OOIR: Observatory of International Research

Papers

(The TQCC of Journal of the Chinese Chemical Society is 3. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-12-01 to 2025-12-01.)

Article	Citations
Preview: Journal of the Chinese Chemical Society 5/2023	54
Electrocatalytic properties of MoS₂ synthesized using molybdenum foam for hydrogen evolution reaction	52
A fluorescent aptasensor based on MoSe₂ nanosheets and exonuclease III‐assisted signal amplification for sensitive detection of ZEN	37
Pyrite (FeS₂)‐decorated 1D TiO₂ nanotubes in a bilayer as a sustainable photoanode for photoelectrochemical water splitting activity	35
Rational self‐assembly of heterobimetallic lantern‐shaped cages from benzofuran‐derived pyridine and terpyridine ligands	34
Synthesis of unsymmetric azahelicenes through oxidative cyclodehydrogenation of N‐bridged π‐conjugated molecules	31
Issue Information: Journal of the Chinese Chemical Society 9/2022	26
Simulated insights into regulated ESDPT behavior for the oxygen elements substituted 3,7‐dihydroxy‐4‐oxo‐2‐phenyl‐chroman‐6‐carbaldehyde derivatives	26
Modification of copper surface with palladium/platinum via galvanic displacement in ionic liquid for enhancing electrochemical nitrate reduction activities	25
Synergistic micrometer flower bloom: Quercetin electrochemical sensing platform constructed from CuO‐C/NiCo₂O₄ composite material	24
Molecularly imprinted polyaniline‐modified electrode for quantitative detection of acetaminophen	22
Excited‐state nonadiabatic dynamics simulations on the heptazine and adenine in a water environment: A mini review	21
The capture of carbonyl sulfide by N‐methyldiethanolamine: A systematic density functional theory investigation	21
Simple Evaluation of Singlet Fission Couplings for Interacting Dimer Systems	20
Enantioselective Michael addition using 4(3H)‐pyrimidinone	19
Non‐enzymatic hydrogen peroxide sensor based on palladium‐decorated poly(thionine) modified glassy carbon electrode	18
Spider‐egg‐like structured α‐MnO₂ as an efficient cathode material for aqueous rechargeable zinc‐ion batteries	18
	17
Inhibitive impact of Terfeziaceae plant extract on nitric acid decomposition of copper	17
Contents: Journal of the Chinese Chemical Society 6/2022	17
Fused thiophene based materials for organic thin‐film transistors	17
	16
Preview: Journal of the Chinese Chemical Society 6/2022	16
Retraction	15
Influence of dysprosium substitution on the properties of cobalt‐zinc ferrite nanoparticles: Structural, magnetic, and dielectric perspectives	15

Cover: Journal of the Chinese Chemical Society 05/2024	15
Synthesis, computer‐aided ADMET prediction, and molecular docking of novel 3,5,6‐trichloropyridin‐2‐yl derivatives as potential antimicrobial agents	14
Encapsulation of vortioxetine with cyclodextrins via host–guest inclusion complex: Synthesis, characterization, solubility, and in vitro dissolution studies	14
Formulation, nanonisation, and characterization of Polyrhachis sp. for enhanced anticancer potential: In vitro studies	14
Sequence‐dependent clustering properties of nucleotides fragments in an ionic solution	14
Effective cyanide ions detection using neutral red receptor: Spectroscopic, colorimetric detection and theoretical deformation density analysis	14
Isomeric differentiation of bile acids using three‐dimensional MS² spectrum	14
	13
Characterizing the excited states of large photoactive systems by exciton models	13
Effects of amino‐ and dimethylamine‐groups on the fluorescent properties of novel flavone‐based derivatives with ESIPT behavior: A TD‐DFT study	13
Molecular docking and molecular dynamics studies of Glu‐Glu‐Arg, Glu‐Pro‐Arg, and Pro‐Arg‐Pro tripeptides to reveal their anticancer and antiviral potentials	13
Rational truncation, mutation, and halogenation of bradykinin neuropeptides as potent ACEII inhibitors by integrating molecular dynamics simulations, quantum mechanics calculations, and in	12
Cover: Journal of the Chinese Chemical Society 10/2025	12
