Combined Strategies Enable Highly Selective Light Olefins and -Xylene Production on Single Catalyst Bed.

Achieving multiple high-value-added chemical production through novel reaction processes and shape-selective catalytic strategy is the key to realizing efficient low-carbon catalytic processes. In this work, a methanol-toluene coreaction system was developed, and combined control strategies of reaction pathway guidance and shape-selective catalysis were applied for the successful production of light olefins and -xylene on single HZSM-5 catalyst bed. Cofeeding toluene additionally provides reactive and flowing aromatic hydrocarbon pool species that change the dominant reaction pathway in the complex network of the methanol reaction on HZSM-5 and promote the formation of ethylene.

The impact of time from injury to surgery on the risk of neuropathic pain after traumatic spinal cord injury.

Traumatic spinal cord injury (SCI) is a devastating neurological disorder often accompanied by neuropathic pain (NeP), significantly affecting patients' quality of life. This retrospective study aimed to investigate the impact of the time from injury to surgery on the development of NeP following traumatic SCI. Medical records of patients with traumatic SCI who underwent surgical intervention between January 2017 and January 2021 at two specialized centers were reviewed.

Accuracy and digital screw path design of TiRobot-assisted pedicle screw placement for lumbar spondylolisthesis.

Purpose: To investigate lumbar spondylolisthesis screw placement assisted by TiRobot in terms of digital screw path design, accurate implementation, and accuracy evaluation method.

Methods: In this study, we enrolled 40 patients with lumbar spondylolisthesis between December 2020 and August 2021 who underwent spine surgery at the Affiliated Hospital of PuTian University. Pre-operative computed tomography position and screw path designation, intra-operative pedicle screw placement according to pre-operative planning, and post-operative evaluation of the accuracy of screw placement were performed.

Dynamic Evolution of Aluminum Coordination Environments in Mordenite Zeolite and Their Role in the Dimethyl Ether (DME) Carbonylation Reaction.

Part of tetrahedral framework aluminum in a protonic mordenite (HMOR) will convert geometry to distorted tetrahedral and octahedral coordination. High-field Al NMR data show that more framework Al atoms at T and T sites change geometry to nonframework structures than others. These nonframework Al species preferentially reside in the side pockets, which will decrease the accessibility of acid sites in the 8-membered ring (MR) channel, impairing the dimethyl ether (DME) carbonylation reaction.

Increasing the Number of Aluminum Atoms in T Sites of a Mordenite Zeolite by Low-Pressure SiCl Treatment to Catalyze Dimethyl Ether Carbonylation.

Controlling the location of aluminum atoms in a zeolite framework is critical for understanding structure-performance relationships of catalytic reaction systems and tailoring catalyst design. Herein, we report a strategy to preferentially relocate mordenite (MOR) framework Al atoms into the desired T sites by low-pressure SiCl treatment (LPST). High-field Al NMR was used to identify the exact location of framework Al for the MOR samples.

Morphometric measurement of lower lumbar intervertebral foramina based on digital three-dimensional simulation.

Aim: This study aimed to investigate the morphology of the lower lumbar intervertebral foramina through use of a digital three-dimensional (3D) simulation model to guide the endoscope through the intervertebral foramina.

Material And Methods: Individuals without disease affecting the lumbar vertebrae underwent computed tomography (CT) scanning in the supine position. The CT images obtained were imported to medical software to reconstruct a 3D model of the lumbar vertebrae.

Proximal humeral internal locking plate combined with a custom neutral-position shoulder and elbow sling for proximal humerus fractures: A randomized study.

Objectives: The aim of this study was to investigate the effectiveness of the proximal humeral internal locking system (PHILOS) plate combined with a custom neutral-position shoulder and elbow sling for proximal humerus fractures.

Methods: A total of 112 patients with proximal humerus fractures were assigned randomly into 2 groups. Group A (n = 56) was treated by open reduction and internal fixation (ORIF) with a PHILOS plate; group B (n = 56) was treated by ORIF with a PHILOS plate in combination with the use of a custom neutral-position shoulder and elbow sling for 30 days after surgery.

Accurate placement of cervical pedicle screws using 3D-printed navigational templates : An improved technique with continuous image registration.

