PRODUKSI DAN KARAKTERISASI NANOSERAT SELULOSA ASETAT DENGAN METODE ELEKTROSPINING

In this research, cellulose acetate fiber was produced by electrospinning method. Cellulose acetate was dissolved with acetone solvent and then putin to a cooling system torestrain the rate of evaporation of cellulose acetate. The conductivity and evaporation rate of the cellulose acetate solution were tested, and the cellulose acetate fiber sproduced were tested using scanning electron microscopy (SEM). The conductivity of the cellulose acetate solutionwas 3.45 S/cm at 15oC and almost doubled at 22oC. The cooling system test was ableto maintain the temperature of the cellulose acetate solution at 15 oC for approximately 2 minutes. In addition, bead fibers are produced due to their low conductivity

Skateboard Injuries in a Campus Community

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67018/2/10.1177_000992286700600421.pd

MODIFIKASI KOPOLIMER KARET ALAM SIKLIS GRAFTING ASAM OLEAT MENGGUNAKAN INISIATOR BENZOIL PEROKSIDA DAN BAHAN PENGISI BENTONIT-CETIL TRIMETIL AMONIUM BROMIDA

Research on the modification of Cyclic Natural Rubber (CNR) grafting Oleic Acid (OA) copolymer using initiator of Benzoyl Peroxide (BPO) and the filler of bentonite-Cetil Trimethyl Ammonium Bromide (CTAB) has been carried out, which aims to determine the method of modifying Cyclic Natural Rubber (CNR) and Oleic Acid (OA) so it can produce CNR-g-OA copolymer through grafting method with BPO initiator mixed together with bentonite-CTAB. This research was conducted in three stages. The first stage is the process of dissolving CNR using xylene. The second stage is the process of mixing CNR solution and OA with the composition (70:30) phr, followed by the addition of BPO initiator and bentonite-CTAB filler. The third stage is characterization using FTIR and Scanning Electron Microscopy (SEM). The results of the analysis using FT-IR showed an absorption at 1708,23 cm-1 which indicated the presence of C=O bonds from oleic acid which had been grafted on CNR, and increased intensity after addition of bentonite-CTAB at 1568,96 cm-1; 1446,13 cm-1; 1255,66 cm-1; and 866,94 cm-1. Characterization results using SEM showed that the mixing of Bentonite-CTAB in KAS-g-OA was evenly distributed and quite homogeneous

PENGOLAHAN LIMBAH KULIT KAKAO DAN KEMIRI PADA PEMBUATAN BIOPELET SEBAGAI BAHAN BAKAR ALTERNATIF

The amount of fuel reserves were getting depleted and has created problems with the occurrence of a fuel crisis, which has resulted in higher prices and the economy of the community has been down. Biomass is a renewable alternative fuel source but still has weaknesses, like high water content, low calorific value and low density and the combustion process requires high temperatures. To overcome this problem, biomass can be processed into biopellets with the aim of increasing its density and increasing the quality of combustion. The research was about the processing of cocoa and candlenut shell waste as an alternative fuel in the manufacture of biopellets using tapioca adhesive. The stages of this research include the preparation of raw materials for cocoa shells and candlenut shells ground to a size of 60 mesh and then added with various adhesives of 5%, 10% and 15%, then printed manually and dried in an oven with a temperature of 60oC for ±3 hours. Furthermore, the biopellets were characterized based on the provisions of SNI 8021:2014 which included density, moisture content, ash content, volatile matter, fixed carbon, calorific value with the most optimum values, respectively, 1.02 g/cm3, 3.14%, 6 ,25%, 64.56%, 26.05% and 4145.6 cal/g. Biopellets were also tested for effectiveness such as fracture strength and combustion rates with values of 0.14% and 0.11 g/min, respectively. Biopellet with the best quality was found in the type of biopellet with a mixture of raw materials 2:1 and using 10% tapioca adhesive

Development and Pilot of a Checklist for Management of Acute Liver Failure in the Intensive Care Unit

Introduction Acute liver failure (ALF) is an ideal condition for use of a checklist. Our aims were to develop a checklist for the management of ALF in the intensive care unit (ICU) and assess the usability of the checklist among multiple providers. Methods The initial checklist was developed from published guidelines and expert opinion. The checklist underwent pilot testing at 11 academic liver transplant centers in the US and Canada. An anonymous, written survey was used to assess the usability and quality of the checklist. Written comments were used to improve the checklist following the pilot testing period. Results We received 81 surveys involving the management of 116 patients during the pilot testing period. The overall quality of the checklist was judged to be above average to excellent by 94% of users. On a 5-point Likert scale, the majority of survey respondents agreed or agreed strongly with the following checklist characteristics: the checklist was easy to read (99% agreed/agreed strongly), easy to use (97%), items are categorized logically (98%), time to complete the checklist did not interfere with delivery of appropriate and safe patient care (94%) and was not excessively burdensome (92%), the checklist allowed the user the freedom to use his or her clinical judgment (80%), it is a useful tool in the management of acute liver failure (98%). Web-based and mobile apps were developed for use of the checklist at the point of care. Conclusion The checklist for the management of ALF in the ICU was shown in this pilot study to be easy to use, helpful and accepted by a wide variety of practitioners at multiple sites in the US and Canada

Promoting a world of moral relatives. A challenge for the scientific community

Living in a world of «moral strangers» Over and over again, we are told and agree that, although there is no serious lack of moral conviction and orientation in our cultural communities, we are confronted with a plethora of competing moral positions and ethical endeavours. While in urgent need of commonly mastering vital problems in various fields of shared interest, we seem to be living together as «moral strangers» with no chance of constructing a sufficiently detailed value system and ensu..

Nutritive value of rhodes grass at different growth stages for ruminant production

The nutritive value of Rhodes grass (chloris gayana) at different levels of growth, with minimum fertilisation was studied. Nutritive value is in reference to the chemical composition and digestibility of the grass. The grass was harvested at eight growth stages with respect to time after seedling emergence and height of plants above ground; with the first to last harvests being done at 12cm, 20cm, 30cm, 45cm, 60cm and on average >70cm for the sixth, seventh and eighth harvests. Proximate analysis for the samples showed a steady decline in CP from 8.61% at 4 weeks old to 2.83% at 15 weeks when it was cut as hay at eighth harvest. CF increased from 32.34% at initial harvest to 42.03% during the eighth harvest. This reciprocal relationship between CF and CP agreed with previous reports. DM yield increased from 1.75tonnes per hectare at initial harvest to 14.5t/ha at eighth harvest. Invitro OMD also indicated a steady fall from 75.52% at harvest level one, to 54.1% for the eighth. The drop in CP and OMD, rise in CF were attributed to the increase in lignin content of the grass. Invivo OMD was estimated for the eighth harvest level (62.82%) and compared to the laboratory invitro method. The former was higher than the latter which contrasted with earlier reports. Invivo digestibilities for OM, DM, CF and GE were consistent with other figures reported. The analysis helped to determine how much a ruminant animal would obtain in terms of nutrients at each harvest level. It was concluded that the optimum cutting stage would be at 45-60 CJ