Optimal control for maximally creating and maintaining a superposition state of a two‐level system under the influence of Markovian decoherence	12
Light‐induced NO release from iron‐nitrosyl‐thiolato complex: The role of noncovalent thiol/thioether	12
Inverse design of ligands using a deep generative model semi‐supervised by a data‐driven ligand field strength metric	11
Ultrathin atomic layer deposition Al₂O₃ coatings on graphite cathode materials for improving anti‐self‐discharging Al‐ion battery	11
An amino trimethylene phosphonic acid‐based chelated boric acid complex that works as a synergistic flame retardant for enhancing the flame retardancy of cotton fabrics	11
Detection mechanism and solvent effects of the 3‐hydroxy‐2‐(4‐(pyrrolidin‐1‐yl)phenyl)benzo[g]quinolin‐4(1H)‐one (PBQ) probe	11
Preparation of a fluorescent composite coating and its anticorrosive and indicative performance	11
Synthesis and characterization of boehmite/metal – Organic framework of type AlO(OH)/MOF‐74(Zn) for photocatalytic degradation of Congo red dye	11
Unlocking the potential of carbon quantum dots: Versatile photocatalysts for methylene blue degradation—A comprehensive review of synthesis, catalytic mechanisms, and environmental applications	11
Personal perspective on the work of Edith J. Chu and Jui Hsin Wang, and their influence on my research of the heme‐O₂ complex and heme d₁	10
Preview: Journal of the Chinese Chemical Society 1/2023	10
DOS strategy, crystal structure, and in silico evaluation of the anti‐inflammatory activity of hydroxysulfanylazole derivatives	10
Cellulose nanofibrils derived from pulp as a high performance separator for lithium‐ion batteries	10
	10
	10
A sensitive and stable electrochemical immunosensor for glycocholic acid in serum detection based on MoS₂ and MWCNTs composites	9
Cover: Journal of the Chinese Chemical Society 10/2022	9
Improved hydrogen evolution efficiency in water splitting with WO₃ thin film via physical vapor deposition	9
Preview: Journal of the Chinese Chemical Society 10/2024	9
Contents: Journal of the Chinese Chemical Society 11/2023	9
Construction of magnetically separated quantum dot fluorescent aptasensor and its application in MUC1 detection	9
Integrating synthesis, enzyme inhibition and in silico studies: Carbamoyl luteolin derivatives targeting Alzheimer's disease	9
Improvement on electrochemiluminescence properties of graphite carbon nitride by metal oxidation state regulation	9
Cover: Journal of the Chinese Chemical Society 12/2021	9
Preview: Journal of the Chinese Chemical Society 9/2025	9
Retraction	9
Synthesis, design, and antimicrobial activity of pyrido[2,3‐d][1,2,4]triazolo[4,3‐a]pyrimidinones based on quinoline derivatives	8
Preview: Journal of the Chinese Chemical Society 11/2025	8
Designing extrinsic porosity in supramolecular organic frameworks: Structural control with giant tetrahedral molecules	8
Density functional theory study on sensing properties of g‐C₃N₄ sheet to atmospheric gasses: Role of zigzag and armchair edges	8
Cover: Journal of the Chinese Chemical Society 11/2022	8
Tuning the emission of copper nanoclusters through bimetallic systems: A comprehensive review on enhanced luminescence for functional ink applications	8
Cover: Journal of the Chinese Chemical Society 01/2024	8
Benzotrifuran based organic molecules for optoelectronic and charge transport properties for organic electronic devices	8
Electrochemical detection of chloramphenicol in feed and soil matrices using SPCE‐N‐GQD sensors for on‐site screening applications	7
Progress on the preparation of biomass porous carbon and its application in functional textiles	7
Theoretical study on the aggregation‐induced emission mechanism of anthryl‐tetraphenylethene	7

Structure determination and magnetic studies of triazole chelated Co(II) coordination polymers	7
Developing tyrosine phosphoproteome libraries and dual quantification using a hybrid DIA approach	7
Contents and Masthead: Journal of the Chinese Chemical Society 12/2024	7
Electrochemical properties depending on heteroatom and surface property of various carbon sources/NiO composites as supercapacitor electrode	7
