scholarly journals Vitamin C and aroma composition of fresh leaves from Kalanchoe pinnata and Kalanchoe daigremontiana

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Renata Zawirska-Wojtasiak ◽  
Beata Jankowska ◽  
Paulina Piechowska ◽  
Sylwia Mildner-Szkudlarz
Keyword(s):  
Vitamin C ◽  
Folk Medicine ◽  
Point Of View ◽  
Dominant Component ◽  
Juice Extraction ◽  
Kalanchoe Pinnata ◽  
Main Components ◽  
Aroma Components ◽  
Kalanchoë Daigremontiana ◽  
Kalanchoe Daigremontiana

AbstractSpecies of kalanchoe are rich in bioactive compounds and are widely used in folk medicine; however, these plants are not well known from the point of view of aroma. Two species, Kalanchoe pinnata and Kalanchoe daigremontiana, were examined after six months and two years of growth and their vitamin C content, succulence, and aroma composition were determined. The efficiency of juice extraction was highest (72%) for the leaves of K. daigremontiana after six months of growth. The concentration of vitamin C was highest in juices from two-year-old plants and much higher in the juice of K. pinnata (81 mg/100 g). SPME/GC/MS analysis identified 32 aroma components, considering those with the spectrum similarity over 75%. The main components were furan-2-ethyl, hexanal, 2-hexenal, 2,4-hexadienal, 1-octen-3-ol, nonanal. The quantitative relations of these compounds were somewhat different in the two species. The most dominant component, 2-hexenal, is responsible for the green-like aroma noted by the sensory panel.

Badania nad aktywnością biologiczną soku z liści Kalanchoe daigremontiana

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Justyna Chanaj-Kaczmarek ◽  
Magdalena Ulikowska ◽  
Marlena Dudek-Makuch
Keyword(s):  
Skin Diseases ◽  
Folk Medicine ◽  
Antioxidant Properties ◽  
Total Phenolic ◽  
Flavonoid Content ◽  
Commercial Preparation ◽  
Spectrophotometric Methods ◽  
Anti Inflammatory ◽  
Kalanchoë Daigremontiana ◽  
Kalanchoe Daigremontiana

Introduction. Mother of thousands (Kalanchoe daigremontiana) in folk medicine is applied in the form of compresses fresh, crushed leaf, or juice of the leaves of inflammation of the skin, burns and wound healing. Aim. The aim of the study was to compare the anti-inflammatory and antioxidant properties of juices obtained from the leaves of K. daigremontiana, as well as to determine the content of the polyphenols and flavonoids. Material and methods. Compared the anti-hyaluronidase activity and antioxidant potential (DPPH and FRAP) of juices from K. daigremontiana using a spectrophotometric methods. Moreover, total phenolic content and total flavonoid content were determined by spectrophotometric methods, with the Folin-Ciocalteu reagent (FC) and AlCl3 reagent respectively. Results. The obtained results indicate that the juice prepared from the leaves is characterized by a higher content of active compounds and shows a higher anti-inflammatory and antioxidant activity than the commercial preparation. Conclusions. Juices from K. daigremontiana could be helpful in the treatment of skin diseases.

scholarly journals Evaluation of the Leaf Extracts of Kalanchoe pinnata and Kalanchoe daigremontiana Chemistry, Antioxidant and Anti-inflammatory Activity

2021 ◽  
pp. 45-54
Author(s):  
Edmond J. Quintero ◽  
Estela Guerrero De León ◽  
Juan Morán-Pinzón ◽  
Aldahir Mero ◽  
Edwin León ◽  
...  
Keyword(s):  
Radical Scavenging ◽  
Inhibitory Effect ◽  
Model Systems ◽  
Inflammatory Activity ◽  
Nitric Oxide Radical ◽  
Kalanchoe Pinnata ◽  
Anti Inflammatory ◽  
Kalanchoë Daigremontiana ◽  
Radical Scavenging Assay ◽  
Kalanchoe Daigremontiana

