Search results for: Flow
#33096578 2020/10/23 To Up
Antecubital Vein Cannula Position Impacts Assessment of Forearm Glucose Uptake During an Oral Glucose Challenge in Healthy Volunteers.Skeletal muscle is a major site for whole-body glucose disposal, and determination of skeletal muscle glucose uptake is an important metabolic measurement, particularly in research focussed on interventions that impact muscle insulin sensitivity. Calculating arterial-venous difference in blood glucose can be used as an indirect measure for assessing glucose uptake. However, the possibility of multiple tissues contributing to the composition of venous blood, and the differential in glucose uptake kinetics between tissue types, suggests that sampling from different vein sites could influence the estimation of glucose uptake. This study aimed to determine the impact of venous cannula position on calculated forearm glucose uptake following an oral glucose challenge in resting and post-exercise states.
Cécile Bétry, Aline V Nixon, Paul L Greenhaff, Elizabeth J Simpson
2126 related Products with: Antecubital Vein Cannula Position Impacts Assessment of Forearm Glucose Uptake During an Oral Glucose Challenge in Healthy Volunteers.2 Pieces/Box2 ml 1KG200ul 1KG1 ml 1 G200ul96 assays 100 G200ul
#33096546 2020/10/23 To Up
Inter- and intra-unit reliability of the COSMED K5: Implications for multicentric and longitudinal testing.To evaluate the intra-unit (RELINTRA) and inter-unit reliability (RELINTER) of two structurally identical units of the metabolic analyser K5 (COSMED, Rome, Italy) that allows to utilize either breath-by-breath (BBB) or dynamic mixing chamber (DMC) technology.
Kay Winkert, Rupert Kamnig, Johannes Kirsten, Jürgen M Steinacker, Gunnar Treff
1122 related Products with: Inter- and intra-unit reliability of the COSMED K5: Implications for multicentric and longitudinal testing.200ug500 Units10 mg100ug200ul25 mg1000 tests10 mg200 10 mg100 mg
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#33096527 2020/10/23 To Up
Prolonged/delayed cerebral hyperperfusion in adult patients with moyamoya disease with RNF213 gene polymorphism c.14576G>A (rs112735431) after superficial temporal artery-middle cerebral artery anastomosis.Superficial temporal artery-middle cerebral artery (STA-MCA) anastomosis is the standard surgical management for moyamoya disease (MMD), whereas cerebral hyperperfusion (CHP) is one of the potential complications of this procedure that can result in delayed intracerebral hemorrhage and/or neurological deterioration. Recent advances in perioperative management in the early postoperative period have significantly reduced the risk of CHP syndrome, but delayed intracerebral hemorrhage and prolonged/delayed CHP are still major clinical issues. The clinical implication of RNF213 gene polymorphism c.14576G>A (rs112735431), a susceptibility variant for MMD, includes early disease onset and a more severe form of MMD, but its significance in perioperative pathology is unknown. Thus, the authors investigated the role of RNF213 polymorphism in perioperative hemodynamics after STA-MCA anastomosis for MMD.
Ryosuke Tashiro, Miki Fujimura, Masahito Katsuki, Taketo Nishizawa, Yasutake Tomata, Kuniyasu Niizuma, Teiji Tominaga
1035 related Products with: Prolonged/delayed cerebral hyperperfusion in adult patients with moyamoya disease with RNF213 gene polymorphism c.14576G>A (rs112735431) after superficial temporal artery-middle cerebral artery anastomosis.1.00 flask1.00 flask500 tests500 tests1-99 mg/ml/ea price x 2100
#33096515 2020/10/13 To Up
Demand response through reject water scheduling in water resource recovery facilities: A demonstration with BSM2.The objective of this paper is to determine the importance of integrating peak demand mitigation and future energy pricing structures for process modelling of conventional water resource recovery facilities (WRRFs) when evaluating energy cost and control strategies. The well-established benchmark simulation model (BSM2) is used to monitor energy usage, and a detailed holistic study of different flow streams is performed in order to establish potential opportunities for flexible control of WRRF energy demand. Secondly, a detailed framework is introduced to optimize scheduling control strategies for the reject water stream while considering peak electricity demand avoidance as well as completing a comprehensive energy cost model based on current and anticipated future energy tariff structures. The reject water scheduling strategies, without other active controls (e.g. aeration), revealed 63.4% average peak demand mitigation and €10,755 cumulative annual energy cost savings on a 100k population equivalent WRRF without a deterioration in effluent quality. Analysis of different reject water scheduling control strategies shows that reject water scheduling can be an effective tool for energy cost optimisation under alternative electricity tariff structures. These strategies also deliver electricity peak demand mitigation.
