scholarly journals Adverse effects of khat: a review

2003 ◽  
Vol 9 (6) ◽  
pp. 456-463 ◽  
Author(s):  
Glenice Cox ◽  
Hagen Rampes
Keyword(s):  
Adverse Effects ◽  
Red Sea ◽  
Local People ◽  
Eastern Coast ◽  
The West ◽  
Catha Edulis ◽  
Active Constituents ◽  
Khat Chewing ◽  
Plant Grown

Catha edulis (khat) is a plant grown in the countries around the Red Sea and on the eastern coast of Africa. Its leaves are chewed by the local people for their stimulant action. Its principal active constituents are cathinone and cathine, which have sympathomimetic actions. Migration of Africans from these countries has spread the habit of khat chewing to the West. Chewing khat has a number of important psychological and physical sequelae. ‘Khat-related’ psychosis is very similar to that seen following use of amphetamines.

scholarly journals The Ambangulu Forest, West Usambara Mountains, Tanzania: a threatened Eastern Arc forest

Oryx ◽  
1995 ◽  
Vol 29 (3) ◽  
pp. 212-214 ◽  
Author(s):  
Steven M. Goodman ◽  
William T. Stanley ◽  
William D. Newmark ◽  
Kim M. Howell
Keyword(s):  
Natural Forest ◽  
Local People ◽  
Wind Damage ◽  
Fuel Wood ◽  
The West ◽  
Eastern Arc

Ambangulu Forest is one of the few remaining tracts of natural forest between 800 and 1200 m in the West Usambara Mountains of Tanzania. It may be the biologically richest area in the region but it is threatened by illegal felling of timber trees, wind damage, grazing and browsing livestock, and collection of fuel-wood and building poles. A proposed project aims to protect the forest and benefit local people at the same time.

The tompon-tany and the tompon-drano in the History of Central and Western Madagascar

1982 ◽  
Vol 9 ◽  
pp. 61-76
Author(s):  
Finn Fuglestad
Keyword(s):  
Seventeenth Century ◽  
West Coast ◽  
Religious Beliefs ◽  
Eastern Coast ◽  
Recent Past ◽  
The West ◽  
Political Consequences ◽  
The People ◽  
History Of ◽  
Conceptual Revolution

At some undefined time in the fairly recent past central and western Madagascar witnessed a conceptual 'revolution' which had far-reaching political consequences. The religious beliefs and symbols which constituted the main ingredients of this 'revolution'--and probably also the people who propagated them--were in some way connected with the Zafindraminia-Antanosy and the Anteimoro of the southeastern and eastern coast. It is quite clear that these and similar groups had been strongly influenced by Islam and that they practiced what could perhaps be described as a corrupt or diluted Islam or a syncretic 'pagan' Muslim religion. (It is significant that as their name indicates the Zafindraminia claim descent from Raminia who they hold to have been the mother of Muhammad.) One of the main ingredients of this religion was the cult of the ody or guardian amulets, objects usually made of wood which are strikingly reminiscent of the so-called “charms” or “gris-gris” sold by Muslim clerics over much of Africa. Another ingredient is represented by the institution of ombiasy. The ombiasy (the main manufacturers of ody) whom the Frenchman Etienne de Flacourt at Fort-Dauphin in the seventeenth century took to be Muslim clerics were originally the “priests” (or the “devins guérisseurs,” according to Hubert Deschamps) of the Anteimoro and the Zafindraminia-Antanosy. Subsequently this institution was disseminated throughout nearly the whole of Madagascar. Yet another ingredient was the system of divination known as sikidy, which also spread to other parts of Madagascar, including Imerina and the Sakalava country.These beliefs, symbols, and institutions deeply influenced the people of the west coast (the present-day Sakalava country) and of central Madagascar (Imerina and Betsileo country).

scholarly journals Carbon dioxide and methane fluxes at the air–sea interface of Red Sea mangroves

