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Measurement of Gamma Emitting Radionuclides for Assessment, Environmental Hazards of Radiation in Rock and Soil Samples of Shabwah and Hadramout Regions, Yemen

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Journal of Geoscience and Environment Protection 2017年第5期5卷 66-75页

作者： Sherif S. Nafee Dheya al-Othmany Safia H.Q. Hamidalddin J.H. al-Zahrani W.R. alharbi Hanan M. Barashed Physics Department Faculty of Science King Abdulaziz University Jeddah Saudi Arabia Physics Department Faculty of Science Alexandria University Alexandria Egypt Nuclear Engineering Department Faculty of Engineering King Abdulaziz University Jeddah Saudi Arabia Physics Department Girls Faculty of Science King Abdulaziz University Jeddah Saudi Arabia

The natural radioactivity of 226Ra, 232Th and 40K and the fallout of 137Cs in soils and granite rocks of two regions in Yemen (Shabwah and Hadramout) were measured by using gamma-ray spectrometry (HPGe) detector. The average values of the radionuclides 226Ra, 232Th and 40K in the soil samples are 14.34, 25.78 and 566.05 Bq/kg respectively. For rock samples, the average activity concentration for 226Ra, 232Th and 40K are 45, 106 and 1235 Bq/kg respectively. Low concentration values of 137Cs in soil and rock samples under investigation, are not radiologically important. The radium equivalent activity (Raeq) and external hazard index (Hex) of all samples are less than the limits of 370 Bq·kg-1 and unity, respectively. The average values of total absorbed dose rate due to three primordial radionuclides in soil and rock samples are 46.5 nGy/h and 138.36 nGy/h, respectively, where the absorbed average value of the granite is higher than the permitted limit. So, the local people must avoid using these granite samples as the interior decorative materials of dwelling without radioactivity control.

关键词： Gamma Spectrometry Annual Effective Dose External Hazard Index

Preparation of Copper (Cu) and Copper Oxide (Cu<sub>2</sub>O) Nanoparticles under Supercritical Conditions

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Materials Sciences and Applications 2011年第8期2卷 977-980页

作者： M. Asharf Shah M. S. al-Ghamdi 不详

Temperature and pressure, both of which can affect the supersaturation and nucleation are responsible for solvents properties. In this study, we use water as solvent under supercritical conditions and report copper (Cu) and (Cu2O) nanoparticles of size ranging from 9nm to 60nms. This synthetic technique has the following advantages: Firstly, it is one step synthesis approach, making it easy to control the growth kinetics. Secondly, the synthesis needs no sophisticated equipments. Thirdly, the approach is non-toxic without producing hazardous waste as water is being used as solvent as well as source of oxygen. Forth, it is a surfactant free synthesis and has bright prospects.

关键词： Supercritical Water Copper Powder Synthesis Characterization

Reverse thinking:Tumor nutritional therapy

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BMEMat(BioMedical Engineering Materials) 2024年第3期2卷 1-3页

作者： Binbin Ding Ping'an Ma Abdulaziz A.al Kheraif Jun Lin State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchunChina School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefeiChina Dental Health Department College of Applied Medical SciencesKing Saud UniversityRiyadhSaudi Arabia

Tumor cells often exhibit metabolic abnormalities to meet the needs of rapid proliferation,and targeting tumor metabolism has become one of the effective strategies for cancer ***,most of the current methods targeting metabolism focus on inhibiting hyperactivated metabolic pathways,hindering their further application.A recent innovative work,proposed a nutrient-based strategy to reactivate metabolism for tumor therapy by targeting suppressed metabolic *** approach through delivering nutrients to tumor cells directly using nanotechnology indicates that specific nutrients can serve as potent activators of metabolic *** a new direction along the reverse thinking,this study suggests that this nutrient-based metabolism reactivation strategy will inspire broad applications in the treatment of other diseases associated with metabolic disorders,besides tumor.

