Rahn-Otto · Source catalogue

A 1936 English-language monograph, written by a Cornell bacteriologist as a review of what he calls the 'mitogenetic' radiation discovered by Alexander Gurwitsch (1923): extremely weak ultraviolet light (about 1900-2600 Angstrom, short ultraviolet) said to be emitted by living cells and by ordinary chemical reactions, and said to speed up cell division in other cells that absorb it. The book has seven chapters. Chapter I (Barnes, PDF pp.15-44) is a physics primer: waves, quanta (E = h nu), the Bohr hydrogen atom, molecular spectra, monochromators, thermopiles, photographic plates, photoelectric cells and photoelectron counters (Geiger-Mueller type), with sensitivity limits (counter: the book prints 'about 10^-9 ergs/cm2 sec, or about 500 quanta/cm2 sec' [read: page image p.42]; the two printed figures do not convert into each other for ultraviolet: 1e-9 erg/cm2/s is about 100 quanta/cm2/s at 2000 A [calc, arbiter and mathematician]). Chapter II (PDF pp.45-59) lists sources of radiation; its chemical half argues that oxidations, fermentations, hydrolyses, neutralization and even dissolving NaCl emit ultraviolet, shows line spectra for individual biochemical processes obtained by using yeast or bacteria as the 'photographic plate' (50 A strips, 10 A strips; Table 11, Figs. 24 and 26), and sets out the energy problem: if each reacting sucrose molecule emitted one 2020 A quantum, 1 g of sucrose would radiate 420 cal, but Rubner measured only 9.7 cal/g for the whole hydrolysis (about 43 times less). Rahn offers a reabsorption (activation-energy chain) explanation but says the origin of the spectra 'is by no means clear'. The same chapter reports 'secondary radiation' (nucleic acid, serum, broth that has carried bacteria re-emit when irradiated, at different wavelengths and sometimes stronger; a six-cuvette 'amplifier' gave 27-fold shortening of exposure time), with Rahn's own caution that the intensity was measured only biologically and that reciprocity and polarization make it unclear that physical intensity rose. Chapter III (PDF pp.60-67) covers photochemical chain reactions and the response of cells to monochromatic ultraviolet (growth stimulation only below about 2600-2700 A, Fig. 28), and presents tables of growth stimulation by neutralization (+45% at 5 min), NaCl dissolving (+28 to +45% at 20-30 s), oxalic acid + permanganate (one unpublished run, quartz against glass control) and proteolysis (11 of 12 positive). Chapter IV (PDF pp.68-116) is the methods chapter: onion-root detector (Gurwitsch), yeast bud method (Baron, Gurwitsch, Tuthill and Rahn), cell-count, volume, nephelometer and bacterial methods, sea urchin and Drosophila eggs, chick-embryo and tissue cultures, cornea, Liesegang rings, hydrogen-peroxide decomposition, gold-sol flocculation (Heinemann), and physical counters (Rajewsky 1929, Frank and Rodionow 1930, Barth, Siebert and Seffert 1934) with Lorenz's three error sources (water vapour, charge on the quartz, muscle stimulation by the induction coil). It records unexplained failures of the detectors (Gurwitsch lab: 54 failures in 373 experiments; Heinemann, Siebert, Wolff and Ras, and Rahn himself had stretches of complete negative results; ten recorded failures in all, listed in the deep read). It also covers harmful 'menstrual' and fingertip radiation through quartz (Christiansen, Ferguson; one student's fingertip killed yeast in 5 minutes held over a glass ring with no glass between finger and yeast, and in 15 minutes through 2 mm of quartz sealed with lanolin [read: page image p.111]), Lepeschkin's 'necrobiotic rays', one infrared effect (Nelson and Brooks, fertilization of sea urchin eggs decreased 18.5-87.1%), and potassium beta radiation (Zwaardemaker frog hearts). Chapter V (PDF pp.117-132) gives the special properties: intermittent irradiation (pulsed light 30 times more effective than continuous), secondary radiation in onion roots and frog nerves (conduction speed about 