The aim of this study was to analyze the chemical components and evaluate the biological activity of the extracts from the leaves Kalanchoe pinnata and Kalanchoe daigremontiana, which are cultivated in the province of Chiriqui, Republic of Panama. Phytochemicals components, antioxidant and anti-inflammatory activities were studied. The composition of the obtained petroleum ether, ethanol and aqueous extracts was analyzed by phytochemical screening. The antioxidant activity of the extracts was studied using three in vitro model systems (DPPH radical scavenging assay, nitric oxide radical scavenging assay, and superoxide radical scavenging activity). The anti-inflammatory activity of these species was studied using an in vivo model (ʎ-carrageenan-induced paw edema in rats). Phytochemical analysis of the extracts showed the presence of alkaloids, steroids, triterpenes, flavonoids, phenolic compounds, saponins and glycosides. The greatest radical inhibitory effect was observed in the DPPH model where the ethanolic extracts of both species developed a concentration-dependent inhibitory effect, the K. pinnata extract reached a maximum inhibitory effect of 49.5 ± 5.6% (2000

Isolation and HPLC Determination of the Chemical Components of Gentianella acuta (Michx.) Hulten

2018 ◽  
Vol 15 (1) ◽  
pp. 21-33
Author(s):  
Ying Wei ◽  
Yongqiao Liu ◽  
Yifan Hele ◽  
Weiwei Sun ◽  
Yang Wang ◽  
...  
Keyword(s):  
Medicinal Plant ◽  
High Speed ◽  
Chemical Constituents ◽  
Folk Medicine ◽  
Gradient Elution ◽  
Chemical Components ◽  
Isolation And Characterization ◽  
Major Chemical ◽  
Main Components ◽  
First Time

Background: Gentianella acuta (Michx.) Hulten is an important type of medicinal plant found in several Chinese provinces. It has been widely used in folk medicine to treat various illnesses. However, there is not enough detailed information about the chemical constituents of this plant or methods for their content determination. Objective: The focus of this work is the isolation and characterization of the major chemical constituents of Gentianella acuta, and developing an analytical method for their determination. Methods: The components of Gentianella acuta were isolated using (1) ethanol extraction and adsorption on macroporous resin. (2) and ethyl acetate extraction and high speed countercurrent chromatography. A HPLC-DAD method was developed using a C18 column and water-acetonitrile as the mobile phase. Based on compound polarities, both isocratic and gradient elution methods were developed. Results: A total of 29 compounds were isolated from this plant, of which 17 compounds were isolated from this genus for the first time. The main components in this plant were found to be xanthones. The HPLC-DAD method was developed and validated for their determination, and found to show good sensitivity and reliability. Conclusion: The results of this work add to the limited body of work available on this important medicinal plant. The findings will be useful for further investigation and development of Gentianella acuta for its valuable medicinal properties.

scholarly journals Foeniculum vulgare Essential Oils: Chemical Composition, Antioxidant and Antimicrobial Activities

2010 ◽  
Vol 5 (2) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Maria Graça Miguel ◽  
Cláudia Cruz ◽  
Leonor Faleiro ◽  
Mariana T. F. Simões ◽  
Ana Cristina Figueiredo ◽  
...  
Keyword(s):  
Essential Oils ◽  
Radical Scavenging ◽  
Antimicrobial Activities ◽  
Point Of View ◽  
Diffusion Method ◽  
Foeniculum Vulgare ◽  
Aerial Parts ◽  
Scavenging Capacity ◽  
Dpph Method ◽  
Main Components

The essential oils from Foeniculum vulgare commercial aerial parts and fruits were isolated by hydrodistillation, with different distillation times (30 min, 1 h, 2 h and 3 h), and analyzed by GC and GC-MS. The antioxidant ability was estimated using four distinct methods. Antibacterial activity was determined by the agar diffusion method. Remarkable differences, and worrying from the quality and safety point of view, were detected in the essential oils. trans-Anethole (31-36%), α-pinene (14-20%) and limonene (11-13%) were the main components of the essentials oil isolated from F. vulgare dried aerial parts, whereas methyl chavicol (= estragole) (79-88%) was dominant in the fruit oils. With the DPPH method the plant oils showed better antioxidant activity than the fruits oils. With the TBARS method and at higher concentrations, fennel essential oils showed a pro-oxidant activity. None of the oils showed a hydroxyl radical scavenging capacity >50%, but they showed an ability to inhibit 5-lipoxygenase. The essential oils showed a very low antimicrobial activity. In general, the essential oils isolated during 2 h were as effective, from the biological activity point of view, as those isolated during 3 h.

