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  1. Article ; Online: Meiosis at three loci in autotetraploids: Probabilities of gamete modes and genotypes without and with preferential cross-over formation.

    Griswold, Cortland K / Asif, Saira

    Heredity

    2023  Volume 130, Issue 4, Page(s) 223–235

    Abstract: A long-standing goal in the field of polyploid biology has been the derivation of mathematical models of gamete mode formation. These models form the basis of statistical inference and evolutionary theory. Here, we present 3-locus models of gamete mode ... ...

    Abstract A long-standing goal in the field of polyploid biology has been the derivation of mathematical models of gamete mode formation. These models form the basis of statistical inference and evolutionary theory. Here, we present 3-locus models of gamete mode formation in autotetraploids without and with preferential cross-over formation. The three loci are assumed to occur on one arm of the same chromosome. For preferential cross-over formation, one of the three loci affects the tendency for sets of sister chromatids to pair and therefore affects rates of recombination. The models are derived such that the process of double reduction is a function of rates of synaptic partner switches and recombination, as opposed to being independent of these processes. We assume potentially one synaptic partner switch per meiosis. We also assume the coefficient of coincidence is one, such that cross-over events are independent, given a set of cross-over rates. Illustrative cases are examined demonstrating differences in the gamete mode probabilities without and with preferential cross-over formation. Lastly, we explore the accuracy of maximum likelihood estimates of the probability of synaptic partner switches and preferential cross-over formation when the locus controlling preference is at a proximal, middle, or distal location on the chromosome arm. All Supplementary Information is available at https://github.com/ckgriswold/3-locus-autotetraploid-meiosis .
    MeSH term(s) Humans ; Likelihood Functions ; Polyploidy ; Genotype ; Meiosis ; Germ Cells
    Language English
    Publishing date 2023-02-04
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2423-5
    ISSN 1365-2540 ; 0018-067X
    ISSN (online) 1365-2540
    ISSN 0018-067X
    DOI 10.1038/s41437-023-00595-9
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  2. Article ; Online: Methyl esters synthesis from Luffa cylindrica seeds oil using green copper oxide nanoparticle catalyst in membrane reactor

    Alsaiari, Mabkhoot / Dawood, Sumreen / Ahmad, Mushtaq / Alsaiari, Raiedhah A. / Rizk, Moustafa A. / Asif, Saira

    Chemosphere. 2023 Oct., v. 338 p.139349-

    2023  

    Abstract: This study investigates the potential role of Juglans sp. root extract-mediated copper oxide nanoparticles of Luffa cylindrica seed oil (LCSO) into methyl esters. The synthesized green nanoparticle was characterized by Energy-dispersive X-ray ... ...

    Abstract This study investigates the potential role of Juglans sp. root extract-mediated copper oxide nanoparticles of Luffa cylindrica seed oil (LCSO) into methyl esters. The synthesized green nanoparticle was characterized by Energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), and Scanning electron microscopy (SEM) spectroscopies to find out the crystalline size (40 nm), surface morphology (rod shape), particle size (80–85 nm), and chemical composition (Cu = 80.25% & O = 19.75%), accordingly. The optimized protocol for the transesterification reaction was adjusted as oil to methanol molar ratio (1:7), copper oxide nano-catalyst concentration (0.2 wt %), and temperature (90 °C) corresponding to the maximum methyl esters yield of 95%. The synthesized methyl esters were characterized by GC-MS, ¹H NMR, ¹³C NMR, and FT-IR studies to know and identify the chemical composition of newly synthesized Lufa biodiesel. The fuel properties of Luffa cylindrica seed oil biofuel were checked and compared with the American Biodiesel standards (ASTM) (D6751-10). Finally, it is commendable to use biodiesel made from wild, uncultivated, and non-edible Lufa cylindrica to promote and adopt a cleaner and sustainable energy method. The acceptance and implementation of the green energy method may result in favourable environmental effects, which in turn may lead to better societal and economic development.
    Keywords Fourier transform infrared spectroscopy ; Juglans ; Luffa aegyptiaca ; X-ray diffraction ; biodiesel ; chemical composition ; cupric oxide ; economic development ; electron microscopy ; energy-dispersive X-ray analysis ; methanol ; nanocatalysts ; nanoparticles ; particle size ; seed oils ; temperature ; transesterification ; Energy crop ; Luffa cylindrica ; Non-edible seed oil ; LCSOB ; Green Cu–O nanoparticle ; Membrane
    Language English
    Dates of publication 2023-10
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2023.139349
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  3. Article ; Online: Methyl esters synthesis from Luffa cylindrica seeds oil using green copper oxide nanoparticle catalyst in membrane reactor.