2018 ◽  
Vol 15 (17) ◽  
pp. 5365-5375 ◽  
Author(s):  
Mallory A. Sea ◽  
Neus Garcias-Bonet ◽  
Vincent Saderne ◽  
Carlos M. Duarte
Keyword(s):  
Carbon Dioxide ◽  
Organic Matter ◽  
Red Sea ◽  
Ghg Emissions ◽  
Eastern Coast ◽  
Relative Role ◽  
Emission Rates ◽  
Mangrove Forests ◽  
Ch4 Production

Abstract. Mangrove forests are highly productive tropical and subtropical coastal systems that provide a variety of ecosystem services, including the sequestration of carbon. While mangroves are reported to be the most intense carbon sinks among all forests, they can also support large emissions of greenhouse gases (GHGs), such as carbon dioxide (CO2) and methane (CH4), to the atmosphere. However, data derived from arid mangrove systems like the Red Sea are lacking. Here, we report net emission rates of CO2 and CH4 from mangroves along the eastern coast of the Red Sea and assess the relative role of these two gases in supporting total GHG emissions to the atmosphere. Diel CO2 and CH4 emission rates ranged from −3452 to 7500 µmol CO2 m−2 d−1 and from 0.9 to 13.3 µmol CH4 m−2 d−1 respectively. The rates reported here fall within previously reported ranges for both CO2 and CH4, but maximum CO2 and CH4 flux rates in the Red Sea are 10- to 100-fold below those previously reported for mangroves elsewhere. Based on the isotopic composition of the CO2 and CH4 produced, we identified potential origins of the organic matter that support GHG emissions. In all but one mangrove stand, GHG emissions appear to be supported by organic matter from mixed sources, potentially reducing CO2 fluxes and instead enhancing CH4 production, a finding that highlights the importance of determining the origin of organic matter in GHG emissions. Methane was the main source of CO2 equivalents despite the comparatively low emission rates in most of the sampled mangroves and therefore deserves careful monitoring in this region. By further resolving GHG fluxes in arid mangroves, we will better ascertain the role of these forests in global carbon budgets.

Nutraceuticals for Human Health and Hypersensitivity Reaction

2022 ◽  
pp. 1184-1202
Author(s):  
Anamika Basu ◽  
Anasua Sarkar ◽  
Piyali Basak
Keyword(s):  
Mast Cell ◽  
Molecular Docking ◽  
Immune System ◽  
Side Effects ◽  
Adverse Effects ◽  
Dust Mites ◽  
Active Constituents ◽  
Almost All ◽  
Normal Physiological Function

An allergy is an overreaction of the immune system to a substance called an antigen, e.g., pollen from grasses, dust mites, etc. The drugs used for allergy in allopathy have undesirable side effects. The use of medicinal plants becomes popular due to the adverse effects of allopathic drugs. Nutraceuticals are food playing a significant role in maintaining normal physiological function. Mast cells are immunologically important cells found in almost all parts of our body, and contain histamines, leukotrienes within their granular sacs, along with those of basophils, are responsible for the symptoms of allergy. According to sources mast cell stabilizers can be classified into three categories, e.g., synthetic, semi synthetic and natural. Mast cell stabilising agents from natural resources can be obtained from different group of compounds, e.g., flavonoids, coumarins, phenols, terpenoids, alkaloids. In this book chapter, the active constituents present in them and their mode of action are highlighted using techniques of computational biology, e.g., molecular docking, etc.

Passage Through the Strait of Bab Al-Mandeb

1978 ◽  
Vol 13 (2) ◽  
pp. 180-193
Author(s):  
Ruth Lapidoth
Keyword(s):  
Indian Ocean ◽  
Coral Reefs ◽  
Red Sea ◽  
Democratic Republic ◽  
Gulf Of Aden ◽  
Eastern Shore ◽  
The West ◽  
The Indian Ocean ◽  
The Republic ◽  
Yemen Arab Republic

