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Factors affecting cecal intubation time during colonoscopy. Shijie Huaren Xiaohua Zazhi 2023; 31:105-112. [DOI: 10.11569/wcjd.v31.i3.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
In recent years, the morbidity and mortality of colorectal cancer (CRC) have increased significantly in China, and it has become one of the major malignancies that threaten the health of residents. Colonoscopy is the gold standard for the diagnosis of CRC. High-quality colonoscopy can effectively reduce the mortality of CRC. Cecal intubation time (CIT) is one of the indicators to reflect the quality of colonoscopy. Studies have found that many factors can affect CIT. This paper reviews the literature to identify the factors that affect CIT, such as those related to doctors, patients, assistive technologies, and equipment, in order to improve the quality of colonoscopy performed by endoscopists.
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Nano-gold-enhanced LAMP method for qualitative visual detection of Salmonella in milk. Mikrochim Acta 2022; 189:365. [PMID: 36048255 DOI: 10.1007/s00604-022-05459-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 08/09/2022] [Indexed: 10/14/2022]
Abstract
Since Salmonella can cause foodborne disease and public health safety issues and requires a robust, rapid, on-site detection method, a novel visual qualitative method with nano-gold-enhanced loop-mediated isothermal amplification (LAMP) reaction was established for detecting Salmonella in an integrated tube. During the experiment, nano-gold were used to enhance LAMP amplification, improving amplification efficiency and shortening the reaction time to within 30 min. Visual qualitative detection is achieved via negative staining, involving the addition of CuSO4 to the final products of the LAMP reaction. Ring-like white accumulation occurs in the absence of Salmonella targets but not when they are present. After completing the LAMP reaction, the integration tube was shaken gently for 1 min to observe the liquid phase system changes, realizing the closed tube detection of Salmonella. The process resolved the challenge presented by cross-contamination, false positives, and nonspecific amplification during the LAMP reaction. This method was used to detect Salmonella in milk, further highlighting its prospects in the field of rapid food safety detection.
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Management of antiplatelet drugs after gastrointestinal bleeding in patients with cardiovascular disease. Shijie Huaren Xiaohua Zazhi 2022; 30:599-604. [DOI: 10.11569/wcjd.v30.i13.599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Gastrointestinal bleeding (GIB) is one of the common clinical emergencies and is usually caused by the long-term use of antiplatelet drugs. With the increase in the prevalence of cardiovascular disease (CVD), there are a growing number of patients with GIB secondary to antiplatelet drugs. In this setting, the discontinuation and resumption of antiplatelet drugs in patients with GIB who are receiving antiplatelet drugs for CVD has become a hot research topic. This article aims to comprehensively review the management of antiplatelet drugs after GIB in patients with CVD using aspirin or P2Y12 receptor antagonist alone as well as dual antiplatelet therapy (DAPT) to guide clinical practice.
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Abstract
Colorectal cancer is a kind of malignant tumors that seriously threatens the health of Chinese people, and its morbidity and mortality rank third and fifth among malignant tumors in China, respectively. High-quality colonoscopy is an effective means of preventing colorectal cancer. Adenoma detection rate (ADR) is defined as the proportion of those who have adenomas in the total number of patients undergoing colonoscopy. With the increase of ADR, the incidence rate and mortality rate of colorectal cancer gradually decrease. Previous studies have found that ADR is affected by many factors. In this paper, we describe the factors that affect ADR from the aspects of colonoscopy, doctors, and equipment, with a purpose to strengthen the understanding of endoscopists on ADR and to increase ADR during colonoscopy.