    Alsaiari, Mabkhoot / Dawood, Sumreen / Ahmad, Mushtaq / Alsaiari, Raiedhah A / Rizk, Moustafa A / Asif, Saira

    Chemosphere

    2023  Volume 338, Page(s) 139349

    Abstract: This study investigates the potential role of Juglans sp. root extract-mediated copper oxide nanoparticles of Luffa cylindrica seed oil (LCSO) into methyl esters. The synthesized green nanoparticle was characterized by Energy-dispersive X-ray ... ...

    Abstract This study investigates the potential role of Juglans sp. root extract-mediated copper oxide nanoparticles of Luffa cylindrica seed oil (LCSO) into methyl esters. The synthesized green nanoparticle was characterized by Energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), and Scanning electron microscopy (SEM) spectroscopies to find out the crystalline size (40 nm), surface morphology (rod shape), particle size (80-85 nm), and chemical composition (Cu = 80.25% & O = 19.75%), accordingly. The optimized protocol for the transesterification reaction was adjusted as oil to methanol molar ratio (1:7), copper oxide nano-catalyst concentration (0.2 wt %), and temperature (90 °C) corresponding to the maximum methyl esters yield of 95%. The synthesized methyl esters were characterized by GC-MS,
    MeSH term(s) Esters ; Copper ; Luffa ; Plant Oils/chemistry ; Biofuels/analysis ; Spectroscopy, Fourier Transform Infrared ; Esterification ; Nanoparticles ; Oxides ; Catalysis
    Chemical Substances Esters ; cuprous oxide (T8BEA5064F) ; Copper (789U1901C5) ; Plant Oils ; Biofuels ; Oxides
    Language English
    Publishing date 2023-06-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2023.139349
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  4. Article ; Online: Membrane reactor for production of biodiesel from nonedible seed oil of Trachyspermum ammi using heterogenous green nanocatalyst of manganese oxide

    Rozina / Ahmad, Mushtaq / Iqbāl, Muḥammad Z̤afar / Bokhari, Awais / Akhtar, Muhammad Saeed / Alshgari, Razan A. / Karami, Abdulnasser Mahmoud / Asif, Saira

    Chemosphere. 2023 Feb. 07, p.138078-

    2023  , Page(s) 138078–

    Abstract: Conventional homogeneous-based catalyzed transesterification for the production of biodiesel can be replaced with a membrane reactor that has an immobilized heterogeneous catalyst. Combining reaction with separation while utilizing membranes with a ... ...

    Abstract Conventional homogeneous-based catalyzed transesterification for the production of biodiesel can be replaced with a membrane reactor that has an immobilized heterogeneous catalyst. Combining reaction with separation while utilizing membranes with a certain pore size might boost conversion process. this investigation to study the effectiveness of membrane reactor in combination with heterogeneous green nano catalysis of MnO₂. Techniques such as XRD, EDX, FTIR, SEM, and TGA were used to characterize the synthesized MnO₂ nano catalyst. The highest conversion of around 94% Trachyspermum ammi oil was obtained by MnO₂. The optimum process variables for maximum conversion were catalyst loading of 0.26 (wt.%), 8:1 M ratio, 90 °C reaction temperature, and time 120 min. The green nano catalyst of MnO₂ was reusable up to five cycles with minimum loss in conversion rate of about 75% in the fifth cycle. Nuclear magnetic resonance validated the synthesis of methyl esters. It was concluded that membrane reactor a promising technique to efficiently transesterify triglycerides into methyl esters and enable process intensification uses MnO₂ as a catalyst.
    Keywords Trachyspermum ammi ; biodiesel ; catalytic activity ; manganese monoxide ; nanocatalysts ; nuclear magnetic resonance spectroscopy ; porosity ; seed oils ; temperature ; transesterification ; Membrane reactor ; Trachyspermum ammi oil ; Nanoparticles ; Manganese oxide
    Language English
    Dates of publication 2023-0207
    Publishing place Elsevier Ltd
    Document type Article ; Online
    Note Pre-press version
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2023.138078
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  5. Article: Deciphering the Role of Plant-Derived Smoke Solution in Ameliorating Saline Stress and Improving Physiological, Biochemical, and Growth Responses of Wheat

