|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Modeling of miner track system during steering motion显示文摘Equipment for deep sea mining has risen from a position of virtual non-existence to a major industrial significance and in deep sea bed mining, the miner is the key equipment of the whole system that charges with the most complex and dangerous task.Evaluation of trafficability for tracked vehicles for deep sea mining is essential. Rare earth elements(REEs) are used in a wide range of modern applications. These applications are highly specific and substitutes are inferior or unknown. One possible source of the REE could be the poly-metallic nodule, at present explored in the tropical part of the Pacific Ocean. In developing miners of high performance, dynamic behaviour should be investigated under various traveling conditions. The mechanics of tracked vehicles is of continuing interest to organizations and agencies that specify design and operate tracked vehicles. Most works done are on the complete track vehicle system but in this work the research activity is aimed only at the track system with the basic aim of optimizing the track system design so that it can be manufactured by using the minimum resources. Equations and models are developed for the track system of a miner during steering motion. These equations and models could further be used for design optimization of the track system. | UMARU Samaila 刘少军 韩庆珏 | 2015 | Journal of Central South University2015，22，2： | 2 |
| 2 | Development of a Gyratory Compaction Procedure forLaterite Gravels Treated with Foamed Bitumen 显示文摘 | Namutebi May Birgisson Bjorn Bagampadde Umaru | 2013 | International Journal of Pavement Engineering ?2013，14，3： | 1 |
| 3 | Fabrication Mechanical Properties of Unidirectional Jute/PP Composites Using Jute Yarns by Film Stacking Method显示文摘 | Omar A. Khondker Umaru S. Ishiaku Asami Nakai Hiroyuki Hamada | 2005 | Journal of Polymers and the Environment2005，，2： | 1 |
| 4 | Fabrication Mechanical Properties of Unidirectional Jute/PP Composites Using Jute Yarns by Film Stacking Method显示文摘 | Omar A. Khondker Umaru S. Ishiaku Asami Nakai Hiroyuki Hamada | 2005 | Journal of Polymers and the Environment2005，，2： | 1 |
| 5 | Effect of Hibiscus sabdarif?fa calyx extract on carbon tetrachloride induced liver damage显示文摘 | Dahiru D Obi OJ Umaru H | 2003 | Biokemistri2003，15，1： | 1 |
| 6 | Growth and feed utilization of Oreochromis niloticusfingerlings fed with diets containing cassava peelings and mango seeds显示文摘 | Omoregie E Ufodike E Umaru M | 1991 | Aquabyte1991，4，2： | 1 |
| 7 | Growth and feed utilization of Oreochromis niloticus fingerlings fed with diets containing cassava peelings and mango seeds显示文摘 | Omoregie E Ufodike E Umaru M | 1991 | Aquabte1991，4，： | 1 |
| 8 | ATPSensitive Potassium Channel Activation Induces Angiogenesis In Vitro and In Vivo显示文摘 | Umaru B Pyriochou A Kotsikoris V | 2015 | J Pharmacol Exp Ther2015，354，1： | 1 |
| 9 | Growth and feed utilization of Oreoehromis nilotieus fingerlings fed with diets containing cassava peelings and mango seeds 显示文摘 | Omoregie E Ufodike EBC Umaru MS | 1991 | Aquabyte1991，4，： | 1 |
| 10 | The effect of crosslinking on the mechanical properties of polylactic acid/polycaprolactone blends 显示文摘 | Takeshi Semba Kazuo Kitagawa Umaru Semo Ishiaku | 2006 | J Applied Polymer Science2006，101，3： | 1 |
| 11 | 多级好氧工艺中分段污泥回流的试验研究显示文摘为使多级好氧工艺达到最理想的处理效果,分别在5种污泥回流试验条件下,对曝气池4段工艺的处130020424023理效果进行比较和分析研究,从而确定污泥回流至第一厌氧反应段与第二好氧反应段的最佳比例分别为22502551501510%,回流至最后一好氧反应段的最佳比例为80%。 | Alphajor Umaru Barrie 叶建峰 | 2004 | 水资源保护2004，20，1： | 0 |
