International journal of chemical & material sciences
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Published By Suryasa And Sons

2632-9468

2022 ◽  
Vol 5 (1) ◽  
pp. 1-4
Author(s):  
Kh. A. Khaydarova ◽  
F. M. Nurutdinova ◽  
G. A. Ikhtiyarova ◽  
A. A. Khaydarov

The article provides data on the development of a new thickening composition for printing cotton-lye fabric with antibacterial properties based on biodegradable polymers Chitosan synthesized from Apis Mellifera bee dead with CMC with addition of CMC and synthetic hydrolyzed acrylic emulsion. Studied the fungicidal properties of the developed mixed thickener for active dyes used in printing fabrics. As a result of observations, it was revealed that these new thickeners on the basis of exhibit pronounced antimicrobial activity in relation to the micelle fungus Aspergillus terreus. The optical density of the samples shows that these thickeners are resistant to mycelial fungi. Among thickeners, thickeners based on Uzhitan-?MS-HAE, Uzkhitan-CMS have the most pronounced bactericidal activity, and these thickeners are more stable, they can be used the next day and even on the second day for printing mixed fabrics.


Author(s):  
Kh. A. Khaydarova ◽  
F. M. Nurutdinova ◽  
G. A. Ikhtiyarova ◽  
A. A. Khaydarov

The article provides data on the development of a new thickening composition for printing cotton-lye fabric with antibacterial properties based on biodegradable polymers Chitosan synthesized from Apis Mellifera bee dead with CMC with addition of CMC and synthetic hydrolyzed acrylic emulsion. Studied the fungicidal properties of the developed mixed thickener for active dyes used in printing fabrics. As a result of observations, it was revealed that these new thickeners on the basis of exhibit pronounced antimicrobial activity in relation to the micelle fungus Aspergillus terreus. The optical density of the samples shows that these thickeners are resistant to mycelial fungi. Among thickeners, thickeners based on Uzhitan-?MS-HAE, Uzkhitan-CMS have the most pronounced bactericidal activity, and these thickeners are more stable, they can be used the next day and even on the second day for printing mixed fabrics.


2021 ◽  
Vol 4 (1) ◽  
pp. 43-48
Author(s):  
I Gusti Agung Putra Adnyana ◽  
I Ketut Sukarasa ◽  
Komang Ngurah Suarbawa

The development of permanent magnet-based rare earth metals becomes a serious problem if the raw materials are difficult to find. The solution chosen is to utilize an oxide-based permanent magnet with little substitution of rare earth metals. In this study presented a permanent magnetic synthesis of barium hexaferrite-based oxides that were doped with La and Ce atoms. The synthesis of this material uses the wet mechanical milling technique to obtain the single phase permanent magnet system Ba1-x-yLaxCeyFe12O19 (x = 0, 0.02, 0.04 and y = 0. 0.05, 0.1). The precursor is weighed according to stoichiometric composition and is milled for 5 hours then compressed at a pressure of 7000 Psi. Sintering temperature for the formation of the barium hexaferrite phase at 1200oC for 2 hours. All samples after sintering were characterized using XRD and EDS.  A single phase is obtained on all sample compositions with a hexagonal P63/mmc structure and is supported by elemental analysis data that each substituted sample contains elements La and Ce. Lattice parameters a, b, and c appear to decrease with increasing concentrations of La and Ce doping ions with a ratio of c/a in the range of 3.93-3.94.


2021 ◽  
Vol 4 (1) ◽  
pp. 37-42
Author(s):  
Khayitov Odiljon Gafurovich

The article examines the methods of increasing the productivity of wells of gas and gas condensate reservoirs in the south-eastern part of the Bukhara-Khiva region (BHR). The role of gas calculation methods in determining the gas reserve of Mesopotamia in sveza with an increase in the share of gas reserves from 1 to 10 million tons of conventional fuel is shown. Certain difficulties have been identified in the issue of reliable determination of gas reserves in the limited fund of wells and large ranges of changes in calculated parameters. The determining significance of the value of gas reserves in calculating the forecast indicators of the development and technologies of their extraction is justified. It is established that increasing the degree of reliability of calculating gas reserves ensures the efficiency of its extraction, as well as the rational use of material and technical resources and financial capabilities of the enterprise. The advantages of such methods for determining gas reserves as the volume method, the material balance method, and static models are disclosed. A specific description of each of these methods and their application for calculating gas reserves at the Northern Guzar field is given.


2021 ◽  
Vol 4 (1) ◽  
pp. 33-36
Author(s):  
Ni Wayan Sukma Antari ◽  
Ida Ayu Manik Damayanti ◽  
Nadya Treesna Wulansari

This study aims to determine the content of antioxidants, carbohydrates, and protein in Sorghum (Sorghum bicolor L. Moench) as an economically functional food ingredient during the COVID-19 pandemic. The research stages include the manufacture of sorghum seed extract, Antioxidant level testing using the DPPH test, carbohydrate content testing, and protein content determination using the Kjeldahl method, the Kjeldahl method consists of 3 stages, namely: the destruction stage, the distillation stage, and the titration stage. The results showed that Sorghum had an IC50 value of 88.8970 ppm, carbohydrate content of 71.8 g, and protein content of 9.68%. so that sorghum has the potential to develop functional food during the COVID-19 pandemic.