    Shabir, Sumera / Ilyas, Noshin / Asif, Saira / Iqbal, Muhammad / Kanwal, Sidra / Ali, Zeshan

    Journal of plant growth regulation. 2022 Oct., v. 41, no. 7

    2022  

    Abstract: Plant-derived smoke (PDS) is an emerging area of interest for research in plant growth during stress conditions. Two wheat varieties (NARC 2011 and NARC 2009) were imbibed in different dilutions of PDS solution and were subjected to salinity (50 mM and ... ...

    Abstract Plant-derived smoke (PDS) is an emerging area of interest for research in plant growth during stress conditions. Two wheat varieties (NARC 2011 and NARC 2009) were imbibed in different dilutions of PDS solution and were subjected to salinity (50 mM and 100 mM NaCl). Among all three concentrations (1:100, 1:250, and 1:500), the PDS solution 1:500 has shown improvement in germination, morphological, physiological, and biochemical attributes. It has shown an increase in germination percentage by 48.9% and 27.7% at 50 mM and 100 mM salinity, respectively. Similar results were observed among plant physiological attributes (i.e., relative water content, leaf water potential, leaf osmotic potential, membrane stability index, leaf chlorophyll contents, ionic contents) and biochemical parameters (i.e., proline contents, free amino acid, soluble sugar, protein contents). Among antioxidants enzyme assay, superoxide dismutase activity has shown a reduction of 14.02% and 10.5% at 50 mM and 100 mM NaCl, respectively, by application of PDS solution (1:500 conc.). Compound 1 isolated as a result of repeated column chromatography was light brown and its name [1,4-dihydroxybenzene (hydroquinone)] was confirmed by mass spectrometry. Results have shown that lower concentrations (10 ppm and 25 ppm) exhibited more stimulatory effects on seed germination. In light of our findings, it can be suggested that PDS has shown positive and stimulatory effects on wheat variety NARC 2011 under stress conditions. Moreover, it can be used as an alternative to phytohormones in the coming future.
    Keywords chlorophyll ; chromatography ; free amino acids ; hydroquinone ; leaf water potential ; leaves ; mass spectrometry ; osmotic pressure ; plant growth ; plant hormones ; proline ; salinity ; salt stress ; seed germination ; smoke ; sugars ; superoxide dismutase ; water content ; wheat
    Language English
    Dates of publication 2022-10
    Size p. 2769-2786.
    Publishing place Springer US
    Document type Article
    ZDB-ID 586787-3
    ISSN 1435-8107 ; 0721-7595
    ISSN (online) 1435-8107
    ISSN 0721-7595
    DOI 10.1007/s00344-021-10473-5
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  6. Article ; Online: Hazardous waste management (Buxus papillosa) investment for the prosperity of environment and circular economy: Response surface methodology-based simulation.

    Faiz, Ikram / Ahmad, Mushtaq / Ramadan, Mohamed Fawzy / Zia, Ulfat / Rozina / Bokhari, Awais / Asif, Saira / Pieroni, Andrea / Zahmatkesh, Sasan / Ni, Bing-Jie

    Journal of environmental management

    2023  Volume 350, Page(s) 119567

    Abstract: Dealing with the current defaults of environmental toxicity, heating, waste management, and economic crises, exploration of novel non-edible, toxic, and waste feedstock for renewable biodiesel synthesis is the need of the hour. The present study is ... ...