| 12 | Ethanolic extract of Abrus precatorius leaves protected against mercury chloride-induced hepatocellular damage and cerebral Na+/K+-ATPase dysfunction in wistar rats显示文摘Plants are sources of medicinal compounds,and they play a crucial role in human health maintenance.Abrus precatorius is one of the important medicinal plants that have been alleged for their medicinal properties.This research unraveled the pharmacological effect of ethanolic extract of Abrus precatorius on lipid peroxidation,liver parameters,and Na^(+)/K^(+)-ATPase activity in HgCl_(2) treated wistar rats.Twenty-four(24)albino wistar rats weighing between 150-200 g were distributed into four groups of 6 animals each.Group A(control)received normal saline(0.9% NaCl),group B received 400 mg/kg of the extract only,group C received 4 mg/kg HgCl_(2) only,and group D received 400 mg/kg of extract+4 mg/kg of HgCl_(2).The treatment lasted for two weeks,and the animals were sacrificed on the 15th day.The blood,brains and livers were collected and used for assay of lipid peroxidation,liver function,and sodium pump activity.The results of liver function test revealed an elevated(P<0.05)level of serum aspartate transaminase,alanine transaminase,alkaline phosphatase,and total bilirubin in the group that received HgCl_(2) only(group C)when compared with the normal control(group A)that received normal saline only.However,the administration of extract in group D led to a marked(P<0.05)reduction in the activities of these enzymes and the level of total bilirubin when compared to the negative control(group C).On the contrary,HgCl_(2) caused a significant(P<0.05)reduction in serum total protein and albumin levels,but the extract reversed the effect of HgCl_(2) by elevating their concentrations.Nonetheless,the effect elicited by this extract is comparable to group A which received normal saline.Moreso,the result of lipid peroxidation revealed that HgCl_(2) treatment caused a marked(P<0.05)increase in the formation of lipid peroxidation adducts in both liver and brain homogenates in group C.On the contrary,administration of Abrus precatorius extract profoundly(P<0.05)inhibited HgCl_(2)-induced lipid peroxidation in group D.In addition,HgCl_(2) inhibited the activity of cerebral Na^(+)/K^(+)-ATPase,but the extract restored normalcy by increasing the activity of the enzyme in group D.Consequently,the results obtained justify the traditional use of Abrus precatorius and suggest that Abrus precatorius leaves may be used for management of liver diseases,oxidative stress-linked diseases and some neurodegenerative ailments. | Ebenezer Morayo Ale Steve Osagie Asuelimen Isaac John Umaru Bunmi Olaoluwa Olorundare Victoria Ifeoluwa Ayo Mgbede Joy Timothy Philip Shadrach | 2023 | Toxicology Advances2023，5，2： | 0 |
| 13 | Determinants of Home Lighting Fuel Choices in Rwanda:A Discrete Choice Analysis显示文摘Renewable technologies such as solar present some of the possibilities for indoor and outdoor lighting in the remotest rural Africa where grid connections may take ages.This paper examined the key determinants that drive household lighting fuel using a nationally representative sample(14,415 households)across Rwanda.Results from a multinomial probit regression show that rural location,house ownership,household wealth,and nonfarm work are some of significant factors that influence lighting fuel choices in Rwanda.Robustness of the results indicates that household wealth levels and other regional differences are likely to influence choice probability for using clean energy sources such as solar confirming the need to priotise wealth generation.The study’s findings suggest the need for joint efforts by government and non-state actors to priotise household wealth generation,promotion of non-farm activities and improvement of infrastructures to reduce rural-urban bias and differences across the regions,assuming that wealth will motivate rural households to switch to clean energy sources. | Fydess Khundi-Mkomba Umaru Garba Wali Etienne Ntagwirumugara Akshay Kumar Saha | 2020 | Journal of Energy and Power Engineering2020，14，4： | 0 |
