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M165 fc stereomicroscope

Manufactured by Leica
Sourced in Germany, United States

The Leica M165 FC stereomicroscope is a high-performance, versatile imaging instrument. It provides a magnification range of 7.8x to 160x, enabling detailed observation and analysis of a wide variety of specimens. The M165 FC features a fully apochromatic optical system, ensuring accurate color reproduction and high-resolution imaging. Its ergonomic design and intuitive controls make it a reliable tool for various laboratory applications.

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88 protocols using m165 fc stereomicroscope

1

Conditional Dicer Knockout in Tbx18-Expressing Lineages

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Tbx18CreTg/+ mice that drive Cre recombinase expression in the peri-Wolffian duct stroma (gift from Feng Chen) [23 (link)] were bred with Dicerflx/flx mice ([24 (link)], Jackson Laboratories, Strain #00601, Bar Harbor, ME) to generate conditional knockout mice with loss of Dicer in the Tbx18-expressing lineages. Tbx18CreTg/+;Dicerflx/flx (mutant mice) were compared to littermates without the Tbx18Cre allele (controls). To detect Cre expression, Tbx18CreTg/+ mice were bred with Gt(ROSA)26Sortm9(CAG-tdTomato)hZE (CAG) mice ([25 (link)], Jackson Laboratories, Strain #007909) to generate Tbx18CreTg/+CAG offspring in which tdTomato fluorescence is expressed in lineages arising from Tbx18Cre-positive cells. Timed matings were performed; the morning a plug was observed was considered embryonic day 0.5. We detected red fluorescence from tdTomato positive mice with a Leica M165FC Stereo Microscope (Leica, Buffalo Grove, IL). DNA was isolated from tail clippings or embryonic tissue to perform polymerase chain reaction (PCR) genotyping. All animal experiments were carried out in accordance with the policies of the Institutional Animal Care and Use Committee at the University of Pittsburgh School of Medicine (Protocol #17091432). Animals were housed in the vivarium at Rangos Research Center at the UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania.
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2

Conditional Dicer Knockout in Tbx18-Expressing Lineages

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Tbx18CreTg/+ mice that drive Cre recombinase expression in the peri-Wolffian duct stroma (gift from Feng Chen) [23 (link)] were bred with Dicerflx/flx mice ([24 (link)], Jackson Laboratories, Strain #00601, Bar Harbor, ME) to generate conditional knockout mice with loss of Dicer in the Tbx18-expressing lineages. Tbx18CreTg/+;Dicerflx/flx (mutant mice) were compared to littermates without the Tbx18Cre allele (controls). To detect Cre expression, Tbx18CreTg/+ mice were bred with Gt(ROSA)26Sortm9(CAG-tdTomato)hZE (CAG) mice ([25 (link)], Jackson Laboratories, Strain #007909) to generate Tbx18CreTg/+CAG offspring in which tdTomato fluorescence is expressed in lineages arising from Tbx18Cre-positive cells. Timed matings were performed; the morning a plug was observed was considered embryonic day 0.5. We detected red fluorescence from tdTomato positive mice with a Leica M165FC Stereo Microscope (Leica, Buffalo Grove, IL). DNA was isolated from tail clippings or embryonic tissue to perform polymerase chain reaction (PCR) genotyping. All animal experiments were carried out in accordance with the policies of the Institutional Animal Care and Use Committee at the University of Pittsburgh School of Medicine (Protocol #17091432). Animals were housed in the vivarium at Rangos Research Center at the UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania.
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3

Maize Root Histological Analysis

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The root tips of maize primary roots were collected following salt treatment for 4 d and fixed in a 50% formalin-acetic acid-alcohol (FAA) fixative solution, before being embedded in paraffin as previously described (Qin et al., 2017 (link)). The paraffin sections of 10 µm thickness were prepared using a Leica RM2265 microtome (Leica Biosystems, Nussloch, Germany) and placed on glass slides. After staining with toluidine blue, the sections were observed and imaged using a Leica M165FC stereo microscope (Leica Biosystems, Nussloch GmbH, Germany).
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4

Atherosclerotic Plaque Quantification in Mice

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The procedures used were adopted from the Eitzman Lab (29 (link)). Apoe−/− mice were perfused with saline at physiological pressure and then fixed using formalin with a 25-gauge needle inserted into the left ventricle at a rate of 1 ml/min. The arterial tree was then meticulously dissected and placed in 70% ethanol. After staining with Oil Red O, the aorta was pinned on wax. Pinned aortic tissue was imaged using a SPOT camera (Spot Imaging; Sterling Heights, MI, USA) mounted to a Leica M165FC Stereomicroscope (Leica Biosystems; Nussloch, Germany). Identical settings were used for all samples. The surface area occupied by atherosclerotic plaques was quantified at the aortic arch and major branches with Image-Pro Plus software (Media Cybernetics, Bethesda, MD, USA). The lesion area was expressed as a percentage of total surface area examined.
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5

