Judul: Pengaruh Program Pembangunan Perumahan Bersubsidi Terhadap Tingkat Kesejahteraan Masyarakat Berpenghasilan Rendah (Kasus Program Rumah Murah Jokowi Villa Kencana Cikarang, Desa Sukajadi, Kecamatan Sukakarya, Kabupaten Bekasi, Provinsi Jawa Barat).
Abstrak: Pembangunan perumahan bersubsidi merupakan pembangunan perumahan yang dilakukan oleh pemerintah ditujukan untuk masyarakat berpenghasilan rendah dan belum memiliki rumah. Penelitian ini bertujuan untuk menganalisis pengaruh pembangunan perumahan bersubsidi terhadap tingkat kesejahteraan masyarakat berpenghasilan rendah. Penelitian dilakukan pada masyarakat penerima program di kawasan Perumahan Villa Kencana Cikarang, Desa Sukajadi, Kecamatan Sukakarya, Kabupaten Bekasi. Metode yang digunakan dalam penelitian ini adalah metode kuantitatif yang didukung oleh metode kualitatif. Metode kuantitatif dilakukan dengan menggunakan instrumen kuesioner, sedangkan metode kualitatif dilakukan dengan menggunakan wawancara mendalam. Hasil penelitian menunjukkan bahwa program pembangunan perumahan bersubsidi di Perumahan Villa Kencana Cikarang, Desa Sukajadi tidak berpengaruh terhadap tingkat kesejahteraan secara keseluruhan, namun berpengaruh pada beberapa aspek.
Keyword: Pembangunan Perumahan Bersubsidi, Pengaruh, Kesejahteraan masyaraka

Judul: Pengaruh Pembangunan Perumahan Bersubsidi Terhadap Pranata Ekonomi Masyarakat
Abstrak: Pemerintah berusaha meningkatkan penyediaan kebutuhan rumah bagi kehidupan masyarakat dan mengatasi masalah ketidakpemilikan rumah melalui Program Rumah Murah Jokowi. Villa Kencana Cikarang merupakan salah satu Program Rumah Murah Jokowi yang dibangun di Desa Karangsentosa pada tahun 2015. Pembangunan tersebut memberikan dampak bagi masyarakat yang tinggal di sekitar perumahan meliputi pola penggunaan lahan, perubahan peluang usaha dan ketersediaan sarana dan prasarana perekonomian. Pranata sosial di masyarakat dapat berubah apabila pembangunan mempengaruhi sistem tata kelakuan masyarakat melalui suatu interaksi di masyarakat. Pranata Sosial memiliki beberapa bentuk salah satunya yaitu pranata ekonomi. Penelitian ini menekankan pada pranata ekonomi karena pembangunan dilakukan di atas lahan sawah. Penelitian ini menggunakan metode penelitian kuantitatif yang didukung dengan data kualitatif.Jumlah responden dalam penelitian ini adalah 40 responden. Hasil penelitian ini menunjukkan bahwa terdapat pengaruh yang nyata antara variabel dampak pembangunan perumahan terhadap pranata ekonomi masyarakat.
Keyword: Dampak Pembangunan Perumahan, Pranata Sosial, Pranata Ekonomi

Judul: Extracellular Expression of thermostable Geobacillus stearothermophilus T1.2RQ Lipase for Biodiesel Production
Abstrak: The extracellular expression of enzymes in an excellent secretion host such as Bacillus subtilis is a useful strategy for making enzymes of industrial significance more affordable by lowering the cost of its downstream processing. Lipases are a category of hydrolases that catalyze the hydrolysis of triglycerides to glycerol and free fatty acids. Also, lipases catalyze the hydrolysis and transesterification of other esters as well as the synthesis of esters. They can perform very specific biotransformation reactions and are widely used in food, organic synthesis, detergents, cosmetic, and pharmaceutical industries. Geobacillus stearothermophilus T1.2RQ lipase is an industrially-desired thermostable lipolytic enzyme with an excellent hydrolytic and transesterification activity. This study aimed to express T1.2RQ lipase, in B. subtilis WB800 and ensure its secretion into the extracellular medium. Three signal peptides (AmyQ, Epr, LipA) and two promoters (Pgrac01 and Pgrac100) were used in the secretory-expression of T1.2RQ lipase, based on five constructed expression vectors constructed by restriction cloning and PCR mutagenesis. Sangers sequencing was used to verify constructs to ensure they are in the correct reading frame. Recombinants vectors, pHT43 (plasmid control), pHT43-T1.2RQ, pHT43- T1.2RQ_AmyQ, pHT43-T1.2RQ_Epr, and pHT43-T1.2RQ_LipA, were transformed by electroporation into Bacillus subtilis WB800. The electroporation was successful with the optimum condition of 2500V, 200 ohms, 25µF, and 5milliseconds. Recombinant B. subtilis pHT43 (negative control) and pHT43-T1.2RQlip + signal peptides were streaked on the lipidic agar, LA+TBN. All four recombinants, including the negative control (B. subtilis WB800-pHT43), produced clear zones on the TBN agar plate after overnight incubation (fig 2), indicating the presence of a lipolytic enzyme in all of the recombinant B. subtilis cells. pHT43-T1.2RQlip + signal peptides (AmyQ, Epr, and LipA) have clear zones with significantly higher diameters than B. subtilis WB800-pHT43 (negative control). This phenomenon suggests that the recombinant thermostable lipase T1.2RQ introduced into these cells was successfully expressed, thereby increasing the lipolytic capability of its host cells T1.2RQ lipase was expressed in 50ml terrific broth medium (TB) and the expression induced with 1mM IPTG. Lipase activity assay using p-nitrophenyl esters showed that all three signal peptides directed the secretion of T1.2RQ lipase into the extracellular medium. Signal peptide, LipA, resulted in the highest extracellular activity of 5.6 U/mL, which corresponds to a 6-fold increase over the parent B. subtilis WB800 strain. Meanwhile, signal peptides, AmyQ and Epr produced 4.2 U/mL and 3.4 U/mL activity respectively. SDS-Zymogram analysis confirmed that T1.2RQ lipase was correctly processed and secreted in its original size of 44 kDa. An attempt to further increase lipase expression level by promoter optimization showed that, contrary to expectation, promoter Pgrac100 exhibited similar expression levels as the original Pgrac01. Nevertheless, the demonstration of the successful secretion of T1.2RQ lipase in this work confirms the latter as a promising approach for the industrial production of the enzyme
Keyword: Bacillus subtilis, Expression, Extracellular, Heterologous, Lipase, Thermostable