2021 ◽  
Vol 4 (1) ◽  
pp. 27-32
Author(s):  
Putu Rima Sintyadewi ◽  
I Gusti Agung Yogi Rabani RS ◽  
Nadya Treesna Wulansari

Free radicals are one of the triggering factors for degenerative diseases. Free radical activity can be minimized or prevented in the presence of antioxidant compounds. The butterfly pea flower (Clitoria ternatea L.) has long been used as a traditional medicine to cure various diseases. Previous research has shown that the Butterfly pea flower has bioactive compounds, one of which is flavonoids, which act as antioxidants. Butterfly pea flower can be used as another substitute in making black tea-based kombucha drinks. Kombucha fermentation can increase the benefits of Butterfly pea flower with the presence of organic acids, minerals, and vitamins produced during the fermentation process. This study aims to determine the effect of fermentation time on chemical characteristics including pH, reducing sugar content, and antioxidant activity. Based on analysis of variance ANOVA showed that the length of time fermentation had a very significant effect (P>0.01) on pH, reducing sugar content and antioxidant activity of black tea and Butterfly pea flower kombucha. The longer the fermentation time, the lower the pH and sugar content in the medium. Optimum antioxidant activity occurred on the 8th day of fermentation in the variation of treatment P3 (3:3) which was 89.74%. These results indicate that black tea kombucha and Butterfly pea flower are categorized as having high antioxidant activity at the interval of 68.45% to 89.74%.


2021 ◽  
Vol 4 (1) ◽  
pp. 20-26
Author(s):  
Ida Ayu Putu Ary Widnyani ◽  
I Gusti Agung Yogi Rabani RS

Snack bar is a snack that is consumed between meals. Snack bars are usually made from nuts, cereals, and dried fruit. Snack bars are made to meet nutritional intake and overcome hunger amid busy activities. Snack bar products made from local raw materials need to be developed considering the many sources of food that have functional benefits. Samples were tested for carbohydrate, protein, fat, moisture content, and ash content. The results obtained were then statistically analyzed using a completely randomized design analysis. The study used 7 treatments and 3 replications so that the researcher had 21 experimental units. The comparison treatment of gude bean flour with red beans and kratok beans on snack bar products has a carbohydrate content of 41.826 – 45.310%, protein 13,234 – 33,869%, fat 10.046 – 10.796%, ash content 0.704 – 1.343%, and water content 6.344 – 6.819%.


2020 ◽  
Vol 3 (1) ◽  
pp. 20-25
Author(s):  
María Isabel Santana Vergara ◽  
María Fernanda Argandoña Mendoza ◽  
Rosmary Olga García Mejía ◽  
Yandri Alberto Zambrano ◽  
Maria Elena Moya Martínez

The United Nations Educational and Cultural Organization, believes that one of the main axes of orientation is emotional intelligence since individual skill will depend on it; taking into account, that education is the process of formation closely related to the affectivity related to emotions. Although some authors agree in several articles, this way of discussing emotion-related abilities must have generated, in each individual, there must be that general form of knowledge and skills that make this unfold in society interacting with emotional intelligence and affective expressing concepts about the subject. One of the problems, that Emotional Inelegancy, raises is that it compares with emotional competence the ignorance of this theory has produced a great interest in the educational environment as a way of improving educational quality and socio-emotional development, several publications allege positive changes within the classroom that started. As something, empirical ended with a construct developing the theories and instruments developed by providing development in the educational community and the classroom.


2020 ◽  
Vol 3 (1) ◽  
pp. 12-19
Author(s):  
Ricardo Fabricio Muñoz Farfán ◽  
Telly Yarita Macías Zambrano ◽  
Victor Manuel Delgado Sosa ◽  
Jorge Daniel Menéndez López ◽  
Germán Temístocles Ramos León

One of the problems encountered today is the inefficiency of refrigeration systems and electrical equipment. The present study proposes the manufacture of a refrigeration chamber that responds to a great variety of needs both in industrial processes, medicine, and domestic service, becoming an indispensable process within the socio-productive sector. The proposed system has an investigative scope, as a contribution to the agricultural food sector for the derivation of variables and the behavior of products (plants-food) and its method of conservation for quality towards the consumer. The type of investigation responds to the experimentation supported by an observation card with variable rate testing tests. Given the aforementioned, a freezing and refrigeration system is elaborated, taking advantage and optimizing an air conditioning system that works up to 24°C in the room and under the modification obtain temperatures of -15°C, starting from an average temperature of 29°C and a 65% relative humidity of the outside.


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