Organic Chemistry, Chemistry, Agronomy and Crop Science, Chemical Engineering
8
Scopus Publications
Scopus Publications
Influence of Powdered Lignocellulose from Alfalfa Straw and Its Carboxymethylated Derivative on the Properties of Water-Swelling Rubbers Abdirakym Nakyp, Elena Cherezova, Yulia Karaseva, Nurgali Akylbekov, Rakhymzhan Turmanov, Akbota Kuandykova Polysaccharides, 2026 The present work investigates the effect of powdered lignocellulose from alfalfa straw obtained by a chemo-extrusion method, as well as its carboxymethylated derivative, on the physicomechanical properties and swelling behavior of vulcanizates based on nitrile butadiene rubber (NBR, BNKS-28 AMN grade). Carboxymethylation of lignocellulose was performed using microwave activation. The functional group composition of the modified lignocellulose was characterized by Fourier-transform infrared (FTIR) spectroscopy, which confirmed successful carboxymethylation and revealed a reduction in crystallinity. Thermogravimetric analysis (TGA) was used to determine the thermal stability of the swelling carboxymethylated fillers. The degree of crystallinity of the carboxymethylated swelling fillers was evaluated by X-ray diffraction (XRD). It was shown that the introduction of powdered lignocellulose and its carboxymethylated derivative into the rubber compounds lead to an increase in compound viscosity and prolong the optimum cure time, while having no effect on the scorch time, in a manner similar to that observed for the commercial product sodium carboxymethylcellulose (NaCMC). It has been shown that the introduction of powdered lignocellulose and its carboxymethylated derivative increases the tensile strength of the rubber and improves its resistance to the action of mineralized water compared with the samples containing NaCMC. It was also demonstrated that carboxymethylated lignocellulose exhibits enhanced sorption capacity comparable to that of NaCMC. Overall, carboxymethylation of lignocellulose derived from alfalfa straw significantly improves the stability and sorption characteristics of nitrile butadiene rubber composites. These findings indicate that carboxymethylated lignocellulose is a sustainable and effective alternative to industrial NaCMC for use as a functional filler in elastomeric materials.
Application of N-(1-ethynylcyclohexyl)amide of O,O-diethyl-phosphoric acid as a growth stimulant for vegetable crops A. B. Kuandykova, B. Zh. Dzhiembaev, B. M. Diyarova, N. O. Akimbayeva, N. A. Zhumanova Brazilian Journal of Biology, 2025 This paper examines the effect of N-(1-ethynylcyclohexyl)amide O,O-diethylphosphoric acid (BA-4) on seed germination, growth and yield of the agricultural crops (carrot, beetroot, potato). As a result, seed germination in the concentrations of 0.001 and 0.0001% of BA-4 has increased by 7.0 and 19.0%, compared to the control. The results of the laboratory studies have shown that the treatment of with the BA-4 (0.0001% solution) has increased the seed germination energy by 11.0 and 17.0%, respectively. The HAU standard (0.06%) has increased the germination energy by 9.0% and germination by 10.0%. The results of the laboratory studies have shown that the use of BA-4 for treating the tubers has increased the number of awakened buds by 43.0% (0.001%) and 60.0% (0.0001%), compared to the control. When using BA-4 in the concentration of 0.001%, the carrot yield has increased by 3.5 t/ha or 15.9%, and in the concentration of 0.0001% - by 5.0 t/ha or 22.7%. When beetroot seeds were treated with the BA-4 preparation at a 0.0001% concentration, the yield increase compared to the control was 6.3 t/ha or 24.2%. The potato yield has increased from the use of BA-4 in concentration of 0.001% by 4.3 t/ha or 18.9%, compared to the control; in the concentration of 0.0001% - by 7.3 t/ha or 32.2%. The achieved results of increasing the yield of BA-4 are an effective stimulation of plant growth and development, contribute to an increase in the yield and ensure the compliance with the agricultural crop indicators.
Dynamics of germination of vegetable seeds when using dimethyl (1-hydroxy-1-phenylethyl) phosphanate as an accelerator Gaukhar Baitasheva, Aitzhamal Mussina, Galiya Medeuova, Akbota Kuandykova, Elmira Imanova, et al. Caspian Journal of Environmental Sciences, 2024 This study examines the effects of dimethyl (1-hydroxy-1-phenylethyl) phosphonate as a germination accelerator on various vegetable seeds. Seed germination is a critical phase in plant growth, significantly influencing crop yield and quality. The primary objective was to determine the compound's efficacy in enhancing germination rates and vigor by monitoring key indicators such as germination percentage, speed, and seedling development. A range of concentrations was tested to identify optimal dosages and effects. Results indicated that dimethyl (1-hydroxy-1-phenylethyl) phosphonate, at specific concentrations, significantly improved germination speed and uniformity, with enhanced early growth metrics compared to untreated controls. The findings suggest that this compound may be an effective germination promoter in agricultural applications, potentially reducing germination time and improving crop establishment under diverse conditions.
