Uskonnon ja luonnontieteiden vuoropuhelua uuden ajan alussa

Kirjallisuusarvostelu

Sinfonie A-dur, KV 201

Soitinnus: orkesteri.

Sinfonische Metamorphosen über Themen von C. M. von Weber

Soitinnus: orkesteri.

Ein Heldenleben op. 40

Soitinnus: orkesteri.

Michelson interferometer with porch swing bearing for portable FTIR spectrometer

The interferometer for low resolution portable Fourier Transform middle infrared spectrometer was developed and studied experimentally. The final aim was a concept for a commercial prototype. Because of the portability, the interferometer should be compact sized and insensitive to the external temperature variations and mechanical vibrations. To minimise the size and manufacturing costs, Michelson interferometer based on plane mirrors and porch swing bearing was selected and no dynamic alignment system was applied. The driving motor was a linear voice coil actuator to avoid mechanical contact of the moving parts. The driving capability for low mirror driving velocities required by the photoacoustic detectors was studied. In total, four versions of such an interferometer were built and experimentally studied. The thermal stability during the external temperature variations and the alignment stability over the mirror travel were measured using the modulation depth of the wide diameter laser beam. Method for estimating the mirror tilt angle from the modulation depth was developed to take account the effect from the non-uniform intensity distribution of the laser beam. The spectrometer stability was finally studied also using the infrared radiation. The latest interferometer was assembled for the middle infrared spectrometer with spectral range from 750 cm−1 to 4500 cm−1. The interferometer size was (197 × 95 × 79) mm3 with the beam diameter of 25 mm. The alignment stability as the change of the tilt angle over the mirror travel of 3 mm was 5 μrad, which decreases the modulation depth only about 0.7 percent in infrared at 3000 cm−1. During the temperature raise, the modulation depth at 3000 cm−1 changed about 1 . . . 2 percentage units per Celsius over short term and even less than 0.2 percentage units per Celsius over the total temperature raise of 30 °C. The unapodised spectral resolution was 4 cm−1 limited by the aperture size. The best achieved signal to noise ratio was about 38 000:1 with commercially available DLaTGS detector. Although the vibration sensitivity requires still improving, the interferometer performed, as a whole, very well and could be further developed to conform all the requirements of the portable and stable spectrometer.

Aatelisnaisten vaikutusmahdollisuudet 1800-luvulla

Kirjallisuusarvostelu

Metsäperkeleen prinssistä Mäntän kuninkaaksi

Kirjallisuusarvostelu

Sylloge monumentorum, ad illustrandam historiam Fennicam pertinentium 4

Painovuosi nimekkeestä.

Modulation of TGF-β signaling by Hypoxia

A tumor is a fast-growing malignant tissue. This creates areas inside the tumor that are distant from local blood vessels to be able to get enough oxygen. This hypoxic condition activates a transcription factor called hypoxia inducible factor (HIF). HIF responses help a cell to adapt to decreased oxygen by activating glycolytic and angiogenesis pathways and by regulating apoptotic responses. Hypoxia drives the upregulation of a growth factor called transforming growth factor beta (TGF-beta). Similar to a hypoxia response, TGF is an important regulator of cell fate. TGF-β and HIF pathways regulate partially overlapping target genes. This regulation can also be cooperative. The TGF-beta signal is initiated by activation of plasma membrane receptors that then activate effector proteins called small mothers against decapentaplegic (Smad) homologs. In healthy tissue, TGF-β keeps cell proliferation and growth under control. During cancer progression, TGF-beta has shown a dual role, whereby it inhibits initial tumor formation but, conversely, in an existent tumor, TGF-beta drives malignant progression. Along with HIF and TGF-beta also protein dephosphorylation is an important regulatory mechanism of cell fate. Protein dephosphorylation is catalyzed by protein phosphatases such as Protein phosphatase 2A (PP2A). PP2A is a ubiquitous phosphatase that can exist in various active forms. PP2A can specifically regulate TGF-beta signaling either by enhancing or inhibiting the receptor activity. This work demonstrates that during hypoxia, PP2A is able to fine-tune TGF-beta signal by specifically targeting Smad3 effector in a Smad7-dependent manner. Inactivation of Smad3 in hypoxia leads to malignant conversion of TGF-beta signaling.

Yxi vähä suomenkielinen wirsikiria, suomencocouxis Jumalata kijttä suomenkielellä, tehty m. Jacobilda Suomalaiselda, ja muild Suomen papeilda. Cunnjalisten herrain Turun pispan m. Erichin, ja capitularesten tiedhost ja suosjost, H. Hemmingin Maschun kirckoherran vaevall ja culutuxell, ensins präntätty Stocholmisa. Mutta nyt Herman Sulkin käskyst, Staffan Myllärin präntill uudhistettu Rostochis.

Koonnut ja suomentanut Jacobus Finno, täydentänyt Hemminki Henrikinpoika Maskulainen. Useilla lehdillä numerointivirheitä, numerointi: [6], 1-62 93 [po. 63] 64-94 94 [po. 95] 96-161 192 [po. 162] 163-180 161 [po. 181] 182-223, [5]. - Lehtien 197 ja 198 sivut painettu väärään järjestykseen. Viimeisellä sivulla oikolukijan jälkisanat, allekirjoitus S. I. C. S. = Simon Johannis Carelius. Arkit: A-T12 V6. Puuttuu kansalliskokoelmasta.