Issue Information: Journal of the Chinese Chemical Society 12/2022	7
Fluorescein isothiocyanate‐tagged boronic acid sensor‐based pH‐dependent discerning tannic acid detection	7
Ratiometric fluorescence sensor for protamine and heparin based on N,P‐doped carbon dots and Eosin Y	7
A simple uric acid assay by using 3‐hydroxytyramine as a chromogenic colorimetric sensor in human serum samples: Density functional theory supported mechanistic approach	7
Perovskite materials advance the potent sensor exploration	7
Green electrosynthesis strategies of SnO catalysts for enhanced photodegradation of 2,4‐dichlorophenol	7
Photocatalytic efficiency of sol–gel synthesized Mn‐doped TiO₂ nanoparticles for degradation of brilliant green dye and mixture of dyes	7
Chitosan nanogels‐mediated AIE self‐assembly of copper nanoclusters for highly sensitive detection of the anticancer drug methotrexate	7
Fabrication of superhydrophobic CoFe₂O₄/polyaniline/covalent organic frameworks/cotton fabric membrane and evaluation of its efficiency in separation of olive oil from	7
Methoxy‐substituted triphenylamines served as a core to design innovative, cost‐effective hole transport materials essential for the development of efficient perovskite solar cells	7
The effects of the lattice modulation on the intermolecular motions of the MA cations of the tetragonal MAPbI₃ phase	7
Preview: Journal of the Chinese Chemical Society 12/2023	7
Preview: Journal of the Chinese Chemical Society 01/2025	7
	7
Production of hydrochar from corn silk by hydrothermal carbonization technique and its modification for more effective removal of Cr(VI)	7
ESIPT mechanism of the HPQRB fluorescent probe and its ratiometric detection of SO₂	7
	6
Novel Cu₂O/Bi₂WO₆ composite for the photoreduction of CO₂ to fuel	6
Structural characterization of iron azadiethylthiolate complexes: Insights from NMR, crystallography, and ion mobility‐mass spectroscopy	6
Predictive potential of K‐Banhatti and Zagreb type molecular descriptors in structure–property relationship analysis of some novel drug molecules	6
Retraction	6
Facile one‐pot synthesis of PEG‐derived carbon dots with enhanced luminescence via L‐cysteine‐assisted S,N‐doping	6
Palladium‐catalyzed vinylation of cyclohexenes using a directing‐group strategy	6
Contents: Journal of the Chinese Chemical Society 1/2022	6
Carbon‐mixed aluminum hydroxide catalyst for the hydrogen generation of aluminum–water reaction	6
Contents: Journal of the Chinese Chemical Society 2/2023	6
Electronic properties of 3dtransition metal dihalide monolayers predicted byDFTmethods: Is there a pattern or are the results random?	6
Photodissociation dynamics of acetaldehyde at 267 nm: A computational study of the CO‐forming channels	6
New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb²⁺ and Cd²⁺ ions	6
Retraction	6
A review on photocatalytic degradation of aromatic organoarsenic compounds in aqueous environment using nanomaterials	5
Recent progress in the preparation of theaflavins: “Synthesis, extraction and purification”	5
Synthesis and structural characterization of monomeric aluminum keto‐imine complexes: Catalytic activity toward CO₂/styrene oxide coupling and ε‐caprolactone ring opening polymer	5
Cover: Journal of the Chinese Chemical Society 6/2022	5
Preview: Journal of the Chinese Chemical Society 4/2022	5
Geometric, spintronic, and opto‐electronic properties of 3d transition metals doped silicene: An ab initio study	5
Polarization effects on intermolecular vibrational energy transfer analyzed by 2DIR spectroscopy	5
Anaerobic photocyclization of ortho‐dialkylamino substituted stiff‐stilbenes	5
Special issue in memory of Prof. King‐Chuen Lin	5
	5
Engineered metal nanoparticles for precision drug delivery: Pioneering the future of medicine: Mini review	5
Quantum‐chemical modeling of polypyrrole structure in neutral complexes with electron density acceptors	5
Correlated driving‐and‐dissipation equation for non‐Condon spectroscopy with the Herzberg–Teller vibronic coupling	5
