Half canal wall down tympanomastoidectomy.

Objective: The purpose of this study is to analyse the effect of half canal wall down tympanomastoidectomy in the treatment of chronic otitis media or cholesteatoma.

Method: In this retrospective study, the half canal wall down tympanomastoidectomy technique was used at our hospital for chronic otitis media or cholesteatoma removal in 265 adult patients, representing 271 operated ears, with an average follow-up time of 8.4 years.

Thermal analysis technology to utilize waste biomass and waste heat to produce high-quality combustible gas through simulations and experiments.

To ensure the proper utilization of waste biomass (WB) and high-temperature waste heat, this study proposes a new method for obtaining gaseous fuels by pyrolyzing WB and using waste heat in the converter vaporization cooling flue (CVCF). This study is theoretically based on the simulation software Factsage 6.1 and the release patterns of the gaseous products including CO, H, CH and CO obtained from waste biomass, were studied at different temperatures and pressures.

Forest Environmental Carrying Capacity Based on Deep Learning.

In this paper, we proposed an assessment system of forest environmental carrying capacity from many aspects and comprehensively evaluated and predicted the forest environmental carrying capacity of 40 cities in the Yangtze River Delta of China by using the proposed deep learning-based model. In addition, the proposed model is used to dynamically evaluate the comprehensive scores of forest environmental carrying capacity of 34 provinces and cities in China between 2015 and 2020. This paper also has the following contributions: (1) a deeply integrated unidirectional bidirectional LSTM considering the correlation of time series is proposed.

Reversible on-off switching of Dy(III) single-molecule magnets single-crystal-to-single-crystal transformation.

While the interest in single-molecule magnets (SMMs) lies in their potential applications in information storage and quantum computing, the switching of their slow magnetic relaxation associated with dynamic crystal-to-crystal transformation is insufficiently exploited. Herein, three pentagonal-bipyramidal (PBP) Dy(III) complexes, [Dy(Bcpen)(Cl)] (1), [Dy(Bcpen)(OPhClNO)] (2) and [Dy(Bcpen)(OPhClNO)]·0.5CHCN (2·CH3CN), are successfully assembled, and structurally and magnetically studied (Bcpen = ,-bis(4-chloro-2-methylenepyridinyl) ethylenediamine and ClNOPhOH = 2,6-dichloro-4-nitrophenol).

pH-Dependent formation of three porous In(III)-MOFs: framework diversity and selective gas adsorption.

pH-Dependent self-assembly and structural transformation have been observed in a series of porous In(III)-MOFs, HO[In(pta)(OH)]·10HO (NXU-1), [In(pta)]·CHN (NXU-2) and [In(pta)]·CHN (NXU-3) (Hpta = 2-(4-pyridyl)-terephthalic acid). The structural diversities of NXU-1-3 reveal that the pH value of the reaction plays a key role in the assembly of In-MOFs. NXU-1 with excellent stability exhibits highly selective CO adsorption over CH as compared to NXU-2 and NXU-3, owing to the presence of abundant multiple active sites unveiled by theoretical calculations.

Two mesoporous anionic metal-organic frameworks for selective and efficient adsorption of a cationic organic dye.

Anionic metal-organic frameworks (MOFs) are beginning to have a great impact in the field of absorption and separation of ionic organic molecules due to the enhanced electrostatic interactions between their anionic frameworks and counter-ionic guests. Herein, the rational design and synthesis of two mesoporous anionic MOFs, [Zn(ITTC)](Me NH)·3DMF·HO (1) and [Cd(ITTC)](MeNH)·2DMF (2), where HITTC = 4,4',4''-(1-imidazole-2,4,5-triyl) tribenzoic acid, is reported. Structural analysis revealed that both materials are anionic MOFs with a 2-fold interpenetrating three dimensional (3D) framework.

The Impact of FDI on Urban PM Pollution in China: The Mediating Effect of Industrial Structure Transformation.

