53 research outputs found

    Green diesel production via hydrodeoxygenation of triglycerides

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    En raison des problĂšmes environnementaux associĂ©s Ă  l'utilisation des combustibles fossiles, qui augmentent les Ă©missions de gaz Ă  effet de serre et causent les changements climatiques, et pour satisfaire le besoin mondial de carburants durables et surmonter une Ă©ventuelle crise Ă©nergĂ©tique, une part important de l'attention de la communautĂ© scientifique est aujourd’hui consacrĂ©e Ă  la dĂ©couverte de sources d’énergie renouvelables. L'une des meilleures alternatives est le diesel vert qui pourrait ĂȘtre produit Ă  partir d'huiles vĂ©gĂ©tales (aucune quantitĂ© nette de dioxyde de carbone n'est rejetĂ©e dans l'atmosphĂšre). Ces types d'huiles sont convertis en diesel vert par rĂ©action d'hydrotraitement Ă  haute tempĂ©rature et pression en prĂ©sence d'un catalyseur hĂ©tĂ©rogĂšne qui joue un rĂŽle essentiel dans ce processus. Ces catalyseurs hĂ©tĂ©rogĂšnes, qui peuvent ĂȘtre bi- ou monomĂ©talliques, sont constituĂ©s d'un support et d'un composĂ© mĂ©tallique actif. Les caractĂ©ristiques du support telles que la surface spĂ©cifique, le volume des pores et le diamĂštre des pores ont un effet dĂ©terminant sur les propriĂ©tĂ©s finales du catalyseur formĂ©. Ils peuvent dĂ©terminer la quantitĂ© de la charge de phase active optimale et peuvent ĂȘtre adaptĂ©s Ă  la taille molĂ©culaire du rĂ©actif. Dans cette thĂšse, un support d'alumine-Îł mĂ©soporeuse a d’abord Ă©tĂ© synthĂ©tisĂ© en utilisant un polymĂšre tensioactif par voie sol-gel et accompagnĂ© d'un auto-assemblage induit par Ă©vaporation (EISA). L'isopropoxyde d'aluminium (Al(O-i-Pr)₃) et le copolymĂšre tribloc (Pluronic P123) ont Ă©tĂ© respectivement utilisĂ©s comme source d'aluminium et agent directeur de structure. La tempĂ©rature de calcination optimale et le rapport massique P123/Al(O-i-Pr)₃ respectivement de 700ÂșC (avec 3 h de temps de trempage) et 0.98 permettent la production de Îł-alumine avec des propriĂ©tĂ©s texturales appropriĂ©es. À l'Ă©tape suivante, 15% en poids de MoO₃ et 3% en poids de NiO ou CoO ont Ă©tĂ© imprĂ©gnĂ©s sur le support prĂ©parĂ© pour former NiMo/Îł-alumine et CoMo/Îł-alumine respectivement aprĂšs calcination. Suite Ă  une sulfuration ex-situ, l'hydrotraitement de l'huile de canola a Ă©tĂ© effectuĂ© dans un rĂ©acteur continu pour la production de diesel vert. Une plage de tempĂ©rature de 325 Ă  400°C et une de LHSV de 1 Ă  3 h⁻Âč ont Ă©tĂ© Ă©tudiĂ©es tandis que les autres paramĂštres opĂ©rationnels ont Ă©tĂ© maintenus constants Ă  P: 450 psi et H2/huile: 600 mLmL⁻Âč. Les deux catalyseurs ont permis la production de diesel vert (principalement C15-C18) tandis que NiMo a montrĂ© une activitĂ© lĂ©gĂšrement supĂ©rieure Ă  un LHSV plus Ă©levĂ©. La tempĂ©rature optimale et le LHSV se sont rĂ©vĂ©lĂ©s ĂȘtre 325ÂșC et 1 h⁻Âč. Finalement, des catalyseurs Ni/Îł-alumine (rĂ©duite) respectueux de l'environnement avec structure mĂ©soporeuse ont Ă©tĂ© synthĂ©tisĂ©s par des procĂ©dĂ©s sol-gel (une Ă©tape) et d'imprĂ©gnation (deux Ă©tapes). Une teneur en oxyde de nickel plus faible a Ă©tĂ© observĂ©e dans un catalyseur dĂ©rivĂ© du sol-gel par rapport aux produits imprĂ©gnĂ©s, ce qui est dĂ» Ă  l'incorporation de nickel dans le rĂ©seau de l'alumine. AprĂšs la rĂ©duction, du nickel mĂ©tallique a Ă©tĂ© formĂ© dans les deux catalyseurs. L'hydrotraitement de l'huile de canola a Ă©tĂ© effectuĂ© sur les deux catalyseurs (tempĂ©rature: 400°C, P: 500 