chemical products
Recently Published Documents


TOTAL DOCUMENTS

904
(FIVE YEARS 277)

H-INDEX

27
(FIVE YEARS 6)

2022 ◽  
Author(s):  
Prue Oxford ◽  
Margaret C. Hardy

The Australian Pesticides and Veterinary Medicines Authority (APVMA) is a Commonwealth statutory authority responsible for the regulation of agricultural and veterinary chemical products in Australia. Effective regulation is built on engaging with risk in alignment with the relevant legislation, and requires a combination of core public service, foundation, and technical skills, in addition to management and leadership capabilities. Mapping skills, competencies, and capabilities provided the scaffolding for the 2019-21 APVMA Learning and Development Framework (the Framework). As the Framework was established to support blended delivery of distance and face-to-face learning activities, it was largely uninterrupted due to the COVID-19 pandemic as the public service increasingly pivoted to online learning.


Author(s):  
Araceli Guadalupe Romero‐Izquierdo ◽  
Claudia Gutiérrez‐Antonio ◽  
Fernando Israel Gómez‐Castro ◽  
Salvador Hernández

Agronomy ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 146
Author(s):  
Francesco Latterini ◽  
Walter Stefanoni ◽  
Chris Cavalaris ◽  
Christos Karamoutis ◽  
Luigi Pari ◽  
...  

The contribution of castor oil for reaching the targets set by RED1 and RED2 in Europe can be tangible if the problem related to the mechanical harvesting is overcome. Dwarf hybrids suitable for mechanical harvesting are already available on the market but the residual moisture of plants and capsules has to be lowered in order to allow mechanization. In the present case of study, three common terminating products (Glyphosate GLY, Diquat DIQ and Spotlight DEF) were tested on Kaiima C1012 hybrid in a complete randomized block design to assess the effectiveness of using chemical products to decrease residual moisture in castor plants. Plants were harvested via combine harvester equipped with cereal header to evaluate seed loss (due to dehiscence, impact and cleaning shoe) and the dehulling capacity of the combine harvester’s cleaning shoe. DIQ decreased significantly moisture content of capsules (7.32%) in comparison to the other treatments, while the lowest plant moisture was recorded in DIQ (62.38%) and GLY (59.12%). The use of DIQ triggered the highest impact seed loss (61.75%) in comparison with GLY (46.50%) and DEF (29.02%). Control plants could not be harvested mechanically due to the high residual moisture content and high density of weeds. The present case of study provides highlights regarding the need to further investigate the best practice to terminate castor plants and to develop a specific combine header to reduce seed loss from impact.


Author(s):  
Susumu Toko ◽  
Masashi Ideguchi ◽  
Taiki Hasegawa ◽  
Takamasa Okumura ◽  
Kunihiro KAMATAKI ◽  
...  

Abstract CO2 methanation can be a key technology for realizing a sustainable society. CH4 is used as an energy carrier and raw material for chemical products, thereby contributing to the reduction of CO2 emissions. Methanation with plasma catalysis lower the process temperature, which can improve the throughput and stability. In this study, we investigated the effect of the gas flow rate and the discharge volume on CO2 methanation, using a low- pressure CCP reactor. Higher gas flow rates can increase the rate of CO2 throughput, but the CH4 selectivity decreases owing to the reduced transportation rate of the reactants to the catalyst surface. Increasing the discharge volume is effective in improving the transportation rate. This study suggested that the structure of the reactor significantly affect the CH4 generation rate.


Author(s):  
Xiao Chen ◽  
Yong Zou ◽  
Mingkai Zhang ◽  
Wangyan Gou ◽  
Sai Zhang ◽  
...  

Epoxides are versatile intermediates in the production of a diverse set of chemical products. Direct epoxidation of alkene using O2 represents an environmentally friendly and economical process to replace the...


2021 ◽  
Author(s):  
Sara Gücyeter ◽  
Richard Erpelding ◽  
Magnus S. Schmidt

AbstractLignin is a potentially high natural source of biological aromatic substances. However, decomposition of the polymer has proven to be quite challenging, as the complex bonds are fairly difficult to break down chemically. This article is intended to provide an overview of various recent methods for the catalytic chemical depolymerization of the biopolymer lignin into chemical products. For this purpose, nickel-, zeolite- and palladium-supported catalysts were examined in detail. In order to achieve this, various experiments of the last years were collected, and the efficiency of the individual catalysts was examined. This included evaluating the reaction conditions under which the catalysts work most efficiently. The influence of co-catalysts and Lewis acidity was also investigated. The results show that it is possible to control the obtained product selectivity very well by the choice of the respective catalysts combined with the proper reaction conditions.