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Acupuncture for chronic sciatica: protocol for a multicenter randomised controlled trial. BMJ Open 2022; 12:e054566. [PMID: 35580967 PMCID: PMC9114849 DOI: 10.1136/bmjopen-2021-054566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Chronic Sciatica is a disabling condition causing considerable medical, social and financial implications. Currently, there is no recognised long-term effective treatment to alleviate sciatica. Acupuncture has been widely used for treating chronic pains with persistent analgesic effects. We aim to evaluate the efficacy and safety of acupuncture for chronic sciatica with follow-up in 52 weeks. METHODS AND ANALYSIS This is a multicenter randomised sham-controlled trial. A total of 216 patients with chronic sciatica will be enrolled and randomly assigned to the acupuncture or sham acupuncture group. There will be 10 treatment sessions applied in 4 weeks with frequency decreased over time. Patients will complete follow-ups during 52 weeks. The primary outcomes are changes in leg pain intensity and disability from baseline to week 4. Secondary outcomes include back pain intensity, frequency and bothersomeness, quality of life, and global perceived effect. Adverse events will be recorded in detail. ETHICS AND DISSEMINATION Ethical approval of this trial was granted from the ethics committee of Beijing University of Chinese Medicine and all study centres (No. 2020BZYLL0803). Written informed consent will be obtained from enrolled patients. Trial results will be disseminated in peer-reviewed publications. TRIAL REGISTRATION NUMBER ChiCTR2100044585 (Chinese Clinical Trial Registry, http://www.chictr.org.cn, registered on 24 March 2021); preresults.
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Heparins for prevention and treatment of venous thromboembolism in cirrhosis: Research advances. Shijie Huaren Xiaohua Zazhi 2022; 30:381-386. [DOI: 10.11569/wcjd.v30.i9.381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Current evidence suggests that liver cirrhosis may increase the risk of venous thromboembolism (VTE). In cirrhosis, common types of VTE include portal vein thrombosis (PVT), deep vein thrombosis, and pulmonary embolism (PE). Heparins are the most commonly prescribed anticoagulants for the prevention and treatment of VTE. However, the indications, choice, dosage, and monitoring of heparins in cirrhosis remain inconclusive. This paper aims to review the advances in the research of heparins for the prevention and treatment of VTE in cirrhosis to optimize the treatment strategy.
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Vonoprazan for treatment of gastroesophageal reflux disease: Research advances. Shijie Huaren Xiaohua Zazhi 2021; 29:1248-1253. [DOI: 10.11569/wcjd.v29.i21.1248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Gastroesophageal reflux disease is a common gastrointestinal disease that can be effectively treated by drugs alone. Proton pump inhibitors are the currently mainstay drugs for the treatment of gastroesophageal reflux disease, but are insufficiently effective. Vonoprazan, which is a new type of drug that inhibits gastric acid secretion, has been employed for the management of gastroesophageal reflux disease. In this article, we comprehensively review the current evidence regarding clinical efficacy and safety of vonoprazan for the treatment of gastroesophageal reflux disease to guide the clinical decision.
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Competing hydrogen-bonding interactions in a high- Tc organic molecular-ionic crystal with evident nonlinear optical response. CrystEngComm 2021. [DOI: 10.1039/d0ce01875a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An organic molecular-ionic crystal of (TPPO–H)2SO4 exhibits moderate NLO response which is twice that of KDP and competing hydrogen-bonding interactions triggered high-Tc phase transition.
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[Research progress of acupuncture and moxibustion on axon guidance cues]. ZHEN CI YAN JIU = ACUPUNCTURE RESEARCH 2020; 45:941-4. [PMID: 33269841 DOI: 10.13702/j.1000-0607.200045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Axon guidance cues includes Slit, Semaphorin, Ephrin and Netrin. They have the function of regulating the regeneration of axons and guiding the regenerated axons to the correct target. They can affect the nervous system, cardiovascular system, and participate in the proliferation and migration of tumor cells. The current research on the influence of acupuncture and moxibustion(mainly focusing on electroacupuncture) on axon guidance cues is limited to animal experiments. Electroacupuncture can treat diseases dominated by the nervous system by regulating the expression of axon guidance cues. This review summarizes the research progress of acupuncture and moxibustion on regulating axonal guidance cues, is hoped to provide references for the mechanism of acupuncture and moxibustion in treating nervous system disease and ideas for acupuncture treatment of diseases related to axon guidance cues.
