scholarly journals Critical flocculation concentration for polyvalent ions using silica nanoparticles; a new version of Schulze-Hardy rule

2020 ◽  
Vol 38 (9-10) ◽  
pp. 435-449
Author(s):  
Rogelio Rodriguez ◽  
Susana Vargas
Keyword(s):  
Aqueous Solution ◽  
Silica Nanoparticles ◽  
Optimal Amount ◽  
Different Types ◽  
Initial Ph ◽  
Correct Determination ◽  
Critical Flocculation Concentration ◽  
The Right ◽  
Flocculation Time

Critical Flocculation Concentration (CFC) is an important quantity because allows to know the optimal amount of flocculant required to remove (adsorb) specific quantities of metal ions in aqueous solution allowing to reduce both, the flocculation time and the excess of unreacted flocculant; this unreacted material produces, by itself, an additional contamination. The results reported here show that the standard Schulze-Hardy-Rule (SHR), based only in the valence z, is not longer valid to obtain the right values of CFC. In this work it is reported a correct determination of CFC for di- and tri-valent ions using different types of silica nanoparticles. Both, the initial pH slope (-pHo) and the valence z are required to determine correctly the CFC. The proposed modified version for CFC is CFC ∝ [(-pHo)z]−1.

Application of Silica Nanoparticles in the Determination of Herbicides in Environmental Water Samples Using Liquid Chromatography-Mass Spectroscopy

2020 ◽  
Vol 16 (5) ◽  
pp. 748-756
Author(s):  
Mir Waqas Alam ◽  
Tentu Nageswara Rao ◽  
Yarasani Prashanthi ◽  
Vourse Sridhar ◽  
Adil Alshoaibi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Liquid Chromatography ◽  
Silica Nanoparticles ◽  
Solid Phase ◽  
Silica Nanoparticle ◽  
Environmental Water ◽  
Phase Extraction ◽  
Functionalized Nanoparticles ◽  
Supporting Material

Background: Herbicides are very beneficial in the crop yield with the aid of controlling weeds within the agriculture, but several herbicides are chronic in soil. Objective: In this study, nanoparticles and the packages of synthesized novel silica nanoparticles were studied for the preconcentration of herbicides. Methods: These nanoparticles prepared by the Stöber mechanism were purified and functionalized. Nanoparticles thus prepared successfully were used as supporting material for the preconcentration of residues of herbicides in the water. Results: Preconcentration was achieved by preparing the silica-based solid-phase-extraction cartridges. Nanoparticles used for this purpose were within the range of 50-250 nm. An SPE cartridge was prepared by packing 200 mg of silica nanoparticle in the empty cartridge of diameter 5.5 cm and length 0.6 cm in between PTFE frits. Aqueous solutions of 0.1 μg/ml of herbicides were prepared separately, and 10 ml of the solution was passed through the cartridge at the rate of 0.2 ml/min. After passing 10 ml volume of the aqueous solution, residues adsorbed on the cartridge were eluted using 2 ml of acetonitrile. The eluate was injected to determine the herbicide residue adsorbed on the SPE cartridge. Conclusion: In the study, it was found that greater than 90% of the herbicide residues were trapped on silica nanoparticle-based SPE cartridge. An analytical method was developed for the simultaneous determination of these herbicides. The residues were quantified by LC-MS/MS with ESI mode.

scholarly journals Determination of berberine hydrochloride using a fluorimetric method with silica nanoparticles as a probe

RSC Advances ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 6075-6082 ◽  
Author(s):  
Qing Liu ◽  
Zhihai Xie ◽  
Tao Liu ◽  
Jin Fan
Keyword(s):  
Aqueous Solution ◽  
Silica Nanoparticles ◽  
Berberine Hydrochloride ◽  
Fluorimetric Method ◽  
Spectrofluorimetric Method

A simple, green and sensitive spectrofluorimetric method was proposed for the determination of berberine hydrochloride (BRH) in aqueous solution.

scholarly journals A Comparison of the Accuracy of the Determination of right Ascension by Means of Transit Instruments of Different Types

1990 ◽  
Vol 141 ◽  
pp. 456-456
Author(s):  
S. P. Izmailov ◽  
N. G. Litkevich ◽  
S. N. Sadzakov ◽  
V. D. Simonenko ◽  
T. I. Suchkova ◽  
...  
Keyword(s):  
Classical Type ◽  
Special Series ◽  
Different Types ◽  
The Mean ◽  
The Right ◽  
Right Ascension

A special series of observations of the groups of stars performed in Pulkovo, Chile, Kharkov and Belgrade were used to compare the mean errors of the right ascension by means of the method eliminating the influence of the errors of the source catalogue. The results show the advantage of the small transit instruments over transit circles of the classical type.

scholarly journals Some directions of improvement of ways of interpretation of procedural administrative-tort legal norms of the customs legislation

