PROCEDIMENTOS PARA DETERMINAÇÃO DE DENSIDADE RELATIVA DOS MINERAIS: UMA VIVÊNCIA NOS LABORATÓRIOS DE MINERALOGIA DO MUSEU DE GEOCIÊNCIAS DA UFPA

2021 ◽  
Vol 8 (2021) (1) ◽  
pp. 1-12
Author(s):  
Milson XAVIER ◽  

The role of Mineralogy in society has an extraordinary and unique importance, to the point of verifying its presence both on the wall of the environment where the individual is, in times of pandemic, or on the unoccupied asphalt of the external environment. In the study of Mineralogy, the determination of the relative density of minerals is a constant assignment of professionals in the mineral industry, either for the purpose of identifying mineral substances or for solving storage and transportation issues. Therefore, knowing the equipment and which procedures for determining it are fundamental issues for solving these problems. In this way, descriptions of operational procedures of some equipment are presented, built with the purpose of determining the relative density of minerals, as a way to contribute to undergraduate students in Geology or similar sciences.

Toxins ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 133 ◽  
Author(s):  
Annika Jagels ◽  
Viktoria Lindemann ◽  
Sebastian Ulrich ◽  
Christoph Gottschalk ◽  
Benedikt Cramer ◽  
...  

The genus Stachybotrys produces a broad diversity of secondary metabolites, including macrocyclic trichothecenes, atranones, and phenylspirodrimanes. Although the class of the phenylspirodrimanes is the major one and consists of a multitude of metabolites bearing various structural modifications, few investigations have been carried out. Thus, the presented study deals with the quantitative determination of several secondary metabolites produced by distinct Stachybotrys species for comparison of their metabolite profiles. For that purpose, 15 of the primarily produced secondary metabolites were isolated from fungal cultures and structurally characterized in order to be used as analytical standards for the development of an LC-MS/MS multimethod. The developed method was applied to the analysis of micro-scale extracts from 5 different Stachybotrys strains, which were cultured on different media. In that process, spontaneous dialdehyde/lactone isomerization was observed for some of the isolated secondary metabolites, and novel stachybotrychromenes were quantitatively investigated for the first time. The metabolite profiles of Stachybotrys species are considerably influenced by time of growth and substrate availability, as well as the individual biosynthetic potential of the respective species. Regarding the reported adverse effects associated with Stachybotrys growth in building environments, combinatory effects of the investigated secondary metabolites should be addressed and the role of the phenylspirodrimanes re-evaluated in future research.


Russian vine ◽  
2021 ◽  
Vol 15 ◽  
pp. 19-29
Author(s):  
V. Roychev ◽  
◽  
N.T. Keranova ◽  

The ecological stability of several table seedless hybrid vine forms has been demonstratively studied. It has been found that their dependency on the conditions of the external environment by the individual ampelographic indices, varies, and its spec-ificity can be utilized in the processes of selection and cultivation within a certain micro-region. The applied approach for the determination of their ecological flexibility increases the commercial efficiency of the selection procedures and the differentiation of the agro-technological practices. The existing trend according to which the most adaptive to the external conditions hybrid forms are characterized by lower or the lowest values of the corresponding index, requires further research.


2018 ◽  
Vol 9 (2) ◽  
pp. 250-258
Author(s):  
Aji Cahya Nusantara ◽  
Budhi Haryanto

This study wants to examine the relationship between sex appeal and attitude towards the ads, and more than, this study also wants to examine the role of product factors in moderating the relationship of this two variables. Experimental design is done to control the relation among the variables observed in this study. The participants consist of 100 males’ undergraduate students of Faculty of Economics and Business, Universitas Sebelas Maret, Surakarta-Indonesia, who are divided into 4 groups. Generalized Auto Regression Conditional Hetero-regressive (GARCH) is statistical method chosen to analysis the data. The results showed that sex appeal is an effective stimulus affects the individual positive attitude toward an advertisement. As well as product factor is another stimulus, which effectively influence positive attitudes toward advertising. But in this study also found that the product factor is not moderate the relationship between sex appeal and positive attitude toward advertising. In addition to this study also discusses the implications of both theoretical and practical, as well as the limitations of the study.


