Unit 3 precipitation titration || Mohr's Method|| Volhard's method || Fajan's method || AKTU

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Precipitation Titration 1. Mohr's Method a. Method b. Principle c. Limitations Keep watching. 1. Click on the below link for the Acid-Base theory https://youtu.be/-l3hIQxqo3Y 2. Click on the below link for the Alkalimetry, Acidimetry, and Acid-Base indicators. https://youtu.be/V8Vp-yMHn_Y 3. Click on the below link for Theories of Acid-Base titration 1. Ostwald's Theory 2. Quinoid Theory https://youtu.be/CVjvJsIPYGw 4. Click on the below link for Acid-Base Titration (Part 4) Neutralization Curve (Acid-Base titration indicators) 1. Strong Acid- Strong Base 2. Week Acid- Strong Base 3. Strong Acid-Week Base 4. Week Acid- Week Base https://youtu.be/W2BrKXpMRTI 5. Click on the link below for Non-aqueous Titration (Part-1) https://youtu.be/BqMWuF_5eOc 6. Click on the link below for Non-Aqueous Titration (Part-2) 1. Acidimetry 2. Alkalimetry https://youtu.be/QIoZYWcL-pQ 7.Click on the link below for Non-Aqueous Titration (Part 3) 1. Solvent effect a. Leveling effect b. Differential effect https://youtu.be/SjbtjJAOmBM If you like this video then like, share, and subscribe to my channel Ali's Classes.

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Unit 3 precipitation titration || Mohr's Method|| Volhard's method || Fajan's method || AKTU

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It is a type of quantitative analysis that involves weighing of the constituent under determination. Or It is the process of isolating and weighing an element or compound in a pure form. Or Gravimetric methods of analysis are based on the measurement of mass. Electrogravimetry, we deposit the analyte as a solid film an electrode in an electrochemical cell. Ex: The deposition as PbO2 at a Pt anode and reduction of Cu2+ to Cu at a Pt cathode is of electrogravimetry. When thermal or chemical energy is used to remove a volatile species, such method called as Volatilization gravimetry. Ex: In determining the moisture content of bread, for example, we use thermal energy to vaporize the water in the sample. Particulate gravimetry we determine the analyte by separating it from the sample’s matrix using a filtration or an extraction. The determination of total suspended solids is one example of particulate gravimetry. A gravimetric precipitating agent should react specifically, and selectively with the analyte. The ideal precipitating reagent would react with the analyte to give a product that is Readily filtered and washed free of contaminants Low solubility so that no significant loss of the solid occurs during filtration and washing Un-reactive with constituents of the atmosphere Should not alter the composition after it is dried or, if necessary, ignited.

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Arsenic is well known under desirable hand harmful due to its toxic nature, it poses the serious health hazard, which is present in medical substance, many qualitative and quantitative test for arsenic known, however Pharmacopoeia method is based on ‘Gutzeit Method’. Concentration of arsenic beyond 0.01 mg/L in pollutant by the World Health Organization (WHO). Reasons: • Stannous chloride is used for complete evolution of arsine. • Zinc, potassium iodide and stannous chloride is used as a reducing agent. • Hydrochloride acid is used to make the solution acidic. • Lead acetate pledger or papers are used to trap any hydrogen sulphide, which may be evolved along with arsine.

