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Harpephyllum caffrum stimulates glucose uptake,abates redox imbalance and modulates purinergic and glucogenic enzyme activities in oxidative hepatic injury

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Asian Pacific Journal of Tropical Biomedicine 2022年第1期12卷 9-19页

作者： kolawole A.Olofinsan Ochuko L.Erukainure Beseni k.brian Md.Shahidul Islam Department of Biochemistry School of Life SciencesUniversity of KwaZulu-Natal(Westville Campus)Durban 4000South Africa Department of Pharmacology University of the Free StateBloemfontein 9300South Africa

Objective:To investigate the antioxidative and antidiabetic effects of Harpephyllum caffrum bark infusion as well as its effects on glucogenic and nucleotide hydrolyzing enzyme activities in FeSO4-induced oxidative stress in rat hepatic ***:Harpephyllum caffrum infusion was prepared from dried plant materials(40 g)infused in boiling water(400 mL)for 20 min at room *** antioxidative and inhibitory activities against carbohydrate digestive enzymes of the infusion were determined using established *** liver tissues of rats were used for glucose uptake assay and to evaluate the infusion’s effect on endogenous antioxidant,glucogenic,and nucleotide hydrolyzing enzyme activities in FeSO4-induced hepatic ***:The Harpephyllum caffrum infusion significantly reduced ferric iron(FRAP)and free radicals(OH•and DPPH)in a dose-dependent *** inhibitedα-amylase andα-glucosidase activities and increased glucose uptake in hepatic ***4 significantly decreased glutathione concentration,catalase,and superoxide dismutase activities while increasing malondialdehyde level,glycogen phosphorylase,fructose-1,6-bisphosphatase,and adenosine triphosphatase ***,treatment with Harpephyllum caffrum infusion reversed FeSO4-induced *** of the infusion revealed the presence of catechol,O-pyrocatechuic acid,mequinol,maltol,and glycoside ***:The Harpephyllum caffrum infusion demonstrates antidiabetic and antioxidative potentials in in vitro models of type 2 diabetes as depicted by its ability to inhibit carbohydrate digestive enzymes,mitigate oxidative imbalance,and regulate glucogenic and nucleotide hydrolyzing enzyme activities in oxidative hepatic injury.

关键词： Harpephyllum caffrum Antioxidant Oxidative injury Carbohydrate dysmetabolism

FIXED POINT THEOREMS FOR MAPPINGS SATISFYING IMPLICIT RELATION ON TWO COMPLETE AND COMPACT METRIC SPACES

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Applied Mathematics and Mechanics(English Edition) 2006年第9期27卷 1217-1222页

作者： Abdlkrim Aliouche brian Fisher Department of Mathematics University of Lari Ben M'Hidi Oum EI Bouaghi 04000 Algria Department of Mathematics University of Leicester Leicester LE1 7RHU. K.

First, the implicit relations were given. A common fixed point theorem was proved for two mappings satisfying implicit relation functions. A further fixed point theorem was proved for mappings satisfying implicit rela... 详细信息

关键词： complete metric space compact metric space fixed Points implicit relation

Experimental and modeling study of de novo formation of PCDD/PCDF on MSW fly ash

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Journal of Environmental Sciences 2007年第1期19卷 117-122页

作者： LI Xiao-dong ZHANG Ji YAN Jian-hua CEN ke-fa RYAN Shawn P GULLETT brian k LEE Chunwai State key Laboratory of Clean Energy Utilization Institute for Thermal Power Engineering Zhefiang University Hangzhou 310027 China U.S. Environmental Protection Agency Office of Research and Development National Risk Management Research Laboratory E305-01 Research Triangle Park North Carolina 27711 USA

The effect of sulfur dioxide （SO2） on the formation of polychlorinated dibenzo-p-dioxins （PCDDs） and polychlorinated dibenzofurans （PCDFs） has been studied in an entrained-flow reactor （EFR） under simulated waste combustion conditions. A chlorination model based on conditional probability was employed to evaluate the homologue patterns of PCDDs and PCDFs. Results revealed that the presence of SO2 did not alter the formation pathway although SO2 suppressed PCDD/F formation. The prediction model of PCDF showed good agreement with the experimental data （R--0.95）, whereas the prediction for PCDDs did not correlate well with the experimental data. This may be explained because potential chlorination pathways play a significant role in PCDF formation, whereas PCDDs are mainly formed through condensation reactions. Furthermore, the result indicated that the steric hindrance during formation has more effects on PCDD than on PCDF due to the symmetric molecular structures of PCDDs.

