cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Istadi
Contact Email
istadi@che.undip.ac.id
Phone
+6281316426342
Journal Mail Official
bcrec@live.undip.ac.id
Editorial Address
Editorial Office of Bulletin of Chemical Reaction Engineering & Catalysis Laboratory of Plasma-Catalysis (R3.5), UPT Laboratorium Terpadu, Universitas Diponegoro Jl. Prof. Soedarto, Semarang, Central Java, Indonesia 50275
Location
Kota semarang,
Jawa tengah
INDONESIA
Bulletin of Chemical Reaction Engineering & Catalysis
Published by Masyarakat Katalis Indonesia - Indonesian Catalyst Society
ISSN : -     EISSN : 19782993     DOI : https://doi.org/10.9767/bcrec
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Bulletin of Chemical Reaction Engineering & Catalysis, a reputable international journal, provides a forum for publishing the novel technologies related to the catalyst, catalysis, chemical reactor, kinetics, and chemical reaction engineering. Scientific articles dealing with the following topics in chemical reaction engineering, catalysis science, and engineering, catalyst preparation method and characterization, novel innovation of chemical reactor, kinetic studies, etc. are particularly welcome. However, articles concerned on the general chemical engineering process are not covered and out of the scope of this journal. This journal encompasses Original Research Articles, Review Articles (only selected/invited authors), and Short Communications, including: fundamentals of catalyst and catalysis; materials and nano-materials for catalyst; chemistry of catalyst and catalysis; surface chemistry of catalyst; applied catalysis; applied bio-catalysis; applied chemical reaction engineering; catalyst regeneration; catalyst deactivation; photocatalyst and photocatalysis; electrocatalysis for fuel cell application; applied bio-reactor; membrane bioreactor; fundamentals of chemical reaction engineering; kinetics studies of chemical reaction engineering; chemical reactor design (not process parameter optimization); enzymatic catalytic reaction (not process parameter optimization); kinetic studies of enzymatic reaction (not process parameter optimization); the industrial practice of catalyst; the industrial practice of chemical reactor engineering; application of plasma technology in catalysis and chemical reactor; and advanced technology for chemical reactors design. However, articles concerned about the "General Chemical Engineering Process" are not covered and out of the scope of this journal.
Arjuna Subject : Teknik Kimia (semua kategori) - Katalisis
Articles 838 Documents
 54   55   56   57   58 
The Impact of Hydrogen Peroxide as An Oxidant for Solvent-free Liquid Phase Oxidation of Benzyl Alcohol using Au-Pd Supported Carbon and Titanium Catalysts Sarhan Sanaa Tareq; Mohd. Izham Saiman; Taufiq-Yap Yun Hin; Abdul Halim Abdullah; Umer Rashid
Bulletin of Chemical Reaction Engineering & Catalysis 2018: BCREC Volume 13 Issue 2 Year 2018 (August 2018)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.13.2.1204.373-385

Abstract

The solvent free oxidation of benzyl alcohol was conducted employing Au and Pd supported catalysts, while utilizing hydrogen peroxide 35% (H2O2) as the oxidant, H2O2 is  very cheap, mild, and an environment friendly reagent, which produced water as the only by-product. Various proportions of Au-Pd catalysts on carbon and titanium oxide activated as supports were synthesized through the use of sol immobilization catalyst synthesis technique. Characterization of the synthesized catalysts was performed using X-Ray Diffraction (XRD), Brunauer-Emmett-Teller (BET), Field Emission Scanning Electron Microscopy (FESEM), and Transmission Electron Microscopy (TEM). It was found that the synthesized Au-Pd/ activated carbon catalyst was  beneficial for the solvent free oxidation of benzyl alcohol after its containing high surface area measuring 871 m2g-1. Analysis of the TEM data and particle dimension revealed smaller and narrower particle size of 1 wt%. Thus, the distribution of Au-Pd/C was attained. Carbon-supported bimetallic catalysts presented a higher conversion compared to catalysts that are supported titanium oxide (TiO2) for for the oxidation reaction of benzyl alcohol. It was determined that this technique was a suitable process for catalyst synthesis with high selectivity, same distribution of the particle size and activations. 
Electrochemical Processes for the Formation of Hydroxyapatite Powders Adrian Nur; Heru Setyawan; Arief Widjaja; I. Wuled Lenggoro
Bulletin of Chemical Reaction Engineering & Catalysis 2014: BCREC Volume 9 Issue 3 Year 2014 (December 2014)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.9.3.6686.168-175

