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伊斯卡推出WHISPERLINE防振内孔切削刀杆

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数控机床市场 2017年第3期 78-79页

作者： rafi Ravoach

分布于世界各地的机械工程师们的日常工作中往往需要应对由振动带来的麻烦问题。为帮助解决这类难题，伊斯卡研发部门研制了应用范围广泛的能降低甚至消除振动的刀具用于应对这一富于挑战性的现象。

关键词：刀杆切削内孔防振机械工程师日常工作振动带挑战性

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企业定位战略之险

新营销 2012年第7期14卷 46-47页

作者： rafi Mohammed

美国零售业巨头彭尼（***）调整营销策略，宣称要“公平交易，天天低价”。就目前而言，我认为这个战略不可行。果然，执行新的定价战略后的第一个季度，彭尼的营业额下降了18．9％，客户数量减少了10％，客户平均消费额下降了5％。因... 详细信息

美国零售业巨头彭尼（***）调整营销策略，宣称要“公平交易，天天低价”。就目前而言，我认为这个战略不可行。果然，执行新的定价战略后的第一个季度，彭尼的营业额下降了18．9％，客户数量减少了10％，客户平均消费额下降了5％。因此，它损失了1．63亿美元（2011年第一季度它盈利6400万美元）。早在1月份，该企业首席执行官罗恩·约翰逊（Ron Johnson）曾激情高涨地宣称实施新的定价策略，为此带动股票一度超过每股43美元，而现在交易价低于30美元。

关键词：定位战略企业首席执行官营销策略公平交易定价战略定价策略美元

Prediction of Strength Properties of Soft Soil Considering Simple Soil Parameters

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Open Journal of Civil Engineering 2023年第3期13卷 479-496页

作者： Md. Janibul Hoque Md. Bayezid Ahnaf rafi Sharan Mozaher Ul Kabir Tahsin Tareque Department of Civil and Environment Engineering Islamic University of Technology Gazipur Bangladesh

Cohesion is an important soil strength parameter for the overall structure and quality of building foundations as well as slope stability. For a civil engineering project, cohesion (c) can be determined directly from mainly unconfined compression tests, direct shear tests, and triaxial tests of soil. However, it’s quite challenging to collect soil samples as there are time and cost constraints, as well as a diversity of soil deposits. Hence, this research aims to demonstrate a simplified method in order to determine the strength parameter of cohesive soil. Here, we propose an alternative solution adopting statistical correlations and machine learning techniques to establish correlations between the liquid limit, plastic limit, moisture content and %fine of soil with the strength parameter. In laboratory testing, these parameters can be obtained easily and these tests are relatively simple, quick to perform and also comparatively inexpensive. Hence, several test results were used from 100 boreholes which were soft soil or silty clay-type soil. Using the collected in-situ and lab test results of soil samples, a Multiple Linear Regression (MLR), Random Forest Regression (RFR) and Machine Learning (ML) model will be developed to establish a relationship between cohesion and the available test results. In order to assess the performances of both models, several performance indicators like: correlation coefficient (R2), mean squared error (MSE), root mean square error (RMSE), and mean average error (MAE) will be used. These correlation coefficients will be used to demonstrate the prediction capacity and accuracy of both models. It should be noted that this approach will substitute the conventional testing required for strength parameters, which is both expensive and time-consuming.

关键词： Cohesion MLR RFR ML MSE RMSE MAE

Comparative efficacy of neem and dimethyl phthalate (DMP) against malaria vector,Anopheles stephensi (diptera:culicidae)

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Asian Pacific Journal of Tropical Medicine 2008年第3期1卷 1-6页

作者： H.Vatandoos A.Khazani J.rafinejad M.Khoobdel A.Kebriai-Zadeh MR.Abai AA.Hanafi Bojd AA.Akhavan SM.Abtahi F.rafi Department of Medical Entomology and Vector Control School of Public Health & Institute of Health ResearchTehran University of Medical Sciences Department of Toxicology Faculty of PharmacologyMedical Sciences of Tehran University