Author(s):  
Oleg L. Lakhman ◽  
Oleg O. Salagai ◽  
Elena V. Katamanova ◽  
Irina V. Kudaeva ◽  
Olga M. Zhurba ◽  
...  

Introduction. Maintaining health and achieving professional longevity is a priority task of medical support for specialists in the power and civil structures of Russia. It is especially important to take into account the impact of several factors of the labour process, as, for example, in the work to eliminate environmental pollution from enterprises producing chemical products, in particular, in the shop of mercury electrolysis. The study aims to explore the health status of employees of law enforcement agencies and civilian personnel involved in the elimination of environmental pollution in the city of Usolye-Sibirskoye, Irkutsk region as a result of economic activities associated with the production of chemical products. Material and methods. The study examined 370 people, whose average age was 28.4±5.5 years, with an average work experience of 6.0±1.05 years. The method of clinical observations was used, the analysis of the results of an in-depth medical examination was carried out in the conditions of the professional center of the clinic of the Federal State Budgetary Scientific Institution VSIMEI. The level and structure of morbidity by the main classes of chronic diseases have been studied. Results. As a result of the analysis of the data of the periodic medical examination, the structural composition of nosological forms of diseases was presented as follows: diseases of the cardiovascular system - 10%, ophthalmological diseases - 5%, endocrinological diseases - 5%, diseases of ENT organs - 10%, practically healthy persons - 70%. The mercury levels were determined at zero values, with the exception of 4 samples, in which the mercury content in the studied urine samples did not exceed the permissible level established by WHO (10 μg / L), the mercury levels in hair samples did not exceed the biologically permissible level (0.0-2,0 μg/g). Conclusion. This study showed the importance of medical examinations using extended examination methods and the need to monitor the health status of liquidators, since the safety of the work carried out also depends on the quality of workers' health.


2021 ◽  
Vol 2 (4) ◽  
pp. 1-7
Author(s):  
Sri Wahyuni ◽  
Teguh Satria Amin ◽  
Nomi Noviani ◽  
Leni Handayani

Enzymes are natural products that play an important role in various industrial applications, from food processing to chemical products. One of the most widely used enzymes is amylase. Amylase is an enzyme that plays a role in starch hydrolysis. Amylolytic bacteria can be isolated in the digestive tract of fish. This is most bacteria that occupy the digestive tract have high activity. This study aims to obtain a potential isolate producing amylase bacteria whose activity can be determined through morphological characterization and activity test of enzyme-producing bacteria. The results obtained from this study were ten isolates with the potential to produce amylase enzymes, which were marked with a positive test after the addition of iodine.


Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 63
Author(s):  
Amir Masoud Parvanian ◽  
Nasrin Sadeghi ◽  
Ahmad Rafiee ◽  
Cameron J. Shearer ◽  
Mehdi Jafarian

CO2 reutilization processes contribute to the mitigation of CO2 as a potent greenhouse gas (GHG) through reusing and converting it into economically valuable chemical products including methanol, dimethyl ether, and methane. Solar thermochemical conversion and photochemical and electrochemical CO2 reduction processes are emerging technologies in which solar energy is utilized to provide the energy required for the endothermic dissociation of CO2. Owing to the surface-dependent nature of these technologies, their performance is significantly reliant on the solid reactant/catalyst accessible surface area. Solid porous structures either entirely made from the catalyst or used as a support for coating the catalyst/solid reactants can increase the number of active reaction sites and, thus, the kinetics of CO2 reutilization reactions. This paper reviews the principles and application of porous materials for CO2 reutilization pathways in solar thermochemical, photochemical, and electrochemical reduction technologies. Then, the state of the development of each technology is critically reviewed and evaluated with the focus on the use of porous materials. Finally, the research needs and challenges are presented to further advance the implementation of porous materials in the CO2 reutilization processes and the commercialization of the aforementioned technologies.


Sign in / Sign up

Export Citation Format

Share Document