    Abstract Dealing with the current defaults of environmental toxicity, heating, waste management, and economic crises, exploration of novel non-edible, toxic, and waste feedstock for renewable biodiesel synthesis is the need of the hour. The present study is concerned with Buxus papillosa with seeds oil concentration (45% w/w), a promising biodiesel feedstock encountering environmental defaults and waste management; in addition, this research performed simulation based-response surface methodology (RSM) for Buxus papillosa bio-diesel. Synthesis and application of novel Phyto-nanocatalyst bimetallic oxide with Buxus papillosa fruit capsule aqueous extract was advantageous during transesterification. Characterization of sodium/potassium oxide Phyto-nanocatalyst confirmed 23.5 nm nano-size and enhanced catalytic activity. Other characterizing tools are FTIR, DRS, XRD, Zeta potential, SEM, and EDX. Methyl ester formation was authenticated by FTIR, GC-MS, and NMR. A maximum 97% yield was obtained at optimized conditions i.e., methanol ratio to oil (8:1), catalyst amount (0.37 wt%), reaction duration (180 min), and temperature of 80 °C. The reusability of novel sodium/potassium oxide was checked for six reactions. Buxus papillosa fuel properties were within the international restrictions of fuel. The sulphur content of 0.00090% signified the environmental remedial nature of Buxus papillosa methyl esters and it is a highly recommendable species for biodiesel production at large scale due to a t huge number of seeds production and vast distribution.
    MeSH term(s) Buxus ; Hazardous Waste ; Biofuels/analysis ; Esters ; Catalysis ; Waste Management ; Sodium ; Plant Oils
    Chemical Substances potassium oxide (58D606078H) ; Hazardous Waste ; Biofuels ; sodium oxide (3075U8R23D) ; Esters ; Sodium (9NEZ333N27) ; Plant Oils
    Language English
    Publishing date 2023-11-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.119567
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  7. Article ; Online: Membrane reactor for production of biodiesel from nonedible seed oil of Trachyspermum ammi using heterogenous green nanocatalyst of manganese oxide.

    Rozina / Ahmad, Mushtaq / Zafar, Muhammad / Bokhari, Awais / Akhtar, Muhammad Saeed / Alshgari, Razan A / Karami, Abdulnasser Mahmoud / Asif, Saira

    Chemosphere

    2023  Volume 322, Page(s) 138078

    Abstract: Conventional homogeneous-based catalyzed transesterification for the production of biodiesel can be replaced with a membrane reactor that has an immobilized heterogeneous catalyst. Combining reaction with separation while utilizing membranes with a ... ...

    Abstract Conventional homogeneous-based catalyzed transesterification for the production of biodiesel can be replaced with a membrane reactor that has an immobilized heterogeneous catalyst. Combining reaction with separation while utilizing membranes with a certain pore size might boost conversion process. this investigation to study the effectiveness of membrane reactor in combination with heterogeneous green nano catalysis of MnO
    MeSH term(s) Oxides ; Manganese Compounds ; Biofuels ; Ammi ; Esterification ; Esters ; Plant Oils
    Chemical Substances manganese oxide (64J2OA7MH3) ; Oxides ; Manganese Compounds ; Biofuels ; Esters ; Plant Oils
    Language English
    Publishing date 2023-02-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2023.138078
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  8. Article: Transition metal oxide-based membranes for oxygen separation

    Hou, Jianfeng / Shen, Zhangfeng / Tan, Xihan / Ali, Tarik E. / Assiri, Mohammed A. / Asif, Saira / Han, Ning

    Chemosphere. 2022 Dec., v. 308

    2022  

    Abstract: Tonnage oxygen production is still mostly based on the traditional technology of cryogenic distillation, a century-old, capital- and energy-intensive method. It is critical to create a novel low-cost, energy-efficient approach that can meet the growing ... ...

    Abstract Tonnage oxygen production is still mostly based on the traditional technology of cryogenic distillation, a century-old, capital- and energy-intensive method. It is critical to create a novel low-cost, energy-efficient approach that can meet the growing demand for oxygen in industry from the clean environmental or energy standpoint. Ruddlesden-Popper (RP) perovskite like oxides -based ionic transport membranes for the oxygen transport have recently been developed as a possible replacement for the traditional cryogenic approach. In this work, we detailly reviewed the progress of RP perovskite oxides based membranes for oxygen transport from separation mechanism, material types, synthesis methods to the final separation performance. This work advances the development of RP perovskite membranes for oxygen transport.
    Keywords distillation ; energy efficiency ; industry ; oxygen ; oxygen production ; traditional technology
    Language English
    Dates of publication 2022-12
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2022.136272
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  9. Article: Impact of economic capabilities and population agglomeration on PM2.5 emission: empirical evidence from sub-Saharan African countries

    Malik, Summaira / Iqbal, Asim / Imran, Asma / Usman, Muhammad / Nadeem, Muhammad / Asif, Saira / Bokhari, Awais

    Environmental science and pollution research. 2021 July, v. 28, no. 26

    2021  

    Abstract: The utilization of economic capabilities to raise production in the economy enhances the industrial activities and use of transportation. These activities deteriorate the quality of the environment and raise the level of particulate matter (PM₂.₅). The ... ...