2021 ◽  
Vol 66 ◽  
pp. 154-161
Author(s):  
V.V. Lipinsky ◽  
І. О. Skvirsky
Keyword(s):  
Property Rights ◽  
Progressive Increase ◽  
Sufficient Time ◽  
Legal Norms ◽  
Applicable Law ◽  
Correct Determination ◽  
The Right ◽  
Customs Administration ◽  
Administrative Penalty

Having studied the peculiarities of interpretation of administrative-tort provisions of customs legislation establishing the procedure for proceedings on violations of customs rules, the author, in particular, expresses the opinion that in order to ensure the legality and validity of the decision to impose administrative penalties through the correct determination of the circumstances of the case and the applicable law as well as through the choice of a fair type and amount of administrative penalty – the customs legislation on the right to explain the alleged offense and comment on the case should be interpreted in a way that the person prosecuted should be given sufficient time and procedural opportunities to express their position on the legal substantiation of the allegation that they committed an offense and on the proposed penalty, as well as to provide evidence on the circumstances of the case. Also, the author substantiates that the model of termination of proceedings in customs rules violation case on the basis of a compromise, introduced in the customs legislation, needs to be radically improved, because it is built so that this tool of customs administration does not correspond to its nature and purpose since under the current customs law this model demands unconditional admission of guilt and imposition of possible type and amount of administrative penalty, which is unchangeable according to negotiated mutual concessions. Moreover, the motivation of offenders to conclude amicable agreements with customs authorities is limited to avoiding stricter penalties for repeated offenses, which is incompatible with the principle of inevitability of liability and may devalue the progressive increase in penalties. In addition, the author proposes ways to expand the interpretation of customs law on the temporary seizure of goods, vehicles and documents to maximize the protection of property rights of enterprises, which in light of the circumstances may be unreasonable and disproportionate.

EUTANÁSIA E O AUXÍLIO AO SUICÍDIO: UM ESTUDO SOBRE A DESCRIMINALIZAÇÃO DO HOMICÍDIO PIEDOSO

2021 ◽  
Vol 9 (208) ◽  
pp. 1-17
Author(s):  
Rodolfo de Holanda Freitas
Keyword(s):  
Social Context ◽  
Legal System ◽  
Religion And Medicine ◽  
Different Types ◽  
Individual Determination ◽  
The Subject ◽  
The Individual ◽  
The Right ◽  
Historical Scenario

This article will carry out an analysis on the practice of Euthanasia, going through its etymology, historical scenario, principles involved, as well as its understanding in our legal system and social context. In addition, an analysis of a real case in Brazil and a comparison with other countries where the practice is legal is made. This article is mainly aimed at minimally elucidating the controversy surrounding the topic, which is still very stigmatized in our country, since it involves several principles not only of law, but of religion and medicine, making a comparison between them. For the realization of this article, bibliographic research had been carried out through articles, legal sites and news sites, using deductive methodology for its understanding and outcome. There is a great taboo on the subject in our country, given that it can have different types of understanding according to the individual determination of each one, with much debate still remaining so that, finally, sick patients have the right to put their lives the best way possible.

THE FACTORS OF CAREER SELF-DETERMINATION OF STUDENTS OF HIGHER EDUCATION INSTITUTIONS

2019 ◽  
Vol 7 (1) ◽  
pp. 9-20
Author(s):  
Inna Yeung
Keyword(s):  
Higher Education ◽  
Higher Education Institutions ◽  
Well Being ◽  
Young Person ◽  
Self Determination ◽  
Full Time ◽  
Actual Problem ◽  
The Third ◽  
The Right

Choice of profession is a social phenomenon that every person has to face in life. Numerous studies convince us that not only the well-being of a person depends on the chosen work, but also his attitude to himself and life in general, therefore, the right and timely professional choice is very important. Research about factors of career self-determination of students of higher education institutions in Ukraine shows that self-determination is an important factor in the socialization of young person, and the factors that determine students' career choices become an actual problem of nowadays. The present study involved full-time and part-time students of Institute of Philology and Mass Communications of Open International University of Human Development "Ukraine" in order to examine the factors of career self-determination of students of higher education institutions (N=189). Diagnostic factors of career self-determination of students studying in the third and fourth year were carried out using the author's questionnaire. Processing of obtained data was carried out using the Excel 2010 program; factorial and comparative analysis were applied. Results of the study showed that initial stage of career self-determination falls down on the third and fourth studying year at the university, when an image of future career and career orientations begin to form. At the same time, the content of career self-determination in this period is contradictory and uncertain, therefore, the implementation of pedagogical support of this process among students is effective.