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[Efficacy comparison between laparoscopy and open surgery in the treatment of gastric gastrointestinal stromal tumors larger than 2 cm using multicenter propensity score matching method]. ZHONGHUA WEI CHANG WAI KE ZA ZHI = CHINESE JOURNAL OF GASTROINTESTINAL SURGERY 2020; 23:888-895. [PMID: 32927514 DOI: 10.3760/cma.j.cn.441530-20200616-00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the efficacy between laparoscopy and open surgery for gastric gastrointestinal stromal tumor (GIST) larger than 2 cm. Methods: A multicenter retrospective cohort study was performed. Inclusion criteria: long diameter of primary gastric GIST > 2 cm; undergoing laparoscopy or open surgery; diagnosis confirmed by postoperative pathology without distant metastasis; without preoperative targeted therapy. Clinicopathological data of 857 gastric GIST patients, including 320 in PLA General Hospital, 284 in Shanghai Renji Hospital, 175 in Wuhan Union Hospital and 78 in Tianjin Cancer Hospital, from January 2010 to May 2017 were retrospectively collected. There were 418 males and 439 females, mainly aged between 50 and 70 years old. Among 857 patients, 413 were in the laparoscopy group and 444 in the open group. The nearest neighbor matching of propensity score matching method was conducted with 1:1 matching based on tumor location and size between laparoscopy and open group to obtain samples of covariate equilibrium, and the caliper value was 0.04. The t test, χ(2) test and Wilcoxon rank test were used to compare short-term efficacy, and the Kaplan-Meier curve and log rank test were applied to compare long-term outcomes between the two groups. Results: After propensity score matching, laparoscopy group and open group both enrolled 293 cases. The baseline data, including age, gender, tumor location, tumor long diameter, NIH classification, etc. were not significantly different between the two groups (all P>0.05). Compared with the open group, the laparoscopy group had less intraoperative blood loss [<100 ml: 2.9% (155/293) vs. 36.2% (106/293), Z=-12.857, P<0.001], shorter time to postoperative feeding [(4.0±0.2) days vs. (5.3±0.9) days, t=1.505, P=0.003] and to the removal of drainage tube [(4.8±1.0) days vs. (6.5±1.0) days, t=1.847, P=0.008], and shorter postoperative hospital stay [(8.6±0.3) days vs. (10.5±0.3) days, t=4.235, P<0.001]. Subgroups analysis according to anatomical location: (1) Gastric cardia and pylorus: there were no statistically significant differences in perioperative parameters between the two groups (all P>0.05). (2) Stomach base: feeding time after surgery [(4.0±0.2) days vs. (4.5±0.2) days, t=0.512, P=0.038], drainage tube removal time [(5.1±0.4) days vs. (6.4±0.6) days, t=0.517, P=0.044], postoperative hospital stay [(8.0±0.5) days vs. (11.1±0.9) days, t=0.500, P=0.002] were all significantly shorter in the laparoscopy group as compared to the open group, while the differences in other perioperative parameters were not statistically significant (all P>0.05). (3) Lesser curvature of the stomach: the laparoscopy group had less intraoperative blood loss [<100 ml ratio: 58.1% (43/74) vs. 33.7% (25/74), Z=7.632, P=0.034], shorter gastric tube removal time [(2.7±0.2) days vs. (3.2±0.3) days, t=0.503, P=0.007], earlier postoperative passage of gas [(2.8±0.1) days vs. (3.4±0.2) days, t=0.532, P=0.030], earlier postoperative feeding [(3.6±0.2) days vs. (4.3±0.2) days, t=0.508, P=0.020], shorter drainage tube removal time [(4.2±0.4) days vs. (5.7±0.5) days, t=0.508, P=0.020] and postoperative hospital stay [(8.3±0.6) days vs. (10.7±0.3) days, t=0.502, P=0.006] as compared to the open group. (4) Great curvature of the stomach: the laparoscopy group presented less intraoperative blood loss [<100 ml ratio: 52.7% (39/74) vs. 36.5% (27/74), Z=7.681, P=0.032], earlier gastric tube removal [(2.6±0.2) days vs. (3.6±0.2) days, t=0.501, P=0.001], earlier postoperative passage of gas [(2.7±0.2) days vs. (3.4±0.2) days, t=0.501, P=0.016], earlier