Abstract

Electrochemical synthesis of hydroxyapatite particles was performed from a homogeneous solution of Na2H2EDTA.2H2O, KH2PO4 and CaCl2 without stirring to investigate the mechanism of hydroxyapa-tite formation. We found that OH- ions generated by water reduction at the cathode play an important role in the formation of hydroxyapatite particles. The OH- ions induce the liberation of Ca2+ ions and the dissociation of phosphoric acid, which serve as the reactants for the formation of hydroxyapatite particles. Two layers with a clear boundary were formed during electrolysis. The upper layer comprises the produced particles and the lower layer is a homogeneous solution. The produced particles were held in the region between the electrodes mainly due to the electrostatic interactions of charged particles in an electric field. The hydroxyapatite particles are agglomerates consisting of spherical particles. Aging the suspension for 24 h after electrolysis leads to the transformation of hydroxyapatite to brushite. Thus, if producing hydroxyapatite is desired, the particles should be continuously removed from the system. This method appears to be promising as a continuous process to produce hydroxyapatite parti-cles using an electrochemical method. © 2014 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0)
Lignin-containing Feedstock Hydrogenolysis for Biofuel Component Production Elena Shimanskaya; Аntonina A. Stepacheva; Esther Sulman; Evgeny Rebrov; Valentina Matveeva
Bulletin of Chemical Reaction Engineering & Catalysis 2018: BCREC Volume 13 Issue 1 Year 2018 (April 2018)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.13.1.969.74-81

Abstract

In this paper, the commercial 5%Pd/C and 5%Pt/C catalysts and synthesized 5%Pt/MN-270 and 5%Pd/MN-270 were used in the hydrogenolysis of lignocellulosic material (softwood sawdust) to obtain liquid fuels in the form of hydrocarbons. As lignin has a very complex structure, anisole was used as a model compound. It was found that the use Pt-containing catalysts based on hypercrosslinked polystyrene in both processes of anisole and lignin-containing feedstock conversion allowed obtaining the highest yield of oxygen-free hydrocarbons (up to 96 wt. %). Besides, the polymer based catalysts showed high stability in hydrogenolysis process in comparison with the commercial carbon based catalysts. 
Preparation of 2-Methylnaphthalene from 1-Methylnaphthalene via Catalytic Isomerization and Crystallization Hao Sun; Kang Sun; Jianchun Jiang; Zhenggui Gu
Bulletin of Chemical Reaction Engineering & Catalysis 2018: BCREC Volume 13 Issue 3 Year 2018 (December 2018)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.13.3.2650.512-519

Abstract

Large amounts of residual 1-methylnaphthalene are generated when 2-methylnaphthalene is extracted from alkyl naphthalene. In order to transform waste into assets, this study proposes a feasible process for preparing 2-methylnaphthalene from 1-methylnaphthalene through isomerization and crystallization. The 1-methylnaphthalene isomerization was carried out in a fixed-bed reactor over mixed acids-treated HBEA zeolite. The results showed that acidic properties of catalysts and reaction temperature were associated with the 2-methylnaphthalene selectivity, yield and catalytic stability. At a high reaction temperature of 623 K, the 2-methylnaphthalene yield was 65.84 %, and the deactivation rate was much lower. The separation of reaction products was then investigated by two consecutive crystallization processes. Under optimal conditions, the 2-methylnaphthalene purity attained 96.67 % in the product, while the yield was 87.48 % in the refining process. 
Kinetic Study of Styrene Oxidation over Titania Catalyst Supported on Sulfonated Fish Bone-derived Carbon Ratna Kusumawardani; Mukhamad Nurhadi; Teguh Wirawan; Anton Prasetyo; Nabila Nur Agusti; Sin Yuan Lai; Hadi Nur
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 1 Year 2022 (March 2022)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.1.13133.194-204

