Coffee wilt disease

2022 ◽  
Author(s):  
Julie Flood ◽  
Keyword(s):  
20Th Century ◽  
Management Practices ◽  
Resistance Mechanisms ◽  
Wilt Disease ◽  
Research Trends ◽  
Future Research ◽  
Early 20Th Century ◽  
Robusta Coffee ◽  
Breeding Programmes

In the early 20th century, coffee wilt disease (CWD) caused by the vascular wilt pathogen, Fusarium xylarioides, spread across Africa destroying coffee trees, reducing yields and significantly impacting producer livelihoods. Through systematic sanitation and establishment of breeding programmes in affected countries, CWD appeared to decline. However, the disease re-emerged and increased to epidemic proportions in the 1990s affecting robusta coffee in DRC, Uganda and Tanzania and arabica coffee in Ethiopia. In 1999, 14.5 million robusta coffee trees were estimated to have been destroyed in Uganda alone. This chapter discusses the history, impact, symptoms, cause and spread of CWD. A summary of the Regional Coffee Wilt Programme (RCWP) which examined many aspects of the disease and its management is also provided. . Future research trends include host specificity, underlying resistance mechanisms and the role of alternative hosts. Investigation of pathogen ecology is needed to allow greater focus on agroecological management practices.

ABOUT CUSTOMS BUSINESS IN TURKESTAN IN THE SECOND HALF OF THE 19th -EARLY 20th CENTURY

2020 ◽  
Vol 12 (3) ◽  
pp. 38-47
Author(s):  
Chinpulat Kurbanov ◽  
Keyword(s):  
20Th Century ◽  
Scientific Article ◽  
Early 20Th Century ◽  
The Future ◽  
History Of ◽  
Stage Development

The author in this scientific article examines the stage-by-stage development and formation of customs in Turkestan in the second half of the 19th -early 20th centuries. The author studied the history of customs in Turkestan and its role in establishing a single customs line in the future with neighboring khanates. The author focuses on the role of Russia in the establishment of a single customs line and the development of customs in Turkestan

An international hierarchy of science: conquest, cooperation, and the 1959 Antarctic Treaty System

2021 ◽  
pp. 135406612110338
Author(s):  
Joanne Yao
Keyword(s):  
International Relations ◽  
20Th Century ◽  
International Institutions ◽  
Social Performance ◽  
Early 20Th Century ◽  
Antarctic Treaty ◽  
The Antarctic ◽  
International Status ◽  
Antarctic Treaty System

The Antarctic Treaty System (ATS), created in 1959 to govern the southern continent, is often lauded as an illustration of science’s potential to inspire peaceful and rational International Relations. This article critically examines this optimistic view of science’s role in international politics by focusing on how science as a global hierarchical structure operated as a gatekeeper to an exclusive Antarctic club. I argue that in the early 20th century, the conduct of science in Antarctica was entwined with global and imperial hierarchies. As what Mattern and Zarakol call a broad hierarchy, science worked both as a civilized marker of international status as well as a social performance that legitimated actors’ imperial interests in Antarctica. The 1959 ATS relied on science as an existing broad hierarchy to enable competing states to achieve a functional bargain and ‘freeze’ sovereignty claims, whilst at the same time institutionalizing and reinforcing the legitimacy of science in maintaining international inequalities. In making this argument, I stress the role of formal international institutions in bridging our analysis of broad and functional hierarchies while also highlighting the importance of scientific hierarchies in constituting the current international order.

Generations on paper: Bourdieu and the critique of ‘generationalism’

2015 ◽  
Vol 55 (1) ◽  
pp. 94-114 ◽  
Author(s):  
Semi Purhonen
Keyword(s):  
20Th Century ◽  
Political Mobilization ◽  
Early 20Th Century ◽  
Sociological Study ◽  
Karl Mannheim ◽  
Word Generation ◽  
Potential Source

This article first examines the role of the concept of generation in Pierre Bourdieu’s work. It shows that Bourdieu’s usage of the concept of generation varied throughout his œuvre and that Bourdieu seldom if ever used the concept in the same sense as Karl Mannheim and many subsequent sociologists who have understood generation as a potential source of identity and political mobilization. However, and second, the article argues that Bourdieu’s sociology does have much to offer for the sociological study of generations, but only if we stop concentrating on those rare passages in which he explicitly used the word ‘generation’. We should focus instead on his more general approach to the genesis of social groupings, classification struggles and the difficult relationships of representation. The application and extension of Bourdieu’s ideas demonstrated here can provide a welcome antidote to so-called generationalism – a simplified and exaggerated picture of generations, which dates back to early 20th-century European intellectuals and which can still be found in today’s popular discourses as well as in academic studies.

