Additional information about design of technical systems:Properly operating chemical fume hood designed for hazardous chemicals and having an average face velocity of at least 100 feet per minute.Control parametersComponents with limit values that require monitoring at the workplace:None.Additional information: No dataExposure controlsPersonal protective equipmentFollow typical protective and hygienic practices for handling chemicals.Keep away from foodstuffs, beverages and feed.Remove all soiled and contaminated clothing immediately.Wash hands before breaks and at the end of work.Maintain an ergonomically appropriate working environment.Breathing equipment:Use suitable respirator when high concentrations are present.Recommended filter device for short term use:Use a respirator with type N95 (USA) or PE (EN 143) cartridges as a backup to engineering controls. Risk assessment should be performed to determine if air-purifying respirators are appropriate. Only use equipment tested and approved under appropriate government standards.Protection of hands: Impervious glovesInspect gloves prior to use.Suitability of gloves should be determined both by material and quality, the latter of which may vary by manufacturer.Material of glovesNitrile rubber, NBRPenetration time of glove material (in minutes): No data availableEye protection: Safety glassesBody protection: Protective work clothing.

Classification of the substance or mixtureClassification according to Regulation (EC) No 1272/2008The substance is not classified ashazardous to health or the environment according to the CLP regulation.Classification according to Directive 67/548/EEC or Directive 1999/45/ECR31: Contact with acids liberates toxic gas.Information concerning particular hazards for human and environment:N/AHazards not otherwise classifiedNo data availableLabel elementsLabelling according to Regulation (EC) No 1272/2008N/AHazard pictogramsN/ASignal wordN/AHazard statementsN/AWHMIS classificationNot controlledClassification systemHMIS ratings (scale 0-4)(Hazardous Materials Identification System) HEALTH FIRE REACTIVITY10 1Health (acute effects) = 1Flammability = 0Physical Hazard = 1Other hazardsResults of PBT and vPvB assessmentPBT:N/AvPvB:N/A

UN-NumberDOT, ADN, IMDG, IATAN/AUN proper shipping nameDOT, ADN, IMDG, IATAN/ATransport hazard class(es)DOT, ADR, ADN, IMDG, IATAClassN/APacking groupDOT, IMDG, IATAN/AEnvironmental hazards:N/ASpecial precautions for userN/ATransport in bulk according to Annex II of MARPOL73/78 and the IBC CodeN/ATransport/Additional information:DOTMarine Pollutant (DOT):No

See more Zinc products. Zinc (atomic symbol: Zn, atomic number: 30) is a Block D, Group 12, Period 4 element with an atomic weight of 65.38. The number of electrons in each of zinc's shells is 2, 8, 18, 2, and its electron configuration is [Ar] 3d10 4s2. The zinc atom has a radius of 134 pm and a Van der Waals radius of 210 pm. Zinc was discovered by Indian metallurgists prior to 1000 BC and first recognized as a unique element by Rasaratna Samuccaya in 800. Zinc was first isolated by Andreas Marggraf in 1746. In its elemental form, zinc has a silver-gray appearance. It is brittle at ordinary temperatures but malleable at 100 °C to 150 °C. It is a fair conductor of electricity, and burns in air at high red producing white clouds of the oxide. Zinc is mined from sulfidic ore deposits. It is the 24th most abundant element in the earth's crust and the fourth most common metal in use (after iron, aluminum, and copper). The name zinc originates from the German word "zin," meaning tin.

“In this multi-disciplinary approach, we managed to harness our ability to rapidly prototype complex microrobotic mechanisms that we have developed over the past decade to provide clinicians with a non-disruptive solution that could allow them to advance the possibilities of minimally invasive surgeries in the human body with life-altering or potentially life-saving impact,” said senior author Wood.