30 m/s in onion root and 30 +/- 3 m/s in frog sciatic nerve [read: page image p.126, p.173]; the text layer and digest misread this as '303 m/s'), over-dose depression and periodic stimulation/depression. Chapter VI (PDF pp.133-146) is the analysis of the effect: sensitivity only at a particular physiological stage (lag/rejuvenation phase), no proportionality between intensity and effect, single-quantum triggering discussed (strongest sender about 100-1000 quanta/cm2/s; probability of one quantum per yeast cell per second 0.00042), Gurwitsch's 'mitogenetic field', Reiter and Gabor's cytological reading of the onion root. Chapter VII (PDF pp.145-203) is the significance: radiation from young cultures, protozoa, plants, eggs, embryos, adult tissues, blood (healthy blood radiates, glycolytic; absent in cancer, leukaemia, severe sepsis, senility; Protti and Heinemann's cytagenin and 'rejuvenation' claims), nerve and brain (Anna Gurwitsch's optic-nerve and optic-lobe work, parabiosis of nerve by irradiation), morphological effects (sea urchin larvae, tadpole metamorphosis, yeast forms), parthenogenesis (3 of a few hundred frog eggs), symbiosis and antagonism (Acs), wound healing (Blacher: tadpole tail wounds, 26-33% effects, double maximum), cancer (tumour tissue radiates; blood of cancer patients does not; Gesenius, Heinemann, Klenitzky; Protti's 'cytophotolysis'; Roffo's ultraviolet and cholesterol results in rats: 700 rats, 52% cancer in 10-11 months, none under tungsten lamp controls), and harmful human radiation traced to oxy-cholesterol (Rahn and, probably, M. N. Barnes 1933, not the physicist S. W. Barnes: of 5 batches of oxy-cholesterol, 4 killed or mostly killed Mycoderma through quartz on day 1 [read: page image p.200]; no glass control is shown in Table 53a). The Outlook (PDF pp.201-206) states that Rahn is a biologist convinced by his own experience, that the question is unsettled after 12 years through faults on both sides, that repeating 'with the same directions' and getting nothing is not disproof, and that the interpretation (ultraviolet) matters less than the biological effect. Pages 207-230 are an author index and subject index. Additions from the QE deep reads (pages are PDF pages; [read: page image] where tables were read from images). (1) Detectors and their weaknesses, in Rahn's own words: the 'induction effect' (exposed minus control, over control) 'has no definite meaning' and 'no quantitative value whatever'; Table 26 shows an effect of 183 from cell counts that is 27 when computed from generation time [read: pp.92-94, 128]. Julius (1935) split chick fibroblast cultures between glass and quartz: 56 pairs gave 1.92 +/- 0.15, 48 unirradiated pairs gave 1.01 +/- 0.08, difference 0.91 +/- 0.17 'probable error', only on poor media [read: page image p.97]. Rahn's own caveat on Paul (1933), the onion-root work that verifies Gurwitsch: 'the number of examples given is not large enough to draw many more conclusions' [read: p.77]; the opposing study by Motshejewa (1931-32) attributes the effect to pressure, light for centring, root selection and omission of sections [read: p.76]. Schwemmle (1929) found the +/-10% error at 500 mitoses from the school's own 'not induced' roots [read: p.72]. Gesenius's yeast counts: 102 fermentation runs (68 increase, 4 decrease, 30 within error) and 54 respiration runs (40 decrease, 1 increase, 13 within error), at 7-10 billion cells per cc, which Rahn says is 10-100 times the medium's maximum population, so 'mutual irradiation of the cells must play an important role' [read: page image p.99]. (2) A wavelength dispute inside the field: Reiter and Gabor (1928, Siemens) reported the effective rays at 3200-3500 A with a sharp maximum at 3400 A, a second at 2800 A, and 'antagonistic' rays at 2900-3200 A; Gurwitsch's school found 1900-2370 A and repeated the German work with negative results at 3400 A (Frank 1929; Chariton, Frank and Kannegiesser 1930; Table 18). Rahn explains the German