Abstract

The kinetic evaluation of titania supported sulfonated fish bone-derived carbon (TiO2/SFBC) as a catalyst in styrene oxidation by aqueous hydrogen peroxide was carried out. The catalysts were prepared by carbonation of fishbone powder at varying temperatures 500, 600 and 700 °C, respectively for 2 h, followed by sulfonation with sulfuric acid (1M) for 24 h and impregnated by varied titania concentration 500, 1000 and 1500 µmol. The physical properties of catalysts were characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX) and the nitrogen adsorption-desorption analysis. The catalytic activity result showed that TiO2/SFBC can be used as a potential catalyst in styrene oxidation. Worth noting that the sulfonation process has not only transformed the TiO2/FBC particulates (without sulfonation) to cuboid-shaped TiO2/SFBC (with sulfonation) but also contributed to the high selectivity of benzaldehyde. On the other hand, carbonization at different temperatures has an indistinct effect on catalytic performance due to their similar surface areas. The styrene conversion rate responded positively with the increasing amount of titania in the functionalized composites. The styrene oxidation by aqueous H2O2 unraveled the first-order reaction with the activation energy of ⁓63.5 kJ. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
NO Dissociation on Platinum and Platinum-Rhodium Alloy: A Theoretical Investigation Vu, Khanh Bao; Phung, Khoa Thanh; Thong, Le Hoang; Linh, Bui Thi; Huyen, Nguyen Ngoc
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 1 Year 2024 (April 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20070

Abstract

In this computational study, the preferential adsorption and co-adsorption sites of various chemical species (N, O, and NO) on the Pt (111) and Rh3Pt (111) surfaces were identified. The preferential adsorption site for NO and co-adsorption sites for N and O on the Pt (111) surface are the hollow (fcc) sites; and these on the Rh3Pt (111) surface are the hollow (fcc1) site and hollow N(hcp2)-O(fcc1) sites, respectively. The activation energies of the NO dissociation reaction on the Pt (111) and Rh3Pt (111) catalytic surfaces are 2.35 and 2.02 eV, respectively. The lower activation energy of the NO decomposition on the Rh3Pt (111) surface is explained by the stronger back-donation from the 4d orbital of the Rh atoms to the 2π* anti-bonding orbital of the NO molecule. The activation energies of the N and O recombination reaction on the Pt (111) and Rh3Pt (111) catalytic surfaces are 1.51 and 2.30 eV, respectively. The study indicates that the Rh3Pt (111) surface not only facilitates the NO decomposition but also better prevents N and O from recombination. Copyright © 2024 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Comparison of Five Advanced Oxidation Processes for Degradation of Pesticide in Aqueous Solution Augustine Chioma Affam; Malay Chaudhuri; Shamsul Rahman M. Kutty
Bulletin of Chemical Reaction Engineering & Catalysis 2018: BCREC Volume 13 Issue 1 Year 2018 (April 2018)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.13.1.1394.179-186

Abstract

The study compared the technical efficiency and economic cost of five advanced oxidation processes (Fenton, UV photo-Fenton, solar photo-Fenton, UV/TiO2/H2O2 and FeGAC/H2O2) for degradation of the pesticides chlorpyrifos cypermethrin and chlorothalonil in aqueous solution. The highest degradation in terms of COD and TOC removals and improvement of the biodegradability (BOD5/COD ratio) index (BI) were observed to be (i) Fenton - 69.03% (COD), 55.61% (TOC), and 0.35 (BI); (ii) UV photo-Fenton -78.56% (COD), 63.76% (TOC) and 0.38 (BI);  (iii) solar photo-Fenton - 74.19% (COD), 58.32% (TOC) and 0.36 (BI); (iv) UV/TiO2/H2O2 - 53.62% (COD), 21.54% (TOC), and 0.26 (BI); and  (v) the most technical efficient and cost effective process was FeGAC/H2O2. At an optimum condition (FeGAC 5 g/L, H2O2 100 mg/L, and reaction time of 60 min at pH 3), the COD and TOC removal efficiency were 96.19 and 85.60%, respectively, and the biodegradation index was 0.40. The degradation rate constant and cost were 0.0246 min-1 and $0.74/kg TOC, respectively. The FeGAC/H2O2 process is the most technically efficient and cost effective for pretreatment of the pesticide wastewater before biological treatment. 
Synthesis of KCC-1 Using Rice Husk Ash for Pb Removal from Aqueous Solution and Petrochemical Wastewater Rosalyza Hasan; Chi Cheng Chong; Herma Dina Setiabudi
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 1 Year 2019 (April 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.1.3619.196-204