With the rapid growth of foreign direct investment (FDI), PM pollution in Chinese cities is increasing. Based on panel data for 271 Chinese cities from 2003 to 2016, this paper uses the dynamic spatial fixed-effects Durbin model to analyze the correlation between FDI and PM pollution and the effect of FDI on urban PM concentrations, as mediated by industrial structure transformation, which is clarified using Stata/SE 16.0.

[Causes analysis of mastoid cavity infection after mastoidectomy and key techniques of revision mastoidectomy].

To analyze the causes of infected mastoid cavity after mastoidectomy and explore the key techniques of revision mastoidectomy. Ninety-two patients, who underwent revision mastoidectomy due to mastoid cavity infection after mastoidectomy were retrospectively analyzed. There were 56 cases of canal wall up mastoidectomy plus tympanoplasty and 36 cases of canal wall down mastoidectomy plus tympanoplasty in previous surgery.

Solvent-Free Lithium/Sodium-Based Metal-Organic Frameworks with Versatile Nitrogen-Rich Ligands: Insight for the Design of Promising Superheat-Resistant Explosives.

Energetic metal-organic frameworks (EMOFs) are very promising as heat-resistant explosives, affording both thermal stability and energy properties. In this work, the self-assembly of high-energy nitrogen-rich linkers with nontoxic alkali-metal lithium/sodium leads to four new solvent-free EMOFs. Because of unparalleled decomposition temperature ( = 403 °C) and heats of detonation (3.

High-quality syngas production: The green and efficient utilization of waste tire and waste heat from the steelmaking converter process.

This study proposes a new technology in which waste tire powders are injected into a converter vaporization cooling flue for gas recovery via pyrolysis using high-temperature waste heat. The higher temperature pyrolysis behavior of waste tire powder under different heating rates was investigated using a TG-MS technique. A drop tube furnace was used to simulate the converter vaporization cooling flue to investigate the effect of high temperatures on waste tire powder pyrolysis.

A dual-sensitized luminescent europium(iii) complex as a photoluminescent probe for selectively detecting Fe.

A new luminescent Eu complex, namely [Eu(BTFA)(OMe)(dpq)] (1), in which BTFA = 3-benzoyl-1,1,1-trifluoroacetone and dpq = dipyrido [3,2-:2',3'-] quinoxaline, has been designed and synthesized by employing two different ligands as sensitizers. Crystal structure analysis reveals that complex 1 is composed of dinuclear Eu units crystallized in the monoclinic 1̄ space group. Notably, 1 exhibits high thermal stability up to 270 °C and excellent water stability.

Visualization and high sensitivity detection of Fe and Cu based on glutathione functionalized gold nanoclusters.

In this paper, a glutathione functionalized gold nanocluster (GSH-AuNCs) was prepared. GSH-AuNCs can catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide to produce a blue-green ox-TMB. By using its peroxidase activity and the GSH-AuNCs-TMB-HO system, the visualization of Fe and Cu and the high sensitivity detection of Fe and Cu can be realized according to the change of absorbance value and color of the system.

A New Surgical Technique Used for Correction of Congenital Blepharoptosis.

Background: Blepharoptosis is defined as the drooping or lower displacement of the upper eyelids. Various kinds of surgical techniques and modifications have been introduced to improve the surgical outcomes, but the high recurrence rate and unsatisfying cosmetic results remain as a common problem.

Purpose: To solve the problem mentioned above, we came up with our new surgical technique and conducted a retrospective review to verify its effectiveness.

self-assembly of NiS/MnS/CuS/reduced graphene composite on nickel foam for high power supercapacitors.

Transition metal sulfides (TMS), as promising electroactive materials for asymmetric supercapacitors, have been limited due to their relatively poor conductivity and cycle stability. Here ternary NiS/MnS/CuS composites were assembled on nickel foam (NF) using a hydrothermal method electrostatic adsorption of Ni, Mn and Cu ions on a reduced graphene (rGO) nanosheet template. The chemical structure was characterized by various analytic methods.