关键词： melanogenesis metabolism reactivation nanomicelle nutrient delivery tumor nutritional therapy

内存储器的革命——非易失性MRAM技术解析

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电脑 2005年第3期 72-73页

作者： al

尽管内存技术在几十年的发展过程中已经有了很大的变化，而且性能也提高了不少，但是并没有实质性的改变。因为这些产品都是基于动态随机访问存储器DRAM(dynamic random—access memory)的，一旦没有持续的电力，所存储的数据就会立即... 详细信息

尽管内存技术在几十年的发展过程中已经有了很大的变化，而且性能也提高了不少，但是并没有实质性的改变。因为这些产品都是基于动态随机访问存储器DRAM(dynamic random—access memory)的，一旦没有持续的电力，所存储的数据就会立即消失，这就直接导致目前的PC必需经历一段不短的时间进行启动才能正式使用。而无法像其他家电一样即开即用。然而MRAM却是一种全新的技术，甚至有望令PC的应用方式彻底改变。

关键词： MRAM 技术解析非易失性内存储器 access random 发展过程内存技术随机访问实质性 PC 数据

依然很帕杰罗——解读国产PajeroV73 GL

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当代汽车 2007年第1期 94-95页

作者： al

很多中国人对越野车和SUV的认识都是从三菱开始的，确切地说是从帕杰罗（Pajero）开始的。这款征战巴黎-达喀尔拉力赛的名驹从一开始便是如此吸引世人，以致2001年换代的第三代PajeroV73以五十多万元的价格进入国内，却依然受到了极大... 详细信息

很多中国人对越野车和SUV的认识都是从三菱开始的，确切地说是从帕杰罗（Pajero）开始的。这款征战巴黎-达喀尔拉力赛的名驹从一开始便是如此吸引世人，以致2001年换代的第三代PajeroV73以五十多万元的价格进入国内，却依然受到了极大的追捧。2005年，国产帕杰罗终于在长丰猎豹生产线上驶出，并以国产车的身份进入国内市场，但这款富有肌肉感的SUV对于绝大多数人来说，都是一个过于遥远的梦想。尽管三菱号召力巨大，尽管V73是一款好车，接近40万元的价钱将一批三菱的Fans挡在了门外。为了让那些开腻了中级轿车的人能以更小的代价换换口味，长丰三菱推出了帕杰罗V73 GL，售价跌破30万元大关，以29.8万元的价格诱惑着那些早就想换大个子SUV的车主。我们毫不犹豫地预约了经销商，决定对这款“斋版”的帕杰罗V73 GL进行解读。

关键词：帕杰罗国产车 GL 解读巴黎-达喀尔拉力赛 Pajero 国内市场 SUV

沟通万向——对于《大海战II》的跟踪调查报告

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大众软件 2003年第17期 174-177页

作者： al 《大众软件》记者

白蚁肠道共生微生物的作用:酵母,一个“隐身”的特别菌群（英文）

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微生物学报 2018年第6期58卷 1004-1015页

作者： Sameh Samir ali Rania al-Tohamy 孙建中吴建黄淼江苏大学环境与安全工程学院生物质能源研究所江苏镇江212013 坦塔大学科学学院植物学系埃及坦塔31527

长期以来,白蚁对木质纤维素的降解能力令人惊叹,毫无疑问,其在全球碳循环中扮演着一个十分重要的角色。这一强大功能的实现极大地依赖于一种特别的肠道"消化液(digestome)",它的构成不仅包括了来自白蚁自身产生的木质纤维素降解酶系统,... 详细信息