spectrograph runs as a technique error but concedes their 'deviating experiences ... have never been accounted for in a really satisfactory way' and does not address their glass-transmission and filter results [read: pp.73-76]. Reiter and Gabor also reported parthenogenesis of unfertilised eggs at 3340 A only: 2 + 1 salamander eggs from groups of about 5, and 3 frog eggs from 'a few hundred' [read: p.184]. (3) Non-biological detectors: Stempell's Liesegang rings (disturbed by radiation, but also by volatile onion oil; Stempell himself says the effect is 'usually' a combined radiation and chemical action) and H2O2 decomposition [read: pp.102-103]; Heinemann's gold-sol nephelometer (blood about 26 units after 15 minutes against about 2-3 for controls; dissolving NaCl 1 to 21; single runs, no repeats) [read: page image p.104]; Lepeschkin's silver bromide and Eastman Speedway plate results (dying yeast only, not dead or living yeast; wavelength estimated 1800-2300 A) and Suchow and Suchowa (egg white coagulated over AgBr: quartz vessel darkened sooner in 25 of 25 experiments) [read: pp.113-115]; Taylor and Harvey (1932) got no photographic effect in 90 days [read: page image p.104]. (4) Physical counters, Table 30: Rajewsky excesses 10-29% (1.3-8.8 combined standard errors [calc]); Frank and Rodionow 21-233% (2.5-9.6 [calc]); no sample sizes or blank controls printed. Lorenz's three error sources are water vapour on the quartz, charge on the quartz tube, and tetanising muscle with an induction coil in front of the window; Rahn concludes 'it seems well to view with caution the positive results'. Kreuchen and Bateman (Table 30a): every surface except Rajewsky's claimed 1e2 quanta per electron needs more than 2000 quanta per electron. Siebert and Seffert (1934): 'several hundred normal blood samples' raised counts, carcinoma blood did not, and normal blood replaced by blood plus KCN gave no increase, which Rahn calls 'most convincing' [read: page images pp.105-106]. (5) Failures: ten recorded, including Golishewa's 54 of 373 (identified because all associates using that culture that day were also negative), Gurwitsch's laboratory losing every effect for days to weeks, Heinemann and Siebert abandoning yeast for physical methods, and Rahn's own periods. Rahn argues that many parallel runs on one day prove nothing because the day may be a failure day (against Kreuchen and Bateman) and that failures 'have nothing to do with the error of the method'; no same-day positive control is proposed [read: pp.107-109]. (6) Special properties (Chapter V, Gurwitsch 1932 as source, reported by Rahn): intermittent irradiation (Table 31: 12.5-13 s of actual exposure at 100-800 interruptions per second against 6-8 minutes continuous, about 1/30; 50 per second needs about 30 s; 11 conditions with 1-4 values each; a regular disc worked and an irregular one did not; effect over 15 cm against 3-4 cm continuous; Rahn concedes Warburg's Chlorella analogy 'is not at all certain' and that threshold times may not measure intensity); daylight dependence (Potozky 1930, Table 33: daylight-grown yeast exposed in daylight gave 20-35%, dark-grown yeast -6 to +6.5%; recovers after about 2 hours in daylight); secondary radiation spreading 9-12 mm in a yeast lawn, exhaustion within about 30 minutes and recovery after 10 minutes rest in nerve (Fig. 40, one run); conduction time 0.00083 s over 5 cm (30 m/s, my arithmetic agrees); polarisation (Wolff and Ras 1934a, 'enormously greater' effect, no data given); depression at 2.5 minutes or more by bud count where cell counts show 22-123% increases (Table 34), and Salkind's periodicity (Table 35) in which Rahn finds 'no definite periodicity'; and an approach experiment (blocks moved together over 5-8 minutes gave no effect, blocks placed at once gave +40-50%) [read: pp.117-132]. (7) Analysis (Chapter VI): no proportionality between exposure and effect (Tuthill-Rahn yeast-bud table: 10, 20, 40 min give +4, +15, +4 points against a