Abstract

A silica-rich rice husk ash (RHA, 95.44% SiO2) was used as a silica precursor in the synthesis of KCC-1 for Pb(II) removal. The extraction of silica was carried out under several extraction methods (alkali fusion (AF), reflux (RF) and microwave heating (MW)) and extraction parameters (NaOH/RHA mass ratio, fusion temperature and H2O/NaOH-fused RHA mass ratio). The highest silica content was obtained using AF method at extraction conditions of NaOH/RHA mass ratio = 2, fusion temperature = 550 ºC, and H2O/NaOH-fused RHA mass ratio = 4, with silica concentration of 85,490 ppm. TEM, FTIR, and BET analyses revealed the synthesized KCC-1 has fibrous morphology with surface area of 220 m2/g. The synthesized KCC-1 showed good performance in removal of Pb(II) from aqueous solution (74%) and petrochemical wastewater (70%). The analyses of petrochemical wastewater revealed that the adsorption process using synthesized KCC-1 effectively decreased the concentration of COD (489 mg/L to 106 mg/L), BOD (56 mg/L to 34 mg/L) and Pb(II) (22.8 mg/L to 6.71 mg/L). This study affirmed that KCC-1 was successfully synthesized using RHA as silica precursor and applied as an efficient adsorbent for Pb(II) removal. 
SO2 Mitigation via Catalytic Oxidation using Carbonaceous Materials and Metal Oxides for Environmental Sustainability Edward, Tanoko Matthew; Weng, Ying; Lai, Sin Yuan
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 4 Year 2023 (December 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20031

Abstract

The high concentration of sulfur dioxide (SO2) in the air that contributes to increasing health and environmental issues has caught the attention of all countries. Numerous tactics to regulate and lower the SO2 levels in the environment that have been applied through regulations and promising technology, progress has been obtained to decrease the SO2 concentration. Among methods for SO2 removal, one of the promising techniques used is the catalytic oxidation of SO2 to SO3, which not only reduces the SO2 concentration in the environment but also produces sulfuric acid (H2SO4). Thus, the performance of the catalysts that can promote the catalytic oxidation of SO2 to SO3 for environmental sustainability is reviewed in this study. The types of catalysts evaluated in this study are carbon-based materials and metal oxides. Worth noting that these catalysts are feasible to catalytically converting SO2 hazardous material to resources, viz. SO3 and H2SO4 for industrial use. The findings of this study can serve as a foundation for devising an innovative method for SO2 mitigation through catalytic oxidation. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
[RETRACTED] Simultaneous Elimination of Soot and NOX through Silver-Barium Based Catalytic Materials Ganesh Chandra Dhal; Subhashish Dey; Ram Prasad; Devendra Mohan
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 1 Year 2017 (April 2017)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.12.1.647.71-80

Abstract

This article was retracted due to the following reasons. Retraction note here: https://doi.org/10.9767/bcrec.12.2.1202.App.7 RETRACTION TO:Dhal, G.C., Dey, S., Prasad, R., Mohan, D. (2017). Simultaneous Elimination of Soot and NOX through Silver-Barium Based Catalytic Materials. Bulletin of Chemical Reaction Engineering & Catalysis, 12 (1): 71-80 (doi:10.9767/bcrec.12.1.647.71-80)This article has been retracted by Publisher based on the following reason:Letter to Editor from Prof. James J. Spivey (Department of Chemical Engineering, Louisiana State University) who reported that a comparison of this paper with a previously paper published in Catalysis Today (258 (2015) 405-415, doi:10.1016/j.cattod.2015.02.024) shows significant duplication according to analysis by iThenticate shows 73% similarity, which is far more than acceptable. The authors have plagiarized part of the paper that had already published in [Catalysis Today (258 (2015) 405-415, doi:10.1016/j.cattod.2015.02.024)]. Based on clarification via email, Authors of the above paper have admitted their plagiarism to the previously published paper by Catalysis Today.Editor of Bulletin of Chemical Reaction Engineering & Catalysis acknowledged Prof. James J. Spivey due to the valuable Letter to Editor.One of the conditions of submission of a paper for publication in this journal is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process.