Further investigation of conjugated length and dispersity on light‐driven hydrogen evolution facilitated by conjugated polymers	5
Cover: Journal of the Chinese Chemical Society 5/2023	5
Cover: Journal of the Chinese Chemical Society 04/2025	5
Study on the effects of beta cyclodextrin‐zinc oxide nanoparticles as heterogeneous catalysts in microbial oil fermentation	5
Glycolipids of monogalactosyldiacylglycerol in Phalaenopsis leaves during growth and spike induction periods form mixed liposomes that enhance the inhibition of Escherichia coli growth	5
Special Issue: Frontier Precise Measurement	5
Cover: Journal of the Chinese Chemical Society 11/2025	5
Theoretical exploration on excited state behaviors for 2‐(1H‐benzo[d]imidazole‐2‐yl)‐6‐(benzo[d]‐thiazol‐2‐yl)‐4‐bromophenol in nonpolar and polar solvents	5
One‐pot synthesis of CuO/TiO₂ nanocomposites for improved photocatalytic hydrogenation of 4‐nitrophenol to 4‐aminophenol under direct	5
Structure, charge density, and Hirshfeld surface analysis of proton transfer complex 2‐amino‐4‐methylpyridinium 2‐(3‐methylphenyl)‐acetate	5
Contents: Journal of the Chinese Chemical Society 11/2022	5
Heavy metal‐free electrochemical detection of pyrophosphate ions by Nafion/carbon dots decorated screen printed carbon electrodes	5
Issue Information: Journal of the Chinese Chemical Society 1/2023	5
Using click reaction to covalently link heterogeneous gold nanorods into head‐to‐head one‐dimensional chains with an alternating sequence as plasmonic Fano resonators	5
Preview: Journal of the Chinese Chemical Society 9/2023	5
Research of the anharmonic effect on the main reactions related to NH₃, NH₂, and NH	4
Recent advances in nano‐architecture materials for the photocatalytic degradation of organic sunscreen chemical water pollutants	4
MAXTOF: An efficient calculation tool for precise optimization of MALDI‐TOF MS measurements in real time	4
Impression of fused chalcogens (O, S, and Se) with acene molecules on optical and charge transport properties: A theoretical study	4
Glycidol‐modified polyethylenimine‐capped carbon dots with ultrastable fluorescence for sensitive and selective detection of folic acid in food samples	4
Ligand‐assisted imprinting‐probe‐labeling strategy reveals Siglec‐7 ‐ glycoprotein interactions	4
Theoretical insights into photo‐induced behaviors associated solvent polarity effects for HDMTP fluorophore: A TDDFT study	4
Collaborative control of branching ratio in the O + HO₂ → OH + O₂ reaction via vibrational and rotational excitation	4
Studies on a novel microporous electrospun poly(vinyl alcohol)‐based polymer electrolyte membranes for high‐performance battery applications	4
Silver nanoparticle‐infused hydrogels for biomedical applications: A comprehensive review	4
Effect of S doping on structural and photoelectrochemical properties of LaFeO₃ nanocomposites	4
Highly selective chromogenic and fluorogenic probe based on benzothiazole‐thiosemicarbazone Schiff base for detection of copper (II) in real samples	4
Retraction	4
	4
Enhanced luminescence using the core‐shell‐shell structure of 3‐mercaptopropionic acid‐capped ZnSe/ZnS: Mn/ZnS quantum dot	4
Contents and Masthead: Journal of the Chinese Chemical Society 01/2025	4
The highly efficient protein crystallography beamline TLS 13B1 at the National Synchrotron Radiation Research Center	4
Single‐molecule tethered particle motion to study protein‐DNA interaction	4

Contents: Journal of the Chinese Chemical Society 12/2023	4
	4
Convenient synthesis of 8‐aryl‐6‐aryl‐1,2,3,4‐tetrahydroisoquinoline‐5,7‐dicarbonitriles via a cascade Michael/cyclization reaction	4
Contents: Journal of the Chinese Chemical Society 3/2023	4
Investigation of two dimensional‐MoS₂/reduced graphene oxide electrode for applications of NO_x gas sensors	4
Theoretical study of the functional characteristics of composite fiber/colorant materials for military digital camouflage	4
Extraction of genomic DNA from wild boar (Sus scrofa) muscle tissue using hydrophobic magnetic deep eutectic solvents	4
