Analisa Perbandingan Faktor-faktor Penentu Pemilihan Konsumen Dalam Penggunaan Koran Cetak Atau E-paper Pada Produk Harian Kompas Di Surabaya Jawa Timur

Digital newspaper is a newspaper that provides news service that is more practical to use the help of technologies such as tablets or smartphones. Currently publishing industry newspaper / newspaper enlivened by various newspapers that offer various advantages attributes of their products. The number of options that make consumers freely make choices according to their needs and this is a major challenge for marketers so that their products can compete. This study aimed to analyze the factors that determines the customer in making decisions Kompas daily use of the product in Surabaya and to analyze the differences of the determinants of decision making use of print newspapers or e-paper products Kompas daily in Surabaya. This research was conducted by distributing questionnaires to 100 people use the products daily Kompas in Surabaya. Analysis technique used is the technique of quantitative analysis by ANOVA. The results showed that the factors that influence the decision to use the products daily Kompas in Surabaya is a personal factor , and there are differences in determinants of visits of cultural variable

Supercritical carbon dioxide assisted polymer processing

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Supercritical carbon dioxide assisted polymer processing

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Extracting hydroxyapatite and its precursors from natural resources

Healing of segmental bone defects remain a difficult problem in orthopedic and trauma surgery. One reason for this difficulty is the limited availability of bone material to fill the defect and promote bone growth. Hydroxyapatite (HA) is a synthetic biomaterial, which is chemically similar to the mineral component of bones and hard tissues in mammals and, therefore, it can be used as a filler to replace damaged bone or as a coating on implants to promote bone in-growth into prosthetic implants when used in orthopedic, dental, and maxillofacial applications. HA is a stoichiometric material with a chemical composition of Ca10(PO4)6(OH)2, while a mineral component of bone is a non-stoichiometric HA with trace amounts of ions such as Na+, Zn2+, Mg2+, K+, Si2+, Ba2+, F-, CO3 2-, etc. This review looks at the progress being made to extract HA and its precursors containing trace amount of beneficial ions from biological resources like animal bones, eggshells, wood, algae, etc. Properties, such as particle size, morphology, stoichiometry, thermal stability, and the presence of trace ions are studied with respect to the starting material and recovery method used. This review also highlights the importance of extracting HA from natural resources and gives future directions to the researcher so that HA extracted from biological resources can be used clinically as a valuable biomaterial