scholarly journals Seasonal variations of natural products in European herbs

Author(s):  
Yan Li ◽  
Christian Zidorn

AbstractThe present review gives an overview about the status of research on seasonal variation of natural products in herbs growing in or grown in Europe. Due to pronounced differences in weather patterns, papers covering plants from the Mediterranean, the temperate, and the cold climate zones are reviewed separately. Apart from trying to give an overview of the existing newer literature after the year 2000, we try to identify some repeatedly found seasonal trends and discuss some possible explanations for these trends. Moreover, some suggestions, which encompass both research bias and desirable quality standards concerning experimental designs for future studies, are given. The covered investigations are mainly focused on aerial parts and leaves. Some publications are also dealing with flowers and roots. The composition of essential oils of aromatic plants are particularly well investigated. Phenolics are the most often studied compound class, including different types of phenolic acids, flavonoids, and tannins. Additionally, some papers assess the seasonal variation of alkaloids and lipophilic compounds.

2010 ◽  
Vol 24 (5) ◽  
pp. 407-415 ◽  
Author(s):  
Nighat Sultana ◽  
Musarrat Akhter ◽  
Zakia Khatoon

2018 ◽  
Vol 12 (3) ◽  
pp. 56 ◽  
Author(s):  
Hussam N. Fakhouri ◽  
Saleh H. Al-Sharaeh

Recent year’s witnessed a huge revolution for developing an automated diagnosis for different disease such as cancer using medical image processing. Many researches have been dedicated to achieve this goal. Analyzing medical microscopic histology images provide us with large information about the status of patient and the progress of diseases, help to determine if the tissue have any pathological changes. Automation of the diagnosis of these images will lead to better, faster and enhanced diagnosis for different hematological and histological tissue images such as cancer. This paper propose an automated methodology for analyzing cancer histology and hematology microscopic images to detect leukemia using image processing by combining two diagnosis procedures initial and advance; the initial diagnosis depend on the percentage of the white blood cells in microscopic images affected by leukemia as indicator for the existence of leukemia in the blood smear sample. Whereas, the advance diagnosis classifying the leukemia according into different types using feature bag classifier. The experimental results showed that the proposed methodology initial diagnosis is able to detect leukemia images and differentiate it from samples that do not have leukemia. While, advance diagnosis it is able to detect and classify most leukemia types and differentiate between acute and chronic, but in some cases in the chronic leukemia where the percent of blast cells and shape are similar; it gave a diagnosis of the type of leukemia to the most similar type.


2021 ◽  
Vol 8 (3) ◽  
pp. 1285-1298
Author(s):  
Diana Anggraeni ◽  
Herland Franley Manalu ◽  
Desty Anggraini

Humans have gone through many incidents, both good and bad experiences, and sometimes these experiences are shared with others in the form of stories. The stories, as one of the forms of literary works, would be nothing without the created characters within them because they provide the viewers with a purpose and a reason for us to learn about what happens in the story. Besides, they act as one important element in the movie with various psychological effects. This research aims to analyze the characteristics and the hierarchy of human needs, especially esteem needs, that appear in the main character named Will Traynor in the ‘Me Before You’ movie directed by Thea Sharrock. This study uses descriptive data analysis which describes a phenomenon and the main character in the movie. The results revealed seven characters comprising the esteem needs hierarchy: sensitive, open-minded, friendly, kind, confident, humble, and stubborn. The esteem needs hierarchy is the desire to have the need to be approved, valued, and recognized to have some self-esteem. This is striking in the movie because of the status of the character, Will Traynor as a lord, and Louisa Clark who is only a maid and has no superiority over Will in her life. The findings imply the personality of humans differ in their characters and psychology as shown from the esteem needs hierarchy in Will’s personality expressing the different types of characteristics.


Author(s):  
Fidelia Johny ◽  
Noorasmah Saupi ◽  
Shiamala Devi Ramaiya

Pepper (Piper nigrum L.) is one of the most important cash crops in Sarawak. The productivity of pepper is consistently low due to the low yield of berry production. One of the major problems of pepper production is inconsistent flowering time. This is due to the morphology and inheritance of functional male, female and hermaphrodite (bisexual) flower in P. nigrum which affect the productivity of pepper. For the exploitation of pepper for its maximum production, the detailed of flower development and flower composition are important factors to be considered. A field survey was conducted to determine the status of farming practices and problems encountered by the farmers. The study was also done to determine the composition of flower which influenced the consistency of berry production in P. nigrum in Sarawak. Surveys were conducted at 18 pepper farms in Sarawak to determine the composition of flowers in different types of Sarawak pepper varieties which are Kuching, Semenggok Aman and Semenggok Emas. Nine spikes were harvested in each pepper vine. Three pepper vines were selected randomly for each variety. The spikes were then observed under 3D Keyence microscope to determine the number of flowers of each type of flower. The survey on the farming practices were also conducted. The composition of flower was found to be varied between varieties. ‘Kuching’ variety had less hermaphrodite flower when compared to ‘Semenggok Aman’ and ‘Semenggok Emas’ varieties. In addition, a proportion of 29% farmers had encountered root rot disease problem in their farm, while 21% stated that unsynchronisation of berries production in each harvesting time as a major problem.