Synthesis and molecular modeling of new 2‐benzylidenethiobarbituric acid derivatives as potent tyrosinase inhibitors agents	4
Loading thionine onto MXene enhances electron transfer and ultrasensitive electrochemical detection of H₂O₂	4
DFT investigation on thermoelectric, electronic, optoelectronic, elastic, and structural properties of sodium‐based halide double perovskites Rb₂NaSbZ₆ (	4
Corrosion resistance of amorphous AlPO₄ coating in salty atmospheres	4
Design, synthesis, and evaluation of 1,2,3‐triazole‐based benzenesulfonamide and flavonol hybrid molecules as anticancer agents	4
	4
Noncognate HER2 sensitivity to cognate EGFR allosteric inhibitors at molecular level: New uses for old drugs in gynecological tumors	4
Cover: Journal of the Chinese Chemical Society 06/2024	4
Editorial	4
Synthesis, photophysical properties, and DFT calculation of yellow‐red phosphorescent iridium(III) complexes based on thiophen‐pyrimidine/pyridine derivatives	4
Nitazoxanide and azithromycin for the early treatment of COVID‐19: A multi‐spectroscopic, biochemical and computational drug–drug interaction study	4
Synthesis and performance evaluation of chitosan/zinc oxide nanocomposite as a highly efficient adsorbent in the removal of reactive red 198 from water	4
Controlled synthesis of aliphatic polycarbonate diols using dimethyl carbonate and various diols	4
Synthesis of low‐cost microporous activated carbon adsorbents for CO₂ capture from Palmyra palm fruit shell waste biomass	4
Supramolecular assembly and solvochromic luminescence of a Au(I) complex containing di(4‐pyridylmethyl)aminedithiocarbamate	4
Cover: Journal of the Chinese Chemical Society 2/2022	4
Aβ₄₂ oligomers can seed the fibrillization of Aβ₄₀ peptides	3
Issue Information: Journal of the Chinese Chemical Society 4/2022	3
Synthesis, structural, and stereogenic characterizations of new trispirocyclotriphosphazenes	3
Construction of BiOBr/Bi₂WO₆ S‐scheme heterojunction photocatalyst for enhanced photocatalytic degradation for tetracycline removal	3
Investigation of excited‐state intramolecular proton transfer (ESIPT) properties in dye compounds with 2‐(2′‐hydroxybenzofuran)benzoxazole (HBBO) core structure	3
A DFT‐based study of the hydrogen‐bonding interactions between epicatechin and methanol/water	3
Retraction	3
Synthesis and characterization of Co₃O₄ nanoparticles: Application as performing anode in Li‐ion batteries	3
Cover: Journal of the Chinese Chemical Society 6/2023	3
Side‐chain engineering of benzimidazole‐incorporated A‐DA'D‐A type acceptors for organic solar cells and field‐effect transistors	3
Next‐generation anti‐counterfeit security using carbon nanodots: Tunable luminescence and sustainable ink design—A review	3
Determined Ag⁺ and Hg²⁺ by ethylenediamine perovskite or ethylenediamine perovskite/graphene oxide composite modified glassy carbon electrodes	3
Role of cobalt precursors in the synthesis of Co₃O₄ hierarchical nanostructures toward the development of cobalt‐based functional electrocatalysts for bifunctional wat	3
Preview: Journal of the Chinese Chemical Society 01/2024	3
Preparation and characterization of Schiff base nickel complexes and their application in the coupling reaction of cyclohexene oxide and carbon dioxide	3
Electrospun PMMA fibers blended with core‐shell PCM/PS microspheres for thermal regulating applications	3
A strategically designed fluorescent turn‐on chemodosimeter for selective detection of mercury (II) via dithioacetal deprotection reaction	3
Targeting peptide‐mediated interaction between the N‐protein and P‐protein of human pediatric respiratory syncytial virus by molecular design of chemically stapled helical peptides	3
Structural studies of silica‐supported spinel magnesium ferrite nanorods for photocatalytic degradation of methyl orange	3
Adsorption‐photocatalysis for methylene blue dye removal by novel Fe‐MOFs through defect engineering	3
In silico insights into dual COX inhibition by fluoro‐substituted indole derivative using DFT, molecular docking, and MD simulation studies	3