The strait of Bab al-Mandeb, “the gate of tears” or “the gate of the wailing yard”, joins the high seas of the Gulf of Aden and the Indian Ocean to those of the Red Sea. The name is primarily used by geographers to designate the narrowest part of the passage, between Ras Bab al-Mandeb on the Asian shore and Ras Siyan in Africa. At this point it is bordered on the east by the Yemen Arab Republic (Northern Yemen) and the People's Democratic Republic of Yemen (Southern Yemen), and in the west by the Republic of Djibouti (formerly the French Territory of the Afars and Issas). About 14 miles farther north, where the Red Sea (or, for that matter, the strait) is nearly 20 miles wide, lies the coast of Ethiopia (the province of Eritrea). All the riparians claim a territorial sea of 12 miles, and the Yemen Arab Republic, as well as the People's Democratic Republic of Yemen, also claim jurisdiction for certain purposes in an additional zone of 6 miles.On the eastern shore of the strait of Bab al-Mandeb lies the peninsula of Ras Bab al-Mandeb, which is about 6–10 km. wide. It consists of rocky, volcanic plains with several hills of 200–300 m. The coast of Ras Bab al-Mandeb is surrounded by coral reefs of a width of up to 1500 m. The border between North Yemen and South Yemen passes down the middle of Ras Bab al-Mandeb.

Seismic hazard assessment and rheological implications: a case study selected for cities of Saudi Arabia along the eastern coast of Red Sea

2017 ◽  
Vol 10 (24) ◽  
Author(s):  
Faisal Rehman ◽  
Abdullah M. Alamri ◽  
Sherif M. El-Hady ◽  
Hussein M. Harbi ◽  
Ali H. Atef
Keyword(s):  
Saudi Arabia ◽  
Seismic Hazard ◽  
Red Sea ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
Eastern Coast

scholarly journals Lightning characteristics over the eastern coast of the Mediterranean during different synoptic systems

2015 ◽  
Vol 15 (11) ◽  
pp. 2449-2459 ◽  
Author(s):  
Y. Ben Ami ◽  
O. Altaratz ◽  
Y. Yair ◽  
I. Koren
Keyword(s):  
Red Sea ◽  
Eastern Mediterranean ◽  
Convective Available Potential Energy ◽  
Lightning Activity ◽  
Eastern Coast ◽  
Land Breeze ◽  
Late Winter ◽  
Data Set ◽  
Study Region ◽  
Synoptic System

Abstract. Thunderstorm activity takes place in the eastern Mediterranean mainly through the boreal fall and winter seasons during synoptic systems of Red Sea Trough (RST), Red Sea Trough that closed a low over the sea (RST-CL), and Cyprus Low (during fall – FCL and winter – WCL). In this work we used the Israeli Lightning Location System ground strokes data set, between October 2004 and December 2010, for studying the properties of lightning strokes and their link to the thermodynamic conditions in each synoptic system. It is shown that lightning activity dominates over sea during WCL and FCL systems (with maximum values of 1.5 in WCL, and 2.2 km−2 day−1 in FCL) and have a dominant component over land during the RST and RST-CL days. The stronger instability (high Convective Available Potential Energy (CAPE) values of 762 ± 457 J kg−1) during RST-CL days together with the higher altitude of the clouds' mixed-phase region (3.6 ± 0.3 km), result in a slightly higher density of ground strokes during this system but a lower fraction of positive ground strokes (3 ± 0.5 %). In general the fraction of positive strokes was found to be inversely correlated with the sea surface temperature: it increases from 1.2 % in early fall to 17.7 % in late winter, during FCL and WCL days. This change could be linked to the variation in the charge center's vertical location during those months. The diurnal cycle in the lightning activity was examined for each synoptic system. During WCL conditions, no preferred times were found through the day, as it relates to the random passage timing of the frontal systems over the study region. During the fall systems (FCL and RST-CL) there is a peak in lightning activity during the morning hours, probably related to the enhanced convection driven by the convergence between the eastern land breeze and the western synoptic winds. The distributions of peak currents in FCL and WCL systems also change from fall to winter and include more strong negative and positive strokes toward the end of the winter.

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