605 research outputs found

    Upaya Meningkatkan Hasil Belajar Siswa pada Pembelajaran Biologi melalui Pemanfaatan Perangkat Pembelajaran dengan Model Problem Basic Learning

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    Pelaksanaan pembelajaran Biologi di SMP Muhammadiyah 2 Mlati memerlukan perangkat pembelajaran yang memadai untuk mendukung proses pembelajaran di kelas. Perangkat pembelajaran makanan dan sistem pencernaan makanan berdasarkan model pembelajaran berbasis masalah yang meliputi: (1) bahan ajar, panduan guru dan panduan siswa, rencana pelaksanaan pembelajaran (RPP), lembar kerja siswa (LKS), tes hasil belajar (THB). Penelitian ini merupakan Penelitian Tindakan Kelas (PTK) yaitu suatu bentuk penelitian yang bersifat reflektif dengan melakukan tindakan-tindakan tertentu agar dapat memperbaiki dan meningkatkan kualitas pembelajaran di kelas secara lebih professional. Hasil dari penelitian: Nilai rata-rata dari pra tindakan hingga pelaksanaan siklus I dan siklus 2 selalu mengalami peningkatan

    Rare Earth Element Recovery from Phosphogypsum using a Biolixiviant

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    This project describes the process of recovering of rare earth elements (REE) from phosphogypsum (PG) waste using a novel biolixviant produced by a bacteria strain known as Glucanobacter oxydans and is inspired by novel research occurring at Idaho National Laboratories. This report details design of a plant which has the capacity to produce the biolixiviant through fermentation, use this biolixiviant to leach REE from a solid waste such as PG, and recover the REE in oxide form through crystallization, filtration, and subsequent high temperature decomposition. The plant has the capability of processing nearly 1 million MT of PG a year and yields 286,000 kg of a rare earth oxide (REO) mixture, valued at approximately 9perkg.Asitstands,thisprocessisunprofitable:ithasanegativeinternalrateofreturnafter15yearsofproductionandhasaNPVofnegative9 per kg. As it stands, this process is unprofitable: it has a negative internal rate of return after 15 years of production and has a NPV of negative 147,664,900. In its third year of production, operating at 91% capacity, the plant has a -21.17% ROI. An alternative design is considered where fermentation is cut and H2SO4 is the lixiviant, removing 79% of the original capital necessary to create the plant. Though still negative, the IRR/ROI are much more sensitive to changes in product price, thus opening a potential path to profitability in the near future as prices are expected to increase

    Prion decontamination method

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    Autoklaviranje je metoda najčešće primjenjivana za dekontaminaciju priona, sama ili u kombinaciji s NaOH ili drugim kemijskim reagencijama. Naša metoda autoklaviranja u 0,1N NaOH pri temperaturi od 134 °C, kroz 18 minuta je neškodljiva za instrumente i okolinu, pouzdanija od prijedloga Svjetske Zdravstvene Organizacije (bez NaOH ) koja se danas primjenjuje u većini evropskih zemalja (Velika Britanija 1986., Švicarska 2003.). Naša metoda je jednostavno izvediva a troškovi dekontaminacije su mali. Uspjeh je ovisan o postupku s instrumentima neposredno nakon uporabe, da bi se spriječilo sušenje; osušene instrumente više nije moguće dekontaminirati. Tako se danas radi u većini bolnica na svijetu, a moguće je to izbjeći uranjanjem instrumenata neposredno nakon uporabe u autoklavabilne posude iz polipropilena (pp) u kojima je 0,1N NaOH (ili druge kemikalije). Na kraju rada, instrumenti se ručno, prenesu u autoklav zajedno s tekućinom u koju su uronjeni. Proces autoklaviranja traje 2,5–3 sata. Na kraju se i pp posude, složene jedna u drugu, autoklaviraju na jednaki način i osuše za slijedeći radni dan.Autoclaving is the method most frequently used for the decontamination of prion infected medical devices alone or in combination with NaOH or chemicals. Our proposal is the simultaneous autoclaving in 0.1N NaOH for 18 minutes at 134 °C; it is considerably more rigorous than autoclaving in water or in porous autoclaves under identical pressure conditions as practiced in Europe (first Great Britain 1986, Swiss law 2003). It is less harmful as 1N solution and completely harmless for the environement and autoclave including the lowest costs for the hospital. Devices must immediately immersed in 0.1N NaOH (or other) contained in autoclavable polypropylene pans (pp) to avoid dessication. Dried instruments cannot be decontaminated. Instruments are then manually transferred to the autoclave (together with the fluid) to immerse instruments. Autoclaving process is for 2.5-3 hours. Finally, pans can also be autoclaved (stapled) under the same condition

