Sign In

Publication

Free Access Published Journals

Congratulations upon your paper being published.

1. Prof Ir Dr Suzana Yusup 

     David Onoja Patrick   

2. Prof Ir Dr Suzana Yusup 

     Dr Adilla Rashidi 

3. AP Dr. Anita Ramli 

4. Dr. Lam Man Kee

5. Dr. Lim Jun Wei

6. Dr. Muhammad Ayoub 

7. Dr. Yoke Wang Cheng 

2020 Publication

Q1

  • Inayat, A.,Inayat, M.,Shahbaz, M.,Sulaiman, S.A.,Raza, M.,Yusup, S.(2020) Parametric analysis and optimization for the catalytic air gasification of palm kernel shell using coal bottom ash as catalyst, Renewable EnergySiyal, A.A.,Shamsuddin,
  • M.R.,Low,A,Rabat, N.E.(2020) A review on recent development in the adsorption of surfactants from wastewater, Journal of Environmental Management
  • Salehuddin, N.F.,Mansor, N.,Yahya, W.Z.N,Noor Affendi, N.M.,Manogaran, M.D.(2020) Degradationof Allicin as Urease Inhibitor Affected by Soil Conditions and its Effect on Kinetic Properties of Soil Urease, Communication in Soil Science and Plant Analysis
  • Oh, W.D., Ng, C.Z.,Ng, S.L.,Lim, J.W.,Leong, K.-H.(2020) Rapid degradation of organics by peroxymonosulfate activated with ferric ions embedded in graphitic carbon nitride, Separation and Purification Technology.
2019 Publication

Book in Chapter

  • Choon Gek Khoo, Lam Man Kee, Keat Teong Lee (2019). Microscale and Macroscale Modelling of Microalgae Cultivation in Photobioreactor: A Review and Perspective. Advanced in Feedstock Conversion Technologies for Alternative Fuels and Bioproducts. Elsevier
  • e (2019). Scale up and Commercialization of Algae Cultivation and Biofuel Production. Biofuels from Algae 2nd Edition. Elsevier
  • Lam Man Kee. ACM Loy, Suzana Yusup, Keat Teong Lee (2019). Chapter 8: Biohydrogen Production From Alage. Biohydrogen 2nd Edition. Elsevier
  • Yoshimitsu Uemura (2019). Chapter 5 Section 2: Thermochemical Pretreatment. In Press. Corona Publishing Co. Ltd. Japan

Conference Proceeding

  •  Nanocomposite membrane for environmental remediation Publisher: University of Ottawa Press ISBN: 9780081019115; 978008102262

ion

  •  Lam Man Kee, Uganeeswary Suparmaniam, Jun Wei Lim (2019). Microalgae Bio-refinery: The Hidden Fuel Reap. Biorefinery - A  New Vision for Biomass. Biorefinery Sustainable Solution 

