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2011年

作者： Scott Gleason demoz gebre-egziabher 杨东凯

Scott Gleason和demoz gebre-egziabher主编的《GNSS应用与方法(附光盘)》系统介绍GNSS(全球导航卫星系统)的应用及其方法，全书共17章：第1～5章讲述GNSS导航的基础知识，如GNSS信号捕获和跟踪，GNSS位置、速度和时间（PVT）估计，差分... 详细信息

ISBN: (数字)9787121145827

ISBN: (纸本)9787121145827

Scott Gleason和demoz gebre-egziabher主编的《GNSS应用与方法(附光盘)》系统介绍GNSS(全球导航卫星系统)的应用及其方法，全书共17章：第1～5章讲述GNSS导航的基础知识，如GNSS信号捕获和跟踪，GNSS位置、速度和时间（PVT）估计，差分GPS技术和算法等，其中包括位置和速度应用的GNSS测量模拟器演示以及一个完整的GPS软件接收机实现；第6～16章深入阐述GNSS与其他导航系统（如惯性导航器、LADAR、各种射频测量、罗兰系统等）的组合，以及GNSS在航空航天、室内和弱信号导航、掩星、大地测量、环境遥感等领域的应用；第17章是针对GPS开发的新导航信号和未来系统的概述。《GNSS应用与方法(附光盘)》由本领域的知名专家学者撰写，内容丰富，体系完整，各章均包含实际应用案例，并在随书附带的DVD光盘中提供了相应的程序代码，便于读者亲自动手操作和练习。本书可供从事GNSS研究和开发的专业人员以及通信、导航及相关专业的高校师生。

关键词：卫星导航 Wei Xing Dao Hang 全球定位系统

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GNSS applications and methods

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1000年

作者： Scott Gleason demoz gebre-egziabher editors.

Includes bibliographical references and index.

ISBN: (纸本)1596933291;9781596933293

Includes bibliographical references and index.

关键词： Global Positioning System. Artificial satellites in navigation.

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GC-MS Analysis of the Essential Oil and Methanol Extract of the Seeds of Steganotaenia araliacea Hochst

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American Journal of Plant Sciences 2014年第26期5卷 3752-3760页

作者： Mussie Sium demoz Kareru Patrick Gachoki Keriko Joseph Mungai Berhane Girmay Negusse Department of Chemistry Jomo Kenyatta University of Agriculture and Technology Nairobi Kenya Department of Chemistry College of Health Sciences Asmara Eritrea

Background: Steganotaenia araliacea is a multipurpose plant and has wider applications in the folklore for the treatment of various ailments. Previously the presence of antileukemic lignan lactones and saponins was detected in the stem bark, root and leaf of Steganotaenia araliacea. Besides, the diuretic and antibacterial activities of the plant were reported. However, there has been no attempt to examine the constituents of the seeds of Steganotaenia araliacea. This paper reports the first such study of both the essential oil and methanol extract of the seeds of the plant. Methods: The seeds of the plant were shade dried, pounded and thus extracted using methanol. Besides, the essential oil of the seeds was collected using steam distillation. The components of the methanol extract were studied both by GC-MS and preliminary phytochemical studies;the essential oil was running on GC-MS for analysis. Results: The GC-MS analysis of the essential oil of the seeds identified the presence of α-linalool, α-pinene, m-cresol, p-menth-1-en-4-ol, p-menth-1-en-8-ol, myristicin and others. Besides, the methanol extract of the seeds showed the presence of falcarinol, apiol, scoparone, stigmasterol, myristicin etc. The preliminary phytochemical analysis of the methanol extract of the seeds confirms the presence of alkaloids, flavonoids, tannins, coumarines, steroids, and phenols. Conclusion: This plant contains bioactive metabolites and thus can be used as an alternative and complementary medicine in treatment of different ailments. However, further studies on the bioactivity and toxicity of the plant should be done.

关键词： GC-MS Steganotaenia araliacea Essential Oil Phytochemicals

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Evaluation of the Anti-Diabetic Potential of the Methanol Extracts of <i>Aloe camperi</i>, <i>Meriandra dianthera</i>and a Polyherb

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Journal of Diabetes Mellitus 2015年第4期5卷 267-276页

作者： Mussie Sium demoz Kareru Patrick Gachoki Keriko Joseph Mungai Berhane Girmay Negusse Department of Chemistry College of Science Eritrea Institute of Technology Maekel Eritrea Department of Chemistry Jomo Kenyatta University of Agriculture and Technology Nairobi Kenya Department of Chemistry School of Pharmacy College of Health Sciences Asmara Eritrea

The objective of the study was to evaluate the anti-diabetic activities of methanol extracts of Aloe camperi (AC), Meriandra dianthera (MD) and a polyherbal drug (PH) in diabetes induced Wistar albino rats. A single dose of alloxan monohydrate (150 mg/kg, i.p.) was used to induce diabetes mellitus (DM). Diabetes was confirmed by the elevated blood glucose levels determined after 72 h of induction. Animals with mean fasting blood glucose (FBG) level more than 200 mg/dl were recruited for the experiment. The herbal extracts at doses of 200 and 400 mg/kg and standard drugmetformin (5 mg/kg) were administered orally to the diabetic rats for 21 days and the FBG level was estimated on 0, 7, 14 and 21 days. The herbal extracts showed dose-dependent fall in FBG levels and the result exhibited very significant (P < 0.001) decreases in FBG level by the end of the experimental day as compared to the diabetic control. The highest antihyperglycemic effect was observed by MD extract at 400 mg/kg and was comparable to the standard drug. Oral glucose tolerance test (OGTT) was also conducted on normal rats and thus glucose at 2 g/kg per body weight was loaded via oral gavage to all groups 30 min after extract administration. All the groups showed significant increase (P P The hyperglycemia with glucose challenge was significantly brought down (P < 0.001) by all herbal extracts at 60 and 120 min relative to the negative control. Moreover, acute oral toxicity tests was conducted based on the protocols of OECD-425 and thus the LD50 of the herbal extracts was estimated to be greater than 2000 mg/kg. Statistical analysis was performed using One-Way ANOVA followed by Dunnett’s test for multiple comparisons, and values of P < 0.05 were considered as statistically significant.

关键词： Antihyperglycemia Fasting Blood Glucose Level Aloe camperi Meriandra dianthera Polyherb

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