    Prognosis of Acute Ischaemic Stroke Patients with Cancer : A National Inpatient Sample Study

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    Acknowledgments: We thank Jesus Perdomo-Lampignano, MB ChB for his assistance with the figures. We also acknowledge the HCUP Data Partners (https://www.hcup-s.ahrq.gov/db/hcupdatapartners. jsp—accessed on 30 January 2021)Peer reviewedPublisher PD

    In-hospital Outcomes of Acute Ischaemic Stroke Patients with Atrial Septal Defect. : A National Inpatient Sample Study.

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    Acknowledgements We would like to acknowledge the HCUP Data Partners (https://www.hcup10 us.ahrq.gov/db/hcupdatapartners.jsp). Sources of Funding FC received the Leslie Wilson Endowed Scholarship as a part of the Aberdeen Summer Research Scholarship Programme of the Aberdeen Clinical Academic Training (ACAT) Pathways. The Leslie Wilson Endowed Scholarship is funded by Department of Medicine for the Elderly, NHS Grampian.Peer reviewedPostprin

    Синтез и исследование новых комплексных соединений нитратов редкоземельных элементов с N-метилгликолурилами

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    A series of new complex compounds of nitrates of trivalent rare earth elements (lanthanum, cerium, praseodymium, neodymium, samarium, terbium, dysprosium, erbium, ytterbium) with bicyclic bisureas – N-methylglycolurils (N-monomethylglycoluryl, 2,4-N-dimethylglycoluryl, 2,6-N-dimethylglycoluryl, 2,4,6,8-N-tetramethylglycoluryl) as ligands were obtained. IR spectroscopy showed that the rare earth elements (REE) ions are coordinated by two oxygen atoms of two N-methylglycoluryl molecules, three bidentate nitrate anions, and water molecules. N-methylglycolurils realize bidentate, chelating, and bridging functions and tend to form binuclear complexes with rare earth elements. Mass spectrometry with an inductively coupled plasma of synthesized complexes was carried out, and the metal:ligand ratio was ~1:1, respectively. Powder X-ray diffraction allowed us to establish the structures of complex compounds of 2,4,6,8-N-tetramethylglycoluryl with cerium, neodymium, terbium, and dysprosium nitrates. NMR spectroscopy of the obtained complexes was also performed in DMSO-d6 to detect a complex particle in the solution. The resulting complexes are stable in air, however, they are sensitive to trace amounts of water in the solution and are prone to degradation into their original substances

    Sex differences in stroke mortality in Thailand : a National cohort study.

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    Acknowledgements AA : primary author, drafting manuscript. TAP : statistical analysis and supervision. ST : data acquisition of Thai data, data interpretation. KS : data acquisition of Thai data, data interpretation. NK : data acquisition of Thai data, data interpretation. MAM : supervision, critical revision. PKM : supervision, senior author critical revision. PKM is the guarantor.Peer reviewedPostprin

    Country-level determinants of the severity of the first global wave of the COVID-19 pandemic : an ecological study

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    Acknowledgements We would like to thank Dr Kathryn Martin, who provided valuable advice in study design. Funding This work was supported by the Aberdeen Clinical Academic Training Scheme.Peer reviewedPublisher PD
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