Q1

  • Farooq, M., Ramli, A., Naeem, A.,Khattak, N.S., Perveen, F.(2019) A green route for biodiesel production from waste cooking oil over base heterogeneous catalyst , International Journal of Energy Research
  • Ameen, M., Azizan, M.T., Ramli, A., Yusup, S., Alnarabiji, M.S.(2019) Catalytic hydrodeoxygenation of rubber seed oil over sonochemically synthesized Ni-Mo/γ-Al2 O3 catalyst for green diesel production, Ultrasonics Sonochemistry, 51, PP.90-102
  • Ameen, M., Azizan, M.T., Ramli, A., Yusup, S., Abdullah, B.(2019)The effect of metal loading over Ni/γ-Al 2 O 3 and Mo/γ-Al 2 O 3 catalysts on reaction routes of hydrodeoxygenation of rubber seed oil for green diesel production, Catalysis Today, Article in Press
  • Fong, M.J.B., Loy, A.C.M., Chin, B.L.F.,Yusup, S., Jawad, Z.A.(2019) Catalytic pyrolysis of Chlorella vulgaris: Kinetic and thermodynamic analysis, Bioresource Technology, 289
  • Dasan, Y.K., Lam, M.K., Yusup, S., Lim, J.W., Lee, K.T.(2019) Life cycle evaluation of microalgae biofuels production: Effect of cultivation system on energy, carbon emission and cost balance analysis, Science of the Total Environment, 688(20), pp. 112-128
  • Nguyen, T.T., Uemura, Y., Lam, M.K., Mansor, N., Lim, J.W.(2019) Revealing the effect of reaction parameters towards alkyl group distribution in in-situ transesterification of Chlorella vulgaris, Energy Conversion and Management, pp. 223-231
  • Loy, A.C.M., Quitain, A.T., Lam, M.K.,Sasaki, M., Kida, T.(2019) Development of high microwave-absorptive bifunctional graphene oxide-based catalyst for biodiesel production, Energy Conversion and Management, pp.1013-1025
  • Charles, A., Khan, M.R., Ng, K.H.,Witoon, T., Cheng, C.K.(2019)Facile synthesis of CaFe 2 O 4 for visible light driven treatment of polluting palm oil mill effluent: Photokinetic and scavenging study, Science of the Total Environment, 661, pp. 552-530
  • Rosli, S.-S., Lim, J.-W., Jumbri, K.,Cheng, C.-K., Kadir, W.-N.-A.(2019) Modeling to enhance attached microalgal biomass growth onto fluidized beds packed in nutrients-rich wastewater whilst simultaneously biofixing CO 2 into lipid for biodiesel production, Energy Conversion and Management, pp. 1-10
  • Oh, W.-D., Veksha, A., Chen, X.,Leong, K.-H., Lim, T.-T.(2019) Catalytically active nitrogen-doped porous carbon derived from biowastes for organics removal via peroxymonosulfate activation, Chemical Engineering Journal, pp.947-957
  • Chia, S.R., Chew, K.W., Show, P.L.,Ho, S.-H., Lim, J.W.(2019)Spirulina platensis based biorefinery for the production of value-added products for food and pharmaceutical applications, Bioresource Technology, 289
  • Lim, J.-W., Mohd-Noor, S.-N., Wong, C.-Y.,Jumbri, K., Ghani, N.A.(2019) Palatability of black soldier fly larvae in valorizing mixed waste coconut endosperm and soybean curd residue into larval lipid and protein sources, Journal of Environmental Management,231,pp.129-136
  • Ahmad, T., Danish, M., Kale, P.,Nizami, M., Ayoub, M.(2019) Optimization of process variables for biodiesel production by transesterification of flaxseed oil and produced biodiesel characterizations, Renewable Energy, pp.1272-1280
  • Chan, Y.H., Cheah, K.W., How, B.S.,Hong, B.H., Ngan, S.L.(2019)An overview of biomass thermochemical conversion technologies in Malaysia,Science of the Total Environment, 680, pp. 105-123
  • 81
  • Cheah, K.W., Taylor, M.J., Osatiashtiani, A., Bridgwater, A.V., Kyriakou, G.(2019)Monometallic and bimetallic catalysts based on Pd, Cu and Ni for hydrogen transfer deoxygenation of a prototypical fatty acid to diesel range hydrocarbons, Catalysis Today, Article in Press