Randomized clinical trial to evaluate the outcome of partial canal wall preserved tympanomastoidectomy.

Background: The main surgical techniques for the treatment of chronic otitis media so far, all have their characteristic advantages and disadvantages. Otolaryngologists have been trying to find an ideal surgical method for chronic otitis media.

Objective: To study and evaluate the outcome of partial canal wall preserved tympanomastoidectomy (PCM) for the treatment of chronic otitis media.

Enhancing Energetic Performance of Multinuclear Ag(I)-Cluster MOF-Based High-Energy-Density Materials by Thermal Dehydration.

It is an enormous challenge to construct high-energy-density materials meeting simultaneously requirements of high energy and excellent stability. In this work, the reaction of a Ag(I) ion with a nitrogen-rich ligand, 1 H-tetrazole-5-acetic acid (Htza), leads to a novel Ag7-cluster metal-organic framework, [Ag(tza)(Htza)(Htza)(HO)] (1), with remarkable high-energy content, stability, and insensitivity. Dramatically, the heating-dehydrated process of 1 produces a new stable energetic material, [Ag(tza)(Htza)(Htza)] (1a), which features superior energy and undiminished safety performance compared to those of 1.

A difunctional azido-cobalt(ii) coordination polymer exhibiting slow magnetic relaxation behaviour and high-energy characteristics with good thermostability and insensitivity.

A novel one-dimensional azido-cobalt(ii) compound, [Co2(1-mbt)2(N3)4]n (1) (1-mbt = 1-((2-propyl-imidazol-1-yl)methyl)-benzo[1,2,3]triazole), was solvothermally synthesized. X-ray crystal structure analysis demonstrates that two crystallographically independent Co(ii) atoms in the asymmetrical unit of compound 1 exhibit a rectangular pyramid geometry. The 3D supermolecular network of 1 consists of well-isolated 1D metal chains in which the azido bridging ligands assume an unusual pattern of combination with the Co(ii) centre as the sign of [-EE-EO-EO-EO-]n.

[Progress of monitoring methods and preventions of disorder of blood supplying of expanded flaps].

Objective: To summarize the monitoring methods and preventions of the disorder of blood supplying of expanded flaps, so as to provide some references for improving the survival of expanded flaps.

Methods: The domestic and abroad related literature about the disorder of blood supplying of expanded flaps was reviewed and analyzed.

Results: Handheld Doppler, digital subtraction angiography, computer tomographic angiography, magnetic resonance angiography, and fluorescein angiography can be used as reliable preoperative imaging methods in designing expanded flaps with rich blood supply.

A substituent effect of phenylacetic acid coligand perturbed structures and magnetic properties observed in two triple-bridged azido-Cu(ii) chain compounds with ferromagnetic ordering and slow magnetic relaxation.

Based on two fluoro-substituted phenylacetate isomers, o-fluorophenylacetic acid (o-Hfpa) and p-fluorophenylacetic acid (p-Hfpa), two new Cu(ii)-azido compounds, [Cu(o-fpa)(N)(CHOH)] (1) and [Cu(p-fpa)(N)(CHOH)] (2), have been prepared, and structurally and magnetically characterized. Single-crystal structure analyses indicate that compounds 1 and 2 consist of 1D chain-like coordination networks in which adjacent copper cations are linked by the alternating triple-bridges of μ-1,1-azido, syn,syn-carboxylate and μ2-ethanol. For the two title compounds, the diverse charge distributions on the carboxyl groups caused by distinct substituent effects of the two phenylacetate coligands lead to the different structural parameters of intrachain Cu-Cu distances (3.

Tuning of Exchange Coupling and Switchable Magnetization Dynamics by Displacing the Bridging Ligands Observed in Two Dimeric Manganese(III) Compounds.