postoperative feeding [(3.6±0.2) days vs. (4.7±0.2) days, t=0.500, P=0.001], shorter drainage tube removal time [(4.0±0.5) days to (5.9±0.4) days, t=0.508, P=0.002] and postoperative hospital stay [(7.5±0.3) days to (9.5±0.1) days, t=0.500, P=0.001] than the open group. Subgroup analysis according to tumor size: (1) Tumor long diameter 2.0-5.0 cm: the laparoscopy group had earlier passage of gas [(2.9±0.1) days vs. (3.5±0.1) days, t=0.500, P=0.001], earlier postoperative feeding [(4.5±0.1) days vs. (5.0±0.2) days, t=0.501, P=0.013], shorter drainage tube removal time [(4.8±0.3) days vs. (6.0±0.3) days, t=0.511, P=0.008] and postoperative hospital stay [(8.1±0.4) days to (10.1±0.3) days, t=0.513, P=0.001] than the open group. (2) Tumor long diameter 5.1-10.0 cm: in the laparoscopic group, postoperative feeding time [(4.0±0.2) days vs. (4.7±0.2) days, t=0.506, P=0.015], drainage tube removal time [(4.6±0.4) days vs. (6.4±0.5)) days, t=0.501, P=0.004], postoperative hospital stay [(8.2±0.3) days vs. (10.9±0.6) days, t=0.500, P=0.001] were all shorter than those in the open group. No intraoperative and postoperative complications were observed in each group. The 5-year recurrence-free survival rates of the laparoscopy group and the open group were 95.4% and 91.6%, respectively (P=0.734), and the 5-year overall survival rates were 93.8% and 90.8% (P=0.691), respectively, and the differences were not statistically significant. Conclusions: In experienced medical centers, laparoscopic surgery for gastric GIST larger than 2 cm is safe and feasible, and can achieve comparable efficacy with open surgery. For gastric GISTs which do not locate in the greater curvature and the anterior wall of the stomach, and whose long diameter is ≤5 cm, laparoscopic surgery does not increase the risk of recurrence and metastasis, and can accelerate postoperative recovery.
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Luminescent DNAzyme and universal blocking linker Super Polymerase Chain Reaction visual biosensor for the detection of Salmonella. Food Chem 2020; 324:126859. [DOI: 10.1016/j.foodchem.2020.126859] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 04/09/2020] [Accepted: 04/17/2020] [Indexed: 02/07/2023]
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ExoIII and TdT dependent isothermal amplification (ETDA) colorimetric biosensor for ultra-sensitive detection of Hg2+. Food Chem 2020; 316:126303. [DOI: 10.1016/j.foodchem.2020.126303] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 11/22/2019] [Accepted: 01/26/2020] [Indexed: 01/01/2023]
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Tensor Network Approach to Phase Transitions of a Non-Abelian Topological Phase. PHYSICAL REVIEW LETTERS 2020; 124:130603. [PMID: 32302160 DOI: 10.1103/physrevlett.124.130603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 03/20/2020] [Indexed: 06/11/2023]
Abstract
The non-Abelian topological phase with Fibonacci anyons minimally supports universal quantum computation. In order to investigate the possible phase transitions out of the Fibonacci topological phase, we propose a generic quantum-net wave function with two tuning parameters dual with each other, and the norm of the wave function can be exactly mapped into a partition function of the two-coupled ϕ^{2}-state Potts models, where ϕ=(sqrt[5]+1)/2 is the golden ratio. By developing the tensor network representation of this wave function on a square lattice, we can accurately calculate the full phase diagram with the numerical methods of tensor networks. More importantly, it is found that the non-Abelian Fibonacci topological phase is enclosed by three distinct nontopological phases and their dual phases of a single ϕ^{2}-state Potts model: the gapped dilute net phase, critical dense net phase, and spontaneous translation symmetry breaking gapped phase. We also determine the critical properties of the phase transitions among the Fibonacci topological phase and those nontopological phases.