control of 21%); single-quantum calculation at an assumed flux of 1000 quanta/cm2/s (probability 0.00042 per cell per second, 40 minutes for one hit per cell), which Rahn then calls 'unnecessary, even improbable' once secondary radiation of the medium is allowed for; Rahn's own paradox that fermenting yeast emits the very lines that stimulate it; Ferguson and Rahn Table 36 (irradiated 3-day Bacterium coli culture grew 3.4 to 4.2 times faster at 6 hours even when transplanted 2 hours after irradiation); Ferguson's unpublished two-sided irradiation (no cancellation, against Gurwitsch's interference idea); Reiter-Gabor Table 37 (onion-root nuclear stages) and their claim that the shaded control side is itself affected [read: pp.133-144]. (8) Blood, tissue and nerve (Chapter VII D-F): Gurwitsch-school methods for blood (no skin disinfection, rapid drying, exposure within 1-1.5 minutes of wetting); starved rats (2.5, 5, 2 without glucose; 21, 44, 36, 39 with 2% glucose, far above blood glucose); factory-worker blood before and after work (Table 47: 21-45 before, -13 to 12 after); Protti's rejuvenation series (Table 48, ten cases, no controls); Seyderhelm's cytagenin; Kalendaroff's frog sciatic nerve spectra with Rahn's own note of a possible calibration shift; Anna Gurwitsch's optic-nerve, optic-lobe and colour experiments (Table 49; colour intensities and wavelengths not stated); Latmanisowa's parabiosis of the sciatic nerve by radiation from protein digestion (more than 40 repeats; controls: gastric juice without protein, and the unexposed part of the same nerve) and Lapitzki's mercury-lamp result [read: pp.160-174]. (9) Morphology, development and wounds (PDF pp.175-191): Magrou Table 29 (sea urchin larvae abnormal in 75-100% of 118 microorganism experiments through quartz and 85% of 54 chemical-reaction experiments, 0% in 221 controls; but 43% with Pseudomonas tumefaciens through glass, and Magrou and Reiss offered an electrical explanation themselves: glass-paraffin-glass transmits, a metal connection prevents it); Blacher's freed-leg tadpole series (glass-bottom operation control -6.5% +/- 0.8 and -4.5% +/- 1.3, quartz +4.1% +/- 1.1 and +7.4% +/- 1.2, net gain 10.6% +/- 1.4 and 12.1% +/- 1.8, n = 22, 44, 33, 51; my arithmetic gives 11.9 for the second); Table 51 wound healing (+11 to +54% within animal in irradiated rows, -10 to +9 in glass controls); Table 50 double maximum at 12 and 36 hours resting on thin partly empty rows; Kostoff and Kendall (120 tomato plants, 7 shoots from the tumour, 1 tetraploid); Acs antagonism (22-136% retardation in 14 experiments; no quartz-glass control stated) [read: pp.175-191]. (10) Cancer and oxy-cholesterol (PDF pp.191-200): the blood test has no case counts, sensitivity, specificity or blinding on these pages; Gesenius reports 'occasional exceptions' and that radiation stays absent after tumour removal, while Klenitzky (1934) reports its return and Heinemann says a positive result excludes tumour 'with certainty'; Braunstein and Heyfetz rat series (Table 53, groups of 3-14); Protti's 12 + 12 mouse starvation experiment, 'cytophotolysis' and yeast injections with a heated-yeast control; Roffo (700 rats 52% in 10-11 months in sunlight, 150 rats all with tumours in 4 months under ultraviolet of 14 erythemal units, none under a tungsten lamp, control size not stated; Rahn notes sunlight lacks wavelengths below 2700 A, which 'speaks very much against' the 1800-2600 A link). Roffo's printed skin-site percentages sum to 100.20. Table 53a records five batches (day 1: I dead, II dead, III normal, IV mostly dead, V dead) with no glass control and no blank control [read: pp.191-200]. Peripheral items also on record: Nelson and Brooks (infrared, 9 of 9 experiments, 18.5-87.1% fewer fertilisations, temperature difference at most 0.06 C); Zwaardemaker (potassium-substitute beta radiation, 34 experiments); Siebert's frog-muscle tables (24 experiments, excited exceeds resting in all) [read: pp.79, 115-116].

