Kajian Pertumbuhan Chlorella SP. Pada Limbah Cair Industri Susu

Chlorella sp dikenal sebagai mikroalga yang mampu hidup di berbagai badan air, termasuk badan airpenampung limbah cair. Kajian ini dilakukan dengan tujuan untuk mengetahui kemampuan adaptasiChlorella sp pada limbah cair industri susu, yang jika terurai menghasilkan nutrien untuk pertumbuhanChlorella sp. Kajian dilakukan dengan memelihara Chlorella sp pada media F/2 Guallard, limbah cairindustri susu (LS) dan limbah cair industri susu yang diperkaya dengan nitrogen setara nitrogendalam F/2 (LSP). Kajian ini mengungkapkan bahwa Chlorella sp tumbuh paling baik di media limbahsusu yang diperkaya dengan nitrogen setara F/2. Media tersebut (LSP) menghasilkan kepadatan dankonsentrasi Chl-a, serta kandungan Chl-a per individu Chlorella sp yang lebih tinggi daripada mediaF/2 dan LS. Mengingat limbah susu yang tidak diolah dengan baik dapat menimbulkan pencemaranbagi lingkungan perairan sekitar industri itu berada, maka perlu dipertimbangkan kemungkinanpemanfaatan Chlorella sp pada pengolahan limbah industri susu di tingkat lanjutan, sebelum limbahdibuang ke badan air

Direct measurement of quasiparticle-lifetime broadening in a strong-coupled superconductor

We have measured the quasiparticle recombination time in the strong-coupled superconductor Pb0.9Bi0.1 directly by measuring the lifetime-broadened energy gap edge. This is done by measuring the I-V characteristics of a superconducting tunnel junction of the type Pb0.9Bi0.1-insulator-Pb0.9Bi0.1. Agreement with the calculated value is excellent

Measurements of the time-dependent specific heat of amorphous materials

The time dependence of the specific heat of several amorphous materials, such as a-SiO2, a-As2S3, and a-As, has been studied in the temperature range 0.1-1 K. It is found that below 0.3 K in all the materials studied the short-time specific heat at about 10 μsec is considerably smaller than the long-time specific heat, but larger than the Debye value. Above 0.3 K most of the specific heat is coupled to the phonons already at 10 μsec. However, measurements at very long time scales reveal that the specific heat has a component with a logarithmic time dependence, as proposed by the tunneling model, although only part of the total specific heat can be ascribed to it

Strategies for Controlled Placement of Nanoscale Building Blocks

The capability of placing individual nanoscale building blocks on exact substrate locations in a controlled manner is one of the key requirements to realize future electronic, optical, and magnetic devices and sensors that are composed of such blocks. This article reviews some important advances in the strategies for controlled placement of nanoscale building blocks. In particular, we will overview template assisted placement that utilizes physical, molecular, or electrostatic templates, DNA-programmed assembly, placement using dielectrophoresis, approaches for non-close-packed assembly of spherical particles, and recent development of focused placement schemes including electrostatic funneling, focused placement via molecular gradient patterns, electrodynamic focusing of charged aerosols, and others

Observation of a new superconducting state at high quasiparticle injection

The behavior of a superconducting A1 film under conditions of large nonequilibrium injection of quasiparticles is studied by means of a tunnel generator and detector. At a critical injection density, nc, a second energy gap develops in the superconductor. The relevance to recent theories of nonequilibrium superconductivity is discussed

PREPARATION OF LOW CONCENTRATION HIGH MOBILITY n AND p-PbTe

Nous donnons le résultat de l'utilisation de certaines techniques de croissance et de recuit pour la préparation du PbTe de types n et p. Il a été possible de préparer du PbTe intrinsèque à la température ordinaire. Des mobilités maximums de 4,7 × 106et 2,8 × 106 cm2 V-1 sec.-1 ont été observées dans les matériaux n et p respectivement.We report the result of some growth and annealing techniques in the preparation of n and p-PbTe. PbTe has been grown which is intrinsic at room temperature. Maximums mobilities of 4.7 × 106 and 2.8 × 106 cm2/V × sec have been observed in n and p materials, respectively

The time dependent specific heat of dielectric glasses

Measurements on the time dependence of the specific heat exist now both at short and long timescales. Below 0.3 K the short time (~10 µs) specific heat of all the materials studied is smaller than the long time specific heat, but larger than the Debye value. Above 0.2 K most of the specific heat is coupled to the phonons already at 10 µs. However, measurements at very long timescales reveal that the specific heat has a component with a logarithmic time dependence, as proposed by the tunneling model, although only part of the total specific heat can be ascribed to it