Qipeng Liu, Recep Kaan Dereli, Damian Flynn, Eoin Casey
1358 related Products with: Demand response through reject water scheduling in water resource recovery facilities: A demonstration with BSM2.50μl40 LB0,5 ML 100 UG0,1 ML0,1 ML10 ML10 mL10 ML1mg0,5 ML
#33096503 2020/10/02 To Up
Characterization of four major degradation products in metformin by 2D LC-QTOF/MS/MS.A two-dimensional liquid chromatography coupled with quadrupole time-of-flight mass spectrometry(2D LC-QTOF/MS/MS) method was developed for the characterization of four major degradation products in metformin under acidic, basic, oxidative and 6 months accelerated conditions. A CAPCELL PAK SCX TYPE UG80 column(5 μm, 4.6 × 150 mm) was applied using 17 g/L ammonium dihydrogen phosphate adjusted to pH 3.0 by phosphoric acid as the mobile phase at a flow rate of 1.0 mL/min in the first dimension (D1), and the collected fractions further flowed to a Waters Xbridge C18 column(5 μm, 4.6 mm × 250 mm) with a mobile phase consisting of 0.1 % formic acid and acetonitrile (95:5 v/v) at the same flow rate as the second dimension(D2). Two of the impurities were never reported as the degradation of metformin, and all the four structures, as well as the proposed fragmentation patterns were inferred in this research.
Mi Luo, Liyun Zheng, Suwei Wang, Jianghua Zhu, Zhuohong Tang, Pingming Gao
1487 related Products with: Characterization of four major degradation products in metformin by 2D LC-QTOF/MS/MS.50 UG 50 UG2 mg100 assays 100ul100 μg100ug
#33096496 2020/10/20 To Up
Acute Internal Carotid Artery Occlusion Long after Carotid Revascularization by Vein Graft.We report the case of a 27-year-old woman with acute internal carotid artery occlusion long after carotid artery revascularization by vein graft. She presented with sudden unconsciousness and left hemiparesis. Her right carotid artery was revascularized with an ipsilateral internal jugular vein graft during a carotid body tumor resection 10 years ago. Computed tomography angiography revealed a right internal carotid artery terminus occlusion. Intravenous rt-PA and mechanical thrombectomy were performed, resulting in successful recanalization. Her neurological symptoms gradually recovered. When examining the embolic source, carotid ultrasonography for the vein graft showed intimal thickening, some high-echoic plaques, and lumen dilation, but no thrombus was observed. Color Doppler imaging showed laminar flow at the graft. Angiography after thrombectomy also showed pooling of contrast at the vein graft. We suspected that the blood flow stagnation at the vein graft induced thrombus formation; therefore, anticoagulation therapy was initiated. One year later, she was independent without recurrence of stroke, and anticoagulation therapy was replaced with aspirin because she went abroad. However, a carotid ultrasonography exam the following year revealed a huge thrombus at the graft. Anticoagulation therapy was resumed; subsequently, the thrombus decreased. In conclusion, we could monitor the long-term change in the vein graft by ultrasonography. Moreover, anticoagulation therapy was more effective.
Ryota Tamura, Nobuyuki Ohara, Yasutaka Murakami, Hirotoshi Imamura, Nobuyuki Sakai, Nobuo Kohara
1406 related Products with: Acute Internal Carotid Artery Occlusion Long after Carotid Revascularization by Vein Graft.1.00 flask1.00 flask100 μg100 μg100 μg100 μg100 μg100 μg100 μg100 μg100 μg100 μg
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#33096404 2020/10/07 To Up
Oral commensal bacteria differentially modulate epithelial cell death.Epithelial cell death is an important innate mechanism at mucosal surfaces, which enables the elimination of pathogens and modulates immunoinflammatory responses. Based on the antimicrobial and anti-inflammatory properties of cell death, we hypothesized that oral epithelial cell (OECs) death is differentially modulated by oral bacteria.