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The ultra-sensitive visual biosensor based on thermostatic triple step functional nucleic acid cascade amplification for detecting Zn2+. Food Chem 2019; 290:95-100. [DOI: 10.1016/j.foodchem.2019.03.134] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 03/21/2019] [Accepted: 03/25/2019] [Indexed: 12/29/2022]
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Acupuncture therapy for fibromyalgia: a systematic review and meta-analysis of randomized controlled trials. J Pain Res 2019; 12:527-542. [PMID: 30787631 PMCID: PMC6365227 DOI: 10.2147/jpr.s186227] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose Fibromyalgia (FM) can cause chronic widespread pain and seriously affect the quality of patient lives. Acupuncture therapy is widely used for pain management. However, the effect of acupuncture on FM is still uncertain. The aim of this review was to determine the effect and safety of acupuncture therapy on the pain intensity and quality of life in patients with FM. Materials and methods We searched PubMed, the Cochrane Library, Embase, the China National Knowledge Infrastructure, the Chinese Science and Technology Periodical Database, and the Chinese Biomedical Literature Database to collect randomized controlled trials (RCTs) of acupuncture for FM published before May 2018. A meta-analysis was performed according to the Cochrane systematic review method by using RevMan 5.3 software, and GRADE was used to evaluate the quality of the evidence. Results We identified 12 RCTs that compared acupuncture therapy to sham acupuncture or conventional medication. Meta-analysis showed that acupuncture was significantly better than sham acupuncture for relieving pain (MD =−1.04, 95% CI [−1.70, –0.38], P=0.002, I2=78%) and improving the quality of life (MD =−13.39, 95% CI [−21.69, –5.10], P=0.002, I2=82%), with low- to moderate-quality evidence in the short term. At follow-up in the long term, the effect of acupuncture was also superior to that of sham acupuncture. No serious adverse events were found during acupuncture. Conclusion Acupuncture therapy is an effective and safe treatment for patients with FM, and this treatment can be recommended for the management of FM.
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The synthesis and antistaphylococcal activity of N-sulfonaminoethyloxime derivatives of dehydroabietic acid. Bioorg Med Chem Lett 2018; 28:1943-1948. [PMID: 29650291 DOI: 10.1016/j.bmcl.2018.03.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 03/20/2018] [Accepted: 03/22/2018] [Indexed: 01/08/2023]
Abstract
A series of N-sulfonaminoethyloxime derivatives of dehydroabietic acid were synthesized and investigated for their antibacterial activity against Staphylococcus aureus Newman strain and multidrug-resistant strains (NRS-1, NRS-70, NRS-100, NRS-108 and NRS-271). Most of the target compounds having chloro, bromo, trifluoromethyl phenyl moiety exhibited potent in vitro antistaphylococcal activity. The meta-CF3 phenyl derivative T23 showed the highest activity with MIC of 0.39-0.78 μg/mL against S. aureus Newman, while several analogues showed similar potent antibacterial activity with MIC values between 0.78 and 1.56 μg/mL against five multidrug-resistant S. aureus. The stability of T35 in plasma of SD rat and the cellular cytotoxicity were also evaluated.
