Ioana Stanciu | University of Bucharest (original) (raw)
Papers by Ioana Stanciu
Oriental Journal of Chemistry, 2024
The history of biodegradable lubricants has been presented in a series of articles, works and pat... more The history of biodegradable lubricants has been presented in a series of articles, works and patents. Biodegradable lubricants are used to improve the properties of mineral oils or vegetable oils. To improve the properties of the oils, a wide range of biodegradable lubricants based on polymers were synthesized. A series of researches are related to the production of biodegradable lubricating oils that also possess a food-type non-toxic character.
International Journal of Chemical and Biological Sciences, 2024
The history of biodegradable lubricants has been presented in a series of articles, works and pat... more The history of biodegradable lubricants has been presented in a series of articles, works and patents. These biodegradable lubricants are used to improve the properties of mineral oils or vegetable oils. To improve the properties of the oils, a wide range of biodegradable lubricants based on polymers were synthesized. A series of researches are related to the production of biodegradable lubricating oils that also possess a food-type non-toxic character.
Journal of Applied Chemical Science International, 2024
In this article, we determined the chemical composition of butanoic acid using FTIR spectroscopy.... more In this article, we determined the chemical composition of butanoic acid using FTIR spectroscopy. It is a short chain saturated fatty acid found in the form of esters in animal fats and plant oils. Acid butanoic is used in the manufacture of esters for artificial flavourings, as a food additive, in the manufacture of varnishes, and in decalcifying hides used in the manufacture of perfume, flavourings, pharmaceuticals, and disinfectants, used as an important flavouring agent in a number of food, including beer and may be present in cosmetic and detergent preparation. From the spectroscopy data, it appears that it is composed of groups: hydroxyl O-H, C-H stretching vibrations and-C=O stretching vibration.
In this review, we have concluded the rheological behavior of the unadded and additived soybean o... more In this review, we have concluded the rheological behavior of the unadded and additived soybean oil with nanoadditives. The used soybean oil can be used for biodegradable lubricant. The mathematical model that best describes the rheological behavior is the power law model that also includes the nanoadditive concentration. Power-law modeling of the shear stress-strain rate dependence has a small correlation coefficient due to the hysteresis loop. If only the load curve is considered, the dependence has a tendency close to the linear one.
Journal of Research in Chemistry, 2024
In this review I have presented a brief history of biodegradable lubricants presented in a series... more In this review I have presented a brief history of biodegradable lubricants presented in a series of articles, works and patents. Biodegradable lubricants are used to improve the properties of mineral oils or vegetable oils. A wide range of polymers have been synthesized to improve the properties of oils. A series of researches are related to the production of biodegradable lubricating oils that also possess a food-type non-toxic character.
International Journal of Multidisciplinary Research and Publications, 2024
The history of biodegradable lubricants has been presented in a series of articles, works and pat... more The history of biodegradable lubricants has been presented in a series of articles, works and patents. These biodegradable lubricants are used to improve the properties of mineral oils or vegetable oils. To improve the properties of the oils, a wide range of biodegradable lubricants based on polymers were synthesized. A series of researches are related to the production of biodegradable lubricating oils that also possess a food-type non-toxic characte
Oriental Journal of Chemistry, 2024
In this article we studied chocolate with 100% cocoa without lecithin and traces of milk in the f... more In this article we studied chocolate with 100% cocoa without lecithin and traces of milk in
the form of chips. The data obtained are in accordance with those obtained from the specialized
literature. This article proposes two relations of dependence of log dynamic viscosity on log shear
rate. The relations determined by second-order polynomial and exponential fitting can be successfully
applied to confectionery products because the obtained correlation coefficients are close to unity.
Asian Journal of Advances in Research, 2024
In this study, we have concluded the rheological behavior of the unadded and additived soybean oi... more In this study, we have concluded the rheological behavior of the unadded and additived soybean oil with nanoadditives. The used soybean oil can be used for biodegradable lubricant. The mathematical model that best describes the rheological behavior is the power law model that also includes the nanoadditive concentration. Power-law modeling of the shear stress-strain rate dependence has a small correlation coefficient due to the hysteresis loop. If only the load curve is considered, the dependence has a tendency close to the linear one.