psi, LHSV: 0.5 h⁻Âč, H2/huile: 600 mLmL⁻Âč) et des hydrocarbures normaux, principalement C15-C18. Il a Ă©tĂ© observĂ© que la conversion des triglycĂ©rides Ă©tait initialement plus Ă©levĂ©e pour le catalyseur imprĂ©gnĂ© et, aprĂšs un temps en ligne de 300 min, elle tombe Ă  des valeurs infĂ©rieures Ă  celles du catalyseur sol-gel, ce qui montre la plus grande stabilitĂ© au fil du temps de ce dernier.Owing to environmental issues concerning fossil fuels usage which increase the greenhouse gas emissions and cause climate change, and to satisfy the global need for sustainable fuels and overcome possible energy crisis much attention is devoted to the finding of sustainable energy sources. One of the best alternatives is green diesel which could be produced from vegetable oils (no net amount of carbon dioxide is released into the atmosphere). These kinds of oils are converted to green diesel via hydrotreating reaction at high temperature and pressure in the presence of a heterogeneous catalyst which plays an essential role in this process. These heterogeneous catalysts which could be bi- or monometallic, consist of a support and an active metal compound. The characteristics of the support such as specific surface area, pore volume and pore diameter have a determining effect on the final properties of the formed catalyst. They can determine the amount of optimum active phase loading and should be adapted to the reactant molecular size. In this thesis first, the Îł-alumina support was one-pot synthesized via polymeric template assisted sol-gel and evaporation-induced self-assembly process. Aluminum isopropoxide (Al(O-i-Pr)₃) and triblock copolymer template (Pluronic P123) were respectively used as aluminum source and structure directing agent. The optimum calcination temperature and P123/Al(O-i-Pr)₃ mass ratio were respectively found to be 700ÂșC (with 3 h of soaking time) and 0.98 enabling the production of Îł-alumina with appropriate textural properties. In the next step, 15% wt. MoO₃ and 3% wt. NiO or CoO were impregnated on the prepared support to respectively form NiMo/Îł-alumina and CoMo/Îł-alumina after subsequent calcination. Following an ex-situ sulfidation, the hydrotreatment of canola oil was performed in a continuous reactor to result in green diesel production. Temperature range of 325 to 400ÂșC and LHSV of 1 to 3 h⁻Âč were studied while the other process parameters were kept constant at P: 450 psi and H2/oil: 600 mLmL⁻Âč. Both catalysts are promising for green diesel (mainly C15-C18) production while NiMo showed a slightly higher activity at higher LHSV. The optimum temperature and LHSV were found to be 325ÂșC and 1 h⁻Âč. Finally, the environmentally friendly Ni/Îł-alumina (reduced) catalysts with mesoporous structure were synthesize through sol-gel (one-step) and impregnation (two-step) methods. Lower bulk nickel oxide content was detected in sol-gel derived catalyst compared to impregnated ones which is due to the incorporation of nickel inside the alumina framework. After the reduction, metallic nickel was formed in both catalysts. Canola oil hydrotreatment was performed over both catalysts (temperature: 400ÂșC, P: 500 psi, LHSV: 0.5 h-1, H2/oil: 600 mLmL⁻Âč) and normal hydrocarbons, mainly C15-C18, were produced. The triglyceride initial conversion was observed to be higher over the impregnated catalyst while after a time on stream of 300 min, it falls to values lower than that of the sol-gel catalyst, showing the higher stability over time of the latter