长期以来,白蚁对木质纤维素的降解能力令人惊叹,毫无疑问,其在全球碳循环中扮演着一个十分重要的角色。这一强大功能的实现极大地依赖于一种特别的肠道"消化液(digestome)",它的构成不仅包括了来自白蚁自身产生的木质纤维素降解酶系统,还来源于独特与多样的肠道共生微生物的贡献(包括了古细菌、细菌、酵母以及其他真核生物),它们的协同作用能有效地将木质纤维素生物质高效转化为乙酸、甲烷、二氧化碳、氢气等物质。然而,到目前为止,我们对这类昆虫的独特肠道生物转化系统的认识还很不深入,特别是针对肠道内的那些各类共生微生物菌群的功能、白蚁与共生微生物间的相互关系、以及潜在的科学与应用价值还无法给予明确的科学解释,更不用说针对其肠道中的共生酵母菌群,一类通常被忽略的独特微生物。近20多年来,越来越多的研究证据表明,白蚁肠道共生酵母在与寄主的关系中表现了不可或缺的重要性与独特功能,已被证明广泛分布于不同白蚁及许多其他昆虫的肠道中。随着近20年来越来越多昆虫肠道共生微生物酵母群被发现和鉴定,他们潜在的功能以及与寄主的共生机制被逐步解析,这些研究结果进一步揭示了"隐身"的昆虫肠道酵母类微生物菌群与寄主的营养、关键生物质转化过程中的重要酶系统、转化过程中的关键中间产物的转化与利用、抵御外源性的重要病原物,甚至对白蚁种群繁衍的远缘交配等方面均可能发挥了重要和不可缺少的作用。本文将试图归纳相关研究的最新进展,系统总结与解析白蚁肠道来源共生酵母的重要科学价值及其在不同领域的潜在应用前景。

关键词：白蚁真菌酵母共生木质纤维素生物技术

Factors affecting outcomes of surgically treated patients with cranial extradural hematoma: A cross-sectional study

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Journal of Acute Disease 2020年第3期9卷 105-108页

作者： Ghazwan A.Lafta ali A.Dolachee alyaa K.al-Zubaidi Department of Surgery Faculty of Medicine University of Al-Ameed Iraq Department of Surgery College of Medicine University of Al-Qadisiyah Iraq Ministry of Health Baghdad Iraq

Objective: To evaluate the factors resulting in the poor outcomes in patients with extradural hematoma (EDH).Methods: The study was conducted at the Neurosurgery Teaching Hospital in Baghdad with a group of 100 surgically treated EDH patients and was carried prospectively from February 1st, 2015 to May 1st, 2017. The baseline information (gender, age, cause of injury, time interval between injury and reception, Glasgow coma scale, etc.) of the patients was recorded, and the variables affecting the outcomes were analyzed. Results: In the study, 80% of patients were male;54% were between 10-29 years old;the commonest cause of injury was fall accounting for 51%;78% of the patients got good functional recovery, and 10% had a residual disability;12% died. Better functional recovery was found among patients with a shorter time interval (≤3 h) (P=0.001), while the longer time interval (>3 h) increased the residual disability (P=0.005). In addition, functional recovery increased six times with higher Glasgow coma scale (P=0.001), and inversely related to mortality (P=0.005). Conclusions: Age between 10 and 29 years, male gender, and depth of hematoma more than 5 cm are at higher risks of poor outcomes of patients with surgically treated EDH. Neurological conditions on admission and time interval between injury and reception are also important factors.

关键词： Extradural hematoma Glasgow coma scale Head injury Outcome

Role ot Specific Antibody in Interaction of Leptospires with Human Monocytes and Monocyte-derived Macrophages

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四川医学院学报 1985年第4期 361-362页

作者： Wang Boyao,et al.Research Unit of Leptospirosis,Sichuan Medical College

It has previously been shown that human neu-trophils ingest and kill nonpathogenic Leptospi-ra biflexa in the absence of serum but that pa-thegenic Leptospira interrogans is not ingested byneutrophils even in the presence of normal se-rum. (wang et al:Infect Immun. 44:459-464,1984. )we extended this study by examining the inter-actions of human monocytes and monocyte-derived

关键词： Role ot Specific Antibody in Interaction of Leptospires with Human Monocytes and Monocyte-derived Macrophages