Carbon dioxide (CO) adsorption on solid sorbents represents a promising technology for separating carbon from different sources and mitigating anthropogenic emissions. The complete integration of carbon capture technologies in various industrial sectors will be crucial for a sustainable, low-carbon future. Despite developing new sorbents, a comprehensive strategy is essential to realize the full potential and widespread adoption of CO capture technologies, including different engineering aspects.
View Article and Find Full Text PDFEfficient hydrogen storage is essential for its use as a sustainable energy carrier. Diatomaceous earth, a high-surface-area siliceous geomaterial, shows potential as a physisorption material for hydrogen storage. This study analyzes diatomaceous earth's long-term characteristics when subjected to high-pressure hydrogen injection.
View Article and Find Full Text PDFIn this study, we employed a rapid and efficient microwave method to synthesize Metal-Organic Framework (MOF-303), which was subsequently embedded onto Palladium/Carbon (Pd/C) electrodes. The resulting hybrid material, Pd/C@MOF-303, was thoroughly characterized, and its performance in the Hydrogen Evolution Reaction (HER) was systematically investigated. The Pd/C@MOF-303 composite exhibited remarkable improvements in HER performance compared to the unmodified Pd/C electrode.
View Article and Find Full Text PDFCO capture is a useful strategy for controlling the risks associated with global warming. The design of an adsorbent is essential for clean and potentially energy-efficient adsorption-based carbon capture processes. This study reports a facile and moderately temperature single-stage combined pyrolysis and activation strategy for the synthesis of nitrogen-doped carbons for high-performance CO capture.
View Article and Find Full Text PDFIn this article, newly designed 3D porous polymers with tuned porosity were synthesized by the polycondensation of tetrakis (4-aminophenyl) methane with pyrrole to form polymer and with phenazine to form polymer. The polymerization reaction used -formaldehyde as a linker and nitric acid as a catalyst. The newly designed 3D porous polymers showed permanent porosity with a BET surface area of 575 m/g for and 389 m/g for .
View Article and Find Full Text PDFCO capture is a practical approach to mitigating the impacts of global warming. Adsorption-based carbon capture is a clean and potentially energy-efficient method whose performance greatly depends on adsorbent design. In this study, we explored the use of jute-derived carbon as a high-performance adsorbent for CO capture.
View Article and Find Full Text PDFThe design of novel porous solid sorbents for carbon dioxide capture is critical in developing carbon capture and storage technology (CCS). We have synthesized a series of nitrogen-rich porous organic polymers (POPs) from crosslinking melamine and pyrrole monomers. The final polymer's nitrogen content was tuned by varying the melamine ratio compared to pyrrole.
View Article and Find Full Text PDFA catalytic system for selective transformation of furfural into biofuel is highly desirable. However, selective hydrogenation of the C=O group over the furan ring of furfural to produce ether in one step is challenging. Here, we report the preparation of a series of magnetically recoverable FeCo@GC nano-alloys (37-40 nm).
View Article and Find Full Text PDFThe separation of oil/water emulsions has attracted considerable attention for decades due to the negative environmental impacts brought by wastewater. Among the various membranes investigated for separation, polyvinylidene fluoride (PVDF) membranes have shown significant advantages of ease of fabrication, high selectivity, and fair pore distribution. However, PVDF membranes are hydrophobic and suffer from severe fouling resulting in substantial flux decline.
View Article and Find Full Text PDFBackground: critical limb ischemia is one of the most challenging cases we face nowadays with high risk for amputation, retrograde trans-pedal angioplasty offers an alternative technique after failure of traditional ante-grade angioplasty.
Patients And Methods: 96 patients underwent trans-pedal or trans-tibial retrograde angioplasty after failure of the traditional ante-grade angioplasty with the aid of US, 21-gauge needle and 0.018 wire through sheath-less approach as a last chance for revascularization.
Background: Complex ventral hernias (VHs) represent a real challenge to both general and plastic surgeons. This study aims to compare Sublay Mesh-Only Repair to Posterior Component Separation "PCS" with Transversus Abdominis Release "TAR" in the treatment of complex ventral-wall hernias (VHs).
Methods: This a randomized, controlled, intervention, including two parallel groups: A; Sublay Mesh-Only Repair and Group B; "TAR".
The facile and environmentally friendly synthesis of porous organic polymers with designed polar functionalities decorating the interior frameworks as an excellent adsorbent for selective carbon dioxide capture and metal ion removal is a target worth pursuing for environmental applications. In this regard, two azo-linked porous organic polymers denoted man-Azo-P1 and man-Azo-P2 were synthesized in water by the azo-linking of 4,4'-diaminobiphenyl (benzidine) and 4,4'-methylenedianiline, respectively, with 1,3,5-trihydroxybenzene. The resulting polymers showed good BET surface areas of 290 and 78 m g for man-Azo-P1 and man-Azo-P2, respectively.