Tyresia White, Yelena Alimova, Vanessa Tubero Euzebio Alves, Pinar Emecen-Huja, Mohanad Al-Sabbagh, Alejandro Villasante, Jeffrey L Ebersole, Octavio A Gonzalez100ug Lyophilized100ug Lyophilized100ug Lyophilized100ug Lyophilized100ug Lyophilized100ug Lyophilized100ug Lyophilized25 TESTS100ug Lyophilized100ug Lyophilized
#33096360 2020/10/20 To Up
LXA4 protects against hypoxic-ischemic damage in neonatal rats by reducing the inflammatory response via the IκB/NF-κB pathway.Hypoxia and the resultant decreases in cerebral blood flow in the perinatal period can lead to neonatal hypoxic-ischemic (HI) brain injury, which can, in turn, cause severe disability or even death. However, the efficacy of current treatment strategies remains limited. Several studies have demonstrated that lipoxin A4 (LXA4), as one of the earliest types of endogenous lipid mediators, can inhibit the accumulation of neutrophils, arrest inflammation, and promote the resolution of inflammation. However, research on LXA4 in the nervous system has rarely been carried out. In the present study, we sought to investigate the protective effect of LXA4 on HI brain damage in neonatal rats, as well as the underlying mechanisms. Through experiments conducted using an HI animal model, we found that the LXA4 intervention promoted the recovery of neuronal function and tissue structure following brain injury while maintaining the integrity of the blood-brain barrier in addition to reducing cerebral edema, infarct volume, and inflammatory responses. Our results suggest that LXA4 interfered with neuronal oxygen-glucose deprivation insults, reduced the expression of inflammatory factors, inhibited apoptosis, and promoted neuronal survival in vitro. Finally, the LXA4 intervention attenuated HI-induced activation of inhibitor kappa B (IκB) and degradation of nuclear factor-κB (NF-κB). In conclusion, our data suggest that LXA4 exerts a neuroprotective effect against neonatal HI brain damage through the IκB/NF-κB pathway. Our findings will help inform future studies regarding the effects of LXA4 on neuroinflammation, blood-brain barrier integrity, and neuronal apoptosis.
Jin-Jin Zhu, Bin-Yuan Yu, Chang-Chang Fu, Min-Zhi He, Jiang-Hu Zhu, Bin-Wen Chen, Yi-Hui Zheng, Shang-Qin Chen, Xiao-Qin Fu, Pei-Jun Li, Zhen-Lang Lin
2380 related Products with: LXA4 protects against hypoxic-ischemic damage in neonatal rats by reducing the inflammatory response via the IκB/NF-κB pathway.12 Pieces/Box2ug1 ml
#33096352 2020/10/20 To Up
Lagopsis supina extract and its fractions exert prophylactic effects against blood stasis in rats via anti-coagulation, anti-platelet activation and anti-fibrinolysis and chemical characterization by UHPLC-qTOF-MS/MS.Lagopsis supina (Steph.) IK. -Gal. ex Knorr. has been used for centuries as an empiric treatment for blood stasis syndrome in China without scientific validation. The aim of this study was to evaluate for the first time the chemical profiling, efficacy and mechanism of L. supina ethanol extract (LS) and its four fractions (LSA∼D) in Dextran 500-induced acute blood stasis model rats. Oral administration of LS (229.0∼916.0 mg/kg) and LSC (17.6∼70.4 mg/kg) once daily for seven consecutive days significantly improved microcirculation hemodynamics function (blood flow, blood concentration and blood flow velocity), hemorheological parameters (whole blood viscosity, whole blood reduced viscosity, plasma viscosity, platelet aggregation rate, hematokrit, erythrocyte assembling index and erythrocyte deformation index), and coagulation parameters (thrombin time, prothrombin time, activated partial thromboplastin time, fibrinogen and antithrombin III). Furthermore, their markedly down-regulated thromboxane B2 and 6-keto-prostaglandin F1α levels. In addition, it significantly decreased tissue-type plasminogen activator (t-PA), urokinasetype plasminogen activator (u-PA) and plasminogen activator inhibitor-1 (PAI-1) levels, as well as PAI-1/t-PA and PAI-1/u-PA rations. In parallel, 51 chemical constituents were identified from LS based on ultra-high-performance liquid chromatography-quadrupole time-of-flight tandem mass spectrometry (UHPLC-qTOF-MS/MS), and quantitative analysis showed that the two major constituents of stachysoside A and acteoside were present in 0.90 ± 0.01 and 1.36 ± 0.01 mg/g of the L. supina whole plant, respectively. These findings suggest that LS and LSC possess prominent anti-blood stasis effect on rats by modulating the anti-coagulation, anti-platelet activation and anti-fibrinolysis, and supports the traditional folk use of this plant.
Li Yang, Junwei He
2779 related Products with: Lagopsis supina extract and its fractions exert prophylactic effects against blood stasis in rats via anti-coagulation, anti-platelet activation and anti-fibrinolysis and chemical characterization by UHPLC-qTOF-MS/MS.0.1 mg200 1 ml1000 100ul1000 TESTS/0.65ml100ul100.00 ul100ug 100 UG100 ug/vial100ug/vial
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