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Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres of terrestrial planets via follow-up spectroscopic observations. However, the number of such planets receiving low insolation is still small, limiting our ability to understand the diversity of the atmospheric composition and climates of temperate terrestrial planets. We report the discovery of an Earth-sized planet transiting the nearby (12 pc) inactive M3.0 dwarf Gliese 12 (TOI-6251) with an orbital period (Porb) of 12.76 days. The planet, Gliese 12 b, was initially identified as a candidate with an ambiguous Porb from TESS data. We confirmed the transit signal and Porb using ground-based photometry with MuSCAT2 and MuSCAT3, and validated the planetary nature of the signal using high-resolution images from Gemini/NIRI and Keck/NIRC2 as well as radial velocity (RV) measurements from the InfraRed Doppler instrument on the Subaru 8.2 m telescope and from CARMENES on the CAHA 3.5 m telescope. X-ray observations with XMM-Newton showed the host star is inactive, with an X-ray-to-bolometric luminosity ratio of log 5.7 L L X bol » - . Joint analysis of the light curves and RV measurements revealed that Gliese 12 b has a radius of 0.96 ± 0.05 R⊕,a3σ mass upper limit of 3.9 M⊕, and an equilibrium temperature of 315 ± 6 K assuming zero albedo. The transmission spectroscopy metric (TSM) value of Gliese 12 b is close to the TSM values of the TRAPPIST-1 planets, adding Gliese 12 b to the small list of potentially terrestrial, temperate planets amenable to atmospheric characterization with JWST.

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Studying the escaping atmospheres of highly irradiated exoplanets is critical for understanding the physical mechanisms that shape the demographics of close-in planets. A number of planetary outflows have been observed as excess H/He absorption during/after transit. Such an outflow has been observed for WASP-69b by multiple groups that disagree on the geometry and velocity structure of the outflow. Here, we report the detection of this planet’s outflow using Keck/NIRSPEC for the first time. We observed the outflow 1.28 hr after egress until the target set, demonstrating the outflow extends at least 5.8 × 105 km or 7.5 Rp This detection is significantly longer than previous observations, which report an outflow extending ∼2.2 planet radii just 1 yr prior. The outflow is blueshifted by −23 km s−1 in the planetary rest frame. We estimate a current mass-loss rate of 1 M⊕ Gyr−1 . Our observations are most consistent with an outflow that is strongly sculpted by ram pressure from the stellar wind. However, potential variability in the outflow could be due to time-varying interactions with the stellar wind or differences in instrumental precision.

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The magnetic dynamo cycle of the Sun features a distinct pattern: a propagating region of sunspot emergence appears around 30° latitude and vanishes near the equator every 11 years (ref. 1). Moreover, longitudinal flows called torsional oscillations closely shadow sunspot migration, undoubtedly sharing a common cause2. Contrary to theories suggesting deep origins of these phenomena, helioseismology pinpoints low-latitude torsional oscillations to the outer 5–10% of the Sun, the near-surface shear layer3,4. Within this zone, inwardly increasing differential rotation coupled with a poloidal magnetic field strongly implicates the magneto-rotational instability5,6, prominent in accretion-disk theory and observed in laboratory experiments7. Together, these two facts prompt the general question: whether the solar dynamo is possibly a near-surface instability. Here we report strong affirmative evidence in stark contrast to traditional models8 focusing on the deeper tachocline. Simple analytic estimates show that the near-surface magneto-rotational instability better explains the spatiotemporal scales of the torsional oscillations and inferred subsurface magnetic field amplitudes9. State-of-the-art numerical simulations corroborate these estimates and reproduce hemispherical magnetic current helicity laws10. The dynamo resulting from a well-understood near-surface phenomenon improves prospects for accurate predictions of full magnetic cycles and space weather, affecting the electromagnetic infrastructure of Earth.