View Article and Find Full Text PDFComplex anal fistula (CAF) is a challenging condition for surgeons. This randomized trial aimed to compare ligation of the intersphincteric fistula tract (LIFT), modified Parks technique, and two-stage seton in the treatment of complex anal fistula in terms of the success of treatment and complications. This was a pilot randomized trial conducted in the period of January 2019 to December 2019 on adult patients with CAF who were allocated to one of three groups: LIFT, modified Parks technique, and two-stage seton.
View Article and Find Full Text PDFThe continuous carbon dioxide (CO ) gas emissions associated with fossil fuel production, valorization, and utilization are serious challenges to the global environment. Therefore, several developments of CO capture, separation, transportation, storage, and valorization have been explored. Consequently, we documented a comprehensive review of the most advanced strategies adopted in metal-organic frameworks (MOFs) for CO capture and separation.
View Article and Find Full Text PDFThis study aims to investigate the effect of replacing Ti with Zr in the SBU of MIL-125-NH . We were able to replace Ti with Zr in the mixed metal synthesis of MIL-125-NH , for the first time. After experimentally confirming the consistency in their framework structure and comparing their morphology, we related the femtosecond light dynamics with photocatalytic CO visible light conversion yield of the different variants in order to establish the composition-function relation in MIL-125 vis a vis CO reduction.
View Article and Find Full Text PDFAim: There is no standard method for the management of sacrococcygeal pilonidal disease (SPND); however, surgery remains the gold standard treatment. Wide surgical excision of the sinus is the traditional surgical treatment of SPND, yet it is associated with extended healing time and delayed recovery. This study aimed to compare the outcomes of sinus laser therapy (SiLaT) and sinus lay open in the management of SPND.
View Article and Find Full Text PDFAmong thousands of known metal-organic frameworks (MOFs), the University of Oslo's MOF (UiO-66) exhibits unique structure topology, chemical and thermal stability, and intriguing tunable properties, that have gained incredible research interest. This paper summarizes the structural advancement of UiO-66 and its role in CO capture, separation, and transformation into chemicals. The first part of the review summarizes the fast-growing literature related to the CO capture reported by UiO-66 during the past ten years.
View Article and Find Full Text PDFBackground: Treatment of anismus usually starts with biofeedback therapy and injection of botulinum toxin in the puborectalis muscle (PRM). Patients refractory to conservative treatment may require surgery. The present cohort study aimed to assess a combined technique of partial division of PRM and tailored lateral internal sphincterotomy (LIS) in treatment of anismus.
View Article and Find Full Text PDFBackground: One-anastomosis gastric bypass (OAGB) is an effective bariatric procedure that confers satisfactory weight loss and improvement in comorbidities. The present study aimed to compare OAGB with fixed bypass of the proximal 200 cm of small bowel and tailored bypass of the proximal 1/3 of bowel.
Methods: Patients with class II/III obesity underwent OAGB with either fixed bypass of the proximal two meters or tailored bypass of the proximal 1/3 of bowel.
Background: Management of rectocele is challenging. Treatment usually starts with conservative measures and may involve surgical intervention in non-responding patients. We compared the outcomes of transvaginal posterior colporrhaphy (PC) and laparoscopic ventral mesh rectopexy (LVMR) in treatment of anterior rectocele.
View Article and Find Full Text PDFNatural gas sweetening currently requires multistep, complex separation processes to remove the acid gas contaminants, carbon dioxide and hydrogen sulfide. In addition to being widely recognized as energy inefficient and cost-intensive, the effectiveness of this conventional process also suffers considerably because of limitations of the sorbent materials it employs. Herein, we report a new porous organic polymer, termed KFUPM-5, that is demonstrated to be effective in the concurrent separation of both hydrogen sulfide and carbon dioxide from a mixed gas stream at ambient conditions.
View Article and Find Full Text PDFPurpose: Laparoscopic sleeve gastrectomy (LSG) is an effective bariatric procedure, yet can be followed by complications such as staple line leak and bleeding, vomiting, and gastroesophageal reflux disease (GERD). Various attempts have been described in the literature to improve the early outcome of LSG through various measures. This study aimed to assess the impact of adding T-shaped omentoplasty to LSG on the short-term outcome of the procedure.
View Article and Find Full Text PDFSurg Laparosc Endosc Percutan Tech
February 2020
Background: Rectal prolapse can be associated with fecal incontinence (FI) that may not completely resolve after surgical treatment. We aimed to examine the utility of endoanal ultrasonography (EAUS) in identifying the pattern of anal sphincter injury in rectal prolapse and in predicting the improvement in continence state after surgical treatment.
Methods: Records of patients of rectal prolapse who underwent surgical treatment and were evaluated with EAUS before surgery were screened.