Author(s):  
Nikolay V. Shamanin ◽  
Vitaliy Ye. Lapshin

This article addresses the problem of determining the professional self-determination of younger family members. The article provides an analysis of the views of researchers on the role of the family in the professional development of an individual. The article deals with the problems of professional self-determination in dynastic and non-dynastic families. The question arises, whether the family is a support for its younger members on the basis of which, successful formation of professional qualities of the individual takes place, or the family may produce a "lag effect", ignoring inclinations, flairs and interests of the child. The study allows the authors to conclude that there is a transgenerative transference in the professional self-determination of the individual. The authors suggest that transgenerative transference is the main determining factor of professional self-determination in dynastic families, determining the choice of a profession by younger members of a dynastic family. It has been suggested that transformational phenomena occur in the process of professional self-determination of younger family members according to the types "inversion" (inversion), "hypertrophy" (amplification) and "deformation (distortion)".


Author(s):  
Natalia Zavatska ◽  
Alina Bilianska ◽  
Lilia Ryndina ◽  
Valentina Shona

The article considers the features of socialization and individual expectations of the individual as components of its spheres of life. It is shown that the peculiarities of the subject's self-attitude determine the attitudes to life. Transforming, creative activity is one pole. The opposite pole - passivity, expectations, dependence. The result of psychological "tightness" is a feeling of failure. To solve the corrective tasks of forming an active life position, it is important that this transformative, corrective process begins with the analysis and work with self-assessment judgments. Individuals who have, in general, a fairly positive experience of social adaptation and self-realization will tend to form positive, flexible, realistic and concrete expectations. At the same time, individuals who have experienced numerous disappointments and conflicts in the past will be more likely to have negative, rigid, unrealistic and diffuse expectations in their respective fields of activity. Accordingly, the selected indicators are expressed in the features of the expectations of the individual in such areas as significant interpersonal relationships, ideas about their own potential and prediction of the future. The role of individual expectations (as components of cognitive development), as well as their relationship with the process of self-determination of the individual, which provides an opportunity to develop new, more effective programs of socio-psychological adaptation of the younger generation. Key words: specialty, socialization, examination, life.


2021 ◽  
pp. 003452372198938
Author(s):  
Saurabh Maheshwari ◽  
Purnima Singh

Previous research has demonstrated a strong relationship between access to capital and academic achievement. The present study explores the mediating role of the individual mindset and class perception in the capital–achievement relation. A survey-based study is conducted on 314 Delhi based undergraduate students. Different measures/proxies of various forms of capital and achievement are used. To see the role of the individual mindset, psychological resources of individual are considered and operationalized in terms of self-motivation and self-confidence. Results show that economic, social, and cultural capital have a significant influence on academic achievement. However, class perception and involvement in highbrow activities do not show any role in academic achievement. Results further reveal a significant mediating role of psychological resources in the capital–achievement relation. Results demonstrate that in the Indian higher education system, various forms of capital largely shape academic achievement and psychological resources significantly facilitate this relationship. Though the individual mindset can help in breaking this capital–achievement nexus, mostly it seems to be facilitating the relation. The results and implications of the study are discussed.