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It should be no surprise that AI is treading a similar path to computing which began with single-purpose machines tasked for payroll calculations, banking transactions, or weapons targeting et al, but nothing more! It took decades for General Purpose Computing to emerge in the form of the now ubiquitous PC. Today, AI is still in a single-purpose/task-specific phase, and we have no general-purpose platforms, but their emergence is only a matter of time! Recent AI progress has seen a repeat of the media debate and alarmist warnings for our computing past, compounded by consequential advances in robotics. In turn, this has promoted numerous attempts to draw biological equivalences defining the time when machines will overtake humans. But without any workable definitions or framework that tend to little more than un/educated guesses. Recourse to IQ measures and the Touring test have proved to be irrelevant, and without a reference framework or formal characterisation, continued discussion and debate remain futile We therefore approach this AI problem from the bottom up by defining the simplest of machines and lifeforms to derive clues, pointers and basic boundary conditions . This sees a fundamental Entropic description emerge that is applicable to both machine and lifeforms. This presentation is suitable for professionals and the public alike, and is fully illustrated by high-quality graphics, animations and, movies. Inevitably, it contains some mathematics that non-practitioners will have to take on trust, but the focus is on defining the key characteristics, parameters, and important features of AI, our total dependence, and the future! Note: A 40 min session for a predominantly ley audience and not all the slides presented here were used on the day. Their inclusion here is in response to those audience members requesting more detail at the end of/during the event.

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Within the uncertainties of involved astronomical and biological parameters, the Drake Equation typically predicts that there should be many exoplanets in our galaxy hosting active, communicative civilizations (ACCs). These optimistic calculations are however not supported by evidence, which is often referred to as the Fermi Paradox. Here, we elaborate on this long-standing enigma by showing the importance of planetary tectonic style for biological evolution. We summarize growing evidence that a prolonged transition from Mesoproterozoic active single lid tectonics (1.6 to 1.0 Ga) to modern plate tectonics occurred in the Neoproterozoic Era (1.0 to 0.541 Ga), which dramatically accelerated emergence and evolution of complex species. We further suggest that both continents and oceans are required for ACCs because early evolution of simple life must happen in water but late evolution of advanced life capable of creating technology must happen on land. We resolve the Fermi Paradox (1) by adding two additional terms to the Drake Equation: foc (the fraction of habitable exoplanets with significant continents and oceans) and fpt (the fraction of habitable exoplanets with significant continents and oceans that have had plate tectonics operating for at least 0.5 Ga); and (2) by demonstrating that the product of foc and fpt is very small (< 0.00003–0.002). We propose that the lack of evidence for ACCs reflects the scarcity of long-lived plate tectonics and/or continents and oceans on exoplanets with primitive life.

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PESTS OF SUGARCANE - BORERS BORERS 1. Early shoot borer, Chilo infuscatellus, Crambidae, Lepidoptera Symptom of damage: Deadheart in 1-3 month old crop, which can be easily pulled out, rotten portion of the straw coloured dead-heart emits an offensive odour. A number of bore holes at the base of the shoot just above the ground level. Nature of damage: Caterpillar bores into the central shoot and feeds on the internal tissue. This cause interference in the translocation of plant sap and damage the sugar storing tissues. Egg: Flat-scale like eggs are laid in 3-5 rows on the lower surface of leaves in masses of 4-100. The masses are slightly overlapping like tiles. Larva: Larva is dirty white with five dark violet longitudinal stripes and dark brown head. Pupa: Pupation takes place within the tunnel. Caterpillar before pupating makes a large exit hole in the stem and blocks the opening with silken discs. Adult: Pale greyish brown moth with black dots near the costal margin of the forewings and with white hindwings. 2. Internode borer, Chilo sacchariphagus indicus, Crambidae, Lepidoptera Symptom of damage: Internodes constricted and shortened, with a number of boreholes and fresh excreta in the nodal region. Affected tissues reddened. Nature of damage: Caterpillars attack sugarcane plants after 3 months of planting. They bore into the canes near the nodes; entry holes are plugged with excreta. Entry is generally confined to the first five internodes. Egg: Scale-like white eggs are laid by female moths in batches of 9-11, near the midribs, on leaf sheaths or on stem. Larva: White larva with four violet longitudinal stripes and light brown head. Pupa: Pupation takes place in semi-dried leaf sheath. Adult: Pale brown with white hind wings. 3. Top borer, Scirpophaga excerptalis, Pyralidae, Lepidoptera Symptom of damage: Deadheart in grownup canes, which cannot be easily pulled; deadheart reddish brown in colour; parallel row of shot holes in the emerging leaves and red tunnels in the midribs of leaves; bunchy tip due to the growth of side shoots. Nature of damage: Caterpillars are mainly found in the apical portion of the canes, boring through the growing point and down the upper joints until it reaches the sappy portion of the stem, there it feeds on the tissues and destroys the cane. They also bore into the unfolded leaves preferably into the midrib, mining its way to the base. Egg: Eggs are laid on the lower surface of top leaves in clusters particularly near midribs. The clusters are covered with buff coloured hairs. Larva :Smooth, white or cream coloured with a red coloured mid-dorsal line and yellow head. Pupa: Pupation takes place within the larval tunnel in a chamber with an exit hole constructed by the caterpillar. Adult: White coloured moth (with a buff coloured anal tuft in the abdominal tip of female).