Oriental Journal of Chemistry, 2024
The first archaeological mentions of cacao date back nearly 4,000 years and were discovered by re... more The first archaeological mentions of cacao date back nearly 4,000 years and were discovered by researchers in Central America and Mexico. Chocolate is a compound that contains milk powder, cocoa, sugar, vanilla sugar and water. This article presents two rheological equations determined by the method of least squares and whose coefficients depend on the chocolate concentration and temperature. We used a DV-3P Anton Paar digital rotational viscometer.
Oriental Journal of Chemistry, 2024
This article proposes a polynomial equation and another exponential equation of the second order ... more This article proposes a polynomial equation and another exponential equation of the second order that describes the rheological behavior of chocolate. The second-order polynomial and exponential functions describe the non-Newtonian behavior of chocolate in the temperature range of 36 and 44°C. The rheological study of the chocolate was carried out at the shear speed of the chocolate wa between 0.1s-1 and 68s-1 .
Oriental Journal of Chemistry, 2024
Sesame (Sesamum indicum) oil is the fatty matter obtained from sesame seeds, by cold pressing or ... more Sesame (Sesamum indicum) oil is the fatty matter obtained from sesame seeds, by cold pressing or hot pressing, followed by refining. The seeds must have a maximum moisture content of 7% and must be free of foreign bodies. After pressing, the oil is decanted and then filtered, through a natural cotton filter, thus ensuring the superior quality of the obtained oil. Sesame oil is the most resistant oil to oxidation and is stable at room temperature. The burning point is 177 degrees for cold pressed sesame oil.
Oriental Journal of Chemistry, 2023
Vegetable oils are often associated with well-known varieties like sunflower, olive, and corn. Ho... more Vegetable oils are often associated with well-known varieties like sunflower, olive, and corn. However, there are lesser-known options worth exploring to appreciate their distinct qualities. One such overlooked oil is cottonseed oil, derived from the Malvaceae cotton family plant. In a recent study, we delved into the rheological behavior of cottonseed oil. Similar to many vegetable oils, it exhibits a non-Newtonian behavior, making it a viable alternative to mineral oils. The rheological analysis was conducted using the Brookfield RVDV III Ultra Rheometer, with shear rates incrementally increasing.
Oriental Journal of Chemistry, 2023
Almond (Prunus amygdalus) oil is recommended for those for whom other treatments to remedy hair l... more Almond (Prunus amygdalus) oil is recommended for those for whom other treatments to remedy hair loss problems have not worked. Almond oil was studied at increasing temperatures and shear rates and we obtained the rheological parameters corresponding to the oil through regression. This paper reflects a study on the rheology of almond oil used as biodegradable lubricant using the Brookfield RVDV II I Ultra Rheometer system.
Oriental Journal of Chemistry, 2023
Corn must go through a complex refining process to produce corn oil. This process gives corn oil ... more Corn must go through a complex refining process to produce corn oil. This process gives corn oil many unique characteristics, although not all of them are positive. Corn oil is 100% fat, with no protein or carbohydrates. One tablespoon (15 mL) of corn oil contains: calories: 122; fats: 14 g and vitamin E: 13% of the recommended daily intake. This article represents the dependence of dynamic viscosity on temperature for Corn oil. It was studied with the Rheotest VT 550 system at shear rates and increasing temperatures.
Oriental Journal of Chemistry, 2023
The rheological behavior of corn oil can be studied with four rheological models found in the spe... more The rheological behavior of corn oil can be studied with four rheological models found in the specialized literature.The rheological behavior of corn oil can be analyzed if it is subjected to an increasing shear rate. The behavior of this fluid can be appreciated based on the experimental data, graphically representing the variation the shearing stress with the shear velocity. This curve represents the mathematical model of the rheological behavior of the product. The rheological behavior of the corn oil was analyzed with the mixing rheometer type Viscotester VT 550 (Haake).