Q2

  • Harun, N., Abidin, S.Z., Osazuwa, O.U., Taufiq-Yap, Y.H., Azizan, M.T.(2019) Hydrogen production from glycerol dry reforming over Ag-promoted Ni/Al 2 O 3, International Journal of Hydrogen Energy, pp. 213-225
  • Wong, C.-Y., Rosli, S.-S., Uemura, Y.,Lam, M.-K., Lim, J.-W.(2019) Potential protein and biodiesel sources from black soldier fly larvae: Insights of larval harvesting instar and fermented feeding medium, Energies, 12(8)en12081570
  • cheng y.w, ng. k.h, lam, s s, lim j.w, wongsakulphatch s, witoon, T., Cheng C.K(2019) syngas from catalytic steam reforming of palm oil mill effluent: an optimization study, International Journal of hydrogen energy, pp. 9920-9236
  • Tiong, L., Komiyama, M.(2019) Supercritical water gasification of microalga Chlorella vulgaris over supported Ru, Journal of Supercritical Fluids, 144, pp.1-7
  • Kueh, B.W.B., Yusup, S., Osman, N., Ramli, N.H.(2019 )Analysis of Melaleuca cajuputi extract as the potential herbicides for paddy weeds, Sustainable Chemistry and Pharmacy, 11, pp. 36-40
  • Chan, Y.H., Quitain, A.T., Yusup, S.,Sasaki, M., Kida, T.(2019) Liquefaction of palm kernel shell to bio-oil using sub- and supercritical water: An overall kinetic study, Journal of the Energy Institute, 92(3), pp. 535-541
  • Mahmood, H., Moniruzzaman, M., Iqbal, T.Rashid, M., Raza, A.(2019) Comparative effect of ionic liquids pretreatment on thermogravimetric kinetics of crude oil palm biomass for possible sustainable exploitation, Journal of Molecular Liquids, 282, pp.88-96
  • Shah, M.U.H., Moniruzzaman, M., Sivapragasam, M.,Yusup, S.B., Goto, M.(2019) A binary mixture of a biosurfactant and an ionic liquid surfactant as a green dispersant for oil spill remediation, Journal of Molecular Liquids, 280,pp. 111-119
  • Ramli, N.H., Yusup, S., Quitain, A.T., Johari, K., Kueh, B.W.B.(2019) Optimization of saponin extracts using microwave-assisted extraction as a sustainable biopesticide to reduce Pomacea canaliculata population in paddy cultivation, Sustainable Chemistry and Pharmacy, 11, pp. 23-35
  • Samsuri, S., Rizan, N.A.N., Hung, S.H., Amran, N.A., Sambudi, N.S.(2019) Progressive Freeze Concentration for Volume Reduction of Produced Water and Biodiesel Wastewater, Chemical Engineering and Technology, Article in Press
  • Mohd Arif, N.N., Abidin, S.Z., Osazuwa, O.U., Azizan, M.T., Taufiq-Yap, Y.H. (2019) Hydrogen production via CO2 dry reforming of glycerol over Re[sbnd]Ni/CaO catalysts , International Journal of Hydrogen Energy, 44(37), pp. 20857-20871
​2018 Publication

