This paper presents measurements of D * ± production in deep inelastic scattering from collisions between 27.5 GeV positrons and 820 GeV protons. The data have been taken with the ZEUS detector at HERA. The decay channel D * + → (D 0 → K − π + )π + (+ c.c.) has been used in the study. The e + p cross section for inclusive D * ± production with 5 < Q 2 < 100 GeV 2 and y < 0.7 is 5.3 ± 1.0 ± 0.8 nb in the kinematic region 1.3 < p T (D * ± ) < 9.0 GeV and | η(D * ± ) | < 1.5. Differential cross sections as functions of p T (D * ± ), η(D * ± ), W and Q 2 are compared with next-to-leading order QCD calculations based on the photon-gluon fusion production mechanism. After an extrapolation of the cross section to the full kinematic region in p T (D * ± ) and η(D * ± ), the charm contribution F cc 2 (x, Q 2 ) to the proton structure function is determined for Bjorken x between 2 · 10 −4 and 5 · 10 −3 .

Objective To investigate the ef®cacy of transurethral needle ablation (TUNA) of the prostate for treating chronic nonbacterial prostatitis unresponsive to conservative therapies. Patients and methods Forty-two patients (mean age 38.5 years, range 25±52) with nonbacterial prostatitis in whom clinical management was unsuccessful in relieving the symptoms or signs of prostatitis were treated using TUNA. All patients had a high leukocyte count (>15 per high-power ®eld) in expressed prostatic secretions (EPS) with no bacterial growth in either urine or prostatic secretion cultures. Before TUNA all patients were evaluated using a symptom score, satisfaction score (quality of life) and an examination of prostatic secretions. All patients were reassessed using the same variables 1 and 3 months after TUNA. Of the 42 patients, 10 had their semen analysed before and 3 months after treatment.Results The mean (SD) symptom and satisfaction scores improved signi®cantly, from 11.02 (2.90) to 5.00 (2.61) and from 4.84 (0.57) to 1.26 (1.18), respectively, 3 months after TUNA (both P<0.05). Of the 42 patients, 30 (71%) had normal EPS results within 3 months of TUNA. Also, of 37 patients with high leukocyte counts (>100 per high-power ®eld) before TUNA, 26 (70%) had normal EPS results within 3 months afterward, and 29 (78%) had a satisfaction score of <3 points. Conclusions TUNA may be a possible treatment option for patients with chronic nonbacterial prostatitis that is unresponsive to conservative therapies. A long-term follow-up and randomized studies are needed to con®rm the ef®cacy of the TUNA against intractable chronic prostatitis.

Events containing an isolated prompt photon with high transverse energy, together with a balancing jet, have been observed for the first time in photoproduction at HERA. The data were taken with the ZEUS detector, in a γp centre of mass energy range 120-250 GeV. The fraction of the incoming photon energy participating in the production of the prompt photon and the jet, x γ , shows a strong peak near unity, consistent with LO QCD Monte Carlo predictions. In the transverse energy and pseudorapidity range 5 ≤ E γ T < 10 GeV, −0.7 ≤ η γ < 0.8, E jet T ≥ 5 GeV, and −1.5 ≤ η jet ≤ 1.8, with x OBS γ > 0.8, the measured cross section is 15.3±3.8±1.8 pb, in good agreement with a recent NLO calculation.

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