Oriental Journal of Chemistry, 2023
In this article I presented the rheological behavior of corn oil studied in the temperature range... more In this article I presented the rheological behavior of corn oil studied in the temperature range 40-100°C and shear rates between 3.3 and 1312.0 s-1. The experiments showed the decrease of dynamic viscosity with temperature and shear rate. To study the dependence of dynamic viscosity on temperature, we applied two equations that perfectly describe the rheological behavior of corn oil. These equations are the Andrade equation and the Azian equation for which the correlation coefficients have values close to unity.
Oriental Journal of Chemistry, 2023
Olive oil is a vegetable oil used mainly in the culinary field, which is extracted from freshly h... more Olive oil is a vegetable oil used mainly in the culinary field, which is extracted from freshly harvested olive fruits (Olea europaea). It is the richest source of monounsaturated fats. Its uses are varied, being used in cooking, in cosmetics, medicines and soaps, and in the past as lamp oil. This article presents the experimental research carried out in order to quantify the change in the rheological properties of Olive oil and establish the variation range of the characteristic parameters. The data obtained are useful for the behavior of the engine and, in particular, of lubricants in general.
Oriental Journal Of Chemistry
The purpose of this article is to determine the rheological behavior of fruit and vegetable puree... more The purpose of this article is to determine the rheological behavior of fruit and vegetable purees as well as tomato sauces at a temperature of 250C and to find in the literature a rheological model that describes their behavior. Fruit and vegetable purees as well as tomato sauces have a non-Newtonian behavior. These were studied with the Brookfield DV-III Ultra reovascometer at 250C. The Herschel-Bulkley model was found for products with pseudoplastic behavior, while the law of power and the Bingham model for the others. The clarified and desiccated fruit juices as well as the carrot juice showed a Newtonian behavior.
Oriental Journal Of Chemistry
In this article we studied the olive oil extracted from the cold pressed fruits and separated by ... more In this article we studied the olive oil extracted from the cold pressed fruits and separated by centrifugation. The rheological models found in the literature for the dependence of the shear rate on the shear stress are: the Herschel – Bulkley model, the Ostwald model and the Bingham model. By linearizing the obtained data, we found two models that describe the behavior of the oil at the temperatures at which the olive oil was studied. Olive oil has a non-Newtonian behavior.
Oriental Journal of Chemistry, 2024
The history of biodegradable lubricants has been presented in a series of articles, works and pat... more The history of biodegradable lubricants has been presented in a series of articles, works and patents. Biodegradable lubricants are used to improve the properties of mineral oils or vegetable oils. To improve the properties of the oils, a wide range of biodegradable lubricants based on polymers were synthesized. A series of researches are related to the production of biodegradable lubricating oils that also possess a food-type non-toxic character.
International Journal of Chemical and Biological Sciences, 2024
The history of biodegradable lubricants has been presented in a series of articles, works and pat... more The history of biodegradable lubricants has been presented in a series of articles, works and patents. These biodegradable lubricants are used to improve the properties of mineral oils or vegetable oils. To improve the properties of the oils, a wide range of biodegradable lubricants based on polymers were synthesized. A series of researches are related to the production of biodegradable lubricating oils that also possess a food-type non-toxic character.
Journal of Applied Chemical Science International, 2024
In this article, we determined the chemical composition of butanoic acid using FTIR spectroscopy.... more In this article, we determined the chemical composition of butanoic acid using FTIR spectroscopy. It is a short chain saturated fatty acid found in the form of esters in animal fats and plant oils. Acid butanoic is used in the manufacture of esters for artificial flavourings, as a food additive, in the manufacture of varnishes, and in decalcifying hides used in the manufacture of perfume, flavourings, pharmaceuticals, and disinfectants, used as an important flavouring agent in a number of food, including beer and may be present in cosmetic and detergent preparation. From the spectroscopy data, it appears that it is composed of groups: hydroxyl O-H, C-H stretching vibrations and-C=O stretching vibration.
In this review, we have concluded the rheological behavior of the unadded and additived soybean o... more In this review, we have concluded the rheological behavior of the unadded and additived soybean oil with nanoadditives. The used soybean oil can be used for biodegradable lubricant. The mathematical model that best describes the rheological behavior is the power law model that also includes the nanoadditive concentration. Power-law modeling of the shear stress-strain rate dependence has a small correlation coefficient due to the hysteresis loop. If only the load curve is considered, the dependence has a tendency close to the linear one.