 Bo

ok

  • Nanocomposite membrane for environmental remediation Publisher: University of Ottawa Press ISBN: 9780081019115; 9780081022627 
Conference Proceeding
  • Effect of Preparation Method on Physicochemical Properties of Fe/Zeolite catalyst. Journal of Physics: Conference Series. 
  • Influence of Preparation Methods on Physicochemical Properties of Zirconia for Transesterification of Nanochloropsis Oculate. Journal of Physics: Conference Series.
  • One Pot Biodiesel Production from Wet Chlorella Vulgaris Using Supercritical; Methanol with Oxide. AIP Conference Proceedings.
  • Effect of NaNO3 and NaCl Concentration on Nanochloropsis Oculate Cell Biomass and FAME Composition for Biodiesel Production. Journal of Physics: Conference Series.
  • Preparation and Characterization of Ce-ZR/Al-MCM-41 Bimetallic Catalyst for Transesterification of Jatropha Oil to Biodiesel. IOP Conference Series: Earth and Environmental Science
Q1
​2017 Publication
Book Chapter
  • Atnaw S.M., Sulaiman S.A., Yusup S (2017). Biomass Gasification. Waste Biomass Management- a Holistic Approach. Springer International Publishing
  • Wan Nurain Farahah Wan Basri, Lim Jun Wei, Lam Man Kee, Chew Thiam Leng (2017). Point of Zero Charge and Size of Sugarcane Bagasse-derived Adsorbents to Enhance the Adsorption in Microalgae Biomass in Easing Harvesting Process.  Contemporary of Sciences: Physics, Chemistry and Mathematics. UTP Press
  • Hamayoun Mahmood, Muhammad Monirruzzaman, Suzana Yusup, Hazizan Md. Akil (2017). Green Composites from Ionic Liquid-Assisted Processing of Sustainable Resources:  A Brief Overview. Progress and Development in Ionic Liquids. InTechOpen
  • K.V.Sharma, Akilu Suleiman, Hj. Suhaimi B. Hassan, Gurumurthy Hegde (2017). Considerations on the Thermophysical Properties of Nanofluids. Engineering Applications of Nanotechnology: from Energy to Drug Delivery. Springer International Publishing
Conference Proceedings
  • Nur Adilla Rashidi, Suzana Yusup (2017). Production of Palm Kernel Shell-Based Activated Carbon by direct Physical Activation for Carbon Dioxide Adsorption. 2017 International Conference on The “Challenges in Environmental Science and Engineering” (CESE 2017)
  • Yi Herng Chan, Suzana Yusup, Armando Quitain, Yoshimitsu Uemura, Mitsuru Sasaki, Tetsuya Kida (2017). Hydrothermal Liquefaction of Palm Kernel Shell to Bio-Oil Under Sub and Supercritical Conditions: A Global Kinetic Study. 4th Postgraduate Colloquium for Environment Research (POCER) 2017
  • Chung Loong Yiin, Suzana Yusup, Armando Quitain, Yoshimitsu Uemura, Mitsuru Sasaki, Tetsuya Kida (2017). Low Transition Temperature Mixture (LTTM) Sustainable Green Solvent for Biomass Delignification. 7Th International Forum on Industrial Bioprocessing (IFIBIOP 2017)
  • Chung Loong Yiin, Suzana Yusup, Armando Quitain, Yoshimitsu Uemura, Mitsuru Sasaki, Tetsuya Kida (2017). Natural Hydro-Low Transition Temperature Mixture (NH-LTTM) as Sustainable Green Solvent for Biomass Delignification.6th International Seminar on Green Energy Conversion
  • Chung Loong Yiin, Suzana Yusup, Armando Quitain, Yoshimitsu Uemura, Mitsuru Sasaki, Tetsuya Kida (2017). Optimization of Microwave Hydrothermal Extraction of malic Acid from Cactus (Euphorbia Trigona) using Responses Surface Methodology. 4th Postgraduate Colloquium for Environment Research 2017
  • Patrick, D. O. Suzana Yusup, Noridah Osman, Zabiri, H., Shahbaz, M (2017). Performance of Water-Leached Coal Bottom Ash as Catalyst in Thermogravimetric Analyzer (TGA) Biomass Gasification. Chemical Engineering Transactions