Malaria is one of the most important parasitic diseases in the world which is transmitted by the Anopheles mosquitoes. There are several methods for malaria *** of them is application of repellents on skin in malarious area as an intergrated vectro management *** study evaluated two repellents of DMP as a synthtic and locally product of neem oil as a botanical repellent against Anopheles *** modified method of K & D was used for the ***/biting rates on the shaved belly of white rabbits were counted. ED50 and ED95 values were calculated by probit statistic *** of effective dose(ED50, ED90 ) on human volunteer and white rabbit was performed using regression *** and failure time of DMP and neem oil was also ***50 value of DMP and neem oil was determined as 0.0076 and 0. 159 mg/cm respectively on white *** figures of ED90 value of DMP and neem oil was determined as 0. 046 and 1.388 mg/cm^*** and neem oil showed repellency effects against *** on human volunteers with ED50 value of 0.0037 and 0.127 mg/cm^2 ***90 value of DMP was determined as 0. 032 mg/cm^*** oil exhibited a ED90 value of 1.066 mg/cm^2 on human *** protection time of 6-7 hours for DMP and 31 minute for neem oil was *** failure times for DMP and Neem was 9 hours and 65 minutes rspectively on human *** results exhibited that plant-based repellent is generally less effective than synthetic ***,use of locally made botanical materials would be of great advantages for personal protection against mosquito biting.

关键词： neem oil DMP Anopheles stephensi

Downregulation of the DST Transcription Factor Using Artificial microRNA to Increase Yield, Salt and Drought Tolerance in Rice

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American Journal of Plant Sciences 2017年第9期8卷 2219-2237页

作者： Ar-rafi Md. Faisal Sudip Biswas Tasnim Zerin Tania Rahman Zeba Islam Seraj Plant Biotechnology Laboratory Department of Biochemistry and Molecular Biology University of Dhaka Dhaka Bangladesh

Abiotic stresses like salinity and drought directly affect plant growth and water availability, resulting in lower yield in rice. So, a combination of stress tolerance along with enhanced grain yield is a major focus of rice breeding. It was reported earlier that loss in function of the drought and salt tolerance (DST) gene results in increase in grain production through downregulating Gn1a/OsCKX2 expression. Moreover, dst mutants also showed enhanced drought and salt tolerance in rice by regulating genes involved in ROS homeostasis. In the present study, we proceeded to test these reports by downregulating DST using artificial microRNA technology in the commercial but salt sensitive, high-yielding, BRRIdhan 28 (BR28). This cultivar was transformed with DST_artificial microRNA (DST_amiRNA) driven by the constitutive CaMV35S promoter using tissue culture independent Agrobacterium mediated in planta transformation. DST_amiRNA transgenic plants were confirmed by artificial microRNA specific PCR. Transformed plants at T0 generation showed vigorous growth with significantly longer panicle length and higher primary branching resulting in higher yield, compared to the wild type (WT) BR28. Semi-quantitative RT PCR confirmed the decrease in DST expression in the BR28 transgenic plants compared to WT. T1 transgenic plants also showed improvement in a number of physiological parameters and greater growth compared to WT after 14 days of 120 mM salt (NaCl) stress at seedling stage. Therefore, DST downregulated transgenic plants showed both higher stress tolerance as well as better yields. Furthermore, stable inheritance of the improved phenotype of the DST_amiRNA transgenics will be tested in advanced generations.

关键词： Drought and Salt Tolerance (DST) Transcription Factor Artificial microRNA Technology In Planta Transformation Yield Stress Tolerance

肢体缺血再灌注后肺损伤小鼠肺组织AT1R和Mas受体蛋白表达变化

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中国病理生理杂志 2017年第7期33卷 1264-1270页

作者：刘帆王枭鹰 SHAHIN Ahmed MUHAMMED rafi-N 李树民杨秀红华北理工大学基础医学院生理学系河北省慢性疾病重点实验室唐山市慢性病临床基础研究重点实验室河北唐山063000

目的:通过观察小鼠肢体缺血再灌注(LIR)后不同时点肺组织血管紧张素Ⅱ1型受体(AT1R)和Mas受体蛋白表达与肺损伤的变化,探讨局部组织AT1R和Mas受体蛋白表达失衡在LIR急性肺损伤(ALI)中的作用。方法:42只8周龄雄性ICR小鼠随机分为7组,每组... 详细信息