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PESTS OF GREEN MANURE CROPS AND FORAGE CROPS SESBANIA BORERS 1. Sesbania stem borer, Azygophleps scalaris, Cossidae, Lepidoptera Symptom of damage: Drying of sesbania plants. Nature of damage: Stoutly built larva bores into the stem and feeds, the faecal matter getting accumulated at the entrance hole. Egg: Laid in masses attached to the leaflets. Larva: Robust larva of 7 cm length, light brown with a reddish brown head. Pupa: Pupa has spines anteriorly with the help of which it moves up and down inside the tunnel in the stem. Adult: Sluggish yellowish brown moth. 2. Stem weevil, Alcidodes bubo, Curculionidae, Coleoptera Symptom of damage: Drying of the terminal branches or whole plant, lodging of the plants during monsoon seasons; affected stem with numerous bore holes and swelling symptoms. Presence of apodous grub inside the stem. Nature of damage: Grubs riddle into stem and cause thickenings on stem. The growth and vigour of the plants are impaired to a great extent. Egg: Laid on the stem. Grub : Apodous whitish grub. Adult: Reddish brown weevil with white transverse markings on the elytra. LEAF FEEDERS 3. Green semilooper, Pericyma glaucinans, Noctuidae, Lepidoptera Symptom of damage: Defoliation of plants preceding with leaflets damage. Nature of damage: Caterpillar feeds on the leaflets remaining along the ribs of leaves. Larva : Pale green, semilooper with broad yellow lateral stripes. Adult: Dark brown with black lines 4. Green looper, Semiothisa pervelgata, Semiothisa emersaria, Geometridae, Lepidoptera Symptom of damage: Defoliation of plants preceding with leaflets damage. Nature of damage: Larvae feed on the leaves. Egg: Oval greenish eggs laid singly on leaves. Larva : Pale green looper with white lines and when full grown becomes pink with horizontal bands of violet patches dorsally on the abdominal segments. Pupa: Pupates in the soil. Adult: White colour with three dark lines and spots on the wings.

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Cyanobacteria (also known as blue-green algae) are ubiquitous photosynthetic microorganisms found in diverse habitats such as fresh water, marine water, moist rocks, etc. The photosynthetic mode of nutrition makes them significant global oxygen producers along with nitrogen-fixing ability of heterocyst and carbon sequestration. Some cyanobacterial species have the ability to perform a dual mode of nutritional procurement. This unique capability of cyanobacteria to utilize both organic (heterotrophic) and inorganic (autotrophic) carbon sources for energy production and growth is termed as mixotrophy which impart nutritional flexibility and competitive ability to them. Cyanobacterial mixotrophy provides the promising avenues in biotechnological applications such as wastewater treatment, bioremediation, pharmaceuticals, food supplements, biofertilizer, coloring agents, synthesis of bioactive compounds and as an agent for eco-friendly bio-fuels generation, etc Mixotrophically grown cyanobacteria, demonstrate significant potential for efficient and economical applications beyond their conventional agricultural application, thereby offering a versatile and impactful resource for future technological and environmental challenges.

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