Safety, health and environmental regulations/legislation specific for the substance or mixtureNational regulationsAll components of this product are listed in the U.S. Environmental Protection Agency Toxic Substances Control Act Chemical substance Inventory.All components of this product are listed on the Canadian Domestic Substances List (DSL).SARA Section 313 (specific toxic chemical listings)1314-98-3 Zinc sulfideCalifornia Proposition 65Prop 65 - Chemicals known to cause cancerSubstance is not listed.Prop 65 - Developmental toxicitySubstance is not listed.Prop 65 - Developmental toxicity, femaleSubstance is not listed.Prop 65 - Developmental toxicity, maleSubstance is not listed.Information about limitation of use:For use only by technically qualified individuals.Other regulations, limitations and prohibitive regulationsSubstance of Very High Concern (SVHC) according to the REACH Regulations (EC) No. 1907/2006.Substance is not listed.The conditions of restrictions according to Article 67 and Annex XVII of the Regulation (EC) No 1907/2006 (REACH) for the manufacturing, placing on the market and use must be observed.Substance is not listed.Annex XIV of the REACH Regulations (requiring Authorisation for use)Substance is not listed.REACH - Pre-registered substancesSubstance is listed.Chemical safety assessment:A Chemical Safety Assessment has not been carried out.

J Huang · 2023 · 10 — Article Navigation. Research Article| March 15 2023 ... Linearly polarized light emission from GaN micro- ... Jinpeng Huang. ORCID logo 0000-0001-6007-0447.

“To enable minimally invasive laser surgery inside the body, we devised a microrobotic approach that allows us to precisely direct a laser beam at small target sites in complex patterns within an anatomical area of interest,” said York, the first and corresponding author on the study and a postdoctoral fellow on Wood’s microrobotics team. “With its large range of articulation, minimal footprint, and fast and precise action, this laser-steering end-effector has great potential to enhance surgical capabilities simply by being added to existing endoscopic devices in a plug-and-play fashion.”

Product Number: All applicable American Elements product codes, e.g. ZN-S-02-C , ZN-S-03-C , ZN-S-04-C , ZN-S-05-C , ZN-S-01-PD.GRN , ZN-S-01-PD.BLUE

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When sending a collimated beam into the condenser the light will be focused onto the sample plane (green ray). In this case the sample plane will be conjugate ...

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Wood’s microrobotics team together with technology translation experts at the Wyss Institute have patented their approach and are now further de-risking their medical technology (MedTech) as an add-on for surgical endoscopes.

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Information on toxicological effectsAcute toxicity:The Registry of Toxic Effects of Chemical Substances (RTECS) contains acute toxicity data for this substance.LD/LC50 values that are relevant for classification:Oral LD30 >2 gm/kg (rat)Dermal LD50 >2 gm/kg (rat)Skin irritation or corrosion: May cause irritationEye irritation or corrosion: May cause irritationSensitization: No sensitizing effects known.Germ cell mutagenicity: No effects known.Carcinogenicity:EPA-D: Not classifiable as to human carcinogenicity: inadequate human and animal evidence of carcinogenicity or no data are available.EPA-I: Data are inadequate for an assessment of human carcinogenic potential.EPA-II: Inadequate information to access carcinogenic potential.Reproductive toxicity: No effects known.Specific target organ system toxicity - repeated exposure: No effects known.Specific target organ system toxicity - single exposure: No effects known.Aspiration hazard: No effects known.Subacute to chronic toxicity:The Registry of Toxic Effects of Chemical Substances (RTECS) contains multiple dose toxicity data for this substance.Additional toxicological information:To the best of our knowledge the acute and chronic toxicity of this substance is not fully known.

Laser technology, which already is widely used in a number of external surgeries, such as those performed in the eye or skin, would be an attractive solution. For internal surgeries, the laser beam needs to be precisely steered, positioned and quickly repositioned at the distal end of an endoscope, which cannot be accomplished with the currently available relatively bulky technology.

Project CETI and Harvard have established a new reinforcement learning framework for rendezvous with whales using autonomous robots, combining sensing from diverse sensor streams

Personal precautions, protective equipment and emergency proceduresMount respiratory protective device.Use personal protective equipment. Keep unprotected persons away.Ensure adequate ventilationEnvironmental precautions:Do not allow material to be released to the environment without official permits.Do not allow product to enter drains, sewage systems, or other water courses.Do not allow material to penetrate the ground or soil.Methods and materials for containment and cleanup:Pick up mechanically.Prevention of secondary hazards:No special measures required.Reference to other sectionsSee Section 7 for information on safe handlingSee Section 8 for information on personal protection equipment.See Section 13 for disposal information.