目的:通过观察小鼠肢体缺血再灌注(LIR)后不同时点肺组织血管紧张素Ⅱ1型受体(AT1R)和Mas受体蛋白表达与肺损伤的变化,探讨局部组织AT1R和Mas受体蛋白表达失衡在LIR急性肺损伤(ALI)中的作用。方法:42只8周龄雄性ICR小鼠随机分为7组,每组6只,其中1组作为对照组,其余6组为再灌注0.5 h、1h、2 h、4 h、6 h和12 h模型组。模型组小鼠用橡皮圈结扎双后肢根部,缺血2 h后剪断橡皮圈,分别于再灌注后不同时点眼球取血处死小鼠。取肺组织计算脏器系数和湿/干重比;肺泡灌洗液细胞计数和蛋白浓度检测;肺组织病理切片常规HE染色观察肺组织形态变化并进行病理损伤评分;Western blot检测肺组织AT1R和Mas受体蛋白的表达。结果:模型组小鼠肺脏器系数、湿/干重比、肺泡灌洗液细胞计数和蛋白浓度在LIR后显著升高。病理学结果显示,LIR后不同时点小鼠肺组织出现肺泡壁毛细血管扩张和充血、间质和肺泡水肿、血管壁和支气管壁炎症细胞浸润、肺泡间隔增厚、炎症细胞浸润及肺气肿等不同程度的损伤变化,且随着再灌注时间的延长,肺损伤评分逐渐升高。Western blot结果显示,AT1R蛋白在再灌注0.5 h时开始升高,1 h达到最高,之后随再灌注时间的延长,AT1R表达逐渐降低;Mas受体蛋白随再灌注时间延长逐渐升高。结论:LIR引起急性肺损伤,并随再灌注时间的延长损伤逐渐加重;AT1R和Mas受体蛋白表达的变化可能与小鼠LIR后急性肺损伤有关。

关键词：缺血再灌注肺损伤肾素-血管紧张素系统血管紧张素Ⅱ1型受体 Mas受体

Brazilin Content, Antioxidative and Lipase Inhibition Effects of Sappanwood （Caesa/pinia Sappan） from Indonesia

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Journal of Chemistry and Chemical Engineering 2010年第10期4卷 50-55页

作者： Irmanida Batubara Mohamad rafi Siti Sa＇diah M. Agung Zaim Susi lndariani Tohru Mitsunaga Department of Chemistry Faculty of Mathematics and Natural Sciences Bogor Agricultural University Darmaga Bogor 16880 Indonesia Biopharmaca Research Center Bogor Agricultural University Taman Kencana Bogor 16151 Indonesia Department of Applied Biological Science Faculty of Applied Biological Sciences Gifu University Gifu 501-1193 Japan

Determination of brazilin by High Performance Liquid Chromatography （HPLC） method and measurement of the antioxidative and lipase inhibition effects in the Caesalpinia sappan wood from various locations in Indonesia is described in this paper. Brazilin was separated from sample matrix using a reversed phase C 18, Shim-pack VP column with the mobile phase in a gradient elution for45 min from 5% to 100% methanol in 0.05% aqueous trifluoroacetic acid. Brazilin in ethanolic extracts ofC. sappan wood was in the range of 5.81 to 24.85 mg/g on dry-weight basis. Antioxidant and lipase inhibition activities expressed by IC50 values from all samples were in the range from 6.60 to 11.53 μg/mL and 50.76 to 203.21 μg/mL, respectively. Antioxidative and lipase inhibition potency of all ethanolic extracts were compared to vitamin C and chloramphenicol, isopropyl methylphenol and tetracyclin, respectively.

关键词： Caesalpinia sappan sappanwood brazilin antioxidant activity lipase inhibition activity HPLC.

Preparation and Characterization of Aluminium Wire Mat Reinforced Polyester Composite

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Advances in Materials Physics and Chemistry 2019年第4期9卷 48-56页

作者： Rajib Chandra Das Arif Ul Islam Sanchita Dewanjee Tanjima Akhter Farzana Sultana rafi Susmita Mondal Department of Applied Chemistry and Chemical Engineering Noakhali Science and Technology University Sonapur Noakhali Bangladesh Department of Applied Mathematics Noakhali Science and Technology University Sonapur Noakhali Bangladesh Department of Pharmacy Noakhali Science and Technology University Sonapur Noakhali Bangladesh

Aluminum wire mat reinforced polyester composite has been studied as an al-ternative structural material. The physical and mechanical properties of the composite such as tensile strength, flexural strength, water absorption, hardness illustrated the competency of the developed composite. It was found that per-cent water absorption is very low for the resultant studied composite. However, water absorption increased very slowly when metal mat layers were increased. Furthermore, mechanical strength of the composite was increased as mechanical properties: tensile strength, flexural strength, hardness and stiffness of this composite increased with the increase in the number of metal mat layer in the composite. This study suggested the use of this composite as an unbeaten al-ternative structural material to conventional materials.

关键词： Aluminum Reinforcement Polyester Matrix Metal Polyester Composite

油层物性测量在预测不同岩性或孔隙流体的地震响应中的应用

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石油物探快讯 1990年第2期7卷 79-85页

作者： rafi.,BJ 何建鹏