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Samaila Muazu Bawa,Wei Xiaosheng,Wang Lei 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.1
Cement paste hydration behavior and restrained shrinkage cracks were experimentally monitored using a non-contact electrical resistivity apparatus and a novel steel crack frame respectively. The electrical resistivity measurement indicates that all the curves followed similar trend and the lowest water cement ratio paste indicates highest resistivity values and reaches inflection point earliest. The restrained shrinkage crack test demonstrated that lower water cement ratio paste cracked earliest which therefore confirmed its highest crack tendency. The time upon which all the samples initiated cracks was not very long; hence the novel steel crack frame is proved effective and alternatively convenient method of ascertaining crack tendency of cement paste. A relationship has been developed between the highest inflection time of the tested samples and the corresponding crack time. Tensile strength test and ANSYS stress simulation were also performed; the results were plotted on one graph in which the intersection point of tensile strength and ANSYS stress of a particular sample predicts its crack time. The crack initiation ages obtained are consistent to the experimental results which indicate that ANSYS numerical analysis can also be utilised to predict the crack tendency of cement paste.
Micro-Level Analysis of Marine Clay Stabilised with Polyurethane
Samaila Saleh,Nor Zurairahetty Mohd Yunus,Kamarudin Ahmad,Nazri Ali,Aminaton Marto 대한토목학회 2020 KSCE Journal of Civil Engineering Vol.24 No.3
Soil stabilisation is one type of ground improvement technique regarded as effective in minimising foundation problems associated with marine clay (MC). In this paper, in-depth micro-level analysis was conducted on MC stabilised with 8% Polyurethane (PU). The effectiveness of PU as a stabiliser was evaluated using unconfined compressive strength (UCS) tests and one-dimensional consolidation tests. Mineralogy of MC was studied using X-ray diffraction analysis (XRD). Furthermore, field emission scanning electron microscopy (FESEM) and energy dispersive spectroscopy (EDX) were used to discern the roots of improvement in the strength of MC. The result of XRD analysis identified the presence of Quartz, Montmorillonite, Calcite and Clinochlore. FESEM results discovered that MC showed crumpled, curled and flaked soil particles that have a fuzzy arrangement and cusp-like crystals in a joined fashion. The contact among the particles is surface-to-surface and surface-to-edge. The PU foam was composed of intramolecular closed cells that are non-homogeneous, non-identical, and of inconsistent average diameters of about 2.3 μm. Finally, EDX results revealed that O, C, Si, Al, Fe and N are the elements that contributed more than 96% of the composition of MC and PU.
Primary oral soft tissue angiosarcoma of the cheek: a case report and literature review
Benjamin Fomete,Modupe Samaila,Sunday Edaigbini,Rowlan Agbara,Uche Albert Okeke 대한구강악안면외과학회 2015 대한구강악안면외과학회지 Vol.41 No.5
Angiosarcoma is a rare and aggressive malignant tumor that has a poor prognosis. It represents less than 1% of all malignancies occurring in the oral cavity and salivary glands. We present a 35-year-old male with angiosarcoma of the cheek following traumatic injury and a review of the current litera- ture.
( Alhassan Usman Bello ),( Jelilat Aderonke Sulaiman ),( Madagu Samaila Aliyu ) 한국동물자원과학회(구 한국축산학회) 2016 한국축산학회지 Vol.58 No.11
Background: The current study investigates the anti-stress effects of clove (Eugenia caryophyllus) extracts (0, 200, 400, and 600 mg/kg) on serum antioxidant biomarkers, immune response, immunological organ growth index, and expression levels of acute phase proteins (APPs); ovotransferrin (OVT), ceruloplasmin (CP), ceruloplasmin (AGP), C-reactive protein (CRP), and serum amyloid-A (SAA) mRNA in the immunological organs of 63-d-old male black-meated Silkie fowls subjected to 21 d chronic heat stress at 35 ± 2 °C. Results: The results demonstrated that clove extract supplementation in the diet of Silkie fowls subjected to elevated temperature (ET) improve growth performance, immune responses, and suppressed the activities of glutathion peroxidase (GSH-Px), superoxide dismutase (SOD), catalase (CAT), and thioredoxin reductase (TXNRD); reduced serum malonaldehyde (MDA) and glutathione (GSH) concentrations when compared with fowls raised under thermoneutral condition (TC). Upon chronic heat stress and supplementation of clove extracts, the Silkie fowls showed a linear increase in GSH-Px, SOD, CAT, and TXNRD activities (P = 0.01) compared with fowls fed diets without clove extract. ET decreased (P < 0.05) the growth index of the liver, spleen, bursa of Fabricius and thymus. However, the growth index of the liver, spleen, bursa of Fabricius and thymus increased significantly (P < 0.05) which corresponded to an increase in clove supplemented levels. The expression of OVT, CP, AGP, CRP, and SAA mRNA in the liver, spleen, bursa of Fabricius and thymus were elevated (P < 0.01) by ET compared with those maintained at TC. Nevertheless, clove mitigates heat stress-induced overexpression of OVT, CP, AGP, CRP and SAA mRNA in the immune organs of fowls fed 400 mg clove/kg compared to other groups. Conclusions: The results showed that clove extracts supplementation decreased oxidative stress in the heat-stressed black-meated fowls by alleviating negative effects of heat stress via improvement in growth performance, antioxidant defense mechanisms, immunity, and regulate the expression of acute phase genes in the liver and immunological organs.
