18 research outputs found

    ANALISIS STATUS DAN INDIKATOR KINERJA PEMBANGUNAN BERKELANJUTAN PERIKANAN MINI PURSE SEINE DI PANTAI UTARA JAWA

    Get PDF
    Hingga saat ini informasi dasar bagi formulasi kebijakan pembangunan berkelanjutan di subsektor perikanan tangkap di Indonesia masih banyak didasarkan pada hasil pengkajian stoksumberdaya (sfock assessment) species target. Pendekatan stock assessment ini sangat membutuhkan informasi yang substansial, survei independen dan model yang rumit serta banyak dinilai tidak cukup memadai untuk menilai kelestarian sumberdaya perikanan yang sangat bersifat multi-dimensi

    ASSOCIATIVE EFFECT OF MOLASSES-UREA BLOCK AND FORAGE QUALITY ON NUTRIENT DIGESTION AND NITROGEN RETENTION IN SHEEP

    No full text
    A study was conducted in a 4x4 Latin square design involving four adult crossbred (Kaghani x Rambouillet) weather kept in individual metabolic crates and four experimental diets viz: maize stovers (Diet A), maize stovers with 150 g/d molasses-urea block (Diet B), lucerne hay (Diet C)and lucerne hay with 150 g/d molasses-urea block (Diet D). The forage intake was restricted to 2% of body weight. Each experimental period consisted 10 days of adaptation followed by five days of data collection. Total dry matter intake on molasses-urea block (MUB) supplemented diets was higher (p<0.05) than unsupplemented diets. The daily quantity of total dry matter and water consumed by weathers was higher (p < 0.001) on MUB supplemented diets. Water consumption was positively co-related to nitrogen intake (r2 0.66: p< 0.00 I) and varied due to diets (p < 0.00 I). in vivo dry matter digestibility (DMD) and organic matter digestibility (OMD) of lucerne hay-based diets were greater (P< 005) than those containing maize stovers. Supplementation of MUB did not affect the DMD or OMD of the diets. The interaction of MUB and forage (P = 0.06) revealed that MUB was effective in increasing (P< 0.05) the nitrogen digestibility of maize stovers from 30,59% on diet A to 51.33% on diet B but did not affect the nitrogen digestibility in animals fed lucerne hay. The wethers receiving lucerne hay-based diets retained more nitrogen (p< 0.001) than those given maize stovers (8.50 's 3,12 g/d). Molasses-urea block supplementation on both forages increased (p < 0.05) the nitrogen retention. Mean nitrogen retention was I 82. 4.41, 7 .19 and 9.82 gld in wethers receiving diets A. B. C and D. respectively. Mean rumen ammonia concentration (mg N/lOO ml) in wethers receiving maize stovers. was 10.52. which increased (p< 0,05) to 17.87 in response to MUB supplementation. On lucerne hay. the rumen ammonia concentrations did not change due to MUB and the mean values on diets C and D were 24,24 and 29.88 mg N/100 ml. rcspectively. It was concluded that MUB supplementation did not affect in vivo dry matter or organic matter digestibility of the experimental diets. but was effective in supporting higher nitrogen retention. Diets based on lucerne hay supported higher nitrogen retention in wethers than those fed maize stovers. Feeding of MUB increased the demand for drinking water

    Cell Adhesion and Degradation Behaviors of Acetylated Chitosan Films

    No full text

    Modulation of biointeractions by electrically switchable oligopeptide surfaces: structural requirements and mechanism

    Get PDF
    Understanding the dynamic behavior of switchable surfaces is of paramount importance for the development of controllable and tailor-made surface materials. Herein, electrically switchable mixed self-assembled monolayers based on oligopeptides have been investigated in order to elucidate their conformational mechanism and structural requirements for the regulation of biomolecular interactions between proteins and ligands appended to the end of surface tethered oligopeptides. The interaction of the neutravidin protein to a surface appended biotin ligand was chosen as a model system. All the considerable experimental data, taken together with detailed computational work, support a switching mechanism in which biomolecular interactions are controlled by conformational changes between fully extended ( ON state) and collapsed ( OFF state) oligopeptide conformer structures. In the fully extended conformation, the biotin appended to the oligopeptide is largely free from steric factors allowing it to efficiently bind to the neutravidin from solution. While under a collapsed conformation, the ligand presented at the surface is partially embedded in the second component of the mixed SAM, and thus sterically shielded and inaccessible for neutravidin binding. Steric hindrances aroused from the neighboring surface-confined oligopeptide chains exert a great influence over the conformational behaviour of the oligopeptides, and as a consequence, over the switching efficiency. Our results also highlight the role of oligopeptide length in controlling binding switching efficiency. This study lays the foundation for designing and constructing dynamic surface materials with novel biological functions and capabilities, enabling their utilization in a wide variety of biological and medical applications
    corecore