Objective: Accurate placement of cervical pedicle screws remains a surgical challenge. This study aimed to test the feasibility of using a novel three-dimensional (3D-)printed navigational template to overcome this challenge.

Methods: Cervical spines were scanned using computed tomography (CT).

Application of a novel 3D drill template for cervical pedicle screw tunnel design: a cadaveric study.

Purpose: To develop and validate the efficacy and accuracy of a three-dimensional (3D) computed tomography (CT) reconstructive rapid prototyping drill template for cervical pedicle screw placement.

Methods: CT thin-layer scans were obtained from 12 adult cadaveric cervical specimens and reconstructed. The ideal screw channels were chosen by analyzing the cross sections of the reconstructed 3D images.

Accurate fixation of plates and screws for the treatment of acetabular fractures using 3D-printed guiding templates: An experimental study.

Objective: To investigate the feasibility of the use of 3D-printed guiding templates for accurate placement of plates and screws for internal fixation of acetabular fractures.

Methods: 3D models of the pelvises of 14 adult cadavers were reconstructed using computed tomography (CT). Twenty-eight acetabular fractures were simulated and placement positions for plates and screw trajectories were designed.

[Clinical application of accurate placement of lumbar pedicle screws using three-dimensional printing navigational templates under Quadrant system].

Objective: To explore the feasibility and the effectiveness of the accurate placement of lumbar pedicle screws using three-dimensional (3D) printing navigational templates in Quadrant minimally invasive system.

Methods: The L spines of 12 adult cadavers were scanned using CT. The 3D models of the lumbar spines were established.

[Effectiveness of distal femoral osteotomy assisted by three-dimensional printing technology for correction of valgus knee with osteoarthritis].

Objective: To evaluate the effectiveness of distal femoral osteotomy aided by three-dimensional (3D) printing cutting block for correction of vaglus knee with osteoarthritis.

Methods: Between January 2014 and January 2016, 12 patients (15 knees) with vaglus deformity and lateral osteoarhritis underwent medial closing wedge distal femoral osteotomy. There were 5 males and 7 females, aged 30-60 years (mean, 43.

[EFFECTIVENESS OF HIGH TIBIAL OSTEOTOMY ASSISTED BY THREE- DIMENSIONAL PRINTING TECHNOLOGY FOR CORRECTION OF VARUS KNEE WITH OSTEOARTHRITIS].

Objective: To evaluate the effectiveness of high tibial osteotomy (HTO) assisted by three-dimensional (3-D) printing technology for correction of varus knee with osteoarthritis.

Methods: Between January 2014 and June 2015, 16 patients (20 knees) with varus knee and osteoarthritis underwent HTO assisted by 3-D printing technology; a locking compression plate was used for internal fixation after HTO. There were 6 males and 10 females, aged 30-60 years (mean, 45.

[Digital design of internal fixation for distal femoral fractures via 3D printing and standard parts database].

Objective: To study the method of internal fixation by the navigation embedded plate from standard parts database for the distal femoral fractures based on digital design by Mimics software with 3D printing technology, and to explore its feasibility and accuracy.

Methods: A total of 21 cases with distal femoral fractures admitted into the Department of Orthopedics, Affiliated Hospital of Putian University were included in this study. Dicom format data of lamellar CT scanning was imported into Mimics software for 3D anatomical modeling and virtual fracture reduction.

[DIGITAL DESIGN OF STANDARD PARTS DATABASE FOR PROXIMAL TIBIA FRACTURES TREATED WITH PLATING VIA THREE-DIMENSIONAL PRINTING].

Objective: To explore the method and feasibility of digital internal fixation for proximal tibia fractures using standard parts database and three-dimensional (3D) printing technology.

Methods: Ten adult lower extremity specimens were selected to take continuously thin-layer scanning. After Dicom image was imported into the Mimics software, the model of Schatzker II-VI types proximal tibia fracture was established, 2 cases each type.

A new route for the synthesis of propylene oxide from bio-glycerol derivated propylene glycol.

The synthesis of propylene oxide from propylene glycol, a derivative of bio-glycerol, was firstly realized in the presence of alkali-loaded silica catalysts to achieve 44% conversion and 70% selectivity.