Garlic Micro-propagation and Polyploidy Induction In Vitro by Colchicine

( Molla G. Hailu ),( Kahsay T. Mawcha ),( Sylvere Nshimiyimana ),( Sony Suharsono ) 한국육종학회 2021 Plant Breeding and Biotechnology Vol.9 No.1

In most garlic producing countries, the yield of local garlic varieties is low due to small size bulbs and limited production area. Garlic in vitro culture can be induced in Basal Dunstan Short (BDS) or Murashige and Skoog medium (MS) medium supplemented with 2,4-D and Kinetin or with 2,4-D (2,4-dichlorophenoxyacetic acid) and BAP (Benzylaminopurine) for better callus production, cell and shoot proliferation from callus. This review aimed to describe the effect of growth hormones, colchicine concentration, and immersion time for increasing ploidy level of garlic varieties for genetic variability. Colchicine is effective to induce the meristematic basal discs of garlic plants at a concentration of 0.25-0.5% and immersion time at 24, 36, and 48 hours in vitro. High concentration and longer duration of colchicine could reduce the survival rate, whereas low concentration with a longer duration of colchicine treatment results in a higher polyploidy induction rate. A high percentage of polyploidy induction occurs in high colchicine concentration and longest time duration, but it leads to a high percentage of dead plants. Ploidy induction of diploid garlic genome can be induced by treating garlic stem discs up to 0.75% colchicine. The application of colchicine at 0.5% treatment improved the genetic potential of garlic varieties in vitro, but a lower duplication rate at 0.75% due to higher toxicity. The application of colchicine increased the ploidy level and an increase in ploidy is expected to have a larger bulb size. Larger tuber size is expected to increase the overall tuber weight and total garlic production.

Anion-controlled sulfidation for decoration of graphene oxide with iron cobalt sulfide for rapid sonochemical dyes removal in the absence of light

Molla, Aniruddha,Li, Yuanyuan,Khandelwal, Mahima,Hur, Seung Hyun,Chung, Jin Suk Elsevier 2018 Applied Catalysis A Vol.561 No.-

<P><B>Abstract</B></P> <P>Anion-controlled sulfidation was used to decorate graphene oxide with iron cobalt sulfide via a simple hydrothermal reaction. Anion exchange was carried out using sodium sulfide as an exchanger without any templates or backbone architecture, and in an easy and economical way. Interchange of oxalate, chloride, and hydroxide anions with sulfide anions was performed to tune the morphology of the materials, which subsequently affected their surface area (48.64–83.52 m<SUP>2</SUP>/g) and band gap (2.45–2.91 eV). Ultrasonically-cavity-induced degradation activity without light was rapid (1–3 min) for both positive dyes (rhodamine B and methylene blue), a negative dye (methyl orange), and their mixture. Degradation of the dyes and their mixture in the presence of the prepared samples was a pseudo first-order reaction with rate constant value from 0.780 to 1.702 min<SUP>−1</SUP> that followed the sequence <B>FCS@GO-2 </B>> <B>FCS@GO-1</B> ∼ <B>FCS@GO-3</B> and MB > RhB > MO for catalyst and dyes, respectively. By using terephthalic acid, it was found that the sono-Fenton process quickly generated reactive oxygen species (ROS) even in absence of light. The ROS production was greater for <B>FCS@GO-2</B> than <B>FCS@GO-1</B> or <B>FCS@GO-3</B>, consistent with the catalytic activities of the different catalysts. The prompt production of ROS resulted in a very active process, and the presence of mixed valance states of iron and cobalt resulted in an effective and stable process. It is the synergistic effect of the catalyst that allowed effective breakdown of dyes even in absence of light. The auto-cleaning effect of sonication allowed reuse of the decorated graphene oxide for at least five cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Iron cobalt sulfide@GO was obtained via anion-controlled hydrothermal reaction. </LI> <LI> The band gap, morphology and surface area were tuned via anion exchange. </LI> <LI> The cavity induced sonochemical dyes degradation without light was rapid (1–3 min). </LI> <LI> Generation of ROS by sono-Fenton process was identified using terephthalic acid. </LI> <LI> Dyes degradation was quantitative and repetitive even after five cycles. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Using anion-controlled sulfidation, the morphology, surface area, and band gap (2.45–2.91 eV) of iron cobalt sulfide-decorated graphene oxide was tuned via a simple hydrothermal reaction and allowed for ultrasonic cavity-induced catalytic removal of organic dyes via a sono-Fenton process in the absence of light.</P> <P>[DISPLAY OMISSION]</P>

UNIQUENESS OF P(f) AND [P(f)](k) CONCERNING WEAKLY WEIGHTED SHARING

Molla Basir Ahamed 장전수학회 2022 Advanced Studies in Contemporary Mathematics Vol.32 No.2

In this paper, with the help of the idea of weakly weighted sharing introduced by Lin and Lin [Kodai Math. J. 29(2006), 269-280], we study the uniqueness of polynomial expression P(f) and its derivatives [P(f)](k) of meromorphic functions f sharing a small function. The main results in the paper significantly improved the result of Liu and Gu [Kodai Math. J. 27(3)(2004), 272-279]. This research work finds certain condition under which the polynomial P(f) is reduced to a non-zero monomial and consequently, the class of the function f is characterized. Examples have been exhibited to show that some conditions in the main results simply can not be removed and also some inequalities are sharp.