Now, robotic engineers led by Robert Wood, the Charles River Professor of Engineering and Applied Sciences at the Harvard John A. Paulson School for Engineering and Applied Science (SEAS) and Wyss Associate Faculty member, and postdoctoral fellow Peter York, have developed a laser-steering microrobot in a miniaturized 6x16 millimeter package that operates with high speed and precision, and can be integrated with existing endoscopic tools. Their approach, reported in Science Robotics, could help significantly enhance the capabilities of numerous minimally invasive surgeries.

Aug 10, 2024 — What are the three main parts of the lens? · Optical Elements: Glass elements inside the camera lens direct light toward the sensor. · Aperture ...

See more Sulfur products. Sulfur (or Sulphur) (atomic symbol: S, atomic number: 16) is a Block P, Group 16, Period 3 element with an atomic radius of 32.066. The number of electrons in each of Sulfur's shells is 2, 8, 6 and its electron configuration is [Ne] 3s2 3p4. In its elemental form, sulfur has a light yellow appearance. The sulfur atom has a covalent radius of 105 pm and a Van der Waals radius of 180 pm. In nature, sulfur can be found in hot springs, meteorites, volcanoes, and as galena, gypsum, and epsom salts. Sulfur has been known since ancient times but was not accepted as an element until 1777, when Antoine Lavoisier helped to convince the scientific community that it was an element and not a compound.

The team needed to overcome the basic challenges in design, actuation, and microfabrication of the optical steering mechanism that enables tight control over the laser beam after it has exited from an optical fiber. These challenges, along with the need for speed and precision, were exacerbated by the size constraints – the entire mechanism had to be housed in a cylindrical structure with roughly the diameter of a drinking straw to be useful for endoscopic procedures.

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The meaning of HAND LENS is a magnifying glass to be held in the hand.

Hierarchical assembly of urchin-like alpha-iron oxide hollow microspheres and molybdenum disulphide nanosheets for ethanol gas sensing.

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Minimally invasive surgeries in which surgeons gain access to internal tissues through natural orifices or small external excisions are common practice in medicine. They are performed for problems as diverse as delivering stents through catheters, treating abdominal complications, and performing transnasal operations at the skull base in patients with neurological conditions.

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To determine which laser safety window to buy, refer to the following criteria: 1) Wavelength of the laser. 2) Level of Protection.

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Information on basic physical and chemical propertiesAppearance:Form: Solid in various formsColor: WhiteOdor: OdorlessOdor threshold: No data available.pH: N/AMelting point/Melting range: 1700 °C (3092 °F)Boiling point/Boiling range: No data availableSublimation temperature / start: No data availableFlammability (solid, gas): No data available.Ignition temperature: No data availableDecomposition temperature: No data availableAutoignition: No data available.Danger of explosion: No data available.Explosion limits:Lower: No data availableUpper: No data availableVapor pressure: N/ADensity at 20 °C (68 °F): 4.1 g/cm3 (34.215 lbs/gal)Relative density: No data available.Vapor density: N/AEvaporation rate: N/ASolubility in / Miscibility with Water at 18 °C (64 °F): 0.0069 g/lPartition coefficient (n-octanol/water): No data available.Viscosity:Dynamic: N/AKinematic: N/AOther informationNo data available

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Extinguishing mediaSuitable extinguishing agentsProduct is not flammable. Use fire-fighting measures that suit the surrounding fire.Special hazards arising from the substance or mixtureIf this product is involved in a fire, the following can be released:Sulfur oxides (SOx)Metal oxide fumeAdvice for firefightersProtective equipment:Wear self-contained respirator.Wear fully protective impervious suit.

The microrobotic laser-steering end-effector (on the right) can be used as a fitted add-on accessory for existing endoscopic systems (on the left) for use in minimally invasive surgery. Credit: Wyss Institute at Harvard University

Layered nanocomposite of zinc sulfide covered reduced graphene oxide and their implications for electrocatalytic applications.