关键词： PCDDs PCDFs de novo synthesis formation chlorination model sulfur dioxide air pollution waste combustion

Magnetic relaxation behavior of a spatially closed dysprosium（Ⅲ） phthalocyaninato double-decker complex

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中国科学：化学 2012年第6期42卷 889-890页

作者： keiichi kATOH kaori UMETSU brian k. BREEDLOVE Masahiro YAMASHITA Department of Chemistry Graduate School of Science Tohoku University 6-3 Aramaki-Aza-Aoba Aoba-ku Sendai Miyagi 980-8578 Japan

The SMM properties of the spatially closed Dy(Ⅲ) double-decker Pc complex Dy(obPc)2(1), which is equivalent to a pseudo dinuclear complex, are reported. Complex 1 crystallized with ethanol in the crystal lattice in the monoclinic space group P21/n and was isomorphous with Tb(obPc)2 (3), which is arranged in a dimer structure along the b axis. The intermetallic Dy-Dy distance was determined to be 0.756 nm. χMT versus T plots for 1 decreased with a decrease in T, which suggests the existence of an antiferromagnetic (AF) interaction between the Dy3+ions. The M-H curve for 1 at 1.8 k showed magnetic hysteresis. In ac susceptibility measurements on a powder sample of 1, which were dependent on the applied ac field, indicating that 1 is an single molecule magnet (SMM), a maximum appeared at 22 k at an ac frequency (f) of 1488 Hz. The shape of the peaks drastically changed, and the peaks did not shift when an Hdclarge enough to suppress the quantum tunneling of the magnetization (QTM) was applied. The energy barrier (Δ/ηχ) was estimated to be 44 cm-1with a pre-exponential factor (τt0) of 1.6 × 10-5s from an Arrhenius plot. Our results suggest that the SMM/magnetic properties of 1 significantly change in a dc magnetic field. These relaxation mechanisms are related to the energy gap of the ground state and to QTM.

关键词：镝(Ⅲ) 空间群弛豫行为封闭磁化率测量酞菁交流电场单分子磁体

Biochar applications influence soil physical and chemical properties,microbial diversity,and crop productivity:a meta-analysis

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Biochar 2022年第1期4卷 1055-1071页

作者： Hardeep Singh brian k.Northup Charles W.Rice P.V.Vara Prasad Department of Agronomy Kansas State University2002 Throckmorton Plant Sciences Center1712 Claflin RoadManhattanKS 66506USA United States Department of Agriculture-Agricultural Research Service Grazinglands Research LaboratoryEl-RenoOK 73036USA

Biochar is a widely known soil *** we synthesize the available information on influence of biochar application on different soil properties and crop productivity using *** data on influence of biochar applications on different soil physical,chemical,microbial properties,and crop productivity were extracted from literature and statistically *** on selection criteria,59 studies from the literature published between 2012 and 2021 were selected for the *** were developed between effect size of biochar application on different soil properties and crop *** of biochar increased soil pH,cation exchange capacity,and organic carbon by 46%,20%,and 27%,respectively,with greater effects in coarse and fine-textured *** on chemical properties were variable among biochar prepared from different *** physical properties,biochar application reduced bulk densities by 29%and increased porosity by 59%.Biochar prepared at higher pyrolytic temperatures(>500℃)improved bulk density and porosity to greater extents(31%and 66%,respectively).Biochar prepared at lower pyrolytic temperatures(<500℃)had a greater effect on microbial diversity(both bacterial and fungal),with more diverse bacterial populations in medium and coarse textured soils,while fungal diversity increased in fine textured *** applications increased crop productivity only in fine and coarse textured *** effect size of biochar application on crop productivity was correlated with responses to physical properties of *** meta-analysis highlighted the need to conduct long-term field experiments to provide better explanations for changes in biochar properties as it undergoes aging,its longer-term effects on soil properties,and timing of re-application of different biochars.

关键词： Biochar Crop productivity Microbial diversity Soil physical properties Soil chemical properties

Prevention and management of post-instability glenohumeral arthropathy

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World Journal of Orthopedics 2017年第3期8卷 229-241页

作者： brian R Waterman kelly G kilcoyne Stephen A Parada Josef k Eichinger Department of Orthopaedic Surgery and Rehabilitation William Beaumont Army Medical Center Eisenhower Army Medical Center Madigan Army Medical Center

Post-instability arthropathy may commonly develop in high-risk patients with a history of recurrent glenohumeral instability,both with and without surgical *** related to anterior shoulder instability,the incidence and rates of arthritic progression may vary *** arthritic changes may be present in up to two-thirds of patients after primary Bankart repair and 30%after Latarjet procedure,with increasing rates associated with recurrent dislocation history,prominent implant position,non-anatomic reconstruction,and/or lateralized bone graft ***,the presence radiographic arthrosis does not predict poor patient-reported *** exhausting conservative measures,both joint-preserving and arthroplasty surgical options may be considered depending on a combination of patient-specific and anatomic *** procedures are optimally indicated for individuals with focal disease and may yield superior symptomatic relief when combined with treatment of combined shoulder *** more advanced secondary arthropathy,total shoulder arthroplasty remains the most reliable option,although the clinical outcomes,wear characteristics,and implant survivorship remains a concern among active,young patients.