    ANTIBACTERIAL ACTIVITY OF SILVER NANOPARTICLES SYNTHESIZED FROM CLAUSENA ANISATA (WILLD.) HOOK F EX BENTH (RUTACEAE)

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    ABSTRACTObjective: In the present study, the antibacterial activity of silver nanoparticles synthesized from Clausena anisata was analyzed by using agar well diffusion and disc diffusion method. Clausena anisata, a medicinal plant belonging to the family Rutaceae, is represented by 20 species available in India and used traditionally for the treatment of several ailments but there is a requirement to identify its phytoconstituents, its target, mode of action and treatment using plant products either alone or in combination with synthetic drugs.Methods: Clausena anisata leaves and roots were procured from Manamettupatti, a village in Pudukottai District, Tamilnadu. The shade dried leaf and root was powdered and extracted using ethanol by maceration method. The extracts of leaf and root were further subjected to synthesis silver nanoparticles, characterized and the antibacterial activity was studied against Bacillus subtilis, Staphylococcus aurues, Escherichia coli, Proteus vulgaris, Pseudomonas aeruginosa and Provedencia rettgeri. Results: The SNP leaf and root extracts showed antibacterial activity in the concentration ranging from 50 ”g ñ€“ 150 ”g/ml. All the extracts showed antibacterial activity against all the tested microorganisms. In which, the SNP leaf extract showed maximum zone of inhibition against P. aeruginosa (12±0.5) (P<0.0001), followed by Bacillus subtilis (P<0.0001), Staphylococcus aurues (P<0.0001), Proteus vulgaris (P<0.0001) and P. rettgeri (P<0.001) with each 10 mm in diameter and E. coli with 8±0.6 mm in diameter, where standard showed 15±0.57 mm in diameter against E.coli. The maximum zone of inhibition for SNP root extract was observed against E. coli (P<0.01) and P. retttgeri (P<0.01) with 15 mm in diameter each, followed by P. aeruginosa (P<0.0001), B. subtilis (P<0.0001), S. aureus (P<0.0001)  and P. vulgaris (P<0.0001) with 14±2.5 mm, 12±1.52, 12±2.1 and 9±0.57 mm zone of inhibition respectively and standard showed 20±1.52 mm zone of inhibition against P. rettgeri.Conclusion: The phytoconstituents of C. anisata SNP root extract may be acting synergistically or independently in exerting an overall antibacterial action in this study, and that should be chemically analyzed and their chemical structure should be understood in order to develop an effective antibacterial therapeutic agent in future

    The Quest for Competitive Sustainability: From Technology Sourcing to Knowledge Management

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    This study undertakes an analysis of external sourcing of knowledge by biotechnology companies. It suggests that biotechnology companies need to be more realistic about R&D operational models in a context where technological changes are only incremental and companies based solely on single technology platforms are highly inefficient. It is argued that in order to build, preserve or enhance their knowledge creation capabilities in a fast changing environment, firms increasingly combine internal ‘‘core’’ capabilities with externally acquired ‘‘complementary’’ ones. Knowledge creation requires in reaching the right balance between exploration and exploitation. It consists of activities within the firm in order to create knowledge from its own experience and from the experience of other firms, and on the exploitation of that knowledge to fulfill the mission of the firm. Thus, a biotechnology company’s ability to choose technologies wisely will have a large impact on the performance of its R&D organization in terms of time to market, productivity, and product quality.This study undertakes an analysis of external sourcing of knowledge by biotechnology companies. It suggests that biotechnology companies need to be more realistic about R&D operational models in a context where technological changes are only incremental and companies based solely on single technology platforms are highly inefficient. It is argued that in order to build, preserve or enhance their knowledge creation capabilities in a fast changing environment, firms increasingly combine internal ‘‘core’’ capabilities with externally acquired ‘‘complementary’’ ones. Knowledge creation requires in reaching the right balance between exploration and exploitation. It consists of activities within the firm in order to create knowledge from its own experience and from the experience of other firms, and on the exploitation of that knowledge to fulfill the mission of the firm. Thus, a biotechnology company’s ability to choose technologies wisely will have a large impact on the performance of its R&D organization in terms of time to market, productivity, and product quality.This study undertakes an analysis of external sourcing of knowledge by biotechnology companies. It suggests that biotechnology companies need to be more realistic about R&D operational models in a context where technological changes are only incremental and companies based solely on single technology platforms are highly inefficient. It is argued that in order to build, preserve or enhance their knowledge creation capabilities in a fast changing environment, firms increasingly combine internal ‘‘core’’ capabilities with externally acquired ‘‘complementary’’ ones. Knowledge creation requires in reaching the right balance between exploration and exploitation. It consists of activities within the firm in order to create knowledge from its own experience and from the experience of other firms, and on the exploitation of that knowledge to fulfill the mission of the firm. Thus, a biotechnology company’s ability to choose technologies wisely will have a large impact on the performance of its R&D organization in terms of time to market, productivity, and product quality