Journal of Research in Chemistry, 2024
In this review I have presented a brief history of biodegradable lubricants presented in a series... more In this review I have presented a brief history of biodegradable lubricants presented in a series of articles, works and patents. Biodegradable lubricants are used to improve the properties of mineral oils or vegetable oils. A wide range of polymers have been synthesized to improve the properties of oils. A series of researches are related to the production of biodegradable lubricating oils that also possess a food-type non-toxic character.
International Journal of Multidisciplinary Research and Publications, 2024
The history of biodegradable lubricants has been presented in a series of articles, works and pat... more The history of biodegradable lubricants has been presented in a series of articles, works and patents. These biodegradable lubricants are used to improve the properties of mineral oils or vegetable oils. To improve the properties of the oils, a wide range of biodegradable lubricants based on polymers were synthesized. A series of researches are related to the production of biodegradable lubricating oils that also possess a food-type non-toxic characte
Oriental Journal of Chemistry, 2024
In this article we studied chocolate with 100% cocoa without lecithin and traces of milk in the f... more In this article we studied chocolate with 100% cocoa without lecithin and traces of milk in
the form of chips. The data obtained are in accordance with those obtained from the specialized
literature. This article proposes two relations of dependence of log dynamic viscosity on log shear
rate. The relations determined by second-order polynomial and exponential fitting can be successfully
applied to confectionery products because the obtained correlation coefficients are close to unity.
Asian Journal of Advances in Research, 2024
In this study, we have concluded the rheological behavior of the unadded and additived soybean oi... more In this study, we have concluded the rheological behavior of the unadded and additived soybean oil with nanoadditives. The used soybean oil can be used for biodegradable lubricant. The mathematical model that best describes the rheological behavior is the power law model that also includes the nanoadditive concentration. Power-law modeling of the shear stress-strain rate dependence has a small correlation coefficient due to the hysteresis loop. If only the load curve is considered, the dependence has a tendency close to the linear one.
Oriental Journal of Chemistry, 2024
The first archaeological mentions of cacao date back nearly 4,000 years and were discovered by re... more The first archaeological mentions of cacao date back nearly 4,000 years and were discovered by researchers in Central America and Mexico. Chocolate is a compound that contains milk powder, cocoa, sugar, vanilla sugar and water. This article presents two rheological equations determined by the method of least squares and whose coefficients depend on the chocolate concentration and temperature. We used a DV-3P Anton Paar digital rotational viscometer.
Oriental Journal of Chemistry, 2024
This article proposes a polynomial equation and another exponential equation of the second order ... more This article proposes a polynomial equation and another exponential equation of the second order that describes the rheological behavior of chocolate. The second-order polynomial and exponential functions describe the non-Newtonian behavior of chocolate in the temperature range of 36 and 44°C. The rheological study of the chocolate was carried out at the shear speed of the chocolate wa between 0.1s-1 and 68s-1 .
Oriental Journal of Chemistry, 2024
Sesame (Sesamum indicum) oil is the fatty matter obtained from sesame seeds, by cold pressing or ... more Sesame (Sesamum indicum) oil is the fatty matter obtained from sesame seeds, by cold pressing or hot pressing, followed by refining. The seeds must have a maximum moisture content of 7% and must be free of foreign bodies. After pressing, the oil is decanted and then filtered, through a natural cotton filter, thus ensuring the superior quality of the obtained oil. Sesame oil is the most resistant oil to oxidation and is stable at room temperature. The burning point is 177 degrees for cold pressed sesame oil.
Oriental Journal of Chemistry, 2023
Vegetable oils are often associated with well-known varieties like sunflower, olive, and corn. Ho... more Vegetable oils are often associated with well-known varieties like sunflower, olive, and corn. However, there are lesser-known options worth exploring to appreciate their distinct qualities. One such overlooked oil is cottonseed oil, derived from the Malvaceae cotton family plant. In a recent study, we delved into the rheological behavior of cottonseed oil. Similar to many vegetable oils, it exhibits a non-Newtonian behavior, making it a viable alternative to mineral oils. The rheological analysis was conducted using the Brookfield RVDV III Ultra Rheometer, with shear rates incrementally increasing.