Key claims

• Living cells and tissues in the right physiological state (young yeast and bacterial cultures, onion root tips, active muscle, blood, nerve, tumours, developing eggs) emit ultraviolet radiation of about 1900-2600 Angstrom that speeds up cell division in suitable detector cells.
• The radiation passes through quartz but not glass, is reflected, refracted and dispersed, so that it is true radiation and not a chemical vapour effect.
• Ordinary chemical reactions (oxidation, glycolysis and fermentation, proteolysis, nucleic acid and phosphate cleavage, neutralization of acid by alkali, dissolving NaCl) emit short ultraviolet, as shown by photoelectron counters (Table 10: for example pyrogallol + NaOH + air 15 against 10 counts in 10 min) and by yeast and bacteria used as detectors.
• Each biochemical process has its own characteristic set of narrow ultraviolet bands, for example blood glycolysis has 5 positive 10 A strips out of 60, and these bands coincide for yeast fermentation, streptococcal lactic fermentation and blood glycolysis.
• Neutralization of NaOH by HCl for about 5 minutes raises the cell count of a staphylococcus culture by about 45% through quartz, and dissolving NaCl does the same for 20-30 seconds only while salt is dissolving.
• If each reacting sucrose molecule emitted one 2020 A quantum, 1 g of sucrose would give off about 420 cal of radiation, which is about 43 times Rubner's measured total heat of 9.7 cal/g; Rahn proposes reabsorption of the energy (activation chain with a small wall leak) rather than a measurement error.
• Solutions of nucleic acid, serum and broth that has carried bacteria re-emit ultraviolet when irradiated ('secondary radiation'), at a different wavelength from the primary (3220-3240 A in, 2450-2500 A out) and sometimes more strongly, and become exhausted by long exposure and recover after a day or two.
• Secondary radiation travels along onion roots at about 30 m/s and along frog sciatic nerve at 30 +/- 3 m/s, the same speed as the nerve impulse, and irradiating a nerve for about 2 hours produces the classic stages of parabiosis in 40 or more repeated experiments.
• Pulsed (intermittent) irradiation at about 100-800 pulses per second (50 per second is already close to continuous) produces a detectable effect in about one-thirtieth of the time continuous irradiation needs.
• One ultraviolet quantum per cell may be enough to trigger a division that the cell then powers from its own metabolism; the effect is not proportional to intensity and only occurs in a particular physiological (lag or rejuvenation) stage.
• Normal human and animal blood radiates (it is glycolytic) and blood from cancer patients, and in leukaemia, severe sepsis and old age, does not, so that blood radiation can exclude a tumour or prompt a search for one (Heinemann, Gesenius).
• Malignant tumours radiate strongly (glycolytic in living parts, proteolytic in necrotic parts) while normal adult tissue and benign tumours do not.
• Resorbed tissue in tadpole metamorphosis and tissue at amputation wounds radiate, and irradiation through quartz speeds forelimb growth by about 10-12% and tail-wound healing by about 26-33%, with a double maximum in time.
• Sea urchin larvae, yeast and bacteria develop abnormal forms when irradiated by menstrual blood, saliva and certain fingertips through quartz, and oxy-cholesterol (the proposed 'menotoxin') radiated through quartz and killed or mostly killed Mycoderma yeast in 4 of 5 batches on the first day (Table 53a: three dead, one mostly dead; no glass control shown).