关键词： Arthropathy Glenohumeral Dislocation Latarjet Instability

Evidence of proteins, chromosomes and chemical markers of DNA in exceptionally preserved dinosaur cartilage

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National Science Review 2020年第4期7卷 815-822页

作者： Alida M.Bailleul Wenxia Zheng John R.Horner brian k.Hall Casey M.Holliday Mary H.Schweitzer key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences CAS Center for Excellence in Life and Paleoenvironment Department of Biological Sciences North Carolina State University Department of Geology University of Lund Honors Program Chapman University Department of Pathology and Anatomical Sciences University of Missouri North Carolina Museum of Natural Sciences Department of Biology Dalhousie University

A histological ground-section from a duck-billed dinosaur nestling(Hypacrosaurus stebingeri) revealed microstructures morphologically consistent with nuclei and chromosomes in cells within calcified *** hypothesized that this exceptional cellular preservation extended to the molecular level and had molecular features in common with extant avian cartilage. Histochemical and immunological evidence supports in situ preservation of extracellular matrix components found in extant cartilage, including glycosaminoglycans and collagen type II. Furthermore, isolated Hypacrosaurus chondrocytes react positively with two DNA intercalating stains. Specific DNA staining is only observed inside the isolated cells, suggesting endogenous nuclear material survived fossilization. Our data support the hypothesis that calcified cartilage is preserved at the molecular level in this Mesozoic material, and suggest that remnants of once-living chondrocytes, including their DNA, may preserve for millions of years.

关键词： cartilage dinosaur nuclei chromosomes collagen Ⅱ DNA markers

Laparoscopic vs open partial colectomy in elderly patients:Insights from the American College of Surgeons- National Surgical Quality Improvement Program database

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World Journal of Gastroenterology 2015年第45期21卷 12843-12850页

作者： Umashankkar kannan Vemuru Sunil k Reddy Amar N Mukerji Vellore S Parithivel Ajay k Shah brian F Gilchrist Daniel T Farkas Department of Surgery Bronx-Lebanon Hospital Center

AIM: To compare the outcomes between the laparoscopic and open approaches for partial colectomy in elderly patients aged 65 years and over using the American College of Surgeons- National Surgical Quality Improvement Program(ACS NSQIP) database. METHODS: The ACS NSQIP database for the years 2005-2011 was queried for all patients 65 years and above who underwent partial colectomy. 1:1 propensity score matching using the nearest- neighbor method was performed to ensure both groups had similar preoperative comorbidities. Outcomes including postoperative complications, length of stay and mortality were compared between the laparoscopic and open groups. χ2 and Fisher's exact test were used for discrete variables and Student's t-test for continuous variables. P < 0.05 was considered significant and odds ratios with 95%CI were reported when applicable. RESULTS: The total number of patients in the ACS NSQIP database of the years 2005-2011 was 1777035. We identified 27604 elderly patients who underwent partial colectomy with complete data sets. 12009(43%) of the cases were done laparoscopically and15595(57%) were done with open. After propensity score matching, there were 11008 patients each in the laparoscopic(LC) and open colectomy(OC) cohorts. The laparoscopic approach had lower post-operative complications(LC 15.2%, OC 23.8%, P < 0.001), shorter length of stay(LC 6.61 d, OC 9.62 d, P < 0.001) and lower mortality(LC 1.6%, OC 2.9%, P < 0.001). CONCLUSION: Even after propensity score matching, elderly patients in the ACS NSQIP database having a laparoscopic partial colectomy had better outcomes than those having open colectomies. In the absence of specific contraindications, elderly patients requiring a partial colectomy should be offered the laparoscopic approach.

关键词： Colectomy Laparoscopic Outcomes Elderly National S

Mucinous nonneoplastic cyst of the pancreas: A truly novel pathological entity?

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World Journal of Gastroenterology 2005年第13期11卷 2045-2047页

作者： brian k.P.Goh Yu-Meng Tan Puay-Hoon Tan London L.P.J.Ooi Department of Surgery Department of Pathology

Recently, a novel and distinct pancreatic cystic tumor termed 'mudnous nonneoplastic' cyst was described in the literature. We report our experience with a 71-year-old female with a cystic tumor in the body of the pancreas demonstrating features suggestive of this diagnosis. We also review the literature regarding this 'novel' pathological entity and discuss critically its existence and its differential diagnoses.

关键词： Pancreatic cyst Mucinous nonneoplastic cyst Mucinous cysts Pancreatic cystic tumors Pancreas Cyst