Oriental Journal of Chemistry, 2023
Almond (Prunus amygdalus) oil is recommended for those for whom other treatments to remedy hair l... more Almond (Prunus amygdalus) oil is recommended for those for whom other treatments to remedy hair loss problems have not worked. Almond oil was studied at increasing temperatures and shear rates and we obtained the rheological parameters corresponding to the oil through regression. This paper reflects a study on the rheology of almond oil used as biodegradable lubricant using the Brookfield RVDV II I Ultra Rheometer system.
Oriental Journal of Chemistry, 2023
Corn must go through a complex refining process to produce corn oil. This process gives corn oil ... more Corn must go through a complex refining process to produce corn oil. This process gives corn oil many unique characteristics, although not all of them are positive. Corn oil is 100% fat, with no protein or carbohydrates. One tablespoon (15 mL) of corn oil contains: calories: 122; fats: 14 g and vitamin E: 13% of the recommended daily intake. This article represents the dependence of dynamic viscosity on temperature for Corn oil. It was studied with the Rheotest VT 550 system at shear rates and increasing temperatures.
Oriental Journal of Chemistry, 2023
The rheological behavior of corn oil can be studied with four rheological models found in the spe... more The rheological behavior of corn oil can be studied with four rheological models found in the specialized literature.The rheological behavior of corn oil can be analyzed if it is subjected to an increasing shear rate. The behavior of this fluid can be appreciated based on the experimental data, graphically representing the variation the shearing stress with the shear velocity. This curve represents the mathematical model of the rheological behavior of the product. The rheological behavior of the corn oil was analyzed with the mixing rheometer type Viscotester VT 550 (Haake).
Oriental Journal of Chemistry, 2023
In this article I presented the rheological behavior of corn oil studied in the temperature range... more In this article I presented the rheological behavior of corn oil studied in the temperature range 40-100°C and shear rates between 3.3 and 1312.0 s-1. The experiments showed the decrease of dynamic viscosity with temperature and shear rate. To study the dependence of dynamic viscosity on temperature, we applied two equations that perfectly describe the rheological behavior of corn oil. These equations are the Andrade equation and the Azian equation for which the correlation coefficients have values close to unity.
Oriental Journal of Chemistry, 2023
Olive oil is a vegetable oil used mainly in the culinary field, which is extracted from freshly h... more Olive oil is a vegetable oil used mainly in the culinary field, which is extracted from freshly harvested olive fruits (Olea europaea). It is the richest source of monounsaturated fats. Its uses are varied, being used in cooking, in cosmetics, medicines and soaps, and in the past as lamp oil. This article presents the experimental research carried out in order to quantify the change in the rheological properties of Olive oil and establish the variation range of the characteristic parameters. The data obtained are useful for the behavior of the engine and, in particular, of lubricants in general.
Oriental Journal Of Chemistry
The purpose of this article is to determine the rheological behavior of fruit and vegetable puree... more The purpose of this article is to determine the rheological behavior of fruit and vegetable purees as well as tomato sauces at a temperature of 250C and to find in the literature a rheological model that describes their behavior. Fruit and vegetable purees as well as tomato sauces have a non-Newtonian behavior. These were studied with the Brookfield DV-III Ultra reovascometer at 250C. The Herschel-Bulkley model was found for products with pseudoplastic behavior, while the law of power and the Bingham model for the others. The clarified and desiccated fruit juices as well as the carrot juice showed a Newtonian behavior.
Oriental Journal Of Chemistry
In this article we studied the olive oil extracted from the cold pressed fruits and separated by ... more In this article we studied the olive oil extracted from the cold pressed fruits and separated by centrifugation. The rheological models found in the literature for the dependence of the shear rate on the shear stress are: the Herschel – Bulkley model, the Ostwald model and the Bingham model. By linearizing the obtained data, we found two models that describe the behavior of the oil at the temperatures at which the olive oil was studied. Olive oil has a non-Newtonian behavior.