additive of solid rocket propellant.

To observe the curative effect of joint administration of acupuncture, western and herbal medicines and bamboo-jar-cupping in the treatment of locomotor dysfunction in patients with apoplexy (acute phase) of wind-phlegm blocking meridian-collateral type in acute stroke patients, and its influence on some relevant laboratory indexes.A total of 100 cases of acute stroke patients of wind-phlegm blocking meridian-collateral type were recruited, and equally and randomly divided into control group and treatment group according to the random number table. The patients of both groups received treatment of conventional western medicines (for anti-platelet aggregation, blood-lipid regulation, arterial plaque-stabilization, cerebral cell protection and blood pressure-lowering), Chinese herbal medicines (for promoting blood circulation to dredge the meridian-collaterals), and acupuncture of Neiguan (PC6), Chize (LU5), Zusanli (ST36), Binao (LI14) and Sanyinjiao (SP6); and in addition, the patients of the treatment group also treated by cupping with bamboo-jar (kept for 10 min). The treatment was conducted once a day for 2 weeks. After the treatment, the National Institute of Health Stroke Scale (NIHSS), Fugl-Meyer assessment (FMA), Barthel Index (BI), and traditional Chinese medicine (TCM) syndrome score were used to assess the state of neurofunction, locomotor function, daily living ability, and TCM symptoms. The contents of serum C-reactive protein, D-dimer and blood homocysteine were detected using radical immunodiffusion, immunoturbidimetry, and enzymic methods, respectively.After the treatment, of the 50 and 50 cases in the control and treatment groups, 5 and 6 were cured, 7 and 18 experienced marked improvement, 23 and 20 were effective, and 15 and 6 ineffective, with the effective rate being significantly higher in the treatment group (88.0%) than in the control group (70.0%,Joint administration of acupuncture, western and Chinese herbal medicines and cupping can promote the recovery of nerve function, improve locomotor function, activities of daily living and quality of life, and reduce inflammatory state in acute stroke patients with wind-phlegm blocking collaterals.

Background Recent studies have focused on initial clinical and epidemiological characteristics of the coronavirus disease 2019 (COVID-19), which is the mainly revealing situation in Wuhan, Hubei. Aim This study aims to reveal more data on the epidemiological and clinical characteristics of COVID-19 patients outside of Wuhan, Zhejiang, China. Design This study was a retrospective case series. Methods Eighty-eight cases of laboratory-confirmed and three cases of clinically confirmed COVID-19 were admitted to five hospitals in Zhejiang province, China. Data were collected from 20 January 2020 to 11 February 2020. Results and discussion Of all 91 patients, 88 (96.70%) were laboratory-confirmed COVID-19 with throat swab samples that tested positive for SARS-Cov-2, three (3.30%) cases were clinically diagnosed. The median age of the patients was 50 (36.5–57) years, and female accounted for 59.34%. In this sample, 40 (43.96%) patients had contracted the disease from local cases, 31 (34.07%) patients had been to Wuhan/Hubei, eight (8.79%) patients had contacted with people from Wuhan, and 11 (12.09%) patients were diagnosed after having flown together in the same flight with no passenger that could later be identified as the source of infection. In particular within the city of Ningbo, 60.52% cases can be traced back to an event held in a temple. The most common symptoms were fever (71.43%), cough (60.44%) and fatigue (43.96%). The median of incubation period was 6 (interquartile range 3–8) days and the median time from the first visit to a doctor to the confirmed diagnosis was 1 (1–2) days. According to the chest computed tomography scans, 67.03% cases had bilateral pneumonia. Conclusions Social activity cluster, family cluster and flying alongside with persons already infected with COVID-19 were how people got infected with COVID-19 in Zhejiang.