The Ismaili Tradition in Iran: 13th Century to the Present

2021 ◽  
Author(s):  
Daniel Beben
Keyword(s):  
20Th Century ◽  
Future Research ◽  
Early 20Th Century ◽  
13Th Century ◽  
Complete Understanding ◽  
Northern Iran ◽  
Minority Community ◽  
History Of ◽  
The 19Th Century ◽  
To Receive

The Ismailis are a minority community of Shiʿi Muslims that first emerged in the 8th century. Iran has hosted one of the largest Ismaili communities since the earliest years of the movement and from 1095 to 1841 it served as the home of the Nizārī Ismaili imams. In 1256 the Ismaili headquarters at the fortress of Alamūt in northern Iran was captured by the Mongols and the Imam Rukn al-Dīn Khūrshāh was arrested and executed, opening a perilous new chapter in the history of the Ismailis in Iran. Generations of observers believed that the Ismailis had perished entirely in the course of the Mongol conquests. Beginning in the 19th century, research on the Ismailis began to slowly reveal the myriad ways in which they survived and even flourished in Iran and elsewhere into the post-Mongol era. However, scholarship on the Iranian Ismailis down to the early 20th century remained almost entirely dependent on non-Ismaili sources that were generally quite hostile toward their subject. The discovery of many previously unknown Ismaili texts beginning in the early 20th century offered prospects for a richer and more complete understanding of the tradition’s historical development. Yet despite this, the Ismaili tradition in the post-Mongol era continues to receive only a fraction of the scholarly attention given to earlier periods, and a number of sources produced by Ismaili communities in this period remain unexplored, offering valuable opportunities for future research.

scholarly journals Regulatory Role of N6-methyladenosine (m6A) Modification in Osteosarcoma

2021 ◽  
Vol 11 ◽  
Author(s):  
Yujie Zhang ◽  
Yanyan Wang ◽  
Liwei Ying ◽  
Sifeng Tao ◽  
Mingmin Shi ◽  
...  
Keyword(s):  
Molecular Mechanism ◽  
Research Trends ◽  
Rna Modification ◽  
Future Research ◽  
Related Factors ◽  
The Past ◽  
Pathophysiological Role ◽  
Primary Bone ◽  
Non Coding Rnas

Osteosarcoma is the most common primary bone malignancy, typically occurring in childhood or adolescence. Unfortunately, the clinical outcomes of patients with osteosarcoma are usually poor because of the aggressive nature of this disease and few treatment advances in the past four decades. N6-methyladenosine (m6A) is one of the most extensive forms of RNA modification in eukaryotes found both in coding and non-coding RNAs. Accumulating evidence suggests that m6A-related factors are dysregulated in multiple osteosarcoma processes. In this review, we highlight m6A modification implicated in osteosarcoma, describing its pathophysiological role and molecular mechanism, as well as future research trends and potential clinical application in osteosarcoma.

Kainar: A Late 18th to Early 20th Century Ritual and Housing Complex in the Northern Ustyurt

2022 ◽  
Vol 49 (4) ◽  
pp. 109-119
Author(s):  
S. E. Azhigali ◽  
L. R. Turganbayeva
Keyword(s):  
20Th Century ◽  
Spatial Organization ◽  
Early 20Th Century ◽  
Way Of Life ◽  
Nomadic Pastoralists ◽  
Permanent Settlement ◽  
History Of ◽  
Stone Carving ◽  
Housing Complex

This is the fi rst description of a key Kazakh recent permanent settlement at Donyztau, in the northern Ustyurt. Such sites, evidencing major historical processes during the transition of nomadic pastoralists to a semi-sedentary lifestyle (mid-19th to early 20th century), are known as “ritual and housing complexes” (RHC). Kainar, a highly representative site, is viewed as a socio-cultural phenomenon and an integral architectural and landscape ensemble. The excavation history of RHCs in the Donyztau area and their evolution are discussed, and the role of ascetics such as Doszhan-Ishan Kashakuly is described. We highlight separate parts of the complex (the settlement and cemetery) and their elements. The architecture of the RHC is reconstructed with regard to structure, function, and continuity with the landscape. The layout of the site as a whole and of the madrasah with its typical elements are compared with those of similar sites in Central Asia and Kazakhstan. A reconstruction of the complex is proposed and the function of public halls is interpreted. The role of the cemetery and of its parts in the structure of the RHC is evaluated; the evolution of its spatial organization is traced. Types of memorial complexes are listed in terms of harmony with the landscape, archaic beliefs, architecture, and style, specifi cally stone carving. The historical and cultural signifi cance of Kainar as a source of knowledge about the transition to a semi-sedentary way of life and the Islamization of the steppe is discussed.

From grand banking hall to the art and design school library of the 21st century

2007 ◽  
Vol 32 (4) ◽  
pp. 11-16 ◽  
Author(s):  
Carol Terry
Keyword(s):  
20Th Century ◽  
Rhode Island ◽  
21St Century ◽  
School Library ◽  
Early 20Th Century ◽  
Construction Process ◽  
Site Specific ◽  
Art And Design ◽  
Building Program

With a detailed but not site-specific building program, the librarians at Rhode Island School of Design made the case for a new library three times the size of the existing facility. The site became specific with the donation of an early 20th-century grand banking hall. This paper addresses the role of the librarian in the design and construction process and includes an analysis of the way the new library meets the program objectives. In the early 1990’s after several early attempts to resolve the library’s space constraint at Rhode Island School of Design, the librarian was given a useful bit of advice: Stop trying to find the space. You must focus first on the program. What is it that you really need?

Sign in / Sign up

Export Citation Format

Share Document