    Abstract The utilization of economic capabilities to raise production in the economy enhances the industrial activities and use of transportation. These activities deteriorate the quality of the environment and raise the level of particulate matter (PM₂.₅). The objective of this study is to investigate the impact of economic capabilities and population agglomeration on PM₂.₅ emissions for the sample of 23 sub-Saharan African countries—a highly polluted region of the world. The study used panel regression from 2007 to 2015 and found that production capabilities are highly significant and directly effecting PM₂.₅ emissions. The Kuznets hypothesis does not hold in this region, and the concentration of population in urban areas is also significant. To avoid the problem of possible endogeneity in the empirical model and for robustness check, the study also utilized system GMM and found consistent results. The findings of the study are highly valuable to reduce PM₂.₅ and propose that the policymakers in Sub-Saharan African countries should opt for industrial specialization rather than economic complexity and ensure that the proper measures are taken to control PM₂.₅. Moreover, population concentrations should not be taken place in a few main urban cities.
    Keywords empirical models ; particulates ; pollution ; research ; transportation ; Sub-Saharan Africa
    Language English
    Dates of publication 2021-07
    Size p. 34017-34026.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-020-10907-9
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  10. Article ; Online: A review on properties, challenges and commercial aspects of eco-friendly biolubricants productions.

    Ahmad, Uzair / Naqvi, Salman Raza / Ali, Imtiaz / Naqvi, Muhammad / Asif, Saira / Bokhari, Awais / Juchelková, Dagmar / Klemeš, Jiří Jaromír

    Chemosphere

    2022  Volume 309, Issue Pt 1, Page(s) 136622

    Abstract: Lubricants operate as antifriction media, preserving machine reliability, facilitating smooth operation, and reducing the likelihood of frequent breakdowns. The petroleum-based reserves are decreasing globally, leading to price increases and raising ... ...

    Abstract Lubricants operate as antifriction media, preserving machine reliability, facilitating smooth operation, and reducing the likelihood of frequent breakdowns. The petroleum-based reserves are decreasing globally, leading to price increases and raising concerns about environmental degradation. The researchers are concentrating their efforts on developing and commercializing an environmentally friendly lubricant produced from renewable resources. Biolubricants derived from nonedible vegetable oils are environmentally favorable because of their non-toxicity, biodegradability, and close to net zero greenhouse gas emissions. The demand for bio lubricants in industry and other sectors is increasing due to their non-toxic, renewable, and environmentally friendly nature. Good lubrication, anti-corrosion, and high flammability are characteristic properties of vegetable oils due to their unique structure. This study presents several key properties of nonedible oils that are used to produce lubricants via the transesterification process. Bibliometric analysis is also performed, which provides us with a better understanding of previous studies related to the production of bio lubricants from the transesterification process. Only 371 published documents in the Scopus database were found to relate to the production of bio lubricants using the transesterification process. The published work was mostly dominated by research articles (286; 77.088%). Significant development can be seen in recent years, with the highest occurrence in 2021, reaching 68 publications accounting for 18.38% of the total documents. In the second step, (i) the authors with the most number of publications; (ii) journals with the most productions; (iii) most productive countries; and (iv) the authors' most frequently used keywords were evaluated. These results will provide a pathway for researchers interested in this field. Lastly, recommendation is made on research gaps to device possible strategies for its commercialization.
    MeSH term(s) Greenhouse Gases ; Reproducibility of Results ; Lubricants/chemistry ; Petroleum ; Plant Oils
    Chemical Substances Greenhouse Gases ; Lubricants ; Petroleum ; Plant Oils
    Language English
    Publishing date 2022-09-28
    Publishing country England
    Document type Review ; Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2022.136622
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