Rationale and Objectives Using lower tube voltage can reduce the exposure to radiation and the dose of contrast agent. However, lower tube voltage is often linked to more noise and poor image quality, which create a need for more effective technology to resolve this problem. To explore the feasibility of coronary computed tomographic angiography (CCTA) in patients with obesity at low tube voltage (100 kV) and low contrast agent concentration (270 mg/mL) using iterative reconstruction. Materials and Methods A total of 48 patients with body mass index greater than 30 kg/m 2 were included and randomly divided into two groups. Group A received a traditional protocol (iopromide 370 mg/mL + 120 kV); group B received a protocol with low tube voltage (100 kV), low contrast agent concentration (270 mg/mL), and iterative reconstruction. The effective dose (ED), average attenuation values, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), the figure of merit (FOM), image quality scores, and the total iodine intake were compared. Results No significant differences in average CT attenuations, SNR, CNR, and subjective scores were noticed between the two groups ( P > 0.05), whereas the FOM of group B was significantly higher than that of group A. Effective radiation dose, total iodine, and iodine injection rate in group B were lower than those of group A ( P 0.01). Conclusions In patients with obesity, isotonic contrast agent with low iodine concentration and low-dose CCTA were feasible. Substantial reduction in radiation dose and the iodine intake could be achieved without compromising the image quality.

OBJECTIVE The aim of the study was to investigate the feasibility of low-tube-voltage computed tomography (CT) in combination with 3-dimensional adaptive iterative dose reduction (AIDR-3D) algorithm in lower extremity CT angiography. METHODS The CT data of the 120-kV group (n = 30) were reconstructed with filtered back projection (FBP) algorithm. The CT data of the 100-kV group (n = 30) were reconstructed with FBP as well as AIDR-3D algorithms. RESULTS The 100-kV group showed significantly lower dose-length product than the 120-kV group (P < 0.05). In comparison with the 120-kV and FBP protocol, the 100-kV and FBP protocol showed significantly increased vascular density and noise (P < 0.05). However, in the 100-kV group, images reconstructed with AIDR-3D showed significantly lower noise and significantly higher signal-to-noise ratio and contrast-to-noise ratio than FBP (P < 0.05). CONCLUSIONS Low-tube-voltage (100 kV) 320-row CT in combination with AIDR-3D reconstruction can significantly improve the image quality and reduce radiation dose of lower extremity CT angiography.

Based on green mining idea, this paper developed a kind of filling material with coal gangue as coarse aggregate and designed underground-preparation system with the main processes being breaking, mixing and pumping. As a result of the research, the coal gangue pollution and surface subsidence problem was effectively solved and the load of lift transportation system reduced and the cost of filling technology cut down, which meet the concept of green mining. The industrial experiment verified the safety and stability of the system which can improve enterprises economic benefits and social environmental benefits.

Seven Rhizobium strains associated with various legume species grown in different geographical regions of China were defined into four genomic groups related to Rhizobium giardinii, based upon ribosomal intergenic spacer RFLP, phylogenies of 16S rRNA and housekeeping (atpD, recA and glnII) genes, and DNA relatedness. Three strains in group I were classified as R. giardinii, as they showed high gene sequence similarities (>97 %) and DNA relatedness (64.3–67.5 %) to R. giardinii H152T. Groups II, III and IV differed from all defined Rhizobium species based upon the consensus of all analyses. As group II contained two strains that originated from two distinct populations, we propose this group as a novel species, Rhizobium herbae sp. nov., with strain CCBAU 83011T ( = LMG 25718T = HAMBI 3117T) as the type strain.

Safety is the most important thing in coal mine production. There are many kinds of hidden dangers. In order to discover and eliminate the hidden dangers, the safety supervision becomes one of the most popular methods in current coal mine safety management, but there is not an unitive and normalized flow of collection, transmission, and processing and so on links of safety supervision information. Through applying the thought of business optimization, this paper formed a set of safety supervision information flow, supplied method and technical support for the coal mine management.

A group of rhizobial strains isolated from nodules of multiple legume species grown in different geographical regions of China had identical 16S rRNA genes. Phylogenetic analysis based on the 16S rRNA gene sequences showed that the novel strains formed a subclade in the genus Rhizobium together with Rhizobium galegae, Rhizobium huautlense and Rhizobium alkalisoli, with 99.8 % gene sequence similarity between the strains. The DNA–DNA relatedness values between the representative strain CCBAU 05176T and R. galegae ATCC 43677T, R. huautlense S02T and R. alkalisoli CCBAU 01393T were 22.6 %, 8.9 % and 15.9 %, respectively. The novel strains were distinguished from recognized species of the genus Rhizobium by using a polyphasic approach, including PCR-based restriction fragment length polymorphism analysis (RFLP) of the 16S–23S intergenic spacer (IGS), phenotypic and physiological tests, sequence comparisons of housekeeping genes and cellular fatty acid profiles. Therefore, it is suggested that this group of strains represents a novel species for which the name Rhizobium vignae sp. nov. is proposed. The type strain is CCBAU 05176T (=HAMBI 3039T=LMG 25447T).