PtZn@CN/CC derived from ZIF–86 for high‐performance hydrogen evolution in acid and alkaline electrolyte	3
A density functional theory study of van der Waals interaction in carbon nanotubes	3
Contents and Masthead: Journal of the Chinese Chemical Society 9/2025	3
Supramolecular assemblies of organogelators featuring benzimidazole and long‐chain pyridine dicarboxyamide	3
Retraction	3
Cover: Journal of the Chinese Chemical Society 4/2022	3
Covalent organic frameworks and metal–organic frameworks for sustainable adsorptive removal/extraction of dirty dozen chemicals: A review	3
Black phosphorene‐poly‐lysine nanocomposites‐based horseradish peroxidase biosensor for sensitive electrochemical detection of sodium nitrite	3
Waste bamboo‐derived biochar and multiporous carbon as adsorbents for methyl orange removal	3
High thermoelectric figure of merit in rhombic porous carbon nitride nanoribbons	3
Theoretical studies on excited‐state properties and luminescence mechanism of a Carbene–Metal–Amide Au(I) complex with thermally activated delayed fluorescence	3
Design of TiO₂/ZIF‐8 heterojunction with enhanced visible‐light photocatalytic activity under mild conditions	3
Azadirachta indica assisted green synthesis of magnetic Ag/GO‐Fe₃O₄ nanocomposites for the solid‐phase extraction of tetracyclines from milk	3
Vibrational spectrum of a 1D oscillator: The quantum, the Wigner, and the classical ways	3
Cover: Journal of the Chinese Chemical Society 1/2023	3
Novel fluorescent probe based on dicoumarin for detection of hydrogen sulfide in real samples	3
Tannic acid as a chemosensor for colorimetric detection of Fe(II) and Au(III) ions in environmental water samples	3
Polyoxometalates for carbon dioxide activation: Current progress and perspective	3
	3
Effects of oxidant molecules on the thermal decomposition of 4,7‐diaminopyridazino[4,5‐c]furanoxane crystal: Ab initio molecular dynamics simulations	3
Recent applications of atomic spectroscopy coupled with magnetic solid‐phase extraction techniques for heavy metal determination in environmental samples: A review	3
Triethanolamine‐modified montmorillonite clay as a new adsorbent for CO₂ capture: Characterization, adsorption, and RSM modeling	3
	3
A new synthetic route for the preparation of 2,2′,5′‐trimethyl‐7‐oxo‐4,7‐dihydro‐[6,7′‐bipyrazolo[1,5‐a]pyrimidine]‐3,3′‐dicarbonitrile, structural elucidation, Hirshfeld surface analysis, ener	3
Contents and Masthead: Journal of the Chinese Chemical Society 03/2024	3
	3
Morphological‐dependent charge transfer at WO ₃ /	3
Cover: Journal of the Chinese Chemical Society 3/2022	3
Structures, photoluminescence, and magnetism of 1D lanthanide coordination polymers dominated on 3,5‐dichlorobenzoate	3
Preview: Journal of the Chinese Chemical Society 11/2022	3
Influential effect of C^N ligands containing O, S, and Se heteroatoms in the color tuning of four phosphorescent Ir(III) complexes	3
Preview: Journal of the Chinese Chemical Society 09/2024	3
Mechanism of five flavonoids inhibiting NtMGAM based on molecular simulations	3
	3
Optical, thermal, and magnetic properties of a microporous fluorinated iron phosphate: (H₃O)₂[Fe₄(H₂O)₂F₄	3
Issue Information: Journal of the Chinese Chemical Society 12/2021	3
Contents: Journal of the Chinese Chemical Society 6/2023	3
Application of high‐performance liquid chromatography‐solid phase extraction‐nuclear magnetic resonance in the identification of bioactive constituents from Hyptis spicigera leaf and	3
Fullerene (C₆₀)‐doped zinc‐aluminium layered double hydroxide/polyvinyl alcohol nanocomposites: Synthesis, characterization, and photodegradation of methylene blue from water sol	3
HPLC fingerprint profiles of lucidenic acids from Ganoderma lucidum (lingzhi)	3
Computational studies on the excited state decay rates in aggregates of two‐coordinate Cu (I) complexes: Thermally Activated Delayed Fluorescence and Aggregation Induced Emi	3
Membrane proteomic profiling enhances drug target detection	3
Analysis of the electronic nature and transport properties of Co₂CrGe, Co₂FeGe, and Co₂NiGa by computational electronic structure calc	3