  • Mariam Amee, Mohd Tazli Azizan, Suzana Yusup, Anita Ramli, Madiha Yasir (2017). Catalytic Hydrodeoxygenation of Triglycerides: An Approach to Clean Diesel Fuel Production. Renewable and Sustainable Energy Reviews
  • Mariam Amee, Mohd Tazli Azizan, Suzana Yusup, Anita Ramli (2017). Hydroprocessing of Rubber Seed Oil Over Ni-Moly-AL2O3 for the Green Diesel Production. 20th Conference on Process Integration Modelling and Optimization for Energy Saving and Pollution Reduction
  • Puteri Sarah diba Kamarulzaman, Suzana Yusup, Pradip Chandra Mandal, Rohani Salleh,Haryanni Harun, Lee Pei Ting, Noor Hafizah Ramli@Yusof (2017). Optimization of Supercritical CO2 Extraction of Essentia; Oil from Neem Leaves using Response Surface Methodology. 2nd International Conference on Agriculture, Aquaculture, Fisheries, and Animal Science (ICAAFAS 2016)
  • Noor Hafizah Ramli@Yusof, Suzana Yusup, Benjamin Wei Bin Kueh, Puteri Sarah Diba Kamarulzaman, Noridah Osman, Mardyahwati Abd. Rahim, Ramlan Aziz, Sulaiman Mokhtar, Abu Bakar Ahmad (2017). Effectiveness of Biopesticides in Enhancing Paddy Growth for Yield Improvememt. 2nd Green and Sustainable Chemistry
  • Noor Hafizah Ramli@Yusof, Suzana Yusup, Benjamin Wei Bin Kueh, Puteri Sarah Diba Kamarulzaman, Noridah Osman, Mardyahwati Abd. Rahim, Ramlan Aziz, Sulaiman Mokhtar, Abu Bakar Ahmad (2017). Effectiveness of Biopesticides Against Brown Planthopper (Nilaparvata Lugens) in Paddy Cultivation. 2nd Green and Sustainable Chemistry
  • Puteri Sarah Diba Kamarulzaman, Suzana Yusup, Noridah Osman, Benjamin Wei Bin Kueh, Noor Hafizah Ramli@Yusof, Raudah Talib (2017). Effectiveness of Neem Based Biopesticide to Enhance Rice (Oryza Sativa). 2nd Green and Sustainable Chemistry
  • Noor Hafizah Ramli@Yusof, Suzana Yusup, Mardyahwati Abd. Rahim, Khairiraihana Johari (2017). Selection of Potential Plants for Saponin Extract Using Superitical CO2 Extraction Against Golden Apple Snails (Pomacea Canaliculata) for Paddy Cultivation. 7th International Forum on Industrial Bioprocesses (IFIBIOP 2017)
  • Benjamin Wei Bin Kueh, Suzana Yusup, Noridah Osman (2017). Extraction of essential Oil from Leptospermum Flavescenes and Melaleuca Cajuputi Leaves for Herbicides Allopathy. 4th Postgraduate Colloquium for Environmental Research (POCER) 2017
  • Benjamin Wei Bin Kueh, Suzana Yusup, Noridah Osman (2017). Supercritical Extraction of Plants Bio-active Azadirachtin and Leptospermone using Carbon Dioxide. Joint International Symposium on regional Revitalization and Innovation for Social Contribution and E-Asia Function Material and Biomass Utilization 2016
  • Yee Ho Chai, Suzana Yusup, Wui Soon Chok, Sonny Irawan, Jespal Singh Deol Balbir Singh, Chin Bridgid Lai Fui (2017). Comparison of Rheological Properties of Graphene/Carbon Nanotube Hydrogenated Oil Based Biodegradable Drilling Fluid. 29th Symposium of Malaysian Chemical Engineers (SOMCHE) 2016
  • Yee Ho Chai, Suzana Yusup, Muhammad Syafiq Hazwan Ruslan, Yong Ling Gwee (2017). Supercritical Fluid Extraction Phytochemicals from Carica Papaya Leaves for Bio-Repellant Properties. 10th International Conference on Supercritical Fluids (Supergreen 2017) 
  • Wai Hong Leong, Jun Wei Lim, Yoshimitsu Uemura, Yeek Chia Ho (2017). Synergistic Co-Cultivation of Activated Sludge and Microalgae in Enhancing the Lipid Production and Biological. 6th International Seminar on Green Energy Conversion
Q1
​2016 Publication