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Inside Back Cover: A Supramolecular Capsule for Reversible Polysulfide Storage/Delivery in Lithium-Sulfur Batteries (Angew. Chem. Int. Ed. 51/2017). Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201712175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Innenrücktitelbild: A Supramolecular Capsule for Reversible Polysulfide Storage/Delivery in Lithium-Sulfur Batteries (Angew. Chem. 51/2017). Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201712175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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A Supramolecular Capsule for Reversible Polysulfide Storage/Delivery in Lithium-Sulfur Batteries. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710025] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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A Supramolecular Capsule for Reversible Polysulfide Storage/Delivery in Lithium-Sulfur Batteries. Angew Chem Int Ed Engl 2017; 56:16223-16227. [DOI: 10.1002/anie.201710025] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Indexed: 11/08/2022]
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Abstract
The lithium-sulfur (Li-S) battery is a promising high-energy-density storage system. The strong anchoring of intermediates is widely accepted to retard the shuttle of polysulfides in a working battery. However, the understanding of the intrinsic chemistry is still deficient. Inspired by the concept of hydrogen bond, herein we focus on the Li bond chemistry in Li-S batteries through sophisticated quantum chemical calculations, in combination with 7 Li nuclear magnetic resonance (NMR) spectroscopy. Identified as Li bond, the strong dipole-dipole interaction between Li polysulfides and Li-S cathode materials originates from the electron-rich donors (e.g., pyridinic nitrogen (pN)), and is enhanced by the inductive and conjugative effect of scaffold materials with π-electrons (e.g., graphene). The chemical shift of Li polysulfides in 7 Li NMR spectroscopy, being both theoretically predicted and experimentally verified, is suggested to serve as a quantitative descriptor of Li bond strength. These theoretical insights were further proved by actual electrochemical tests. This work highlights the importance of Li bond chemistry in Li-S cell and provides a deep comprehension, which is helpful to the cathode materials rational design and practical applications of Li-S batteries.
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Healing High-Loading Sulfur Electrodes with Unprecedented Long Cycling Life: Spatial Heterogeneity Control. J Am Chem Soc 2017; 139:8458-8466. [PMID: 28301151 DOI: 10.1021/jacs.6b12358] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Self-healing capability helps biological systems to maintain their survivability and extend their lifespan. Similarly, self-healing is also beneficial to next-generation secondary batteries because high-capacity electrode materials, especially the cathodes such as oxygen or sulfur, suffer from shortened cycle lives resulting from irreversible and unstable phase transfer. Herein, by mimicking a biological self-healing process, fibrinolysis, we introduced an extrinsic healing agent, polysulfide, to enable the stable operation of sulfur microparticle (SMiP) cathodes. An optimized capacity (∼3.7 mAh cm-2) with almost no decay after 2000 cycles at a high sulfur loading of 5.6 mg(S) cm-2 was attained. The inert SMiP is activated by the solubilization effect of polysulfides whereas the unstable phase transfer is mediated by mitigated spatial heterogeneity of polysulfides, which induces uniform nucleation and growth of solid compounds. The comprehensive understanding of the healing process, as well as of the spatial heterogeneity, could further guide the design of novel healing agents (e.g., lithium iodine) toward high-performance rechargeable batteries.
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A Cooperative Interface for Highly Efficient Lithium-Sulfur Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:9551-9558. [PMID: 27629655 DOI: 10.1002/adma.201603401] [Citation(s) in RCA: 191] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 07/28/2016] [Indexed: 05/26/2023]
Abstract
A cooperative interface constructed by "lithiophilic" nitrogen-doped graphene frameworks and "sulfiphilic" nickel-iron layered double hydroxides (LDH@NG) is proposed to synergistically afford bifunctional Li and S binding to polysulfides, suppression of polysulfide shuttles, and electrocatalytic activity toward formation of lithium sulfides for high-performance lithium-sulfur batteries. LDH@NG enables high rate capability, long lifespan, and efficient stabilization of both sulfur and lithium electrodes.