Page 56 of 84 | Total Record : 838

 54   55   56   57   58 

Filter by Year

2007 2026


Reset
Filter By Issues
All Issue 2026: BCREC Volume 21 Issue 3 Year 2026 (October 2026) (Issue in Progress) 2026: BCREC Volume 21 Issue 2 Year 2026 (August 2026) 2026: BCREC Volume 21 Issue 1 Year 2026 (April 2026) 2026: Just Accepted Manuscript and Article In Press 2026 2025: BCREC Volume 20 Issue 4 Year 2025 (December 2025) 2025: BCREC Volume 20 Issue 3 Year 2025 (October 2025) 2025: BCREC Volume 20 Issue 2 Year 2025 (August 2025) 2025: BCREC Volume 20 Issue 1 Year 2025 (April 2025) 2024: BCREC Volume 19 Issue 4 Year 2024 (December 2024) 2024: BCREC Volume 19 Issue 3 Year 2024 (October 2024) 2024: BCREC Volume 19 Issue 2 Year 2024 (August 2024) 2024: BCREC Volume 19 Issue 1 Year 2024 (April 2024) 2023: BCREC Volume 18 Issue 4 Year 2023 (December 2023) 2023: BCREC Volume 18 Issue 3 Year 2023 (October 2023) 2023: BCREC Volume 18 Issue 2 Year 2023 (August 2023) 2023: BCREC Volume 18 Issue 1 Year 2023 (April 2023) 2022: BCREC Volume 17 Issue 4 Year 2022 (December 2022) 2022: BCREC Volume 17 Issue 3 Year 2022 (September 2022) 2022: BCREC Volume 17 Issue 2 Year 2022 (June 2022) 2022: BCREC Volume 17 Issue 1 Year 2022 (March 2022) 2021: BCREC Volume 16 Issue 4 Year 2021 (December 2021) 2021: BCREC Volume 16 Issue 3 Year 2021 (September 2021) 2021: BCREC Volume 16 Issue 2 Year 2021 (June 2021) 2021: BCREC Volume 16 Issue 1 Year 2021 (March 2021) 2020: BCREC Volume 15 Issue 3 Year 2020 (December 2020) 2020: BCREC Volume 15 Issue 2 Year 2020 (August 2020) 2020: BCREC Volume 15 Issue 1 Year 2020 (April 2020) 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019) 2019: BCREC Volume 14 Issue 2 Year 2019 (August 2019) 2019: BCREC Volume 14 Issue 1 Year 2019 (April 2019) 2018: BCREC Volume 13 Issue 3 Year 2018 (December 2018) 2018: BCREC Volume 13 Issue 2 Year 2018 (August 2018) 2018: BCREC Volume 13 Issue 1 Year 2018 (April 2018) 2017: BCREC Volume 12 Issue 3 Year 2017 (December 2017) 2017: BCREC Volume 12 Issue 2 Year 2017 (August 2017) 2017: BCREC Volume 12 Issue 1 Year 2017 (April 2017) 2016: BCREC Volume 11 Issue 3 Year 2016 (December 2016) 2016: BCREC Volume 11 Issue 2 Year 2016 (August 2016) 2016: BCREC Volume 11 Issue 1 Year 2016 (April 2016) 2015: BCREC Volume 10 Issue 3 Year 2015 (December 2015) 2015: BCREC Volume 10 Issue 2 Year 2015 (August 2015) 2015: BCREC Volume 10 Issue 1 Year 2015 (April 2015) 2014: BCREC Volume 9 Issue 3 Year 2014 (December 2014) 2014: BCREC Volume 9 Issue 2 Year 2014 (August 2014) 2014: BCREC Volume 9 Issue 1 Year 2014 (April 2014) 2013: BCREC Volume 8 Issue 2 Year 2013 (December 2013) 2013: BCREC Volume 8 Issue 1 Year 2013 (June 2013) 2013: BCREC Volume 7 Issue 3 Year 2013 (March 2013) 2012: BCREC Volume 7 Issue 2 Year 2012 (December 2012) 2012: BCREC Volume 7 Issue 1 Year 2012 (June 2012) 2011: BCREC Volume 6 Issue 2 Year 2011 (December 2011) 2011: BCREC Volume 6 Issue 1 Year 2011 (June 2011) 2010: BCREC Volume 5 Issue 2 Year 2010 (December 2010) 2010: BCREC Volume 5 Issue 1 Year 2010 (June 2010) 2009: BCREC Volume 4 Issue 2 Year 2009 (December 2009) 2009: BCREC Volume 4 Issue 1 Year 2009 (June 2009) 2008: BCREC Volume 3 Issue 1-3 Year 2008 (December 2008) 2007: BCREC: Volume 2 Issues 2-3 Year 2007 (October 2007) 2007: BCREC: Volume 2 Issue 1 Year 2007 (June 2007) More Issue