A Comprehensive Review of New Generation Plant Growth Regulators Nurgul Zhumanova, , Nazgul Akimbayeva, Nurbala Myrzakhmetova, Bolat Dzhiembaev, Akbota Kuandykova, Banu Diyarova, Olzhas Seilkhanov, Kazhmukhan Kishibayev, Amangeldi Меldeshov, Indira Saparbekova, Ainur Yerezhepova, , , , , , , , , , and Es Food and Agroforestry, 2024 This review article provides an in-depth exploration of the emerging field of New Generation Plant Growth Regulators (PGRs) and their potential applications in agriculture.As advancements in plant science continue to unfold, a wave of novel PGRs has emerged, promising innovative approaches to enhance crop productivity, quality, and resilience to environmental stressors.Through a comprehensive synthesis of recent literature, this review elucidates the diverse classes of New Generation PGRs, spanning synthetic compounds, microbial-based formulations, and naturally-derived substances.The article highlights the molecular mechanisms underpinning the action of these regulators, shedding light on their role in modulating plant growth, development, and responses to biotic and abiotic stresses.Moreover, this review evaluates the economic feasibility and environmental sustainability of adopting New Generation PGRs, considering their potential to optimize resource use, reduce environmental impact, and meet the demands of modern, sustainable agriculture.This comprehensive overview aims to guide researchers, agronomists, and industry professionals in understanding the evolving landscape of New Generation PGRs, offering insights into their transformative potential for the future of plant growth regulation and crop management.
Synthesis of New Symmetrical Diamidophosphates Based on meta-Phenylenediamine under Microwave Irradiation A. B. Kuandykova, B. Zh. Dzhiembaev, A. R. Burilov, N. I. Akylbekov, E. A. Chugunova, A. B. Dobrynin, G. M. Abyzbekova Russian Journal of General Chemistry, 2023 Abstract A new series of diphosphorylated amidophosphates was obtained as a result of the reaction of meta-phenylenediamine with dialkyl phosphites in the presence of CCl4 and triethylamine (Atherton–Todd reaction) under microwave irradiation. Structure of all the obtained amidophosphates was established on the basis of 31P, 1H, 13C NMR, IR spectroscopy and mass spectrometry methods, as well as single crystal X-ray diffraction and elemental analysis data.
Synthesis of Amidophosphates Based on 1-Ethynyl-1-Aminocyclohexane Upon Microwave Activation and their Biological Activity B.J. Dzhiembaev, A.B. Kuandykova, N.I. Akylbekov, A. Dobrynin, A.R. Burilov Eurasian Chemico Technological Journal, 2023 The researches for developing the methods for synthesizing new functionally substituted derivatives of alicyclic dialkylamidophosphates, establishing their structure, and searching for promising biologically active compounds in their series, are modern and relevant. The given study aimed to develop the synthesis of amidophosphates based on the example of phosphorylation of 1-ethynyl-1- aminocyclohexane with dialkyl phosphites in the presence of triethylamine in carbon tetrachloride in the Atherton-Todd reaction conditions using microwave irradiation of the reaction mixture. The reaction of 1-ethynyl-1-aminocyclohexane with dialkyl phosphites was carried out in a CCl4 excess at an equimolar ratio of reagents, triethylamine was used as an HCl acceptor. The highest yields of dialkyl- N-(1-ethynylcyclohexan-1-yl)amidophosphates were achieved by adding equimolar amounts of dialkyl phosphites to the mixture of 1-ethynyl-1-aminocyclohexane, triethylamine, and CCl4 followed by the subsequent activation of the mixture in a microwave reactor (MAS-II Plus MW) (MW 102 W, 115 °C, microwave irradiation time was 3‒5 min). The composition and structure of the obtained compounds were proved by elemental analysis, IR, 1H, 13C, 31P NMR spectroscopy, and X-ray diffraction analysis (XRD). The biological tests carried out in laboratory and field conditions allowed identifying diethyl-N-(1-ethynylcyclohexan-1-yl) amidophosphate among the synthesized compounds, which produces a high growth-regulating effect on the growth, development, and yield of agricultural crops.
Synthesis of New α-Aminophosphonates Based on Cyclohexylamine A. V. Smolobochkin, A. S. Gazizov, K. A. Doszhanova, A. B. Kuandykova, B. Zh. Jiyembayev, A. R. Burilov, M. A. Pudovik, R. A. Cherkasov Russian Journal of General Chemistry, 2020 A series of new α-aminophosphonates was synthesized based on the acid-catalyzed Kabachnik–Fields reaction involving diethyl phosphite, cyclohexylamine and substituted benzaldehyde. Structure of the reaction products was established by IR, NMR spectroscopy, and mass spectrometry methods.