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Enhanced Electrochemical Kinetics on Conductive Polar Mediators for Lithium-Sulfur Batteries. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605676] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Frontispiz: Enhanced Electrochemical Kinetics on Conductive Polar Mediators for Lithium-Sulfur Batteries. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201684261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Enhanced Electrochemical Kinetics on Conductive Polar Mediators for Lithium-Sulfur Batteries. Angew Chem Int Ed Engl 2016; 55:12990-12995. [DOI: 10.1002/anie.201605676] [Citation(s) in RCA: 482] [Impact Index Per Article: 60.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Indexed: 11/12/2022]
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Frontispiece: Enhanced Electrochemical Kinetics on Conductive Polar Mediators for Lithium-Sulfur Batteries. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/anie.201684261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Catalyst-Free Singlet Oxygen-Promoted Decarboxylative Amidation of α-Keto Acids with Free Amines. Org Lett 2016; 18:3114-7. [DOI: 10.1021/acs.orglett.6b01296] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
A general and effective method for the synthesis of amides through decarboxylative amidation of α-keto acids with amines has been developed.
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31
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Effects of process parameters on microstructural evolution and properties of AZ61 alloy during hot extrusion. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/1757-899x/103/1/012037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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32
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Towards Stable Lithium-Sulfur Batteries with a Low Self-Discharge Rate: Ion Diffusion Modulation and Anode Protection. CHEMSUSCHEM 2015; 8:2892-2901. [PMID: 26079671 DOI: 10.1002/cssc.201500428] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Indexed: 06/04/2023]
Abstract
The self-discharge of a lithium-sulfur cell decreases the shelf-life of the battery and is one of the bottlenecks that hinders its practical applications. New insights into both the internal chemical reactions in a lithium-sulfur system and effective routes to retard self-discharge for highly stable batteries are crucial for the design of lithium-sulfur cells. Herein, a lithium-sulfur cell with a carbon nanotube/sulfur cathode and lithium-metal anode in lithium bis(trifluoromethanesulfonyl)imide/1,3-dioxolane/dimethyl ether electrolyte was selected as the model system to investigate the self-discharge behavior. Both lithium anode passivation and polysulfide anion diffusion suppression strategies are applied to reduce self-discharge of the lithium-sulfur cell. When the lithium-metal anode is protected by a high density passivation layer induced by LiNO3 , a very low shuttle constant of 0.017 h(-1) is achieved. The diffusion of the polysulfides is retarded by an ion-selective separator, and the shuttle constants decreased. The cell with LiNO3 additive maintained a discharge capacity of 97 % (961 mAh g(-1) ) of the initial capacity after 120 days at open circuit, which was around three times higher than the routine cell (32 % of initial capacity, corresponding to 320 mAh g(-1) ). It is expected that lithium-sulfur batteries with ultralow self-discharge rates may be fabricated through a combination of anode passivation and polysulfide shuttle control, as well as optimization of the lithium-sulfur cell configuration.
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33
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Development of EST-SSR and TRAP markers from transcriptome sequencing data of the mango. GENETICS AND MOLECULAR RESEARCH 2015. [PMID: 26214472 DOI: 10.4238/2015.july.14.17] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mango is one of the most commercially important fruit crops in tropical and subtropical regions. To increase the efficiency of breeding strategies, two EST-derived marker systems were developed in the present study using information from the mango fruit transcriptome. Using simple sequence repeats, 218 of 230 primer pairs showed stable amplification for 7 mango genotypes with amplicons ranging from 84 to 160 bp; 93 of the primer pairs yielded polymorphic products. The proportion of polymorphic bands ranged from 16.67 to 100%, with a mean of 55.64%. In contrast, 86 primer pairs exhibited good amplification with clear bands for target region amplification polymorphism analysis, and a total of 66 primer combinations were polymorphic. These two novel sets of EST-derived markers will be of use in future studies of genetic diversity, genetic map construction, and marker-assisted selection in mango.
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34
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Silver-Catalyzed C(sp2)–H Functionalization/C–O Cyclization Reaction at Room Temperature. J Org Chem 2014; 80:911-9. [DOI: 10.1021/jo5024238] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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35
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Metal–organic frameworks MIL-88A hexagonal microrods as a new photocatalyst for efficient decolorization of methylene blue dye. Dalton Trans 2014; 43:3792-8. [DOI: 10.1039/c3dt52574k] [Citation(s) in RCA: 195] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Metal–organic framework MIL-88A displays an active MB dye degradation performance.