Adamu Muhammad,Luteino Lorna Hamman,Samaila Musa Chiroma,Martha Orendu Oche Attah,Nathan Isaac Dibal KOREAN PHARMACOPUNCTURE INSTITUTE 2023 Journal of pharmacopuncture Vol.26 No.4
Objectives: Epilepsy is a neurological condition characterized by repeated seizures attributable to synchronous neuronal activity in the brain. The study evaluated the effect of acetone extract of Adansonia digitata stem bark (ASBE) on seizure score, cognition, depression, and neurodegeneration as well as the level of Gamma-Aminobutyrate acid (GABA) and glutamate in Pentylenetetrazol-kindled rats. Methods: Thirty-five rats were assigned into five groups (n = 7). Groups 1-2 received normal saline and 35 mg/kg PTZ every other day. Groups 3-4 received 125 mg/kg and 250 mg/kg ASBE orally while group 5 received 5 mg/kg diazepam daily for twenty-six days. Group 3-5 received PTZ every other day, 30 mins after ASBE and diazepam. Results: The results showed that Pentylenetetrazol (PTZ) induces seizure, reduces mobility time in force swim test and decreases the normal cell number in the brain. It also significantly decreases (p < 0.05) catalase, superoxide dismutase and reduced glutathione activities compared to the ASBE pre-treated rats. Pre-treatment with ASBE reportedly decreases seizure activities significantly (p < 0.05) and increases mobility time in the force swim test. ASBE also significantly elevate (p < 0.05) the normal cell number in the hippocampus, temporal lobe, and dentate gyrus. Conclusion: ASBE reduced seizure activity and prevented depression in PTZ-treated rats. It also prevented neurodegeneration by regulating glutamate and GABA levels in the brain as well as preventing lipid peroxidation.
Hauwa Adamu Audu,Amina Ahmed,Joseph Vandi Zirahei,Nathan Isaac Dibal,Samaila Musa Chiroma 경희대학교 융합한의과학연구소 2023 Oriental Pharmacy and Experimental Medicine Vol.23 No.4
The study investigates the role of Anogeissus leiocarpus methanol stem bark extract (ALSE) on seizure, oxidative stress and cognitive performance in pentylenetetrazole (PTZ)-induced epilepsy in rat model. Thirty Wistar rats were allocated into five groups (n = 6). Groups 1 and 2 received normal saline intra-peritoneal (i.p) every day and PTZ (i.p) at 35 mg/kg every other day respectively. Groups 3–5 were given ALSE orally at (250 mg/kg and 500 mg/kg) and Diazepam at 4 mg/kg (i.p) respectively. Groups 3–5 were given PTZ (i.p) at 35 mg/kg every other day for 30 days, 30 min after ALSE and Diazepam administration. The rats were observed for seizure activities and also evaluated for cognitive functions. The rats were euthanized thereafter and the brain histology and oxidative stress biomarkers were evaluated. PTZ induction resulted into increased seizure activities leading to the development of kindling, oxidative stress, cognitive impairment and histological aberration of the hippocampus. However, pretreatment with ALSE decreased seizure activities, reversed oxidative stress and cognitive impairment and preserved hippocampal histology relative to the PTZ alone treated rats. Conclusively, ALSE was found to increase seizure latency, prevented cognitive decline, and decreased seizure activities induced by PTZ-kindling in rats. Additionally, ALSE ameliorates PTZ-induced oxidative stress and histological aberrations of the hippocampus. Hence, this study proposed that ALSE might be a promising tool for ameliorating seizure in epilepsy.