    The Quest for Competitive Sustainability: From Technology Sourcing to Knowledge Management

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    Pemodelan Website Geografis Tempat Pelayanan Kesehatan di Palembang

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    Tempat pelayanan kesehatan bertujuan untuk memberikan pelayanan kesehatan kepada masyarakat melalui lembaga institusi pelayanan kesehatan. Masyarakat di Kota Palembang mendapatkan informasi tempat pelayanan kesehatan melalui informasi masyarakat sekitar, lembaga pelayanan kesehatan dan beberapa situs internet yang ditampilkan secara terpisah. Maka sebuah website geografis diperlukan untuk menampilkan tata letak lokasi pelayanan kesehatan dan informasi lengkap tentang pelayanan kesehatan di Kota Palembang. Penelitian ini bertujuan untuk membuat sebuah pemodelan website geografis tempat pelayanan kesehatan di Kota Palembang. Pemodelan yang digunakan berbasis object oriented dengan menerapkan use case diagram dan activity diagram

    PERBEDAAN EKSPRESI GEN TUMOR NECROSIS FACTOR ALPHA ANTARA PASIEN RINOSINUSITIS KRONIS DENGAN KULTUR KUMAN STAPHYLOCOCCUS AUREUS COAGULASE NEGATIVE STAPHYLOCOCCUS

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    Latar belakang : Rinosinusitis Kronis (RSK) adalah penyakit inflamasi mukosa hidung dan sinus paranasal yang berlangsung paling kurang 12 minggu. Penyakit ini merupakan penyakit multifaktorial dan memiliki etiologi yang kompleks serta saling mempengaruhi antara berbagai mikroorganisme, gangguan lingkungan, dan faktor host. Saat ini pada guideline, penggunaan antibiotika pada rinosinusitis kronis hanya jika terdapat gejala berupa ingus mukopurulen satu sisi, nyeri wajah satu sisi, demam 38’C, terdapat double sickening, gejala yang memberat sesudah pemeriksaan, peningkatan CRP dan LED. Sementara itu, pada literatur telah ditemukan adanya kuman pada sinus paranasal pasien RSK. Kuman terbanyak adalah Staphylococcus aureu (S. aureus) dan Coagulase Negative Staphylococcus (CoNS). Adanya kuman pada hidung dan sinus paranasal dapat mencetuskan reaksi pada sistem imun mukosa, salah satunya adalah dengan dihasilkan sitokin proinflamasi seperti Tumor Necrosis Factor alpha (TNFα). Tujuan: Mengetahui adanya perbedaan ekspresi gen TNFα pada pasien rinosinusitis kronis dengan kultur kuman Staphylococcus aureus dan kultur kuman Coagulase Negative Staphylococcus pada pasien rinosinusitis kronis di RSUP Dr.M. Djamil Padang. Metode: Penelitian kuantitatif dengan desain cross sectional comparative study pada masing-masing 12 bula etmoid pasien rhinosinusitis kronis dengan kultur kuman S. aureus dan CoNS yang diambil saat operasi Functional Endoscopic Sinus Surgery (FESS). Semua sampel dilakukan pemeriksaan ekspresi gen dengan metode Real Time Polymerase Chain Reaction (RT-PCR). Data dianalisis dengan SPSS, dikatakan bermakna bila P<0.05. Hasil: Ekspresi TNFα pada pasien rhinosinusitis dengan kultur kuman S. aureus lebih tinggi (6,6113,26). dibandingkan dengan kultur kuman CoNS (1,221,26). Terdapat perbedaan bermakna secara statistik pada ekspresi TNFα pada pasien rhinosinusitis kronis antara kultur kuman S. aureus dibandingan dengan kultur kuman CoNS (p<0,05). Kesimpulan: Pada penelitian ini dijumpai peningkatan ekspresi TNFα pada pasien rhinosinusitis kronis dengan kultur kuman S. aureus dibandingkan dengan kultur kuman CoNS. Kata Kunci : Chronic Rhinosinusitis, Staphylococcus aureus, Coagulase Negative Staphylococcus, TNF Alpha, RT-PC