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36
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The effect of genetically modified Lactobacillus plantarum 590 on the gut health of sprague-dawley rats. IUBMB Life 2012; 64:617-27. [DOI: 10.1002/iub.1027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Accepted: 02/20/2012] [Indexed: 01/29/2023]
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37
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1D chain, 2D layer and trinuclear unit based 3D frameworks of indium(iii)-biphenyl carboxylate complexes. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.02.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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The Zn(II)-organic coordination polymers based on 2-(pyridin-4-yl)-1H-imidazole-4,5-dicarboxylate ligands: Crystal structures and luminescent properties. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2011.05.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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Mycotoxin Ochratoxin A-induced cell death and changes in oxidative metabolism of Arabidopsis thaliana. PLANT CELL REPORTS 2010; 29:153-161. [PMID: 20039043 DOI: 10.1007/s00299-009-0808-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Revised: 11/19/2009] [Accepted: 12/07/2009] [Indexed: 05/28/2023]
Abstract
We evaluated the phytotoxicity of mycotoxin ochratoxin A (OTA) from Aspergillus and Penicillium strains on Arabidopsis thaliana. The results demonstrate that the growth of Arabidopsis thaliana on media containing OTA was inhibited significantly. Moreover, OTA induced necrotic lesions in detached leaves, which are reminiscent of hypersensitive response lesions that are activated during plant-pathogen interactions and other abiotic stress factors. From our study, we can see that OTA exposure stimulated a biphasic oxidative burst in the leaves, resulting in the generation of hydrogen peroxide (H2O2) and superoxide anion radicals (O2(.-)) and in the concomitant down-regulation of antioxidant enzyme defense responses and up-regulation of lipid peroxidation. These results suggested that OTA damage might result from reactive oxygen species pathways. Our experiments provide a useful model plant system for research on OTA-induced plant cell death.
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40
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Physiological and biochemical responses of grapefruit seed extract dip on ‘Redglobe’ grape. Lebensm Wiss Technol 2009. [DOI: 10.1016/j.lwt.2008.09.002] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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41
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Synthesis and characterization of a mixed-valence hexadecavanadate cluster with half-open framework. INORG CHEM COMMUN 2009. [DOI: 10.1016/j.inoche.2008.12.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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42
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Variations of tissue DNA density and nuclear DNA content in soybean lines and their impacts on the GMO quantification. Food Control 2007. [DOI: 10.1016/j.foodcont.2006.08.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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43
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Structural, developmental and functional heterogeneity of rat GABAA receptors. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1991; 287:365-74. [PMID: 1662009 DOI: 10.1007/978-1-4684-5907-4_31] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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44
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Abstract
Two cDNAs (alpha 1 and alpha 4) from rat brain cDNA libraries encode isoforms of the alpha subunit of the GABA/benzodiazepine receptor, which differ at 30% of their amino acid residues. Northern blot analysis and in situ hybridization histochemistry show that alpha 1 and alpha 4 mRNAs have distinct sizes and distinct regional and cellular distributions in rat brain: both mRNAs are found in the cortex and hippocampus; however, only the alpha 1 mRNA is detected in the cerebellum. We injected RNA transcribed from alpha 1 and alpha 4 cDNAs into Xenopus oocytes, together with an RNA for a rat beta subunit. We obtained GABA-dependent inward currents that were reversibly blocked by picrotoxin. Picrotoxin alone, applied to oocytes producing the alpha and beta polypeptides, elicited an outward current. We suggest that these polypeptides together produce GABA-gated ion channels that can also open spontaneously.
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45
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Hot-electron transport for many-valley semiconductors by the method of nonequilibrium statistical operators. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:2997-3007. [PMID: 9944878 DOI: 10.1103/physrevb.37.2997] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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