| 14 | Effects of a glyphosate-based herbicide on the oestrous cycle of rats显示文摘Objective:To determine the effects of a glyphosate-based herbicide on the oestrous cycle of rats.Methods:Fifteen adult Wistar rats were randomly divided into three groups.Group A served as the control group,while groups B and C received 250 and 500 mg/kg of glyphosate-based herbicide orally for five oestrous cycles,respectively.Stages of oestrous cycle,oestrous cycle index,length of cycle,oestrous cycle ratio,serum estradiol and progesterone levels were determined.Results:The proestrus and oestrus stages of the glyphosate-based herbicide groups increased significantly(P<0.05),although proestrus in group C was not significantly different from the control group.There was a significant decrease in the metestrus and diestrus of the glyphosate-based herbicide groups(P<0.05).The oestrous cycle index of the glyphosate-based herbicide treated groups was altered;this was characterized by an increase in the oestrous index and a decrease in the metestrus and diestrus indexes.The proestrus index of group B increased,while that of group C decreased.The length of the cycle of the glyphosate-based herbicide groups significantly decreased from the 1st and 3rd week till the end of the study in groups B and C,respectively(P<0.05).There was a significant increase in the oestrous cycle ratio of the glyphosate-based herbicide groups compared to the control group(P<0.05).Though the estradiol and progesterone levels of the glyphosate-based herbicide groups increased and decreased,respectively,they were not significantly different from the control group.Conclusions:Glyphosate-based herbicide at the doses of 250 and 500 mg/kg can alter the pattern of the oestrous cycle in rats. | Hafsat Yazeed Idris Adewale Ayodeji Adeyeye Emmanuel Busayo Ibitoye Millicent Ladi Umaru | 2023 | Asian pacific Journal of Reproduction2023，12，3： | 0 |
| 15 | Growth indices of seeds(maize and cowpea)grown in heavy metal contaminated soil treated with ginger extract显示文摘The consumption of maize and cowpea in Africa and developing countries is high,owing to the fact that they are readily available,coupled the with nutritional benefits they provide.Growth loss has been seen in crops cultivated on heavy metal polluted soils as a consequence of alterations in physiological and biochemical processes.This study was aimed at assessing the growth indices of seeds(maize and cowpea)grown on heavy metal contaminated soil treated with ginger extracts.The study adopted a Complete Randomized Design(CRD)in which growth indices of either maize or cowpea were examined from each crop type grown on soil without any pollutant or treatment and soils with metal pollutants;with or without treatment with ginger extracts in the individual experiments.Data were analyzed using ANOVA.The results showed that ginger extract induced oxidative stress on cowpea after 10 days of cultivation with root length significantly(P≤0.05)higher on the normal control-G-M and+L-G which recorded 7.60 and 7.3 cm respectively.Patterns of growth indices noticed after 30 and 40 days of cowpea cultivation were variable showing least growth in leaf development.Highest maize root(27.00 cm),shoot(8.85 cm)and leaf(25.25 cm)development were recorded in maize grown on soil without metal contamination but treated with ginger(+G-M-positive control)after days 10,40 and 40 after cultivation.It was observed that the soil contaminated with heavy metals affected the growth pattern of the crops thereby causing stunted growth,chlorosis,discoloration and wilting.It could be concluded that cowpea performed better in shoot of both treated and untreated soils even though the values were not significantly different from that of root and leaf while maize showed a decrease in shoot even though the values for root and leaf were not significantly different. | Tatah Verwiyeh Silas Ezeonu Chukwuma Stephen Moses Adondua Abah Abu Sunday Michael Umaru John Isaac Roy Yohanna Emochone | 2023 | Toxicology Advances2023，5，4： | 0 |
| 16 | Effects of Folic Acid and Magnesium Co-Administration on Blood Glucose Levels in Streptozotocin---Induced Type l Diabetic Wistar Rats显示文摘 | Anthony Donatus Teru Goji Aliyu Mohammed YusufTanko Mohammed Umaru Kawu | 2015 | Journal of US-China Medical Science2015，12，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员