Monochromatic dual-emissive carbon nanodots for detection of Fe(Ⅲ) ion in aqueous media

Aniruddha Molla,Youngwon Ju,Joohoon Kim 한국분석과학회 2020 학술대회논문집 Vol.2020 No.6

Set shared by an Entire Function with its k-th Derivative Using Normal Families

Ahamed, Molla Basir Department of Mathematics 2020 Kyungpook mathematical journal Vol.60 No.2

In this paper, we study a problem of a non-constant entire function f that shares a set S = {a, b, c} with its k-th derivative f^(k), where a, b and c are any three distinct complex numbers. We have found a gap in the statement of the main result of Chang-Fang-Zalcman [10], and with the help of their method, we have generalize their result in a more compact form. As an application, we generalize the famous Brück conjecture [9] with the idea of set sharing.

Class of Meromorphic Functions Partially Shared Values with Their Differences or Shifts

Ahamed, Molla Basir Department of Mathematics 2021 Kyungpook mathematical journal Vol.61 No.4

For a value s ∈ ℂ∪ {∞}, two meromorphic functions f and g are said to share the value s, CM, (or IM), provided that f(z)-s and g(z)-s have the same set of zeros, counting multiplicities, (respectively, ignoring multiplicities). We say that a meromorphic function f shares s ∈ Ŝ partially with a meromorphic function g if E(s, f) ⊆ E(s, g). It is easy to see that "partially shared values CM" are more general than "shared values CM". With the help of partially shared values, in this paper, we prove some uniqueness results between a non-constant meromorphic function and its generalized differences or shifts. We exhibit some examples to show that the result of Charak et al. [8] is not true for k = 2 or k = 3. We find some gaps in proof of the result of Lin et al. [24]. We not only correct these resuts, but also generalize them in a more convenient way. We give a number of examples to validate certain claims of the main results of this paper and also to show that some of conditions are sharp. Finally, we pose some open questions for further investigation.

UNIQUENESS OF TWO DIFFERENTIAL POLYNOMIALS OF A MEROMORPHIC FUNCTION SHARING A SET

Ahamed, Molla Basir Korean Mathematical Society 2018 대한수학회논문집 Vol.33 No.4

In this paper, we are mainly devoted to find out the general meromorphic solution of some specific type of differential equation. We have also answered an open question posed by Banerjee-Chakraborty [4] by extending their results in a large extent. We have provided an example showing that the conclusion of the results of Zhang-Yang [16] is not general true. Some examples have been exhibited to show that certain claims are true in our main result. Finally some questions have been posed for the future research in this direction.

Buckling and delamination growth behavior of composite laminates with circular initial delamination

Abebaw Molla Endalew,우경식,In-Gul Kim,최동수,김화수 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.6

In this paper, the sub-laminate local buckling, global buckling and delamination propagation behavior of composite laminates with circular embedded delamination were studied numerically. First, linear buckling analyses were performed and buckling loads and modes of local sub-laminate and global buckling were identified. Next, geometrically nonlinear postbuckling and delamination propagation analyses were performed. Buckling deformation was instigated by seeding finite element meshes with a small amount of combined linear buckling modes. In-plane failure and interface delamination were accounted for by a continuum damage mechanics method and cohesive zone modeling, respectively. Analyses were performed to investigate the interaction between local sub-laminate buckling, global buckling, in-plane failure, and delamination propagation. The dependence of buckling behavior on the size and depth of location of pre-delamination was also investigated by a series of parametric studies.

Recent progress on electroanalytical sensing of small molecules and biomolecules using carbon dots: A review

Aniruddha Molla,육지호 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-

The carbon dot (CD) family has gained significant attention due to their tunable photoluminescence,physicochemical properties, low toxicity, high stability, chemical inertness, water solubility, and biocompatibility. These exceptional properties have increased their utilization in electroanalytical sensing applicationsfor various small molecules and biomolecules. Electroanalytical sensing methods are simpletechniques that detect or identify target analytes quantitatively or qualitatively by analyzing electrochemicalsignals such as current or potential in an electrochemical cell. These methods offer severaladvantages, including operational simplicity, cost-effectiveness, high accuracy, low detection limit, lessanalysis time, and reproducibility. This review presents a comprehensive summary of recent advancementsin the electroanalytical applications of CDs, with a particular focus on their role as sensors forsmall molecules and biomolecules. CDs are categorized into five subclasses based on their composition,functionality, and applicability. These include CDs with or without heteroatom doping, composite CDs,CDs complexed with metals, CDs doped or supported with metal nanoparticles, and polymersupportedCDs. The review elucidates the underlying principles of electrochemical signal generationand detection mechanisms associated with these molecules. Furthermore, it provides insight into thesynthetic pathways to prepare these CDs.

Driving Stability Evaluation of the Ethiopian Inter-City Train Locomotive under Crosswind Conditions by Modifications of Body Shape

Kibret Yilak Molla,JeongSeo Koo 한국도시철도학회 2021 한국도시철도학회논문집 Vol.9 No.4

The effect of the aerodynamic force acting on the vehicle by crosswind is one of the most critical problem for safety. Further development of the Ethiopian railway transport calls for the solution of existing problems among which aerodynamic effect is regarded most important. The modification design proved that the Ethiopian train needs aerodynamic effect improvement on the technical and economical performances of train leading vehicles. This study numerically evaluated the robustness of aerodynamic and dynamic driving stability effects on the Ethiopian inter-city train locomotive. The numerical tests have conducted under 12 m/s speed crosswind conditions at straight, and curved rail tracks independently. This case study has estimated and evaluated the comparison of driving stability in between the baseline and modified models at the maximum operational speed. This evaluation study proved that all the rotational moment values, which occur due to aerodynamic loads, are less than all resistance moment values, which do due to train payload reaction, on both models. Therefore, the existing and the modified models have been guaranteed to operate with in 160km/h at straight and 72km/h (20m/s) limit speed at curved rail track.