    Sistem Informasi Karya Tulis Ilmiah (KTI) Mahasiswa Di Politeknik PalComTech

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    LPPM Politeknik PalComTech adalah suatu lembaga yang menaungi dan memberikan pelayanan kegiatan penelitian dan pengabdian masyarakat di Politeknik PalComTech. Selain itu, LPPM  Politeknik PalComTech bertugas memproses pengumpulan karya tulis ilmiah mahasiswa. Pengumpulan karya tulis dilakukan oleh mahasiswa Politeknik PalComTech yang telah dinyatakan lulus ujian akhir. Mahasiswa kemudian menyerahkan hardcopy karya tulis ilmiah dan pegawai LPPM melakukan pengecekan isi karya tulis ilmiah yang disesuaikan dengan standar yang berlaku. Kemudian proses perbaikan karya tulis  dilakukan mahasiswa ke bagian LPPM dengan menggunakan media email. Pendataan karya tulis ilmiah masih menggunakan aplikasi spreadsheet yang menyulitkan pegawai LPPM karena pengolahan data yang tidak terintegrasi dan  tidak didalam satu tempat penyimpanan (file disimpan terpisah). Dengan cara ini menjadikan kegiatan bimbingan KTI lebih lambat dan membutuhkan banyak waktu dimana mahasiswa juga harus mengantri satu persatu untuk melakukan proses bimbingan karya tulis ilmiah ke bagian LPPM, berdasarkan penjelasan tersebut diperlukan sebuah sistem informasi Karya Tulis Ilmiah (KTI) mahasiswa.  Sistem informasi ini bertujuan untuk membantu bagian LPPM dalam mengolah data karya tulis ilmiah mahasiswa di Politeknik PalComTech. Pembangunan sistem informasi berbasis website dengan menerapkan diagram kontext dan ER Diagram. Metode yang digunakan adalah incremental sebagai teknik pengembangan sistem yang memiliki keunggulan dalam perulangan sistem sampai versi terlengkap sebagai produk akhir dari proses

    Penerapan Extreme Programming dalam Membangun Aplikasi Pengaduan Layanan Pelanggan (PaLaPa) pada Perguruan Tinggi