• Roffo's rats exposed to unfiltered ultraviolet developed skin tumours in 4 months (all of 150 animals) and sunlight produced tumours in 52% of 700 rats in 10-11 months, with none under a tungsten lamp; Rahn suggests short-ultraviolet-induced cell division as a possible link.
• Negative replications are no disproof because the detectors respond only in a specific physiological state and fail unpredictably for days or weeks; the experimental error of biological detectors is large and differs between laboratories (10% to 50% in onion-root work).
• Mitogenetic radiation cannot be dismissed as within experimental error: Schwemmle's analysis of about 200 published onion-root results found a probable error of +/-10% for 500 mitoses and the positive results fell outside it, while Lorenz and Moissejewa's attempts at disproof were limited or contradicted (Rahn's reading).
• Potassium beta radiation from K-40 is physiologically important (Zwaardemaker restarted potassium-free frog hearts with radium or mesothorium in 34 experiments) but is not characteristic of living cells and is identical in dead tissue.
• A fingertip of one student killed Saccharomyces mycoderma punctisporus in 5 minutes when held over a glass ring with an open air gap, and in 15 minutes through a lanolin-sealed 2 mm quartz plate; others' fingers on the same culture had no marked effect; a man recovering from herpes zoster also killed yeast through quartz in 15 minutes for about 6 months [read: page image p.111].
• Physical counters respond to biological sources: Rajewsky's onion root and mouse carcinoma excesses of 10-29% over control, Frank and Rodionow's frog muscle and heart excesses of 21-233% (Table 30), and Siebert and Seffert's several hundred normal blood samples raised counts, carcinoma blood did not, and blood plus KCN gave no increase; Lorenz named water vapour, quartz charge and induction-coil stimulation as artefacts and Rahn says none is certainly excluded.
• Reiter and Gabor found the effective rays at 3200-3500 A (maximum 3400 A, second maximum 2800 A, antagonistic rays 2900-3200 A), against the Gurwitsch school's 1900-2400 A; the Gurwitsch school's repeats were negative at 3400 A and Rahn calls the German results unexplained.
• Mitogenetic induction depends on the sender having been in daylight: yeast grown in the dark gave -6 to +6.5% and daylight-grown yeast exposed in daylight gave 20-35% (Potozky 1930, Table 33), regaining the power after about 2 hours of daylight; Rahn says this probably accounts for some negative results.
• Secondary radiation is polarised by reflection and polarised rays have an enormously greater biological effect (Wolff and Ras 1934a), so that 'all previous measurements of intensities have become practically meaningless' (Rahn); no numbers or method are given.
• Slowly bringing two yeast blocks together over 5-8 minutes gives no induction while placing them at the final distance at once gives +40 to +50%, an adaptation to gradual intensity change (Gurwitsch 1932).
• Non-biological detectors register the radiation: Heinemann's gold-sol flocculation (blood about 26 units against 2-3 for controls), Lepeschkin's blackening of silver bromide and photographic plates by dying yeast only, and Suchow and Suchowa's 25 of 25 experiments in which a quartz vessel over coagulating egg white darkened silver bromide sooner than a glass vessel; Stempell's Liesegang rings are disturbed by radiation but also by volatile substances.
• Light on a frog's eyes makes the optic lobes radiate and the spectrum changes with the colour of the light and with electrical irritation of the sciatic nerve (Anna Gurwitsch 1932, 1934), proposed as a way to localise brain function; colour intensities and wavelengths are not stated.
• Yeast injections liquefied rat sarcoma and yeast mixed with or separated by quartz from tumour cells destroyed them in vitro, while heated yeast had no effect (Protti 1934, 'cytophotolysis'); injection of young blood restored radiation in old patients with claimed clinical 'rejuvenation' (Protti, Table 48, ten cases, no controls); cytagenin raised blood radiation (Seyderhelm, Heinemann).
• Pseudomonas pyocyanea retarded Bacillus anthracis by 22-136% in 14 experiments through radiation and yeast retarded staphylococci in 5 experiments (Acs 1933); Kostoff and Kendall obtained one tetraploid shoot from tomato tumour tissue (120 plants); Nelson and Brooks found infrared lowered sea urchin fertilisation in 9 of 9 experiments.