KEBIJAKAN MODERASI PIDANA MATI

2017 ◽  
Vol 10 (2) ◽  
pp. 193
Author(s):  
Mei Susanto ◽  
Ajie Ramdan
Keyword(s):  
Human Rights ◽  
Death Penalty ◽  
Capital Punishment ◽  
Criminal Code ◽  
Right To Life ◽  
Life Imprisonment ◽  
Research Results ◽  
Moderation Model ◽  
The Right

ABSTRAKPutusan Nomor 2-3/PUU-V/2007 selain menjadi dasar konstitusionalitas pidana mati, juga memberikan jalan tengah (moderasi) terhadap perdebatan antara kelompok yang ingin mempertahankan (retensionis) dan yang ingin menghapus (abolisionis) pidana mati. Permasalahan dalam penelitian ini adalah bagaimana kebijakan moderasi pidana mati dalam putusan a quo dikaitkan dengan teori pemidanaan dan hak asasi manusia dan bagaimana kebijakan moderasi pidana mati dalam RKUHP tahun 2015 dikaitkan dengan putusan a quo. Penelitian ini merupakan penelitian doktrinal, dengan menggunakan bahan hukum primer dan sekunder, berupa peraturan perundang-undangan, literatur, dan hasil-hasil penelitian yang relevan dengan objek penelitian. Penelitian menyimpulkan, pertama, putusan a quo yang memuat kebijakan moderasi pidana mati telah sesuai dengan teori pemidanaan khususnya teori integratif dan teori hak asasi manusia di Indonesia di mana hak hidup tetap dibatasi oleh kewajiban asasi yang diatur dengan undang-undang. Kedua, model kebijakan moderasi pidana mati dalam RKUHP tahun 2015 beberapa di antaranya telah mengakomodasi amanat putusan a quo, seperti penentuan pidana mati di luar pidana pokok, penundaan pidana mati, kemungkinan pengubahan pidana mati menjadi pidana seumur hidup atau penjara paling lama 20 tahun. Selain itu masih menimbulkan persoalan berkaitan dengan lembaga yang memberikan pengubahan pidana mati, persoalan grasi, lamanya penundaan pelaksanaan pidana mati, dan jenis pidana apa saja yang dapat diancamkan pidana mati.Kata kunci: kebijakan, KUHP, moderasi, pidana mati. ABSTRACTConstitutional Court’s Decision Number 2-3/PUU-V/2007, in addition to being the basis of the constitutionality of capital punishment, also provides a moderate way of arguing between retentionist groups and those wishing to abolish the death penalty (abolitionist). The problem in this research is how the moderation policy of capital punishment in aquo decision is associated with the theory of punishment and human rights and how the moderation policy of capital punishment in the draft Criminal Code of 2015 (RKUHP) is related with the a quo decision. This study is doctrinal, using primary and secondary legal materials, in the form of legislation, literature and research results that are relevant to the object of analysis. This study concludes, firstly, the aquo decision containing the moderation policy of capital punishment has been in accordance with the theory of punishment, specificallyy the integrative theory and the theory of human rights in Indonesia, in which the right to life remains limited by the fundamental obligations set forth in the law. Secondly, some of the modes of moderation model of capital punishment in RKUHP of 2015 have accommodated the mandate of aquo decision, such as the determination of capital punishment outside the main punishment, postponement of capital punishment, the possibility of converting capital punishment to life imprisonment or imprisonment of 20 years. In addition, it still raises issues regarding the institutions that provide for conversion of capital punishment, pardon matters, length of delay in the execution of capital punishment, and any types of crime punishable by capital punishment. Keywords: policy, criminal code, moderation, capital punishment.

Adolescent athletes and nutrition – analysis of two groups of children

2020 ◽  
pp. 1-6
Author(s):  
Tatyana Dzimbova
Keyword(s):  
Energy Expenditure ◽  
Energy Intake ◽  
Eating Habits ◽  
Energy Deficit ◽  
Young Athletes ◽  
Adolescent Athletes ◽  
Basketball Players ◽  
Calcium Magnesium ◽  
The Right

Introduction. Proper nutrition is crucial for child and adolescent athletes to maintain growth and development and to achieveoptimal results in sports. It is very important to balance the energy expenditure with the energy intake in order to prevent the energy deficit or excess.Materials and methods. Subjects involved in two different sports participated in the study: 13 gymnasts (age 13.8 ± 4.1 years, height 153.4 ± 11.3 cm, weight 47.1 ± 10.5 kg) and 15 basketball players (age 15.5 ± 1.1 years, height 176.7 ± 7.9 cm, weight 65.2 ± 10.7 kg). Determination of total energy expenditure was made by prediction equations. The subjects maintained a food records for 5 consecutive days, which were processed in the ASA24 system of the NCI. Results and discussion. Energy intake in both groups is sufficient to meet the daily needs, development of young athletes andprovide the energy needed in training. The intake of three minerals (calcium, magnesium and potassium) and three vitamins (D, E and A) was lower than recommended values in both groups.Conclusion. As a result of the busy schedule of adolescent athletes, their main meals are out of home, and the proportion of highly processed foods containing small amounts of important vitamins and minerals is high. The main recommendations include dairy products, fruits, vegetables and whole grains. The idea behind the changes is to give young athletes the right diet and the right eating habits.

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