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    Layanan pengaduan yang dimiliki oleh Perguruan Tinggi umumnya hanya menjadikan mahasiswa sebagai fokus utama dalam peningkatan layanan, hal ini dikarenakan mahasiswa adalah pengguna langsung jasa yang ditawarkan oleh Perguruan Tinggi. Layanan pengaduan tidak memfasilitasi pengaduan yang mungkin dapat diberikan oleh pengguna jasa lainnya, seperti pengguna lulusan atau masyarakat sasaran kegiatan pengabdian masyarakat yang dilakukan oleh dosen Perguruan Tinggi tersebut. Penelitian ini bertujuan membangun sebuah aplikasi berbasis web yang dapat digunakan seluruh pengguna jasa Perguruan Tinggi untuk melakukan pengaduan. Pembangunan aplikasi menerapkan metodologi rekayasa perangkat lunak agar dapat menghasilkan perangkat lunak tepat waktu. Metodologi yang digunakan adalah Extreme Programming. Hasil dari penelitian menunjukkan bahwa penerapan Extreme Programming pada pengembangan aplikasi mengakibatkan pengembangan dapat dilakukan secara cepat dengan jumlah anggota tim yang minimal. Pengembangan dapat dilakukan dengan cepat karena pengembangan aplikasi dimulai dengan membangun komponen yang paling sederhana terlebih dahulu, yaitu komponen verifikasi akun, yang dilanjutkan dengan komponen lainnya. Hasil pengujian menggunakan metode black box aplikasi dapat dijalankan sebagaimana mestinya dan memenuhi acceptance criteria pada user story. AbstractThe complaint service system owned by College generally only focuses on the students in the improvement of services, this is because students are the direct users of the services offered by the College. Complaints service did not facilitate the complaints which may be given by other service users, such as graduates' user or community targeted in the society devotion activities undertaken by the College lecturer. This research aims to build a web-based application that can be used throughout the service users of the College to conduct complaints. Application development applying software engineering methodologies in order to provide the software on time. The methodology used is Extreme Programming. The result of the research shows that the application of the Extreme Programming in the development of applications resulted in development can be done quickly with a minimal number of the team member. The development can be done quickly because the application development started by building the simplest component in advance, i.e. account verification component, followed by other components. The results of the testing using black box method was the application can be run properly and meets the acceptance criteria on a user story.Aplikasi layanan pengaduan yang diberikan oleh PT umumnya hanya berfokus terhadap pelayanan yang diberikan kepada mahasiswa sebagai pengguna langsung terhadap jasa yang ditawarkan PT. Aplikasi tidak memberikan fasilitas terhadap pengaduan yang diberikan oleh pengguna jasa lainnya, misalnya oleh pengguna lulusan yang ingin memberikan pengaduan mengenai kompetensi lulusan yang dihasilkan agar dapat dijadikan masukan dalam memperbaiki kualitas mahasiswa yang dihasilkan maupun oleh masyarakat sasaran pengabdian masyarakat yang ingin memberikan saran mengenai materi pengabdian yang tidak sesuai dengan proposal kegiatan yang ditawarkan. Penelitian ini bertujuan membangun sebuah aplikasi berbasis web yang dapat digunakan seluruh pengguna jasa PT untuk melakukan pengaduan. Pembangunan aplikasi menerapkan metodologi rekayasa perangkat lunak agar dapat menghasilkan perangkat lunak tepat waktu. Metodologi yang digunakan adalah Extreme Programming. Hasil dari penelitian menunjukkan bahwa penerapan Extreme Programming pada pengembangan aplikasi mengakibatkan pengembangan dapat dilakukan secara cepat dengan jumlah anggota tim yang minimal. Hasil pengujian menggunakan metode black box aplikasi dapat dijalankan sebagaimana mestinya dan memenuhi acceptance criteria pada user story. Abstract The complaint service system owned by College generally only focuses on the students in the improvement of services, this is because students are the direct users of the services offered by the College. Complaints service did not facilitate the complaints which may be given by other service users, such as graduates' user or community targeted in the society devotion activities undertaken by the College lecturer. This research aims to build a web-based application that can be used throughout the service users of the College to conduct complaints. Application development applying software engineering methodologies in order to provide the software on time. The methodology used is Extreme Programming. The result of the research shows that the application of the Extreme Programming in the development of applications resulted in development can be done quickly with a minimal number of the team member. The development can be done quickly because the application development started by building the simplest component in advance, i.e. account verification component, followed by other components. The results of the testing using black box method was the application can be run properly and meets the acceptance criteria on a user story.