Creativity from perspective of axiology

2021 ◽  
Vol 92 (2) ◽  
pp. 10-20
Author(s):  
A. V Kiriakova ◽  
◽  
V.V. Moroz ◽  
Keyword(s):  
Evolutionary Process ◽  
Value Orientations ◽  
Point Of View ◽  
Modern World ◽  
Collective Creativity ◽  
The Social ◽  
Wide Range ◽  
Interdisciplinary Knowledge ◽  
Main Components ◽  
The Individual

Interest in creativity as a subject of research has been growing exponentially since the second half of the 20th century in all areas of human history. A wide range of both domestic and foreign studies allows authors to assert that creativity is a personality trait, inherent to one degree or another. Whereas the development of such trait becomes an urgent necessity in the new reality. The entire evolutionary process of the social development illustrates its dependence on personal and collective creativity. The aim of this research is to study the phenomenon of creativity through the perspective of axiology, i.e. the science of values. Axiology allows us to consider the realities of the modern world from the perspective of not only external factors, circumstances and situations, but also of deep value foundations. Creativity has been studied quite deeply from the point of view of psychology: the special characteristics of a creative person, stages of the creative process, the relationship between creative and critical thinking, creativity and intelligence. Some psychologists emphasize motivation, creative skills, interdisciplinary knowledge, and the creative environment as the main components that contribute to the development of creativity. The authors of the article argue that values and value orientations towards cognition, creativity, self-realization and self-expression are the drivers of creativity. In a broad sense, values as a matrix of culture determine the attitude of society to creativity, to the development of creativity of the individual and the creative class, and to how economically successful a given society will be. Since innovation and entrepreneurship are embodied creativity. Thus, the study of creativity from the perspective of axiology combines the need for a deep study of this phenomenon and the subjective significance of creativity in the context of new realities

scholarly journals ACTIVITY APPROACH AS A PRACTICE-ORIENTED BASIS FOR THE FORMATION OF PROFESSIONAL QUALITIES OF CADETS OF AVIATION NAVIGATORS

2021 ◽  
pp. 126-136
Author(s):  
S.A. Seliverstov ◽  
Keyword(s):  
Educational Process ◽  
Point Of View ◽  
Flight Training ◽  
Professional Activity ◽  
Military Aviation ◽  
Flight Instructors ◽  
Personal Qualities ◽  
Main Components ◽  
The Relationship ◽  
Goals And Objectives

The article discusses the issue of the formation of professionally important qualities (PIQ) in future military aviation navigators in the educational environment of a military university. The goal is to substantiate the activity approach as a practice-oriented basis for the formation of professional qualities in cadets-navigators. A review and analysis of scientific research, publications is carried out, allowing to discover the significance of the activity approach as a methodological direction of research. The methodological basis of the research is the provisions of the activity approach, which are used as the basis for the development and formation of the PIQ among cadets-navigators in the process of a practice-oriented educational process. The description of the results is associated with the characteristics of the content and organization of the professional activity of cadets-navigators in the process of implementation of industrial practice in the form of flight training. Using the activity approach, the main components of the activities of flight instructors, teachers and cadets-navigators are considered, from a unified methodological point of view, and thus the nature of their interaction is revealed. Emphasis have been determined that need to be paid attention to in the course of pedagogical activity on the formation of professional qualities among cadets-navigators. A definition is given and pedagogical technologies are proposed for the formation of professional experience and professional qualities in a future specialist in the context of a practice-oriented pedagogical process. The relationship between the experience gained by the trainee in the practice-oriented pedagogical process and the formation of professionally important personality traits of a specialist is considered. The main goals and objectives for the formation of the necessary professional qualities of cadetsnavigators during flight training have been determined. At the entrance of each stage of flight training, technologies are determined aimed at rational and purposeful impact on the student in order to develop competencies and personal qualities. Recommendations are offered to teachers and instructors to improve the efficiency of development and formation among cadets-navigators of the PIQ.

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