ToxicityAquatic toxicity:No data availablePersistence and degradabilityNo data availableBioaccumulative potentialNo data availableMobility in soilNo data availableAdditional ecological information:Do not allow material to be released to the environment without official permits.Do not allow undiluted product or large quantities to reach groundwater, water courses, or sewage systems.Avoid transfer into the environment.Results of PBT and vPvB assessmentPBT: N/AvPvB: N/AOther adverse effectsNo data available

HandlingPrecautions for safe handlingKeep container tightly sealed.Store in cool, dry place in tightly closed containers.Ensure good ventilation at the workplace.Information about protection against explosions and fires:The product is not flammableConditions for safe storage, including any incompatibilitiesRequirements to be met by storerooms and receptacles:No special requirements.Information about storage in one common storage facility:Do not store together with acids.Store away from oxidizing agents.Further information about storage conditions:Keep container tightly sealed.Store in cool, dry conditions in well-sealed containers.Specific end use(s)No data available

The ends of devices for such surgeries are highly flexible (or “articulated”) to enable the visualization and specific manipulation of the surgical site in the target tissue. In the case of energy-delivering devices that allow surgeons to cut or dry (desiccate) tissues, and stop internal bleeds (coagulate) deep inside the body, a heat-generating energy source is added to the end of the device. However, presently available energy sources delivered via a fiber or electrode, such as radio frequency currents, have to be brought close to the target site, which limits surgical precision and can cause unwanted burns in adjacent tissue sections and smoke development.

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Safety Data Sheet according to Regulation (EC) No. 1907/2006 (REACH). The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. American Elements shall not be held liable for any damage resulting from handling or from contact with the above product. See reverse side of invoice or packing slip for additional terms and conditions of sale. COPYRIGHT 1997-2022 AMERICAN ELEMENTS. LICENSED GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY.

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“We found that for steering and re-directing the laser beam, a configuration of three small mirrors that can rapidly rotate with respect to one another in a small ‘galvanometer’ design provided a sweet spot for our miniaturization effort,” said second author Rut Peña, a mechanical engineer with micro-manufacturing expertise in Wood’s group. “To get there, we leveraged methods from our microfabrication arsenal in which modular components are laminated step-wise onto a superstructure on the millimeter scale – a highly effective fabrication process when it comes to iterating on designs quickly in search of an optimum, and delivering a robust strategy for mass-manufacturing a successful product.”

The team demonstrated that their laser-steering end-effector, miniaturized to a cylinder measuring merely 6 mm in diameter and 16 mm in length, was able to map out and follow complex trajectories in which multiple laser ablations could be performed with high speed, over a large range, and be repeated with high accuracy.

The Study of Metal Sulfide as Efficient Counter Electrodes on the Performances of CdS/CdSe/ZnS-co-sensitized Hierarchical TiO2 Sphere Quantum Dot Solar Cells.

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Zinc-doping enhanced cadmium sulfide electrochemiluminescence behavior based on Au-Cu alloy nanocrystals quenching for insulin detection.

Description of first aid measuresIf inhaled:Supply patient with fresh air. If not breathing, provide artificial respiration. Keep patient warm.Seek immediate medical advice.In case of skin contact:Immediately wash with soap and water; rinse thoroughly.Seek immediate medical advice.In case of eye contact:Rinse opened eye for several minutes under running water. Consult a physician.If swallowed:Seek medical treatment.Information for doctorMost important symptoms and effects, both acute and delayedNo data availableIndication of any immediate medical attention and special treatment neededNo data available

ReactivityContact with acids liberates toxic gas.Chemical stabilityStable under recommended storage conditions.Thermal decomposition / conditions to be avoided:Decomposition will not occur if used and stored according to specifications.Possibility of hazardous reactionsReacts with strong oxidizing agentsContact with acids liberates toxic gas.Conditions to avoidNo data availableIncompatible materials:Oxidizing agentsAcidsHazardous decomposition products:Sulfur oxides (SOx)Metal oxide fume

To further show that the device, when attached to the end of a common colonoscope, could be applied to a life-like endoscopic task, York and Peña, advised by Wyss Clinical Fellow Daniel Kent, successfully simulated the resection of polyps by navigating their device via tele-operation in a benchtop phantom tissue made of rubber. Kent also is a resident physician in general surgery at the Beth Israel Deaconess Medical Center.

Waste treatment methodsRecommendationConsult official regulations to ensure proper disposal.Uncleaned packagings:Recommendation:Disposal must be made according to official regulations.

The ULM-TILT mount provides two axes of precision angular adjustment using a stable kinematic three-point design for drift-free pointing of laser heads and ...

Formation and stability of manganese-doped ZnS quantum dot monolayers determined by QCM-D and streaming potential measurements.