    Komunikasi Persuasif Agen Prudential Cabang Kasablanka Jakarta dengan Calon Nasabah

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    Komunikasi persuasif adalah komunikasi yang bertujuan untuk membujuk komunikan. Dalam hubungan antara agen asuransi dan calon nasabah komunikasi persuasif memegang peran penting penelitian ini berfokus untuk memahami komunikasi persuasif antara agen Prudential Jakarta dalam meyakinkan calon nasabah dan untuk memahami strategi agen dalam meyakinkan calon nasabah. Penelitian ini menggunakan paradigma konstruktivisme dan teori Kemungkinan Elaborasi. Pendekatan penelitian kualitatif dengan jenis penelitian deskriptif. Metode yang digunakan adalah studi kasus. Teknik pengumpulan data dilakukan dengan wawancara mendalam, observasi, studi kepustakaan, dan dokumentasi. Teknik analisis data: triangulasi data. Hasil penelitian menunjukkan komunikasi persuasif yang digunakan agen Prudential dalam mendekati calon nasabah adalah dengan pendekatan personal. Sebelum melakukan prospek, para agen prudential mencari tahu terlebih dahulu mengenai kehidupan, kebiasaan, dan aktivitas calon nasabahnya. Dengan demikian agen Prudential dapat menarik minat calon nasabah untuk menabung di Prudential. Dengan strategi ini calon nasabah menunjukkan perubahan perilaku, yang awalnya menolak berubah menjadi tertarik dengan asuransi karena melihat keuntungan dan manfaat menjadi nasabah asuransi Prudential. Dalam dunia asuransi agen Prudential memiliki peran yang besar untuk mempengaruhi calon nasabah. Untuk itu seorang agen harus dapat melakukan komunikasi persuasif. Kontribusi penelitian ini terdapat kontribusi akademis yang diharapkan dapat memberi data baru tentang teori kemungkinan elaborasi. Kontribusi metodologis untuk menambah wawasan baru dan mengembangkan metode studi kasus. Kontribusi praktis yang dapat dijadikan sebagai sumber informasi bagi agen asuransi yang ingin meyakinkan calon nasabah. Kata kunci: komunikasi persuasif, agen, nasaba

    The relationship between attentional bias, anxiety sensitivity and metacognitive beliefs in substance abuser: with an emphasis on mediating effects of emotion regulation strategies

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    Background: Several studies have shown that Attentional Bias plays a role in the beginning, persistence and relapse of Substance Abuse Disorder. Therefore, identifying the factors related to Attentional Bias in Substance Abusers is important. In so doing, the present study was aimed at examining the relationship between attentional bias, Anxiety Sensitivity and Metacognitive Beliefs in Substance Abusers with an emphasis on mediating effects of Emotion Regulation Strategies.Methods: The present study is fundamental in terms of the objective and descriptive regarding data collection which was conducted within the framework of a correlation study. The statistical universe comprised a group of soldiers in Tehran who were considered as Substance Abusers and had been referred to Addiction Treatment Centers of Baharestan County. Among the statistical universe, 120 participants were selected by non-random purposive sampling. Finally, Anxiety Sensitivity, Metacognitive Beliefs, Emotional Regulation Strategies and the Stroop test questionnaires were conducted on the sample. For sorting, processing and analysis of data and the evaluation of the research hypothesis, we used the SPSS and LISREL. To examine the relationship between variables, the Pearson correlation and path analysis were used.Results: Pearson correlation results indicated that Anxiety Sensitivity, Metacognitive Beliefs, Suppression, and Reappraisal have a significant relationship with the Attentional Bias.The results of the path analysis revealed that the direct effect of Anxiety Sensitivity and Metacognitive Beliefs on the Attentional Bias is not significant, but these structures may have an effect on the Attentional Bias only through the mediator variables (Suppression and Reappraisal).Conclusion: An individual resorts to metacognitive beliefs to get rid of the negative emotions caused by high Anxiety Sensitivitybut these emotions get intensified in this process and the individual in the long term experiences Substance Abuse through avoidance strategies such as Suppression.Therefore, whenthe personexperiences negative emotions, he will have an Attentional Bias toward liberating signs of Substance Abuse inside and outside
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