Author(s):  
Iuliia Zelena

The article is devoted to the study of marked and unmarked attributive constructions, considering the influence of semantic transfer mechanisms, taking into account their productive potential. Structuraland semantic characterization of types of attributive constructions is performed in light of two initial theories –in view ofreferentstatusand actual sentence fragmentation. An independent research of relationsbetween predication manifestations and the semanticand syntactic structure of a sentence has been performed by determining the valence properties of attributive verbs. The distinctionbetween different types of constructionswith the attribute complement isdescribed and it is specifiedthat there is a direct correlation between the type of attributive sentences and the emergence of predicative relation.The article is dedicated to the analysis of modification of the information structure and the status of the referent in sentences containing attributive object. Given the types of interpretation of attributive sentences and, based on the results of contextual analysis, it became possible to prove that change of argumentative structure in verbal group gives a reason to treat attributive verb with elements SN2 and X as a predicative focus of the sentence and permit to consider it as the complex secondary predicate.


Dialogue ◽  
2006 ◽  
Vol 45 (3) ◽  
pp. 505-528 ◽  
Author(s):  
David M. Godden

ABSTRACTThis article argues that Quine's holistic and naturalized semantics provides an inadequate account of the foundations of logical expressions and misrepresents the internal structure of theories. By considering a Quinean model of theoretical revision, I identify the status and foundation holism provides to the propositions of logic. I contend that a central tenet of Quinean holism—the Revisability Doctrine—cannot be held consistently, and that the inconsistencies surrounding it mark a series of pervasive errors within naturalized holism. In response, I propose that semantic theories must reflect the different linguistic functions of different types of expressions and the specific relationships that individual concepts within a theory or language have to one another.


Author(s):  
Deborah Kamen

This chapter focuses on the status of female citizens because female citizenship is sufficiently different from male citizenship to warrant a distinct status category. That is, female citizens are less equal to male citizens than female slaves are to male slaves, female ex-slaves to male, female metics to male, and so on. It distinguishes between different types of female citizens as appropriate. One of the most distinctive attributes of Athenian women is that although they were citizens, they were also under the supervision of a kurios or guardian. As girls, they were under the guardianship of their fathers, and when they married, they entered the guardianship of their husbands. This much is certain, but the precise degree of control the kurios had over women and girls is less clear.


2008 ◽  
Vol 3 (8) ◽  
pp. 1934578X0800300 ◽  
Author(s):  
Tshering D. Bhutia ◽  
Karin M. Valant-Vetschera

A new accession of Artemisia dracunculus L., originating from Kyrgyzstan, has been analyzed for the first time regarding organ-specific accumulation of lipophilic compounds. Differences were found between leaves, stems, and inflorescences. Exudates obtained from aerial parts yielded only flavanones (eriodictyol, naringenin and their methyl ethers), while the coumarins herniarin and scoparone and biosynthetically unrelated isocoumarins (artemidin, dracumerin) were found to be tissue components. The chemosystematic significance of observed accumulation tendencies is shortly discussed, and other chemodiversity aspects are briefly addressed.


2020 ◽  
Vol 6 (4) ◽  
pp. 488-508
Author(s):  
Antoine Boisson ◽  
Michel Allard

Northwestern Nunavik (Quebec, Canada) is characterized by specific landforms and poorly documented examples of emerging coastal landscapes. In this study, we identified the different types of coasts and examined how they were morphologically reworked and shaped during the Holocene. This coastal region is currently emerging at rates of 8–9 mm/year due to glacial isostatic adjustment. The coastal zone includes a large number of glacial and glaciofluvial landforms such as De Geer moraines, eskers, and drumlinoid ridges that are continuously modified by coastal processes as they emerge. Wave erosion, shore drifting, and sedimentation transform the original landforms into transverse spits, tombolos, dunes, beaches, and narrow tidal flats. Once raised above the reach of storm surges, the coastal landscape evolves into a maze of low tundra ridges, wetlands, and lakes, which represent the end point of rapid shoreline regression. Exposure to a cold climate allows permafrost inception and aggradation in the uplifted sediments, forming features such as ice-wedge polygons and frost boils. Conceptual models of coastal evolution and ecosystem formation are proposed, from the original submarine landscapes to the emerged landscapes.


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