Using lower tube voltage can reduce the exposure to radiation and the dose of contrast agent. However, lower tube voltage is often linked to more noise and poor image quality, which create a need for more effective technology to resolve this problem. To explore the feasibility of coronary computed tomographic angiography (CCTA) in patients with obesity at low tube voltage (100 kV) and low contrast agent concentration (270 mg/mL) using iterative reconstruction.A total of 48 patients with body mass index greater than 30 kg/m(2) were included and randomly divided into two groups. Group A received a traditional protocol (iopromide 370 mg/mL + 120 kV); group B received a protocol with low tube voltage (100 kV), low contrast agent concentration (270 mg/mL), and iterative reconstruction. The effective dose (ED), average attenuation values, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), the figure of merit (FOM), image quality scores, and the total iodine intake were compared.No significant differences in average CT attenuations, SNR, CNR, and subjective scores were noticed between the two groups (P 0.05), whereas the FOM of group B was significantly higher than that of group A. Effective radiation dose, total iodine, and iodine injection rate in group B were lower than those of group A (P 0.01).In patients with obesity, isotonic contrast agent with low iodine concentration and low-dose CCTA were feasible. Substantial reduction in radiation dose and the iodine intake could be achieved without compromising the image quality.

The environment in coal mines is complex, and it is very difficult to study on emergency evacuation in real environment because of its particularity and complexity. A virtual reality platform was designed and developed for emergency evacuation during disasters in coal mines based on Unity 3D. And 21 participants were selected to test and evaluate on the platform. The study has shown that the platform reproduced these scenarios during disasters in coal mines, and participants were stunning with relatively good immersion. The platform proved that it can be used to study the efficiency of emergency evacuation during disasters in coal mines.

Agrobacterium sp. II CCBAU 21244 isolated from root nodules of Wisteria sinensis was verified as an endophytic bacterium by inoculation and reisolation tests. However, inoculation with a mixture of this strain and a Sinorhizobium meliloti strain could induce root nodules on W. sinensis and two other woody legumes, which do not form a symbiosis with S. meliloti alone. Rod-shaped and irregular nodules were found on the inoculated plants, in which the S. meliloti strain was detected in all of the nodules; while the Agrobacterium strain was inside of the rod-shaped nodules, or occupied only the nodule surface of the irregular globe-shaped nodules. These findings revealed novel interactions among the symbiotic bacteria, endophytic bacteria and the legume plants, although the mechanisms are still unknown.

To explore association genetic polymorphism of XPD with chromosomal damage in workers exposed to radiation.182 workers exposed to radiation for at least one year with chromosomal damage were selected as cases based on a general health examination for all workers exposed to radiation in Tangshan city. The control group without chromosomal damage was matched to case by age (within 5 years), sex, work unit, type of exposed to radiation, cumulate serve length (within 1 year) according to 1:1. The micro whole blood cultivation was used for the chromosome analysis. The chromosome aberration type and rate were observed and counted. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to examine the genotype of three XPD loci (751, 312 and 156).The frequency of XPD 751 AA in cases was higher than that in controls (P0.05). The frequency of 751 allele in case group was statistically higher than that in the control groups (P0.05). No statistical difference was found in the frequencies of XPD 312 genotype and allele between the case and control group (P0.05). 156 mutant gene type in case group was higher than that in the control groups. The frequency of 156 A allele in case group were higher than that of the control groups (P0.05). The frequency of genotype with both 751AA and 156CA or 751AA and 156AA was higher in cases than that of controls (P0.05).XPD 751AA genotype is a possible risk factor for radiation-induced chromosomal damage. XPD 156 mutant gene type is a possible risk factor for radiation-induced chromosomal damage. Individuals with both XPD 751AA and 156 (CA+AA) genotypes are susceptible to radiation-induced chromosomal damage. No association of XPD 312 polymorphism with radiation-induced chromosomal damage is found.