Two Mn(III)-based dimers, [Mn(bpad)(CHO)] (1) and [Mn(bpad)(pa)]·2HO (2) (Hbpad = N-benzoylpyridine-2-carboxamidrazone, Hpa = phthalic acid), have been assembled from a tridentate Schiff-base chelator and various anionic coligands. Noteworthily, compound 1 could be identified as a reaction precursor to transform to 2 in the presence of phthalic acid, resulting in a rarely structural conversion process in which the bridges between intradimer Mn(III) ions alter from methanol oxygen atom with μ-O mode in 1 (Mn Mn distance of 3.046 Å) to syn-anti carboxylate in 2 (Mn Mn distance of 4.

Electrostatic Potential Determined Magnetic Dynamics Observed in Two Mononuclear β-Diketone Dysprosium(III) Single-Molecule Magnets.

Two β-diketone mononuclear Dy(III) compounds, formulated as Dy(BTFA)(HO) (1) and Dy(BTFA)(bpy) (2) (BTFA = 3-benzoyl-1,1,1-trifluoroacetone, bpy = 2,2'-bipyridine), were prepared. Compound 1 can be identified to transform to 2 in the attendance of bpy coligand, when the local geometry symmetry of eight-coordinated Dy(III) ion changes from a dodecahedron (D) in 1 to a square antiprism (D) in 2. Fine-tuning structure aroused by auxiliary ligand has dramatical impact on magnetic properties of compounds 1 and 2.

Evaluation of moderate and severe blepharoptosis correction using the interdigitated part of the frontalis muscle and orbicularis oculi muscle suspension technique: A cohort study of 235 cases.

Background: Blepharoptosis is defined as an abnormally low-lying upper eyelid margin in the primary gaze, causing vertical narrowing of the palpebral fissure. It is difficult to achieve consistently satisfactory results in moderate or severe cases despite many surgical methods being available to correct them.

Methods: Between January 2001 and December 2014, a retrospective cohort study was conducted using medical records and perioperative photographs of 235 patients.

Combined effects of vitamin E and omega-3 fatty acids on protecting ambient PM-induced cardiovascular injury in rats.

Objective: This study aims to observe whether the combined treatment with vitamin E (vit E) and omega-3 polyunsaturated fatty acids (Ω-3 FA) could prevent the fine particulate matter (PM)-induced cardiovascular injury through alleviating inflammation and oxidative stress. At the same time, the appropriate combination dosage of vit E and Ω-3 FA was explored to find an optimized protective dose to protect the injury induced by PM.

Methods: The SD rats were pretreated with different concentration of vit E and Ω-3 FA separately or jointly.

Coligand modifications fine-tuned the structure and magnetic properties of two triple-bridged azido-Cu(ii) chain compounds exhibiting ferromagnetic ordering and slow relaxation.

Employing two benzoate derivatives with different numbers of non-coordinated fluoro-substituents, 2-fluorobenzoic acid (2-Hfba) and 2,6-difluorobenzoic acid (2,6-Hdfba), two new azido-copper coordination polymers, [Cu(2-fba)(N)(CHOH)] (1) and [Cu(2,6-dfba)(N)(CHOH)] (2), have been successfully isolated, and then structurally and magnetically investigated. Single crystal structure analysis demonstrates that the metal cations in the two resulting compounds are connected by the alternating triple-bridge of μ-1,1-azido, syn,syn-carboxylate and μ2-methanol, contributing to analogously linear 1D Cu(ii) chain-like motifs with slightly different intrachain and interchain geometric parameters. The fine-tuned structures lead to variant magnetic properties in the two title compounds.

[39 cases of malignant tumors originated from external and middle ear].

Objective: To describe our experience in the clinical manifestation and treatment of malignant tumors of the external and middle ear.

Method: The study reviewed 39 patients between 1994-2011 in our hospital, including 15 pinna tumors, 18 external canal tumors and 6 middle ear tumors. 23 males and 16 females were enrolled in this study.