Book Chapter

  • Dennis Ling, Anita Ramli, Beh Hoe Guan, Balbir Singh, Cecilia Devi Wilfred (2016). Synthesis of Furfural from Lignocellulosic Biomass using Heterogeneous catalyst – A Review. Contemporary of Sciences: Physics, Chemistry and Mathematics. UTP Press
  • Lim Jun Wei, Lam Man Kee, Chew Thiam Leng (2016). Potential Energy Generation from High Velocity Wind Produced from Air Conditioner Compressor Using Small Scale Wind Turbine. Contemporary of Sciences: Physics, Chemistry and Mathematics. UTP Press

Conference Proceedings

  • Waste Cooking Oil Biodiesel Via Hydrodynamic Cavitation on a Diesel Engine Performance and Greenhouse Gas Footprint Reduction. 2nd International Conference On Biomass (ICONBM 2016)
  • Nurliyana Masiran, Bawadi Abdullah, Dai-Viet N. Vo, Abdus Salam (2016). Improvement on Coke formation of CaO-Ni/Al2O3 Catalyst in Ethylene Production Via Dehydration of Ethanol. 4th International Conference on Process engineering and Advanced Materials
  • Yi Herng Chan, Suzana Yusup, Armando Quitain, Yoshimitsu Uemura, Mitsuru Sasaki, Tetsuya Kida (2016). Optimization of Hydrothermal Liquefaction of Palm Kernel Shell to Bio-Oil by response Surface Methodology and Synergistic Effect of Supercritical CO2. 2016 AIChE Annual Meeting
  • Chung Loong Yiin, Suzana Yusup, Armando Quitain, Yoshimitsu Uemura (2016). Natural Hydro-Low-Transition-Temperature Mixture (NH-LTTM) As Sustainable Green Solvent for Biomass Delignification. 5th International Solvothermal and Hydrothermal Association (ISHA 2016)
  • Chung Loong Yiin, Suzana Yusup, Armando Quitain, Yoshimitsu Uemura, Mitsuru Sasaki, Tetsuya Kida (2016). Sustainable Green Solvents from Natural Malic Acid from Plants and Fruits for the Synthesis of Low Transition Temperature Mixture (LTTMs). 29th International Symposium on Chemical Engineering (ISChE 2016)
  • Chung Loong Yiin, Suzana Yusup, Armando Quitain, Yoshimitsu Uemura, Mitsuru Sasaki, Tetsuya Kida (2016). Microwave-assisted Hydrothermal Extraction of Natural Malic Acid from Plants and Fruits for the Synthesis of Low Transition Temperature Mixture (LTTMs). Joint International Symposium on regional Revitalization and Innovation for Social Contribution and E-ASIA Functional Materials and Biomass Utilization 2016 
  • Chung Loong Yiin, Suzana Yusup, Armando Quitain, Yoshimitsu Uemura, Mitsuru Sasaki, Tetsuya Kida (2016). Natural Malic Acid Based Low-Transition-Temperature-Water Mixture as an Eco-Sustainable Green Solvent for Biomass Delignification. The 11th International Student Conference on Advanced Science and Technology (ICAST 2016)
  • Marsha Daeyana Shahrom, Nurlidia Mansor, Yuji Teramoto, Yoshimitsu Uemura (2016). Bio-monitoring of Heavy Metal Concentration at Areas Affected by the 2015 haze in Malaysia. SOJO-UTP
  • Tarvinthranath Puspalingam, Lam Man Kee. Yoshimitsu Uemura (2016). Semi-Continuous Cultivation of Microalgae using compost as Nutrient Source for Biomass and Lipid Production. SOJO-UTP
  • Ahmad Fadzil Ahmad Shuhaili, Suzana Yusup, Noridah Osman (2016). Cracking of Rubber Seed Oil (RSO) Over HAZSM-5 Catalyst. SOJO-UTP
  • Varsheta Sellappah, Yoshitmitsu Uemura, Suhaimi Hassan (2016). Comparison of Empty Fruit Bunch Torrefaction Behavior in the Presence of Combustion Gas, Inert and Non-Inert Carrier Gas. SOJO-UTP
  • Nur Enzati A. Ismail, Anita Ramli, Mohd F. Taha (2016). Preparation and Characterization Activated Carbon from rice Husk and Oil Palm Empty Fruit Bunches. SOJO-UTP
  • Trinh Thi Hoai Huong, Suzana Yusup, Yoshimitsu Uemura (2016). Activated Carbon Production from Palm Shell for carbon Dioxide Adsorption: Process Design and Evaluation. SOJO-UTP
  • Arya Hosseinipour, Azuraien Bt Japper-Jaafar, Suzana Yusup (2016). The Effect of CO2 on Wax Apperance Temperature of Crude Oils. 4th International Conference on Process Engineering and Advanced Materials
  • Arya Hosseinipour, Azuraien Bt Japper-Jaafar, Suzana Yusup (2016). Physicochemical Properties of Ni-Moly-AL2CO3 catalyst Synthesized Sonochemical Method. 4th International Conference on Process Engineering and Advanced Materials
  • Mariam Ameen, Mohd Tazli Azizan, Suzana Yusup, Anita Ramli, Madihah Yasir, Khadijah Ahmad Jais, Mohd Husainni Sa’aid (2016). Effects of Ultrasound Irradiation on Synthesis of Solid Acid catalysts. Key Engineering Materials 2016 Trans Tech Publications, Switzerland
  • Mariam Amee, Mpohd Tazli Azizan, Suzana Yusup, Anita Ramli, madiha Yasir (2016). Physcochemical Properties of Ni-Moly-Al2O3 catalysts Synthesized Via Sonochemical Method. 4th International Conference on Process Engineering and Advanced Materials
  • Mohd Tazli Azizan, Khadijah Ahmad Jais Mohd Husainni, Sa’aid,Mariam Ameen, Suzana Yusup, Anita Ramli, Madiha Yasir (2016). Thermodynamic Equilibrium Analysis of Triolein Hydrodeoxygenation for Green Diesel Production. 4th International Conference on Process Engineering and Advanced Material
  • Nga T.T. Tran, Yoshimitsu Uemura, Anita Ramli (2016). Hydrodeoxygenation of Guaiacol Over Al-MCM-41 Supported Metal Catalysts: A comparative Study of Co and Ni. 4th International Conference on Process Engineering and Advanced Materials
  • Nga T.T. Tran, Yoshimitsu Uemura, Anita Ramli (2016). Vapor-Phase Hydrodeoxygentaion of Guaiacol on Bimetallic PdMe/Al-MCM-41.Te 20th Annual Green Chemistry & engineering Conference (GC&E 2016)

Q1