• Reiter and Gabor induced a few unfertilised eggs to divide with 3340 A only (3 salamander eggs from groups of about 5; 3 frog eggs from a few hundred).
• Rahn's own concessions: the 'induction effect' has 'no quantitative value whatever'; the bud-count method can show depression where cell counts show growth; Salkind's data show 'no definite periodicity'; the single-quantum inference is 'unnecessary, even improbable' once secondary radiation of the medium is allowed for; and the physical counter results should be viewed 'with caution'.

Relevance: This is the only document in the project and the primary source for everything in it: a contemporary, English-language and fairly even-handed summary of the Gurwitsch school's mitogenetic radiation (1923-1935) by an American microbiologist who repeated parts of it himself (Ferguson and Rahn 1933, Tuthill and Rahn 1933, Barnes and Rahn 1933). It lays out the experimental detectors, the numbers and the controls, the physical counter evidence and its criticisms (Lorenz), the energy problem, and the records of failure. It is also the source of the biological-radiation ideas that later alternative science drew on (cell-to-cell light signalling, spectral fingerprints of biochemical reactions, blood tests, cancer as a radiation disorder). Its author is an advocate with a stake in the reality of the effect (he did experiments on it), though he states the objections and failures openly; the Gurwitsch school's results are reported at second hand from papers published mostly in Russian and German. The Gurwitsch school's 1932 monograph is the source of most Chapter V-VII numbers; Rahn reproduces them with their gaps (no replicates, error limits or screening controls in most tables) and says so himself in several places. Interested parties: Rahn, Ferguson, Tuthill and M. N. Barnes (his laboratory) report the yeast and bacteria protocols and the fingertip and oxy-cholesterol work; Gurwitsch criticises Reiter and Gabor; Terzano and Co. (Milan), maker of Protti's hemoradiometer, has a commercial stake; Heinemann, Seyderhelm and Protti had clinical stakes in cytagenin and 'rejuvenation'.

Mainstream conflict: Mainstream biophysics did not adopt mitogenetic radiation: in the following decades it was not reproduced reliably and was largely abandoned [memory, medium confidence; web check pending in Step 2]. Specific points of conflict: (1) the energy budget (a 2020 A photon is about 6.1 eV, about 141 kcal/mol, against a measured reaction heat of about 3.3 kcal/mol per sucrose molecule, so one photon per molecule is energetically impossible; Rahn raises this himself and leaves it open); (2) the claim that growth is triggered by one quantum per cell and is not proportional to intensity; (3) speed of secondary radiation in nerve (30 m/s) as a conduction mechanism, which physiologists of the time opposed (Rahn p.174 of PDF); (4) the claimed blood test for cancer. Parts that sit better with modern physics: weak ultraviolet emission from oxidative metabolism (ultra-weak photon emission, 'biophotons') and chemiluminescence are established in later literature [memory, medium confidence]; the radiation of ultraviolet from some reactions and the quartz/glass distinction are physically ordinary. The Step 2 reviewers should check these. Additional points added after the deep reads: (5) Reiter and Gabor's 3200-3500 A and the school's 1900-2400 A cannot both define the radiation (an internal dispute; Dennis Gabor, later a physics Nobel laureate, was a co-author [memory, high confidence on identity; the book gives only 'Gabor']); (6) frog sciatic nerve conduction velocity of about 30 m/s is in the normal range for frog nerve [memory, high], so the agreement Rahn claims is numerically right; whether secondary radiation could carry a nerve impulse is a separate matter that physiologists of the time opposed; (7) wound, tumour, blood-test and Roffo results are medical or biological claims whose agreement with mainstream knowledge belongs to the reviewers; Rahn labels hypernephroma and glioma 'benign' as Gesenius's text reads [read: p.193], whereas both are generally malignant [memory, high].