2021 ◽  
Vol 298 (5 Part 1) ◽  
pp. 150-154
Author(s):  
HALYNA IVANCHENKO ◽  

The article analyzes the importance of corporate culture in the company. The main structural elements of corporate culture are identified. It is established what features are situational factors on the organizational culture implemented in the company. Corporate culture is formed under the influence of natural and directed factors. The first are the external environment in which the organization operates, including social norms, market and economic situation, the place of organization in society. The second group of factors that produce the company’s culture are purposeful actions of management and employees. Situational factors under the influence of which the corporate culture in business currently operates influence the behavior of both the individual employee and the team as a whole. In the most effective organizations, culture supports and promotes the goals and strategies of the company. Standards and expectations help employees work to achieve company success. It is also noted that for the maintenance and development of corporate culture in the context of the COVID-19 pandemic, such components as corporate values, the role of leader and the brand of the employer are important. Corporate values, which are spelled out in internal documents and transmitted to employees on a periodic basis, form the company’s reputation. Leadership serves as a behavioral guideline in the activities of the company’s employees, allows to increase their productivity. The brand of the employer is an important factor that determines the external and internal image of the organization in the long run. It is suggested that in order to improve the existing or form a new corporate culture, the company should conduct a detailed analysis of changes in the organization, eliminate outdated practices that have lost their meaning and get feedback from employees on the main key elements of a new or improved corporate culture. Corporate culture management is an important element in the life of the company. Diagnosis of corporate culture allows you to determine the strength of the company’s culture, which, in turn, makes it possible to predict the stability of the company under the influence of external and internal destructive factors.


2018 ◽  
Vol 31 (12) ◽  
pp. 479-487
Author(s):  
Edwin Kamau ◽  
Richard Bonneau ◽  
Xiang-Peng Kong

Abstract447-52D (447) is a human monoclonal antibody that recognizes a conserved epitope in the crown region of the third variable loop (V3) of HIV-1 gp120, and like many anti-HIV-1 antibodies with broad neutralization capabilities, it has a long heavy-chain complementarity determining region (CDRH3). Here, we use a combination of computational mutagenesis and modeling in tandem with fluorescence polarization assays to interrogate the molecular basis of 447 CDRH3 length and the individual contribution of selected CDRH3 residues to affinity. We observe that 447 CDRH3 length provides a large binding surface area and the best enthalpic contributions derived from hydrophobic packing, main-chain hydrogen bonds, electrostatic and van der Waals interactions. We also found out that CDRH3 residue Try100I is critical to 447 binding affinity.


2021 ◽  
Vol 6 (56) ◽  
pp. eabd0272
Author(s):  
J. F. Boudet ◽  
J. Lintuvuori ◽  
C. Lacouture ◽  
T. Barois ◽  
A. Deblais ◽  
...  

A swarm of simple active particles confined in a flexible scaffold is a promising system to make mobile and deformable superstructures. These soft structures can perform tasks that are difficult to carry out for monolithic robots because they can infiltrate narrow spaces, smaller than their size, and move around obstacles. To achieve such tasks, the origin of the forces the superstructures develop, how they can be guided, and the effects of external environment, especially geometry and the presence of obstacles, need to be understood. Here, we report measurements of the forces developed by such superstructures, enclosing a number of mindless active rod-like robots, as well as the forces exerted by these structures to achieve a simple function, crossing a constriction. We relate these forces to the self-organization of the individual entities. Furthermore, and based on a physical understanding of what controls the mobility of these superstructures and the role of geometry in such a process, we devise a simple strategy where the environment can be designed to bias the mobility of the superstructure, giving rise to directional motion. Simple tasks—such as pulling a load, moving through an obstacle course, or cleaning up an arena—are demonstrated. Rudimentary control of the superstructures using light is also proposed. The results are of relevance to the making of robust flexible superstructures with nontrivial space exploration properties out of a swarm of simpler and cheaper robots.


2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Keith De'Bell ◽  
Roberta Clark

Large interprofessional teams are complex systems in which the expertise of the individual team members interact with the health situation and the external environment in the delivery of modern day health care. The need for coordinating leadership and the (dynamical) need for appropriate expertise to come to the fore involves a tension between the traditional role of the team leader as authority figure and the collaborative leadership preferred by individual team members in their field of expertise. Mindful leadership may provide the leader attributes that allow for and facilitate emergent team structures to meet system changes required in implementing patient and family-centred care. In this paper, we discuss the nature of these attributes and their implications for models of interprofessional teams.


Sign in / Sign up

Export Citation Format

Share Document