Media can only be downloaded from the desktop version of this website. Share Leave a comment MIT researchers have built an ingestible sensor equipped with genetically engineered bacteria that can diagnose bleeding in the stomach or other gastrointestinal problems.
Galileo was one of the first spacecraft to be equipped with a CCD camera. Light was collected by the primary mirror and directed to a smaller secondary mirror that channeled it through a hole in the center of the primary mirror and onto the CCD.
The CCD sensor was shielded from radiationa particular problem within the harsh Jovian magnetosphere. An eight-position filter wheel was used to obtain images at specific wavelengths. The images were then combined electronically on Earth to produce color images.
The spectral response of the SSI ranged from about 0. The SSI weighed The spectrometer of NIMS used a grating to disperse the light collected by the telescope. The dispersed spectrum of light was focused on detectors of indiumantimonide and silicon.
This light then passed through an exit slit into photomultiplier tubes that produced pulses or "sprays" of electrons. These electron pulses were counted, and these count numbers constituted the data that were sent to Earth. The UVS was mounted on Galileo's scan platform and could be pointed to an object in inertial space.
The EUV was mounted on the spun section. As Galileo rotated, EUV observed a narrow ribbon of space perpendicular to the spin axis. The two instruments combined weighed about 9. One of these used no filters and observed all incoming radiation, both solar and thermal.
Another band allowed only solar radiation through. The difference between the solar-plus-thermal and the solar-only channels gave the total thermal radiation emitted. The PPR also measured in five broadband channels that spanned the spectral range from 17 to micrometers.
The radiometer provided data on the temperatures of Jupiter's atmosphere and satellites. The design of the instrument was based on that of an instrument flown on the Pioneer Venus spacecraft. The PPR weighed 5. The speed of these small particles could be measured over the range of 1 to 70 kilometers per second 0.
The instrument could measure impact rates from 1 particle per days 10 megaseconds to particles per second. Such data was used to help determine dust origin and dynamics within the magnetosphere. The DDS weighed 4. The EPD could also measure the direction of travel of such particles and, in the case of ions, could determine their composition whether the ion is oxygen or sulfurfor example.
The EPD used silicon solid-state detectors and a time-of-flight detector system to measure changes in the energetic particle population at Jupiter as a function of position and time. These measurements helped determine how the particles got their energy and how they were transported through Jupiter's magnetosphere.
The EPD weighed The HIC detected heavy ions using stacks of single crystal silicon wafers. This range included all atomic substances between carbon and nickel. The HIC weighed 8. The three sensors allowed the three orthogonal components of the magnetic field section to be measured.
The second set, designed to detect stronger fields, was 6. The boom was used to remove the MAG from the immediate vicinity of Galileo to minimize magnetic effects from the spacecraft.
However, not all these effects could be eliminated by distancing the instrument. The rotation of the spacecraft was used to separate natural magnetic fields from engineering-induced fields. Another source of potential error in measurement came from the bending and twisting of the long magnetometer boom.
To account for these motions, a calibration coil was mounted rigidly on the spacecraft to generate a reference magnetic field during calibrations. The MAG experiment weighed 7.
The rotation of the spacecraft carried each field of view through a full circle.This "bacteria-on-a-chip" approach combines sensors made from living cells with ultra-low-power electronics that convert the bacterial response into a wireless signal that can be read by a smartphone. Ashley Angelo joined Veterinary Cardiology Consultants in She is a veterinary assistant with extensive experience in cardiology.
Ashley attended Wayne State University and . Researchers have created a “lab on a chip” that could become a clinical tool capable of detecting quantities of disease-causing bacteria.
The chip sensitivity with immobilized bacteria is governed by height of sensing chamber, and ∼10 4 CFU mL −1 of E.
coli could easily be detected when a shallower chamber (2 μm high) was used. The selectivity of the sensor was tested using a suspension of two bacterial strains, E. coli and M. catarrhalis. An app then counts the bacteria present on the chip – it can detect as few as bacteria cells per 1 milliliter of solution.
Results are obtained in under two hours. At last, I find the reason.
Because there is one more tab at the end of the segmentation file, so that the software can't not recognize the content.