Multimodal Microscopy for Zebrafish and C. elegans

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For zebrafish, a Leica SP8 (Leica, Bannockburn, IL) laser scanning confocal microscope (LSCM) was used throughout manuscript. A HC PL APO 20x/0.75 IMM CORR CS2 objective, HC PL APO 40x/1.10 W CORR CS2 0.65 water immersion objective, and an HCX Plan Apochromat 63×/1.40–0.06 NA OIL objective were used. Images were acquired using LAS-X software. Images taken with the SP8 LSCM were obtained through lightning, a built-in deconvolution algorithm. A Leica DMi8 (Leica, Bannockburn, IL) with a X-light v2 confocal unit spinning disk was also used, equipped with an 89 North – LDI laser and a Photometrics Prime-95B camera. Optics used were either 10x/0.32 NA air objective, HC PL APO 63X/1.40 NA oil CS2, HC PL APO 40X/1.10 NA WCS2 CORR, a 40X/1.15 N.A. 19 Lamda S LWD, or 100Å~/1.4 N.A. HC Pl Apo oil emersion objective. A Leica M165 FC stereomicroscope equipped with DFC9000 GT sCMOS camera was used for phenotypic analysis of embryos.
For live cell imaging of C. elegans embryos, a spinning disk confocal system was used. The system is equipped with a Nikon Eclipse and is an inverted microscope with a 60X 1.40NA objective, a CSU-22 spinning disc system and a Photometrics EM-CCD camera from Visitech International. Images were obtained every 2 minutes with a 1-micron z-stack step size.
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6

Wholemount Confocal Imaging of Ductal Network

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For wholemount confocal imaging, samples were dissected under a Leica M165FC stereomicroscope to yield portions containing a large area of ductal network (approximately 3 mm x 3 mm). Adipose tissue was removed using dissecting scissors (Rios et al., 2014 (link)). Small pieces of tissue were cleared in 80% glycerol overnight and then covered with mounting medium.
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7

Imaging and Quantifying Hatching Gland Cells

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Images were taken using a Zeiss Confocal (LSM710 META), an AxioImager microscope (Zeiss) equipped with an Apotome, using the AxioVision software (Zeiss) or a Leica M165FC stereo microscope with DFC425C camera and the Leica Application Suite V3.8 software and processed using the ImageJ software and Adobe Photoshop. Cell shapes of hatching gland cells were determined by the shape descriptor tool in ImageJ, calculating circularity by 4π × Area/Perimeter2, and solidity by Area/Convex area.
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8

Zebrafish Embryonic Cyst Formation Analysis

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Zebrafish strains: zebrafish were maintained according to institutional and national ethical and animal welfare guidelines. All experiments were performed under UK Home Office licenses 40/3708 and 70/8588. The zebrafish lines Tg(-26wt1b:EGFP)li164 (link) and tmem33sh44343 (link) were used.
Zebrafish morpholino injections: Embryos were injected at the 1 cell stage. A morpholino complementary to the ATG region of zebrafish pkd2 was injected at 1 ng (5’-AGGACGAACGCGACTGGAGCTCATC-3’)42 (link). A concentration of 0.4 ng or 1 ng control morpholino (5’- CCTCTTACCTCAGTTACAATTTATA-3’) was injected in these experiments.
Image acquisition and analysis: Zebrafish embryos were imaged at 52–55hpf when cysts became visible, using a Leica M165FC stereo microscope and images were acquired using Leica LASX software. Images were quantified using FIJI v1.52i. Zebrafish renal phenotype analysis was double blinded.
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9

Visualizing Alzheimer's in Fly Eyes

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Eye images of 6-day-old female flies expressing Aβ under the control of the GMR-Gal4 driver at 25 °C were taken using a Leica M165 FC stereo microscope. At least 8 flies per genotype were investigated.
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10

Microscopic Analysis of Pid Mutants

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The screen for Pid mutants was performed using a Zeiss M2Bio dissecting microscope. Fluorescence images were taken on a Leica DM6000 B upright microscope with 400× amplification. Silencing onset of active transgenes was analyzed using a Leica M165 FC stereo microscope with a 1× objective (120× amplification) or a 4× objective (480× amplification).
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